public static void TransposeToAllignPoints(this IView2D view, Point2D world, Point screen, AxisSelection mode = AxisSelection.Both)
{
Point2D screenPosWS = view.ScreenSpace2WorldSpace(screen.X, screen.Y);
//nudge the screen so the mouse is zooming in on a point;
Point2D nudge = screenPosWS - world;
nudge *= view.Zoom;
switch (mode)
{
case AxisSelection.Both:
view.TransformX += nudge.X;
view.TransformY += nudge.Y;
break;
case AxisSelection.Vertical:
view.TransformY += nudge.Y;
break;
case AxisSelection.Horizontal:
view.TransformX += nudge.X;
break;
}
}
protected void adjustZoomByWheel(int delta, int x, int y)
{
try
{
if (delta != 0)
{
if (view != null)
{
Point2D oldMousePosWS = view.ScreenSpace2WorldSpace(x, y);
//double oldZoom = view.Zoom;
//double newZoom = oldZoom + (delta / 1200.0);
//double factor = Math.Pow(view.Zoom, Math.Log10(Math.Abs(delta)));
double factor = Math.Abs((view.Zoom / 15) * (delta / 120));
factor = (delta > 0) ? factor : -factor;
double newZoom = view.Zoom + factor;
if (isValidZoomLevel(newZoom))
{
view.Zoom = newZoom;
view.TransposeToAllignPoints(oldMousePosWS, new Point(x, y));
}
else
{
//WDAppLog.Debug("bad zoom: " + newZoom);
view.Zoom = Math.Max(Math.Min(newZoom, MaxZoom), MinZoom);
view.TransposeToAllignPoints(oldMousePosWS, new Point(x, y));
}
DoViewChangeTasks();
picMain.Refresh();
}
}
}
catch { }
}
public MouseEventWorldSpace(int x, int y, MouseButtons button, IView2D view)
{
location = view.ScreenSpace2WorldSpace(new Point2D(x, y));
this.Button = button;
}
public static Point2D ScreenSpace2WorldSpace(this IView2D view, Point screenSpace)
{
return(view.ScreenSpace2WorldSpace(screenSpace.X, screenSpace.Y));
}