#pragma warning disable CS1998 // Async method lacks 'await' operators and will run synchronously
async void OnPrintDetailOptionChanged(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
#pragma warning restore CS1998 // Async method lacks 'await' operators and will run synchronously
{
bool invalidatePreview = false;
string optionId = args.OptionId as string;
if (string.IsNullOrEmpty(optionId))
{
return;
}
if (optionId == "Margins")
{
PrintCustomItemListOptionDetails marginsOption = (PrintCustomItemListOptionDetails)sender.Options["Margins"];
string marginsValue = marginsOption.Value.ToString();
switch (marginsValue)
{
case "WideMargins":
ApplicationContentMarginTop = 0.2;
ApplicationContentMarginLeft = 0.2;
break;
case "ModerateMargins":
ApplicationContentMarginTop = 0.1;
ApplicationContentMarginLeft = 0.1;
break;
case "NarrowMargins":
ApplicationContentMarginTop = 0.05;
ApplicationContentMarginLeft = 0.05;
break;
}
if (marginsValue == "NarrowMargins")
{
marginsOption.WarningText = "Narrow margins may not be supported by some printers";
}
else
{
marginsOption.WarningText = "";
}
invalidatePreview = true;
}
if (invalidatePreview)
{
//await PrintPage.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
//{
Xamarin.Forms.Device.BeginInvokeOnMainThread(() =>
{
printDocument.InvalidatePreview();
});
//});
}
}
async void OnOptionDetailsOptionChanged(PrintTaskOptionDetails sender,
PrintTaskOptionChangedEventArgs args)
{
if (args.OptionId == null)
{
return;
}
string optionId = args.OptionId.ToString();
string strValue = sender.Options[optionId].Value.ToString();
string errorText = String.Empty;
double value = 0;
switch (optionId)
{
case "idFontSize":
if (!Double.TryParse(strValue, out value))
{
errorText = "Value must be numeric";
}
else if (value < 4 || value > 36)
{
errorText = "Value must be between 4 and 36";
}
break;
case "idLeftMargin":
case "idTopMargin":
case "idRightMargin":
case "idBottomMargin":
if (!Double.TryParse(strValue, out value))
{
errorText = "Value must be numeric";
}
else if (value < 0 || value > 2)
{
errorText = "Value must be between 0 and 2";
}
break;
}
sender.Options[optionId].ErrorText = errorText;
// If there's no error, then invalidate the preview
if (String.IsNullOrEmpty(errorText))
{
await this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
printDocument.InvalidatePreview();
});
}
}
async void OnOptionDetailsOptionChanged(PrintTaskOptionDetails sender,
PrintTaskOptionChangedEventArgs args)
{
if (args.OptionId == null)
{
return;
}
string optionId = args.OptionId.ToString();
string strValue = sender.Options[optionId].Value.ToString();
string errorText = String.Empty;
switch (optionId)
{
case "idPrintRange":
switch (strValue)
{
case "idPrintAll":
if (sender.DisplayedOptions.Contains("idCustomRangeEdit"))
{
sender.DisplayedOptions.Remove("idCustomRangeEdit");
}
break;
case "idPrintCustom":
sender.DisplayedOptions.Add("idCustomRangeEdit");
break;
}
break;
case "idCustomRangeEdit":
// Check to see if CustomPageRange accepts this
if (!new CustomPageRange(strValue, bookPages.Length).IsValid)
{
errorText = "Use the form 2-4, 7, 9-11";
}
break;
}
sender.Options[optionId].ErrorText = errorText;
// If no error, then invalidate the preview
if (String.IsNullOrEmpty(errorText))
{
await this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
printDocument.InvalidatePreview();
});
}
}
private void HandleCustomOptionsOptionChanged
(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
{
// Called in response to a setting being changed.
// Determine if it was a custom setting and react accordingly
var optionId = args.OptionId as String;
if (LayoutOptionId.Equals(optionId) ||
PreviewTypeOptionId.Equals(optionId) ||
PageTitleOptionId.Equals(optionId))
{
// Invalidate the preview content to force it to refresh.
// This has to happen on the UI thread.
_dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() => _printDocument.InvalidatePreview());
}
}
private async void printDetailedOptions_OptionChanged(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
{
string optionId = args.OptionId as string;
if (string.IsNullOrEmpty(optionId))
{
return;
}
if (optionId == "PageContent")
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
printDoc.InvalidatePreview();
});
}
}
/// <summary>
/// This is the event handler for PrintManager option changed.
/// </summary>
/// <param name="sender">PrintTaskOptionDetails</param>
/// <param name="args">PrintTaskOptionChangedEventArgs </param>
private static async void PrintDetailedOptions_OptionChanged(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
{
bool invalidatePreview = false;
string optionId = args.OptionId as string;
if (string.IsNullOrEmpty(optionId))
{
return;
}
if (optionId == "HeaderText")
{
PrintCustomTextOptionDetails headerText = (PrintCustomTextOptionDetails)sender.Options["HeaderText"];
_headerText = headerText.Value.ToString();
invalidatePreview = true;
}
if (optionId == "FooterText")
{
PrintCustomTextOptionDetails footerText = (PrintCustomTextOptionDetails)sender.Options["FooterText"];
_footerText = footerText.Value.ToString();
invalidatePreview = true;
}
if (optionId == "LeftMargin")
{
PrintCustomTextOptionDetails leftMargin = (PrintCustomTextOptionDetails)sender.Options["LeftMargin"];
var leftMarginValueConverterArg = double.TryParse(leftMargin.Value.ToString(), out var leftMarginValue);
if (leftMarginValue > 50 || leftMarginValue < 0 || !leftMarginValueConverterArg)
{
leftMargin.ErrorText = _resourceLoader.GetString("Print_ErrorMsg_ValueOutOfRange");
return;
}
else if (Math.Round(leftMarginValue, 1) != leftMarginValue)
{
leftMargin.ErrorText = _resourceLoader.GetString("Print_ErrorMsg_DecimalOutOfRange");
return;
}
leftMargin.ErrorText = string.Empty;
_applicationContentMarginLeft = (Math.Round(leftMarginValue / 100, 3));
invalidatePreview = true;
}
if (optionId == "TopMargin")
{
PrintCustomTextOptionDetails topMargin = (PrintCustomTextOptionDetails)sender.Options["TopMargin"];
var topMarginValueConverterArg = double.TryParse(topMargin.Value.ToString(), out var topMarginValue);
if (topMarginValue > 50 || topMarginValue < 0 || !topMarginValueConverterArg)
{
topMargin.ErrorText = _resourceLoader.GetString("Print_ErrorMsg_ValueOutOfRange");
return;
}
else if (Math.Round(topMarginValue, 1) != topMarginValue)
{
topMargin.ErrorText = _resourceLoader.GetString("Print_ErrorMsg_DecimalOutOfRange");
return;
}
topMargin.ErrorText = string.Empty;
_applicationContentMarginTop = (Math.Round(topMarginValue / 100, 3));
invalidatePreview = true;
}
if (invalidatePreview)
{
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
_printDocument.InvalidatePreview();
});
}
}