Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WinForms / System / WinForms / Design / ControlDesigner.cs / 3 / ControlDesigner.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
/*
*/
namespace System.Windows.Forms.Design {
using System.Design;
using Accessibility;
using System.Runtime.Serialization.Formatters;
using System.Threading;
using System.Runtime.InteropServices;
using System.CodeDom;
using System.ComponentModel;
using System.Diagnostics;
using System;
using System.Security;
using System.Security.Permissions;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel.Design;
using System.ComponentModel.Design.Serialization;
using System.Windows.Forms;
using System.Windows.Forms.Design.Behavior;
using System.Drawing;
using System.Drawing.Design;
using Microsoft.Win32;
using System.Configuration;
using Timer = System.Windows.Forms.Timer;
using System.Globalization;
using System.Diagnostics.CodeAnalysis;
///
///
/// Provides a designer that can design components
/// that extend Control.
///
public class ControlDesigner : ComponentDesigner {
///
/// [To be supplied.]
///
protected static readonly Point InvalidPoint = new Point(int.MinValue, int.MinValue);
private static int currentProcessId;
private IDesignerHost host; // the host for our designer
private IDesignerTarget designerTarget; // the target window proc for the control.
private bool liveRegion; // is the mouse is over a live region of the control?
private bool inHitTest; // A popular way to implement GetHitTest is by WM_NCHITTEST...which would cause a cycle.
private bool hasLocation; // Do we have a location property?
private bool locationChecked;// And did we check it
private bool locked; // signifies if this control is locked or not
private bool initializing;
private bool enabledchangerecursionguard;
//Behavior work
private BehaviorService behaviorService; //we cache this 'cause we use it so often
private ResizeBehavior resizeBehavior; //the standard behavior for our selection glyphs - demand created
private ContainerSelectorBehavior moveBehavior; //the behavior for non-resize glyphs - demand created
// Services that we use enough to cache
//
private ISelectionUIService selectionUISvc;
private IEventHandlerService eventSvc;
private IToolboxService toolboxSvc;
private InheritanceUI inheritanceUI;
private IOverlayService overlayService;
// transient values that are used during mouse drags
//
private Point mouseDragLast = InvalidPoint; // the last position of the mouse during a drag.
private bool mouseDragMoved; // has the mouse been moved during this drag?
private int lastMoveScreenX;
private int lastMoveScreenY;
// Values used to simulate double clicks for controls that don't support them.
//
private int lastClickMessageTime;
private int lastClickMessagePositionX;
private int lastClickMessagePositionY;
private Point downPos = Point.Empty; // point used to track first down of a double click
private event EventHandler disposingHandler;
private CollectionChangeEventHandler dataBindingsCollectionChanged;
private Exception thrownException;
private bool ctrlSelect; // if the CTRL key was down at the mouse down
private bool toolPassThrough; // a tool is selected, allow the parent to draw a rect for it.
private bool removalNotificationHooked = false;
private bool revokeDragDrop = true;
private bool hadDragDrop;
private DesignerControlCollection controls;
private static bool inContextMenu = false;
private DockingActionList dockingAction;
private StatusCommandUI statusCommandUI; // UI for setting the StatusBar Information..
private bool forceVisible = true;
private bool autoResizeHandles = false; // used for disabling AutoSize effect on resize modes. Needed for compat.
private Dictionary subclassedChildren;
///
/// Accessor for AllowDrop. Since we often turn this on, we shadow it
/// so it doesn't show up to the user.
///
private bool AllowDrop {
get {
return (bool)ShadowProperties["AllowDrop"];
}
set {
ShadowProperties["AllowDrop"] = value;
}
}
/// SubclassedChildWindows {
get {
if (subclassedChildren == null) {
subclassedChildren = new Dictionary();
}
return subclassedChildren;
}
}
private IOverlayService OverlayService {
get {
if (overlayService == null) {
overlayService = (IOverlayService)GetService(typeof(IOverlayService));
}
return overlayService;
}
}
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
private DesignerControlCollection Controls {
get {
if (controls == null) {
controls = new DesignerControlCollection(Control);
}
return controls;
}
}
private Point Location {
get {
Point loc = Control.Location;
ScrollableControl p = Control.Parent as ScrollableControl;
if (p != null) {
Point pt = p.AutoScrollPosition;
loc.Offset(-pt.X, -pt.Y);
}
return loc;
}
set {
ScrollableControl p = Control.Parent as ScrollableControl;
if (p != null) {
Point pt = p.AutoScrollPosition;
value.Offset(pt.X, pt.Y);
}
Control.Location = value;
}
}
///
///
/// Retrieves a list of associated components. These are components that should be incluced in a cut or copy operation on this component.
///
///
public override ICollection AssociatedComponents {
get {
ArrayList sitedChildren = null;
foreach (Control c in Control.Controls) {
if (c.Site != null) {
if (sitedChildren == null) {
sitedChildren = new ArrayList();
}
sitedChildren.Add(c);
}
}
if (sitedChildren != null) {
return sitedChildren;
}
return base.AssociatedComponents;
}
}
///
/// Accessor method for the context menu property on control. We shadow
/// this property at design time.
///
private ContextMenu ContextMenu {
get {
return (ContextMenu)ShadowProperties["ContextMenu"];
}
set {
ContextMenu oldValue = (ContextMenu)ShadowProperties["ContextMenu"];
if (oldValue != value) {
EventHandler disposedHandler = new EventHandler(DetachContextMenu);
if (oldValue != null) {
oldValue.Disposed -= disposedHandler;
}
ShadowProperties["ContextMenu"] = value;
if (value != null) {
value.Disposed += disposedHandler;
}
}
}
}
///
/// [To be supplied.]
///
protected AccessibleObject accessibilityObj = null;
///
/// [To be supplied.]
///
public virtual AccessibleObject AccessibilityObject {
get {
if (accessibilityObj == null) {
accessibilityObj = new ControlDesignerAccessibleObject(this, Control);
}
return accessibilityObj;
}
}
///
/// Retrieves the control we're designing.
///
public virtual Control Control {
get {
return(Control)Component;
}
}
private IDesignerTarget DesignerTarget {
get {
return designerTarget;
}
set {
this.designerTarget = value;
}
}
///
/// Accessor method for the enabled property on control. We shadow
/// this property at design time.
///
private bool Enabled {
get {
return (bool)ShadowProperties["Enabled"];
}
set {
ShadowProperties["Enabled"] = value;
}
}
///
/// Determines whether drag rects can be drawn on this designer.
///
protected virtual bool EnableDragRect {
get {
return false;
}
}
///
/// Gets / Sets this controls locked property
///
///
private bool Locked {
get {
return locked;
}
set{
if (locked != value) {
locked = value;
}
}
}
private string Name {
get {
return Component.Site.Name;
}
set {
// don't do anything here during loading, if a refactor changed it we don't want to do anything
IDesignerHost host = GetService(typeof(IDesignerHost)) as IDesignerHost;
if(host == null || (host != null && !host.Loading)) {
Component.Site.Name = value;
}
}
}
///
/// Returns the parent component for this control designer.
/// The default implementation just checks to see if the
/// component being designed is a control, and if it is it
/// returns its parent. This property can return null if there
/// is no parent component.
///
protected override IComponent ParentComponent {
get {
Control c = Component as Control;
if (c != null && c.Parent != null) {
return c.Parent;
}
return base.ParentComponent;
}
}
///
/// Determines whether or not the ControlDesigner will allow SnapLine alignment during a
/// drag operation when the primary drag control is over this designer, or when a control
/// is being dragged from the toolbox, or when a control is being drawn through click-drag.
///
///
public virtual bool ParticipatesWithSnapLines {
get {
return true;
}
}
///
/// Returns the number of internal control designers in the ControlDesigner. An internal control
/// is a control that is not in the IDesignerHost.Container.Components collection.
/// SplitterPanel is an example of one such control. We use this to get SnapLines for the internal
/// control designers.
///
public virtual int NumberOfInternalControlDesigners() {
return 0;
}
///
/// Returns the internal control designer with the specified index in the ControlDesigner. An internal control
/// is a control that is not in the IDesignerHost.Container.Components collection.
/// SplitterPanel is an example of one such control.
///
/// internalControlIndex is zero-based.
///
public virtual ControlDesigner InternalControlDesigner(int internalControlIndex) {
return null;
}
///
/// Per AutoSize spec, determines if a control is resizable.
///
[SuppressMessage("Microsoft.Performance", "CA1808:AvoidCallsThatBoxValueTypes")]
private bool IsResizableConsiderAutoSize(PropertyDescriptor autoSizeProp, PropertyDescriptor autoSizeModeProp) {
object component = Component;
bool resizable = true;
bool autoSize = false;
bool growOnly = false;
if (autoSizeProp != null &&
!(autoSizeProp.Attributes.Contains(DesignerSerializationVisibilityAttribute.Hidden) ||
autoSizeProp.Attributes.Contains(BrowsableAttribute.No))) {
autoSize = (bool) autoSizeProp.GetValue(component);
}
if (autoSizeModeProp != null) {
AutoSizeMode mode = (AutoSizeMode) autoSizeModeProp.GetValue(component);
growOnly = mode == AutoSizeMode.GrowOnly;
}
if (autoSize) {
resizable = growOnly;
}
return resizable;
}
///
///
///
///
public bool AutoResizeHandles {
get {
return autoResizeHandles;
}
set {
autoResizeHandles = value;
}
}
///
/// Retrieves a set of rules concerning the movement capabilities of a component.
/// This should be one or more flags from the SelectionRules class. If no designer
/// provides rules for a component, the component will not get any UI services.
///
public virtual SelectionRules SelectionRules {
get {
SelectionRules rules = SelectionRules.Visible;
object component = Component;
rules = SelectionRules.Visible;
PropertyDescriptor prop;
PropertyDescriptorCollection props = TypeDescriptor.GetProperties(component);
PropertyDescriptor autoSizeProp = props["AutoSize"];
PropertyDescriptor autoSizeModeProp = props["AutoSizeMode"];
if ((prop = props["Location"]) != null &&
!prop.IsReadOnly) {
rules |= SelectionRules.Moveable;
}
if ((prop = props["Size"]) != null && !prop.IsReadOnly) {
if (AutoResizeHandles && this.Component != host.RootComponent) {
rules = IsResizableConsiderAutoSize(autoSizeProp, autoSizeModeProp) ? rules | SelectionRules.AllSizeable : rules;
}
else {
rules |= SelectionRules.AllSizeable;
}
}
PropertyDescriptor propDock = props["Dock"];
if (propDock != null) {
DockStyle dock = (DockStyle)(int)propDock.GetValue(component);
//gotta adjust if the control's parent is mirrored...
//this is just such that we add the right resize handles.
//We need to do it this way, since resize glyphs are added in
//AdornerWindow coords, and the AdornerWindow is never mirrored.
if (Control.Parent != null && Control.Parent.IsMirrored) {
if (dock == DockStyle.Left) {
dock = DockStyle.Right;
}
else if (dock == DockStyle.Right) {
dock = DockStyle.Left;
}
}
switch (dock) {
case DockStyle.Top:
rules &= ~(SelectionRules.Moveable | SelectionRules.TopSizeable | SelectionRules.LeftSizeable | SelectionRules.RightSizeable);
break;
case DockStyle.Left:
rules &= ~(SelectionRules.Moveable | SelectionRules.TopSizeable | SelectionRules.LeftSizeable | SelectionRules.BottomSizeable);
break;
case DockStyle.Right:
rules &= ~(SelectionRules.Moveable | SelectionRules.TopSizeable | SelectionRules.BottomSizeable | SelectionRules.RightSizeable);
break;
case DockStyle.Bottom:
rules &= ~(SelectionRules.Moveable | SelectionRules.LeftSizeable | SelectionRules.BottomSizeable | SelectionRules.RightSizeable);
break;
case DockStyle.Fill:
rules &= ~(SelectionRules.Moveable | SelectionRules.TopSizeable | SelectionRules.LeftSizeable | SelectionRules.RightSizeable | SelectionRules.BottomSizeable);
break;
}
}
PropertyDescriptor pd = props["Locked"];
if (pd != null) {
Object value = pd.GetValue(component);
// make sure that value is a boolean, in case someone else added this property
//
if (value is bool && (bool)value == true) {
rules = SelectionRules.Locked | SelectionRules.Visible;
}
}
return rules;
}
}
// This boolean indicates whether the Control will allow SnapLines to be shown when any other targetControl is dragged on the design surface.
// This is true by default.
internal virtual bool ControlSupportsSnaplines
{
get
{
return true;
}
}
///
///
/// Used when adding snaplines
///
/// In order to add padding, we need to get the offset from the usable client area of our control
/// and the actual origin of our control. In other words: how big is the non-client area here?
/// Ex: we want to add padding on a form to the insides of the borders and below the titlebar.
///
internal Point GetOffsetToClientArea() {
NativeMethods.POINT nativeOffset = new NativeMethods.POINT(0,0);
NativeMethods.MapWindowPoints(Control.Handle, Control.Parent.Handle, nativeOffset, 1);
Point offset = Control.Location;
// If the 2 controls do not have the same orientation, then force one
// to make sure we calculate the correct offset
if (Control.IsMirrored != Control.Parent.IsMirrored) {
offset.Offset(Control.Width,0);
}
return (new Point(Math.Abs(nativeOffset.x - offset.X), nativeOffset.y - offset.Y));
}
internal IList SnapLinesInternal() {
return SnapLinesInternal(Control.Margin);
}
///
/// We separate this from the SnapLines property so that other designers
/// can call this directly. E.g. SplitContainerDesigner would inherit
/// SnapLines from ParentControlDesigner which overrides SnapLines.
/// But ParentControlDesigner.SnapLines also adds padding SnapLines,
/// which we don't want for the SplitContainerDesigner.
///
internal IList SnapLinesInternal(Padding margin) {
ArrayList snapLines = new ArrayList(4);
int width = Control.Width; // better perf
int height = Control.Height; // better perf
//the four edges of our control
snapLines.Add( new SnapLine(SnapLineType.Top, 0, SnapLinePriority.Low));
snapLines.Add( new SnapLine(SnapLineType.Bottom, height-1, SnapLinePriority.Low));
snapLines.Add( new SnapLine(SnapLineType.Left, 0, SnapLinePriority.Low));
snapLines.Add( new SnapLine(SnapLineType.Right, width-1, SnapLinePriority.Low));
//the four margins of our control
// Even if a control does not have margins, we still want to add Margin snaplines.
// This is because we only try to match to matching snaplines. Makes the code a little easier...
snapLines.Add( new SnapLine(SnapLineType.Horizontal, -margin.Top, SnapLine.MarginTop, SnapLinePriority.Always));
snapLines.Add( new SnapLine(SnapLineType.Horizontal, margin.Bottom + height, SnapLine.MarginBottom, SnapLinePriority.Always));
snapLines.Add( new SnapLine(SnapLineType.Vertical, -margin.Left, SnapLine.MarginLeft, SnapLinePriority.Always));
snapLines.Add( new SnapLine(SnapLineType.Vertical, margin.Right + width, SnapLine.MarginRight, SnapLinePriority.Always));
return snapLines;
}
///
/// Returns a list of SnapLine objects representing interesting
/// alignment points for this control. These SnapLines are used
/// to assist in the positioning of the control on a parent's
/// surface.
///
public virtual IList SnapLines {
get {
return SnapLinesInternal();
}
}
///
/// Demand creates the StandardBehavior related to this
/// ControlDesigner. This is used to associate the designer's
/// selection glyphs to a common Behavior (resize in this case).
///
internal virtual System.Windows.Forms.Design.Behavior.Behavior StandardBehavior {
get {
if (resizeBehavior == null) {
resizeBehavior = new ResizeBehavior(Component.Site);
}
return resizeBehavior;
}
}
///
/// Refer VsWhidbey : 487804. There are certain containers (like ToolStrip) that require PerformLayout to be serialized in the code gen.
///
internal virtual bool SerializePerformLayout {
get {
return false;
}
}
internal System.Windows.Forms.Design.Behavior.Behavior MoveBehavior {
get {
if (moveBehavior == null) {
moveBehavior = new ContainerSelectorBehavior(Control, Component.Site);
}
return moveBehavior;
}
}
///
/// Accessor method for the visible property on control. We shadow
/// this property at design time.
///
private bool Visible {
get {
return (bool)ShadowProperties["Visible"];
}
set {
ShadowProperties["Visible"] = value;
}
}
///
/// Default processing for messages. This method causes the message to
/// get processed by windows, skipping the control. This is useful if
/// you want to block this message from getting to the control, but
/// you do not want to block it from getting to Windows itself because
/// it causes other messages to be generated.
///
protected void BaseWndProc(ref Message m) {
m.Result = NativeMethods.DefWindowProc(m.HWnd, m.Msg, m.WParam, m.LParam);
}
internal override bool CanBeAssociatedWith(IDesigner parentDesigner)
{
return CanBeParentedTo(parentDesigner);
}
///
/// Determines if the this designer can be parented to the specified desinger --
/// generally this means if the control for this designer can be parented into the
/// given ParentControlDesigner's designer.
///
public virtual bool CanBeParentedTo(IDesigner parentDesigner) {
ParentControlDesigner p = parentDesigner as ParentControlDesigner;
return (p != null && !Control.Contains(p.Control));
}
private void DataBindingsCollectionChanged(object sender, CollectionChangeEventArgs e) {
// It is possible to use the control designer with NON CONTROl types.
//
Control ctl = Component as Control;
if (ctl != null) {
if (ctl.DataBindings.Count == 0 && removalNotificationHooked) {
// remove the notification for the ComponentRemoved event
IComponentChangeService csc = (IComponentChangeService) GetService(typeof(IComponentChangeService));
if (csc != null) {
csc.ComponentRemoved -= new ComponentEventHandler(DataSource_ComponentRemoved);
}
removalNotificationHooked = false;
}
else if (ctl.DataBindings.Count > 0 && !removalNotificationHooked) {
// add he notification for the ComponentRemoved event
IComponentChangeService csc = (IComponentChangeService) GetService(typeof(IComponentChangeService));
if (csc != null) {
csc.ComponentRemoved += new ComponentEventHandler(DataSource_ComponentRemoved);
}
removalNotificationHooked = true;
}
}
}
private void DataSource_ComponentRemoved(object sender, ComponentEventArgs e) {
// It is possible to use the control designer with NON CONTROl types.
//
Control ctl = Component as Control;
if (ctl != null) {
Debug.Assert(ctl.DataBindings.Count > 0, "we should not be notified if the control has no dataBindings");
ctl.DataBindings.CollectionChanged -= dataBindingsCollectionChanged;
for (int i = 0; i < ctl.DataBindings.Count; i ++) {
Binding binding = ctl.DataBindings[i];
if (binding.DataSource == e.Component) {
// remove the binding from the control's collection
// this will also remove the binding from the bindingManagerBase's bindingscollection
// NOTE: we can't remove the bindingManager from the bindingContext, cause there may
// be some complex bound controls ( such as the dataGrid, or the ComboBox, or the ListBox )
// that still use that bindingManager
ctl.DataBindings.Remove(binding);
}
}
// if after removing those bindings the collection is empty, then
// unhook the changeNotificationService
//
if (ctl.DataBindings.Count == 0) {
IComponentChangeService csc = (IComponentChangeService)GetService(typeof(IComponentChangeService));
if (csc != null) {
csc.ComponentRemoved -= new ComponentEventHandler(DataSource_ComponentRemoved);
}
removalNotificationHooked = false;
}
ctl.DataBindings.CollectionChanged += dataBindingsCollectionChanged;
}
}
///
/// Default processing for messages. This method causes the message to
/// get processed by the control, rather than the designer.
///
protected void DefWndProc(ref Message m) {
designerTarget.DefWndProc(ref m);
}
private void DetachContextMenu(object sender, EventArgs e) {
ContextMenu = null;
}
///
/// Displays the given exception to the user.
///
protected void DisplayError(Exception e) {
IUIService uis = (IUIService)GetService(typeof(IUIService));
if (uis != null) {
uis.ShowError(e);
}
else {
string message = e.Message;
if (message == null || message.Length == 0) {
message = e.ToString();
}
RTLAwareMessageBox.Show(Control, message, null, MessageBoxButtons.OK, MessageBoxIcon.Exclamation,
MessageBoxDefaultButton.Button1, 0);
}
}
///
/// Disposes of this object.
///
protected override void Dispose(bool disposing) {
if (disposing) {
if (Control != null) {
if (dataBindingsCollectionChanged != null) {
Control.DataBindings.CollectionChanged -= dataBindingsCollectionChanged;
}
if (Inherited && inheritanceUI != null) {
inheritanceUI.RemoveInheritedControl(Control);
}
if (removalNotificationHooked) {
IComponentChangeService csc = (IComponentChangeService) GetService(typeof(IComponentChangeService));
if (csc != null) {
csc.ComponentRemoved -= new ComponentEventHandler(DataSource_ComponentRemoved);
}
removalNotificationHooked = false;
}
if (disposingHandler != null) {
disposingHandler(this, EventArgs.Empty);
}
UnhookChildControls(Control);
}
if (ContextMenu != null) {
ContextMenu.Disposed -= new EventHandler(this.DetachContextMenu);
}
if (designerTarget != null) {
designerTarget.Dispose();
}
downPos = Point.Empty;
Control.ControlAdded -= new ControlEventHandler(OnControlAdded);
Control.ControlRemoved -= new ControlEventHandler(OnControlRemoved);
Control.ParentChanged -= new EventHandler(OnParentChanged);
Control.SizeChanged -= new EventHandler(OnSizeChanged);
Control.LocationChanged -= new EventHandler(OnLocationChanged);
Control.EnabledChanged -= new EventHandler(OnEnabledChanged);
}
base.Dispose(disposing);
}
///
/// Enables design time functionality for a child control. The child control is a child
/// of this control designer's control. The child does not directly participate in
/// persistence, but it will if it is exposed as a property of the main control. Consider
/// a control like the SplitContainer: it has two panels, Panel1 and Panel2. These panels
/// are exposed through read only Panel1 and Panel2 properties on the SplitContainer class.
/// SplitContainer's designer calls EnableDesignTime for each panel, which allows other
/// components to be dropped on them. But, in order for the contents of Panel1 and Panel2
/// to be saved, SplitContainer itself needed to expose the panels as public properties.
///
/// The child paramter is the control to enable. The name paramter is the name of this
/// control as exposed to the end user. Names need to be unique within a control designer,
/// but do not have to be unique to other control designer's children.
///
/// This method returns true if the child control could be enabled for design time, or
/// false if the hosting infrastructure does not support it. To support this feature, the
/// hosting infrastructure must expose the INestedContainer class as a service off of the site.
///
protected bool EnableDesignMode(Control child, string name) {
if (child == null) {
throw new ArgumentNullException("child");
}
if (name == null) {
throw new ArgumentNullException("name");
}
INestedContainer nc = GetService(typeof(INestedContainer)) as INestedContainer;
if (nc == null) {
return false;
}
// Only add the child if it doesn't already exist. VSWhidbey #408041.
for (int i = 0; i < nc.Components.Count; i++) {
if (nc.Components[i].Equals(child)) {
return true;
}
}
nc.Add(child, name);
return true;
}
///
/// Enables or disables drag/drop support. This
/// hooks drag event handlers to the control.
///
protected void EnableDragDrop(bool value) {
Control rc = Control;
if (rc == null) {
return;
}
if (value) {
rc.DragDrop += new DragEventHandler(this.OnDragDrop);
rc.DragOver += new DragEventHandler(this.OnDragOver);
rc.DragEnter += new DragEventHandler(this.OnDragEnter);
rc.DragLeave += new EventHandler(this.OnDragLeave);
rc.GiveFeedback += new GiveFeedbackEventHandler(this.OnGiveFeedback);
hadDragDrop = rc.AllowDrop;
if (!hadDragDrop) {
rc.AllowDrop = true;
}
revokeDragDrop = false;
}
else {
rc.DragDrop -= new DragEventHandler(this.OnDragDrop);
rc.DragOver -= new DragEventHandler(this.OnDragOver);
rc.DragEnter -= new DragEventHandler(this.OnDragEnter);
rc.DragLeave -= new EventHandler(this.OnDragLeave);
rc.GiveFeedback -= new GiveFeedbackEventHandler(this.OnGiveFeedback);
if (!hadDragDrop) {
rc.AllowDrop = false;
}
revokeDragDrop = true;
}
}
///
/// Returns a 'BodyGlyph' representing the bounds of this control.
/// The BodyGlyph is responsible for hit testing the related CtrlDes
/// and forwarding messages directly to the designer.
///
protected virtual ControlBodyGlyph GetControlGlyph(GlyphSelectionType selectionType) {
//get the right cursor for this component
OnSetCursor();
Cursor cursor = Cursor.Current;
//get the correctly translated bounds
Rectangle translatedBounds = BehaviorService.ControlRectInAdornerWindow(Control);
//create our glyph, and set its cursor appropriately
ControlBodyGlyph g = null;
Control parent = Control.Parent;
if (parent != null && host != null && host.RootComponent != Component) {
Rectangle parentRect = parent.RectangleToScreen(parent.ClientRectangle);
Rectangle controlRect = Control.RectangleToScreen(Control.ClientRectangle);
if (!parentRect.Contains(controlRect) && !parentRect.IntersectsWith(controlRect)) {
//since the parent is completely clipping the control, the control cannot be a
//drop target, and it will not get mouse messages. So we don't have to give
//the glyph a transparentbehavior (default for ControlBodyGlyph). But we still
//would like to be able to move the control, so push a MoveBehavior. If we didn't
//we wouldn't be able to move the control, since it won't get any mouse messages.
//VS Whidbey# 344888
//VS Whidbey# 399801 - but only do so if the control is selected.
ISelectionService sel = (ISelectionService)GetService(typeof(ISelectionService));
if (sel != null && sel.GetComponentSelected(Control)) {
g = new ControlBodyGlyph(translatedBounds, cursor, Control, MoveBehavior);
}
else if (cursor == Cursors.SizeAll) {
//If we get here, OnSetCursor could have set the cursor to SizeAll. But if we fall
//into this category, we don't have a MoveBehavior, so we don't want to show the
//SizeAll cursor. Let's make sure the cursor is set to the default cursor.
cursor = Cursors.Default;
}
}
}
if (g == null) {
//we are not totally clipped by the parent
g = new ControlBodyGlyph(translatedBounds, cursor, Control, this);
}
return g;
}
internal ControlBodyGlyph GetControlGlyphInternal(GlyphSelectionType selectionType) {
return GetControlGlyph(selectionType);
}
///
/// Returns a collection of Glyph objects representing the selection
/// borders and grab handles for a standard control. Note that
/// based on 'selectionType' the Glyphs returned will either: represent
/// a fully resizeable selection border with grab handles, a locked
/// selection border, or a single 'hidden' selection Glyph.
///
public virtual GlyphCollection GetGlyphs(GlyphSelectionType selectionType) {
GlyphCollection glyphs = new GlyphCollection();
if (selectionType != GlyphSelectionType.NotSelected) {
Rectangle translatedBounds = BehaviorService.ControlRectInAdornerWindow(Control);
bool primarySelection = (selectionType == GlyphSelectionType.SelectedPrimary);
SelectionRules rules = SelectionRules;
if ((Locked) || (InheritanceAttribute == InheritanceAttribute.InheritedReadOnly)) {
// the lock glyph
glyphs.Add(new LockedHandleGlyph(translatedBounds, primarySelection));
//the four locked border glyphs
glyphs.Add(new LockedBorderGlyph(translatedBounds, SelectionBorderGlyphType.Top));
glyphs.Add(new LockedBorderGlyph(translatedBounds, SelectionBorderGlyphType.Bottom));
glyphs.Add(new LockedBorderGlyph(translatedBounds, SelectionBorderGlyphType.Left));
glyphs.Add(new LockedBorderGlyph(translatedBounds, SelectionBorderGlyphType.Right));
}
else if ((rules & SelectionRules.AllSizeable) == SelectionRules.None) {
//the non-resizeable grab handle
glyphs.Add(new NoResizeHandleGlyph(translatedBounds, rules, primarySelection, MoveBehavior));
//the four resizeable border glyphs
glyphs.Add(new NoResizeSelectionBorderGlyph(translatedBounds, rules, SelectionBorderGlyphType.Top, MoveBehavior));
glyphs.Add(new NoResizeSelectionBorderGlyph(translatedBounds, rules, SelectionBorderGlyphType.Bottom, MoveBehavior));
glyphs.Add(new NoResizeSelectionBorderGlyph(translatedBounds, rules, SelectionBorderGlyphType.Left, MoveBehavior));
glyphs.Add(new NoResizeSelectionBorderGlyph(translatedBounds, rules, SelectionBorderGlyphType.Right, MoveBehavior));
// enable the designeractionpanel for this control if it needs one
if (TypeDescriptor.GetAttributes(Component).Contains(DesignTimeVisibleAttribute.Yes) && behaviorService.DesignerActionUI != null) {
Glyph dapGlyph = behaviorService.DesignerActionUI.GetDesignerActionGlyph(Component);
if(dapGlyph!=null) {
glyphs.Insert(0, dapGlyph); //we WANT to be in front of the other UI
}
}
}
else {
//grab handles
if ((rules & SelectionRules.TopSizeable) != 0) {
glyphs.Add(new GrabHandleGlyph(translatedBounds, GrabHandleGlyphType.MiddleTop, StandardBehavior, primarySelection));
if ((rules & SelectionRules.LeftSizeable) != 0) {
glyphs.Add(new GrabHandleGlyph(translatedBounds, GrabHandleGlyphType.UpperLeft, StandardBehavior, primarySelection));
}
if ((rules & SelectionRules.RightSizeable) != 0) {
glyphs.Add(new GrabHandleGlyph(translatedBounds, GrabHandleGlyphType.UpperRight, StandardBehavior, primarySelection));
}
}
if ((rules & SelectionRules.BottomSizeable) != 0) {
glyphs.Add(new GrabHandleGlyph(translatedBounds, GrabHandleGlyphType.MiddleBottom, StandardBehavior, primarySelection));
if ((rules & SelectionRules.LeftSizeable) != 0) {
glyphs.Add(new GrabHandleGlyph(translatedBounds, GrabHandleGlyphType.LowerLeft, StandardBehavior, primarySelection));
}
if ((rules & SelectionRules.RightSizeable) != 0) {
glyphs.Add(new GrabHandleGlyph(translatedBounds, GrabHandleGlyphType.LowerRight, StandardBehavior, primarySelection));
}
}
if ((rules & SelectionRules.LeftSizeable) != 0) {
glyphs.Add(new GrabHandleGlyph(translatedBounds, GrabHandleGlyphType.MiddleLeft, StandardBehavior, primarySelection));
}
if ((rules & SelectionRules.RightSizeable) != 0) {
glyphs.Add(new GrabHandleGlyph(translatedBounds, GrabHandleGlyphType.MiddleRight, StandardBehavior, primarySelection));
}
//the four resizeable border glyphs
glyphs.Add(new SelectionBorderGlyph(translatedBounds, rules, SelectionBorderGlyphType.Top, StandardBehavior));
glyphs.Add(new SelectionBorderGlyph(translatedBounds, rules, SelectionBorderGlyphType.Bottom, StandardBehavior));
glyphs.Add(new SelectionBorderGlyph(translatedBounds, rules, SelectionBorderGlyphType.Left, StandardBehavior));
glyphs.Add(new SelectionBorderGlyph(translatedBounds, rules, SelectionBorderGlyphType.Right, StandardBehavior));
// enable the designeractionpanel for this control if it needs one
if (TypeDescriptor.GetAttributes(Component).Contains(DesignTimeVisibleAttribute.Yes) && behaviorService.DesignerActionUI != null) {
Glyph dapGlyph = behaviorService.DesignerActionUI.GetDesignerActionGlyph(Component);
if(dapGlyph!=null) {
glyphs.Insert(0,dapGlyph); //we WANT to be in front of the other UI
}
}
}
}
return glyphs;
}
///
/// Allows your component to support a design time user interface. A TabStrip
/// control, for example, has a design time user interface that allows the user
/// to click the tabs to change tabs. To implement this, TabStrip returns
/// true whenever the given point is within its tabs.
///
protected virtual bool GetHitTest(Point point) {
return false;
}
///
/// Given an LParam as a parameter, this extracts a point in parent
/// coordinates.
///
private int GetParentPointFromLparam(IntPtr lParam) {
Point pt = new Point(NativeMethods.Util.SignedLOWORD((int)lParam), NativeMethods.Util.SignedHIWORD((int)lParam));
pt = Control.PointToScreen(pt);
pt = Control.Parent.PointToClient(pt);
return NativeMethods.Util.MAKELONG(pt.X, pt.Y);
}
///
/// Hooks the children of the given control. We need to do this for
/// child controls that are not in design mode, which is the case
/// for composite controls.
///
protected void HookChildControls(Control firstChild) {
foreach(Control child in firstChild.Controls) {
if (child != null && host != null) {
if (!(host.GetDesigner(child) is ControlDesigner)) {
// No, no designer means we must replace the window target in this
// control.
//
IWindowTarget oldTarget = child.WindowTarget;
if (!(oldTarget is ChildWindowTarget)) {
child.WindowTarget = new ChildWindowTarget(this, child, oldTarget);
}
// ASURT 45655: Some controls (primarily RichEdit) will register themselves as
// drag-drop source/targets when they are instantiated. We have to RevokeDragDrop()
// for them so that the ParentControlDesigner()'s drag-drop support can work
// correctly. Normally, the hwnd for the child control is not created at this time,
// and we will use the WM_CREATE message in ChildWindowTarget's WndProc() to revoke
// drag-drop. But, if the handle was already created for some reason, we will need
// to revoke drag-drop right away.
//
if (child.IsHandleCreated) {
Application.OleRequired();
NativeMethods.RevokeDragDrop(child.Handle);
HookChildHandles(child.Handle);
}
else {
child.HandleCreated += delegate(object sender, EventArgs e) {
HookChildHandles(child.Handle);
};
}
// We only hook the children's children if there was no designer.
// We leave it up to the designer to hook its own children.
//
HookChildControls(child);
}
}
}
}
private int CurrentProcessId {
get {
if (currentProcessId == 0) {
currentProcessId = SafeNativeMethods.GetCurrentProcessId();
}
return currentProcessId;
}
}
private bool IsWindowInCurrentProcess(IntPtr hwnd) {
int pid;
UnsafeNativeMethods.GetWindowThreadProcessId(new HandleRef(null, hwnd), out pid);
return pid == CurrentProcessId;
}
///
/// Hooks the peer handles of the given child control. We need
/// to do this to handle windows that are not associated with
/// a control (such as the combo box edit), and for controls
/// that are not in design mode (such as child controls on a
/// user control).
///
[SuppressMessage("Microsoft.Performance", "CA1806:DoNotIgnoreMethodResults")]
internal void HookChildHandles(IntPtr firstChild) {
IntPtr hwndChild = firstChild;
while (hwndChild != IntPtr.Zero) {
if (!IsWindowInCurrentProcess(hwndChild)) {
break;
}
// Is it a control?
//
Control child = Control.FromHandle(hwndChild);
if (child == null) {
// No control. We must subclass this control.
//
if (!SubclassedChildWindows.ContainsKey(hwndChild)) {
// ASURT 45655: Some controls (primarily RichEdit) will register themselves as
// drag-drop source/targets when they are instantiated. Since these hwnds do not
// have a Windows Forms control associated with them, we have to RevokeDragDrop()
// for them so that the ParentControlDesigner()'s drag-drop support can work
// correctly.
//
NativeMethods.RevokeDragDrop(hwndChild);
new ChildSubClass(this, hwndChild);
SubclassedChildWindows[hwndChild] = true;
}
}
// UserControl is a special ContainerControl which should "hook to all the WindowHandles"
// Since it doesnt allow the Mouse to pass through any of its contained controls.
// Please refer to VsWhidbey : 293117
if (child == null || Control is UserControl)
{
// Now do the children of this window.
//
HookChildHandles(NativeMethods.GetWindow(hwndChild, NativeMethods.GW_CHILD));
}
hwndChild = NativeMethods.GetWindow(hwndChild, NativeMethods.GW_HWNDNEXT);
}
}
internal void RemoveSubclassedWindow(IntPtr hwnd) {
if (SubclassedChildWindows.ContainsKey(hwnd)) {
SubclassedChildWindows.Remove(hwnd);
}
}
///
/// Called by the host when we're first initialized.
///
public override void Initialize(IComponent component) {
// Visibility works as follows: If the control's property is not actually set, then
// set our shadow to true. Otherwise, grab the shadow value from the control directly and
// then set the control to be visible if it is not the root component. Root components
// will be set to visible = true in their own time by the view.
//
PropertyDescriptorCollection props = TypeDescriptor.GetProperties(component.GetType());
PropertyDescriptor visibleProp = props["Visible"];
if (visibleProp == null || visibleProp.PropertyType != typeof(bool) || !visibleProp.ShouldSerializeValue(component))
{
Visible = true;
}
else
{
Visible = (bool)visibleProp.GetValue(component);
}
PropertyDescriptor enabledProp = props["Enabled"];
if (enabledProp == null || enabledProp.PropertyType != typeof(bool) || !enabledProp.ShouldSerializeValue(component))
{
Enabled = true;
}
else
{
Enabled = (bool)enabledProp.GetValue(component);
}
initializing = true;
base.Initialize(component);
initializing = false;
// And get other commonly used services.
//
host = (IDesignerHost)GetService(typeof(IDesignerHost));
// this is to create the action in the DAP for this component if it requires docking/undocking logic
AttributeCollection attributes = TypeDescriptor.GetAttributes(Component);
DockingAttribute dockingAttribute = (DockingAttribute)attributes[typeof(DockingAttribute)];
if (dockingAttribute != null && dockingAttribute.DockingBehavior != DockingBehavior.Never) {
// create the action for this control
dockingAction = new DockingActionList(this);
//add our 'dock in parent' or 'undock in parent' action
DesignerActionService das = GetService(typeof(DesignerActionService)) as DesignerActionService;
if (das != null) {
das.Add(Component, dockingAction);
}
}
// Hook up the property change notifications we need to track. One for data binding.
// More for control add / remove notifications
//
dataBindingsCollectionChanged = new CollectionChangeEventHandler(DataBindingsCollectionChanged);
Control.DataBindings.CollectionChanged += dataBindingsCollectionChanged;
Control.ControlAdded += new ControlEventHandler(OnControlAdded);
Control.ControlRemoved += new ControlEventHandler(OnControlRemoved);
Control.ParentChanged += new EventHandler(OnParentChanged);
Control.SizeChanged += new EventHandler(OnSizeChanged);
Control.LocationChanged += new EventHandler(OnLocationChanged);
// Replace the control's window target with our own. This
// allows us to hook messages.
//
this.DesignerTarget = new DesignerWindowTarget(this);
// If the handle has already been created for this control, invoke OnCreateHandle so we
// can hookup our child control subclass.
//
if (Control.IsHandleCreated) {
OnCreateHandle();
}
// If we are an inherited control, notify our inheritance UI
//
if (Inherited && host != null && host.RootComponent != component) {
inheritanceUI = (InheritanceUI)GetService(typeof(InheritanceUI));
if (inheritanceUI != null) {
inheritanceUI.AddInheritedControl(Control, InheritanceAttribute.InheritanceLevel);
}
}
// When we drag one control from one form to another, we will end up here.
// In this case we do not want to set the control to visible, so check ForceVisible.
if ((host == null || host.RootComponent != component) && ForceVisible) {
Control.Visible = true;
}
// Always make controls enabled, event inherited ones. Otherwise we won't be able
// to select them.
//
Control.Enabled = true;
//we move enabledchanged below the set to avoid any possible stack overflows.
//this can occur if the parent is not enabled when we set enabled to true.
//see VS#538084
Control.EnabledChanged += new EventHandler(OnEnabledChanged);
// And force some shadow properties that we change in the course of
// initializing the form.
//
AllowDrop = Control.AllowDrop;
// update the Status Command
statusCommandUI = new StatusCommandUI(component.Site);
}
///
/// ControlDesigner overrides this method to handle after-drop cases.
///
public override void InitializeExistingComponent(IDictionary defaultValues) {
base.InitializeExistingComponent(defaultValues);
// unhook any sited children that got ChildWindowTargets
foreach (Control c in Control.Controls) {
if (c != null) {
ISite site = c.Site;
ChildWindowTarget target = c.WindowTarget as ChildWindowTarget;
if (site != null && target != null) {
c.WindowTarget = target.OldWindowTarget;
}
}
}
}
///
/// ControlDesigner overrides this method. It will look at the default property for the control and,
/// if it is of type string, it will set this property's value to the name of the component. It only
/// does this if the designer has been configured with this option in the options service. This method
/// also connects the control to its parent and positions it. If you override this method, you should
/// always call base.
///
public override void InitializeNewComponent(IDictionary defaultValues) {
ISite site = Component.Site;
if (site != null) {
PropertyDescriptor textProp = TypeDescriptor.GetProperties(Component)["Text"];
if (textProp != null && textProp.PropertyType == typeof(string) && !textProp.IsReadOnly && textProp.IsBrowsable) {
textProp.SetValue(Component, site.Name);
}
}
if (defaultValues != null) {
IComponent parent = defaultValues["Parent"] as IComponent;
IDesignerHost host = GetService(typeof(IDesignerHost)) as IDesignerHost;
if (parent != null && host != null) {
ParentControlDesigner parentDesigner = host.GetDesigner(parent) as ParentControlDesigner;
if (parentDesigner != null) {
parentDesigner.AddControl(Control, defaultValues);
}
Control parentControl = parent as Control;
if (parentControl != null) {
//
// Some containers are docked differently (instead of DockStyle.None) when
// they are added through the designer
//
AttributeCollection attributes = TypeDescriptor.GetAttributes(Component);
DockingAttribute dockingAttribute = (DockingAttribute)attributes[typeof(DockingAttribute)];
if (dockingAttribute != null && dockingAttribute.DockingBehavior != DockingBehavior.Never) {
if (dockingAttribute.DockingBehavior == DockingBehavior.AutoDock) {
bool onlyNonDockedChild = true;
foreach (Control c in parentControl.Controls) {
if (c != Control && c.Dock == DockStyle.None) {
onlyNonDockedChild = false;
break;
}
}
if (onlyNonDockedChild) {
PropertyDescriptor dockProp = TypeDescriptor.GetProperties(Component)["Dock"];
if (dockProp != null && dockProp.IsBrowsable) {
dockProp.SetValue(Component, DockStyle.Fill);
}
}
}
}
}
}
}
// Finally, call base. Base simply calls OnSetComponentDefaults to preserve old behavior.
base.InitializeNewComponent(defaultValues);
}
///
/// Called when the designer is intialized. This allows the designer to provide some
/// meaningful default values in the component. The default implementation of this
/// sets the components's default property to it's name, if that property is a string.
///
[Obsolete("This method has been deprecated. Use InitializeNewComponent instead. http://go.microsoft.com/fwlink/?linkid=14202")]
public override void OnSetComponentDefaults() {
// COMPAT: The following code shipped in Everett, so we need to continue to do this.
// See VSWhidbey #467460 for details.
// Don't call base.
//
ISite site = Component.Site;
if (site != null) {
PropertyDescriptor textProp = TypeDescriptor.GetProperties(Component)["Text"];
if (textProp != null && textProp.IsBrowsable) {
textProp.SetValue(Component, site.Name);
}
}
}
///
/// Determines if the given mouse click is a double click or not. We must
/// handle this ourselves for controls that don't have the CS_DOUBLECLICKS style
/// set.
///
private bool IsDoubleClick(int x, int y) {
bool doubleClick = false;
int wait = SystemInformation.DoubleClickTime;
int elapsed = SafeNativeMethods.GetTickCount() - lastClickMessageTime;
if (elapsed <= wait) {
Size dblClick = SystemInformation.DoubleClickSize;
if (x >= lastClickMessagePositionX - dblClick.Width
&& x <= lastClickMessagePositionX + dblClick.Width
&& y >= lastClickMessagePositionY - dblClick.Height
&& y <= lastClickMessagePositionY + dblClick.Height) {
doubleClick = true;
}
}
if (!doubleClick) {
lastClickMessagePositionX = x;
lastClickMessagePositionY = y;
lastClickMessageTime = SafeNativeMethods.GetTickCount();
}
else {
lastClickMessagePositionX = lastClickMessagePositionY = 0;
lastClickMessageTime = 0;
}
return doubleClick;
}
private bool IsMouseMessage(int msg) {
if (msg >= NativeMethods.WM_MOUSEFIRST && msg <= NativeMethods.WM_MOUSELAST) {
return true;
}
switch (msg) {
// WM messages not covered by the above block
case NativeMethods.WM_MOUSEHOVER:
case NativeMethods.WM_MOUSELEAVE:
// WM_NC messages
case NativeMethods.WM_NCMOUSEMOVE:
case NativeMethods.WM_NCLBUTTONDOWN:
case NativeMethods.WM_NCLBUTTONUP:
case NativeMethods.WM_NCLBUTTONDBLCLK:
case NativeMethods.WM_NCRBUTTONDOWN:
case NativeMethods.WM_NCRBUTTONUP:
case NativeMethods.WM_NCRBUTTONDBLCLK:
case NativeMethods.WM_NCMBUTTONDOWN:
case NativeMethods.WM_NCMBUTTONUP:
case NativeMethods.WM_NCMBUTTONDBLCLK:
case NativeMethods.WM_NCMOUSEHOVER:
case NativeMethods.WM_NCMOUSELEAVE:
case NativeMethods.WM_NCXBUTTONDOWN:
case NativeMethods.WM_NCXBUTTONUP:
case NativeMethods.WM_NCXBUTTONDBLCLK:
return true;
default:
return false;
}
}
///
/// Called when the context menu should be displayed
///
protected virtual void OnContextMenu(int x, int y) {
ShowContextMenu(x, y);
}
///
/// Called in response to a new control being added to this designer's control.
/// We check to see if the control has an associated ControlDesigner. If it
/// doesn't, we hook its window target so we can sniff messages and make
/// it ui inactive.
///
private void OnControlAdded(object sender, ControlEventArgs e) {
if (e.Control != null && host != null) {
if (!(host.GetDesigner(e.Control) is ControlDesigner)) {
// No, no designer means we must replace the window target in this
// control.
//
IWindowTarget oldTarget = e.Control.WindowTarget;
if (!(oldTarget is ChildWindowTarget)) {
e.Control.WindowTarget = new ChildWindowTarget(this, e.Control, oldTarget);
}
// ASURT 45655: Some controls (primarily RichEdit) will register themselves as
// drag-drop source/targets when they are instantiated. We have to RevokeDragDrop()
// for them so that the ParentControlDesigner()'s drag-drop support can work
// correctly. Normally, the hwnd for the child control is not created at this time,
// and we will use the WM_CREATE message in ChildWindowTarget's WndProc() to revoke
// drag-drop. But, if the handle was already created for some reason, we will need
// to revoke drag-drop right away.
//
if (e.Control.IsHandleCreated) {
Application.OleRequired();
NativeMethods.RevokeDragDrop(e.Control.Handle);
// We only hook the control's children if there was no designer.
// We leave it up to the designer to hook its own children.
//
HookChildControls(e.Control);
}
}
}
}
///
/// Called in response to a control being removed from this designer's control.
/// If we previously changed out this control's window target, we undo that
/// work here.
///
private void OnControlRemoved(object sender, ControlEventArgs e) {
if (e.Control != null) {
// No, no designer means we must replace the window target in this
// control.
//
ChildWindowTarget oldTarget = e.Control.WindowTarget as ChildWindowTarget;
if (oldTarget != null) {
e.Control.WindowTarget = oldTarget.OldWindowTarget;
}
UnhookChildControls(e.Control);
}
}
///
/// This is called immediately after the control handle has been created.
///
protected virtual void OnCreateHandle() {
OnHandleChange();
if (revokeDragDrop) {
int n = NativeMethods.RevokeDragDrop(Control.Handle);
}
}
///
/// Event handler for our drag enter event. The host will call us with
/// this when an OLE drag event happens.
///
private void OnDragEnter(object s, DragEventArgs e) {
if (BehaviorService != null) {
//Tell the BehaviorService to monitor mouse messages
//so it can send appropriate drag notifications.
//
BehaviorService.StartDragNotification();
}
OnDragEnter(e);
}
///
/// Called when a drag-drop operation enters the control designer view
///
///
protected virtual void OnDragEnter(DragEventArgs de) {
// unhook our events - we don't want to create an infinite loop.
Control control = Control;
DragEventHandler handler = new DragEventHandler(this.OnDragEnter);
control.DragEnter -= handler;
((IDropTarget)Control).OnDragEnter(de);
control.DragEnter += handler;
}
///
/// Event handler for our drag drop event. The host will call us with
/// this when an OLE drag event happens.
///
private void OnDragDrop(object s, DragEventArgs e) {
if (BehaviorService != null) {
//this will cause the BehSvc to return from 'drag mode'
//
BehaviorService.EndDragNotification();
}
OnDragDrop(e);
}
///
/// Called to cleanup a D&D operation
///
protected virtual void OnDragComplete(DragEventArgs de) {
// default implementation - does nothing.
}
///
/// Called when a drag drop object is dropped onto the control designer view
///
protected virtual void OnDragDrop(DragEventArgs de) {
// unhook our events - we don't want to create an infinite loop.
Control control = Control;
DragEventHandler handler = new DragEventHandler(this.OnDragDrop);
control.DragDrop -= handler;
((IDropTarget)Control).OnDragDrop(de);
control.DragDrop += handler;
OnDragComplete(de);
}
///
/// Event handler for our drag leave event. The host will call us with
/// this when an OLE drag event happens.
///
private void OnDragLeave(object s, EventArgs e) {
OnDragLeave(e);
}
///
/// Called when a drag-drop operation leaves the control designer view
///
///
protected virtual void OnDragLeave(EventArgs e) {
// unhook our events - we don't want to create an infinite loop.
Control control = Control;
EventHandler handler = new EventHandler(this.OnDragLeave);
control.DragLeave -= handler;
((IDropTarget)Control).OnDragLeave(e);
control.DragLeave += handler;
}
///
/// Event handler for our drag over event. The host will call us with
/// this when an OLE drag event happens.
///
private void OnDragOver(object s, DragEventArgs e) {
OnDragOver(e);
}
///
/// Called when a drag drop object is dragged over the control designer view
///
protected virtual void OnDragOver(DragEventArgs de) {
// unhook our events - we don't want to create an infinite loop.
Control control = Control;
DragEventHandler handler = new DragEventHandler(this.OnDragOver);
control.DragOver -= handler;
((IDropTarget)Control).OnDragOver(de);
control.DragOver += handler;
}
///
/// Event handler for our GiveFeedback event, which is called when a drag operation
/// is in progress. The host will call us with
/// this when an OLE drag event happens.
///
private void OnGiveFeedback(object s, GiveFeedbackEventArgs e) {
OnGiveFeedback(e);
}
///
/// Event handler for our GiveFeedback event, which is called when a drag operation
/// is in progress. The host will call us with
/// this when an OLE drag event happens.
///
protected virtual void OnGiveFeedback(GiveFeedbackEventArgs e) {
}
///
/// This is called whenever the control handle changes.
///
private void OnHandleChange() {
// We must now traverse child handles for this control. There are
// three types of child handles and we are interested in two of
// them:
//
// 1. Child handles that do not have a Control associated
// with them. We must subclass these and prevent them
// from getting design-time events.
//
// 2. Child handles that do have a Control associated
// with them, but the control does not have a designer.
// We must hook the WindowTarget on these controls and
// prevent them from getting design-time events.
//
// 3. Child handles that do have a Control associated
// with them, and the control has a designer. We
// ignore these and let the designer handle their
// messages.
//
HookChildHandles(NativeMethods.GetWindow(Control.Handle, NativeMethods.GW_CHILD));
HookChildControls(Control);
}
///
/// Called in response to a double-click of the left mouse button. We
/// Just call this on the event service
///
private void OnMouseDoubleClick() {
try {
DoDefaultAction();
}
catch (Exception e) {
DisplayError(e);
if (ClientUtils.IsCriticalException(e)) {
throw;
}
}
catch {
}
}
///
/// Called in response to the left mouse button being pressed on a
/// component. It ensures that the component is selected.
///
protected virtual void OnMouseDragBegin(int x, int y) {
// Ignore another mouse down if we are already in a drag.
//
if (BehaviorService == null && mouseDragLast != InvalidPoint) {
return;
}
mouseDragLast = new Point(x, y);
ctrlSelect = (Control.ModifierKeys & Keys.Control) != 0;
ISelectionService sel = (ISelectionService)GetService(typeof(ISelectionService));
// If the CTRL key isn't down, select this component,
// otherwise, we wait until the mouse up
//
// Make sure the component is selected
//
if (!ctrlSelect && sel != null) {
sel.SetSelectedComponents(new object[] {Component}, SelectionTypes.Primary);
}
Control.Capture = true;
}
///
/// Called at the end of a drag operation. This either commits or rolls back the
/// drag.
///
protected virtual void OnMouseDragEnd(bool cancel) {
mouseDragLast = InvalidPoint;
Control.Capture = false;
if (!mouseDragMoved) {
if (!cancel) {
ISelectionService sel = (ISelectionService)GetService(typeof(ISelectionService));
bool shiftSelect = (Control.ModifierKeys & Keys.Shift) != 0;
if (!shiftSelect && (ctrlSelect || (sel != null && !sel.GetComponentSelected(Component)))) {
if (sel != null) {
sel.SetSelectedComponents(new object[] {Component}, SelectionTypes.Primary);
}
ctrlSelect = false;
}
}
return;
}
mouseDragMoved = false;
ctrlSelect = false;
// And now finish the drag.
if (BehaviorService != null && BehaviorService.Dragging && cancel) {
BehaviorService.CancelDrag = true;
}
// Leave this here in case we are doing a ComponentTray drag
if (selectionUISvc == null) {
selectionUISvc = (ISelectionUIService)GetService(typeof(ISelectionUIService));
}
if (selectionUISvc == null) {
return;
}
// We must check to ensure that UI service is still in drag mode. It is
// possible that the user hit escape, which will cancel drag mode.
//
if (selectionUISvc.Dragging) {
selectionUISvc.EndDrag(cancel);
}
}
///
/// Called for each movement of the mouse. This will check to see if a drag operation
/// is in progress. If so, it will pass the updated drag dimensions on to the selection
/// UI service.
///
protected virtual void OnMouseDragMove(int x, int y) {
if (!mouseDragMoved) {
Size minDrag = SystemInformation.DragSize;
Size minDblClick = SystemInformation.DoubleClickSize;
minDrag.Width = Math.Max(minDrag.Width, minDblClick.Width);
minDrag.Height = Math.Max(minDrag.Height, minDblClick.Height);
// we have to make sure the mouse moved farther than
// the minimum drag distance before we actually start
// the drag
//
if (mouseDragLast == InvalidPoint ||
(Math.Abs(mouseDragLast.X - x) < minDrag.Width &&
Math.Abs(mouseDragLast.Y - y) < minDrag.Height)) {
return;
}
else {
mouseDragMoved = true;
// we're on the move, so we're not in a ctrlSelect
//
ctrlSelect = false;
}
}
// Make sure the component is selected
//
// VSWhidbey #461078
// But only select it if it is not already the primary selection, and we want to toggle
// the current primary selection.
ISelectionService sel = (ISelectionService)GetService(typeof(ISelectionService));
if (sel != null && !Component.Equals(sel.PrimarySelection)) {
sel.SetSelectedComponents(new object[] {Component}, SelectionTypes.Primary | SelectionTypes.Toggle);
}
if (BehaviorService != null && sel != null) {
//create our list of controls-to-drag
ArrayList dragControls = new ArrayList();
ICollection selComps = sel.GetSelectedComponents();
//must identify a required parent to avoid dragging mixes of children
Control requiredParent = null;
foreach (IComponent comp in selComps) {
Control control = comp as Control;
if (control != null) {
if (requiredParent == null) {
requiredParent = control.Parent;
}
else if (!requiredParent.Equals(control.Parent)) {
continue;//mixed selection of different parents - don't add this
}
ControlDesigner des = host.GetDesigner(comp) as ControlDesigner;
if (des != null && (des.SelectionRules & SelectionRules.Moveable) != 0) {
dragControls.Add(comp);
}
}
}
//if we have controls-to-drag, create our new behavior
//and start the drag/drop operation
if (dragControls.Count > 0) {
using (Graphics adornerGraphics = BehaviorService.AdornerWindowGraphics) {
DropSourceBehavior dsb = new DropSourceBehavior(dragControls, Control.Parent, mouseDragLast);
BehaviorService.DoDragDrop(dsb);
}
}
}
mouseDragLast = InvalidPoint;
mouseDragMoved = false;
}
///
/// Called when the mouse first enters the control. This is forwarded to the parent
/// designer to enable the container selector.
///
protected virtual void OnMouseEnter() {
Control ctl = Control;
Control parent = ctl;
object parentDesigner = null;
while (parentDesigner == null && parent != null) {
parent = parent.Parent;
if (parent != null) {
object d = host.GetDesigner(parent);
if (d != this) {
parentDesigner = d;
}
}
}
ControlDesigner cd = parentDesigner as ControlDesigner;
if (cd != null) {
cd.OnMouseEnter();
}
}
///
/// Called after the mouse hovers over the control. This is forwarded to the parent
/// designer to enabled the container selector.
///
protected virtual void OnMouseHover() {
Control ctl = Control;
Control parent = ctl;
object parentDesigner = null;
while (parentDesigner == null && parent != null) {
parent = parent.Parent;
if (parent != null) {
object d = host.GetDesigner(parent);
if (d != this) {
parentDesigner = d;
}
}
}
ControlDesigner cd = parentDesigner as ControlDesigner;
if (cd != null) {
cd.OnMouseHover();
}
}
///
/// Called when the mouse first enters the control. This is forwarded to the parent
/// designer to enable the container selector.
///
protected virtual void OnMouseLeave() {
Control ctl = Control;
Control parent = ctl;
object parentDesigner = null;
while (parentDesigner == null && parent != null) {
parent = parent.Parent;
if (parent != null) {
object d = host.GetDesigner(parent);
if (d != this) {
parentDesigner = d;
}
}
}
ControlDesigner cd = parentDesigner as ControlDesigner;
if (cd != null) {
cd.OnMouseLeave();
}
}
///
/// Called when the control we're designing has finished painting. This method
/// gives the designer a chance to paint any additional adornments on top of the
/// control.
///
protected virtual void OnPaintAdornments(PaintEventArgs pe) {
// If this control is being inherited, paint it
//
if (inheritanceUI != null && pe.ClipRectangle.IntersectsWith(inheritanceUI.InheritanceGlyphRectangle)) {
pe.Graphics.DrawImage(inheritanceUI.InheritanceGlyph, 0, 0);
}
}
private void OnParentChanged(object sender, EventArgs e) {
if (Control.IsHandleCreated) {
OnHandleChange();
}
}
// VSWhidbey #245901
// HACK HACK
// This is a workaround to some problems with the ComponentCache that we should fix.
// When this is removed remember to change ComponentCache's RemoveEntry method back to private (from internal).
private void OnSizeChanged(object sender, EventArgs e) {
System.ComponentModel.Design.Serialization.ComponentCache cache =
(System.ComponentModel.Design.Serialization.ComponentCache) GetService(typeof(System.ComponentModel.Design.Serialization.ComponentCache));
object component = Component;
if (cache != null && component != null) {
cache.RemoveEntry(component);
}
}
private void OnLocationChanged(object sender, EventArgs e) {
System.ComponentModel.Design.Serialization.ComponentCache cache =
(System.ComponentModel.Design.Serialization.ComponentCache) GetService(typeof(System.ComponentModel.Design.Serialization.ComponentCache));
object component = Component;
if (cache != null && component != null) {
cache.RemoveEntry(component);
}
}
private void OnEnabledChanged(object sender, EventArgs e) {
// VSWhidbey #154310 - Never allow controls to be disabled at design time.
if (!enabledchangerecursionguard) {
enabledchangerecursionguard = true;
try {
Control.Enabled = true;
}
finally {
enabledchangerecursionguard = false;
}
}
}
///
/// Called each time the cursor needs to be set. The ControlDesigner behavior here
/// will set the cursor to one of three things:
/// 1. If the toolbox service has a tool selected, it will allow the toolbox service to
/// set the cursor.
/// 2. If the selection UI service shows a locked selection, or if there is no location
/// property on the control, then the default arrow will be set.
/// 3. Otherwise, the four headed arrow will be set to indicate that the component can
/// be clicked and moved.
/// 4. If the user is currently dragging a component, the crosshair cursor will be used
/// instead of the four headed arrow.
///
protected virtual void OnSetCursor() {
if (Control.Dock != DockStyle.None) {
Cursor.Current = Cursors.Default;
}
else {
if (toolboxSvc == null) {
toolboxSvc = (IToolboxService)GetService(typeof(IToolboxService));
}
if (toolboxSvc != null && toolboxSvc.SetCursor()) {
return;
}
if (!locationChecked) {
locationChecked = true;
try {
hasLocation = TypeDescriptor.GetProperties(Component)["Location"] != null;
}
catch {
}
}
if (!hasLocation) {
Cursor.Current = Cursors.Default;
return;
}
if (Locked) {
Cursor.Current = Cursors.Default;
return;
}
Cursor.Current = Cursors.SizeAll;
}
}
///
/// Paints a red rectangle with a red X, painted on a white background. Used
/// when the control has thrown an exception.
///
private void PaintException(PaintEventArgs e, Exception ex) {
StringFormat stringFormat = new StringFormat();
stringFormat.Alignment = StringAlignment.Near;
stringFormat.LineAlignment = StringAlignment.Near;
string exceptionText = ex.ToString();
stringFormat.SetMeasurableCharacterRanges(new CharacterRange[] {new CharacterRange(0, exceptionText.Length)});
// rendering calculations...
//
int penThickness = 2;
Size glyphSize = SystemInformation.IconSize;
int marginX = penThickness * 2;
int marginY = penThickness * 2;
Rectangle clientRectangle = Control.ClientRectangle;
Rectangle borderRectangle = clientRectangle;
borderRectangle.X++;
borderRectangle.Y++;
borderRectangle.Width -=2;
borderRectangle.Height-=2;
Rectangle imageRect = new Rectangle(marginX, marginY, glyphSize.Width, glyphSize.Height);
Rectangle textRect = clientRectangle;
textRect.X = imageRect.X + imageRect.Width + 2 * marginX;
textRect.Y = imageRect.Y;
textRect.Width -= (textRect.X + marginX + penThickness);
textRect.Height -= (textRect.Y + marginY + penThickness);
using (Font errorFont = new Font(Control.Font.FontFamily, Math.Max(SystemInformation.ToolWindowCaptionHeight - SystemInformation.BorderSize.Height - 2, Control.Font.Height), GraphicsUnit.Pixel)) {
using(Region textRegion = e.Graphics.MeasureCharacterRanges(exceptionText, errorFont, textRect, stringFormat)[0]) {
// paint contents... clipping optimizations for less flicker...
//
Region originalClip = e.Graphics.Clip;
e.Graphics.ExcludeClip(textRegion);
e.Graphics.ExcludeClip(imageRect);
try {
e.Graphics.FillRectangle(Brushes.White, clientRectangle);
}
finally {
e.Graphics.Clip = originalClip;
}
using (Pen pen = new Pen(Color.Red, penThickness)) {
e.Graphics.DrawRectangle(pen, borderRectangle);
}
Icon err = SystemIcons.Error;
e.Graphics.FillRectangle(Brushes.White, imageRect);
e.Graphics.DrawIcon(err, imageRect.X, imageRect.Y);
textRect.X++;
e.Graphics.IntersectClip(textRegion);
try {
e.Graphics.FillRectangle(Brushes.White, textRect);
e.Graphics.DrawString(exceptionText, errorFont, new SolidBrush(Control.ForeColor), textRect, stringFormat);
}
finally {
e.Graphics.Clip = originalClip;
}
}
}
}
///
/// Allows a designer to filter the set of properties
/// the component it is designing will expose through the
/// TypeDescriptor object. This method is called
/// immediately before its corresponding "Post" method.
/// If you are overriding this method you should call
/// the base implementation before you perform your own
/// filtering.
///
protected override void PreFilterProperties(IDictionary properties) {
base.PreFilterProperties(properties);
PropertyDescriptor prop;
// Handle shadowed properties
//
string[] shadowProps = new string[] {
"Visible",
"Enabled",
"ContextMenu",
"AllowDrop",
"Location",
"Name"
};
Attribute[] empty = new Attribute[0];
for (int i = 0; i < shadowProps.Length; i++) {
prop = (PropertyDescriptor)properties[shadowProps[i]];
if (prop != null) {
properties[shadowProps[i]] = TypeDescriptor.CreateProperty(typeof(ControlDesigner), prop, empty);
}
}
// replace this one seperately because it is of a different type (DesignerControlCollection) than
// the original property (ControlCollection)
//
PropertyDescriptor controlsProp = (PropertyDescriptor)properties["Controls"];
if (controlsProp != null) {
Attribute[] attrs = new Attribute[controlsProp.Attributes.Count];
controlsProp.Attributes.CopyTo(attrs, 0);
properties["Controls"] = TypeDescriptor.CreateProperty(typeof(ControlDesigner), "Controls", typeof(DesignerControlCollection), attrs);
}
PropertyDescriptor sizeProp = (PropertyDescriptor)properties["Size"];
if (sizeProp != null) {
properties["Size"] = new CanResetSizePropertyDescriptor(sizeProp);
}
// Now we add our own design time properties.
//
properties["Locked"] = TypeDescriptor.CreateProperty(typeof(ControlDesigner), "Locked", typeof(bool),
new DefaultValueAttribute(false),
BrowsableAttribute.Yes,
CategoryAttribute.Design,
DesignOnlyAttribute.Yes,
new SRDescriptionAttribute(SR.lockedDescr));
}
///
/// Returns true if the visible property should be persisted in code gen.
///
private void ResetVisible() {
Visible = true;
}
///
/// Returns true if the Enabled property should be persisted in code gen.
///
private void ResetEnabled() {
Enabled = true;
}
///
/// Sets an unhandled exception that is raised from a control or child control wndproc.
///
internal void SetUnhandledException(Control owner, Exception exception) {
if (thrownException == null) {
thrownException = exception;
if (owner == null) {
owner = Control;
}
string stack = string.Empty;
string[] exceptionLines = exception.StackTrace.Split('\r', '\n');
string typeName = owner.GetType().FullName;
foreach(string line in exceptionLines) {
if (line.IndexOf(typeName) != -1) {
stack = string.Format(CultureInfo.CurrentCulture, "{0}\r\n{1}", stack, line);
}
}
Exception wrapper = new Exception(SR.GetString(SR.ControlDesigner_WndProcException, typeName, exception.Message, stack), exception);
DisplayError(wrapper);
// hide all the child controls.
//
foreach (Control c in Control.Controls) {
c.Visible = false;
}
Control.Invalidate(true);
}
}
private bool ShouldSerializeAllowDrop() {
return AllowDrop != hadDragDrop;
}
///
/// Returns true if the enabled property should be persisted in code gen.
///
private bool ShouldSerializeEnabled() {
return ShadowProperties.ShouldSerializeValue("Enabled", true);
}
///
/// Returns true if the visible property should be persisted in code gen.
///
private bool ShouldSerializeVisible() {
return ShadowProperties.ShouldSerializeValue("Visible", true);
}
private bool ShouldSerializeName() {
IDesignerHost host = (IDesignerHost)GetService(typeof(IDesignerHost));
Debug.Assert(host != null);
return initializing ? (Component != host.RootComponent) //for non root components, respect the name that the base Control serialized unless changed
: ShadowProperties.ShouldSerializeValue("Name", null);
}
///
/// Hooks the children of the given control. We need to do this for
/// child controls that are not in design mode, which is the case
/// for composite controls.
///
protected void UnhookChildControls(Control firstChild) {
if (host == null) {
host = (IDesignerHost)GetService(typeof(IDesignerHost));
}
foreach(Control child in firstChild.Controls) {
IWindowTarget oldTarget = null;
if (child != null) {
// No, no designer means we must replace the window target in this
// control.
//
oldTarget= child.WindowTarget;
ChildWindowTarget target = oldTarget as ChildWindowTarget;
if (target != null) {
child.WindowTarget = target.OldWindowTarget;
}
}
if (!(oldTarget is DesignerWindowTarget)) {
UnhookChildControls(child);
}
}
}
///
/// This method should be called by the extending designer for each message
/// the control would normally receive. This allows the designer to pre-process
/// messages before allowing them to be routed to the control.
///
protected virtual void WndProc(ref Message m) {
IMouseHandler mouseHandler = null;
// We look at WM_NCHITTEST to determine if the mouse
// is in a live region of the control
//
if (m.Msg == NativeMethods.WM_NCHITTEST) {
if (!inHitTest) {
inHitTest = true;
Point pt = new Point((short)NativeMethods.Util.LOWORD((int)m.LParam),
(short)NativeMethods.Util.HIWORD((int)m.LParam));
try {
liveRegion = GetHitTest(pt);
}
catch (Exception e) {
liveRegion = false;
if (ClientUtils.IsCriticalException(e)) {
throw;
}
}
catch {
liveRegion = false;
}
inHitTest = false;
}
}
// Check to see if the mouse
// is in a live region of the control
// and that the context key is not being fired
//
bool isContextKey = (m.Msg == NativeMethods.WM_CONTEXTMENU);
if (liveRegion && (IsMouseMessage(m.Msg) || isContextKey)) {
// ASURT 70725: The ActiveX DataGrid control brings up a context menu on right mouse down when
// it is in edit mode.
// And, when we generate a WM_CONTEXTMENU message later, it calls DefWndProc() which by default
// calls the parent (formdesigner). The FormDesigner then brings up the AxHost context menu.
// This code causes recursive WM_CONTEXTMENU messages to be ignored till we return from the
// live region message.
//
if (m.Msg == NativeMethods.WM_CONTEXTMENU) {
Debug.Assert(!inContextMenu, "Recursively hitting live region for context menu!!!");
inContextMenu = true;
}
try {
DefWndProc(ref m);
}
finally {
if (m.Msg == NativeMethods.WM_CONTEXTMENU) {
inContextMenu = false;
}
if (m.Msg == NativeMethods.WM_LBUTTONUP)
{
// terminate the drag.
//
// Vs Whidbey : 355250
// DTS SRX040824604234 TabControl loses shortcut menu options after adding ActiveX control.
OnMouseDragEnd(true);
}
}
return;
}
// Get the x and y coordniates of the mouse message
//
int x = 0, y = 0;
// Look for a mouse handler.
//
//
if (m.Msg >= NativeMethods.WM_MOUSEFIRST && m.Msg <= NativeMethods.WM_MOUSELAST
|| m.Msg >= NativeMethods.WM_NCMOUSEMOVE && m.Msg <= NativeMethods.WM_NCMBUTTONDBLCLK
|| m.Msg == NativeMethods.WM_SETCURSOR) {
if (eventSvc == null) {
eventSvc = (IEventHandlerService)GetService(typeof(IEventHandlerService));
}
if (eventSvc != null) {
mouseHandler = (IMouseHandler)eventSvc.GetHandler(typeof(IMouseHandler));
}
}
if (m.Msg >= NativeMethods.WM_MOUSEFIRST && m.Msg <= NativeMethods.WM_MOUSELAST) {
NativeMethods.POINT pt = new NativeMethods.POINT();
pt.x = NativeMethods.Util.SignedLOWORD((int)m.LParam);
pt.y = NativeMethods.Util.SignedHIWORD((int)m.LParam);
NativeMethods.MapWindowPoints(m.HWnd, IntPtr.Zero, pt, 1);
x = pt.x;
y = pt.y;
}
else if (m.Msg >= NativeMethods.WM_NCMOUSEMOVE && m.Msg <= NativeMethods.WM_NCMBUTTONDBLCLK) {
x = NativeMethods.Util.SignedLOWORD((int)m.LParam);
y = NativeMethods.Util.SignedHIWORD((int)m.LParam);
}
// This is implemented on the base designer for
// UI activation support. We call it so that
// we can support UI activation.
//
MouseButtons button = MouseButtons.None;
switch (m.Msg) {
case NativeMethods.WM_CREATE:
DefWndProc(ref m);
// Only call OnCreateHandle if this is our OWN
// window handle -- the designer window procs are
// re-entered for child controls.
//
if (m.HWnd == Control.Handle) {
OnCreateHandle();
}
break;
case NativeMethods.WM_GETOBJECT:
// See "How to Handle WM_GETOBJECT" in MSDN
if (NativeMethods.OBJID_CLIENT == (int)m.LParam) {
// Get the IAccessible GUID
//
Guid IID_IAccessible = new Guid(NativeMethods.uuid_IAccessible);
// Get an Lresult for the accessibility Object for this control
//
IntPtr punkAcc;
try {
IAccessible iacc = (IAccessible)this.AccessibilityObject;
if (iacc == null) {
// Accessibility is not supported on this control
//
m.Result = (IntPtr)0;
}
else {
// Obtain the Lresult
//
punkAcc = Marshal.GetIUnknownForObject(iacc);
try {
m.Result = UnsafeNativeMethods.LresultFromObject(ref IID_IAccessible, m.WParam, punkAcc);
}
finally {
Marshal.Release(punkAcc);
}
}
}
catch (Exception e) {
throw e;
}
catch {
throw;
}
}
else { // m.lparam != OBJID_CLIENT, so do default message processing
DefWndProc(ref m);
}
break;
case NativeMethods.WM_MBUTTONDOWN:
case NativeMethods.WM_MBUTTONUP:
case NativeMethods.WM_MBUTTONDBLCLK:
case NativeMethods.WM_NCMOUSEHOVER:
case NativeMethods.WM_NCMOUSELEAVE:
case NativeMethods.WM_MOUSEWHEEL:
case NativeMethods.WM_NCMBUTTONDOWN:
case NativeMethods.WM_NCMBUTTONUP:
case NativeMethods.WM_NCMBUTTONDBLCLK:
// We intentionally eat these messages.
//
break;
case NativeMethods.WM_MOUSEHOVER:
if (mouseHandler != null) {
mouseHandler.OnMouseHover(Component);
}
else {
OnMouseHover();
}
break;
case NativeMethods.WM_MOUSELEAVE:
OnMouseLeave();
BaseWndProc(ref m);
break;
case NativeMethods.WM_NCLBUTTONDBLCLK:
case NativeMethods.WM_LBUTTONDBLCLK:
case NativeMethods.WM_NCRBUTTONDBLCLK:
case NativeMethods.WM_RBUTTONDBLCLK:
if ((m.Msg == NativeMethods.WM_NCRBUTTONDBLCLK || m.Msg == NativeMethods.WM_RBUTTONDBLCLK)) {
button = MouseButtons.Right;
}
else {
button = MouseButtons.Left;
}
if (button == MouseButtons.Left) {
// We handle doubleclick messages, and we also process
// our own simulated double clicks for controls that don't
// specify CS_WANTDBLCLKS.
//
if (mouseHandler != null) {
mouseHandler.OnMouseDoubleClick(Component);
}
else {
OnMouseDoubleClick();
}
}
break;
case NativeMethods.WM_NCLBUTTONDOWN:
case NativeMethods.WM_LBUTTONDOWN:
case NativeMethods.WM_NCRBUTTONDOWN:
case NativeMethods.WM_RBUTTONDOWN:
if ((m.Msg == NativeMethods.WM_NCRBUTTONDOWN || m.Msg == NativeMethods.WM_RBUTTONDOWN)) {
button = MouseButtons.Right;
}
else {
button = MouseButtons.Left;
}
// We don't really want the focus, but we want to focus the designer.
// Below we handle WM_SETFOCUS and do the right thing.
//
NativeMethods.SendMessage(Control.Handle, NativeMethods.WM_SETFOCUS, 0, 0);
// We simulate doubleclick for things that don't...
//
if (button == MouseButtons.Left && IsDoubleClick(x, y)) {
if (mouseHandler != null) {
mouseHandler.OnMouseDoubleClick(Component);
}
else {
OnMouseDoubleClick();
}
}
else {
toolPassThrough = false;
if (!this.EnableDragRect && button == MouseButtons.Left) {
if (toolboxSvc == null) {
toolboxSvc = (IToolboxService)GetService(typeof(IToolboxService));
}
if (toolboxSvc != null && toolboxSvc.GetSelectedToolboxItem((IDesignerHost)GetService(typeof(IDesignerHost))) != null) {
// there is a tool to be dragged, so set passthrough and pass to the parent.
toolPassThrough = true;
}
}
else {
toolPassThrough = false;
}
if (toolPassThrough) {
NativeMethods.SendMessage(Control.Parent.Handle, m.Msg, m.WParam, (IntPtr)GetParentPointFromLparam(m.LParam));
return;
}
if (mouseHandler != null) {
mouseHandler.OnMouseDown(Component, button, x, y);
}
else if (button == MouseButtons.Left) {
OnMouseDragBegin(x,y);
}
else if (button == MouseButtons.Right) {
ISelectionService selSvc = (ISelectionService)GetService(typeof(ISelectionService));
if (selSvc != null) {
selSvc.SetSelectedComponents(new object[] {Component}, SelectionTypes.Primary);
}
}
lastMoveScreenX = x;
lastMoveScreenY = y;
}
break;
case NativeMethods.WM_NCMOUSEMOVE:
case NativeMethods.WM_MOUSEMOVE:
if (((int)m.WParam & NativeMethods.MK_LBUTTON) != 0) {
button = MouseButtons.Left;
}
else if (((int)m.WParam & NativeMethods.MK_RBUTTON) != 0) {
button = MouseButtons.Right;
toolPassThrough = false;
}
else {
toolPassThrough = false;
}
if (lastMoveScreenX != x || lastMoveScreenY != y) {
if (toolPassThrough) {
NativeMethods.SendMessage(Control.Parent.Handle, m.Msg, m.WParam, (IntPtr)GetParentPointFromLparam(m.LParam));
return;
}
if (mouseHandler != null) {
mouseHandler.OnMouseMove(Component, x, y);
}
else if (button == MouseButtons.Left) {
OnMouseDragMove(x, y);
}
}
lastMoveScreenX = x;
lastMoveScreenY = y;
// VSWhidbey #487865. We eat WM_NCMOUSEMOVE messages, since we don't want the non-client area
// of design time controls to repaint on mouse move.
if (m.Msg == NativeMethods.WM_MOUSEMOVE) {
BaseWndProc(ref m);
}
break;
case NativeMethods.WM_NCLBUTTONUP:
case NativeMethods.WM_LBUTTONUP:
case NativeMethods.WM_NCRBUTTONUP:
case NativeMethods.WM_RBUTTONUP:
// This is implemented on the base designer for
// UI activation support.
//
if ((m.Msg == NativeMethods.WM_NCRBUTTONUP || m.Msg == NativeMethods.WM_RBUTTONUP)) {
button = MouseButtons.Right;
}
else {
button = MouseButtons.Left;
}
bool moved = mouseDragMoved;
// And terminate the drag.
//
if (mouseHandler != null) {
mouseHandler.OnMouseUp(Component, button);
}
else {
if (toolPassThrough) {
NativeMethods.SendMessage(Control.Parent.Handle, m.Msg, m.WParam, (IntPtr)GetParentPointFromLparam(m.LParam));
toolPassThrough = false;
return;
}
if (button == MouseButtons.Left) {
OnMouseDragEnd(false);
}
}
// clear any pass through.
toolPassThrough = false;
BaseWndProc(ref m);
break;
case NativeMethods.WM_PRINTCLIENT:
{
using (Graphics g = Graphics.FromHdc(m.WParam)) {
using (PaintEventArgs e = new PaintEventArgs(g, Control.ClientRectangle)) {
DefWndProc(ref m);
OnPaintAdornments(e);
}
}
}
break;
case NativeMethods.WM_PAINT:
// First, save off the update region and
// call our base class.
//
if (OleDragDropHandler.FreezePainting) {
NativeMethods.ValidateRect(m.HWnd, IntPtr.Zero);
break;
}
if (Control == null) {
break;
}
NativeMethods.RECT clip = new NativeMethods.RECT();
IntPtr hrgn = NativeMethods.CreateRectRgn(0, 0, 0, 0);
NativeMethods.GetUpdateRgn(m.HWnd, hrgn, false);
NativeMethods.GetUpdateRect(m.HWnd, ref clip, false);
Region r = Region.FromHrgn(hrgn);
Rectangle paintRect = Rectangle.Empty;
try {
// Call the base class to do its own painting.
//
if (thrownException == null) {
DefWndProc(ref m);
}
// Now do our own painting.
//
Graphics gr = Graphics.FromHwnd(m.HWnd);
if (m.HWnd != Control.Handle) {
// Re-map the clip rect we pass to the paint event args
// to our child coordinates.
//
NativeMethods.POINT pt = new NativeMethods.POINT();
pt.x = 0;
pt.y = 0;
NativeMethods.MapWindowPoints(m.HWnd, Control.Handle, pt, 1);
gr.TranslateTransform(-pt.x, -pt.y);
NativeMethods.MapWindowPoints(m.HWnd, Control.Handle, ref clip, 2);
}
paintRect = new Rectangle(clip.left, clip.top, clip.right-clip.left, clip.bottom-clip.top);
PaintEventArgs pevent = new PaintEventArgs(gr, paintRect);
try {
gr.Clip = r;
if (thrownException == null) {
OnPaintAdornments(pevent);
}
else {
UnsafeNativeMethods.PAINTSTRUCT ps = new UnsafeNativeMethods.PAINTSTRUCT();
IntPtr dc = UnsafeNativeMethods.BeginPaint(m.HWnd, ref ps);
PaintException(pevent, thrownException);
UnsafeNativeMethods.EndPaint(m.HWnd, ref ps);
}
}
finally {
// pevent will dispose the graphics object... no need to do that separately...
//
if (pevent != null) {
pevent.Dispose();
}
else {
gr.Dispose();
}
}
}
finally {
r.Dispose();
NativeMethods.DeleteObject(hrgn);
}
if (OverlayService != null) {
//this will allow any Glyphs to re-paint
//after this control and its designer has painted
paintRect.Location = Control.PointToScreen(paintRect.Location);
OverlayService.InvalidateOverlays(paintRect);
}
break;
case NativeMethods.WM_NCPAINT:
case NativeMethods.WM_NCACTIVATE:
if (m.Msg == NativeMethods.WM_NCACTIVATE) {
DefWndProc(ref m);
}
else if (thrownException == null) {
DefWndProc(ref m);
}
// For some reason we dont always get an NCPAINT with the WM_NCACTIVATE
// usually this repros with themes on.... this can happen when someone calls RedrawWindow without
// the flags to send an NCPAINT. So that we dont double process this event, our calls
// to redraw window should not have RDW_ERASENOW | RDW_UPDATENOW.
if (OverlayService != null) {
if (Control != null && Control.Size != Control.ClientSize && Control.Parent != null) {
// we have a non-client region to invalidate
Rectangle controlScreenBounds = new Rectangle(Control.Parent.PointToScreen(Control.Location), Control.Size);
Rectangle clientAreaScreenBounds = new Rectangle(Control.PointToScreen(Point.Empty), Control.ClientSize);
using (Region nonClient = new Region(controlScreenBounds)) {
nonClient.Exclude(clientAreaScreenBounds);
OverlayService.InvalidateOverlays(nonClient);
}
}
}
break;
case NativeMethods.WM_SETCURSOR:
// We always handle setting the cursor ourselves.
//
if (liveRegion) {
DefWndProc(ref m);
break;
}
if (mouseHandler != null) {
mouseHandler.OnSetCursor(Component);
}
else {
OnSetCursor();
}
break;
case NativeMethods.WM_SIZE:
if (this.thrownException != null) {
Control.Invalidate();
}
DefWndProc(ref m);
break;
case NativeMethods.WM_CANCELMODE:
// When we get cancelmode (i.e. you tabbed away to another window)
// then we want to cancel any pending drag operation!
//
OnMouseDragEnd(true);
DefWndProc(ref m);
break;
case NativeMethods.WM_SETFOCUS:
// We always eat the focus.
//
if (host != null && host.RootComponent != null) {
IRootDesigner rd = host.GetDesigner(host.RootComponent) as IRootDesigner;
if (rd != null) {
ViewTechnology[] techs = rd.SupportedTechnologies;
if (techs.Length > 0) {
Control view = rd.GetView(techs[0]) as Control;
if (view != null) {
view.Focus();
}
}
}
}
break;
case NativeMethods.WM_CONTEXTMENU:
if (inContextMenu) {
break;
}
// We handle this in addition to a right mouse button.
// Why? Because we often eat the right mouse button, so
// it may never generate a WM_CONTEXTMENU. However, the
// system may generate one in response to an F-10.
//
x = NativeMethods.Util.SignedLOWORD((int)m.LParam);
y = NativeMethods.Util.SignedHIWORD((int)m.LParam);
ToolStripKeyboardHandlingService keySvc = (ToolStripKeyboardHandlingService)GetService(typeof(ToolStripKeyboardHandlingService));
bool handled = false;
if (keySvc != null)
{
handled = keySvc.OnContextMenu(x, y);
}
if (!handled)
{
if (x == -1 && y == -1) {
// for shift-F10
Point p = Cursor.Position;
x = p.X;
y = p.Y;
}
OnContextMenu(x, y);
}
break;
default:
if (m.Msg == NativeMethods.WM_MOUSEENTER) {
OnMouseEnter();
BaseWndProc(ref m);
}
// We eat all key handling to the control. Controls generally
// should not be getting focus anyway, so this shouldn't happen.
// However, we want to prevent this as much as possible.
//
else if (m.Msg < NativeMethods.WM_KEYFIRST || m.Msg > NativeMethods.WM_KEYLAST) {
DefWndProc(ref m);
}
break;
}
}
///
/// This is a subclass window that we attach to all child windows.
/// We use this to disable a child hwnd's UI during design time.
///
private class ChildSubClass : NativeWindow, IDesignerTarget {
private ControlDesigner designer;
///
/// Creates a new ChildSubClass object. This subclasses
/// the given hwnd immediately.
///
// AssignHandle calls NativeWindow::OnHandleChanged, but we do not override it so we should be okay
[SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
public ChildSubClass(ControlDesigner designer, IntPtr hwnd) {
this.designer = designer;
if (designer != null) {
designer.disposingHandler += new EventHandler(this.OnDesignerDisposing);
}
AssignHandle(hwnd);
}
void IDesignerTarget.DefWndProc(ref Message m) {
base.DefWndProc(ref m);
}
public void Dispose() {
designer = null;
}
private void OnDesignerDisposing(object sender, EventArgs e) {
Dispose();
}
///
/// Overrides Window's WndProc to process messages.
///
protected override void WndProc(ref Message m) {
if (designer == null) {
DefWndProc(ref m);
return;
}
if (m.Msg == NativeMethods.WM_DESTROY) {
designer.RemoveSubclassedWindow(m.HWnd);
}
if (m.Msg == NativeMethods.WM_PARENTNOTIFY &&
NativeMethods.Util.LOWORD((int)m.WParam) == (short)NativeMethods.WM_CREATE) {
designer.HookChildHandles(m.LParam); // they will get removed from the collection just above
}
// We want these messages to go through the designer's WndProc
// method, and we want people to be able to do default processing
// with the designer's DefWndProc. So, we stuff ourselves into
// the designers window target and call their WndProc.
//
IDesignerTarget designerTarget = designer.DesignerTarget;
designer.DesignerTarget = this;
Debug.Assert(m.HWnd == this.Handle, "Message handle differs from target handle");
try {
designer.WndProc(ref m);
}
catch (Exception ex){
designer.SetUnhandledException(Control.FromChildHandle(m.HWnd), ex);
}
catch {
Debug.Fail("non CLS-compliant exception");
}
finally {
// make sure the designer wasn't destroyed
//
if (designer != null && designer.Component != null) {
designer.DesignerTarget = designerTarget;
}
}
}
}
///
/// This is a subclass class that attaches to a control instance.
/// Controls can be subclasses by hooking their IWindowTarget
/// interface. We use this to disable a child hwnd's UI during
/// design time.
///
private class ChildWindowTarget : IWindowTarget, IDesignerTarget {
private ControlDesigner designer;
private Control childControl;
private IWindowTarget oldWindowTarget;
private IntPtr handle = IntPtr.Zero;
///
/// Creates a new ChildWindowTarget object. This hooks the
/// given control's window target.
///
public ChildWindowTarget(ControlDesigner designer, Control childControl, IWindowTarget oldWindowTarget) {
this.designer = designer;
this.childControl = childControl;
this.oldWindowTarget = oldWindowTarget;
}
public IWindowTarget OldWindowTarget {
get {
return oldWindowTarget;
}
}
///
/// Causes default window processing for the given message. We
/// just forward this on to the old control target.
///
public void DefWndProc(ref Message m) {
oldWindowTarget.OnMessage(ref m);
}
[SuppressMessage("Microsoft.Usage", "CA2216:DisposableTypesShouldDeclareFinalizer")]
public void Dispose() {
// Do nothing. We will pick this up through a null DesignerTarget property
// when we come out of the message loop.
}
///
/// Called when the window handle of the control has changed.
///
public void OnHandleChange(IntPtr newHandle) {
handle = newHandle;
oldWindowTarget.OnHandleChange(newHandle);
}
///
/// Called to do control-specific processing for this window.
///
public void OnMessage(ref Message m) {
// If the designer has jumped ship, the continue
// partying on messages, but send them back to the original control.
if (designer.Component == null) {
oldWindowTarget.OnMessage(ref m);
return;
}
// We want these messages to go through the designer's WndProc
// method, and we want people to be able to do default processing
// with the designer's DefWndProc. So, we stuff the old window
// target into the designer's target and then call their
// WndProc.
//
IDesignerTarget designerTarget = designer.DesignerTarget;
designer.DesignerTarget = this;
try {
designer.WndProc(ref m);
}
catch (Exception ex) {
designer.SetUnhandledException(childControl, ex);
}
catch {
}
finally {
// If the designer disposed us, then we should follow suit.
//
if (designer.DesignerTarget == null) {
designerTarget.Dispose();
}
else {
designer.DesignerTarget = designerTarget;
}
// ASURT 45655: Controls (primarily RichEdit) will register themselves as
// drag-drop source/targets when they are instantiated. Normally, when they
// are being designed, we will RevokeDragDrop() in their designers. The problem
// occurs when these controls are inside a UserControl. At that time, we do not
// have a designer for these controls, and they prevent the ParentControlDesigner's
// drag-drop from working. What we do is to loop through all child controls that
// do not have a designer (in HookChildControls()), and RevokeDragDrop() after
// their handles have been created.
//
if (m.Msg == NativeMethods.WM_CREATE) {
Debug.Assert(handle != IntPtr.Zero, "Handle for control not created");
NativeMethods.RevokeDragDrop(handle);
}
}
}
}
///
/// This class is the interface the designer will use to funnel messages
/// back to the control.
///
private interface IDesignerTarget : IDisposable {
///
/// Causes default window processing for the given message. We
/// just forward this on to the old control target.
///
void DefWndProc(ref Message m);
}
///
/// This class replaces Control's window target, which effectively subclasses
/// the control in a handle-independent way.
///
private class DesignerWindowTarget : IWindowTarget, IDesignerTarget, IDisposable {
internal ControlDesigner designer;
internal IWindowTarget oldTarget;
///
/// Creates a new DesignerTarget object.
///
public DesignerWindowTarget(ControlDesigner designer) {
Control control = designer.Control;
this.designer = designer;
this.oldTarget = control.WindowTarget;
control.WindowTarget = this;
}
///
/// Causes default window processing for the given message. We
/// just forward this on to the old control target.
///
public void DefWndProc(ref Message m) {
oldTarget.OnMessage(ref m);
}
///
/// Disposes this window target. This re-establishes the
/// prior window target.
///
public void Dispose() {
if (designer != null) {
designer.Control.WindowTarget = oldTarget;
designer = null;
}
}
///
/// Called when the window handle of the control has changed.
///
public void OnHandleChange(IntPtr newHandle) {
oldTarget.OnHandleChange(newHandle);
if (newHandle != IntPtr.Zero) {
designer.OnHandleChange();
}
}
///
/// Called to do control-specific processing for this window.
///
public void OnMessage(ref Message m) {
// We want these messages to go through the designer's WndProc
// method, and we want people to be able to do default processing
// with the designer's DefWndProc. So, we stuff ourselves into
// the designers window target and call their WndProc.
//
ControlDesigner currentDesigner = designer;
if (currentDesigner != null) {
IDesignerTarget designerTarget = currentDesigner.DesignerTarget;
currentDesigner.DesignerTarget = this;
try {
currentDesigner.WndProc(ref m);
}
catch (Exception ex) {
designer.SetUnhandledException(designer.Control, ex);
}
catch {
Debug.Fail("non-CLS compliant exception");
}
finally {
if (currentDesigner != null) {
currentDesigner.DesignerTarget = designerTarget;
}
}
}
else {
DefWndProc(ref m);
}
}
}
///
/// [To be supplied.]
///
public ControlDesignerAccessibleObject(ControlDesigner designer, Control control) {
this.designer = designer;
this.control = control;
}
///
/// [To be supplied.]
///
public override Rectangle Bounds {
get {
return control.AccessibilityObject.Bounds;
}
}
///
/// [To be supplied.]
///
public override string Description {
get {
return control.AccessibilityObject.Description;
}
}
private IDesignerHost DesignerHost {
get {
if (host == null) {
host = (IDesignerHost)designer.GetService(typeof(IDesignerHost));
}
return host;
}
}
///
/// [To be supplied.]
///
public override string DefaultAction {
get {
return "";
}
}
///
/// [To be supplied.]
///
public override string Name {
get {
return control.Name;
}
}
///
/// [To be supplied.]
///
public override AccessibleObject Parent {
get {
return control.AccessibilityObject.Parent;
}
}
///
/// [To be supplied.]
///
public override AccessibleRole Role {
get {
return control.AccessibilityObject.Role;
}
}
private ISelectionService SelectionService {
get {
if (selSvc == null) {
selSvc = (ISelectionService)designer.GetService(typeof(ISelectionService));
}
return selSvc;
}
}
///
/// [To be supplied.]
///
public override AccessibleStates State {
get {
AccessibleStates state = control.AccessibilityObject.State;
ISelectionService s = SelectionService;
if (s != null) {
if (s.GetComponentSelected(this.control)) {
state |= AccessibleStates.Selected;
}
if (s.PrimarySelection == this.control) {
state |= AccessibleStates.Focused;
}
}
return state;
}
}
///
/// [To be supplied.]
///
public override string Value {
get {
return control.AccessibilityObject.Value;
}
}
///
/// [To be supplied.]
///
public override AccessibleObject GetChild(int index) {
Debug.WriteLineIf(CompModSwitches.MSAA.TraceInfo, "ControlDesignerAccessibleObject.GetChild(" + index.ToString(CultureInfo.InvariantCulture) + ")");
Control.ControlAccessibleObject childAccObj = control.AccessibilityObject.GetChild(index) as Control.ControlAccessibleObject;
if (childAccObj != null) {
AccessibleObject cao = GetDesignerAccessibleObject(childAccObj);
if (cao != null) {
return cao;
}
}
return control.AccessibilityObject.GetChild(index);
}
///
/// Retrieves the number of child controls.
///
public override int Count {
get {
return realCollection.Count;
}
}
///
/// [To be supplied.]
///
public new bool IsReadOnly {
get {
return realCollection.IsReadOnly;
}
}
///
/// [To be supplied.]
///
public override void AddRange(Control[] controls) {
realCollection.AddRange(controls);
}
///
/// [To be supplied.]
///
public override void Clear() {
// only remove the sited non-inherited components
//
for (int i = realCollection.Count - 1; i >= 0; i--) {
if (realCollection[i] != null &&
realCollection[i].Site != null &&
TypeDescriptor.GetAttributes(realCollection[i]).Contains(InheritanceAttribute.NotInherited)) {
realCollection.RemoveAt(i);
}
}
}
}
// Custom code dom serializer for the DesignerControlCollection. We need this so we can filter out controls
// that aren't sited in the host's container.
internal class DesignerControlCollectionCodeDomSerializer : CollectionCodeDomSerializer {
protected override object SerializeCollection(IDesignerSerializationManager manager, CodeExpression targetExpression, Type targetType, ICollection originalCollection, ICollection valuesToSerialize) {
ArrayList subset = new ArrayList();
if (valuesToSerialize != null && valuesToSerialize.Count > 0) {
foreach (object val in valuesToSerialize) {
IComponent comp = val as IComponent;
if (comp != null && comp.Site != null && !(comp.Site is INestedSite)) {
subset.Add(comp);
}
}
}
return base.SerializeCollection(manager, targetExpression, targetType, originalCollection, subset);
}
}
///
/// This class is used to provide the 'dock in parent' or 'undock in parent'
/// designer action item.
///
private class DockingActionList : DesignerActionList {
private ControlDesigner _designer;
private IDesignerHost _host;
///
/// Caches off the localized name of our action
///
public DockingActionList(ControlDesigner owner) : base(owner.Component) {
_designer = owner;
_host = GetService(typeof(IDesignerHost)) as IDesignerHost;
}
private string GetActionName() {
PropertyDescriptor dockProp = TypeDescriptor.GetProperties(Component)["Dock"];
if (dockProp != null) {
DockStyle dockStyle = (DockStyle)dockProp.GetValue(Component);
if(dockStyle == DockStyle.Fill) {
return SR.GetString(SR.DesignerShortcutUndockInParent);
} else {
return SR.GetString(SR.DesignerShortcutDockInParent);
}
}
return null;
}
///
/// Returns our undock or dock item
///
public override DesignerActionItemCollection GetSortedActionItems() {
DesignerActionItemCollection items = new DesignerActionItemCollection();
string actionName = GetActionName();
if(actionName != null) {
items.Add(new DesignerActionVerbItem(new DesignerVerb(GetActionName(), OnDockActionClick)));
}
return items;
}
///
/// Called when this designer's 'DockInParent' or 'Undock' designer action
/// has been clicked.
///
private void OnDockActionClick(object sender, EventArgs e) {
DesignerVerb designerVerb = sender as DesignerVerb;
if (designerVerb != null && _host != null) {
using (DesignerTransaction t = _host.CreateTransaction(designerVerb.Text)) {
//set the dock prop to DockStyle.Fill
PropertyDescriptor dockProp = TypeDescriptor.GetProperties(Component)["Dock"];
DockStyle dockStyle = (DockStyle)dockProp.GetValue(Component);
if(dockStyle == DockStyle.Fill) {
dockProp.SetValue(Component, DockStyle.None);
} else {
dockProp.SetValue(Component, DockStyle.Fill);
}
t.Commit();
}
}
}
}
///
/// This TransparentBehavior is associated with the BodyGlyph for
/// this ControlDesigner. When the BehaviorService hittests a glyph
/// w/a TransparentBehavior, all messages will be passed through
/// the BehaviorService directly to the ControlDesigner.
/// During a Drag operation, when the BehaviorService hittests
///
internal class TransparentBehavior : System.Windows.Forms.Design.Behavior.Behavior {
ControlDesigner designer;//the related ControlDesigner
Rectangle controlRect = Rectangle.Empty;//the client rectangle of the related control in screen coordinates. Used to check if we can drop.
///
/// Constructor that accepts the related ControlDesigner.
///
internal TransparentBehavior(ControlDesigner designer) {
this.designer = designer;
}
///
/// This property performs a hit test on the ControlDesigner
/// to determine if the BodyGlyph should return '-1' for
/// hit testing (letting all messages pass directly to the
/// the control).
///
internal bool IsTransparent(Point p) {
return designer.GetHitTest(p);
}
///
/// Forwards DragDrop notification from the BehaviorService to
/// the related ControlDesigner.
///
public override void OnDragDrop(Glyph g, DragEventArgs e) {
controlRect = Rectangle.Empty;
designer.OnDragDrop(e);
}
///
/// Forwards DragDrop notification from the BehaviorService to
/// the related ControlDesigner.
///
public override void OnDragEnter(Glyph g, DragEventArgs e) {
if (designer != null && designer.Control != null) {
controlRect = designer.Control.RectangleToScreen(designer.Control.ClientRectangle);
}
designer.OnDragEnter(e);
}
///
/// Forwards DragDrop notification from the BehaviorService to
/// the related ControlDesigner.
///
public override void OnDragLeave(Glyph g, EventArgs e) {
controlRect = Rectangle.Empty;
designer.OnDragLeave(e);
}
///
/// Forwards DragDrop notification from the BehaviorService to
/// the related ControlDesigner.
///
public override void OnDragOver(Glyph g, DragEventArgs e) {
// If we are not over a valid drop area, then do not allow the drag/drop
//VSWhidbey# 364083. Now that all dragging/dropping is done via
//the behavior service and adorner window, we have to do our own
//validation, and cannot rely on the OS to do it for us.
if (e != null && controlRect != Rectangle.Empty && !controlRect.Contains(new Point(e.X, e.Y))) {
e.Effect = DragDropEffects.None;
return;
}
designer.OnDragOver(e);
}
///
/// Forwards DragDrop notification from the BehaviorService to
/// the related ControlDesigner.
///
public override void OnGiveFeedback(Glyph g, GiveFeedbackEventArgs e) {
designer.OnGiveFeedback(e);
}
}
private class CanResetSizePropertyDescriptor : PropertyDescriptor
{
private PropertyDescriptor _basePropDesc;
public CanResetSizePropertyDescriptor (PropertyDescriptor pd) : base(pd)
{
this._basePropDesc = pd;
}
public override Type ComponentType
{
get
{
return _basePropDesc.ComponentType;
}
}
public override string DisplayName
{
get {
return _basePropDesc.DisplayName;
}
}
public override bool IsReadOnly
{
get
{
return _basePropDesc.IsReadOnly;
}
}
public override Type PropertyType
{
get
{
return _basePropDesc.PropertyType;
}
}
public override bool CanResetValue(object component)
{
// VSWhidbey 379297 -- since we can't get to the DefaultSize property, we use the existing
// ShouldSerialize logic.
return _basePropDesc.ShouldSerializeValue(component);
}
public override object GetValue(object component)
{
return _basePropDesc.GetValue(component);
}
public override void ResetValue(object component)
{
_basePropDesc.ResetValue(component);
}
public override void SetValue(object component, object value)
{
_basePropDesc.SetValue(component, value);
}
public override bool ShouldSerializeValue(object component)
{
// we always want to serialize values.
return true;
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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- ErrorTableItemStyle.cs
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