Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Misc / GDI / WindowsBrush.cs / 1305376 / WindowsBrush.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- [assembly: System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode", Scope="member", Target="System.Windows.Forms.Internal.WindowsBrush.FromLogBrush(System.Windows.Forms.Internal.IntNativeMethods+LOGBRUSH):System.Windows.Forms.Internal.WindowsBrush")] [assembly: System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode", Scope="member", Target="System.Windows.Forms.Internal.WindowsBrush.FromHdc(System.IntPtr):System.Windows.Forms.Internal.WindowsBrush")] [assembly: System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode", Scope="member", Target="System.Windows.Forms.Internal.WindowsBrush.FromBrush(System.Drawing.Brush):System.Windows.Forms.Internal.WindowsBrush")] #if [....]_NAMESPACE namespace System.Windows.Forms.Internal #elif DRAWING_NAMESPACE namespace System.Drawing.Internal #else namespace System.Experimental.Gdi #endif { using System; using System.Internal; using System.Runtime.InteropServices; using System.ComponentModel; using System.Diagnostics; using System.Drawing; using System.Runtime.Versioning; ////// #if [....]_PUBLIC_GRAPHICS_LIBRARY public #else internal #endif abstract class WindowsBrush : MarshalByRefObject, ICloneable, IDisposable { // Handle to the native Windows brush object. // private DeviceContext dc; private IntPtr nativeHandle; // Cannot be protected because the class is internal (C# doesn't allow it). private Color color = Color.White; // GDI brushes have just one color as opposed to GDI+ that can have background color. // Note: We may need to implement background color too. #if WINGRAPHICS_FINALIZATION_WATCH private string AllocationSite = DbgUtil.StackTrace; #endif public abstract object Clone(); // Declaration required by C# even though this is an abstract class. protected abstract void CreateBrush(); ////// Encapsulates a GDI Brush object. /// ////// Parameterless constructor to use default color. /// Notice that the actual object construction is done in the derived classes. /// [ResourceExposure(ResourceScope.Process)] public WindowsBrush(DeviceContext dc) { this.dc = dc; } [ResourceExposure(ResourceScope.Process)] public WindowsBrush(DeviceContext dc, Color color) { this.dc = dc; this.color = color; } ~WindowsBrush() { Dispose(false); } protected DeviceContext DC { get { return this.dc; } } public void Dispose() { Dispose(true); } protected virtual void Dispose(bool disposing) { if (dc != null && this.nativeHandle != IntPtr.Zero) { DbgUtil.AssertFinalization(this, disposing); dc.DeleteObject(this.nativeHandle, GdiObjectType.Brush); this.nativeHandle = IntPtr.Zero; } if (disposing) { GC.SuppressFinalize(this); } } public Color Color { get { return this.color; } } ////// Gets the native Win32 brush handle. It creates it on demand. /// protected IntPtr NativeHandle { get { if( this.nativeHandle == IntPtr.Zero ) { CreateBrush(); } return this.nativeHandle; } set { Debug.Assert(this.nativeHandle == IntPtr.Zero, "WindowsBrush object is immutable"); Debug.Assert(value != IntPtr.Zero, "WARNING: assigning IntPtr.Zero to the nativeHandle object."); this.nativeHandle = value; } } #if [....]_PUBLIC_GRAPHICS_LIBRARY ////// Derived classes implement this method to get a native GDI brush wrapper with the same /// properties as this object. /// [ResourceExposure(ResourceScope.Process)] [ResourceConsumption(ResourceScope.Process)] public static WindowsBrush FromBrush(DeviceContext dc, Brush originalBrush) { if(originalBrush is SolidBrush) { return new WindowsSolidBrush(dc, ((SolidBrush)originalBrush).Color); } if(originalBrush is System.Drawing.Drawing2D.HatchBrush) { System.Drawing.Drawing2D.HatchBrush hatchBrush = ((System.Drawing.Drawing2D.HatchBrush)originalBrush); return new WindowsHatchBrush(dc, (WindowsHatchStyle) hatchBrush.HatchStyle, hatchBrush.ForegroundColor, hatchBrush.BackgroundColor); } /* */ Debug.Fail("Don't know how to convert this brush!"); return null; } ////// Creates a WindowsBrush from the DC currently selected HBRUSH /// [ResourceExposure(ResourceScope.Process)] [ResourceConsumption(ResourceScope.Process)] public static WindowsBrush FromDC(DeviceContext dc) { IntPtr hBrush = IntUnsafeNativeMethods.GetCurrentObject(new HandleRef(null, dc.Hdc), IntNativeMethods.OBJ_BRUSH); IntNativeMethods.LOGBRUSH logBrush = new IntNativeMethods.LOGBRUSH(); IntUnsafeNativeMethods.GetObject(new HandleRef(null, hBrush), logBrush); // don't call DeleteObject on handle from GetCurrentObject, it is the one selected in the hdc. return WindowsBrush.FromLogBrush(dc, logBrush ); } ////// Creates a WindowsBrush from a LOGBRUSH. /// [ResourceExposure(ResourceScope.Process)] [ResourceConsumption(ResourceScope.Process)] public static WindowsBrush FromLogBrush( DeviceContext dc, IntNativeMethods.LOGBRUSH logBrush ) { Debug.Assert( logBrush != null, "logBrush is null" ); switch( logBrush.lbStyle ) { // currently supported brushes: case IntNativeMethods.BS_HATCHED: return new WindowsHatchBrush(dc, (WindowsHatchStyle) logBrush.lbHatch ); case IntNativeMethods.BS_SOLID: return new WindowsSolidBrush( dc, Color.FromArgb(logBrush.lbColor) ); default: Debug.Fail( "Don't know how to create WindowsBrush from specified logBrush" ); return null; } } #endif ////// public IntPtr HBrush { get { return this.NativeHandle; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007./// Returns the native Win32 brush handle. /// ///
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SupportsEventValidationAttribute.cs
- NavigationHelper.cs
- ListViewPagedDataSource.cs
- WindowInteractionStateTracker.cs
- InkCanvasSelection.cs
- RefreshEventArgs.cs
- UrlPropertyAttribute.cs
- XmlReflectionMember.cs
- BrowserDefinition.cs
- SoapFault.cs
- RemotingService.cs
- HtmlInputImage.cs
- Bits.cs
- XmlTextReader.cs
- VectorConverter.cs
- UInt64Storage.cs
- DataBoundControlAdapter.cs
- PathFigureCollection.cs
- VisualBrush.cs
- EdmRelationshipNavigationPropertyAttribute.cs
- Matrix.cs
- CaseStatementProjectedSlot.cs
- CircleEase.cs
- QueryOpeningEnumerator.cs
- TryExpression.cs
- XPathPatternBuilder.cs
- MemberRestriction.cs
- ItemDragEvent.cs
- NativeMethods.cs
- EntityConnectionStringBuilder.cs
- ReadWriteSpinLock.cs
- ColorConverter.cs
- RowToFieldTransformer.cs
- ServerValidateEventArgs.cs
- Crypto.cs
- OLEDB_Util.cs
- ProfileSettingsCollection.cs
- ToolboxItem.cs
- System.Data.OracleClient_BID.cs
- PointAnimationUsingKeyFrames.cs
- BaseComponentEditor.cs
- SoapInteropTypes.cs
- ComponentSerializationService.cs
- BaseDataListDesigner.cs
- SqlDataSourceFilteringEventArgs.cs
- XmlDataImplementation.cs
- DynamicDataManager.cs
- Int32AnimationBase.cs
- RoleGroup.cs
- BaseComponentEditor.cs
- BrushValueSerializer.cs
- TextBoxDesigner.cs
- DeclarativeCatalogPart.cs
- XmlSerializableWriter.cs
- BasicAsyncResult.cs
- PropertyGridCommands.cs
- XmlSchemaIdentityConstraint.cs
- ManifestResourceInfo.cs
- SecurityException.cs
- DataMisalignedException.cs
- SplashScreenNativeMethods.cs
- SecurityTokenProvider.cs
- WindowExtensionMethods.cs
- ValidatedMobileControlConverter.cs
- UserControlAutomationPeer.cs
- XamlPointCollectionSerializer.cs
- CompareValidator.cs
- DelegateTypeInfo.cs
- CompoundFileReference.cs
- InsufficientMemoryException.cs
- RectConverter.cs
- GlobalEventManager.cs
- HttpListener.cs
- SupportsEventValidationAttribute.cs
- RegistryPermission.cs
- DataGridViewControlCollection.cs
- __FastResourceComparer.cs
- TargetException.cs
- Update.cs
- SoapSchemaImporter.cs
- Constants.cs
- WebConfigurationHostFileChange.cs
- IDispatchConstantAttribute.cs
- PixelFormatConverter.cs
- WebPartHeaderCloseVerb.cs
- RequestContext.cs
- TemplatedEditableDesignerRegion.cs
- bidPrivateBase.cs
- InvokeHandlers.cs
- GZipStream.cs
- SyntaxCheck.cs
- ColorTranslator.cs
- ScrollContentPresenter.cs
- HttpModuleCollection.cs
- SkipStoryboardToFill.cs
- ReadOnlyPropertyMetadata.cs
- FamilyMap.cs
- _NetRes.cs
- StateMachineWorkflowDesigner.cs
- RuleInfoComparer.cs