/// <summary>
/// Option change event handler
/// </summary>
/// <param name="sender">The print task option details for which an option changed.</param>
/// <param name="args">The event arguments containing the id of the changed option.</param>
private async void PrintDetailedOptionsOptionChanged(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
{
bool invalidatePreview = false;
// For this scenario we are interested only when the 2 custom options change (photoSize & scaling) in order to trigger a preview refresh.
// Default options that change page aspect will trigger preview invalidation (refresh) automatically.
// It is safe to ignore verifying other options and(or) combinations here because during Paginate event(CreatePrintPreviewPages) we check if the PageDescription changed.
if (args.OptionId == null)
{
return;
}
string optionId = args.OptionId.ToString();
if (optionId == "photoSize")
{
IPrintOptionDetails photoSizeOption = sender.Options[optionId];
string photoSizeValue = photoSizeOption.Value as string;
if (!string.IsNullOrEmpty(photoSizeValue))
{
switch (photoSizeValue)
{
case "SizeFullPage":
photoSize = PhotoSize.SizeFullPage;
break;
case "Size4x6":
photoSize = PhotoSize.Size4x6;
break;
case "Size5x7":
photoSize = PhotoSize.Size5x7;
break;
case "Size8x10":
photoSize = PhotoSize.Size8x10;
break;
}
invalidatePreview = true;
}
}
if (optionId == "scaling")
{
IPrintOptionDetails scalingOption = sender.Options[optionId];
string scalingValue = scalingOption.Value as string;
if (!string.IsNullOrEmpty(scalingValue))
{
switch (scalingValue)
{
case "Crop":
photoScale = Scaling.Crop;
break;
case "ShrinkToFit":
photoScale = Scaling.ShrinkToFit;
break;
}
invalidatePreview = true;
}
}
// Invalidate preview if one of the 2 options (photoSize, scaling) changed.
if (invalidatePreview)
{
await scenarioPage.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, printDocument.InvalidatePreview);
}
}
/// <summary>
/// Option change event handler
/// </summary>
/// <param name="sender">PrintTaskOptionsDetails object</param>
/// <param name="args">the event arguments containing the changed option id</param>
async void printDetailedOptions_OptionChanged(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
{
if (args.OptionId == null)
{
return;
}
string optionId = args.OptionId.ToString();
// Handle change in Page Range Option
if (optionId == "PageRange")
{
IPrintOptionDetails pageRange = sender.Options[optionId];
string pageRangeValue = pageRange.Value.ToString();
selectionMode = false;
switch (pageRangeValue)
{
case "PrintRange":
// Add PageRangeEdit custom option to the option list
sender.DisplayedOptions.Add("PageRangeEdit");
pageRangeEditVisible = true;
await scenarioPage.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
ShowContent(null);
});
break;
case "PrintSelection":
await scenarioPage.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
//Scenario4PageRange page = (Scenario4PageRange)scenarioPage;
PacketMessaging.Views.FormsPage page = (Scenario4PageRange)scenarioPage;
PageToPrint pageContent = (PageToPrint)page.PrintFrame.Content;
ShowContent(pageContent.TextContentBlock.SelectedText);
});
RemovePageRangeEdit(sender);
break;
default:
await scenarioPage.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
ShowContent(null);
});
RemovePageRangeEdit(sender);
break;
}
Refresh();
}
else if (optionId == "PageRangeEdit")
{
IPrintOptionDetails pageRange = sender.Options[optionId];
// Expected range format (p1,p2...)*, (p3-p9)* ...
if (!Regex.IsMatch(pageRange.Value.ToString(), @"^\s*\d+\s*(\-\s*\d+\s*)?(\,\s*\d+\s*(\-\s*\d+\s*)?)*$"))
{
pageRange.ErrorText = "Invalid Page Range (eg: 1-3, 5)";
}
else
{
pageRange.ErrorText = string.Empty;
try
{
GetPagesInRange(pageRange.Value.ToString());
Refresh();
}
catch (InvalidPageException ipex)
{
pageRange.ErrorText = ipex.Message;
}
}
}
}
