public override void Clear()
{
//strokes.Clear();
using(Graphics bgGraphics = Graphics.FromImage(bgBitmap))
{
bgGraphics.Clear(Color.White);
}
lastStroke=null;
strokeCount=0;
//El metodo QueueDraw de los widget gtk fuerza el redibujado del control
QueueDraw();
ClearedEvent();
}
public override void UndoLastStroke()
{
if(lastStroke!=null)
{
lastStroke=null;
strokeCount--;
QueueDraw();
StrokeRemovedEvent();
if(strokeCount==0)
{
ClearedEvent();
}
}
}
//Gestion del apretar el boton del raton en el control,
//empezamos a dibujar
protected override bool OnButtonPressEvent(Gdk.EventButton arg)
{
//Vemos si es el botón principal del ratón
if(arg.Button==1)
{
mouseButtonPressed=true;
oldX=(int)arg.X;
oldY=(int)arg.Y;
if(lastStroke!=null)
{
using(Graphics bgGraphics = Graphics.FromImage(bgBitmap))
{
bgGraphics.SmoothingMode = this.smoothingMode;
lastStroke.Draw(bgGraphics);
}
}
lastStroke=new Stroke(foreground);
lastStroke.AddPoint(new Point((int)arg.X,(int)arg.Y));
}
return true;
}
