private async void OnPrintClicked(object sender, RoutedEventArgs e)
{
// Create a new CanvasPrintDocument
if (printDocument != null)
{
printDocument.Dispose();
}
printDocument = new CanvasPrintDocument();
printDocument.PrintTaskOptionsChanged += PrintDocument_PrintTaskOptionsChanged;
printDocument.Preview += PrintDocument_Preview;
printDocument.Print += PrintDocument_Print;
// Show the print UI, with the print manager connected to us
var printManager = PrintManager.GetForCurrentView();
printManager.PrintTaskRequested += PrintingExample_PrintTaskRequested;
try
{
await PrintManager.ShowPrintUIAsync();
}
finally
{
printManager.PrintTaskRequested -= PrintingExample_PrintTaskRequested;
}
}
private void PrintDocument_Print(CanvasPrintDocument sender, CanvasPrintEventArgs args)
{
var detailedOptions = PrintTaskOptionDetails.GetFromPrintTaskOptions(args.PrintTaskOptions);
var pageRange = detailedOptions.Options["PageRange"].Value.ToString();
int pageCountToPrint;
if (pageRange == "PrintFirstPage")
{
pageCountToPrint = 1;
}
else
{
pageCountToPrint = pageCount;
}
for (uint i = 1; i <= pageCountToPrint; ++i)
{
using (var ds = args.CreateDrawingSession())
{
var imageableRect = args.PrintTaskOptions.GetPageDescription(i).ImageableRect;
DrawPage(sender, ds, i, imageableRect);
}
}
}
private async Task EnsureBitmapsLoaded(CanvasPrintDocument sender)
{
if (bitmaps != null)
{
return;
}
bitmaps = new List <BitmapInfo>();
// For this demo we use example gallery's thumbnails (since that's a convenient source of images for the demo)
var thumbnailsFolder = await Package.Current.InstalledLocation.GetFolderAsync("Thumbnails");
var files = await thumbnailsFolder.GetFilesAsync();
foreach (var file in files)
{
if (file.Name.EndsWith("png"))
{
var bitmap = await CanvasBitmap.LoadAsync(sender, await file.OpenReadAsync());
bitmaps.Add(new BitmapInfo
{
Name = file.DisplayName,
Bitmap = bitmap
});
}
}
largestBitmap = Vector2.Zero;
foreach (var bitmap in bitmaps)
{
largestBitmap.X = Math.Max(largestBitmap.X, (float)bitmap.Bitmap.Size.Width);
largestBitmap.Y = Math.Max(largestBitmap.Y, (float)bitmap.Bitmap.Size.Height);
}
}
private void UserControl_Unloaded(object sender, RoutedEventArgs e)
{
if (printDocument != null)
{
printDocument.Dispose();
printDocument = null;
}
}
private void UserControl_Unloaded(object sender, RoutedEventArgs e)
{
if (printDocument != null)
{
printDocument.Dispose();
printDocument = null;
}
}
private void PrintDocument_Preview(CanvasPrintDocument sender, CanvasPreviewEventArgs args)
{
var ds = args.DrawingSession;
var pageNumber = args.PageNumber;
var imageableRect = args.PrintTaskOptions.GetPageDescription(args.PageNumber).ImageableRect;
DrawPage(sender, ds, pageNumber, imageableRect);
}
public static IPrintDocumentSource Print(Win2DScene scene, float padding)
{
Guard.NotNull(scene, nameof(scene));
Guard.GreaterThan(padding, 0, nameof(padding));
var printDocument = new CanvasPrintDocument();
var sceneBounds = scene.RenderBounds;
Action <CanvasDrawingSession, PrintPageDescription> renderForPrint = (session, page) =>
{
session.Clear(Colors.White);
var size = page.PageSize.ToVector2();
var ratio = sceneBounds.Width / sceneBounds.Height;
var targetSizeX = Math.Min(size.X - (2 * padding), sceneBounds.Width);
var targetSizeY = targetSizeX / ratio;
if (targetSizeY > page.PageSize.Height)
{
targetSizeY = Math.Min(size.Y - (2 * padding), sceneBounds.Height);
targetSizeX = targetSizeY * ratio;
}
var zoom = targetSizeX / sceneBounds.Width;
session.Transform =
Matrix3x2.CreateTranslation(
-sceneBounds.Position.X,
-sceneBounds.Position.Y) *
Matrix3x2.CreateScale(zoom) *
Matrix3x2.CreateTranslation(
0.5f * (size.X - targetSizeX),
0.5f * (size.Y - targetSizeY));
scene.Render(session, false, Rect2.Infinite);
};
printDocument.Preview += (sender, args) =>
{
sender.SetPageCount(1);
renderForPrint(args.DrawingSession, args.PrintTaskOptions.GetPageDescription(1));
};
printDocument.Print += (sender, args) =>
{
using (var session = args.CreateDrawingSession())
{
renderForPrint(session, args.PrintTaskOptions.GetPageDescription(1));
}
};
return(printDocument);
}
private void PrintDocument_Preview(CanvasPrintDocument sender, CanvasPreviewEventArgs args)
{
PrintTaskOptions options = args.PrintTaskOptions;
PrintTaskOptionDetails printDetailedOptions = PrintTaskOptionDetails.GetFromPrintTaskOptions(options);
Rect imageableRect = GetImageableRect(options, args.PageNumber);
GraphSize size = GetOptionValue <GraphSize>(printDetailedOptions);
LabelLocation labelLocation = GetOptionValue <LabelLocation>(printDetailedOptions);
DrawPage(args.DrawingSession, imageableRect, size, labelLocation);
}
private async void PrintDocument_PrintTaskOptionsChanged(CanvasPrintDocument sender, CanvasPrintTaskOptionsChangedEventArgs args)
{
var deferral = args.GetDeferral();
try
{
await EnsureBitmapsLoaded(sender);
var pageDesc = args.PrintTaskOptions.GetPageDescription(1);
var newPageSize = pageDesc.PageSize.ToVector2();
if (pageSize == newPageSize && pageCount != -1)
{
// We've already figured out the pages and the page size hasn't changed, so there's nothing left for us to do here.
return;
}
pageSize = newPageSize;
sender.InvalidatePreview();
// Figure out the bitmap index at the top of the current preview page. We'll request that the preview defaults to showing
// the page that still has this bitmap on it in the new layout.
int indexOnCurrentPage = 0;
if (pageCount != -1)
{
indexOnCurrentPage = (int)(args.CurrentPreviewPageNumber - 1) * bitmapsPerPage;
}
// Calculate the new layout
var printablePageSize = pageSize * 0.9f;
cellSize = largestBitmap + imagePadding;
var cellsPerPage = printablePageSize / cellSize;
columns = Math.Max(1, (int)Math.Floor(cellsPerPage.X));
rows = Math.Max(1, (int)Math.Floor(cellsPerPage.Y));
bitmapsPerPage = columns * rows;
// Calculate the page count
bitmapCount = bitmaps.Count;
pageCount = (int)Math.Ceiling(bitmapCount / (double)bitmapsPerPage);
sender.SetPageCount((uint)pageCount);
// Set the preview page to the one that has the item that was currently displayed in the last preview
args.NewPreviewPageNumber = (uint)(indexOnCurrentPage / bitmapsPerPage) + 1;
}
finally
{
deferral.Complete();
}
}
private void InitializePrinting()
{
// create new printer settings
printerSettings = new PrinterSettings();
// create new page settings
pageSettings = new PageSettings(printerSettings);
// create new canvas print document
printDocument = new CanvasPrintDocument
{
PrinterSettings = printerSettings,
DefaultPageSettings = pageSettings,
};
}
private void PrintDocument_Print(CanvasPrintDocument sender, CanvasPrintEventArgs args)
{
PrintTaskOptions options = args.PrintTaskOptions;
PrintTaskOptionDetails printDetailedOptions = PrintTaskOptionDetails.GetFromPrintTaskOptions(options);
Rect imageableRect = GetImageableRect(options, pageNumber: 1);
GraphSize size = GetOptionValue <GraphSize>(printDetailedOptions);
LabelLocation labelLocation = GetOptionValue <LabelLocation>(printDetailedOptions);
using (CanvasDrawingSession drawingSession = args.CreateDrawingSession())
{
DrawPage(drawingSession, imageableRect, size, labelLocation);
}
}
private void InitializePrinting()
{
printDialog = new PrintDialog()
{
PageRangeSelection = PageRangeSelection.AllPages, UserPageRangeEnabled = false
};
// create new canvas print document
printDocument = new CanvasPrintDocument()
{
AddOverlay = true
};
}
private void PrintDocument_PrintTaskOptionsChanged(CanvasPrintDocument sender, CanvasPrintTaskOptionsChangedEventArgs args)
{
PrintPageDescription pageDesc = args.PrintTaskOptions.GetPageDescription(1);
Vector2 newPageSize = pageDesc.PageSize.ToVector2();
if (_pageSize == newPageSize)
{
// We've already figured out the pages and the page size hasn't changed,
// so there's nothing left for us to do here.
return;
}
_pageSize = newPageSize;
sender.InvalidatePreview();
sender.SetPageCount(1);
args.NewPreviewPageNumber = 1;
}
private GraphPrinter(FunctionGraph graph)
{
_graph = graph;
// Resources cannot be loaded from the print thread, so do it here.
_title = AppUtilities.GetString("PrintTaskTitle");
_graphSizeOption = AppUtilities.GetString(nameof(GraphSize));
_fullPageItem = AppUtilities.GetString(nameof(GraphSize.FullPage));
_windowSizeItem = AppUtilities.GetString(nameof(GraphSize.Window));
_labelLocationOption = AppUtilities.GetString(nameof(LabelLocation));
_noneItem = AppUtilities.GetString(nameof(LabelLocation.None));
_topLeftItem = AppUtilities.GetString(nameof(LabelLocation.TopLeft));
_topRightItem = AppUtilities.GetString(nameof(LabelLocation.TopRight));
_bottomLeftItem = AppUtilities.GetString(nameof(LabelLocation.BottomLeft));
_bottomRightItem = AppUtilities.GetString(nameof(LabelLocation.BottomRight));
_printDocument = new CanvasPrintDocument();
_printDocument.Preview += PrintDocument_Preview;
_printDocument.Print += PrintDocument_Print;
_printDocument.PrintTaskOptionsChanged += PrintDocument_PrintTaskOptionsChanged;
}
private async void OnPrintClicked(object sender, RoutedEventArgs e)
{
// Create a new CanvasPrintDocument
if (printDocument != null)
{
printDocument.Dispose();
}
printDocument = new CanvasPrintDocument();
printDocument.PrintTaskOptionsChanged += PrintDocument_PrintTaskOptionsChanged;
printDocument.Preview += PrintDocument_Preview;
printDocument.Print += PrintDocument_Print;
// Show the print UI, with the print manager connected to us
var printManager = PrintManager.GetForCurrentView();
printManager.PrintTaskRequested += PrintingExample_PrintTaskRequested;
try
{
await PrintManager.ShowPrintUIAsync();
}
finally
{
printManager.PrintTaskRequested -= PrintingExample_PrintTaskRequested;
}
}
private void DrawPage(CanvasPrintDocument sender, CanvasDrawingSession ds, uint pageNumber, Rect imageableRect)
{
var cellAcross = new Vector2(cellSize.X, 0);
var cellDown = new Vector2(0, cellSize.Y);
var totalSize = cellAcross * columns + cellDown * rows;
Vector2 topLeft = (pageSize - totalSize) / 2;
int bitmapIndex = ((int)pageNumber - 1) * bitmapsPerPage;
var labelFormat = new CanvasTextFormat()
{
FontFamily = "Comic Sans MS",
FontSize = 12,
VerticalAlignment = CanvasVerticalAlignment.Bottom,
HorizontalAlignment = CanvasHorizontalAlignment.Left
};
var numberFormat = new CanvasTextFormat()
{
FontFamily = "Comic Sans MS",
FontSize = 18,
VerticalAlignment = CanvasVerticalAlignment.Top,
HorizontalAlignment = CanvasHorizontalAlignment.Left
};
var pageNumberFormat = new CanvasTextFormat()
{
FontFamily = "Comic Sans MS",
FontSize = 10,
VerticalAlignment = CanvasVerticalAlignment.Bottom,
HorizontalAlignment = CanvasHorizontalAlignment.Center
};
var titleFormat = new CanvasTextFormat()
{
FontFamily = "Comic Sans MS",
FontSize = 24,
VerticalAlignment = CanvasVerticalAlignment.Top,
HorizontalAlignment = CanvasHorizontalAlignment.Left
};
if (pageNumber == 1)
{
ds.DrawText("Win2D Printing Example", imageableRect, Colors.Black, titleFormat);
}
ds.DrawText(string.Format("Page {0} / {1}", pageNumber, pageCount),
imageableRect,
Colors.Black,
pageNumberFormat);
DrawGrid(ds, cellAcross, cellDown, topLeft);
for (int row = 0; row < rows; ++row)
{
for (int column = 0; column < columns; ++column)
{
var cellTopLeft = topLeft + (cellAcross * column) + (cellDown * row);
var paddedTopLeft = cellTopLeft + textPadding / 2;
var paddedSize = cellSize - textPadding;
var bitmapInfo = bitmaps[bitmapIndex % bitmaps.Count];
// Center the bitmap in the cell
var bitmapPos = cellTopLeft + (cellSize - bitmapInfo.Bitmap.Size.ToVector2()) / 2;
ds.DrawImage(bitmapInfo.Bitmap, bitmapPos);
using (var labelLayout = new CanvasTextLayout(sender, bitmapInfo.Name, labelFormat, paddedSize.X, paddedSize.Y))
using (var numberLayout = new CanvasTextLayout(sender, (bitmapIndex + 1).ToString(), numberFormat, paddedSize.X, paddedSize.Y))
{
DrawTextOverWhiteRectangle(ds, paddedTopLeft, labelLayout);
DrawTextOverWhiteRectangle(ds, paddedTopLeft, numberLayout);
}
bitmapIndex++;
}
}
}
private void DrawPage(CanvasPrintDocument sender, CanvasDrawingSession ds, uint pageNumber, Rect imageableRect)
{
var cellAcross = new Vector2(cellSize.X, 0);
var cellDown = new Vector2(0, cellSize.Y);
var totalSize = cellAcross * columns + cellDown * rows;
Vector2 topLeft = (pageSize - totalSize) / 2;
int bitmapIndex = ((int)pageNumber - 1) * bitmapsPerPage;
var labelFormat = new CanvasTextFormat()
{
FontFamily = "Comic Sans MS",
FontSize = 12,
VerticalAlignment = CanvasVerticalAlignment.Bottom,
HorizontalAlignment = CanvasHorizontalAlignment.Left
};
var numberFormat = new CanvasTextFormat()
{
FontFamily = "Comic Sans MS",
FontSize = 18,
VerticalAlignment = CanvasVerticalAlignment.Top,
HorizontalAlignment = CanvasHorizontalAlignment.Left
};
var pageNumberFormat = new CanvasTextFormat()
{
FontFamily = "Comic Sans MS",
FontSize = 10,
VerticalAlignment = CanvasVerticalAlignment.Bottom,
HorizontalAlignment = CanvasHorizontalAlignment.Center
};
var titleFormat = new CanvasTextFormat()
{
FontFamily = "Comic Sans MS",
FontSize = 24,
VerticalAlignment = CanvasVerticalAlignment.Top,
HorizontalAlignment = CanvasHorizontalAlignment.Left
};
if (pageNumber == 1)
ds.DrawText("Win2D Printing Example", imageableRect, Colors.Black, titleFormat);
ds.DrawText(string.Format("Page {0} / {1}", pageNumber, pageCount),
imageableRect,
Colors.Black,
pageNumberFormat);
DrawGrid(ds, cellAcross, cellDown, topLeft);
for (int row = 0; row < rows; ++row)
{
for (int column = 0; column < columns; ++column)
{
var cellTopLeft = topLeft + (cellAcross * column) + (cellDown * row);
var paddedTopLeft = cellTopLeft + textPadding / 2;
var paddedSize = cellSize - textPadding;
var bitmapInfo = bitmaps[bitmapIndex % bitmaps.Count];
// Center the bitmap in the cell
var bitmapPos = cellTopLeft + (cellSize - bitmapInfo.Bitmap.Size.ToVector2()) / 2;
ds.DrawImage(bitmapInfo.Bitmap, bitmapPos);
using (var labelLayout = new CanvasTextLayout(sender, bitmapInfo.Name, labelFormat, paddedSize.X, paddedSize.Y))
using (var numberLayout = new CanvasTextLayout(sender, (bitmapIndex + 1).ToString(), numberFormat, paddedSize.X, paddedSize.Y))
{
DrawTextOverWhiteRectangle(ds, paddedTopLeft, labelLayout);
DrawTextOverWhiteRectangle(ds, paddedTopLeft, numberLayout);
}
bitmapIndex++;
}
}
}
private void PrintDocument_Print(CanvasPrintDocument sender, CanvasPrintEventArgs args)
{
var detailedOptions = PrintTaskOptionDetails.GetFromPrintTaskOptions(args.PrintTaskOptions);
var pageRange = detailedOptions.Options["PageRange"].Value.ToString();
int pageCountToPrint;
if (pageRange == "PrintFirstPage")
pageCountToPrint = 1;
else
pageCountToPrint = pageCount;
for (uint i = 1; i <= pageCountToPrint; ++i)
{
using (var ds = args.CreateDrawingSession())
{
var imageableRect = args.PrintTaskOptions.GetPageDescription(i).ImageableRect;
DrawPage(sender, ds, i, imageableRect);
}
}
}
private void PrintDocument_Preview(CanvasPrintDocument sender, CanvasPreviewEventArgs args)
{
var ds = args.DrawingSession;
var pageNumber = args.PageNumber;
var imageableRect = args.PrintTaskOptions.GetPageDescription(args.PageNumber).ImageableRect;
DrawPage(sender, ds, pageNumber, imageableRect);
}
private async Task EnsureBitmapsLoaded(CanvasPrintDocument sender)
{
if (bitmaps != null)
return;
bitmaps = new List<BitmapInfo>();
// For this demo we use example gallery's thumbnails (since that's a convenient source of images for the demo)
var thumbnailsFolder = await Package.Current.InstalledLocation.GetFolderAsync("Thumbnails");
var files = await thumbnailsFolder.GetFilesAsync();
foreach (var file in files)
{
if (file.Name.EndsWith("png"))
{
var bitmap = await CanvasBitmap.LoadAsync(sender, await file.OpenReadAsync());
bitmaps.Add(new BitmapInfo
{
Name = file.DisplayName,
Bitmap = bitmap
});
}
}
largestBitmap = Vector2.Zero;
foreach (var bitmap in bitmaps)
{
largestBitmap.X = Math.Max(largestBitmap.X, (float)bitmap.Bitmap.Size.Width);
largestBitmap.Y = Math.Max(largestBitmap.Y, (float)bitmap.Bitmap.Size.Height);
}
}
private async void PrintDocument_PrintTaskOptionsChanged(CanvasPrintDocument sender, CanvasPrintTaskOptionsChangedEventArgs args)
{
var deferral = args.GetDeferral();
try
{
await EnsureBitmapsLoaded(sender);
var pageDesc = args.PrintTaskOptions.GetPageDescription(1);
var newPageSize = pageDesc.PageSize.ToVector2();
if (pageSize == newPageSize && pageCount != -1)
{
// We've already figured out the pages and the page size hasn't changed, so there's nothing left for us to do here.
return;
}
pageSize = newPageSize;
sender.InvalidatePreview();
// Figure out the bitmap index at the top of the current preview page. We'll request that the preview defaults to showing
// the page that still has this bitmap on it in the new layout.
int indexOnCurrentPage = 0;
if (pageCount != -1)
{
indexOnCurrentPage = (int)(args.CurrentPreviewPageNumber - 1) * bitmapsPerPage;
}
// Calculate the new layout
var printablePageSize = pageSize * 0.9f;
cellSize = largestBitmap + imagePadding;
var cellsPerPage = printablePageSize / cellSize;
columns = Math.Max(1, (int)Math.Floor(cellsPerPage.X));
rows = Math.Max(1, (int)Math.Floor(cellsPerPage.Y));
bitmapsPerPage = columns * rows;
// Calculate the page count
bitmapCount = bitmaps.Count;
pageCount = (int)Math.Ceiling(bitmapCount / (double)bitmapsPerPage);
sender.SetPageCount((uint)pageCount);
// Set the preview page to the one that has the item that was currently displayed in the last preview
args.NewPreviewPageNumber = (uint)(indexOnCurrentPage / bitmapsPerPage) + 1;
}
finally
{
deferral.Complete();
}
}
