Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / CommonUI / System / Drawing / Printing / PrintController.cs / 1 / PrintController.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Drawing.Printing { using Microsoft.Win32; using System; using System.Diagnostics; using System.Drawing; using System.Runtime.InteropServices; using System.Security; using System.Security.Permissions; ////// /// public abstract class PrintController { // DEVMODEs are pretty expensive, so we cache one here and share it with the // Standard and Preview print controllers. If it weren't for all the rules about API changes, // I'd consider making this protected. internal IntPtr modeHandle = IntPtr.Zero; // initialized in StartPrint ///Controls how a document is printed. ////// /// protected PrintController() { IntSecurity.SafePrinting.Demand(); } ////// Initializes a new instance of the ///class. /// /// /// public virtual bool IsPreview { get{ return false; } } // WARNING: if you have nested PrintControllers, this method won't get called on the inner one. // Add initialization code to StartPrint or StartPage instead. internal void Print(PrintDocument document) { IntSecurity.SafePrinting.Demand(); // Most of the printing security is left to the individual print controller // // Get the PrintAction for this event PrintAction printAction; if (IsPreview) { printAction = PrintAction.PrintToPreview; } else { printAction = document.PrinterSettings.PrintToFile ? PrintAction.PrintToFile : PrintAction.PrintToPrinter; } // Check that user has permission to print to this particular printer PrintEventArgs printEvent = new PrintEventArgs(printAction); document._OnBeginPrint(printEvent); if (printEvent.Cancel) { document._OnEndPrint(printEvent); return; } OnStartPrint(document, printEvent); if (printEvent.Cancel) { document._OnEndPrint(printEvent); OnEndPrint(document, printEvent); return; } bool canceled = true; try { canceled = PrintLoop(document); } finally { try { try { document._OnEndPrint(printEvent); printEvent.Cancel = canceled | printEvent.Cancel; } finally { OnEndPrint(document, printEvent); } } finally { if (!IntSecurity.HasPermission(IntSecurity.AllPrinting)) { // Ensure programs with SafePrinting only get to print once for each time they // throw up the PrintDialog. IntSecurity.AllPrinting.Assert(); document.PrinterSettings.PrintDialogDisplayed = false; } } } } // Returns true if print was aborted. // WARNING: if you have nested PrintControllers, this method won't get called on the inner one // Add initialization code to StartPrint or StartPage instead. private bool PrintLoop(PrintDocument document) { QueryPageSettingsEventArgs queryEvent = new QueryPageSettingsEventArgs((PageSettings) document.DefaultPageSettings.Clone()); for (;;) { document._OnQueryPageSettings(queryEvent); if (queryEvent.Cancel) { return true; } PrintPageEventArgs pageEvent = CreatePrintPageEvent(queryEvent.PageSettings); Graphics graphics = OnStartPage(document, pageEvent); pageEvent.SetGraphics(graphics); try { document._OnPrintPage(pageEvent); OnEndPage(document, pageEvent); } finally { pageEvent.Dispose(); } if (pageEvent.Cancel) { return true; } else if (!pageEvent.HasMorePages) { return false; } else { // loop } } } private PrintPageEventArgs CreatePrintPageEvent(PageSettings pageSettings) { IntSecurity.AllPrintingAndUnmanagedCode.Assert(); Debug.Assert(modeHandle != IntPtr.Zero, "modeHandle is null. Someone must have forgot to call base.StartPrint"); Rectangle pageBounds = pageSettings.GetBounds(modeHandle); Rectangle marginBounds = new Rectangle(pageSettings.Margins.Left, pageSettings.Margins.Top, pageBounds.Width - (pageSettings.Margins.Left + pageSettings.Margins.Right), pageBounds.Height - (pageSettings.Margins.Top + pageSettings.Margins.Bottom)); PrintPageEventArgs pageEvent = new PrintPageEventArgs(null, marginBounds, pageBounds, pageSettings); return pageEvent; } ////// This is new public property which notifies if this controller is used for PrintPreview. /// ////// /// public virtual void OnStartPrint(PrintDocument document, PrintEventArgs e) { IntSecurity.AllPrintingAndUnmanagedCode.Assert(); modeHandle = document.PrinterSettings.GetHdevmode(document.DefaultPageSettings); } ///When overridden in a derived class, begins the control sequence of when and how to print a document. ////// /// public virtual Graphics OnStartPage(PrintDocument document, PrintPageEventArgs e) { return null; } ///When overridden in a derived class, begins the control /// sequence of when and how to print a page in a document. ////// /// public virtual void OnEndPage(PrintDocument document, PrintPageEventArgs e) { } ///When overridden in a derived class, completes the control sequence of when and how /// to print a page in a document. ////// /// public virtual void OnEndPrint(PrintDocument document, PrintEventArgs e) { IntSecurity.UnmanagedCode.Assert(); Debug.Assert(modeHandle != IntPtr.Zero, "modeHandle is null. Someone must have forgot to call base.StartPrint"); SafeNativeMethods.GlobalFree(new HandleRef(this, modeHandle)); modeHandle = IntPtr.Zero; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.When overridden in a derived class, completes the /// control sequence of when and how to print a document. ///
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- InternalPolicyElement.cs
- XmlHelper.cs
- WebPartZoneCollection.cs
- Throw.cs
- WindowPattern.cs
- CompilerTypeWithParams.cs
- ExtensionSurface.cs
- DbDataReader.cs
- UndoManager.cs
- LinqDataSourceSelectEventArgs.cs
- HttpPostedFile.cs
- AdornerLayer.cs
- ExpressionNode.cs
- StateManagedCollection.cs
- TextBreakpoint.cs
- IfAction.cs
- DataBindingList.cs
- SmtpMail.cs
- BasicHttpSecurityElement.cs
- HttpListenerException.cs
- Stack.cs
- Pair.cs
- MediaContext.cs
- ToolStripAdornerWindowService.cs
- MetadataCacheItem.cs
- InternalRelationshipCollection.cs
- FormView.cs
- GreenMethods.cs
- WebException.cs
- Menu.cs
- ReceiveCompletedEventArgs.cs
- SkewTransform.cs
- TextEndOfParagraph.cs
- SqlResolver.cs
- NumberFormatInfo.cs
- ConfigurationErrorsException.cs
- PixelShader.cs
- CSharpCodeProvider.cs
- AssociatedControlConverter.cs
- ObjectConverter.cs
- AdPostCacheSubstitution.cs
- HwndTarget.cs
- ToolStripItemClickedEventArgs.cs
- SqlWebEventProvider.cs
- TrustManager.cs
- DBConcurrencyException.cs
- HttpFileCollection.cs
- MultipleViewPattern.cs
- SqlConnectionPoolGroupProviderInfo.cs
- SQLMoneyStorage.cs
- TextOptions.cs
- DbDataReader.cs
- ChildDocumentBlock.cs
- ListViewGroup.cs
- Nullable.cs
- ServicePoint.cs
- Overlapped.cs
- NullToBooleanConverter.cs
- UTF8Encoding.cs
- CodeThrowExceptionStatement.cs
- CacheOutputQuery.cs
- ColumnMapVisitor.cs
- Utils.cs
- DesignerPainter.cs
- RuntimeArgument.cs
- SystemTcpConnection.cs
- DataBoundLiteralControl.cs
- XmlChoiceIdentifierAttribute.cs
- GridPatternIdentifiers.cs
- MeasurementDCInfo.cs
- DateTimeFormatInfoScanner.cs
- TraceFilter.cs
- RectAnimationClockResource.cs
- FrameworkObject.cs
- DataGridViewCellCancelEventArgs.cs
- InputEventArgs.cs
- ImpersonateTokenRef.cs
- PropertyPathConverter.cs
- SmtpNetworkElement.cs
- WindowShowOrOpenTracker.cs
- SelectionItemProviderWrapper.cs
- AccessDataSourceView.cs
- NativeMethods.cs
- Dictionary.cs
- AbstractSvcMapFileLoader.cs
- PathSegment.cs
- MessageQueueKey.cs
- SubMenuStyleCollection.cs
- NameValueConfigurationCollection.cs
- CodeDOMProvider.cs
- RelationshipEndCollection.cs
- TemplateBaseAction.cs
- TreeViewImageKeyConverter.cs
- ScriptingJsonSerializationSection.cs
- EventHandlersDesigner.cs
- OrderablePartitioner.cs
- SqlTypeConverter.cs
- NetCodeGroup.cs
- TabletDevice.cs
- OuterProxyWrapper.cs