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 / Media / GeometryHitTestParameters.cs / 1 / GeometryHitTestParameters.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2003 // // File: GeometryHitTestParameters //----------------------------------------------------------------------------- using System; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Threading; using System.Security; using System.Security.Permissions; using System.Collections; using System.Diagnostics; using MS.Internal; namespace System.Windows.Media { ////// This is the class for specifying parameters hit testing with a geometry. /// public class GeometryHitTestParameters : HitTestParameters { private PathGeometry _hitGeometryInternal; // The internal geometry we use for hit testing private Geometry _hitGeometryCache = null; // Cached frozen copy we hand out from HitGeometry property. private Rect _origBounds; private Rect _bounds; private MatrixStack _matrixStack; ////// The constructor takes the geometry to hit test with. /// public GeometryHitTestParameters(Geometry geometry) : base() { // This ctor guarantees that we are initialized in the following way: // // 1. The geometry provided by the user is unmodified // 2. _hitGeometryInternal is a PathGeometry equivilent to the supplied geometry // 3. _hitGeometryInternal.Tranform is a MatrixTransform equivilent to the supplied // geometry.Transform // 4. _origBounds is the untransformed bounds of the _hitGeometryInternal (inner space). // 5. _bounds is the transformed bounds of the _hitGeometryInternal (outer space). // 6. _matrixStack is an empty stack. if (geometry == null) { throw new ArgumentNullException("geometry"); } // Convert the Geometry to an equivilent PathGeometry up front to prevent // conversion on every call to DoesContainWithDetail. If the geometry is // animate this also has the side effect of eliminating animation interplay. _hitGeometryInternal = geometry.GetAsPathGeometry(); // If GetAsPathGeometry was a no-op, force the copy because we do not // went to modify the user's Geometry. if (object.ReferenceEquals(_hitGeometryInternal, geometry)) { _hitGeometryInternal = _hitGeometryInternal.Clone(); } // Convert _hitGeometryInternal.Transform to an equivilent MatrixTransform // so that we can aggregate in PushMatrix/PopMatrix without building a // TransformCollection. Transform origTransform = _hitGeometryInternal.Transform; MatrixTransform newTransform = new MatrixTransform(); _hitGeometryInternal.Transform = newTransform; // Before we initialize MatrixTransform.Matrix, cache the bounds of this // geometry without any transforms. _origBounds = _hitGeometryInternal.Bounds; // If we had a non-Identity transform, update our MatrixTransform.Matrix // with its Value. (Note that when GetAsPathGeometry *isn't* a no-op // it applies the transform to the figures and returns with a Geometry // with an identity Transform.) if (origTransform != null && !origTransform.IsIdentity) { newTransform.Matrix = origTransform.Value; } // Initialize the current transformed bounds of this Geometry _bounds = _hitGeometryInternal.Bounds; _matrixStack = new MatrixStack(); } ////// The geometry to hit test against. This will be a frozen copy of the /// hit geometry transformed into the local space of the Visual being hit /// tested. /// public Geometry HitGeometry { get { if (_hitGeometryCache == null) { _hitGeometryCache = (Geometry) _hitGeometryInternal.GetAsFrozen(); } Debug.Assert(_hitGeometryInternal.Transform.Value == _hitGeometryCache.Transform.Value, "HitGeometry has a different transform than HitGeometryInternal. Did we forget to invalidate the cache?"); return _hitGeometryCache; } } // Use this property when retrieving the hit geometry internally. Right now it avoids a // a cast. In the future it will avoid a copy as well (see bug 1133159). The value from // this property should never be exposed to the user (e.g., do not use it to return // hit test results.) internal PathGeometry InternalHitGeometry { get { return _hitGeometryInternal; } } internal Rect Bounds { get { return _bounds; } } internal void PushMatrix(ref Matrix newMatrix) { MatrixTransform matrixTransform = (MatrixTransform) _hitGeometryInternal.Transform; // Grab the old composedMatrix from our MatrixTransform and save // it on our MatrixStack. Matrix composedMatrix = matrixTransform.Value; _matrixStack.Push(ref composedMatrix, false); // Compose the new matrix into our MatrixTransform MatrixUtil.MultiplyMatrix(ref composedMatrix, ref newMatrix); matrixTransform.Matrix = composedMatrix; // Update active bounds based on new tranform. _bounds = Rect.Transform(_origBounds, composedMatrix); ClearHitGeometryCache(); } internal void PopMatrix() { Matrix matrix = _matrixStack.Peek(); // Restore saved transform. ((MatrixTransform) (_hitGeometryInternal.Transform)).Matrix = matrix; // Update active bounds based on new X-form. _bounds = Rect.Transform(_origBounds, matrix); _matrixStack.Pop(); ClearHitGeometryCache(); } // This method is called to restore the _hitGeometryInternal's transform to its original state // in the event that a user's delegate threw an exception during the hit test walk. internal void EmergencyRestoreOriginalTransform() { // Replace the current transform with the first matrix pushed onto the stack. Matrix matrix = ((MatrixTransform) (_hitGeometryInternal.Transform)).Matrix; while (!_matrixStack.IsEmpty) { matrix = _matrixStack.Peek(); _matrixStack.Pop(); } ((MatrixTransform) (_hitGeometryInternal.Transform)).Matrix = matrix; ClearHitGeometryCache(); } // This clears the private void ClearHitGeometryCache() { _hitGeometryCache = null; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2003 // // File: GeometryHitTestParameters //----------------------------------------------------------------------------- using System; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Threading; using System.Security; using System.Security.Permissions; using System.Collections; using System.Diagnostics; using MS.Internal; namespace System.Windows.Media { ////// This is the class for specifying parameters hit testing with a geometry. /// public class GeometryHitTestParameters : HitTestParameters { private PathGeometry _hitGeometryInternal; // The internal geometry we use for hit testing private Geometry _hitGeometryCache = null; // Cached frozen copy we hand out from HitGeometry property. private Rect _origBounds; private Rect _bounds; private MatrixStack _matrixStack; ////// The constructor takes the geometry to hit test with. /// public GeometryHitTestParameters(Geometry geometry) : base() { // This ctor guarantees that we are initialized in the following way: // // 1. The geometry provided by the user is unmodified // 2. _hitGeometryInternal is a PathGeometry equivilent to the supplied geometry // 3. _hitGeometryInternal.Tranform is a MatrixTransform equivilent to the supplied // geometry.Transform // 4. _origBounds is the untransformed bounds of the _hitGeometryInternal (inner space). // 5. _bounds is the transformed bounds of the _hitGeometryInternal (outer space). // 6. _matrixStack is an empty stack. if (geometry == null) { throw new ArgumentNullException("geometry"); } // Convert the Geometry to an equivilent PathGeometry up front to prevent // conversion on every call to DoesContainWithDetail. If the geometry is // animate this also has the side effect of eliminating animation interplay. _hitGeometryInternal = geometry.GetAsPathGeometry(); // If GetAsPathGeometry was a no-op, force the copy because we do not // went to modify the user's Geometry. if (object.ReferenceEquals(_hitGeometryInternal, geometry)) { _hitGeometryInternal = _hitGeometryInternal.Clone(); } // Convert _hitGeometryInternal.Transform to an equivilent MatrixTransform // so that we can aggregate in PushMatrix/PopMatrix without building a // TransformCollection. Transform origTransform = _hitGeometryInternal.Transform; MatrixTransform newTransform = new MatrixTransform(); _hitGeometryInternal.Transform = newTransform; // Before we initialize MatrixTransform.Matrix, cache the bounds of this // geometry without any transforms. _origBounds = _hitGeometryInternal.Bounds; // If we had a non-Identity transform, update our MatrixTransform.Matrix // with its Value. (Note that when GetAsPathGeometry *isn't* a no-op // it applies the transform to the figures and returns with a Geometry // with an identity Transform.) if (origTransform != null && !origTransform.IsIdentity) { newTransform.Matrix = origTransform.Value; } // Initialize the current transformed bounds of this Geometry _bounds = _hitGeometryInternal.Bounds; _matrixStack = new MatrixStack(); } ////// The geometry to hit test against. This will be a frozen copy of the /// hit geometry transformed into the local space of the Visual being hit /// tested. /// public Geometry HitGeometry { get { if (_hitGeometryCache == null) { _hitGeometryCache = (Geometry) _hitGeometryInternal.GetAsFrozen(); } Debug.Assert(_hitGeometryInternal.Transform.Value == _hitGeometryCache.Transform.Value, "HitGeometry has a different transform than HitGeometryInternal. Did we forget to invalidate the cache?"); return _hitGeometryCache; } } // Use this property when retrieving the hit geometry internally. Right now it avoids a // a cast. In the future it will avoid a copy as well (see bug 1133159). The value from // this property should never be exposed to the user (e.g., do not use it to return // hit test results.) internal PathGeometry InternalHitGeometry { get { return _hitGeometryInternal; } } internal Rect Bounds { get { return _bounds; } } internal void PushMatrix(ref Matrix newMatrix) { MatrixTransform matrixTransform = (MatrixTransform) _hitGeometryInternal.Transform; // Grab the old composedMatrix from our MatrixTransform and save // it on our MatrixStack. Matrix composedMatrix = matrixTransform.Value; _matrixStack.Push(ref composedMatrix, false); // Compose the new matrix into our MatrixTransform MatrixUtil.MultiplyMatrix(ref composedMatrix, ref newMatrix); matrixTransform.Matrix = composedMatrix; // Update active bounds based on new tranform. _bounds = Rect.Transform(_origBounds, composedMatrix); ClearHitGeometryCache(); } internal void PopMatrix() { Matrix matrix = _matrixStack.Peek(); // Restore saved transform. ((MatrixTransform) (_hitGeometryInternal.Transform)).Matrix = matrix; // Update active bounds based on new X-form. _bounds = Rect.Transform(_origBounds, matrix); _matrixStack.Pop(); ClearHitGeometryCache(); } // This method is called to restore the _hitGeometryInternal's transform to its original state // in the event that a user's delegate threw an exception during the hit test walk. internal void EmergencyRestoreOriginalTransform() { // Replace the current transform with the first matrix pushed onto the stack. Matrix matrix = ((MatrixTransform) (_hitGeometryInternal.Transform)).Matrix; while (!_matrixStack.IsEmpty) { matrix = _matrixStack.Peek(); _matrixStack.Pop(); } ((MatrixTransform) (_hitGeometryInternal.Transform)).Matrix = matrix; ClearHitGeometryCache(); } // This clears the private void ClearHitGeometryCache() { _hitGeometryCache = 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
- PngBitmapEncoder.cs
- XhtmlMobileTextWriter.cs
- DbProviderFactories.cs
- XmlArrayItemAttribute.cs
- SecurityHeaderElementInferenceEngine.cs
- InstancePersistence.cs
- RuntimeConfigLKG.cs
- PropertyOverridesTypeEditor.cs
- WCFBuildProvider.cs
- Int64KeyFrameCollection.cs
- AccessedThroughPropertyAttribute.cs
- _ShellExpression.cs
- CompiledQueryCacheKey.cs
- BindingValueChangedEventArgs.cs
- SelectionEditor.cs
- WindowsGrip.cs
- WebPartDisplayModeCancelEventArgs.cs
- XmlImplementation.cs
- MimeImporter.cs
- ParameterModifier.cs
- PackagePart.cs
- NetSectionGroup.cs
- XmlnsDefinitionAttribute.cs
- TripleDESCryptoServiceProvider.cs
- DataServiceProcessingPipelineEventArgs.cs
- NetworkInterface.cs
- CompilerResults.cs
- BoolLiteral.cs
- LinearQuaternionKeyFrame.cs
- TextChange.cs
- RecordBuilder.cs
- RadioButtonStandardAdapter.cs
- RangeExpression.cs
- BufferedGraphicsManager.cs
- InvalidOleVariantTypeException.cs
- EntryWrittenEventArgs.cs
- XamlClipboardData.cs
- InstanceLockLostException.cs
- KeyConverter.cs
- MachineKeyConverter.cs
- WebBrowserNavigatedEventHandler.cs
- WebPartConnectionsConnectVerb.cs
- ResumeStoryboard.cs
- XsdDataContractExporter.cs
- HttpServerUtilityWrapper.cs
- TouchEventArgs.cs
- NativeObjectSecurity.cs
- ByteStack.cs
- DecimalSumAggregationOperator.cs
- GradientStop.cs
- ExternalDataExchangeService.cs
- NetCodeGroup.cs
- XmlStringTable.cs
- SqlServer2KCompatibilityCheck.cs
- safePerfProviderHandle.cs
- TextTreeTextBlock.cs
- ContextProperty.cs
- ListViewDeleteEventArgs.cs
- Array.cs
- SelectionEditingBehavior.cs
- ScriptRegistrationManager.cs
- StyleReferenceConverter.cs
- FileInfo.cs
- ParserStreamGeometryContext.cs
- HtmlTextArea.cs
- SignatureToken.cs
- ProfileParameter.cs
- Connector.cs
- DataSourceXmlSerializer.cs
- ScrollContentPresenter.cs
- TransportManager.cs
- UrlPropertyAttribute.cs
- RemotingConfiguration.cs
- XmlCharCheckingReader.cs
- SystemThemeKey.cs
- SoapFormatter.cs
- InstanceOwner.cs
- DocumentPageViewAutomationPeer.cs
- PassportIdentity.cs
- ConnectionConsumerAttribute.cs
- ListSurrogate.cs
- TableDetailsRow.cs
- TextTreeInsertElementUndoUnit.cs
- DataTablePropertyDescriptor.cs
- XPathAncestorQuery.cs
- TextOptions.cs
- OracleRowUpdatedEventArgs.cs
- LicenseContext.cs
- InputScopeManager.cs
- __TransparentProxy.cs
- Brush.cs
- StrokeNodeEnumerator.cs
- Error.cs
- EncryptedReference.cs
- TreeBuilder.cs
- XmlFormatMapping.cs
- WCFBuildProvider.cs
- DelegateSerializationHolder.cs
- ListViewUpdatedEventArgs.cs
- Empty.cs