/// <summary>
/// Returns true if print was aborted.
/// </summary>
/// <remarks>
/// If you have nested PrintControllers, this method won't get called on the inner one
/// Add initialization code to StartPrint or StartPage instead.
/// </remarks>
private bool PrintLoop(PrintDocument document)
{
QueryPageSettingsEventArgs queryEvent = new QueryPageSettingsEventArgs((PageSettings)document.DefaultPageSettings.Clone());
while (true)
{
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);
}
}
}
private bool PrintLoopOptimized(PrintDocument document)
{
PrintPageEventArgs? pageEvent = null;
PageSettings documentPageSettings = (PageSettings)document.DefaultPageSettings.Clone();
QueryPageSettingsEventArgs queryEvent = new QueryPageSettingsEventArgs(documentPageSettings);
while (true)
{
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);
}
}
}
