Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Framework / System / Windows / Trigger.cs / 1 / Trigger.cs
using MS.Utility; using System.IO; using System.Collections.Specialized; using System.ComponentModel; using System.Windows.Markup; using System; using System.Diagnostics; namespace System.Windows { ////// A single Style property conditional dependency driver /// [ContentProperty("Setters")] public class Trigger : TriggerBase, IAddChild { ////// DependencyProperty of the conditional /// [Ambient] [Localizability(LocalizationCategory.None, Modifiability = Modifiability.Unmodifiable, Readability = Readability.Unreadable)] // Not localizable by-default public DependencyProperty Property { get { // Verify Context Access VerifyAccess(); return _property; } set { // Verify Context Access VerifyAccess(); if (IsSealed) { throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "Trigger")); } _property = value; } } ////// Value of the condition (equality check) /// [DependsOn("Property")] [DependsOn("SourceName")] [Localizability(LocalizationCategory.None, Readability = Readability.Unreadable)] // Not localizable by-default public object Value { get { // Verify Context Access VerifyAccess(); return _value; } set { // Verify Context Access VerifyAccess(); if (IsSealed) { throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "Trigger")); } if (value is MarkupExtension) { throw new ArgumentException(SR.Get(SRID.ConditionValueOfMarkupExtensionNotSupported, value.GetType().Name)); } if( value is Expression ) { throw new ArgumentException(SR.Get(SRID.ConditionValueOfExpressionNotSupported)); } _value = value; } } ////// The x:Name of the object whose property shall /// trigger the associated setters to be applied. /// If null, then this is the object being Styled /// and not anything under its Template Tree. /// [DefaultValue(null)] public string SourceName { get { // Verify Context Access VerifyAccess(); return _sourceName; } set { // Verify Context Access VerifyAccess(); if( IsSealed ) { throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "Trigger")); } _sourceName = value; } } ////// Collection of Setter objects, which describes what to apply /// when this trigger is active. /// [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public SetterBaseCollection Setters { get { // Verify Context Access VerifyAccess(); if( _setters == null ) { _setters = new SetterBaseCollection(); } return _setters; } } ////// This method is called to Add a Setter object as a child of the Style. /// /// /// The object to add as a child; it must be a Setter or subclass. /// void IAddChild.AddChild (Object value) { // Verify Context Access VerifyAccess(); Setters.Add(Trigger.CheckChildIsSetter(value)); } ////// This method is called by the parser when text appears under the tag in markup. /// As default Styles do not support text, calling this method has no effect. /// /// /// Text to add as a child. /// void IAddChild.AddText (string text) { // Verify Context Access VerifyAccess(); XamlSerializerUtil.ThrowIfNonWhiteSpaceInAddText(text, this); } // Shared by PropertyTrigger, MultiPropertyTrigger, DataTrigger, MultiDataTrigger internal static Setter CheckChildIsSetter( object o ) { if (o == null) { throw new ArgumentNullException("o"); } Setter setter = o as Setter; if (setter == null) { throw new ArgumentException(SR.Get(SRID.UnexpectedParameterType, o.GetType(), typeof(Setter)), "o"); } return setter; } internal sealed override void Seal() { if (IsSealed) { return; } if (_property != null) { // Ensure valid condition if (!_property.IsValidValue(_value)) { throw new InvalidOperationException(SR.Get(SRID.InvalidPropertyValue, _value, _property.Name )); } } // Freeze the condition for the trigger StyleHelper.SealIfSealable(_value); // Process the _setters collection: Copy values into PropertyValueList and seal the Setter objects. ProcessSettersCollection(_setters); // Build conditions array from collection TriggerConditions = new TriggerCondition[] { new TriggerCondition( _property, LogicalOp.Equals, _value, (_sourceName != null) ? _sourceName : StyleHelper.SelfName) }; // Set Condition for all property triggers for (int i = 0; i < PropertyValues.Count; i++) { PropertyValue propertyValue = PropertyValues[i]; propertyValue.Conditions = TriggerConditions; // Put back modified struct PropertyValues[i] = propertyValue; } base.Seal(); } // evaluate the current state of the trigger internal override bool GetCurrentState(DependencyObject container, UncommonFielddataField) { Debug.Assert( TriggerConditions != null && TriggerConditions.Length == 1, "This method assumes there is exactly one TriggerCondition." ); Debug.Assert( TriggerConditions[0].SourceChildIndex == 0, "This method was created to handle properties on the containing object, more work is needed to handle templated children too." ); return TriggerConditions[0].Match(container.GetValue(TriggerConditions[0].Property)); } private DependencyProperty _property; private object _value = DependencyProperty.UnsetValue; private string _sourceName = null; private SetterBaseCollection _setters = null; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. using MS.Utility; using System.IO; using System.Collections.Specialized; using System.ComponentModel; using System.Windows.Markup; using System; using System.Diagnostics; namespace System.Windows { /// /// A single Style property conditional dependency driver /// [ContentProperty("Setters")] public class Trigger : TriggerBase, IAddChild { ////// DependencyProperty of the conditional /// [Ambient] [Localizability(LocalizationCategory.None, Modifiability = Modifiability.Unmodifiable, Readability = Readability.Unreadable)] // Not localizable by-default public DependencyProperty Property { get { // Verify Context Access VerifyAccess(); return _property; } set { // Verify Context Access VerifyAccess(); if (IsSealed) { throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "Trigger")); } _property = value; } } ////// Value of the condition (equality check) /// [DependsOn("Property")] [DependsOn("SourceName")] [Localizability(LocalizationCategory.None, Readability = Readability.Unreadable)] // Not localizable by-default public object Value { get { // Verify Context Access VerifyAccess(); return _value; } set { // Verify Context Access VerifyAccess(); if (IsSealed) { throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "Trigger")); } if (value is MarkupExtension) { throw new ArgumentException(SR.Get(SRID.ConditionValueOfMarkupExtensionNotSupported, value.GetType().Name)); } if( value is Expression ) { throw new ArgumentException(SR.Get(SRID.ConditionValueOfExpressionNotSupported)); } _value = value; } } ////// The x:Name of the object whose property shall /// trigger the associated setters to be applied. /// If null, then this is the object being Styled /// and not anything under its Template Tree. /// [DefaultValue(null)] public string SourceName { get { // Verify Context Access VerifyAccess(); return _sourceName; } set { // Verify Context Access VerifyAccess(); if( IsSealed ) { throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "Trigger")); } _sourceName = value; } } ////// Collection of Setter objects, which describes what to apply /// when this trigger is active. /// [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public SetterBaseCollection Setters { get { // Verify Context Access VerifyAccess(); if( _setters == null ) { _setters = new SetterBaseCollection(); } return _setters; } } ////// This method is called to Add a Setter object as a child of the Style. /// /// /// The object to add as a child; it must be a Setter or subclass. /// void IAddChild.AddChild (Object value) { // Verify Context Access VerifyAccess(); Setters.Add(Trigger.CheckChildIsSetter(value)); } ////// This method is called by the parser when text appears under the tag in markup. /// As default Styles do not support text, calling this method has no effect. /// /// /// Text to add as a child. /// void IAddChild.AddText (string text) { // Verify Context Access VerifyAccess(); XamlSerializerUtil.ThrowIfNonWhiteSpaceInAddText(text, this); } // Shared by PropertyTrigger, MultiPropertyTrigger, DataTrigger, MultiDataTrigger internal static Setter CheckChildIsSetter( object o ) { if (o == null) { throw new ArgumentNullException("o"); } Setter setter = o as Setter; if (setter == null) { throw new ArgumentException(SR.Get(SRID.UnexpectedParameterType, o.GetType(), typeof(Setter)), "o"); } return setter; } internal sealed override void Seal() { if (IsSealed) { return; } if (_property != null) { // Ensure valid condition if (!_property.IsValidValue(_value)) { throw new InvalidOperationException(SR.Get(SRID.InvalidPropertyValue, _value, _property.Name )); } } // Freeze the condition for the trigger StyleHelper.SealIfSealable(_value); // Process the _setters collection: Copy values into PropertyValueList and seal the Setter objects. ProcessSettersCollection(_setters); // Build conditions array from collection TriggerConditions = new TriggerCondition[] { new TriggerCondition( _property, LogicalOp.Equals, _value, (_sourceName != null) ? _sourceName : StyleHelper.SelfName) }; // Set Condition for all property triggers for (int i = 0; i < PropertyValues.Count; i++) { PropertyValue propertyValue = PropertyValues[i]; propertyValue.Conditions = TriggerConditions; // Put back modified struct PropertyValues[i] = propertyValue; } base.Seal(); } // evaluate the current state of the trigger internal override bool GetCurrentState(DependencyObject container, UncommonFielddataField) { Debug.Assert( TriggerConditions != null && TriggerConditions.Length == 1, "This method assumes there is exactly one TriggerCondition." ); Debug.Assert( TriggerConditions[0].SourceChildIndex == 0, "This method was created to handle properties on the containing object, more work is needed to handle templated children too." ); return TriggerConditions[0].Match(container.GetValue(TriggerConditions[0].Property)); } private DependencyProperty _property; private object _value = DependencyProperty.UnsetValue; private string _sourceName = null; private SetterBaseCollection _setters = null; } } // 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
- PageTextBox.cs
- ProvidersHelper.cs
- DataGridViewEditingControlShowingEventArgs.cs
- DrawingGroup.cs
- PauseStoryboard.cs
- login.cs
- SQLByte.cs
- PerformanceCounterPermissionEntryCollection.cs
- Misc.cs
- CodeTypeDeclaration.cs
- StylusPointPropertyUnit.cs
- UniqueIdentifierService.cs
- FontFamily.cs
- Emitter.cs
- ConfigurationElementProperty.cs
- CompositeFontParser.cs
- FastPropertyAccessor.cs
- EventLogSession.cs
- WebServiceParameterData.cs
- ProfileService.cs
- PreviewPrintController.cs
- SocketInformation.cs
- WindowsAltTab.cs
- XmlSchemaAnnotated.cs
- ApplicationFileCodeDomTreeGenerator.cs
- ConsoleKeyInfo.cs
- ResourceReferenceExpressionConverter.cs
- TimeoutException.cs
- ContainerSelectorBehavior.cs
- FlowLayoutPanel.cs
- ResXDataNode.cs
- IPHostEntry.cs
- CDSCollectionETWBCLProvider.cs
- TreeNodeClickEventArgs.cs
- StrongNameIdentityPermission.cs
- TrustSection.cs
- DataListComponentEditor.cs
- ToolStripCodeDomSerializer.cs
- Light.cs
- PropertyToken.cs
- CalendarDateChangedEventArgs.cs
- WsdlImporter.cs
- WindowsImpersonationContext.cs
- SqlException.cs
- DataViewListener.cs
- AutoGeneratedField.cs
- SettingsAttributes.cs
- RequestValidator.cs
- StorageRoot.cs
- WebServiceErrorEvent.cs
- Registry.cs
- AutoSizeComboBox.cs
- WebResourceAttribute.cs
- EndpointConfigContainer.cs
- StrokeNodeOperations2.cs
- BinaryReader.cs
- PointCollectionConverter.cs
- SqlUserDefinedTypeAttribute.cs
- Ref.cs
- ColumnMap.cs
- ResourceProviderFactory.cs
- Comparer.cs
- Quaternion.cs
- GenericXmlSecurityTokenAuthenticator.cs
- ListViewTableRow.cs
- ProfileProvider.cs
- Merger.cs
- ExpandSegmentCollection.cs
- HtmlControlPersistable.cs
- XmlSchemaSubstitutionGroup.cs
- ConnectionProviderAttribute.cs
- XmlWriterTraceListener.cs
- DrawItemEvent.cs
- ObjectComplexPropertyMapping.cs
- ReliableReplySessionChannel.cs
- TextServicesDisplayAttribute.cs
- XmlLanguageConverter.cs
- _NegotiateClient.cs
- CollectionChangeEventArgs.cs
- DynamicPhysicalDiscoSearcher.cs
- WhiteSpaceTrimStringConverter.cs
- WorkflowDesignerColors.cs
- ObjectHelper.cs
- ContainerFilterService.cs
- SingleAnimation.cs
- ListViewEditEventArgs.cs
- XamlSerializationHelper.cs
- SequenceFullException.cs
- Triplet.cs
- DataGridViewComboBoxEditingControl.cs
- SubstitutionDesigner.cs
- SecurityPolicySection.cs
- XmlQueryTypeFactory.cs
- CommandEventArgs.cs
- ThreadPoolTaskScheduler.cs
- SoapAttributeOverrides.cs
- ApplicationException.cs
- CustomCategoryAttribute.cs
- BuildManager.cs
- CustomUserNameSecurityTokenAuthenticator.cs