protected override bool OnExposeEvent(Gdk.EventExpose ev)
{
Gdk.Window win = ev.Window;
Gdk.Rectangle rect = ev.Area;
Gdk.GC gc = this.Style.BaseGC(StateType.Normal);
lock (this.drawLock){
if (this.toDraw != null)
{
//Raise events for the symbols...
bool gotSymbol = false;
//See if there's a new symbol
if (this.symbols != null)
{
foreach (Symbol s in this.symbols)
{
if (s.Count > 0 && this.data != s.ToString())
{
this.data = s.ToString();
//Don't raise it inside the expose event :)
GLib.IdleHandler raiser = delegate(){
if (this.BarScanned != null)
{
this.BarScanned(this, new BarScannedArgs(s));
}
return(false);
};
GLib.Idle.Add(raiser);
gotSymbol = true;
}
}
}
//Avoid beeping more than once..
if (gotSymbol)
{
if (!this.Mute)
{
System.Media.SystemSounds.Beep.Play();
}
if (this.overlayingFrames == 0)
{
GLib.TimeoutHandler hdl = delegate(){
this.QueueDraw();
this.overlayingFrames -= 1;
return(this.overlayingFrames > 0);
};
GLib.Timeout.Add(35, hdl);
}
//Start drawing an overlay
this.overlayingFrames = overlayFrameCount;
}
this.symbols = null; //Symbols have been handled
//See if we want to request a resize
if (this.reqHeight != this.toDrawHeight ||
this.reqWidth != this.toDrawWidth)
{
this.reqHeight = this.toDrawHeight;
this.reqWidth = this.toDrawWidth;
this.QueueResize();
}
//Draw the gray image
int w = Math.Min(rect.Size.Width, this.toDrawWidth);
int h = Math.Min(rect.Size.Height, this.toDrawHeight);
//Draw the image
win.DrawGrayImage(gc, 0, 0, w, h, Gdk.RgbDither.Normal, this.toDraw, this.toDrawWidth);
if (this.overlayingFrames > 0)
{
Pixbuf overlay_tmp = overlay;
if (this.overlay.Width > w * 0.8 || this.overlay.Height > h * 0.8)
{
int overlayMaxSize = Math.Min(h * 80 / 100, w * 80 / 100);
overlay_tmp = overlay.ScaleSimple(overlayMaxSize, overlayMaxSize, InterpType.Bilinear);
}
w = Math.Min(this.toDrawWidth, (int)overlay_tmp.Width);
h = Math.Min(this.toDrawHeight, (int)overlay_tmp.Height);
using (Gdk.Pixbuf pix = new Pixbuf(Colorspace.Rgb, true, 8, w, h)){
pix.Fill(0x00000000); //Fill with invisibility :)
overlay_tmp.Composite(pix, 0, 0, w, h, 0, 0, 1, 1, InterpType.Bilinear, 255 / 35 * this.overlayingFrames);
win.DrawPixbuf(gc, pix, 0, 0,
(this.toDrawWidth - w) / 2,
(this.toDrawHeight - h) / 2, w, h, RgbDither.Normal, 0, 0);
}
}
}
else
{
win.DrawRectangle(gc, true, rect);
int w = Math.Min(this.toDrawWidth, (int)this.sourceMissing.Width);
int h = Math.Min(this.toDrawHeight, (int)this.sourceMissing.Height);
Rectangle img = new Rectangle((this.toDrawWidth - w) / 2,
(this.toDrawHeight - h) / 2,
w, h);
Rectangle target = Rectangle.Intersect(img, rect);
if (target != Rectangle.Zero)
{
win.DrawPixbuf(gc, this.sourceMissing,
Math.Max(target.X - img.X, 0),
Math.Max(target.Y - img.Y, 0),
target.X,
target.Y,
target.Width,
target.Height,
RgbDither.Normal, 0, 0);
}
}
}
return(true);
}
