Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / 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
- VarInfo.cs
- XmlBinaryReader.cs
- XmlSchemaComplexContentExtension.cs
- WebPartManager.cs
- IdentityHolder.cs
- DropShadowEffect.cs
- SessionStateModule.cs
- MetadataArtifactLoaderCompositeResource.cs
- XslCompiledTransform.cs
- Int16Storage.cs
- StylusPointProperty.cs
- GridViewDeletedEventArgs.cs
- DocumentGrid.cs
- Console.cs
- DynamicPropertyHolder.cs
- FunctionNode.cs
- StreamAsIStream.cs
- DocumentApplicationJournalEntry.cs
- DataSourceControlBuilder.cs
- Zone.cs
- CodeTypeOfExpression.cs
- DesignerAttribute.cs
- FrameDimension.cs
- EntityCommandDefinition.cs
- HttpGetProtocolImporter.cs
- Constant.cs
- AssemblyCollection.cs
- FlowLayoutSettings.cs
- StringStorage.cs
- TransformProviderWrapper.cs
- TableColumn.cs
- WmlLabelAdapter.cs
- SqlInternalConnection.cs
- OpenFileDialog.cs
- _ContextAwareResult.cs
- Emitter.cs
- WorkflowQueueInfo.cs
- InputMethodStateTypeInfo.cs
- HttpConfigurationContext.cs
- HttpPostedFileBase.cs
- MappingException.cs
- TextPenaltyModule.cs
- EditorServiceContext.cs
- KeyValueConfigurationCollection.cs
- AssemblyContextControlItem.cs
- Menu.cs
- SafeLibraryHandle.cs
- DropShadowEffect.cs
- DataGridItemCollection.cs
- DynamicFilterExpression.cs
- PseudoWebRequest.cs
- ObjectDataSourceSelectingEventArgs.cs
- XmlQueryContext.cs
- CompositeCollectionView.cs
- QueryOperationResponseOfT.cs
- CrossContextChannel.cs
- NamedPipeActivation.cs
- Substitution.cs
- SequenceNumber.cs
- SettingsContext.cs
- ExecutedRoutedEventArgs.cs
- DefaultShape.cs
- OleAutBinder.cs
- XPathNodeIterator.cs
- OdbcCommandBuilder.cs
- SoapMessage.cs
- EventLog.cs
- ProtocolViolationException.cs
- SerialPort.cs
- ipaddressinformationcollection.cs
- PermissionRequestEvidence.cs
- DispatcherObject.cs
- ImportedNamespaceContextItem.cs
- BuildManagerHost.cs
- BooleanConverter.cs
- ToolStripContainerDesigner.cs
- TableCell.cs
- HighContrastHelper.cs
- Convert.cs
- IOException.cs
- OAVariantLib.cs
- ObjectAnimationUsingKeyFrames.cs
- InkPresenterAutomationPeer.cs
- OleDbMetaDataFactory.cs
- ResourceContainer.cs
- ConsumerConnectionPointCollection.cs
- DataGridViewLinkColumn.cs
- SystemThemeKey.cs
- ItemCollectionEditor.cs
- ParallelTimeline.cs
- XmlEventCache.cs
- QualificationDataItem.cs
- TableCellAutomationPeer.cs
- Light.cs
- SoundPlayer.cs
- XmlDataSourceNodeDescriptor.cs
- GeneralTransform.cs
- ContentValidator.cs
- QuaternionKeyFrameCollection.cs
- WebBrowserUriTypeConverter.cs