Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / System / Windows / DataTrigger.cs / 1 / DataTrigger.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: Defines DataTrigger object, akin to Trigger except it // gets values from data. // //--------------------------------------------------------------------------- using System; using System.Collections.Specialized; using System.ComponentModel; using System.Diagnostics; using System.Windows.Data; using System.Windows.Markup; namespace System.Windows { ////// A single Style data conditional dependency driver /// [ContentProperty("Setters")] public class DataTrigger : TriggerBase, IAddChild { ////// Binding declaration of the conditional /// [Localizability(LocalizationCategory.None, Readability = Readability.Unreadable)] // Not localizable by-default public BindingBase Binding { get { // Verify Context Access VerifyAccess(); return _binding; } set { // Verify Context Access VerifyAccess(); if (IsSealed) { throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "DataTrigger")); } _binding = value; } } ////// Value of the condition (equality check) /// [DependsOn("Binding")] [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, "DataTrigger")); } 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; } } ////// 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); } internal sealed override void Seal() { if (IsSealed) { return; } // Process the _setters collection: Copy values into PropertyValueList and seal the Setter objects. ProcessSettersCollection(_setters); // Freeze the value for the trigger StyleHelper.SealIfSealable(_value); // Build conditions array from collection TriggerConditions = new TriggerCondition[] { new TriggerCondition( _binding, LogicalOp.Equals, _value) }; // Set Condition for all data triggers for (int i = 0; i < PropertyValues.Count; i++) { PropertyValue propertyValue = PropertyValues[i]; propertyValue.Conditions = TriggerConditions; switch (propertyValue.ValueType) { case PropertyValueType.Trigger: propertyValue.ValueType = PropertyValueType.DataTrigger; break; case PropertyValueType.PropertyTriggerResource: propertyValue.ValueType = PropertyValueType.DataTriggerResource; break; default: throw new InvalidOperationException(SR.Get(SRID.UnexpectedValueTypeForDataTrigger, propertyValue.ValueType)); } // 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." ); return TriggerConditions[0].ConvertAndMatch(StyleHelper.GetDataTriggerValue(dataField, container, TriggerConditions[0].Binding)); } private BindingBase _binding; private object _value = DependencyProperty.UnsetValue; private SetterBaseCollection _setters = null; } } // 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. // // // Description: Defines DataTrigger object, akin to Trigger except it // gets values from data. // //--------------------------------------------------------------------------- using System; using System.Collections.Specialized; using System.ComponentModel; using System.Diagnostics; using System.Windows.Data; using System.Windows.Markup; namespace System.Windows { ////// A single Style data conditional dependency driver /// [ContentProperty("Setters")] public class DataTrigger : TriggerBase, IAddChild { ////// Binding declaration of the conditional /// [Localizability(LocalizationCategory.None, Readability = Readability.Unreadable)] // Not localizable by-default public BindingBase Binding { get { // Verify Context Access VerifyAccess(); return _binding; } set { // Verify Context Access VerifyAccess(); if (IsSealed) { throw new InvalidOperationException(SR.Get(SRID.CannotChangeAfterSealed, "DataTrigger")); } _binding = value; } } ////// Value of the condition (equality check) /// [DependsOn("Binding")] [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, "DataTrigger")); } 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; } } ////// 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); } internal sealed override void Seal() { if (IsSealed) { return; } // Process the _setters collection: Copy values into PropertyValueList and seal the Setter objects. ProcessSettersCollection(_setters); // Freeze the value for the trigger StyleHelper.SealIfSealable(_value); // Build conditions array from collection TriggerConditions = new TriggerCondition[] { new TriggerCondition( _binding, LogicalOp.Equals, _value) }; // Set Condition for all data triggers for (int i = 0; i < PropertyValues.Count; i++) { PropertyValue propertyValue = PropertyValues[i]; propertyValue.Conditions = TriggerConditions; switch (propertyValue.ValueType) { case PropertyValueType.Trigger: propertyValue.ValueType = PropertyValueType.DataTrigger; break; case PropertyValueType.PropertyTriggerResource: propertyValue.ValueType = PropertyValueType.DataTriggerResource; break; default: throw new InvalidOperationException(SR.Get(SRID.UnexpectedValueTypeForDataTrigger, propertyValue.ValueType)); } // 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." ); return TriggerConditions[0].ConvertAndMatch(StyleHelper.GetDataTriggerValue(dataField, container, TriggerConditions[0].Binding)); } private BindingBase _binding; private object _value = DependencyProperty.UnsetValue; 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
- SQLDoubleStorage.cs
- ComponentGuaranteesAttribute.cs
- FixedPosition.cs
- PerfService.cs
- FigureHelper.cs
- AttachedPropertyDescriptor.cs
- AsymmetricKeyExchangeDeformatter.cs
- DesignSurfaceEvent.cs
- listitem.cs
- ToolStripContextMenu.cs
- ToolStripCollectionEditor.cs
- TraceListener.cs
- UTF7Encoding.cs
- PackUriHelper.cs
- Screen.cs
- DecimalAnimation.cs
- Exception.cs
- ControlPager.cs
- MemoryResponseElement.cs
- Privilege.cs
- NewArrayExpression.cs
- TableLayoutColumnStyleCollection.cs
- CodeIterationStatement.cs
- DataViewManager.cs
- BamlResourceContent.cs
- Pkcs9Attribute.cs
- LineSegment.cs
- DataControlFieldHeaderCell.cs
- IisTraceListener.cs
- WizardDesigner.cs
- PtsHost.cs
- Tuple.cs
- ListViewItemMouseHoverEvent.cs
- InkCanvasFeedbackAdorner.cs
- SiteMapNodeItem.cs
- DetailsViewActionList.cs
- ResourceAttributes.cs
- PackagingUtilities.cs
- AccessibleObject.cs
- CompositeDataBoundControl.cs
- PriorityQueue.cs
- RegexMatchCollection.cs
- FirstMatchCodeGroup.cs
- AudienceUriMode.cs
- LinearKeyFrames.cs
- MessageSmuggler.cs
- ToolStripSplitButton.cs
- AssemblyAssociatedContentFileAttribute.cs
- SqlUnionizer.cs
- SiteMapHierarchicalDataSourceView.cs
- GradientBrush.cs
- safex509handles.cs
- SelectionUIService.cs
- XamlVector3DCollectionSerializer.cs
- RemoteCryptoTokenProvider.cs
- TitleStyle.cs
- ToolTipAutomationPeer.cs
- CustomValidator.cs
- Codec.cs
- XmlEventCache.cs
- Trigger.cs
- ResourceType.cs
- _UriTypeConverter.cs
- ValidationSettings.cs
- Contracts.cs
- Operators.cs
- Component.cs
- MetadataPropertyvalue.cs
- FormatSettings.cs
- InternalDispatchObject.cs
- _KerberosClient.cs
- SemanticBasicElement.cs
- Triangle.cs
- StructuredType.cs
- Thumb.cs
- TCPListener.cs
- ObjectConverter.cs
- RenderDataDrawingContext.cs
- DBCommandBuilder.cs
- ELinqQueryState.cs
- Exception.cs
- DrawingVisualDrawingContext.cs
- TripleDES.cs
- TemplateControlParser.cs
- AppSettingsExpressionBuilder.cs
- ItemCollection.cs
- SoapSchemaImporter.cs
- HttpWebRequest.cs
- Int32CollectionConverter.cs
- SqlGenericUtil.cs
- SafeNativeMethodsCLR.cs
- StrokeSerializer.cs
- ContentHostHelper.cs
- CodeMemberMethod.cs
- DynamicEntity.cs
- DecoderFallbackWithFailureFlag.cs
- JsonObjectDataContract.cs
- PathFigure.cs
- DesignTimeResourceProviderFactoryAttribute.cs
- Rotation3DAnimationBase.cs