Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Core / CSharp / System / Windows / ReverseInheritProperty.cs / 1 / ReverseInheritProperty.cs
using System;
using System.Collections;
using System.Windows.Media;
using System.Windows.Input;
using MS.Internal;
namespace System.Windows
{
internal abstract class ReverseInheritProperty
{
internal ReverseInheritProperty(
DependencyPropertyKey flagKey,
CoreFlags flagCache,
CoreFlags flagChanged)
{
FlagKey = flagKey;
FlagCache = flagCache;
FlagChanged = flagChanged;
}
internal abstract void FireNotifications(UIElement uie, ContentElement ce, UIElement3D uie3D, bool oldValue);
internal void OnOriginValueChanged(DependencyObject oldOrigin, DependencyObject newOrigin, ref DeferredElementTreeState oldTreeState)
{
DeferredElementTreeState treeStateLocalCopy = oldTreeState;
oldTreeState = null;
// Step #1
// Update the cache flags for all elements in the ancestry
// of the element that got turned off and record the changed nodes
if (oldOrigin != null)
{
SetCacheFlagInAncestry(oldOrigin, false, treeStateLocalCopy);
}
// Step #2
// Update the cache flags for all elements in the ancestry
// of the element that got turned on and record the changed nodes
if (newOrigin != null)
{
SetCacheFlagInAncestry(newOrigin, true, null);
}
// Step #3
// Fire value changed on elements in the ancestry of the element that got turned off.
if (oldOrigin != null)
{
FirePropertyChangeInAncestry(oldOrigin, true /* oldValue */, treeStateLocalCopy);
}
// Step #4
// Fire value changed on elements in the ancestry of the element that got turned on.
if (newOrigin != null)
{
FirePropertyChangeInAncestry(newOrigin, false /* oldValue */, null);
}
if (oldTreeState == null && treeStateLocalCopy != null)
{
// Now that we have applied the old tree state, throw it away.
treeStateLocalCopy.Clear();
oldTreeState = treeStateLocalCopy;
}
}
void SetCacheFlagInAncestry(DependencyObject element, bool newValue, DeferredElementTreeState treeState)
{
// If the cache flag value is undergoing change, record it and
// propagate the change to the ancestors.
if ((!newValue && IsFlagSet(element, FlagCache)) ||
(newValue && !IsFlagSet(element, FlagCache)))
{
SetFlag(element, FlagCache, newValue);
// NOTE: we toggle the changed flag instead of setting it so that that way common
// ancestors show resultant unchanged and do not receive any change notification.
SetFlag(element, FlagChanged, !IsFlagSet(element, FlagChanged));
// Check for block reverse inheritance flag, elements like popup want to set this.
{
UIElement uie = element as UIElement;
if (uie != null)
{
if (uie.BlockReverseInheritance())
{
return;
}
}
ContentElement ce = element as ContentElement;
if (ce != null)
{
if (ce.BlockReverseInheritance())
{
return;
}
}
UIElement3D ui3D = element as UIElement3D;
if (ui3D != null)
{
if (ui3D.BlockReverseInheritance())
{
return;
}
}
}
// Propagate the flag up the visual and logical trees. Note our
// minimal optimization check to avoid walking both the core
// and logical parents if they are the same.
{
DependencyObject coreParent = DeferredElementTreeState.GetInputElementParent(element, treeState);
DependencyObject logicalParent = DeferredElementTreeState.GetLogicalParent(element, treeState);
if (coreParent != null)
{
SetCacheFlagInAncestry(coreParent, newValue, treeState);
}
if (logicalParent != null && logicalParent != coreParent)
{
SetCacheFlagInAncestry(logicalParent, newValue, treeState);
}
}
}
}
void FirePropertyChangeInAncestry(DependencyObject element, bool oldValue, DeferredElementTreeState treeState)
{
// If the cache value on the owner has been changed fire changed event
if (IsFlagSet(element, FlagChanged))
{
SetFlag(element, FlagChanged, false);
if (oldValue)
{
element.ClearValue(FlagKey);
}
else
{
element.SetValue(FlagKey, true);
}
UIElement uie = element as UIElement;
ContentElement ce = (uie != null) ? null : element as ContentElement;
UIElement3D uie3D = (uie != null || ce != null) ? null : element as UIElement3D;
FireNotifications(uie, ce, uie3D, oldValue);
// Check for block reverse inheritance flag, elements like popup want to set this.
if (uie != null)
{
if (uie.BlockReverseInheritance())
{
return;
}
}
else if (ce != null)
{
if (ce.BlockReverseInheritance())
{
return;
}
}
else if (uie3D != null)
{
if (uie3D.BlockReverseInheritance())
{
return;
}
}
// Call FirePropertyChange up the visual and logical trees.
// Note our minimal optimization check to avoid walking both
// the core and logical parents if they are the same.
{
DependencyObject coreParent = DeferredElementTreeState.GetInputElementParent(element, treeState);
DependencyObject logicalParent = DeferredElementTreeState.GetLogicalParent(element, treeState);
if (coreParent != null)
{
FirePropertyChangeInAncestry(coreParent, oldValue, treeState);
}
if (logicalParent != null && logicalParent != coreParent)
{
FirePropertyChangeInAncestry(logicalParent, oldValue, treeState);
}
}
}
}
/////////////////////////////////////////////////////////////////////
void SetFlag(DependencyObject o, CoreFlags flag, bool value)
{
UIElement uie = o as UIElement;
ContentElement ce = (uie != null) ? null : o as ContentElement;
UIElement3D uie3D = (uie != null || ce != null) ? null : o as UIElement3D;
if (uie != null)
{
uie.WriteFlag(flag, value);
}
else if (ce != null)
{
ce.WriteFlag(flag, value);
}
else if (uie3D != null)
{
uie3D.WriteFlag(flag, value);
}
}
/////////////////////////////////////////////////////////////////////
bool IsFlagSet(DependencyObject o, CoreFlags flag)
{
UIElement uie = o as UIElement;
ContentElement ce = (uie != null) ? null : o as ContentElement;
UIElement3D uie3D = (uie != null || ce != null) ? null : o as UIElement3D;
if (uie != null)
{
return uie.ReadFlag(flag);
}
else if (ce != null)
{
return ce.ReadFlag(flag);
}
else if (uie3D != null)
{
return uie3D.ReadFlag(flag);
}
return false;
}
/////////////////////////////////////////////////////////////////////
internal DependencyPropertyKey FlagKey;
internal CoreFlags FlagCache, FlagChanged;
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
using System;
using System.Collections;
using System.Windows.Media;
using System.Windows.Input;
using MS.Internal;
namespace System.Windows
{
internal abstract class ReverseInheritProperty
{
internal ReverseInheritProperty(
DependencyPropertyKey flagKey,
CoreFlags flagCache,
CoreFlags flagChanged)
{
FlagKey = flagKey;
FlagCache = flagCache;
FlagChanged = flagChanged;
}
internal abstract void FireNotifications(UIElement uie, ContentElement ce, UIElement3D uie3D, bool oldValue);
internal void OnOriginValueChanged(DependencyObject oldOrigin, DependencyObject newOrigin, ref DeferredElementTreeState oldTreeState)
{
DeferredElementTreeState treeStateLocalCopy = oldTreeState;
oldTreeState = null;
// Step #1
// Update the cache flags for all elements in the ancestry
// of the element that got turned off and record the changed nodes
if (oldOrigin != null)
{
SetCacheFlagInAncestry(oldOrigin, false, treeStateLocalCopy);
}
// Step #2
// Update the cache flags for all elements in the ancestry
// of the element that got turned on and record the changed nodes
if (newOrigin != null)
{
SetCacheFlagInAncestry(newOrigin, true, null);
}
// Step #3
// Fire value changed on elements in the ancestry of the element that got turned off.
if (oldOrigin != null)
{
FirePropertyChangeInAncestry(oldOrigin, true /* oldValue */, treeStateLocalCopy);
}
// Step #4
// Fire value changed on elements in the ancestry of the element that got turned on.
if (newOrigin != null)
{
FirePropertyChangeInAncestry(newOrigin, false /* oldValue */, null);
}
if (oldTreeState == null && treeStateLocalCopy != null)
{
// Now that we have applied the old tree state, throw it away.
treeStateLocalCopy.Clear();
oldTreeState = treeStateLocalCopy;
}
}
void SetCacheFlagInAncestry(DependencyObject element, bool newValue, DeferredElementTreeState treeState)
{
// If the cache flag value is undergoing change, record it and
// propagate the change to the ancestors.
if ((!newValue && IsFlagSet(element, FlagCache)) ||
(newValue && !IsFlagSet(element, FlagCache)))
{
SetFlag(element, FlagCache, newValue);
// NOTE: we toggle the changed flag instead of setting it so that that way common
// ancestors show resultant unchanged and do not receive any change notification.
SetFlag(element, FlagChanged, !IsFlagSet(element, FlagChanged));
// Check for block reverse inheritance flag, elements like popup want to set this.
{
UIElement uie = element as UIElement;
if (uie != null)
{
if (uie.BlockReverseInheritance())
{
return;
}
}
ContentElement ce = element as ContentElement;
if (ce != null)
{
if (ce.BlockReverseInheritance())
{
return;
}
}
UIElement3D ui3D = element as UIElement3D;
if (ui3D != null)
{
if (ui3D.BlockReverseInheritance())
{
return;
}
}
}
// Propagate the flag up the visual and logical trees. Note our
// minimal optimization check to avoid walking both the core
// and logical parents if they are the same.
{
DependencyObject coreParent = DeferredElementTreeState.GetInputElementParent(element, treeState);
DependencyObject logicalParent = DeferredElementTreeState.GetLogicalParent(element, treeState);
if (coreParent != null)
{
SetCacheFlagInAncestry(coreParent, newValue, treeState);
}
if (logicalParent != null && logicalParent != coreParent)
{
SetCacheFlagInAncestry(logicalParent, newValue, treeState);
}
}
}
}
void FirePropertyChangeInAncestry(DependencyObject element, bool oldValue, DeferredElementTreeState treeState)
{
// If the cache value on the owner has been changed fire changed event
if (IsFlagSet(element, FlagChanged))
{
SetFlag(element, FlagChanged, false);
if (oldValue)
{
element.ClearValue(FlagKey);
}
else
{
element.SetValue(FlagKey, true);
}
UIElement uie = element as UIElement;
ContentElement ce = (uie != null) ? null : element as ContentElement;
UIElement3D uie3D = (uie != null || ce != null) ? null : element as UIElement3D;
FireNotifications(uie, ce, uie3D, oldValue);
// Check for block reverse inheritance flag, elements like popup want to set this.
if (uie != null)
{
if (uie.BlockReverseInheritance())
{
return;
}
}
else if (ce != null)
{
if (ce.BlockReverseInheritance())
{
return;
}
}
else if (uie3D != null)
{
if (uie3D.BlockReverseInheritance())
{
return;
}
}
// Call FirePropertyChange up the visual and logical trees.
// Note our minimal optimization check to avoid walking both
// the core and logical parents if they are the same.
{
DependencyObject coreParent = DeferredElementTreeState.GetInputElementParent(element, treeState);
DependencyObject logicalParent = DeferredElementTreeState.GetLogicalParent(element, treeState);
if (coreParent != null)
{
FirePropertyChangeInAncestry(coreParent, oldValue, treeState);
}
if (logicalParent != null && logicalParent != coreParent)
{
FirePropertyChangeInAncestry(logicalParent, oldValue, treeState);
}
}
}
}
/////////////////////////////////////////////////////////////////////
void SetFlag(DependencyObject o, CoreFlags flag, bool value)
{
UIElement uie = o as UIElement;
ContentElement ce = (uie != null) ? null : o as ContentElement;
UIElement3D uie3D = (uie != null || ce != null) ? null : o as UIElement3D;
if (uie != null)
{
uie.WriteFlag(flag, value);
}
else if (ce != null)
{
ce.WriteFlag(flag, value);
}
else if (uie3D != null)
{
uie3D.WriteFlag(flag, value);
}
}
/////////////////////////////////////////////////////////////////////
bool IsFlagSet(DependencyObject o, CoreFlags flag)
{
UIElement uie = o as UIElement;
ContentElement ce = (uie != null) ? null : o as ContentElement;
UIElement3D uie3D = (uie != null || ce != null) ? null : o as UIElement3D;
if (uie != null)
{
return uie.ReadFlag(flag);
}
else if (ce != null)
{
return ce.ReadFlag(flag);
}
else if (uie3D != null)
{
return uie3D.ReadFlag(flag);
}
return false;
}
/////////////////////////////////////////////////////////////////////
internal DependencyPropertyKey FlagKey;
internal CoreFlags FlagCache, FlagChanged;
}
}
// 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
- CopyAction.cs
- input.cs
- InstanceValue.cs
- XsltInput.cs
- ClientEventManager.cs
- LineGeometry.cs
- EnumType.cs
- CharAnimationBase.cs
- ForwardPositionQuery.cs
- GridItemPatternIdentifiers.cs
- UIElementParagraph.cs
- ClientTargetCollection.cs
- Menu.cs
- Overlapped.cs
- OlePropertyStructs.cs
- RequestContext.cs
- PlacementWorkspace.cs
- _IPv4Address.cs
- FlowDocumentPageViewerAutomationPeer.cs
- HtmlEncodedRawTextWriter.cs
- CssClassPropertyAttribute.cs
- FaultHandlingFilter.cs
- TokenBasedSetEnumerator.cs
- InstanceStore.cs
- CompilerInfo.cs
- ActivityBindForm.cs
- XpsFilter.cs
- FormDocumentDesigner.cs
- RelationshipWrapper.cs
- CellConstant.cs
- TraceHandlerErrorFormatter.cs
- HiddenField.cs
- SqlCommand.cs
- IPHostEntry.cs
- WizardStepBase.cs
- TextElementEnumerator.cs
- AssemblyResourceLoader.cs
- EmbossBitmapEffect.cs
- SoapClientMessage.cs
- StringSorter.cs
- EventToken.cs
- CodeSubDirectoriesCollection.cs
- UnmanagedMarshal.cs
- AutomationElementCollection.cs
- DisplayInformation.cs
- DbReferenceCollection.cs
- MatrixTransform.cs
- TrackingStringDictionary.cs
- COM2PropertyBuilderUITypeEditor.cs
- ReflectionTypeLoadException.cs
- DecoratedNameAttribute.cs
- MarkupProperty.cs
- ArrayList.cs
- IgnoreFileBuildProvider.cs
- Validator.cs
- CompiledQueryCacheKey.cs
- SystemGatewayIPAddressInformation.cs
- BitFlagsGenerator.cs
- TargetFrameworkUtil.cs
- NativeMethods.cs
- ScaleTransform.cs
- AQNBuilder.cs
- WindowsSysHeader.cs
- RadioButtonStandardAdapter.cs
- DirectoryRedirect.cs
- TransactionFlowOption.cs
- _TimerThread.cs
- TextProviderWrapper.cs
- HttpVersion.cs
- CodeIterationStatement.cs
- ZipIOCentralDirectoryDigitalSignature.cs
- iisPickupDirectory.cs
- Parameter.cs
- BitmapPalettes.cs
- ListViewPagedDataSource.cs
- EntryPointNotFoundException.cs
- TextViewBase.cs
- FileDialog_Vista_Interop.cs
- XmlElementAttributes.cs
- WebPartConnectionCollection.cs
- ConsoleKeyInfo.cs
- SignedXml.cs
- LineBreakRecord.cs
- SystemInfo.cs
- WindowsImpersonationContext.cs
- DataSourceHelper.cs
- CachedCompositeFamily.cs
- SqlClientFactory.cs
- SqlDataSourceDesigner.cs
- AssertSection.cs
- SessionSwitchEventArgs.cs
- EtwTrace.cs
- WebPartConnectionsCancelEventArgs.cs
- ToolStripRendererSwitcher.cs
- TableItemProviderWrapper.cs
- BinaryObjectReader.cs
- Semaphore.cs
- EventLogConfiguration.cs
- Compensate.cs
- PasswordDeriveBytes.cs