Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Controls / TabItem.cs / 1407647 / TabItem.cs
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//---------------------------------------------------------------------------
using System;
using System.Diagnostics;
using MS.Internal;
using MS.Internal.KnownBoxes;
using MS.Utility;
using System.Windows.Threading;
using System.ComponentModel;
using System.Windows.Automation;
using System.Windows.Automation.Peers;
using System.Windows.Media;
using System.Windows.Input;
using System.Windows;
using System.Windows.Data;
using System.Windows.Controls.Primitives;
// Disable CS3001: Warning as Error: not CLS-compliant
#pragma warning disable 3001
namespace System.Windows.Controls
{
///
/// A child item of TabControl.
///
[DefaultEvent("IsSelectedChanged")]
public class TabItem : HeaderedContentControl
{
//-------------------------------------------------------------------
//
// Constructors
//
//-------------------------------------------------------------------
#region Constructors
///
/// Default DependencyObject constructor
///
///
/// Automatic determination of current Dispatcher. Use alternative constructor
/// that accepts a Dispatcher for best performance.
///
public TabItem() : base()
{
}
static TabItem()
{
EventManager.RegisterClassHandler(typeof(TabItem), AccessKeyManager.AccessKeyPressedEvent, new AccessKeyPressedEventHandler(OnAccessKeyPressed));
DefaultStyleKeyProperty.OverrideMetadata(typeof(TabItem), new FrameworkPropertyMetadata(typeof(TabItem)));
_dType = DependencyObjectType.FromSystemTypeInternal(typeof(TabItem));
KeyboardNavigation.DirectionalNavigationProperty.OverrideMetadata(typeof(TabItem), new FrameworkPropertyMetadata(KeyboardNavigationMode.Contained));
KeyboardNavigation.TabNavigationProperty.OverrideMetadata(typeof(TabItem), new FrameworkPropertyMetadata(KeyboardNavigationMode.Local));
IsEnabledProperty.OverrideMetadata(typeof(TabItem), new UIPropertyMetadata(new PropertyChangedCallback(OnVisualStatePropertyChanged)));
IsMouseOverPropertyKey.OverrideMetadata(typeof(TabItem), new UIPropertyMetadata(new PropertyChangedCallback(OnVisualStatePropertyChanged)));
}
#endregion
//--------------------------------------------------------------------
//
// Properties
//
//-------------------------------------------------------------------
#region Properties
///
/// Indicates whether this TabItem is selected.
///
public static readonly DependencyProperty IsSelectedProperty =
Selector.IsSelectedProperty.AddOwner(typeof(TabItem),
new FrameworkPropertyMetadata(BooleanBoxes.FalseBox,
FrameworkPropertyMetadataOptions.BindsTwoWayByDefault | FrameworkPropertyMetadataOptions.AffectsParentMeasure | FrameworkPropertyMetadataOptions.Journal,
new PropertyChangedCallback(OnIsSelectedChanged)));
///
/// Indicates whether this TabItem 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)
{
TabItem tabItem = d as TabItem;
bool isSelected = (bool)e.NewValue;
TabControl parentTabControl = tabItem.TabControlParent;
if (parentTabControl != null)
{
parentTabControl.RaiseIsSelectedChangedAutomationEvent(tabItem, isSelected);
}
if (isSelected)
{
tabItem.OnSelected(new RoutedEventArgs(Selector.SelectedEvent, tabItem));
}
else
{
tabItem.OnUnselected(new RoutedEventArgs(Selector.UnselectedEvent, tabItem));
}
// KeyboardNavigation use bounding box reduced with DirectionalNavigationMargin when calculating the next element in directional navigation
// Because TabItem use negative margins some TabItems overlap which would changes the directional navigation if we don't reduce the bounding box
if (isSelected)
{
Binding binding = new Binding("Margin");
binding.Source = tabItem;
BindingOperations.SetBinding(tabItem, KeyboardNavigation.DirectionalNavigationMarginProperty, binding);
}
else
{
BindingOperations.ClearBinding(tabItem, KeyboardNavigation.DirectionalNavigationMarginProperty);
}
tabItem.UpdateVisualState();
}
///
/// 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)
{
#if OLD_AUTOMATION
if (AutomationProvider.IsActive)
{
RaiseAutomationIsSelectedChanged(!newValue, newValue);
}
#endif
RaiseEvent(e);
}
#if OLD_AUTOMATION
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)]
private void RaiseAutomationIsSelectedChanged(bool oldValue, bool newValue)
{
AutomationProvider.RaiseAutomationPropertyChangedEvent(this, SelectionItemPatternIdentifiers.IsSelectedProperty, oldValue, newValue);
}
#endif
#region TabStripPlacement
///
/// Property key for TabStripPlacementProperty.
///
private static readonly DependencyPropertyKey TabStripPlacementPropertyKey =
DependencyProperty.RegisterReadOnly(
"TabStripPlacement",
typeof(Dock),
typeof(TabItem),
new FrameworkPropertyMetadata(
Dock.Top,
null,
new CoerceValueCallback(CoerceTabStripPlacement)));
///
/// Specifies the placement of the TabItem
///
public static readonly DependencyProperty TabStripPlacementProperty =
TabStripPlacementPropertyKey.DependencyProperty;
private static object CoerceTabStripPlacement(DependencyObject d, object value)
{
TabControl tabControl = ((TabItem)d).TabControlParent;
return (tabControl != null) ? tabControl.TabStripPlacement : value;
}
///
/// Specifies the placement of the TabItem. This read-only property get its value from the TabControl parent
///
public Dock TabStripPlacement
{
get
{
return (Dock)GetValue(TabStripPlacementProperty);
}
}
internal override void OnAncestorChanged()
{
// TabStripPlacement depends on the logical parent -- so invalidate it when that changes
CoerceValue(TabStripPlacementProperty);
}
#endregion TabStripPlacement
#endregion
//--------------------------------------------------------------------
//
// Protected Methods
//
//--------------------------------------------------------------------
#region Protected Methods
internal override void ChangeVisualState(bool useTransitions)
{
if (!IsEnabled)
{
VisualStateManager.GoToState(this, VisualStates.StateDisabled, useTransitions);
}
else if (IsMouseOver)
{
VisualStateManager.GoToState(this, VisualStates.StateMouseOver, useTransitions);
}
else
{
VisualStateManager.GoToState(this, VisualStates.StateNormal, useTransitions);
}
// Update the SelectionStates group
if (IsSelected)
{
VisualStates.GoToState(this, useTransitions, VisualStates.StateSelected, VisualStates.StateUnselected);
}
else
{
VisualStateManager.GoToState(this, VisualStates.StateUnselected, useTransitions);
}
if (IsKeyboardFocused)
{
VisualStateManager.GoToState(this, VisualStates.StateFocused, useTransitions);
}
else
{
VisualStateManager.GoToState(this, VisualStates.StateUnfocused, useTransitions);
}
base.ChangeVisualState(useTransitions);
}
///
/// Creates AutomationPeer (
protected override AutomationPeer OnCreateAutomationPeer()
{
return new TabItemWrapperAutomationPeer(this);
}
///
/// This is the method that responds to the MouseLeftButtonDownEvent event.
///
///
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
// We should process only the direct events in case TabItem is the selected one
// otherwise we are getting this event when we click on TabItem content because it is in the logical subtree
if (e.Source == this || !IsSelected)
{
if (SetFocus())
e.Handled = true;
}
base.OnMouseLeftButtonDown(e);
}
///
/// Focus event handler
///
///
protected override void OnPreviewGotKeyboardFocus(KeyboardFocusChangedEventArgs e)
{
base.OnPreviewGotKeyboardFocus(e);
if (!e.Handled && e.NewFocus == this)
{
if (!IsSelected && TabControlParent != null)
{
SetCurrentValueInternal(IsSelectedProperty, BooleanBoxes.TrueBox);
// If focus moved in result of selection - handle the event to prevent setting focus back on the new item
if (e.OldFocus != Keyboard.FocusedElement)
{
e.Handled = true;
}
else if (GetBoolField(BoolField.SetFocusOnContent))
{
TabControl parentTabControl = TabControlParent;
if (parentTabControl != null)
{
// Save the parent and check for null to make sure that SetCurrentValue didn't have a change handler
// that removed the TabItem from the tree.
ContentPresenter selectedContentPresenter = parentTabControl.SelectedContentPresenter;
if (selectedContentPresenter != null)
{
parentTabControl.UpdateLayout(); // Wait for layout
bool success = selectedContentPresenter.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
// If we successfully move focus inside the content then don't set focus to the header
if (success)
e.Handled = true;
}
}
}
}
}
}
///
/// The Access key for this control was invoked.
///
protected override void OnAccessKey(AccessKeyEventArgs e)
{
SetFocus();
}
///
/// This method is invoked when the Content property changes.
///
/// The old value of the Content property.
/// The new value of the Content property.
protected override void OnContentChanged(object oldContent, object newContent)
{
base.OnContentChanged(oldContent, newContent);
// If this is the selected TabItem then we should update TabControl.SelectedContent
if (IsSelected)
{
TabControl tabControl = TabControlParent;
if (tabControl != null)
{
tabControl.SelectedContent = newContent;
}
}
}
///
/// This method is invoked when the ContentTemplate property changes.
///
/// The old value of the ContentTemplate property.
/// The new value of the ContentTemplate property.
protected override void OnContentTemplateChanged(DataTemplate oldContentTemplate, DataTemplate newContentTemplate)
{
base.OnContentTemplateChanged(oldContentTemplate, newContentTemplate);
// If this is the selected TabItem then we should update TabControl.SelectedContentTemplate
if (IsSelected)
{
TabControl tabControl = TabControlParent;
if (tabControl != null)
{
tabControl.SelectedContentTemplate = newContentTemplate;
}
}
}
///
/// This method is invoked when the ContentTemplateSelector property changes.
///
/// The old value of the ContentTemplateSelector property.
/// The new value of the ContentTemplateSelector property.
protected override void OnContentTemplateSelectorChanged(DataTemplateSelector oldContentTemplateSelector, DataTemplateSelector newContentTemplateSelector)
{
base.OnContentTemplateSelectorChanged(oldContentTemplateSelector, newContentTemplateSelector);
// If this is the selected TabItem then we should update TabControl.SelectedContentTemplateSelector
if (IsSelected)
{
TabControl tabControl = TabControlParent;
if (tabControl != null)
{
tabControl.SelectedContentTemplateSelector = newContentTemplateSelector;
}
}
}
#endregion
//-------------------------------------------------------------------
//
// Private Methods
//
//--------------------------------------------------------------------
#region Private Methods
private static void OnAccessKeyPressed(object sender, AccessKeyPressedEventArgs e)
{
if (!e.Handled && e.Scope == null)
{
TabItem tabItem = sender as TabItem;
if (e.Target == null)
{
e.Target = tabItem;
}
else if (!tabItem.IsSelected) // If TabItem is not active it is a scope for its content elements
{
e.Scope = tabItem;
e.Handled = true;
}
}
}
internal bool SetFocus()
{
bool returnValue = false;
if (!GetBoolField(BoolField.SettingFocus))
{
TabItem currentFocus = Keyboard.FocusedElement as TabItem;
// If current focus was another TabItem in the same TabControl - dont set focus on content
bool setFocusOnContent = ((currentFocus == this) || (currentFocus == null) || (currentFocus.TabControlParent != this.TabControlParent));
SetBoolField(BoolField.SettingFocus, true);
SetBoolField(BoolField.SetFocusOnContent, setFocusOnContent);
try
{
returnValue = Focus() || setFocusOnContent;
}
finally
{
SetBoolField(BoolField.SettingFocus, false);
SetBoolField(BoolField.SetFocusOnContent, false);
}
}
return returnValue;
}
private TabControl TabControlParent
{
get
{
return ItemsControl.ItemsControlFromItemContainer(this) as TabControl;
}
}
#endregion
//-------------------------------------------------------------------
//
// Private Fields
//
//-------------------------------------------------------------------
#region Private Fields
private bool GetBoolField(BoolField field)
{
return (_tabItemBoolFieldStore & field) != 0;
}
private void SetBoolField(BoolField field, bool value)
{
if (value)
{
_tabItemBoolFieldStore |= field;
}
else
{
_tabItemBoolFieldStore &= (~field);
}
}
[Flags]
private enum BoolField
{
SetFocusOnContent = 0x10, // This flag determine if we want to set focus on active TabItem content
SettingFocus = 0x20, // This flag indicates that the TabItem is in the process of setting focus
// By default ListBoxItem is selectable
DefaultValue = 0,
}
BoolField _tabItemBoolFieldStore = BoolField.DefaultValue;
#endregion Private Fields
#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 System;
using System.Diagnostics;
using MS.Internal;
using MS.Internal.KnownBoxes;
using MS.Utility;
using System.Windows.Threading;
using System.ComponentModel;
using System.Windows.Automation;
using System.Windows.Automation.Peers;
using System.Windows.Media;
using System.Windows.Input;
using System.Windows;
using System.Windows.Data;
using System.Windows.Controls.Primitives;
// Disable CS3001: Warning as Error: not CLS-compliant
#pragma warning disable 3001
namespace System.Windows.Controls
{
///
/// A child item of TabControl.
///
[DefaultEvent("IsSelectedChanged")]
public class TabItem : HeaderedContentControl
{
//-------------------------------------------------------------------
//
// Constructors
//
//-------------------------------------------------------------------
#region Constructors
///
/// Default DependencyObject constructor
///
///
/// Automatic determination of current Dispatcher. Use alternative constructor
/// that accepts a Dispatcher for best performance.
///
public TabItem() : base()
{
}
static TabItem()
{
EventManager.RegisterClassHandler(typeof(TabItem), AccessKeyManager.AccessKeyPressedEvent, new AccessKeyPressedEventHandler(OnAccessKeyPressed));
DefaultStyleKeyProperty.OverrideMetadata(typeof(TabItem), new FrameworkPropertyMetadata(typeof(TabItem)));
_dType = DependencyObjectType.FromSystemTypeInternal(typeof(TabItem));
KeyboardNavigation.DirectionalNavigationProperty.OverrideMetadata(typeof(TabItem), new FrameworkPropertyMetadata(KeyboardNavigationMode.Contained));
KeyboardNavigation.TabNavigationProperty.OverrideMetadata(typeof(TabItem), new FrameworkPropertyMetadata(KeyboardNavigationMode.Local));
IsEnabledProperty.OverrideMetadata(typeof(TabItem), new UIPropertyMetadata(new PropertyChangedCallback(OnVisualStatePropertyChanged)));
IsMouseOverPropertyKey.OverrideMetadata(typeof(TabItem), new UIPropertyMetadata(new PropertyChangedCallback(OnVisualStatePropertyChanged)));
}
#endregion
//--------------------------------------------------------------------
//
// Properties
//
//-------------------------------------------------------------------
#region Properties
///
/// Indicates whether this TabItem is selected.
///
public static readonly DependencyProperty IsSelectedProperty =
Selector.IsSelectedProperty.AddOwner(typeof(TabItem),
new FrameworkPropertyMetadata(BooleanBoxes.FalseBox,
FrameworkPropertyMetadataOptions.BindsTwoWayByDefault | FrameworkPropertyMetadataOptions.AffectsParentMeasure | FrameworkPropertyMetadataOptions.Journal,
new PropertyChangedCallback(OnIsSelectedChanged)));
///
/// Indicates whether this TabItem 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)
{
TabItem tabItem = d as TabItem;
bool isSelected = (bool)e.NewValue;
TabControl parentTabControl = tabItem.TabControlParent;
if (parentTabControl != null)
{
parentTabControl.RaiseIsSelectedChangedAutomationEvent(tabItem, isSelected);
}
if (isSelected)
{
tabItem.OnSelected(new RoutedEventArgs(Selector.SelectedEvent, tabItem));
}
else
{
tabItem.OnUnselected(new RoutedEventArgs(Selector.UnselectedEvent, tabItem));
}
// KeyboardNavigation use bounding box reduced with DirectionalNavigationMargin when calculating the next element in directional navigation
// Because TabItem use negative margins some TabItems overlap which would changes the directional navigation if we don't reduce the bounding box
if (isSelected)
{
Binding binding = new Binding("Margin");
binding.Source = tabItem;
BindingOperations.SetBinding(tabItem, KeyboardNavigation.DirectionalNavigationMarginProperty, binding);
}
else
{
BindingOperations.ClearBinding(tabItem, KeyboardNavigation.DirectionalNavigationMarginProperty);
}
tabItem.UpdateVisualState();
}
///
/// 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)
{
#if OLD_AUTOMATION
if (AutomationProvider.IsActive)
{
RaiseAutomationIsSelectedChanged(!newValue, newValue);
}
#endif
RaiseEvent(e);
}
#if OLD_AUTOMATION
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)]
private void RaiseAutomationIsSelectedChanged(bool oldValue, bool newValue)
{
AutomationProvider.RaiseAutomationPropertyChangedEvent(this, SelectionItemPatternIdentifiers.IsSelectedProperty, oldValue, newValue);
}
#endif
#region TabStripPlacement
///
/// Property key for TabStripPlacementProperty.
///
private static readonly DependencyPropertyKey TabStripPlacementPropertyKey =
DependencyProperty.RegisterReadOnly(
"TabStripPlacement",
typeof(Dock),
typeof(TabItem),
new FrameworkPropertyMetadata(
Dock.Top,
null,
new CoerceValueCallback(CoerceTabStripPlacement)));
///
/// Specifies the placement of the TabItem
///
public static readonly DependencyProperty TabStripPlacementProperty =
TabStripPlacementPropertyKey.DependencyProperty;
private static object CoerceTabStripPlacement(DependencyObject d, object value)
{
TabControl tabControl = ((TabItem)d).TabControlParent;
return (tabControl != null) ? tabControl.TabStripPlacement : value;
}
///
/// Specifies the placement of the TabItem. This read-only property get its value from the TabControl parent
///
public Dock TabStripPlacement
{
get
{
return (Dock)GetValue(TabStripPlacementProperty);
}
}
internal override void OnAncestorChanged()
{
// TabStripPlacement depends on the logical parent -- so invalidate it when that changes
CoerceValue(TabStripPlacementProperty);
}
#endregion TabStripPlacement
#endregion
//--------------------------------------------------------------------
//
// Protected Methods
//
//--------------------------------------------------------------------
#region Protected Methods
internal override void ChangeVisualState(bool useTransitions)
{
if (!IsEnabled)
{
VisualStateManager.GoToState(this, VisualStates.StateDisabled, useTransitions);
}
else if (IsMouseOver)
{
VisualStateManager.GoToState(this, VisualStates.StateMouseOver, useTransitions);
}
else
{
VisualStateManager.GoToState(this, VisualStates.StateNormal, useTransitions);
}
// Update the SelectionStates group
if (IsSelected)
{
VisualStates.GoToState(this, useTransitions, VisualStates.StateSelected, VisualStates.StateUnselected);
}
else
{
VisualStateManager.GoToState(this, VisualStates.StateUnselected, useTransitions);
}
if (IsKeyboardFocused)
{
VisualStateManager.GoToState(this, VisualStates.StateFocused, useTransitions);
}
else
{
VisualStateManager.GoToState(this, VisualStates.StateUnfocused, useTransitions);
}
base.ChangeVisualState(useTransitions);
}
///
/// Creates AutomationPeer (
protected override AutomationPeer OnCreateAutomationPeer()
{
return new TabItemWrapperAutomationPeer(this);
}
///
/// This is the method that responds to the MouseLeftButtonDownEvent event.
///
///
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
// We should process only the direct events in case TabItem is the selected one
// otherwise we are getting this event when we click on TabItem content because it is in the logical subtree
if (e.Source == this || !IsSelected)
{
if (SetFocus())
e.Handled = true;
}
base.OnMouseLeftButtonDown(e);
}
///
/// Focus event handler
///
///
protected override void OnPreviewGotKeyboardFocus(KeyboardFocusChangedEventArgs e)
{
base.OnPreviewGotKeyboardFocus(e);
if (!e.Handled && e.NewFocus == this)
{
if (!IsSelected && TabControlParent != null)
{
SetCurrentValueInternal(IsSelectedProperty, BooleanBoxes.TrueBox);
// If focus moved in result of selection - handle the event to prevent setting focus back on the new item
if (e.OldFocus != Keyboard.FocusedElement)
{
e.Handled = true;
}
else if (GetBoolField(BoolField.SetFocusOnContent))
{
TabControl parentTabControl = TabControlParent;
if (parentTabControl != null)
{
// Save the parent and check for null to make sure that SetCurrentValue didn't have a change handler
// that removed the TabItem from the tree.
ContentPresenter selectedContentPresenter = parentTabControl.SelectedContentPresenter;
if (selectedContentPresenter != null)
{
parentTabControl.UpdateLayout(); // Wait for layout
bool success = selectedContentPresenter.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
// If we successfully move focus inside the content then don't set focus to the header
if (success)
e.Handled = true;
}
}
}
}
}
}
///
/// The Access key for this control was invoked.
///
protected override void OnAccessKey(AccessKeyEventArgs e)
{
SetFocus();
}
///
/// This method is invoked when the Content property changes.
///
/// The old value of the Content property.
/// The new value of the Content property.
protected override void OnContentChanged(object oldContent, object newContent)
{
base.OnContentChanged(oldContent, newContent);
// If this is the selected TabItem then we should update TabControl.SelectedContent
if (IsSelected)
{
TabControl tabControl = TabControlParent;
if (tabControl != null)
{
tabControl.SelectedContent = newContent;
}
}
}
///
/// This method is invoked when the ContentTemplate property changes.
///
/// The old value of the ContentTemplate property.
/// The new value of the ContentTemplate property.
protected override void OnContentTemplateChanged(DataTemplate oldContentTemplate, DataTemplate newContentTemplate)
{
base.OnContentTemplateChanged(oldContentTemplate, newContentTemplate);
// If this is the selected TabItem then we should update TabControl.SelectedContentTemplate
if (IsSelected)
{
TabControl tabControl = TabControlParent;
if (tabControl != null)
{
tabControl.SelectedContentTemplate = newContentTemplate;
}
}
}
///
/// This method is invoked when the ContentTemplateSelector property changes.
///
/// The old value of the ContentTemplateSelector property.
/// The new value of the ContentTemplateSelector property.
protected override void OnContentTemplateSelectorChanged(DataTemplateSelector oldContentTemplateSelector, DataTemplateSelector newContentTemplateSelector)
{
base.OnContentTemplateSelectorChanged(oldContentTemplateSelector, newContentTemplateSelector);
// If this is the selected TabItem then we should update TabControl.SelectedContentTemplateSelector
if (IsSelected)
{
TabControl tabControl = TabControlParent;
if (tabControl != null)
{
tabControl.SelectedContentTemplateSelector = newContentTemplateSelector;
}
}
}
#endregion
//-------------------------------------------------------------------
//
// Private Methods
//
//--------------------------------------------------------------------
#region Private Methods
private static void OnAccessKeyPressed(object sender, AccessKeyPressedEventArgs e)
{
if (!e.Handled && e.Scope == null)
{
TabItem tabItem = sender as TabItem;
if (e.Target == null)
{
e.Target = tabItem;
}
else if (!tabItem.IsSelected) // If TabItem is not active it is a scope for its content elements
{
e.Scope = tabItem;
e.Handled = true;
}
}
}
internal bool SetFocus()
{
bool returnValue = false;
if (!GetBoolField(BoolField.SettingFocus))
{
TabItem currentFocus = Keyboard.FocusedElement as TabItem;
// If current focus was another TabItem in the same TabControl - dont set focus on content
bool setFocusOnContent = ((currentFocus == this) || (currentFocus == null) || (currentFocus.TabControlParent != this.TabControlParent));
SetBoolField(BoolField.SettingFocus, true);
SetBoolField(BoolField.SetFocusOnContent, setFocusOnContent);
try
{
returnValue = Focus() || setFocusOnContent;
}
finally
{
SetBoolField(BoolField.SettingFocus, false);
SetBoolField(BoolField.SetFocusOnContent, false);
}
}
return returnValue;
}
private TabControl TabControlParent
{
get
{
return ItemsControl.ItemsControlFromItemContainer(this) as TabControl;
}
}
#endregion
//-------------------------------------------------------------------
//
// Private Fields
//
//-------------------------------------------------------------------
#region Private Fields
private bool GetBoolField(BoolField field)
{
return (_tabItemBoolFieldStore & field) != 0;
}
private void SetBoolField(BoolField field, bool value)
{
if (value)
{
_tabItemBoolFieldStore |= field;
}
else
{
_tabItemBoolFieldStore &= (~field);
}
}
[Flags]
private enum BoolField
{
SetFocusOnContent = 0x10, // This flag determine if we want to set focus on active TabItem content
SettingFocus = 0x20, // This flag indicates that the TabItem is in the process of setting focus
// By default ListBoxItem is selectable
DefaultValue = 0,
}
BoolField _tabItemBoolFieldStore = BoolField.DefaultValue;
#endregion Private Fields
#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.
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- DetailsView.cs
- SQLDateTime.cs
- MachineKeySection.cs
- SecurityPolicySection.cs
- OutputCacheSettings.cs
- DBSchemaRow.cs
- PerformanceCounter.cs
- TableCellAutomationPeer.cs
- DataControlImageButton.cs
- sqlstateclientmanager.cs
- FileSystemInfo.cs
- DefaultAuthorizationContext.cs
- QueryAccessibilityHelpEvent.cs
- FixedNode.cs
- NetworkInformationException.cs
- NTAccount.cs
- ListViewEditEventArgs.cs
- RequestTimeoutManager.cs
- SqlProfileProvider.cs
- HttpHandlerAction.cs
- XmlNodeChangedEventArgs.cs
- ProcessHostConfigUtils.cs
- CollectionType.cs
- LastQueryOperator.cs
- FileSystemWatcher.cs
- HttpModulesSection.cs
- ConnectionProviderAttribute.cs
- PenCursorManager.cs
- ReadOnlyNameValueCollection.cs
- ImmComposition.cs
- HtmlContainerControl.cs
- Logging.cs
- Missing.cs
- WebConfigurationManager.cs
- ZoomPercentageConverter.cs
- StructuredCompositeActivityDesigner.cs
- SoapEnumAttribute.cs
- FunctionDetailsReader.cs
- LinkTarget.cs
- SqlStatistics.cs
- ContainerTracking.cs
- HttpException.cs
- ColorConverter.cs
- DataGridViewCheckBoxCell.cs
- Page.cs
- ConsoleTraceListener.cs
- AQNBuilder.cs
- TableLayoutSettings.cs
- SqlDependency.cs
- GeneralTransform3DGroup.cs
- MultiView.cs
- CapabilitiesRule.cs
- regiisutil.cs
- SerializationAttributes.cs
- Internal.cs
- PeerNameRecordCollection.cs
- StringUtil.cs
- SemaphoreSlim.cs
- HostSecurityManager.cs
- ThumbAutomationPeer.cs
- MeasureItemEvent.cs
- CompilerParameters.cs
- ObfuscationAttribute.cs
- DrawingContextDrawingContextWalker.cs
- ConnectionPoint.cs