Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Framework / System / Windows / TriggerAction.cs / 1 / TriggerAction.cs
/****************************************************************************\ * * File: TriggerAction.cs * * A TriggerAction is stored within a Trigger object as one of the actions to * be performed by that trigger. A Trigger object is similar to an if/then * statement, and by that analogy a TriggerActionCollection is the entire * "then" block of the Trigger, and a TriggerAction is a single line within * the "then" block. * * Copyright (C) by Microsoft Corporation. All rights reserved. * \***************************************************************************/ using System; using MS.Internal; namespace System.Windows { ////// A class that describes an action to perform for a trigger /// public abstract class TriggerAction : DependencyObject { ////// Internal constructor - nobody is supposed to ever create an instance /// of this class. Use a derived class instead. /// internal TriggerAction() { } ////// Called when all conditions have been satisfied for this action to be /// invoked. (Conditions are not described on this TriggerAction object, /// but on the Trigger object holding it.) /// ////// This variant is called when the Trigger lives in a Style, and /// hence given a reference to its corresponding Style object. /// internal abstract void Invoke( FrameworkElement fe, FrameworkContentElement fce, Style targetStyle, FrameworkTemplate targetTemplate, Int64 layer); ////// Called when all conditions have been satisfied for this action to be /// invoked. (Conditions are not described on this TriggerAction object, /// but on the Trigger object holding it.) /// ////// This variant is called when the Trigger lives on an element, as /// opposed to Style, so it is given only the reference to the element. /// internal abstract void Invoke( FrameworkElement fe ); ////// The EventTrigger object that contains this action. /// ////// A TriggerAction may need to get back to the Trigger that /// holds it, this is the back-link to allow that. Also, this allows /// us to verify that each TriggerAction is associated with one and /// only one Trigger. /// internal TriggerBase ContainingTrigger { get { return _containingTrigger; } } ////// Seal this TriggerAction to prevent further updates /// ////// TriggerActionCollection will call this method to seal individual /// TriggerAction objects. We do some check here then call the /// parameter-less Seal() so subclasses can also do what they need to do. /// internal void Seal( TriggerBase containingTrigger ) { if( IsSealed && containingTrigger != _containingTrigger ) { throw new InvalidOperationException(SR.Get(SRID.TriggerActionMustBelongToASingleTrigger)); } _containingTrigger = containingTrigger; Seal(); } ////// A derived class overrideing Seal() should set object state such /// that further changes are not allowed. This is also a time to make /// validation checks to see if all parameters make sense. /// internal override void Seal() { if( IsSealed ) { throw new InvalidOperationException(SR.Get(SRID.TriggerActionAlreadySealed)); } base.Seal(); } ////// Checks sealed status and throws exception if object is sealed /// internal void CheckSealed() { if( IsSealed ) { throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "TriggerAction")); } } // Define the DO's inheritance context internal override DependencyObject InheritanceContext { get { return _inheritanceContext; } } // Receive a new inheritance context (this will be a FE/FCE) internal override void AddInheritanceContext(DependencyObject context, DependencyProperty property) { InheritanceContextHelper.AddInheritanceContext(context, this, ref _hasMultipleInheritanceContexts, ref _inheritanceContext); } // Remove an inheritance context (this will be a FE/FCE) internal override void RemoveInheritanceContext(DependencyObject context, DependencyProperty property) { InheritanceContextHelper.RemoveInheritanceContext(context, this, ref _hasMultipleInheritanceContexts, ref _inheritanceContext); } ////// Says if the current instance has multiple InheritanceContexts /// internal override bool HasMultipleInheritanceContexts { get { return _hasMultipleInheritanceContexts; } } private TriggerBase _containingTrigger = null; // Fields to implement DO's inheritance context private DependencyObject _inheritanceContext = null; private bool _hasMultipleInheritanceContexts = false; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. /****************************************************************************\ * * File: TriggerAction.cs * * A TriggerAction is stored within a Trigger object as one of the actions to * be performed by that trigger. A Trigger object is similar to an if/then * statement, and by that analogy a TriggerActionCollection is the entire * "then" block of the Trigger, and a TriggerAction is a single line within * the "then" block. * * Copyright (C) by Microsoft Corporation. All rights reserved. * \***************************************************************************/ using System; using MS.Internal; namespace System.Windows { ////// A class that describes an action to perform for a trigger /// public abstract class TriggerAction : DependencyObject { ////// Internal constructor - nobody is supposed to ever create an instance /// of this class. Use a derived class instead. /// internal TriggerAction() { } ////// Called when all conditions have been satisfied for this action to be /// invoked. (Conditions are not described on this TriggerAction object, /// but on the Trigger object holding it.) /// ////// This variant is called when the Trigger lives in a Style, and /// hence given a reference to its corresponding Style object. /// internal abstract void Invoke( FrameworkElement fe, FrameworkContentElement fce, Style targetStyle, FrameworkTemplate targetTemplate, Int64 layer); ////// Called when all conditions have been satisfied for this action to be /// invoked. (Conditions are not described on this TriggerAction object, /// but on the Trigger object holding it.) /// ////// This variant is called when the Trigger lives on an element, as /// opposed to Style, so it is given only the reference to the element. /// internal abstract void Invoke( FrameworkElement fe ); ////// The EventTrigger object that contains this action. /// ////// A TriggerAction may need to get back to the Trigger that /// holds it, this is the back-link to allow that. Also, this allows /// us to verify that each TriggerAction is associated with one and /// only one Trigger. /// internal TriggerBase ContainingTrigger { get { return _containingTrigger; } } ////// Seal this TriggerAction to prevent further updates /// ////// TriggerActionCollection will call this method to seal individual /// TriggerAction objects. We do some check here then call the /// parameter-less Seal() so subclasses can also do what they need to do. /// internal void Seal( TriggerBase containingTrigger ) { if( IsSealed && containingTrigger != _containingTrigger ) { throw new InvalidOperationException(SR.Get(SRID.TriggerActionMustBelongToASingleTrigger)); } _containingTrigger = containingTrigger; Seal(); } ////// A derived class overrideing Seal() should set object state such /// that further changes are not allowed. This is also a time to make /// validation checks to see if all parameters make sense. /// internal override void Seal() { if( IsSealed ) { throw new InvalidOperationException(SR.Get(SRID.TriggerActionAlreadySealed)); } base.Seal(); } ////// Checks sealed status and throws exception if object is sealed /// internal void CheckSealed() { if( IsSealed ) { throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "TriggerAction")); } } // Define the DO's inheritance context internal override DependencyObject InheritanceContext { get { return _inheritanceContext; } } // Receive a new inheritance context (this will be a FE/FCE) internal override void AddInheritanceContext(DependencyObject context, DependencyProperty property) { InheritanceContextHelper.AddInheritanceContext(context, this, ref _hasMultipleInheritanceContexts, ref _inheritanceContext); } // Remove an inheritance context (this will be a FE/FCE) internal override void RemoveInheritanceContext(DependencyObject context, DependencyProperty property) { InheritanceContextHelper.RemoveInheritanceContext(context, this, ref _hasMultipleInheritanceContexts, ref _inheritanceContext); } ////// Says if the current instance has multiple InheritanceContexts /// internal override bool HasMultipleInheritanceContexts { get { return _hasMultipleInheritanceContexts; } } private TriggerBase _containingTrigger = null; // Fields to implement DO's inheritance context private DependencyObject _inheritanceContext = null; private bool _hasMultipleInheritanceContexts = false; } } // 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
- WebServiceBindingAttribute.cs
- CacheAxisQuery.cs
- panel.cs
- LoadWorkflowByKeyAsyncResult.cs
- ObjectItemNoOpAssemblyLoader.cs
- StorageTypeMapping.cs
- MediaPlayer.cs
- ProfileServiceManager.cs
- EventData.cs
- XmlAnyElementAttributes.cs
- ContentPropertyAttribute.cs
- RuleInfoComparer.cs
- XmlBinaryWriter.cs
- SvcMapFile.cs
- LogicalExpressionTypeConverter.cs
- TargetPerspective.cs
- UrlMappingsModule.cs
- KerberosRequestorSecurityTokenAuthenticator.cs
- CqlParserHelpers.cs
- Crc32.cs
- HwndHost.cs
- MetafileHeader.cs
- OperandQuery.cs
- VideoDrawing.cs
- PathData.cs
- ServiceEndpointAssociationProvider.cs
- OutputWindow.cs
- ErasingStroke.cs
- FlowDocumentPageViewerAutomationPeer.cs
- UserMapPath.cs
- EntityDesignerBuildProvider.cs
- PerspectiveCamera.cs
- PasswordDeriveBytes.cs
- SystemBrushes.cs
- DataGridViewColumnEventArgs.cs
- HuffmanTree.cs
- TimeSpanValidator.cs
- PropertyItemInternal.cs
- TreeNodeCollectionEditor.cs
- MimeTypeAttribute.cs
- ExceptionCollection.cs
- SystemResourceKey.cs
- MessageFilter.cs
- ChangeTracker.cs
- UnmanagedMarshal.cs
- Subset.cs
- SchemaAttDef.cs
- SetStoryboardSpeedRatio.cs
- XslVisitor.cs
- FieldInfo.cs
- IPAddressCollection.cs
- LambdaCompiler.Expressions.cs
- ManagementPath.cs
- LayoutSettings.cs
- TargetControlTypeAttribute.cs
- WebBrowserNavigatingEventHandler.cs
- RequestCache.cs
- ListChangedEventArgs.cs
- ClientTarget.cs
- DataColumn.cs
- ErrorWrapper.cs
- Guid.cs
- SQLInt64Storage.cs
- XmlSchemaAttributeGroupRef.cs
- COM2ExtendedTypeConverter.cs
- CompiledAction.cs
- ObjectToIdCache.cs
- VectorConverter.cs
- FlowLayoutPanelDesigner.cs
- CommandEventArgs.cs
- ImageConverter.cs
- ToolStripManager.cs
- TimeStampChecker.cs
- SynchronizedPool.cs
- CrossSiteScriptingValidation.cs
- Size3D.cs
- Adorner.cs
- ReadOnlyHierarchicalDataSource.cs
- Transform3DGroup.cs
- ByteRangeDownloader.cs
- ViewKeyConstraint.cs
- ReferenceService.cs
- AuthenticationConfig.cs
- InvokeGenerator.cs
- PersonalizationProviderCollection.cs
- WindowPatternIdentifiers.cs
- TypedTableGenerator.cs
- InstanceKeyCompleteException.cs
- isolationinterop.cs
- CommandField.cs
- XslNumber.cs
- DropDownButton.cs
- configsystem.cs
- DataSourceControlBuilder.cs
- TreeNode.cs
- WaitingCursor.cs
- FileSecurity.cs
- MailWriter.cs
- ValueQuery.cs
- AssertSection.cs