Thread: Adding to a tab window

I'm looking to add a bitmap image to some tabs and I keep coming up empty handed. I know there are plenty of examples on CodeProjects/CodeGuru, on MSDN, and through Google, but I am not finding anything on how to load a bitmap to a tab. I tried showing and hiding the image with tab selection but when the wanted tab is selected the bitmap covers up the tabs even if its positioned out of the tabs way. They still seem to disappear. I tried loading a bitmap to the handle of the tab window and still nothing works. I have been racking my brain on this for a couple days and cannot get it to work. Is there a way to do this, or is it really in depth, or what?

Your post makes it sound like you're doing this the wrong way. First, what exactly are you trying to do? Second, what have you done thus far? (Your code?)

If you're trying to put an image in the _tab_ part of a tab control, then TabCtrl_SetItem might be the function (well, macro) you want. Read the docs, see if that's what you're looking for. (See the relevant member in TCITEM, iImage - you'll also need to load in an image list. Works much the same as ListViews I think, call TabCtrl_SetImageList)

If you're trying to put an image in the _body_ part of a tab control, show us what you're doing thus far.

I guess I was pretty vague. I would like to add a picture that is, right now, in bitmap to the body part of a tab. I don't need an image in the tab/title part of the tab window. I have tried a couple approaches so far. One was loading the bitmap with the owner window being the dialog that owns the tab window. That did not work as it covered the tab window entirely and tabs were not viewable. Then I tried loading the bitmap so the tab window was the owner. That did not work as the picture did not show up on any tab, however, the tabs were viewable/selectable. Then I tried having it load the bitmap when a certain tab was selected, and that obviously failed. I did not think the last one would work, but it was worth a shot. I do not know if there is a way to make the bitmap in to a window, or the like, so I can show/hide it. Here is the entire section where my tab/bitmap code is.

EDIT: I'm actually still confused on how text is added to the tab bodies (using a resource dialog?), but that is not the issue here.

Code:

BOOL CALLBACK MathTableProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
    HDC hDC, MemDCMathTable, hdc, t_hDC;
    PAINTSTRUCT Ps, ps;
    HBITMAP bmpMathTable;
    TCITEM tcitem;
    NMHDR *pNMHdr;

    int tabctrl[10];

    switch(Message)
    {
        case WM_NOTIFY:
        {
            pNMHdr = (NMHDR *) lParam;

            if (pNMHdr->code == TCN_SELCHANGE)
            {
                int tabnum = TabCtrl_GetCurSel((HWND)pNMHdr->hwndFrom);

                hDC = GetDC(hwndTab);

                if(tabnum == 0){/* nothing right now */}

                ReleaseDC(hwndTab, hDC);

            }
            break;
        }

        case WM_INITDIALOG:
        {
            RECT rect;
            mathtablehwnd = hwnd;

            GetClientRect(hwnd, &rect);
            InitCommonControls();

            //Create tabbed window
            hwndTab = CreateWindow(WC_TABCONTROL,"",WS_CHILD|WS_VISIBLE,
                0,0,rect.right,rect.bottom,mathtablehwnd,NULL,
                (HINSTANCE)GetWindowLong(hwnd,GWL_HINSTANCE),NULL);

            //Set up tabs
            tcitem.mask = TCIF_TEXT;
            tcitem.iImage = -1;
            //Create tabs
            tcitem.pszText = "Pre-Algebra"; tabctrl[0] = TabCtrl_InsertItem(hwndTab, 0, &tcitem);
            tcitem.pszText = "Algebra"; tabctrl[1] = TabCtrl_InsertItem(hwndTab, 1, &tcitem);
            tcitem.pszText = "Trigonometry"; tabctrl[2]= TabCtrl_InsertItem(hwndTab, 2, &tcitem);
            tcitem.pszText = "Geometry"; tabctrl[3] = TabCtrl_InsertItem(hwndTab, 3, &tcitem);
            tcitem.pszText = "Calculus"; tabctrl[4] = TabCtrl_InsertItem(hwndTab, 4, &tcitem);



            //Change tab font
            SendMessage (hwndTab,WM_SETFONT,(WPARAM) GetStockObject(DEFAULT_GUI_FONT), 0);

            GetClientRect(hwndTab, &rect);
/*
            prealghwnd = CreateWindow("STATIC","",WS_CHILD|WS_VISIBLE,
                rect.left+5,rect.top+25,rect.right-7,rect.bottom-27,hwndTab,NULL,
                (HINSTANCE)GetWindowLong(hwndTab,GWL_HINSTANCE),NULL);
*/

            TabCtrl_SetCurSel(hwndTab,0);
            ShowWindow(prealghwnd,SW_SHOW);

        }
        break;

        case WM_PAINT:

            hDC = BeginPaint(hwndTab, &Ps);
            // Load the bitmap from the resource
            if(!(bmpMathTable = LoadBitmap(hInstance, MAKEINTRESOURCE(IDD_MATH))))
                MessageBox(hwnd,"error","error",MB_OK);
            // Create a memory device compatible with the above DC variable
            MemDCMathTable = CreateCompatibleDC(hDC);
            // Select the new bitmap
            SelectObject(MemDCMathTable, bmpMathTable);
            // Copy the bits from the memory DC into the current dc
            BitBlt(hDC, 15, 45, 250, 150, MemDCMathTable, 0, 0, SRCCOPY);
            // Restore the old bitmap
            DeleteDC(MemDCMathTable);
            DeleteObject(bmpMathTable);
            EndPaint(hwndTab, &Ps);

        break;

Figured it out. For future reference you need to SendMessage() to a static window with the STM_SETIMAGE message. Here is what it looks like.

Code:

        case WM_INITDIALOG:
        {
            RECT rect;
            tablehwnd = hwnd;

            //Get the size of the initial window space to work with
            GetClientRect(hwnd, &rect);
            InitCommonControls();

            //Create tabbed window
            hwndTab = CreateWindow(WC_TABCONTROL,"",WS_CHILD|WS_VISIBLE,
                0,0,rect.right,rect.bottom,tablehwnd,NULL,
                (HINSTANCE)GetWindowLong(hwnd,GWL_HINSTANCE),NULL);

            //Set up tabs
            tcitem.mask = TCIF_TEXT;
            tcitem.iImage = -1;

            //Create tabs
            tcitem.pszText = "Tab 1"; tabctrl[0] = TabCtrl_InsertItem(hwndTab, 0, &tcitem);
            tcitem.pszText = "Tab 2"; tabctrl[1] = TabCtrl_InsertItem(hwndTab, 1, &tcitem);
            tcitem.pszText = "Tab 3"; tabctrl[2]= TabCtrl_InsertItem(hwndTab, 2, &tcitem);
            tcitem.pszText = "Tab 4"; tabctrl[3] = TabCtrl_InsertItem(hwndTab, 3, &tcitem);
            tcitem.pszText = "Tab 5"; tabctrl[4] = TabCtrl_InsertItem(hwndTab, 4, &tcitem);

            //Change tab font
            SendMessage (hwndTab,WM_SETFONT,(WPARAM) GetStockObject(DEFAULT_GUI_FONT), 0);

            //Get the size of the tab window
            GetClientRect(hwndTab, &rect);

            //create static window for tabbed bitmap
            hwndStatic= CreateWindow(WC_STATIC,"",
                WS_CHILD|SS_BITMAP|WS_VISIBLE,
                rect.left+3,rect.top+23,rect.right-7,rect.bottom-27,hwndTab,NULL,
                (HINSTANCE)GetWindowLong(hwndTab,GWL_HINSTANCE),NULL);

            //if static window couldn't be loaded
            if(!hwndStatic)
                MessageBox(hwndTab,"Tabs loaded with an error!","Error",MB_OK);

            //Get the size of the static window
            GetClientRect(hwndStatic, &rect);
            //Place the bitmap inside the static window
            SendMessage(hwndPreAlg,STM_SETIMAGE,IMAGE_BITMAP,(LPARAM)LoadImage(GetModuleHandle(NULL),
                MAKEINTRESOURCE(IDD_BITMAP),IMAGE_BITMAP,rect.right-rect.left,rect.bottom-rect.top,LR_SHARED));

            //Set initial top level tab, and show it's contents
            TabCtrl_SetCurSel(hwndTab,0);
            ShowWindow(hwndStatic,SW_SHOW);

        }
        break;

New question: why is it that when I created the manifest file none of my bitmaps showed up? If I remove the manifest file the bitmaps come back. Is there a way around this?