public void ZoomOut(int x, int y)
{
if (!zoomEnabled)
{
return;
}
if (this.Parent == null || zoom <= 1)
{
return;
}
if (this.Parent.GetType() != typeof(NewPanel))
{
return;
}
NewPanel parent = (NewPanel)this.Parent;
parent.SuspendDrawing();
//
zoom /= 2;
autoScrollPos = new Point(Math.Abs(this.Left), Math.Abs(this.Top));
autoScrollPos.X -= x / 2;
autoScrollPos.Y -= y / 2;
this.Width /= 2;
this.Height /= 2;
parent.AutoScrollPosition = autoScrollPos;
parent.VerticalScroll.SmallChange /= 2;
parent.HorizontalScroll.SmallChange /= 2;
parent.VerticalScroll.LargeChange /= 2;
parent.HorizontalScroll.LargeChange /= 2;
this.Invalidate();
this.Focus();
//
parent.ResumeDrawing();
parent.Invalidate();
}
// functions
public void ZoomIn(int x, int y)
{
if (!zoomEnabled)
{
return;
}
if (this.Parent == null || zoom >= 8 ||
Width >= 8192 || Height >= 8192)
{
return;
}
if (this.Parent.GetType() != typeof(NewPanel))
{
return;
}
NewPanel parent = (NewPanel)this.Parent;
parent.SuspendDrawing();
//
zoom *= 2;
autoScrollPos = new Point(Math.Abs(this.Left), Math.Abs(this.Top));
autoScrollPos.X += x;
autoScrollPos.Y += y;
this.Width *= 2;
this.Height *= 2;
parent.AutoScrollPosition = autoScrollPos;
parent.VerticalScroll.SmallChange *= 2;
parent.HorizontalScroll.SmallChange *= 2;
parent.VerticalScroll.LargeChange *= 2;
parent.HorizontalScroll.LargeChange *= 2;
this.Invalidate();
this.Focus();
//
parent.ResumeDrawing();
parent.Invalidate();
}
