/// <summary>
/// Initializes a new instance of the <see cref="PrintHelper"/> class.
/// </summary>
/// <param name="canvasContainer">XAML panel used to attach printing canvas. Can be hidden in your UI with Opacity = 0 for instance</param>
/// <param name="defaultPrintHelperOptions">Default settings for the print tasks</param>
public PrintHelper(Panel canvasContainer, PrintHelperOptions defaultPrintHelperOptions = null)
{
_printPreviewPages = new List <FrameworkElement>();
_printCanvas = new Canvas
{
Opacity = 0
};
_canvasContainer = canvasContainer ?? throw new ArgumentNullException();
_canvasContainer.RequestedTheme = ElementTheme.Light;
_elementsToPrint = new List <FrameworkElement>();
_defaultPrintHelperOptions = defaultPrintHelperOptions ?? new PrintHelperOptions();
RegisterForPrinting();
}
/// <summary>
/// Initializes a new instance of the <see cref="PrintHelper"/> class.
/// </summary>
/// <param name="canvasContainer">XAML panel used to attach printing canvas. Can be hidden in your UI with Opacity = 0 for instance</param>
/// <param name="defaultPrintHelperOptions">Default settings for the print tasks</param>
/// <param name="dispatcherQueue">The DispatcherQueue that should be used to dispatch UI updates, or null if this is being called from the UI thread.</param>
public PrintHelper(Panel canvasContainer, PrintHelperOptions defaultPrintHelperOptions = null, DispatcherQueue dispatcherQueue = null)
{
DispatcherQueue = dispatcherQueue ?? DispatcherQueue.GetForCurrentThread();
if (canvasContainer == null)
{
throw new ArgumentNullException();
}
_printPreviewPages = new List <FrameworkElement>();
_printCanvas = new Canvas();
_printCanvas.Opacity = 0;
_canvasContainer = canvasContainer;
_canvasContainer.RequestedTheme = ElementTheme.Light;
_elementsToPrint = new List <FrameworkElement>();
_defaultPrintHelperOptions = defaultPrintHelperOptions ?? new PrintHelperOptions();
RegisterForPrinting();
}
private void ApplyPrintSettings(PrintTask printTask)
{
_printHelperOptions = _printHelperOptions ?? _defaultPrintHelperOptions;
IEnumerable <string> displayedOptionsToAdd = _printHelperOptions.DisplayedOptions;
if (!_printHelperOptions.ExtendDisplayedOptions)
{
printTask.Options.DisplayedOptions.Clear();
}
foreach (var displayedOption in displayedOptionsToAdd)
{
if (!printTask.Options.DisplayedOptions.Contains(displayedOption))
{
printTask.Options.DisplayedOptions.Add(displayedOption);
}
}
if (printTask.Options.Binding != PrintBinding.NotAvailable)
{
printTask.Options.Binding = _printHelperOptions.Binding == PrintBinding.Default ? printTask.Options.Binding : _printHelperOptions.Binding;
}
if (printTask.Options.Bordering != PrintBordering.NotAvailable)
{
printTask.Options.Bordering = _printHelperOptions.Bordering == PrintBordering.Default ? printTask.Options.Bordering : _printHelperOptions.Bordering;
}
if (printTask.Options.MediaType != PrintMediaType.NotAvailable)
{
printTask.Options.MediaType = _printHelperOptions.MediaType == PrintMediaType.Default ? printTask.Options.MediaType : _printHelperOptions.MediaType;
}
if (printTask.Options.MediaSize != PrintMediaSize.NotAvailable)
{
printTask.Options.MediaSize = _printHelperOptions.MediaSize == PrintMediaSize.Default ? printTask.Options.MediaSize : _printHelperOptions.MediaSize;
}
if (printTask.Options.HolePunch != PrintHolePunch.NotAvailable)
{
printTask.Options.HolePunch = _printHelperOptions.HolePunch == PrintHolePunch.Default ? printTask.Options.HolePunch : _printHelperOptions.HolePunch;
}
if (printTask.Options.Duplex != PrintDuplex.NotAvailable)
{
printTask.Options.Duplex = _printHelperOptions.Duplex == PrintDuplex.Default ? printTask.Options.Duplex : _printHelperOptions.Duplex;
}
if (printTask.Options.ColorMode != PrintColorMode.NotAvailable)
{
printTask.Options.ColorMode = _printHelperOptions.ColorMode == PrintColorMode.Default ? printTask.Options.ColorMode : _printHelperOptions.ColorMode;
}
if (printTask.Options.Collation != PrintCollation.NotAvailable)
{
printTask.Options.Collation = _printHelperOptions.Collation == PrintCollation.Default ? printTask.Options.Collation : _printHelperOptions.Collation;
}
if (printTask.Options.PrintQuality != PrintQuality.NotAvailable)
{
printTask.Options.PrintQuality = _printHelperOptions.PrintQuality == PrintQuality.Default ? printTask.Options.PrintQuality : _printHelperOptions.PrintQuality;
}
if (printTask.Options.Staple != PrintStaple.NotAvailable)
{
printTask.Options.Staple = _printHelperOptions.Staple == PrintStaple.Default ? printTask.Options.Staple : _printHelperOptions.Staple;
}
if (printTask.Options.Orientation != PrintOrientation.NotAvailable)
{
printTask.Options.Orientation = _printHelperOptions.Orientation == PrintOrientation.Default ? printTask.Options.Orientation : _printHelperOptions.Orientation;
}
_printHelperOptions = null;
}
/// <summary>
/// Starts the print task.
/// </summary>
/// <param name="printTaskName">Name of the print task to use</param>
/// <param name="printHelperOptions">Settings for the print task</param>
/// <param name="directPrint">Directly print the content of the container instead of relying on list built with <see cref="AddFrameworkElementToPrint(FrameworkElement)"/> method</param>
/// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
public Task ShowPrintUIAsync(string printTaskName, PrintHelperOptions printHelperOptions, bool directPrint = false)
{
_printHelperOptions = printHelperOptions;
return(ShowPrintUIAsync(printTaskName, directPrint));
}
