Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / CommonUI / System / Drawing / GraphicsContext.cs / 1 / GraphicsContext.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Drawing { using System; using System.Drawing.Drawing2D; using System.Diagnostics; ////// Contains information about the context of a Graphics object. /// internal class GraphicsContext : IDisposable { ////// The state that identifies the context. /// private int contextState; ////// The context's translate transform. /// private PointF transformOffset; ////// The context's clip region. /// private Region clipRegion; ////// The next context up the stack. /// private GraphicsContext nextContext; ////// The previous context down the stack. /// private GraphicsContext prevContext; ////// Flags that determines whether the context was created for a Graphics.Save() operation. /// This kind of contexts are cumulative across subsequent Save() calls so the top context /// info is cumulative. This is not the same for contexts created for a Graphics.BeginContainer() /// operation, in this case the new context information is reset. See Graphics.BeginContainer() /// and Graphics.Save() for more information. /// bool isCumulative; ////// Private constructor disallowed. /// private GraphicsContext() { } public GraphicsContext(Graphics g) { Matrix transform = g.Transform; if (!transform.IsIdentity) { float[] elements = transform.Elements; this.transformOffset.X = elements[4]; this.transformOffset.Y = elements[5]; } transform.Dispose(); Region clip = g.Clip; if (clip.IsInfinite(g)) { clip.Dispose(); } else { this.clipRegion = clip; } } ////// Disposes this and all contexts up the stack. /// public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } ////// Disposes this and all contexts up the stack. /// public void Dispose(bool disposing) { if (this.nextContext != null) { // Dispose all contexts up the stack since they are relative to this one and its state will be invalid. this.nextContext.Dispose(); this.nextContext = null; } if (this.clipRegion != null) { this.clipRegion.Dispose(); this.clipRegion = null; } } ////// The state id representing the GraphicsContext. /// public int State { get { return this.contextState; } set { this.contextState = value; } } ////// The translate transform in the GraphicsContext. /// public PointF TransformOffset { get { return this.transformOffset; } } ////// The clipping region the GraphicsContext. /// public Region Clip { get { return this.clipRegion; } } ////// The next GraphicsContext object in the stack. /// public GraphicsContext Next { get { return this.nextContext; } set { this.nextContext = value; } } ////// The previous GraphicsContext object in the stack. /// public GraphicsContext Previous { get { return this.prevContext; } set { this.prevContext = value; } } ////// Determines whether this context is cumulative or not. See filed for more info. /// public bool IsCumulative { get { return this.isCumulative; } set { this.isCumulative = value; } } } } // 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. // //----------------------------------------------------------------------------- namespace System.Drawing { using System; using System.Drawing.Drawing2D; using System.Diagnostics; ////// Contains information about the context of a Graphics object. /// internal class GraphicsContext : IDisposable { ////// The state that identifies the context. /// private int contextState; ////// The context's translate transform. /// private PointF transformOffset; ////// The context's clip region. /// private Region clipRegion; ////// The next context up the stack. /// private GraphicsContext nextContext; ////// The previous context down the stack. /// private GraphicsContext prevContext; ////// Flags that determines whether the context was created for a Graphics.Save() operation. /// This kind of contexts are cumulative across subsequent Save() calls so the top context /// info is cumulative. This is not the same for contexts created for a Graphics.BeginContainer() /// operation, in this case the new context information is reset. See Graphics.BeginContainer() /// and Graphics.Save() for more information. /// bool isCumulative; ////// Private constructor disallowed. /// private GraphicsContext() { } public GraphicsContext(Graphics g) { Matrix transform = g.Transform; if (!transform.IsIdentity) { float[] elements = transform.Elements; this.transformOffset.X = elements[4]; this.transformOffset.Y = elements[5]; } transform.Dispose(); Region clip = g.Clip; if (clip.IsInfinite(g)) { clip.Dispose(); } else { this.clipRegion = clip; } } ////// Disposes this and all contexts up the stack. /// public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } ////// Disposes this and all contexts up the stack. /// public void Dispose(bool disposing) { if (this.nextContext != null) { // Dispose all contexts up the stack since they are relative to this one and its state will be invalid. this.nextContext.Dispose(); this.nextContext = null; } if (this.clipRegion != null) { this.clipRegion.Dispose(); this.clipRegion = null; } } ////// The state id representing the GraphicsContext. /// public int State { get { return this.contextState; } set { this.contextState = value; } } ////// The translate transform in the GraphicsContext. /// public PointF TransformOffset { get { return this.transformOffset; } } ////// The clipping region the GraphicsContext. /// public Region Clip { get { return this.clipRegion; } } ////// The next GraphicsContext object in the stack. /// public GraphicsContext Next { get { return this.nextContext; } set { this.nextContext = value; } } ////// The previous GraphicsContext object in the stack. /// public GraphicsContext Previous { get { return this.prevContext; } set { this.prevContext = value; } } ////// Determines whether this context is cumulative or not. See filed for more info. /// public bool IsCumulative { get { return this.isCumulative; } set { this.isCumulative = value; } } } } // 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
- DispatcherProcessingDisabled.cs
- ServerIdentity.cs
- dbdatarecord.cs
- DecoratedNameAttribute.cs
- SqlTriggerContext.cs
- ProviderBase.cs
- ResourceWriter.cs
- PassportAuthentication.cs
- WinCategoryAttribute.cs
- RowToParametersTransformer.cs
- InvalidAsynchronousStateException.cs
- RuleSettings.cs
- MaxSessionCountExceededException.cs
- SizeFConverter.cs
- IdentityModelDictionary.cs
- UnicastIPAddressInformationCollection.cs
- XmlWhitespace.cs
- DelimitedListTraceListener.cs
- ConfigXmlAttribute.cs
- XPathDocumentIterator.cs
- SQLDoubleStorage.cs
- ClientSettingsSection.cs
- IsolatedStorageFile.cs
- WindowsMenu.cs
- Transform3DCollection.cs
- XmlElement.cs
- PersonalizationState.cs
- ProfileEventArgs.cs
- TdsParserStaticMethods.cs
- PenContext.cs
- AppSettingsSection.cs
- SectionInput.cs
- UserControlDesigner.cs
- FileVersion.cs
- DataListItem.cs
- AuthStoreRoleProvider.cs
- OracleDataAdapter.cs
- XmlILModule.cs
- TouchesOverProperty.cs
- Win32MouseDevice.cs
- EventLevel.cs
- CornerRadiusConverter.cs
- ExtensibleClassFactory.cs
- PasswordRecovery.cs
- FilePrompt.cs
- BuildProvider.cs
- XmlSiteMapProvider.cs
- HwndMouseInputProvider.cs
- WindowsAuthenticationEventArgs.cs
- Brush.cs
- PagerSettings.cs
- VisualTransition.cs
- ObjectDataSource.cs
- ContractCodeDomInfo.cs
- DataContext.cs
- Rectangle.cs
- GridViewRow.cs
- Propagator.cs
- QualifiedCellIdBoolean.cs
- InputScopeAttribute.cs
- ColorAnimationUsingKeyFrames.cs
- DispatcherTimer.cs
- AutoGeneratedField.cs
- GeneralTransformGroup.cs
- PassportAuthenticationModule.cs
- Adorner.cs
- ViewManager.cs
- CharEnumerator.cs
- CreateParams.cs
- dataSvcMapFileLoader.cs
- PageParserFilter.cs
- SynchronizingStream.cs
- LocalizabilityAttribute.cs
- DataSourceCacheDurationConverter.cs
- MailWriter.cs
- COM2PictureConverter.cs
- FacetDescription.cs
- SplitContainer.cs
- CodeMethodInvokeExpression.cs
- PageBuildProvider.cs
- CompiledQueryCacheEntry.cs
- ListBoxItem.cs
- _SpnDictionary.cs
- ActivityStatusChangeEventArgs.cs
- DataSourceHelper.cs
- FileBasedResourceGroveler.cs
- DetailsViewDeleteEventArgs.cs
- DBSchemaTable.cs
- SurrogateSelector.cs
- Unit.cs
- GridView.cs
- SubMenuStyle.cs
- XmlAutoDetectWriter.cs
- nulltextcontainer.cs
- XmlSchemaObjectTable.cs
- AnonymousIdentificationSection.cs
- DetailsView.cs
- FlagPanel.cs
- ImportRequest.cs
- IntegerValidator.cs