protected IntPtr DelegateToCallbackPointer(
HDrawingObject.HDrawingObjectCallbackClass c,
string evt)
{
HDrawingObject.HDrawingObjectCallback hdrawingObjectCallback = (HDrawingObject.HDrawingObjectCallback)((drawid, window, type) =>
{
HDrawingObject drawid1 = new HDrawingObject(drawid);
HWindow window1 = new HWindow(window);
drawid1.Detach();
window1.Detach();
c(drawid1, window1, type);
});
GC.KeepAlive((object)hdrawingObjectCallback);
GC.SuppressFinalize((object)hdrawingObjectCallback);
switch (evt)
{
case "on_resize":
this.onresize = hdrawingObjectCallback;
break;
case "on_attach":
this.onattach = hdrawingObjectCallback;
break;
case "on_detach":
this.ondetach = hdrawingObjectCallback;
break;
case "on_drag":
this.ondrag = hdrawingObjectCallback;
break;
case "on_select":
this.onselect = hdrawingObjectCallback;
break;
}
return(Marshal.GetFunctionPointerForDelegate(hdrawingObjectCallback));
}
/// <summary>Adds a callback for the detach event, that is, this callback is
/// executed when a drawing object is detached from the window.</summary>
/// <param name="f">Callback function with the signature defined by
/// HDrawingObjectCallback</param>
public void OnDetach(HDrawingObject.HDrawingObjectCallbackClass f)
{
this.SetDrawingObjectCallback("on_detach", this.DelegateToCallbackPointer(f, "on_detach"));
}
/// <summary>Adds a callback for the resize event, that is, this callback is
/// executed whenever the drawing object is selected.</summary>
/// <param name="f">Callback function with the signature defined by
/// HDrawingObjectCallback</param>
public void OnSelect(HDrawingObject.HDrawingObjectCallbackClass f)
{
this.SetDrawingObjectCallback("on_select", this.DelegateToCallbackPointer(f, "on_select"));
}
/// <summary>Adds a callback for the resize event, that is, this callback is
/// executed whenever the user changes any of the dimensions of the draw
/// object.</summary>
/// <param name="f">Callback function with the signature defined by
/// HDrawingObjectCallback</param>
public void OnResize(HDrawingObject.HDrawingObjectCallbackClass f)
{
this.SetDrawingObjectCallback("on_resize", this.DelegateToCallbackPointer(f, "on_resize"));
}