private bool PrintLoopOptimized(PrintDocument document)
{
PrintPageEventArgs pageEvent = null;
PageSettings documentPageSettings = (PageSettings)document.DefaultPageSettings.Clone();
QueryPageSettingsEventArgs queryEvent = new QueryPageSettingsEventArgs(documentPageSettings);
for (;;)
{
queryEvent.PageSettingsChanged = false;
document._OnQueryPageSettings(queryEvent);
if (queryEvent.Cancel)
{
return(true);
}
if (!queryEvent.PageSettingsChanged)
{
// QueryPageSettings event handler did not change the page settings,
// thus we use default page settings from the document object.
if (pageEvent == null)
{
pageEvent = CreatePrintPageEvent(queryEvent.PageSettings);
}
else
{
// This is not the first page and the settings had not changed since the previous page,
// thus don't re-apply them.
pageEvent.CopySettingsToDevMode = false;
}
Graphics graphics = OnStartPage(document, pageEvent);
pageEvent.SetGraphics(graphics);
}
else
{
// Page settings were customized, so use the customized ones in the start page event.
pageEvent = CreatePrintPageEvent(queryEvent.PageSettings);
Graphics graphics = OnStartPage(document, pageEvent);
pageEvent.SetGraphics(graphics);
}
try {
document._OnPrintPage(pageEvent);
OnEndPage(document, pageEvent);
}
finally {
pageEvent.Graphics.Dispose();
pageEvent.SetGraphics(null);
}
if (pageEvent.Cancel)
{
return(true);
}
else if (!pageEvent.HasMorePages)
{
return(false);
}
}
}
public override Graphics OnStartPage(PrintDocument document, PrintPageEventArgs e)
{
var result = PMSessionBeginPageNoDialog(
sessionHandle,
e.PageSettings == null || e.PageSettings == document.DefaultPageSettings ? IntPtr.Zero : e.PageSettings.print_info.GetPMPageFormat(),
IntPtr.Zero);
IntPtr contextHandle;
PMSessionGetCGGraphicsContext(sessionHandle, out contextHandle);
e.SetGraphics(new Graphics(new CGContext(contextHandle), false));
return(e.Graphics);
}
// 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
}
}
}
// methods
public void Print()
{
PrintEventArgs printArgs = new PrintEventArgs();
this.OnBeginPrint(printArgs);
if (printArgs.Cancel)
{
return;
}
PrintController.OnStartPrint(this, printArgs);
if (printArgs.Cancel)
{
return;
}
Graphics g = null;
if (printArgs.GraphicsContext != null)
{
g = Graphics.FromHdc(printArgs.GraphicsContext.Hdc);
printArgs.GraphicsContext.Graphics = g;
}
// while there are more pages
PrintPageEventArgs printPageArgs;
do
{
QueryPageSettingsEventArgs queryPageSettingsArgs = new QueryPageSettingsEventArgs(
DefaultPageSettings.Clone() as PageSettings);
OnQueryPageSettings(queryPageSettingsArgs);
PageSettings pageSettings = queryPageSettingsArgs.PageSettings;
printPageArgs = new PrintPageEventArgs(
g,
pageSettings.Bounds,
new Rectangle(0, 0, pageSettings.PaperSize.Width, pageSettings.PaperSize.Height),
pageSettings);
// TODO: We should create a graphics context for each page since they can have diferent paper
// size, orientation, etc. We use a single graphic for now to keep Cairo using a single PDF file.
printPageArgs.GraphicsContext = printArgs.GraphicsContext;
Graphics pg = PrintController.OnStartPage(this, printPageArgs);
// assign Graphics in printPageArgs
printPageArgs.SetGraphics(pg);
if (!printPageArgs.Cancel)
{
this.OnPrintPage(printPageArgs);
}
PrintController.OnEndPage(this, printPageArgs);
if (printPageArgs.Cancel)
{
break;
}
} while (printPageArgs.HasMorePages);
this.OnEndPrint(printArgs);
PrintController.OnEndPrint(this, printArgs);
}
// methods
public void Print(){
PrintEventArgs printArgs = new PrintEventArgs();
this.OnBeginPrint(printArgs);
if (printArgs.Cancel)
return;
PrintController.OnStartPrint(this, printArgs);
if (printArgs.Cancel)
return;
Graphics g = null;
if (printArgs.GraphicsContext != null) {
g = Graphics.FromHdc (printArgs.GraphicsContext.Hdc);
printArgs.GraphicsContext.Graphics = g;
}
// while there are more pages
PrintPageEventArgs printPageArgs;
do
{
QueryPageSettingsEventArgs queryPageSettingsArgs = new QueryPageSettingsEventArgs (
DefaultPageSettings.Clone () as PageSettings);
OnQueryPageSettings (queryPageSettingsArgs);
PageSettings pageSettings = queryPageSettingsArgs.PageSettings;
printPageArgs = new PrintPageEventArgs(
g,
pageSettings.Bounds,
new Rectangle(0, 0, pageSettings.PaperSize.Width, pageSettings.PaperSize.Height),
pageSettings);
// TODO: We should create a graphics context for each page since they can have diferent paper
// size, orientation, etc. We use a single graphic for now to keep Cairo using a single PDF file.
printPageArgs.GraphicsContext = printArgs.GraphicsContext;
Graphics pg = PrintController.OnStartPage(this, printPageArgs);
// assign Graphics in printPageArgs
printPageArgs.SetGraphics(pg);
if (!printPageArgs.Cancel)
this.OnPrintPage(printPageArgs);
PrintController.OnEndPage(this, printPageArgs);
if (printPageArgs.Cancel)
break;
} while (printPageArgs.HasMorePages);
this.OnEndPrint(printArgs);
PrintController.OnEndPrint(this, printArgs);
}
