mirror of
https://github.com/cyanfish/naps2.git
synced 2024-10-27 01:22:49 +03:00
77 lines
2.8 KiB
C#
77 lines
2.8 KiB
C#
using Gtk;
|
|
using NAPS2.Images.Gtk;
|
|
|
|
namespace NAPS2.ImportExport;
|
|
|
|
public class GtkScannedImagePrinter : IScannedImagePrinter
|
|
{
|
|
public Task<bool> PromptToPrint(
|
|
Eto.Forms.Window parentWindow, IList<ProcessedImage> images, IList<ProcessedImage> selectedImages)
|
|
{
|
|
if (!images.Any())
|
|
{
|
|
return Task.FromResult(false);
|
|
}
|
|
var printOp = new PrintOperation
|
|
{
|
|
NPages = images.Count,
|
|
UseFullPage = true,
|
|
HasSelection = selectedImages.Count > 1,
|
|
SupportSelection = selectedImages.Count > 1
|
|
};
|
|
if (selectedImages.Count == 1)
|
|
{
|
|
printOp.CurrentPage = images.IndexOf(selectedImages[0]);
|
|
}
|
|
var printTarget = images;
|
|
printOp.BeginPrint += (_, args) =>
|
|
{
|
|
if (printOp.PrintSettings.PrintPages == PrintPages.Selection)
|
|
{
|
|
printTarget = selectedImages;
|
|
printOp.NPages = printTarget.Count;
|
|
}
|
|
};
|
|
printOp.DrawPage += (_, args) =>
|
|
{
|
|
var image = printTarget[args.PageNr].Render();
|
|
try
|
|
{
|
|
var ctx = args.Context;
|
|
var cairoCtx = ctx.CairoContext;
|
|
|
|
if (Math.Sign(image.Width - image.Height) != Math.Sign(ctx.Width - ctx.Height))
|
|
{
|
|
// Flip portrait/landscape to match output
|
|
image = image.PerformTransform(new RotationTransform(90));
|
|
}
|
|
|
|
// Fit the image into the output rect (centered) while maintaining its aspect ratio
|
|
var heightBound = image.Width / ctx.Width < image.Height / ctx.Height;
|
|
var targetWidth = heightBound ? image.Width * ctx.Height / image.Height : ctx.Width;
|
|
var targetHeight = heightBound ? ctx.Height : image.Height * ctx.Width / image.Width;
|
|
var targetX = (ctx.Width - targetWidth) / 2;
|
|
var targetY = (ctx.Height - targetHeight) / 2;
|
|
cairoCtx.Translate(targetX, targetY);
|
|
cairoCtx.Scale(targetWidth / image.Width, targetHeight / image.Height);
|
|
|
|
Gdk.CairoHelper.SetSourcePixbuf(cairoCtx, image.AsPixbuf(), 0, 0);
|
|
cairoCtx.Paint();
|
|
}
|
|
finally
|
|
{
|
|
image.Dispose();
|
|
}
|
|
};
|
|
printOp.EndPrint += (_, args) =>
|
|
{
|
|
Log.Event(EventType.Print, new EventParams
|
|
{
|
|
Name = MiscResources.Print,
|
|
Pages = printOp.NPagesToPrint
|
|
});
|
|
};
|
|
var result = printOp.Run(PrintOperationAction.PrintDialog, (Window) parentWindow.ControlObject);
|
|
return Task.FromResult(result == PrintOperationResult.Apply);
|
|
}
|
|
} |