Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / CommonUI / System / Drawing / Printing / PreviewPrintController.cs / 1305376 / PreviewPrintController.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Drawing.Printing { using Microsoft.Win32; using System; using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Drawing; using System.Drawing.Internal; using System.Drawing.Drawing2D; using System.Drawing.Imaging; using System.Drawing.Text; using System.Runtime.InteropServices; using System.Runtime.Versioning; using CodeAccessPermission = System.Security.CodeAccessPermission; ////// /// A PrintController which "prints" to a series of images. /// public class PreviewPrintController : PrintController { private IList list = new ArrayList(); // list of PreviewPageInfo private System.Drawing.Graphics graphics; private DeviceContext dc; private bool antiAlias; private void CheckSecurity() { IntSecurity.SafePrinting.Demand(); } ////// /// public override bool IsPreview { get { return true; } } ////// This is new public property which notifies if this controller is used for PrintPreview. /// ////// /// [ResourceExposure(ResourceScope.Process)] [ResourceConsumption(ResourceScope.Process)] public override void OnStartPrint(PrintDocument document, PrintEventArgs e) { Debug.Assert(dc == null && graphics == null, "PrintController methods called in the wrong order?"); // For security purposes, don't assume our public methods methods are called in any particular order CheckSecurity(); base.OnStartPrint(document, e); try { if (!document.PrinterSettings.IsValid) throw new InvalidPrinterException(document.PrinterSettings); IntSecurity.AllPrintingAndUnmanagedCode.Assert(); // We need a DC as a reference; we don't actually draw on it. // We make sure to reuse the same one to improve performance. dc = document.PrinterSettings.CreateInformationContext(modeHandle); } finally { CodeAccessPermission.RevertAssert(); } } ////// Implements StartPrint for generating print preview information. /// ////// /// [ResourceExposure(ResourceScope.Process)] [ResourceConsumption(ResourceScope.Machine | ResourceScope.Process, ResourceScope.Machine)] public override Graphics OnStartPage(PrintDocument document, PrintPageEventArgs e) { Debug.Assert(dc != null && graphics == null, "PrintController methods called in the wrong order?"); // For security purposes, don't assume our public methods methods are called in any particular order CheckSecurity(); base.OnStartPage(document, e); try { IntSecurity.AllPrintingAndUnmanagedCode.Assert(); e.PageSettings.CopyToHdevmode(modeHandle); Size size = e.PageBounds.Size; // Metafile framing rectangles apparently use hundredths of mm as their unit of measurement, // instead of the GDI+ standard hundredth of an inch. Size metafileSize = PrinterUnitConvert.Convert(size, PrinterUnit.Display, PrinterUnit.HundredthsOfAMillimeter); // Create a Metafile which accepts only GDI+ commands since we are the ones creating // and using this ... // Framework creates a dual-mode EMF for each page in the preview. // When these images are displayed in preview, // they are added to the dual-mode EMF. However, // GDI+ breaks during this process if the image // is sufficiently large and has more than 254 colors. // This code path can easily be avoided by requesting // an EmfPlusOnly EMF.. Metafile metafile = new Metafile(dc.Hdc, new Rectangle(0,0, metafileSize.Width, metafileSize.Height), MetafileFrameUnit.GdiCompatible, EmfType.EmfPlusOnly); PreviewPageInfo info = new PreviewPageInfo(metafile, size); list.Add(info); PrintPreviewGraphics printGraphics = new PrintPreviewGraphics(document, e); graphics = Graphics.FromImage(metafile); if (graphics != null && document.OriginAtMargins) { // Adjust the origin of the graphics object to be at the // user-specified margin location // int dpiX = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(dc, dc.Hdc), SafeNativeMethods.LOGPIXELSX); int dpiY = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(dc, dc.Hdc), SafeNativeMethods.LOGPIXELSY); int hardMarginX_DU = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(dc, dc.Hdc), SafeNativeMethods.PHYSICALOFFSETX); int hardMarginY_DU = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(dc, dc.Hdc), SafeNativeMethods.PHYSICALOFFSETY); float hardMarginX = hardMarginX_DU * 100 / dpiX; float hardMarginY = hardMarginY_DU * 100 / dpiY; graphics.TranslateTransform(-hardMarginX, -hardMarginY); graphics.TranslateTransform(document.DefaultPageSettings.Margins.Left, document.DefaultPageSettings.Margins.Top); } graphics.PrintingHelper = printGraphics; if (antiAlias) { graphics.TextRenderingHint = TextRenderingHint.AntiAlias; graphics.SmoothingMode = SmoothingMode.AntiAlias; } } finally { CodeAccessPermission.RevertAssert(); } return graphics; } ////// Implements StartEnd for generating print preview information. /// ////// /// public override void OnEndPage(PrintDocument document, PrintPageEventArgs e) { Debug.Assert(dc != null && graphics != null, "PrintController methods called in the wrong order?"); // For security purposes, don't assume our public methods methods are called in any particular order CheckSecurity(); graphics.Dispose(); graphics = null; base.OnEndPage(document, e); } ////// Implements EndPage for generating print preview information. /// ////// /// public override void OnEndPrint(PrintDocument document, PrintEventArgs e) { Debug.Assert(dc != null && graphics == null, "PrintController methods called in the wrong order?"); // For security purposes, don't assume our public methods are called in any particular order CheckSecurity(); dc.Dispose(); dc = null; base.OnEndPrint(document, e); } ////// Implements EndPrint for generating print preview information. /// ////// /// public PreviewPageInfo[] GetPreviewPageInfo() { // For security purposes, don't assume our public methods methods are called in any particular order CheckSecurity(); PreviewPageInfo[] temp = new PreviewPageInfo[list.Count]; list.CopyTo(temp, 0); return temp; } ////// The "printout". /// ///public virtual bool UseAntiAlias { get { return antiAlias; } set { antiAlias = value; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Drawing.Printing { using Microsoft.Win32; using System; using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Drawing; using System.Drawing.Internal; using System.Drawing.Drawing2D; using System.Drawing.Imaging; using System.Drawing.Text; using System.Runtime.InteropServices; using System.Runtime.Versioning; using CodeAccessPermission = System.Security.CodeAccessPermission; ////// /// A PrintController which "prints" to a series of images. /// public class PreviewPrintController : PrintController { private IList list = new ArrayList(); // list of PreviewPageInfo private System.Drawing.Graphics graphics; private DeviceContext dc; private bool antiAlias; private void CheckSecurity() { IntSecurity.SafePrinting.Demand(); } ////// /// public override bool IsPreview { get { return true; } } ////// This is new public property which notifies if this controller is used for PrintPreview. /// ////// /// [ResourceExposure(ResourceScope.Process)] [ResourceConsumption(ResourceScope.Process)] public override void OnStartPrint(PrintDocument document, PrintEventArgs e) { Debug.Assert(dc == null && graphics == null, "PrintController methods called in the wrong order?"); // For security purposes, don't assume our public methods methods are called in any particular order CheckSecurity(); base.OnStartPrint(document, e); try { if (!document.PrinterSettings.IsValid) throw new InvalidPrinterException(document.PrinterSettings); IntSecurity.AllPrintingAndUnmanagedCode.Assert(); // We need a DC as a reference; we don't actually draw on it. // We make sure to reuse the same one to improve performance. dc = document.PrinterSettings.CreateInformationContext(modeHandle); } finally { CodeAccessPermission.RevertAssert(); } } ////// Implements StartPrint for generating print preview information. /// ////// /// [ResourceExposure(ResourceScope.Process)] [ResourceConsumption(ResourceScope.Machine | ResourceScope.Process, ResourceScope.Machine)] public override Graphics OnStartPage(PrintDocument document, PrintPageEventArgs e) { Debug.Assert(dc != null && graphics == null, "PrintController methods called in the wrong order?"); // For security purposes, don't assume our public methods methods are called in any particular order CheckSecurity(); base.OnStartPage(document, e); try { IntSecurity.AllPrintingAndUnmanagedCode.Assert(); e.PageSettings.CopyToHdevmode(modeHandle); Size size = e.PageBounds.Size; // Metafile framing rectangles apparently use hundredths of mm as their unit of measurement, // instead of the GDI+ standard hundredth of an inch. Size metafileSize = PrinterUnitConvert.Convert(size, PrinterUnit.Display, PrinterUnit.HundredthsOfAMillimeter); // Create a Metafile which accepts only GDI+ commands since we are the ones creating // and using this ... // Framework creates a dual-mode EMF for each page in the preview. // When these images are displayed in preview, // they are added to the dual-mode EMF. However, // GDI+ breaks during this process if the image // is sufficiently large and has more than 254 colors. // This code path can easily be avoided by requesting // an EmfPlusOnly EMF.. Metafile metafile = new Metafile(dc.Hdc, new Rectangle(0,0, metafileSize.Width, metafileSize.Height), MetafileFrameUnit.GdiCompatible, EmfType.EmfPlusOnly); PreviewPageInfo info = new PreviewPageInfo(metafile, size); list.Add(info); PrintPreviewGraphics printGraphics = new PrintPreviewGraphics(document, e); graphics = Graphics.FromImage(metafile); if (graphics != null && document.OriginAtMargins) { // Adjust the origin of the graphics object to be at the // user-specified margin location // int dpiX = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(dc, dc.Hdc), SafeNativeMethods.LOGPIXELSX); int dpiY = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(dc, dc.Hdc), SafeNativeMethods.LOGPIXELSY); int hardMarginX_DU = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(dc, dc.Hdc), SafeNativeMethods.PHYSICALOFFSETX); int hardMarginY_DU = UnsafeNativeMethods.GetDeviceCaps(new HandleRef(dc, dc.Hdc), SafeNativeMethods.PHYSICALOFFSETY); float hardMarginX = hardMarginX_DU * 100 / dpiX; float hardMarginY = hardMarginY_DU * 100 / dpiY; graphics.TranslateTransform(-hardMarginX, -hardMarginY); graphics.TranslateTransform(document.DefaultPageSettings.Margins.Left, document.DefaultPageSettings.Margins.Top); } graphics.PrintingHelper = printGraphics; if (antiAlias) { graphics.TextRenderingHint = TextRenderingHint.AntiAlias; graphics.SmoothingMode = SmoothingMode.AntiAlias; } } finally { CodeAccessPermission.RevertAssert(); } return graphics; } ////// Implements StartEnd for generating print preview information. /// ////// /// public override void OnEndPage(PrintDocument document, PrintPageEventArgs e) { Debug.Assert(dc != null && graphics != null, "PrintController methods called in the wrong order?"); // For security purposes, don't assume our public methods methods are called in any particular order CheckSecurity(); graphics.Dispose(); graphics = null; base.OnEndPage(document, e); } ////// Implements EndPage for generating print preview information. /// ////// /// public override void OnEndPrint(PrintDocument document, PrintEventArgs e) { Debug.Assert(dc != null && graphics == null, "PrintController methods called in the wrong order?"); // For security purposes, don't assume our public methods are called in any particular order CheckSecurity(); dc.Dispose(); dc = null; base.OnEndPrint(document, e); } ////// Implements EndPrint for generating print preview information. /// ////// /// public PreviewPageInfo[] GetPreviewPageInfo() { // For security purposes, don't assume our public methods methods are called in any particular order CheckSecurity(); PreviewPageInfo[] temp = new PreviewPageInfo[list.Count]; list.CopyTo(temp, 0); return temp; } ////// The "printout". /// ///public virtual bool UseAntiAlias { get { return antiAlias; } set { antiAlias = value; } } } } // 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
- WinEventHandler.cs
- MarkupExtensionParser.cs
- TextEffect.cs
- SocketCache.cs
- DataServiceClientException.cs
- DataGridItemEventArgs.cs
- ClientSettingsProvider.cs
- WebPartCatalogCloseVerb.cs
- DesignTimeVisibleAttribute.cs
- CommunicationObjectFaultedException.cs
- FontStyleConverter.cs
- ServiceDiscoveryElement.cs
- SQLResource.cs
- CrossContextChannel.cs
- _BufferOffsetSize.cs
- BaseCollection.cs
- LinearGradientBrush.cs
- ConnectorEditor.cs
- RTLAwareMessageBox.cs
- XNodeValidator.cs
- TreeNodeCollectionEditor.cs
- PolicyManager.cs
- CommandPlan.cs
- ErrorFormatterPage.cs
- PartialList.cs
- OdbcConnection.cs
- Vector3DAnimation.cs
- Rect3D.cs
- WmpBitmapDecoder.cs
- AffineTransform3D.cs
- DesignerHelpers.cs
- QilBinary.cs
- TemplateDefinition.cs
- ServiceThrottlingElement.cs
- XmlQualifiedNameTest.cs
- ModelItem.cs
- SharedDp.cs
- UpdateException.cs
- ObjectView.cs
- securitymgrsite.cs
- DeploymentSection.cs
- WebDisplayNameAttribute.cs
- ToolStripRenderer.cs
- TemplateParser.cs
- WasHostedComPlusFactory.cs
- WeakReferenceList.cs
- RepeaterItemEventArgs.cs
- CompoundFileIOPermission.cs
- Size3D.cs
- SchemaElementDecl.cs
- TreeViewCancelEvent.cs
- SqlClientFactory.cs
- RenderingBiasValidation.cs
- SafeFileHandle.cs
- ObjectConverter.cs
- BitmapEffectGroup.cs
- DesignerProperties.cs
- _NTAuthentication.cs
- SelectedDatesCollection.cs
- SerialPinChanges.cs
- PackagePartCollection.cs
- Int64Animation.cs
- LogicalTreeHelper.cs
- TypeUtils.cs
- DataGridViewCheckBoxColumn.cs
- Selector.cs
- DataGridParentRows.cs
- PropertyBuilder.cs
- ListItemConverter.cs
- HandleScope.cs
- SendReply.cs
- SimpleLine.cs
- SchemaReference.cs
- DefaultHttpHandler.cs
- BooleanKeyFrameCollection.cs
- UrlMappingsSection.cs
- XmlSchemaSimpleTypeList.cs
- XmlLinkedNode.cs
- WindowsGraphicsWrapper.cs
- HttpPostLocalhostServerProtocol.cs
- Identity.cs
- QilLiteral.cs
- TextEditorTyping.cs
- LogLogRecordHeader.cs
- Binding.cs
- StateChangeEvent.cs
- XamlTreeBuilder.cs
- SspiNegotiationTokenAuthenticatorState.cs
- EncodingInfo.cs
- TypedColumnHandler.cs
- DataErrorValidationRule.cs
- SqlError.cs
- XmlComplianceUtil.cs
- ConfigXmlSignificantWhitespace.cs
- UnsafeNativeMethods.cs
- EntityDataSourceReferenceGroup.cs
- RenderTargetBitmap.cs
- RectangleHotSpot.cs
- ScrollData.cs
- TransactionManager.cs