C++

Forum

 
win32 - how can resize an ownerdraw menu item?

Cambalinho (1445)
i'm doing ownerdraw menus, but the menu item size isn't correct.
after some research i found that the WM_MEASUREITEM it's for change the menu item size:
1
2
3
4
5
6
7
8
9
10
11
 
case WM_MEASUREITEM:
                {
                    MEASUREITEMSTRUCT *DrawMenuSize=(MEASUREITEMSTRUCT *)lParam;
                    if(DrawMenuSize->CtlID==ODT_MENU)
                    {
                        DrawMenuSize->itemWidth=50;
                        DrawMenuSize->itemHeight=20;
                        return TRUE;
                    }
                }
                break;

but why the size isn't changed?
Thomas1965 (4571)
Are you sure that you have set your menu to owner draw ?
Have you checked that your message handler is actually called?
if(DrawMenuSize->CtlID==ODT_MENU)
According to MSDN the CtlID is not used for menus.
https://msdn.microsoft.com/en-us/library/windows/desktop/bb775804(v=vs.85).aspx
Cambalinho (1445)
i did a big mistake... it's 'CtlType'.
now i can resize it:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
 
case WM_MEASUREITEM:
                {
                    LPMEASUREITEMSTRUCT DrawMenuSize=(LPMEASUREITEMSTRUCT)lParam;
                    if(DrawMenuSize->CtlType==ODT_MENU)
                    {
                        Menu *mMenu=(Menu *)DrawMenuSize->itemData;
                        //DebugText(to_string(MenuItemSize.cx) + "\t" + to_string(MenuItemSize.cy));
                        if(MenuItemSize.cx>0 && MenuItemSize.cy>0)
                        {
                            DrawMenuSize->itemWidth=MenuItemSize.cx;
                            DrawMenuSize->itemHeight=MenuItemSize.cy;

                        }
                        else
                        {
                            DrawMenuSize->itemWidth=50;
                            DrawMenuSize->itemHeight=20;
                        }

                        return TRUE;
                    }

                }
                break;

                case WM_DRAWITEM:
                {
                     DRAWITEMSTRUCT *DrawMenuStructure=(DRAWITEMSTRUCT *)lParam;
                     if(DrawMenuStructure->CtlType==ODT_MENU)
                     {
                        MENUITEMINFO menuInfo;
                        menuInfo.cbSize = sizeof(MENUITEMINFO);
                        menuInfo.fMask=MIIM_DATA;
                        GetMenuItemInfo((HMENU)DrawMenuStructure->hwndItem,DrawMenuStructure->itemID, FALSE, &menuInfo );
                        Menu *mMenu = (Menu *) menuInfo.dwItemData;
                        if(mMenu->MenuDrawed)
                            mMenu->MenuDrawed(DrawMenuStructure->hDC,DrawMenuStructure->rcItem,&MenuItemSize, DrawMenuStructure->itemState);
                        if((DrawMenuStructure->rcItem.bottom!=MenuItemSize.cy) && (DrawMenuStructure->rcItem.right!=MenuItemSize.cx) )
                        {
                            DrawMenuBar(inst->hwnd);
                            mMenu->SetMenuDrawed(!mMenu->GetMenuDrawed());
                            mMenu->SetMenuDrawed(!mMenu->GetMenuDrawed());
                        }
                        if(mMenu->MenuDrawed)
                            mMenu->MenuDrawed(DrawMenuStructure->hDC,DrawMenuStructure->rcItem,&MenuItemSize, DrawMenuStructure->itemState);
                     }
                }
                break;

but for be redrawed, i must move the mouse to it. can you advice more?
Topic archived. No new replies allowed.