Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / System / Windows / Controls / ListBoxItem.cs / 1 / ListBoxItem.cs
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//---------------------------------------------------------------------------
using MS.Internal;
using MS.Internal.KnownBoxes;
using MS.Utility;
using System.ComponentModel;
using System.Diagnostics;
using System.Windows.Threading;
using System.Windows.Automation.Peers;
using System.Windows.Media;
using System.Windows.Input;
using System.Windows.Controls.Primitives;
using System.Windows.Shapes;
using System;
// Disable CS3001: Warning as Error: not CLS-compliant
#pragma warning disable 3001
namespace System.Windows.Controls
{
///
/// Control that implements a selectable item inside a ListBox.
///
[DefaultEvent("Selected")]
public class ListBoxItem : ContentControl
{
//-------------------------------------------------------------------
//
// Constructors
//
//-------------------------------------------------------------------
#region Constructors
///
/// Default DependencyObject constructor
///
public ListBoxItem() : base()
{
}
static ListBoxItem()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(ListBoxItem), new FrameworkPropertyMetadata(typeof(ListBoxItem)));
_dType = DependencyObjectType.FromSystemTypeInternal(typeof(ListBoxItem));
KeyboardNavigation.DirectionalNavigationProperty.OverrideMetadata(typeof(ListBoxItem), new FrameworkPropertyMetadata(KeyboardNavigationMode.Once));
KeyboardNavigation.TabNavigationProperty.OverrideMetadata(typeof(ListBoxItem), new FrameworkPropertyMetadata(KeyboardNavigationMode.Local));
}
#endregion
//--------------------------------------------------------------------
//
// Public Properties
//
//-------------------------------------------------------------------
#region Public Properties
///
/// Indicates whether this ListBoxItem is selected.
///
public static readonly DependencyProperty IsSelectedProperty =
Selector.IsSelectedProperty.AddOwner(typeof(ListBoxItem),
new FrameworkPropertyMetadata(BooleanBoxes.FalseBox,
FrameworkPropertyMetadataOptions.BindsTwoWayByDefault | FrameworkPropertyMetadataOptions.Journal,
new PropertyChangedCallback(OnIsSelectedChanged)));
///
/// Indicates whether this ListBoxItem is selected.
///
[Bindable(true), Category("Appearance")]
public bool IsSelected
{
get { return (bool) GetValue(IsSelectedProperty); }
set { SetValue(IsSelectedProperty, BooleanBoxes.Box(value)); }
}
private static void OnIsSelectedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ListBoxItem listItem = d as ListBoxItem;
bool isSelected = (bool) e.NewValue;
Selector parentSelector = listItem.ParentSelector;
if (parentSelector != null)
{
parentSelector.RaiseIsSelectedChangedAutomationEvent(listItem, isSelected);
}
if (isSelected)
{
listItem.OnSelected(new RoutedEventArgs(Selector.SelectedEvent, listItem));
}
else
{
listItem.OnUnselected(new RoutedEventArgs(Selector.UnselectedEvent, listItem));
}
}
///
/// Event indicating that the IsSelected property is now true.
///
/// Event arguments
protected virtual void OnSelected(RoutedEventArgs e)
{
HandleIsSelectedChanged(true, e);
}
///
/// Event indicating that the IsSelected property is now false.
///
/// Event arguments
protected virtual void OnUnselected(RoutedEventArgs e)
{
HandleIsSelectedChanged(false, e);
}
private void HandleIsSelectedChanged(bool newValue, RoutedEventArgs e)
{
RaiseEvent(e);
}
#endregion
#region Events
///
/// Raised when the item's IsSelected property becomes true.
///
public static readonly RoutedEvent SelectedEvent = Selector.SelectedEvent.AddOwner(typeof(ListBoxItem));
///
/// Raised when the item's IsSelected property becomes true.
///
public event RoutedEventHandler Selected
{
add
{
AddHandler(SelectedEvent, value);
}
remove
{
RemoveHandler(SelectedEvent, value);
}
}
///
/// Raised when the item's IsSelected property becomes false.
///
public static readonly RoutedEvent UnselectedEvent = Selector.UnselectedEvent.AddOwner(typeof(ListBoxItem));
///
/// Raised when the item's IsSelected property becomes false.
///
public event RoutedEventHandler Unselected
{
add
{
AddHandler(UnselectedEvent, value);
}
remove
{
RemoveHandler(UnselectedEvent, value);
}
}
#endregion
//--------------------------------------------------------------------
//
// Protected Methods
//
//--------------------------------------------------------------------
#region Protected Methods
///
/// Creates AutomationPeer (
protected override AutomationPeer OnCreateAutomationPeer()
{
return new ListBoxItemWrapperAutomationPeer(this);
}
///
/// This is the method that responds to the MouseButtonEvent event.
///
/// Event arguments
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
if (!e.Handled)
{
//
e.Handled = true;
HandleMouseButtonDown(MouseButton.Left);
}
base.OnMouseLeftButtonDown(e);
}
///
/// This is the method that responds to the MouseButtonEvent event.
///
/// Event arguments
protected override void OnMouseRightButtonDown(MouseButtonEventArgs e)
{
if (!e.Handled)
{
//
e.Handled = true;
HandleMouseButtonDown(MouseButton.Right);
}
base.OnMouseRightButtonDown(e);
}
private void HandleMouseButtonDown(MouseButton mouseButton)
{
if (Selector.UiGetIsSelectable(this) && Focus())
{
ListBox parent = ParentListBox;
if (parent != null)
{
parent.NotifyListItemClicked(this, mouseButton);
}
}
}
///
/// Called when IsMouseOver changes on this element.
///
///
protected override void OnMouseEnter(MouseEventArgs e)
{
// abort any drag operation we have queued.
if (parentNotifyDraggedOperation != null)
{
parentNotifyDraggedOperation.Abort();
parentNotifyDraggedOperation = null;
}
if (IsMouseOver)
{
ListBox parent = ParentListBox;
if (parent != null && Mouse.LeftButton == MouseButtonState.Pressed)
{
parent.NotifyListItemMouseDragged(this);
}
}
base.OnMouseEnter(e);
}
///
/// Called when IsMouseOver changes on this element.
///
///
protected override void OnMouseLeave(MouseEventArgs e)
{
// abort any drag operation we have queued.
if (parentNotifyDraggedOperation != null)
{
parentNotifyDraggedOperation.Abort();
parentNotifyDraggedOperation = null;
}
base.OnMouseLeave(e);
}
///
/// Called when the visual parent of this element changes.
///
///
protected internal override void OnVisualParentChanged(DependencyObject oldParent)
{
ItemsControl oldItemsControl = null;
if (VisualTreeHelper.GetParent(this) == null)
{
if (IsKeyboardFocusWithin)
{
// This ListBoxItem had focus but was removed from the tree.
// The normal behavior is for focus to become null, but we would rather that
// focus go to the parent ListBox.
// Use the oldParent to get a reference to the ListBox that this ListBoxItem used to be in.
// The oldParent's ItemsOwner should be the ListBox.
oldItemsControl = ItemsControl.GetItemsOwner(oldParent);
}
}
else
{
// When the item is added to the tree while grouping, the item will need to
// update its IsSelected property. This is currently less optimal than the non-grouped
// case where IsSelected is updated directly on the child because each selected
// child here will have to search the selected items collection (but usually this
// is a small number and will only happen when some style changed and caused everything
// to be re-generated).
Selector selector = ParentSelector;
if (selector != null)
{
if ((selector.ItemContainerGenerator.GroupStyle != null) && !IsSelected)
{
object item = selector.ItemContainerGenerator.ItemFromContainer(this);
if ((item != null) && selector._selectedItems.Contains(item))
{
IsSelected = true;
}
}
}
}
base.OnVisualParentChanged(oldParent);
// If earlier, we decided to set focus to the old parent ListBox, do it here
// after calling base so that the state for IsKeyboardFocusWithin is updated correctly.
if (oldItemsControl != null)
{
oldItemsControl.Focus();
}
}
#endregion
//-------------------------------------------------------------------
//
// Implementation
//
//--------------------------------------------------------------------
#region Implementation
private ListBox ParentListBox
{
get
{
return ParentSelector as ListBox;
}
}
internal Selector ParentSelector
{
get
{
return ItemsControl.ItemsControlFromItemContainer(this) as Selector;
}
}
#endregion
#if OLD_AUTOMATION
// left here for reference only as it is still used by MonthCalendar
///
/// DependencyProperty for SelectionContainer property.
///
internal static readonly DependencyProperty SelectionContainerProperty
= DependencyProperty.RegisterAttached("SelectionContainer", typeof(UIElement), typeof(ListBoxItem),
new FrameworkPropertyMetadata((UIElement)null));
#endif
#region Private Fields
DispatcherOperation parentNotifyDraggedOperation = null;
#endregion
#region DTypeThemeStyleKey
// Returns the DependencyObjectType for the registered ThemeStyleKey's default
// value. Controls will override this method to return approriate types.
internal override DependencyObjectType DTypeThemeStyleKey
{
get { return _dType; }
}
private static DependencyObjectType _dType;
#endregion DTypeThemeStyleKey
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//---------------------------------------------------------------------------
using MS.Internal;
using MS.Internal.KnownBoxes;
using MS.Utility;
using System.ComponentModel;
using System.Diagnostics;
using System.Windows.Threading;
using System.Windows.Automation.Peers;
using System.Windows.Media;
using System.Windows.Input;
using System.Windows.Controls.Primitives;
using System.Windows.Shapes;
using System;
// Disable CS3001: Warning as Error: not CLS-compliant
#pragma warning disable 3001
namespace System.Windows.Controls
{
///
/// Control that implements a selectable item inside a ListBox.
///
[DefaultEvent("Selected")]
public class ListBoxItem : ContentControl
{
//-------------------------------------------------------------------
//
// Constructors
//
//-------------------------------------------------------------------
#region Constructors
///
/// Default DependencyObject constructor
///
public ListBoxItem() : base()
{
}
static ListBoxItem()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(ListBoxItem), new FrameworkPropertyMetadata(typeof(ListBoxItem)));
_dType = DependencyObjectType.FromSystemTypeInternal(typeof(ListBoxItem));
KeyboardNavigation.DirectionalNavigationProperty.OverrideMetadata(typeof(ListBoxItem), new FrameworkPropertyMetadata(KeyboardNavigationMode.Once));
KeyboardNavigation.TabNavigationProperty.OverrideMetadata(typeof(ListBoxItem), new FrameworkPropertyMetadata(KeyboardNavigationMode.Local));
}
#endregion
//--------------------------------------------------------------------
//
// Public Properties
//
//-------------------------------------------------------------------
#region Public Properties
///
/// Indicates whether this ListBoxItem is selected.
///
public static readonly DependencyProperty IsSelectedProperty =
Selector.IsSelectedProperty.AddOwner(typeof(ListBoxItem),
new FrameworkPropertyMetadata(BooleanBoxes.FalseBox,
FrameworkPropertyMetadataOptions.BindsTwoWayByDefault | FrameworkPropertyMetadataOptions.Journal,
new PropertyChangedCallback(OnIsSelectedChanged)));
///
/// Indicates whether this ListBoxItem is selected.
///
[Bindable(true), Category("Appearance")]
public bool IsSelected
{
get { return (bool) GetValue(IsSelectedProperty); }
set { SetValue(IsSelectedProperty, BooleanBoxes.Box(value)); }
}
private static void OnIsSelectedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ListBoxItem listItem = d as ListBoxItem;
bool isSelected = (bool) e.NewValue;
Selector parentSelector = listItem.ParentSelector;
if (parentSelector != null)
{
parentSelector.RaiseIsSelectedChangedAutomationEvent(listItem, isSelected);
}
if (isSelected)
{
listItem.OnSelected(new RoutedEventArgs(Selector.SelectedEvent, listItem));
}
else
{
listItem.OnUnselected(new RoutedEventArgs(Selector.UnselectedEvent, listItem));
}
}
///
/// Event indicating that the IsSelected property is now true.
///
/// Event arguments
protected virtual void OnSelected(RoutedEventArgs e)
{
HandleIsSelectedChanged(true, e);
}
///
/// Event indicating that the IsSelected property is now false.
///
/// Event arguments
protected virtual void OnUnselected(RoutedEventArgs e)
{
HandleIsSelectedChanged(false, e);
}
private void HandleIsSelectedChanged(bool newValue, RoutedEventArgs e)
{
RaiseEvent(e);
}
#endregion
#region Events
///
/// Raised when the item's IsSelected property becomes true.
///
public static readonly RoutedEvent SelectedEvent = Selector.SelectedEvent.AddOwner(typeof(ListBoxItem));
///
/// Raised when the item's IsSelected property becomes true.
///
public event RoutedEventHandler Selected
{
add
{
AddHandler(SelectedEvent, value);
}
remove
{
RemoveHandler(SelectedEvent, value);
}
}
///
/// Raised when the item's IsSelected property becomes false.
///
public static readonly RoutedEvent UnselectedEvent = Selector.UnselectedEvent.AddOwner(typeof(ListBoxItem));
///
/// Raised when the item's IsSelected property becomes false.
///
public event RoutedEventHandler Unselected
{
add
{
AddHandler(UnselectedEvent, value);
}
remove
{
RemoveHandler(UnselectedEvent, value);
}
}
#endregion
//--------------------------------------------------------------------
//
// Protected Methods
//
//--------------------------------------------------------------------
#region Protected Methods
///
/// Creates AutomationPeer (
protected override AutomationPeer OnCreateAutomationPeer()
{
return new ListBoxItemWrapperAutomationPeer(this);
}
///
/// This is the method that responds to the MouseButtonEvent event.
///
/// Event arguments
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
if (!e.Handled)
{
//
e.Handled = true;
HandleMouseButtonDown(MouseButton.Left);
}
base.OnMouseLeftButtonDown(e);
}
///
/// This is the method that responds to the MouseButtonEvent event.
///
/// Event arguments
protected override void OnMouseRightButtonDown(MouseButtonEventArgs e)
{
if (!e.Handled)
{
//
e.Handled = true;
HandleMouseButtonDown(MouseButton.Right);
}
base.OnMouseRightButtonDown(e);
}
private void HandleMouseButtonDown(MouseButton mouseButton)
{
if (Selector.UiGetIsSelectable(this) && Focus())
{
ListBox parent = ParentListBox;
if (parent != null)
{
parent.NotifyListItemClicked(this, mouseButton);
}
}
}
///
/// Called when IsMouseOver changes on this element.
///
///
protected override void OnMouseEnter(MouseEventArgs e)
{
// abort any drag operation we have queued.
if (parentNotifyDraggedOperation != null)
{
parentNotifyDraggedOperation.Abort();
parentNotifyDraggedOperation = null;
}
if (IsMouseOver)
{
ListBox parent = ParentListBox;
if (parent != null && Mouse.LeftButton == MouseButtonState.Pressed)
{
parent.NotifyListItemMouseDragged(this);
}
}
base.OnMouseEnter(e);
}
///
/// Called when IsMouseOver changes on this element.
///
///
protected override void OnMouseLeave(MouseEventArgs e)
{
// abort any drag operation we have queued.
if (parentNotifyDraggedOperation != null)
{
parentNotifyDraggedOperation.Abort();
parentNotifyDraggedOperation = null;
}
base.OnMouseLeave(e);
}
///
/// Called when the visual parent of this element changes.
///
///
protected internal override void OnVisualParentChanged(DependencyObject oldParent)
{
ItemsControl oldItemsControl = null;
if (VisualTreeHelper.GetParent(this) == null)
{
if (IsKeyboardFocusWithin)
{
// This ListBoxItem had focus but was removed from the tree.
// The normal behavior is for focus to become null, but we would rather that
// focus go to the parent ListBox.
// Use the oldParent to get a reference to the ListBox that this ListBoxItem used to be in.
// The oldParent's ItemsOwner should be the ListBox.
oldItemsControl = ItemsControl.GetItemsOwner(oldParent);
}
}
else
{
// When the item is added to the tree while grouping, the item will need to
// update its IsSelected property. This is currently less optimal than the non-grouped
// case where IsSelected is updated directly on the child because each selected
// child here will have to search the selected items collection (but usually this
// is a small number and will only happen when some style changed and caused everything
// to be re-generated).
Selector selector = ParentSelector;
if (selector != null)
{
if ((selector.ItemContainerGenerator.GroupStyle != null) && !IsSelected)
{
object item = selector.ItemContainerGenerator.ItemFromContainer(this);
if ((item != null) && selector._selectedItems.Contains(item))
{
IsSelected = true;
}
}
}
}
base.OnVisualParentChanged(oldParent);
// If earlier, we decided to set focus to the old parent ListBox, do it here
// after calling base so that the state for IsKeyboardFocusWithin is updated correctly.
if (oldItemsControl != null)
{
oldItemsControl.Focus();
}
}
#endregion
//-------------------------------------------------------------------
//
// Implementation
//
//--------------------------------------------------------------------
#region Implementation
private ListBox ParentListBox
{
get
{
return ParentSelector as ListBox;
}
}
internal Selector ParentSelector
{
get
{
return ItemsControl.ItemsControlFromItemContainer(this) as Selector;
}
}
#endregion
#if OLD_AUTOMATION
// left here for reference only as it is still used by MonthCalendar
///
/// DependencyProperty for SelectionContainer property.
///
internal static readonly DependencyProperty SelectionContainerProperty
= DependencyProperty.RegisterAttached("SelectionContainer", typeof(UIElement), typeof(ListBoxItem),
new FrameworkPropertyMetadata((UIElement)null));
#endif
#region Private Fields
DispatcherOperation parentNotifyDraggedOperation = null;
#endregion
#region DTypeThemeStyleKey
// Returns the DependencyObjectType for the registered ThemeStyleKey's default
// value. Controls will override this method to return approriate types.
internal override DependencyObjectType DTypeThemeStyleKey
{
get { return _dType; }
}
private static DependencyObjectType _dType;
#endregion DTypeThemeStyleKey
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- MimeObjectFactory.cs
- SqlUnionizer.cs
- Odbc32.cs
- TrustManager.cs
- NetSectionGroup.cs
- DataGridColumnHeaderCollection.cs
- DoWhileDesigner.xaml.cs
- GetWinFXPath.cs
- WebPartMenu.cs
- PropertyChangedEventManager.cs
- UrlPropertyAttribute.cs
- CollectionViewSource.cs
- IdentityModelDictionary.cs
- ProfileInfo.cs
- SvcMapFileSerializer.cs
- DefaultAsyncDataDispatcher.cs
- TickBar.cs
- PixelShader.cs
- ConfigsHelper.cs
- ScrollChrome.cs
- _SslSessionsCache.cs
- WmlImageAdapter.cs
- WebPartActionVerb.cs
- BStrWrapper.cs
- CustomLineCap.cs
- DataServiceHostFactory.cs
- ReflectionPermission.cs
- RenameRuleObjectDialog.cs
- RadioButton.cs
- ISFClipboardData.cs
- XmlCountingReader.cs
- GestureRecognizer.cs
- StateManagedCollection.cs
- VarInfo.cs
- ReflectEventDescriptor.cs
- RequestSecurityTokenResponse.cs
- SafeEventLogWriteHandle.cs
- Error.cs
- ColumnMap.cs
- WebReferenceCollection.cs
- VoiceInfo.cs
- RectValueSerializer.cs
- SecurityImpersonationBehavior.cs
- PermissionToken.cs
- BindToObject.cs
- JpegBitmapDecoder.cs
- MimeMapping.cs
- Visitor.cs
- RegexWorker.cs
- FileDialog.cs
- _RegBlobWebProxyDataBuilder.cs
- DbDataReader.cs
- OrCondition.cs
- AutomationEvent.cs
- DataPagerField.cs
- ConfigurationElement.cs
- ClientSection.cs
- TrustLevel.cs
- TemplateAction.cs
- DataContractSerializerSection.cs
- _ConnectOverlappedAsyncResult.cs
- DocumentPaginator.cs
- VisualBasicSettingsHandler.cs
- ExecutionTracker.cs
- DataObject.cs
- TemplateControl.cs
- AndCondition.cs
- MemberRelationshipService.cs
- FlowDocumentView.cs
- ADConnectionHelper.cs
- CopyNodeSetAction.cs
- RowUpdatingEventArgs.cs
- Point3DConverter.cs
- StrongName.cs
- SuppressMessageAttribute.cs
- QueryCacheEntry.cs
- ECDiffieHellmanCng.cs
- UiaCoreApi.cs
- RelationshipNavigation.cs
- TargetControlTypeAttribute.cs
- DocumentEventArgs.cs
- ResourceCategoryAttribute.cs
- OpenFileDialog.cs
- DecoderReplacementFallback.cs
- AxHost.cs
- RegexCapture.cs
- OdbcReferenceCollection.cs
- InsufficientMemoryException.cs
- WebServicesInteroperability.cs
- HtmlControlPersistable.cs
- XmlSerializableServices.cs
- ParameterExpression.cs
- TextBlockAutomationPeer.cs
- RecognizedAudio.cs
- QueryableDataSourceEditData.cs
- SupportsEventValidationAttribute.cs
- MonitorWrapper.cs
- WebEventCodes.cs
- EncodingDataItem.cs
- UTF32Encoding.cs