hi,
I'm writing an application that allows users to import picture and do some
basic editing like scaling, cropping or rotating. If the image is large the
processing of course takes a while during which the interface does not
respond. So I want to do the processing in a thread.
Right now I have the event callback function that starts a new thread with
the scaling process. When the scaling is done I call a function in my main
class again to draw the pixbuf onto an Gtk.DrawingArea.
I'm afraid my entire approch is wrong so if anyone can come up with a tip I
would be very grateful.
[code]
public class ScaleJob
{
Gdk.Pixbuf pixbuf;
double scale_x, scale_y;
MainClass obj;
public ScaleJob(Gdk.Pixbuf buf, double scalex,double scaley,
InsertDateTimeAddin _obj)
{
scale_x = scalex;
scale_y = scaley;
pixbuf = buf;
obj = _obj;
}
public void Run()
{
pixbuf = pixbuf.ScaleSimple((int)(scale_x*(double)pixbuf.Width),
(int)(scale_y*(double)pixbuf.Height),InterpType.Nearest);
obj.ScaleJobCB(pixbuf);
}
}
private void EventCallback(object source, System.EventArgs args)
{
if(scale_running)
return;
scale_running = true;
double sx = spin_scale_x.Value, sy = spin_scale_y.Value;//Scale X,
Scale Y
values
ScaleJob job = new ScaleJob(pixbuf, sx, sy, this);
(new Thread(new ThreadStart(job.Run))).Start();
}
public void ScaleJobCB(Gdk.Pixbuf pix)
{
Gdk.Threads.Enter();
pixm.DrawPixbuf(image.Style.BlackGC, pix,
0, 0, 0, 0, pix.Width, pix.Height,
RgbDither.None, 0,0);
Gdk.Threads.Leave();
image.QueueDrawArea(0,0,600,400);//Image is the Gtk.DrawingArea
scale_running = false;
}
[/code]
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