private async void PrintDetailedOptions_OptionChanged(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
{
var invalidatePreview = false;
switch (args.OptionId)
{
case "LayoutOption":
switch (sender.Options["LayoutOption"].Value as string)
{
case "Center":
this.printLayout = PrintPanel.LayoutOption.Centered;
break;
case "AlignLeftOrTop":
this.printLayout = PrintPanel.LayoutOption.AlignLeftOrTop;
break;
case "AlignRightOrBottom":
this.printLayout = PrintPanel.LayoutOption.AlignRightOrBottom;
break;
}
invalidatePreview = true;
break;
}
if (invalidatePreview)
{
await this.caller.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
this.printDocument.InvalidatePreview();
});
}
}
private void PrintTaskRequested(PrintManager sender, PrintTaskRequestedEventArgs e)
{
PrintTask printTask = null;
printTask = e.Request.CreatePrintTask(this.title, sourceRequested =>
{
sourceRequested.SetSource(this.printDocumentSource);
});
var printDetailedOptions = PrintTaskOptionDetails.GetFromPrintTaskOptions(printTask.Options);
var displayedOptions = printDetailedOptions.DisplayedOptions;
var alignOption = printDetailedOptions.CreateItemListOption("LayoutOption", "Layout Option");
alignOption.AddItem("Center", "Center");
alignOption.AddItem("AlignLeftOrTop", "Align to the Left or to the Top");
alignOption.AddItem("AlignRightOrBottom", "Align to the right or to the bottom");
this.printLayout = PrintPanel.LayoutOption.Centered;
displayedOptions.Clear();
displayedOptions.Add(StandardPrintTaskOptions.Copies);
displayedOptions.Add("LayoutOption");
displayedOptions.Add(StandardPrintTaskOptions.MediaSize);
displayedOptions.Add(StandardPrintTaskOptions.Orientation);
displayedOptions.Add(StandardPrintTaskOptions.ColorMode);
displayedOptions.Add(StandardPrintTaskOptions.PrintQuality);
printDetailedOptions.OptionChanged += this.PrintDetailedOptions_OptionChanged;
}
