/// <summary>
/// This function creates and adds one print page to the internal cache of print pages
/// pages stored in printPages.
/// </summary>
/// <param name="lastRTBOAdded">Last RichTextBlockOverflow element added in the current content</param>
/// <param name="printPageDescription">Printer's page description</param>
protected RichTextBlockOverflow AddOnePrintPage(RichTextBlockOverflow lastRTBOAdded, PrintPageDescription printPageDescription)
{
// XAML element that is used to represent to "printing page"
FrameworkElement page;
// The link container for text overflowing in this page
RichTextBlockOverflow textLink;
// Check if this is the first page ( no previous RichTextBlockOverflow)
if (lastRTBOAdded == null)
{
// If this is the first page add the specific scenario content
page = firstPage;
//Hide footer since we don't know yet if it will be displayed (this might not be the last page) - wait for layout
StackPanel footer = (StackPanel)page.FindName("Footer");
footer.Visibility = Visibility.Collapsed;
}
else
{
// Flow content (text) from previous pages
page = new ContinuationPage(lastRTBOAdded);
}
// Set "paper" width
page.Width = printPageDescription.PageSize.Width;
page.Height = printPageDescription.PageSize.Height;
Grid printableArea = (Grid)page.FindName("PrintableArea");
// Get the margins size
// If the ImageableRect is smaller than the app provided margins use the ImageableRect
double marginWidth = Math.Max(printPageDescription.PageSize.Width - printPageDescription.ImageableRect.Width, printPageDescription.PageSize.Width * ApplicationContentMarginLeft * 2);
double marginHeight = Math.Max(printPageDescription.PageSize.Height - printPageDescription.ImageableRect.Height, printPageDescription.PageSize.Height * ApplicationContentMarginTop * 2);
// Set-up "printable area" on the "paper"
printableArea.Width = firstPage.Width - marginWidth;
printableArea.Height = firstPage.Height - marginHeight;
// Add the (newly created) page to the print canvas which is part of the visual tree and force it to go
// through layout so that the linked containers correctly distribute the content inside them.
PrintCanvas.Children.Add(page);
PrintCanvas.InvalidateMeasure();
PrintCanvas.UpdateLayout();
// Find the last text container and see if the content is overflowing
textLink = (RichTextBlockOverflow)page.FindName("ContinuationPageLinkedContainer");
// Check if this is the last page
if ((!textLink.HasOverflowContent) && (textLink.Visibility == Windows.UI.Xaml.Visibility.Visible))
{
StackPanel footer = (StackPanel)page.FindName("Footer");
footer.Visibility = Visibility.Visible;
}
// Add the page to the print page collection
printPages.Add(page);
return(textLink);
}
/// <summary>
/// This function creates and adds one print preview page to the internal cache of print preview
/// pages stored in printPreviewPages.
/// </summary>
/// <param name="lastRTBOAdded">Last RichTextBlockOverflow element added in the current content</param>
/// <param name="printPageDescription">Printer's page description</param>
protected virtual RichTextBlockOverflow AddOnePrintPreviewPage(RichTextBlockOverflow lastRTBOAdded, PrintPageDescription printPageDescription)
{
// XAML element that is used to represent to "printing page"
FrameworkElement page;
// The link container for text overflowing in this page
RichTextBlockOverflow textLink;
// Check if this is the first page ( no previous RichTextBlockOverflow)
if (lastRTBOAdded == null)
{
// If this is the first page add the specific scenario content
page = firstPage;
//Hide footer since we don't know yet if it will be displayed (this might not be the last page) - wait for layout
StackPanel footer = (StackPanel)page.FindName("Footer");
footer.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
}
else
{
// Flow content (text) from previous pages
page = new ContinuationPage(lastRTBOAdded);
}
// Set "paper" width
page.Width = printPageDescription.PageSize.Width;
page.Height = printPageDescription.PageSize.Height;
Grid printableArea = (Grid)page.FindName("PrintableArea");
// Get the margins size
// If the ImageableRect is smaller than the app provided margins use the ImageableRect
double marginWidth = Math.Max(printPageDescription.PageSize.Width - printPageDescription.ImageableRect.Width, printPageDescription.PageSize.Width * ApplicationContentMarginLeft * 2);
double marginHeight = Math.Max(printPageDescription.PageSize.Height - printPageDescription.ImageableRect.Height, printPageDescription.PageSize.Height * ApplicationContentMarginTop * 2);
// Set-up "printable area" on the "paper"
printableArea.Width = firstPage.Width - marginWidth;
printableArea.Height = firstPage.Height - marginHeight;
// Add the (newley created) page to the print canvas which is part of the visual tree and force it to go
// through layout so that the linked containers correctly distribute the content inside them.
PrintCanvas.Children.Add(page);
PrintCanvas.InvalidateMeasure();
PrintCanvas.UpdateLayout();
// Find the last text container and see if the content is overflowing
textLink = (RichTextBlockOverflow)page.FindName("ContinuationPageLinkedContainer");
// Check if this is the last page
if (!textLink.HasOverflowContent && textLink.Visibility == Windows.UI.Xaml.Visibility.Visible)
{
StackPanel footer = (StackPanel)page.FindName("Footer");
footer.Visibility = Windows.UI.Xaml.Visibility.Visible;
}
// Add the page to the page preview collection
printPreviewPages.Add(page);
return textLink;
}
