protected override RichTextBlockOverflow AddOnePrintPreviewPage(RichTextBlockOverflow lastRTBOAdded, PrintPageDescription printPageDescription)
{
// Check if we need to hide/show text & images for this scenario
// Since all is rulled by the first page (page flow), here is where we must start
if (lastRTBOAdded == null)
{
// Get a refference to page objects
Grid pageContent = (Grid)firstPage.FindName("printableArea");
Image scenarioImage = (Image)firstPage.FindName("scenarioImage");
RichTextBlock mainText = (RichTextBlock)firstPage.FindName("textContent");
RichTextBlockOverflow firstLink = (RichTextBlockOverflow)firstPage.FindName("firstLinkedContainer");
RichTextBlockOverflow continuationLink = (RichTextBlockOverflow)firstPage.FindName("continuationPageLinkedContainer");
// Hide(collapse) and move elements in different grid cells depending by the viewable content(only text, only pictures)
scenarioImage.Visibility = ShowImage ? Windows.UI.Xaml.Visibility.Visible : Windows.UI.Xaml.Visibility.Collapsed;
firstLink.SetValue(Grid.ColumnSpanProperty, ShowImage ? 1 : 2);
scenarioImage.SetValue(Grid.RowProperty, ShowText ? 2 : 1);
scenarioImage.SetValue(Grid.ColumnProperty, ShowText ? 1 : 0);
pageContent.ColumnDefinitions[0].Width = new GridLength(ShowText ? 6 : 4, GridUnitType.Star);
pageContent.ColumnDefinitions[1].Width = new GridLength(ShowText ? 4 : 6, GridUnitType.Star);
// Break the text flow if the app is not printing text in order not to spawn pages with blank content
mainText.Visibility = ShowText ? Windows.UI.Xaml.Visibility.Visible : Windows.UI.Xaml.Visibility.Collapsed;
continuationLink.Visibility = ShowText ? Windows.UI.Xaml.Visibility.Visible : Windows.UI.Xaml.Visibility.Collapsed;
// Hide header if printing only images
StackPanel header = (StackPanel)firstPage.FindName("header");
header.Visibility = ShowText ? Windows.UI.Xaml.Visibility.Visible : Windows.UI.Xaml.Visibility.Collapsed;
}
//Continue with the rest of the base printing layout processing (paper size, printable page size)
return base.AddOnePrintPreviewPage(lastRTBOAdded, printPageDescription);
}
private RichTextBlockOverflow AddOnePrintPreviewPage(RichTextBlockOverflow lastRtboAdded, PrintPageDescription printPageDescription)
{
FrameworkElement page;
RichTextBlockOverflow link;
if (lastRtboAdded == null)
{
page = page1;
StackPanel footer = (StackPanel)page.FindName("footer");
footer.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
}
else
{
page = new ContinuationPage(lastRtboAdded);
}
page.Width = printPageDescription.PageSize.Width;
page.Height = printPageDescription.PageSize.Height;
Grid printableArea = (Grid)page.FindName("printableArea");
double marginWidth = Math.Max(printPageDescription.PageSize.Width - printPageDescription.ImageableRect.Width, printPageDescription.PageSize.Width * left * 2);
double marginHeight = Math.Max(printPageDescription.PageSize.Height - printPageDescription.ImageableRect.Height, printPageDescription.PageSize.Height * top * 2);
printableArea.Width = page1.Width - marginWidth;
printableArea.Height = page1.Height - marginHeight;
PrintContainer.Children.Add(page);
PrintContainer.InvalidateMeasure();
PrintContainer.UpdateLayout();
// Find the last text container and see if the content is overflowing
link = (RichTextBlockOverflow)page.FindName("continuationPageLinkedContainer");
// Check if this is the last page
if (!link.HasOverflowContent && link.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
pages.Add(page);
return link;
}
protected override RichTextBlockOverflow AddOnePrintPreviewPage(RichTextBlockOverflow lastRTBOAdded, PrintPageDescription printPageDescription)
{
RichTextBlockOverflow textLink = base.AddOnePrintPreviewPage(lastRTBOAdded, printPageDescription);
// Don't show footer in selection mode
if (selectionMode)
{
FrameworkElement page = (FrameworkElement)printPreviewPages[printPreviewPages.Count - 1];
StackPanel footer = (StackPanel)page.FindName("Footer");
footer.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
}
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>
private RichTextBlockOverflow AddOnePrintPreviewPage(RichTextBlockOverflow lastRTBOAdded,
PrintPageDescription printPageDescription)
{
// Create a cavase which represents the page
var page = new Canvas();
page.Width = printPageDescription.PageSize.Width;
page.Height = printPageDescription.PageSize.Height;
var pageState = new PageLoadState(page, printPreviewPages.Count);
pageState.ReadyAction = async (pageNumber, currentPage) =>
{
// Ignore if this is not the current page
if (Interlocked.CompareExchange(ref currentPreviewPage, currentPreviewPage, pageNumber) == pageNumber)
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
//await new Windows.UI.Popups.MessageDialog("Content loaded").ShowAsync();
printDocument.SetPreviewPage(pageNumber + 1, currentPage);
});
}
};
// Create a grid which contains the actual content to be printed
var content = new Grid();
// 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 content size based on the given margins
content.Width = printPageDescription.PageSize.Width - marginWidth;
content.Height = printPageDescription.PageSize.Height - marginHeight;
// Set content margins
content.SetValue(Canvas.LeftProperty, marginWidth/2);
content.SetValue(Canvas.TopProperty, marginHeight/2);
//// Add the RowDefinitions to the Grid which is a content to be printed
//RowDefinition rowDef = new RowDefinition();
//rowDef.Height = new GridLength(0.7, GridUnitType.Star);
//content.RowDefinitions.Add(rowDef);
//rowDef = new RowDefinition();
//rowDef.Height = new GridLength(0.8, GridUnitType.Star);
//content.RowDefinitions.Add(rowDef);
//rowDef = new RowDefinition();
//rowDef.Height = new GridLength(2.5, GridUnitType.Star);
//content.RowDefinitions.Add(rowDef);
//rowDef = new RowDefinition();
//rowDef.Height = new GridLength(3.5, GridUnitType.Star);
//content.RowDefinitions.Add(rowDef);
//rowDef = new RowDefinition();
//rowDef.Height = new GridLength(1.5, GridUnitType.Star);
//content.RowDefinitions.Add(rowDef);
//rowDef = new RowDefinition();
//rowDef.Height = new GridLength(0.5, GridUnitType.Star);
//content.RowDefinitions.Add(rowDef);
//rowDef = new RowDefinition();
//rowDef.Height = new GridLength(0.5, GridUnitType.Star);
//content.RowDefinitions.Add(rowDef);
// Add the ColumnDefinitions to the Grid which is a content to be printed
//ColumnDefinition colDef = new ColumnDefinition();
//colDef.Width = new GridLength(40, GridUnitType.Star);
//content.ColumnDefinitions.Add(colDef);
//colDef = new ColumnDefinition();
//colDef.Width = new GridLength(60, GridUnitType.Star);
//content.ColumnDefinitions.Add(colDef);
//// Create the "Windows 8 SDK Sample" header which consists of an image and text in a stack panel
//// and add it to the content grid
//Image windowsLogo = new Image();
//windowsLogo.Source = new BitmapImage(new Uri("ms-appx:///Images/windows-sdk.png"));
//pageState.ListenForCompletion((BitmapImage)windowsLogo.Source);
//TextBlock headerText = new TextBlock();
//headerText.TextWrapping = TextWrapping.Wrap;
//headerText.Text = "Windows 8 SDK Sample";
//headerText.FontSize = 20;
//headerText.Foreground = new SolidColorBrush(Colors.Black);
//StackPanel sp = new StackPanel();
//sp.Orientation = Orientation.Horizontal;
//sp.Children.Add(windowsLogo);
//sp.Children.Add(headerText);
//StackPanel outerPanel = new StackPanel();
//outerPanel.Orientation = Orientation.Vertical;
//outerPanel.VerticalAlignment = Windows.UI.Xaml.VerticalAlignment.Top;
//outerPanel.Children.Add(sp);
//outerPanel.SetValue(Grid.RowProperty, 1);
//outerPanel.SetValue(Grid.ColumnSpanProperty, 2);
//TextBlock sampleTitle = new TextBlock();
//sampleTitle.TextWrapping = TextWrapping.Wrap;
//sampleTitle.Text = "Print Sample";
//sampleTitle.FontSize = 22;
//sampleTitle.FontWeight = FontWeights.Bold;
//sampleTitle.Foreground = new SolidColorBrush(Colors.Black);
//outerPanel.Children.Add(sampleTitle);
//content.Children.Add(outerPanel);
//// Create Microsoft image used to end each page and add it to the content grid
//Image microsoftLogo = new Image();
//microsoftLogo.Source = new BitmapImage(new Uri("ms-appx:///Images/microsoft-sdk.png"));
//pageState.ListenForCompletion((BitmapImage)microsoftLogo.Source);
//microsoftLogo.HorizontalAlignment = Windows.UI.Xaml.HorizontalAlignment.Left;
//microsoftLogo.SetValue(Grid.RowProperty, 5);
//content.Children.Add(microsoftLogo);
//// Add the copywrite notice and add it to the content grid
//TextBlock copyrightNotice = new TextBlock();
//copyrightNotice.Text = "© 2011 Microsoft. All rights reserved.";
//copyrightNotice.FontSize = 16;
//copyrightNotice.TextWrapping = TextWrapping.Wrap;
//copyrightNotice.Foreground = new SolidColorBrush(Colors.Black);
//copyrightNotice.SetValue(Grid.RowProperty, 6);
//copyrightNotice.SetValue(Grid.ColumnSpanProperty, 2);
//content.Children.Add(copyrightNotice);
// If lastRTBOAdded is null then we know we are creating the first page.
bool isFirstPage = lastRTBOAdded == null;
FrameworkElement previousLTCOnPage = null;
var rtbo = new RichTextBlockOverflow();
// Create the linked containers and and add them to the content grid
if (isFirstPage)
{
// The first linked container in a chain of linked containers is is always a RichTextBlock
if (ShowText)
{
var rtbl = new RichTextBlock();
rtbl = AddContentToRTBl(rtbl);
content.Children.Add(rtbl);
// Save the RichTextBlock as the last linked container added to this page
previousLTCOnPage = rtbl;
}
//if (ShowImage)
//{
// // Add the image to the first page and add it to the content grid
// Image pic = new Image();
// BitmapImage bitmap = new BitmapImage(new Uri("ms-appx:///Images/print_1.png"));
// pageState.ListenForCompletion(bitmap);
// pic.Source = bitmap;
// pic.HorizontalAlignment = Windows.UI.Xaml.HorizontalAlignment.Left;
// pic.Margin = new Thickness(10);
// if (ShowText)
// {
// pic.SetValue(Grid.RowProperty, 3);
// pic.SetValue(Grid.ColumnProperty, 2);
// content.Children.Add(pic);
// content.RowDefinitions[2].Height = new GridLength(2.5, GridUnitType.Star);
// }
// else
// {
// pic.Width = content.Width;
// pic.Height = content.Height;
// page.Children.Add(pic);
// }
//}
}
else if (ShowText)
{
// This is not the first page so the first element on this page has to be a
// RichTextBoxOverflow that links to the last RichTextBlockOverflow added to
// the previous page.
rtbo = new RichTextBlockOverflow();
rtbo.SetValue(Grid.RowProperty, 2);
rtbo.SetValue(Grid.ColumnSpanProperty, 2);
content.Children.Add(rtbo);
// Keep text flowing from the previous page to this page by setting the linked text container just
// created (rtbo) as the OverflowContentTarget for the last linked text container from the previous page
lastRTBOAdded.OverflowContentTarget = rtbo;
// Save the RichTextBlockOverflow as the last linked container added to this page
previousLTCOnPage = rtbo;
}
//if (ShowText)
//{
// // Create the next linked text container for on this page.
// rtbo = new RichTextBlockOverflow();
// rtbo.SetValue(Grid.RowProperty, 3);
// // If this linked container is not on the first page make it span 2 columns.
// if (!isFirstPage || !ShowImage)
// rtbo.SetValue(Grid.ColumnSpanProperty, 2);
// // Add the RichTextBlockOverflow to the content to be printed.
// content.Children.Add(rtbo);
// // Add the new RichTextBlockOverflow to the chain of linked text containers. To do this we much check
// // to see if the previous container is a RichTextBlock or RichTextBlockOverflow.
// if (previousLTCOnPage is RichTextBlock)
// ((RichTextBlock)previousLTCOnPage).OverflowContentTarget = rtbo;
// else
// ((RichTextBlockOverflow)previousLTCOnPage).OverflowContentTarget = rtbo;
// // Save the last linked text container added to the chain
// previousLTCOnPage = rtbo;
// // Create the next linked text container for on this page.
// rtbo = new RichTextBlockOverflow();
// rtbo.SetValue(Grid.RowProperty, 4);
// rtbo.SetValue(Grid.ColumnSpanProperty, 2);
// content.Children.Add(rtbo);
// // Add the new RichTextBlockOverflow to the chain of linked text containers. We don't have to check
// // the type of the previous linked container this time because we know it's a RichTextBlockOverflow element
// ((RichTextBlockOverflow)previousLTCOnPage).OverflowContentTarget = rtbo;
//}
// We are done creating the content for this page. Add it to the Canvas which represents the page
page.Children.Add(content);
// Add the newley created page to the printing root 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.
PrintingRoot.Children.Add(page);
PrintingRoot.InvalidateMeasure();
PrintingRoot.UpdateLayout();
// Add the newley created page to the list of pages
printPreviewPages.Add(pageState);
// Return the last linked container added to the page
return rtbo;
}
/// <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;
RichTextBlockOverflow textLink;
page = firstPage;
// 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 printing root 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.
PrintingRoot.Children.Add(page);
PrintingRoot.InvalidateMeasure();
PrintingRoot.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;
}
/// <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>
private 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;
}
else
{
// Flow content (text) from previous pages
page = new PrintPage(lastRTBOAdded);
// Remove the duplicate OverflowContentTarget.
((RichTextBlock)page.FindName("textContent")).OverflowContentTarget = null;
}
// 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 * HorizontalPrintMargin * 2);
double marginHeight = Math.Max(printPageDescription.PageSize.Height - printPageDescription.ImageableRect.Height, printPageDescription.PageSize.Height * VerticalPrintMargin * 2);
// Set-up "printable area" on the "paper"
printableArea.Width = page.Width - marginWidth;
printableArea.Height = page.Height - marginHeight;
// Add the (newly created) page to the printing root 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.
PrintingRoot.Children.Add(page);
PrintingRoot.InvalidateMeasure();
PrintingRoot.UpdateLayout();
// Find the last text container and see if the content is overflowing
textLink = (RichTextBlockOverflow)page.FindName("continuationPageLinkedContainer");
// Add page number
this.pageNumber += 1;
TextBlock pageNumberTextBlock = (TextBlock)page.FindName("pageNumber");
if (pageNumberTextBlock != null)
{
pageNumberTextBlock.Text = string.Format("- {0} -", this.pageNumber);
}
// Add the page to the page preview collection
printPreviewPages.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>
private RichTextBlockOverflow AddOnePrintPreviewPage(RichTextBlockOverflow lastRTBOAdded, PrintPageDescription printPageDescription)
{
// Create a cavase which represents the page
Canvas page = new Canvas();
page.Width = printPageDescription.PageSize.Width;
page.Height = printPageDescription.PageSize.Height;
PageLoadState pageState = new PageLoadState(page, printPreviewPages.Count);
pageState.ReadyAction = async (pageNumber, currentPage) =>
{
// Ignore if this is not the current page
if (Interlocked.CompareExchange(ref currentPreviewPage, currentPreviewPage, pageNumber) == pageNumber)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
//await new Windows.UI.Popups.MessageDialog("Content loaded").ShowAsync();
printDocument.SetPreviewPage(pageNumber + 1, currentPage);
});
}
};
// Create a grid which contains the actual content to be printed
Grid content = new Grid();
// 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 content size based on the given margins
content.Width = printPageDescription.PageSize.Width - marginWidth;
content.Height = printPageDescription.PageSize.Height - marginHeight;
// Set content margins
content.SetValue(Canvas.LeftProperty, marginWidth / 2);
content.SetValue(Canvas.TopProperty, marginHeight / 2);
// If lastRTBOAdded is null then we know we are creating the first page.
bool isFirstPage = lastRTBOAdded == null;
FrameworkElement previousLTCOnPage = null;
RichTextBlockOverflow rtbo = new RichTextBlockOverflow();
// Create the linked containers and and add them to the content grid
if (isFirstPage)
{
// The first linked container in a chain of linked containers is is always a RichTextBlock
if (ShowText)
{
RichTextBlock rtbl = new RichTextBlock();
rtbl = AddContentToRTBl(rtbl);
content.Children.Add(rtbl);
// Save the RichTextBlock as the last linked container added to this page
previousLTCOnPage = rtbl;
}
}
else if (ShowText)
{
// This is not the first page so the first element on this page has to be a
// RichTextBoxOverflow that links to the last RichTextBlockOverflow added to
// the previous page.
rtbo = new RichTextBlockOverflow();
rtbo.SetValue(Grid.RowProperty, 2);
rtbo.SetValue(Grid.ColumnSpanProperty, 2);
content.Children.Add(rtbo);
// Keep text flowing from the previous page to this page by setting the linked text container just
// created (rtbo) as the OverflowContentTarget for the last linked text container from the previous page
lastRTBOAdded.OverflowContentTarget = rtbo;
// Save the RichTextBlockOverflow as the last linked container added to this page
previousLTCOnPage = rtbo;
}
// We are done creating the content for this page. Add it to the Canvas which represents the page
page.Children.Add(content);
// Add the newley created page to the printing root 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.
PrintingRoot.Children.Add(page);
PrintingRoot.InvalidateMeasure();
PrintingRoot.UpdateLayout();
// Add the newley created page to the list of pages
printPreviewPages.Add(pageState);
// Return the last linked container added to the page
return rtbo;
}
/// <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;
}
// 向 previewPages 添加一个预览页，以及向 printingRoot 添加一个打印内容，同时返回本页所对应的下一页的 RichTextBlockOverflow
private RichTextBlockOverflow AddPreviewPageAndPrintPage(RichTextBlockOverflow lastRichText, PrintPageDescription printPageDescription)
{
// 需要添加到 previewPages 的预览页
FrameworkElement previewPage;
// 添加到 previewPages 的打印页所对应的下一页的 RichTextBlockOverflow
RichTextBlockOverflow textOverflow;
if (lastRichText == null) // 第一页
{
previewPage = printPage;
StackPanel footer = (StackPanel)previewPage.FindName("footer"); // 第一页不显示页脚
footer.Visibility = Visibility.Collapsed;
}
else // 非第一页
{
previewPage = new ContinuationPage(lastRichText);
}
// 打印页的宽和高
previewPage.Width = printPageDescription.PageSize.Width;
previewPage.Height = printPageDescription.PageSize.Height;
// 打印页的页边距
Grid printableArea = (Grid)previewPage.FindName("printableArea");
double applicationContentMarginLeft = 0.075; // 页的左右边距，即左右边距加在一起占 15% 的空间
double applicationContentMarginTop = 0.03; // 页的上下边距，即上下边距加在一起占 6% 的空间
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);
// 打印区域的宽和高
printableArea.Width = printPage.Width - marginWidth;
printableArea.Height = printPage.Height - marginHeight;
// 向 printingRoot 添加一个打印内容，以便发送到打印机打印
printingRoot.Children.Add(previewPage);
printingRoot.InvalidateMeasure();
printingRoot.UpdateLayout();
// 获取本页所对应的下一页的 RichTextBlockOverflow
textOverflow = (RichTextBlockOverflow)previewPage.FindName("textOverflow");
if (!textOverflow.HasOverflowContent && textOverflow.Visibility == Visibility.Visible)
{
StackPanel footer = (StackPanel)previewPage.FindName("footer"); // 最后一页才显示页脚
footer.Visibility = Windows.UI.Xaml.Visibility.Visible;
}
// 向 previewPages 添加新页
previewPages.Add(previewPage);
return textOverflow;
}
//This method does all of the heavy lifting for us, calculating the size of the page,
//setting margins, and saving them to the pages List<>.
private RichTextBlockOverflow AddOnePrintPreviewPage(RichTextBlockOverflow lastRTBOAdded, PrintPageDescription printPageDescription)
{
//This method does all of the heavy lifting for us, calculating the size of the
//page, setting margins, and saving them to the pages List<>.
FrameworkElement page;
RichTextBlockOverflow link;
if (lastRTBOAdded == null)
{
page = page1;
}
else
{
page = new ContinuesPage(lastRTBOAdded);
}
page.Width = printPageDescription.PageSize.Width;
page.Height = printPageDescription.PageSize.Height;
Grid printableArea = (Grid)page.FindName("printableArea");
double marginWidth = Math.Max(printPageDescription.PageSize.Width - printPageDescription.ImageableRect.Width, printPageDescription.PageSize.Width * left * 2);
double marginHeight = Math.Max(printPageDescription.PageSize.Height - printPageDescription.ImageableRect.Height, printPageDescription.PageSize.Height * top * 2);
printableArea.Width = page1.Width - marginWidth;
printableArea.Height = page1.Height - marginHeight;
PrintContainer.Children.Add(page);
PrintContainer.InvalidateMeasure();
PrintContainer.UpdateLayout();
// Find the last text container and see if the content is overflowing
link = (RichTextBlockOverflow)page.FindName("continuationPageLinkedContainer");
// Add the page to the page preview collection
pages.Add(page);
return link;
}
