topic Re: Method AcPane::DisplayPopupPaneMenu() makes AutoCAD crash in ObjectARX Forum

Method AcPane::DisplayPopupPaneMenu() makes AutoCAD crash

Anonymous — Tue, 09 Jul 2019 11:06:42 GMT

I have a class MyPane deriver from AcPane. During ARX startup I add it to AutoCAD status bar. My goal is to display popup menu when I left-click on MyPane. There is an event

virtual void AcStatusBarItem::OnLButtonDown(UINT nFlags, CPoint point)

which allows me to do that.

Here is my code

void MyPane::OnLButtonDown(UINT nFlags, CPoint point)
{
CAcModuleResourceOverride resOverride; // I tried to define menu globally to get rid of CAcModuleResourceOverride from here. no luck
CMenu menu;
CMenu.LoadMenu(MAKEINTRESOURCE(IDM_SOME_MENU));
// no need for result right now
DisplayPopupPaneMenu(menu);
}

Last line makes AutoCAD crash with access violation error.

P.S. MyPane class has ACSB_POPUP style.

Re: Method AcPane::DisplayPopupPaneMenu() makes AutoCAD crash

deepak.a.s.nadig — Thu, 11 Jul 2019 08:55:21 GMT

I am unable to recreate the crash at my end using the sample downloadable in the below link
https://adndevblog.typepad.com/autocad/2015/04/positioning-acpane-in-statusbar.html

I have made the following changes to the sample (ensure ARXDBG tool is loaded)

1) Display the the ARXDBG_MNU_APP of the ARXDBG tool :

void CPaneItem::OnLButtonDown(UINT nFlags, CPoint point)
{
	CMenu menu;
	CAcModuleResourceOverride();
	if (menu.LoadMenu(ARXDBG_MNU_APP)) {
		DisplayPopupPaneMenu(menu);
	}
}

2) Set the ACSB_POPUP style to the pane item

Image after left button click on the pane item

Re: Method AcPane::DisplayPopupPaneMenu() makes AutoCAD crash

Anonymous — Fri, 12 Jul 2019 05:49:43 GMT

Thank you for your reply. I have found the reason which caused the problem.

In 'rc' file my menu was declared like this:

IDM_SOME_MENU MENU 
BEGIN
    MENUITEM "Item 1",                 ID_MENU_ITEM1
    MENUITEM "Item 2",                 ID_MENU_ITEM2
    MENUITEM "Item 3",                 ID_MENU_ITEM3
END

But it should look like this:

IDM_SOME_MENU MENU 
BEGIN
    POPUP "Some Menu"
    BEGIN
        MENUITEM "Item 1",                 ID_MENU_ITEM1
        MENUITEM "Item 2",                 ID_MENU_ITEM2
        MENUITEM "Item 3",                 ID_MENU_ITEM3
    END
END

With this kind of popup menu I finally could get it work properly.