public void OnMouseWheel(MouseEventArgs e)
{
double Factor;
if (e.Delta > 0)
{
Factor = 1.0 / 1.1;
}
else if (e.Delta < 0)
{
Factor = 1.1;
}
else
{
return;
}
Rectangle clr = canvas.ClientRectangle;
BoundingRect rct = new BoundingRect(clr.Left, clr.Bottom, clr.Right, clr.Top);
rct.Modify(screenToLayout);
System.Drawing.Point p = new System.Drawing.Point(e.X, e.Y);
p = canvas.PointToClient(Frame.UIService.CurrentMousePosition);
GeoPoint2D p2 = screenToLayout * new GeoPoint2D(p.X, p.Y);
rct.Right = p2.x + (rct.Right - p2.x) * Factor;
rct.Left = p2.x + (rct.Left - p2.x) * Factor;
rct.Bottom = p2.y + (rct.Bottom - p2.y) * Factor;
rct.Top = p2.y + (rct.Top - p2.y) * Factor;
(this as IView).ZoomToRect(rct);
(this as IView).InvalidateAll();
}
public void ZoomDelta(double f)
{
double Factor = f;
System.Drawing.Rectangle clr = canvas.ClientRectangle;
System.Drawing.Point p = new System.Drawing.Point((clr.Left + clr.Right) / 2, (clr.Bottom + clr.Top) / 2);
BoundingRect rct = new BoundingRect(clr.Left, clr.Bottom, clr.Right, clr.Top);
rct.Modify(screenToLayout);
GeoPoint2D p2 = screenToLayout * new GeoPoint2D(p.X, p.Y);
rct.Right = p2.x + (rct.Right - p2.x) * Factor;
rct.Left = p2.x + (rct.Left - p2.x) * Factor;
rct.Bottom = p2.y + (rct.Bottom - p2.y) * Factor;
rct.Top = p2.y + (rct.Top - p2.y) * Factor;
(this as IView).ZoomToRect(rct);
(this as IView).InvalidateAll();
}
