I don’t think anyone has ever asked for that particular combination.
To make it easier for you to override the method, here’s our definition:
protected virtual void StandardMouseWheel() {
Diagram diagram = this.Diagram;
if (diagram == null) return;
DiagramPanel panel = diagram.Panel;
if (panel == null) return;
int delta = GetWheelDelta();
if (delta == 0) return;
MouseWheelEventArgs e = diagram.LastMouseEventArgs as MouseWheelEventArgs;
WheelBehavior behave = this.WheelBehavior;
bool shift = IsShiftKeyDown();
bool control = IsControlKeyDown();
if (((behave & WheelBehavior.ControlZooms) == WheelBehavior.ControlZooms
&& !shift && control && diagram.AllowZoom) ||
((behave & WheelBehavior.Zooms) == WheelBehavior.Zooms
&& !shift && !control && diagram.AllowZoom)) {
// zoom in or out at current mouse point
Point oldzoom = panel.ZoomPoint;
panel.ZoomPoint = panel.TransformModelToView(diagram.LastMousePointInModel);
CommandHandler cmd = diagram.CommandHandler;
if (cmd != null) {
if (delta > 0)
cmd.IncreaseZoom(null);
else
cmd.DecreaseZoom(null);
} else {
if (delta > 0)
panel.Scale *= 1.05;
else
panel.Scale /= 1.05;
}
panel.ZoomPoint = oldzoom;
if (e != null) e.Handled = true;
} else if ((behave & WheelBehavior.ScrollsVertically) == WheelBehavior.ScrollsVertically
&& !shift && !control && diagram.AllowScroll) {
// scroll up or down
if (delta > 0)
panel.MouseWheelUp();
else
panel.MouseWheelDown();
if (e != null) e.Handled = true;
} else if ((behave & WheelBehavior.ShiftScrollsHorizontally) == WheelBehavior.ShiftScrollsHorizontally
&& shift && !control && diagram.AllowScroll) {
// scroll left or right
if (delta > 0)
panel.MouseWheelLeft();
else
panel.MouseWheelRight();
if (e != null) e.Handled = true;
}
}
Pardon me if there’s some use of internal methods or other members. If there is, I trust you can figure it out.
