I want to write a Snake game using GTK# but for several days I can't figure out the way dealing with DrawingArea. In all the examples that I've found, there's subscribtion to the drawingArea.ExposeEvent event, a method like:
void OnDrawingAreaExposed (object source, ExposeEventArgs args)
{
DrawingArea darea = (DrawingArea) source;
Cairo.Context ctx = Gdk.CairoHelper.Create (darea.GdkWindow);
// drawing here ...
((IDisposable) ctx.Target).Dispose();
((IDisposable) ctx).Dispose();
}
But I have neither .ExposeEvent event available on the DrawingArea object, nor the ExposeEventArgs data type.
I don't even know what it's about. I would like to deal with rendering, perhaps even in other way, for example to make a bitmap image then assign it to something like PictureBox from WinForms.
Also, I have to draw at set intervals, which means I need other GTK# methods too.
I used darea.GdkWindow to create the Cairo.Context, but it is maked as "deprecated". I've tried just creating a Cairo.Context and then drawing with the darea.Draw(cc) method, but that doesn't work either.
Use the DrawingArea.Drawn event.
var drawing = new DrawingArea();
drawing.Drawn += (s, e) =>
{
var cr = e.Cr;
cr.Rectangle(100, 100, 100, 100);
cr.SetSourceRGB(255, 0, 0);
cr.Fill();
};