private async void FieldSelected(object sender, RegionSelectedEventArgs e)
{
var tempFilePath = Path.GetTempFileName();
e.CroppedImage.Save(tempFilePath, System.Drawing.Imaging.ImageFormat.Tiff);
await AddFileTaskAsync(tempFilePath, e.CroppedImage);
}
private void Image_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
image.ReleaseMouseCapture();
if (selectBox.Visibility != Visibility.Visible)
{
return;
}
var imageOffset = VisualTreeHelper.GetOffset(image);
var visualLeft = Canvas.GetLeft(selectBox);
var visualTop = Canvas.GetTop(selectBox);
var width = selectBox.Width;
var height = selectBox.Height;
var bmpSource = (BitmapSource)image.Source;
var scaleX = bmpSource.PixelWidth / image.ActualWidth;
var scaleY = bmpSource.PixelHeight / image.ActualHeight;
var newWidth = width * scaleX;
var newHeight = height * scaleY;
if ((int)newWidth == 0 || (int)newHeight == 0)
{
return;
}
var newX = (visualLeft - imageOffset.X) * scaleX;
var newY = (visualTop - imageOffset.Y) * scaleY;
var src = (System.Drawing.Bitmap)System.Drawing.Image.FromFile(_sourceFile);
var target = new System.Drawing.Bitmap((int)newWidth, (int)newHeight);
target.SetResolution(src.HorizontalResolution, src.VerticalResolution);
using (var g = System.Drawing.Graphics.FromImage(target))
{
var rect = new System.Drawing.Rectangle((int)newX, (int)newY, (int)newWidth, (int)newHeight);
g.DrawImage(
src,
new System.Drawing.Rectangle(0, 0, target.Width, target.Height),
rect,
System.Drawing.GraphicsUnit.Pixel);
}
var ev = new RegionSelectedEventArgs(new Rect(newX, newY, newWidth, newHeight), target);
OnRegionSelected(ev);
selectBox.Visibility = Visibility.Hidden;
}
private void OnRegionSelected(RegionSelectedEventArgs e)
{
RegionSelected?.Invoke(this, e);
}