Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / System / Windows / Media / Animation / AnimationClockResource.cs / 1 / AnimationClockResource.cs
//---------------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // File: AnimationClockResource.cs // // Description: This file contains the implementation of AnimationClockResource. // An AnimationClockResource is used to tie together an AnimationClock // and a base value as a DUCE resource. This base class provides // Changed Events. // // History: // 04/29/2004 : adsmith - Created it. // //--------------------------------------------------------------------------- using System; using System.Windows; using System.Windows.Media; using System.Windows.Media.Composition; using System.Diagnostics; using System.Runtime.InteropServices; namespace System.Windows.Media.Animation { ////// AnimationClockResource class. /// AnimationClockResource classes refer to an AnimationClock and a base /// value. They implement DUCE.IResource, and thus can be used to produce /// a render-side resource which represents the current value of this /// AnimationClock. /// They subscribe to the Changed event on the AnimationClock and ensure /// that the resource's current value is up to date. /// internal abstract class AnimationClockResource: DUCE.IResource { ////// Protected constructor for AnimationClockResource. /// The derived class must provide a created duceResource. /// /// The AnimationClock for this resource. Can be null. protected AnimationClockResource(AnimationClock animationClock) { _animationClock = animationClock; if (_animationClock != null) { _animationClock.CurrentTimeInvalidated += new EventHandler(OnChanged); } } #region Public Properties ////// AnimationClock - accessor for the AnimationClock. /// public AnimationClock AnimationClock { get { return _animationClock; } } #endregion Public Properties ////// OnChanged - this is fired if any dependents change. /// In this case, that means the Clock, which means we can (and do) assert that the Clock isn't null. /// /// object - the origin of the change. /// EventArgs - ignored. protected void OnChanged(object sender, EventArgs args) { Debug.Assert(sender as System.Windows.Threading.DispatcherObject != null); Debug.Assert(((System.Windows.Threading.DispatcherObject)sender).Dispatcher != null); Debug.Assert(_animationClock != null); System.Windows.Threading.Dispatcher dispatcher = ((System.Windows.Threading.DispatcherObject)sender).Dispatcher; MediaContext mediaContext = MediaContext.From(dispatcher); DUCE.Channel channel = mediaContext.Channel; // Only register for an update if this resource is currently on channel and // isn't already registered. if (!IsResourceInvalid && _duceResource.IsOnAnyChannel) { // Add this handler to this event means that the handler will be // called on the next UIThread render for this Dispatcher. mediaContext.ResourcesUpdated += new MediaContext.ResourcesUpdatedHandler(UpdateResourceFromMediaContext); IsResourceInvalid = true; } } ////// Propagagtes handler to the _animationClock. /// /// /// EventHandler - the EventHandle to associate with the mutable dependents. /// /// bool - if true, we're adding the new handler, if false we're removing it. internal virtual void PropagateChangedHandlersCore(EventHandler handler, bool adding) { // Nothing to do if the clock is null. if (_animationClock != null) { if (adding) { _animationClock.CurrentTimeInvalidated += handler; } else { _animationClock.CurrentTimeInvalidated -= handler; } } } #region DUCE ////// UpdateResourceFromMediaContext - this is called by the MediaContext /// to validate the render-thread resource. /// Sender is the MediaContext. /// private void UpdateResourceFromMediaContext(DUCE.Channel channel, bool skipOnChannelCheck) { // If we're told we can skip the channel check, then we must be on channel Debug.Assert(!skipOnChannelCheck || _duceResource.IsOnChannel(channel)); // Check to see if we're on the channel and if we're invalid. // Only perform the update if this resource is currently on channel. if (IsResourceInvalid && (skipOnChannelCheck || _duceResource.IsOnChannel(channel))) { UpdateResource(_duceResource.GetHandle(channel), channel); // This resource is now valid. IsResourceInvalid = false; } } ////// UpdateResource - This method is called to update the render-thread /// resource on a given channel. /// /// The DUCE.ResourceHandle for this resource on this channel. /// The channel on which to update the render-thread resource. protected abstract void UpdateResource(DUCE.ResourceHandle handle, DUCE.Channel channel); DUCE.ResourceHandle DUCE.IResource.AddRefOnChannel(DUCE.Channel channel) { using (CompositionEngineLock.Acquire()) { if (_duceResource.CreateOrAddRefOnChannel(channel, ResourceType)) { UpdateResource(_duceResource.GetHandle(channel), channel); } return _duceResource.GetHandle(channel); } } void DUCE.IResource.ReleaseOnChannel(DUCE.Channel channel) { using (CompositionEngineLock.Acquire()) { Debug.Assert(_duceResource.IsOnChannel(channel)); _duceResource.ReleaseOnChannel(channel); } } DUCE.ResourceHandle DUCE.IResource.GetHandle(DUCE.Channel channel) { DUCE.ResourceHandle handle; // Reconsider the need for this lock when removing the MultiChannelResource. using (CompositionEngineLock.Acquire()) { // This method is a short cut and must only be called while the ref count // of this resource on this channel is non-zero. Thus we assert that this // resource is already on this channel. Debug.Assert(_duceResource.IsOnChannel(channel)); handle = _duceResource.GetHandle(channel); } return handle; } int DUCE.IResource.GetChannelCount() { return _duceResource.GetChannelCount(); } DUCE.Channel DUCE.IResource.GetChannel(int index) { return _duceResource.GetChannel(index); } ////// This is only implemented by Visual and Visual3D. /// void DUCE.IResource.RemoveChildFromParent(DUCE.IResource parent, DUCE.Channel channel) { throw new NotImplementedException(); } ////// This is only implemented by Visual and Visual3D. /// DUCE.ResourceHandle DUCE.IResource.Get3DHandle(DUCE.Channel channel) { throw new NotImplementedException(); } #endregion DUCE #region Protected Method protected bool IsResourceInvalid { get { return _isResourceInvalid; } set { _isResourceInvalid = value; } } // // Method which returns the DUCE type of this class. // The base class needs this type when calling CreateOrAddRefOnChannel. // By providing this via a virtual, we avoid a per-instance storage cost. // protected abstract DUCE.ResourceType ResourceType { get; } #endregion Protected Method // DUCE resource // It is provided via the constructor. private DUCE.MultiChannelResource _duceResource = new DUCE.MultiChannelResource(); // This bool keeps track of whether or not this resource is valid // on its channel. private bool _isResourceInvalid; // This AnimationClock is the animation associated with this resource. // It is provided via the constructor. protected AnimationClock _animationClock; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // File: AnimationClockResource.cs // // Description: This file contains the implementation of AnimationClockResource. // An AnimationClockResource is used to tie together an AnimationClock // and a base value as a DUCE resource. This base class provides // Changed Events. // // History: // 04/29/2004 : adsmith - Created it. // //--------------------------------------------------------------------------- using System; using System.Windows; using System.Windows.Media; using System.Windows.Media.Composition; using System.Diagnostics; using System.Runtime.InteropServices; namespace System.Windows.Media.Animation { ////// AnimationClockResource class. /// AnimationClockResource classes refer to an AnimationClock and a base /// value. They implement DUCE.IResource, and thus can be used to produce /// a render-side resource which represents the current value of this /// AnimationClock. /// They subscribe to the Changed event on the AnimationClock and ensure /// that the resource's current value is up to date. /// internal abstract class AnimationClockResource: DUCE.IResource { ////// Protected constructor for AnimationClockResource. /// The derived class must provide a created duceResource. /// /// The AnimationClock for this resource. Can be null. protected AnimationClockResource(AnimationClock animationClock) { _animationClock = animationClock; if (_animationClock != null) { _animationClock.CurrentTimeInvalidated += new EventHandler(OnChanged); } } #region Public Properties ////// AnimationClock - accessor for the AnimationClock. /// public AnimationClock AnimationClock { get { return _animationClock; } } #endregion Public Properties ////// OnChanged - this is fired if any dependents change. /// In this case, that means the Clock, which means we can (and do) assert that the Clock isn't null. /// /// object - the origin of the change. /// EventArgs - ignored. protected void OnChanged(object sender, EventArgs args) { Debug.Assert(sender as System.Windows.Threading.DispatcherObject != null); Debug.Assert(((System.Windows.Threading.DispatcherObject)sender).Dispatcher != null); Debug.Assert(_animationClock != null); System.Windows.Threading.Dispatcher dispatcher = ((System.Windows.Threading.DispatcherObject)sender).Dispatcher; MediaContext mediaContext = MediaContext.From(dispatcher); DUCE.Channel channel = mediaContext.Channel; // Only register for an update if this resource is currently on channel and // isn't already registered. if (!IsResourceInvalid && _duceResource.IsOnAnyChannel) { // Add this handler to this event means that the handler will be // called on the next UIThread render for this Dispatcher. mediaContext.ResourcesUpdated += new MediaContext.ResourcesUpdatedHandler(UpdateResourceFromMediaContext); IsResourceInvalid = true; } } ////// Propagagtes handler to the _animationClock. /// /// /// EventHandler - the EventHandle to associate with the mutable dependents. /// /// bool - if true, we're adding the new handler, if false we're removing it. internal virtual void PropagateChangedHandlersCore(EventHandler handler, bool adding) { // Nothing to do if the clock is null. if (_animationClock != null) { if (adding) { _animationClock.CurrentTimeInvalidated += handler; } else { _animationClock.CurrentTimeInvalidated -= handler; } } } #region DUCE ////// UpdateResourceFromMediaContext - this is called by the MediaContext /// to validate the render-thread resource. /// Sender is the MediaContext. /// private void UpdateResourceFromMediaContext(DUCE.Channel channel, bool skipOnChannelCheck) { // If we're told we can skip the channel check, then we must be on channel Debug.Assert(!skipOnChannelCheck || _duceResource.IsOnChannel(channel)); // Check to see if we're on the channel and if we're invalid. // Only perform the update if this resource is currently on channel. if (IsResourceInvalid && (skipOnChannelCheck || _duceResource.IsOnChannel(channel))) { UpdateResource(_duceResource.GetHandle(channel), channel); // This resource is now valid. IsResourceInvalid = false; } } ////// UpdateResource - This method is called to update the render-thread /// resource on a given channel. /// /// The DUCE.ResourceHandle for this resource on this channel. /// The channel on which to update the render-thread resource. protected abstract void UpdateResource(DUCE.ResourceHandle handle, DUCE.Channel channel); DUCE.ResourceHandle DUCE.IResource.AddRefOnChannel(DUCE.Channel channel) { using (CompositionEngineLock.Acquire()) { if (_duceResource.CreateOrAddRefOnChannel(channel, ResourceType)) { UpdateResource(_duceResource.GetHandle(channel), channel); } return _duceResource.GetHandle(channel); } } void DUCE.IResource.ReleaseOnChannel(DUCE.Channel channel) { using (CompositionEngineLock.Acquire()) { Debug.Assert(_duceResource.IsOnChannel(channel)); _duceResource.ReleaseOnChannel(channel); } } DUCE.ResourceHandle DUCE.IResource.GetHandle(DUCE.Channel channel) { DUCE.ResourceHandle handle; // Reconsider the need for this lock when removing the MultiChannelResource. using (CompositionEngineLock.Acquire()) { // This method is a short cut and must only be called while the ref count // of this resource on this channel is non-zero. Thus we assert that this // resource is already on this channel. Debug.Assert(_duceResource.IsOnChannel(channel)); handle = _duceResource.GetHandle(channel); } return handle; } int DUCE.IResource.GetChannelCount() { return _duceResource.GetChannelCount(); } DUCE.Channel DUCE.IResource.GetChannel(int index) { return _duceResource.GetChannel(index); } ////// This is only implemented by Visual and Visual3D. /// void DUCE.IResource.RemoveChildFromParent(DUCE.IResource parent, DUCE.Channel channel) { throw new NotImplementedException(); } ////// This is only implemented by Visual and Visual3D. /// DUCE.ResourceHandle DUCE.IResource.Get3DHandle(DUCE.Channel channel) { throw new NotImplementedException(); } #endregion DUCE #region Protected Method protected bool IsResourceInvalid { get { return _isResourceInvalid; } set { _isResourceInvalid = value; } } // // Method which returns the DUCE type of this class. // The base class needs this type when calling CreateOrAddRefOnChannel. // By providing this via a virtual, we avoid a per-instance storage cost. // protected abstract DUCE.ResourceType ResourceType { get; } #endregion Protected Method // DUCE resource // It is provided via the constructor. private DUCE.MultiChannelResource _duceResource = new DUCE.MultiChannelResource(); // This bool keeps track of whether or not this resource is valid // on its channel. private bool _isResourceInvalid; // This AnimationClock is the animation associated with this resource. // It is provided via the constructor. protected AnimationClock _animationClock; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- BaseCollection.cs
- RtfToken.cs
- LayoutTableCell.cs
- SafeRightsManagementQueryHandle.cs
- TimeSpanSecondsConverter.cs
- HtmlElementEventArgs.cs
- LongMinMaxAggregationOperator.cs
- TextTreeTextElementNode.cs
- SoapCodeExporter.cs
- CaseInsensitiveHashCodeProvider.cs
- BinaryObjectInfo.cs
- Polygon.cs
- ListenerElementsCollection.cs
- BamlReader.cs
- ProtocolViolationException.cs
- RectConverter.cs
- WSFederationHttpSecurityMode.cs
- FileUtil.cs
- InvokeWebService.cs
- HybridDictionary.cs
- ParameterToken.cs
- OLEDB_Enum.cs
- SchemaElementLookUpTable.cs
- WebPartDeleteVerb.cs
- XmlReader.cs
- FlowDocumentFormatter.cs
- UriSectionReader.cs
- XmlRawWriterWrapper.cs
- ReflectionPermission.cs
- CompositeFontInfo.cs
- TrustManagerMoreInformation.cs
- XmlFormatExtensionPrefixAttribute.cs
- DataSourceIDConverter.cs
- DayRenderEvent.cs
- SerializationHelper.cs
- GridToolTip.cs
- HMACSHA384.cs
- SecurityContext.cs
- ObjectKeyFrameCollection.cs
- QilScopedVisitor.cs
- MonthChangedEventArgs.cs
- _NestedMultipleAsyncResult.cs
- AdjustableArrowCap.cs
- _ProxyChain.cs
- URLString.cs
- _ConnectionGroup.cs
- BookmarkScopeManager.cs
- WorkflowInstance.cs
- LineGeometry.cs
- Paragraph.cs
- DropShadowBitmapEffect.cs
- TabControl.cs
- PathSegmentCollection.cs
- ClockGroup.cs
- _IPv4Address.cs
- DataGrid.cs
- TabPanel.cs
- OutputWindow.cs
- DbException.cs
- WebRequest.cs
- TypeContext.cs
- SizeAnimationClockResource.cs
- XmlLoader.cs
- ObjectFullSpanRewriter.cs
- GPRECTF.cs
- HtmlHead.cs
- EventLogPropertySelector.cs
- OleDbPropertySetGuid.cs
- OrderedDictionary.cs
- UserUseLicenseDictionaryLoader.cs
- DataGridViewCellStateChangedEventArgs.cs
- DataControlImageButton.cs
- Internal.cs
- EmbeddedMailObjectsCollection.cs
- ImageEditor.cs
- SRDisplayNameAttribute.cs
- FlowDocumentReaderAutomationPeer.cs
- DateTimeUtil.cs
- FactoryId.cs
- ComNativeDescriptor.cs
- WindowsListView.cs
- MethodBuilder.cs
- CodeDelegateCreateExpression.cs
- DictionaryCustomTypeDescriptor.cs
- WebBrowsableAttribute.cs
- CollaborationHelperFunctions.cs
- WebPartRestoreVerb.cs
- Font.cs
- XmlSchemaAnyAttribute.cs
- JsonStringDataContract.cs
- TreeNode.cs
- SafeFileMappingHandle.cs
- _ContextAwareResult.cs
- EdmScalarPropertyAttribute.cs
- FontEditor.cs
- SqlServices.cs
- ProtocolViolationException.cs
- SqlNamer.cs
- AutoResizedEvent.cs
- ConfigXmlDocument.cs