Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / ToolStripPanelCell.cs / 1 / ToolStripPanelCell.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System.Drawing; using System.Windows.Forms.Layout; using System.Collections.Specialized; using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Globalization; /// this class is a container for toolstrips on a rafting row. /// you can set layout styles on this container all day long and not /// affect the underlying toolstrip's properties.... so if its /// removed from a rafting container its still got its defaults /// set up for it. internal class ToolStripPanelCell : ArrangedElement { private ToolStrip _wrappedToolStrip = null; private ToolStripPanelRow parent = null; private Size maxSize = LayoutUtils.MaxSize; private bool currentlySizing = false; private bool currentlyDragging = false; private bool restoreOnVisibleChanged = false; private Rectangle cachedBounds = Rectangle.Empty; #if DEBUG private string cellID; [ThreadStatic] private static int cellCount; #endif public ToolStripPanelCell(Control control):this(null, control) { } public ToolStripPanelCell(ToolStripPanelRow parent, Control control) { #if DEBUG // Ensure 1:1 Cell/ToolStripPanel mapping cellID = string.Format(CultureInfo.CurrentCulture, "{0}.{1}", control.Name, ++cellCount); Debug.Assert(cellCount <= ToolStripManager.ToolStrips.Count, "who is allocating an extra toolstrippanel cell?"); #endif this.ToolStripPanelRow = parent; this._wrappedToolStrip = control as ToolStrip; if (control == null) { throw new ArgumentNullException("control"); } else if (_wrappedToolStrip == null) { throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.TypedControlCollectionShouldBeOfType, typeof(ToolStrip).Name)), control.GetType().Name); } CommonProperties.SetAutoSize(this, true); _wrappedToolStrip.LocationChanging += new ToolStripLocationCancelEventHandler(this.OnToolStripLocationChanging); _wrappedToolStrip.VisibleChanged += new EventHandler(this.OnToolStripVisibleChanged); } public Rectangle CachedBounds { get { return cachedBounds; } set { cachedBounds = value; Debug.Assert(cachedBounds.X >= 0 && cachedBounds.Y >= 0, "cached bounds are outside of the client area, investigate"); } } public Control Control { get { return _wrappedToolStrip; } } // ToolStripPanelCell is considered to be Visible if the wrapped control is InDesignMode. // This property is accessed from the ToolStripPanelRow in cases where we are moving the toolStrip around // during a drag operation. public bool ControlInDesignMode { get { return (_wrappedToolStrip != null && _wrappedToolStrip.IsInDesignMode); } } public IArrangedElement InnerElement { get { return _wrappedToolStrip as IArrangedElement; } } public ISupportToolStripPanel DraggedControl { get { return _wrappedToolStrip as ISupportToolStripPanel; } } public ToolStripPanelRow ToolStripPanelRow { get { return parent; } set { if (parent != value) { if (parent != null) { ((IList)parent.Cells).Remove(this); } parent = value; this.Margin = Padding.Empty; } } } public override bool Visible { get { if (Control != null && Control.ParentInternal == ToolStripPanelRow.ToolStripPanel) { return InnerElement.ParticipatesInLayout; } return false; } set { Control.Visible = value; } } public Size MaximumSize { get { return maxSize; } } public override LayoutEngine LayoutEngine { get { return DefaultLayout.Instance; } } protected override IArrangedElement GetContainer() { return parent; } public int Grow(int growBy) { if (ToolStripPanelRow.Orientation == Orientation.Vertical) { return GrowVertical(growBy); } else { return GrowHorizontal(growBy); } } private int GrowVertical(int growBy) { // Grow ---] // Pref [ ] // Max [ ] if (MaximumSize.Height >= Control.PreferredSize.Height) { // nothing to grow. return 0; } // Grow ---] // Pref [ ] // Max [ ] if (MaximumSize.Height + growBy >= Control.PreferredSize.Height) { int freed = Control.PreferredSize.Height - MaximumSize.Height; maxSize=LayoutUtils.MaxSize; return freed; } // Grow ---] // Pref [ ] // Max [ ] if (MaximumSize.Height + growBy < Control.PreferredSize.Height) { maxSize.Height += growBy; return growBy; } return 0; } private int GrowHorizontal(int growBy) { // Grow ---] // Pref [ ] // Max [ ] if (MaximumSize.Width >= Control.PreferredSize.Width) { // nothing to grow. return 0; } // Grow ---] // Pref [ ] // Max [ ] if (MaximumSize.Width + growBy >= Control.PreferredSize.Width) { int freed = Control.PreferredSize.Width - MaximumSize.Width; maxSize=LayoutUtils.MaxSize; return freed; } // Grow ---] // Pref [ ] // Max [ ] if (MaximumSize.Width + growBy < Control.PreferredSize.Width) { maxSize.Width += growBy; return growBy; } return 0; } protected override void Dispose(bool disposing) { try { if (disposing) { if (_wrappedToolStrip != null) { #if DEBUG cellCount--; #endif _wrappedToolStrip.LocationChanging -= new ToolStripLocationCancelEventHandler(this.OnToolStripLocationChanging); _wrappedToolStrip.VisibleChanged -= new EventHandler(this.OnToolStripVisibleChanged); } _wrappedToolStrip = null; if (parent != null) { ((IList)parent.Cells).Remove(this); } parent = null; } #if DEBUG else { cellCount--; } #endif } finally { base.Dispose(disposing); } } protected override ArrangedElementCollection GetChildren() { return ArrangedElementCollection.Empty; } public override Size GetPreferredSize(Size constrainingSize) { ISupportToolStripPanel draggedControl = DraggedControl; Size preferredSize = Size.Empty; if (draggedControl.Stretch) { if (ToolStripPanelRow.Orientation == Orientation.Horizontal) { constrainingSize.Width = ToolStripPanelRow.Bounds.Width; preferredSize = _wrappedToolStrip.GetPreferredSize(constrainingSize); preferredSize.Width = constrainingSize.Width; } else { constrainingSize.Height = ToolStripPanelRow.Bounds.Height; preferredSize = _wrappedToolStrip.GetPreferredSize(constrainingSize); preferredSize.Height = constrainingSize.Height; } } else { preferredSize = (!_wrappedToolStrip.AutoSize) ? _wrappedToolStrip.Size : _wrappedToolStrip.GetPreferredSize(constrainingSize); } // return LayoutUtils.IntersectSizes(constrainingSize, preferredSize); return preferredSize; } protected override void SetBoundsCore(Rectangle bounds, BoundsSpecified specified) { currentlySizing = true; this.CachedBounds = bounds; try { if (DraggedControl.IsCurrentlyDragging) { if (ToolStripPanelRow.Cells[ToolStripPanelRow.Cells.Count -1] == this) { Rectangle displayRectangle = ToolStripPanelRow.DisplayRectangle; if (ToolStripPanelRow.Orientation == Orientation.Horizontal) { int spaceToFree = bounds.Right - displayRectangle.Right; if (spaceToFree > 0 && bounds.Width > spaceToFree) { bounds.Width -= spaceToFree; } } else { int spaceToFree = bounds.Bottom - displayRectangle.Bottom; if (spaceToFree > 0 && bounds.Height > spaceToFree) { bounds.Height -= spaceToFree; } } } Debug.WriteLineIf(ToolStripPanelRow.ToolStripPanelMouseDebug.TraceVerbose, "[CELL] DRAGGING calling SetBounds " + bounds.ToString()); base.SetBoundsCore(bounds,specified); InnerElement.SetBounds(bounds, specified); } else { if (!ToolStripPanelRow.CachedBoundsMode) { Debug.WriteLineIf(ToolStripPanelRow.ToolStripPanelMouseDebug.TraceVerbose, "[CELL] NOT DRAGGING calling SetBounds " + bounds.ToString()); base.SetBoundsCore(bounds,specified); InnerElement.SetBounds(bounds, specified); } } } finally { currentlySizing = false; } } public int Shrink(int shrinkBy) { if (ToolStripPanelRow.Orientation == Orientation.Vertical) { return ShrinkVertical(shrinkBy); } else { return ShrinkHorizontal(shrinkBy); } } private int ShrinkHorizontal(int shrinkBy) { return 0; } private int ShrinkVertical(int shrinkBy) { return 0; } ////// New EventHandler for The LocationChanging so that ToolStripPanelCell Listens to the Location Property on the ToolStrips's being changed. /// The ToolStrip needs to Raft (Join) to the approriate Location Depending on the new Location w.r.t to the oldLocation ... /// Hence the need for this event listener. /// private void OnToolStripLocationChanging(object sender, ToolStripLocationCancelEventArgs e) { if (ToolStripPanelRow == null) { return; } if (!currentlySizing && !currentlyDragging) { try { currentlyDragging = true; Point newloc = e.NewLocation; // detect if we havent yet performed a layout - force one so we can // properly join to the row. if (ToolStripPanelRow != null && ToolStripPanelRow.Bounds == Rectangle.Empty) { ToolStripPanelRow.ToolStripPanel.PerformUpdate(true); } if (_wrappedToolStrip != null) { ToolStripPanelRow.ToolStripPanel.Join(_wrappedToolStrip, newloc); } } finally { currentlyDragging = false; e.Cancel = true; } } } private void OnToolStripVisibleChanged(object sender, EventArgs e) { if (_wrappedToolStrip != null && !_wrappedToolStrip.IsInDesignMode && !_wrappedToolStrip.IsCurrentlyDragging && !_wrappedToolStrip.IsDisposed // ensure we have a live-runtime only toolstrip. && !_wrappedToolStrip.Disposing) { // VSWhidbey 395502 - rejoin the row when visibility is toggled. // we dont want to do this logic at DT, as the DropSourceBehavior // will set the toolstrip visible = false. if (!Control.Visible) { // if we are becoming visible = false, remember if we were in a toolstrippanelrow at the time. restoreOnVisibleChanged = (ToolStripPanelRow != null && ((IList)ToolStripPanelRow.Cells).Contains(this)); } else if (restoreOnVisibleChanged) { try { // if we are becoming visible = true, and we ARE in a toolstrippanelrow, rejoin. if (ToolStripPanelRow != null && ((IList)ToolStripPanelRow.Cells).Contains(this)) { ToolStripPanelRow.ToolStripPanel.Join(_wrappedToolStrip, _wrappedToolStrip.Location); } } finally { restoreOnVisibleChanged = false; } } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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