private void scene_design(DrawingArea area, Cairo.Context cr)
{
area.AddEvents((int)Gdk.EventMask.ButtonPressMask);
area.ButtonPressEvent += delegate(object o, ButtonPressEventArgs arg) {
area.GetPointer(out xo, out yo);
pressed = true;
};
area.AddEvents((int)Gdk.EventMask.ButtonReleaseMask);
area.ButtonReleaseEvent += delegate(object o, ButtonReleaseEventArgs args) {
pressed = false;
UpdateViewSurface();
};
if (pressed)
{
area.GetPointer(out xt, out yt);
if (ventana.circulo.Active)
{
cr.LineWidth = 2;
cr.SetSourceRGBA(0, 0, 1, 0.5);
cr.Arc(xo, yo, Constantes.distancia(xt, xo), 0, Math.PI * 2);
cr.Stroke();
}
else if (ventana.linea.Active)
{
cr.LineWidth = 2;
cr.SetSourceRGBA(0, 1, 0, 0.5);
cr.MoveTo(xo, yo);
cr.LineTo(xt, yt);
cr.Stroke();
}
else if (ventana.rectangulo.Active)
{
cr.LineWidth = 2;
cr.SetSourceRGBA(1, 0, 0, 0.5);
cr.Rectangle(xo, yo, xt - xo, yt - yo);
cr.Stroke();
}
}
cr.SetSourceSurface(Constantes.viewSurface, 0, 0);
cr.Paint();
}
public override void calculateVelocity(BoidCollection s, DrawingArea area)
{
area.GetPointer(out x, out y);
y = (int)Logica.mapeo(y);
Velocity.X = x - Location.X;
Velocity.Y = y - Location.Y;
LocationNueva.X = x;
LocationNueva.Y = y;
}