Popup Menus

[Marissa182]

Hi im creating a popup menu but i only want it to show up when the user right clicks on a tree ctrl in a dialog i mapped the tree controls onrightclick but i dont know how to get the mouse coordinates what is the best way to handle a popup menu for a tree control within a dialog

[HPSI]

It would be better to use WM_CONTEXTMENU instead of the right-click. The reason for this is that OnContextMenu() also catches Shift+F10, which is the Windows standard shortcut key for context menus (try it in the Explorer). But to catch right-clicks with OnContextMenu(), you also have to have a handler for ON_WM_RBUTTONDOWN - otherwise, the tree control will think you are starting a drag operation. One final thing: if OnContextMenu gets called because of Shift+F10, the point will always be -1, -1. Therefore, always use GetCursorPos() to get the actual point. Here is an example (it assumes you have derived a minimal CMyTreeCtrl from CTreeCtrl):

void CMyTreeCtrl::OnRButtonDown(UINT nFlags, CPoint point)
{
// disable this message to allow OnContextMenu to work

//CTreeCtrl::OnRButtonDown(nFlags, point);

}

void CMyTreeCtrl::OnContextMenu(CWnd* pWnd, CPoint point)
{
CPoint pos;
GetCursorPos(&pos);
ScreenToClient(&pos);

UINT flags = 0;
HTREEITEM hItem = HitTest(pos, &flags);

SetFocus();
if (hItem != NULL)
{
    SelectItem(hItem);

    CMenu menu;
    menu.CreatePopupMenu();

    VERIFY(menu.AppendMenu(MF\_STRING, ID\_MYID, "My Selection"));

    // display the menu
    GetCursorPos(&pos);        // need screen coordinates
    VERIFY(menu.TrackPopupMenu(TPM\_LEFTALIGN | TPM\_LEFTBUTTON, pos.x, pos.y, this));
}
else
{
    TRACE("not on item\\n");
}

}

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[Anonymous]

void CTestView::OnContextMenu(CWnd* pWnd, CPoint point) { CMenu *pMenu,oMenu; oMenu.LoadMenu(IDR_TESTMFTYPE); pMenu = oMenu.GetSubMenu(0); pMenu->EnableMenuItem(ID_FILE_NEW,MF_DISABLED | MF_GRAYED); pMenu->TrackPopupMenu(0,point.x,point.y,this); }

[Snillet2k]

I readed this topic and I tested it. HitTest() and SelectItem() dosen't exist when i try to complie it. Do I have to include header files or something?