Reset static control's text ?

This is a discussion on Reset static control's text ? within the Windows Programming forums, part of the Platform Specific Boards category; Hey, i'd like to know how to reset a static control's text to nothing. when i declare the control, i ...

  1. #1
    Shibby willc0de4food's Avatar
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    Reset static control's text ?

    Hey, i'd like to know how to reset a static control's text to nothing. when i declare the control, i have nothing in it. when a menu item is clicked, text gets sent to the controls. then when a different menu item is clicked, if the previous text is longer then the new text, you see the new text + the remainder of the previous text. thanks
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  2. #2
    Even death may die... Dante Shamest's Avatar
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    Would the following not serve your purpose?

    Code:
    // hwndStatic is your static control
    SetWindowText( hwndStatic, "" );

  3. #3
    Shibby willc0de4food's Avatar
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    thanks but I don't think so.. that just makes the title bar of my window go to nothing. :-\ lol
    this is one of my control's:
    Code:
                 CreateWindowEx(0, TEXT("STATIC"), TEXT(""), WS_CHILD | WS_VISIBLE | SS_SIMPLE, 
                 160, 8, 150, 23, hwnd, (HMENU)ID_LABEL1, g_hInst, NULL);
    then when you click on a menu item:
    Code:
                 SendDlgItemMessage(hwnd, ID_LABEL1, WM_SETTEXT, 0, (LPARAM)fahr_to_cels);
                 SendDlgItemMessage(hwnd, ID_LABEL4, WM_SETTEXT, 0, (LPARAM)tempcel);
    gets sent to the control.
    but then when something else gets sent to the same control, it still shows text from ^ that as its the longest string.
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  4. #4
    Even death may die... Dante Shamest's Avatar
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    Quote Originally Posted by willc0de4food
    thanks but I don't think so.. that just makes the title bar of my window go to nothing.
    Make sure you pass the handle of your static control, not the handle of your main window.

    Alternatively, try SetDlgItemText.

    Code:
    SetDlgItemText( hwnd, ID_LABEL1, "");

  5. #5
    Shibby willc0de4food's Avatar
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    no dice. i have no clue why.. here's more code.
    Code:
    ...
    
    void UncheckMenu(HWND hwnd)
    {
         int menu = 0, submenu = 0;
         char holder[3] = {0};
         
         /* check to see if a menu item is already checked. if it is, uncheck it. */
         if (menucheck[0] == 49)
         {
             holder[0] = menucheck[1];
             menu = atoi(holder);
             holder[0] = menucheck[2];
             submenu = atoi(holder);
             
             if (menu == 1)
             {  
                 if (submenu == 1)
                 {   CheckMenuItem(GetMenu(hwnd), ID_UNITS_FTOC, MF_UNCHECKED);   }
                 else if (submenu == 2)
                 {    CheckMenuItem(GetMenu(hwnd), ID_UNITS_FTOK, MF_UNCHECKED);  }
                 else
                 {    MessageBox(hwnd, "An error occured in the menu.\nPlease restart the application.", "Error", MB_OK | MB_ICONERROR);   }
             }
             else if (menu == 2)
             {
                  if (submenu == 1)
                 {   CheckMenuItem(GetMenu(hwnd), ID_UNITS_CTOF, MF_UNCHECKED);   }
                 else if (submenu == 2)
                 {    CheckMenuItem(GetMenu(hwnd), ID_UNITS_CTOK, MF_UNCHECKED);  }
                 else
                 {    MessageBox(hwnd, "An error occured in the menu.\nPlease restart the application.", "Error", MB_OK | MB_ICONERROR);   }
             }
             else if (menu == 3)
             {
                  if (submenu == 1)
                 {   CheckMenuItem(GetMenu(hwnd), ID_UNITS_KTOF, MF_UNCHECKED);   }
                 else if (submenu == 2)
                 {    CheckMenuItem(GetMenu(hwnd), ID_UNITS_KTOC, MF_UNCHECKED);  }
                 else
                 {    MessageBox(hwnd, "An error occured in the menu.\nPlease restart the application.", "Error", MB_OK | MB_ICONERROR);   }
             }
             else
             {    MessageBox(hwnd, "An error occured in the menu.\nPlease restart the application.", "Error", MB_OK | MB_ICONERROR);   }
         }
    }
    
    /* This function sets the labels so the user knows whats going on */
    void SetLabel(HWND hwnd, int from, int to)
    {
         TCHAR fahr_to_cels[22] = "Fahrenheit to Celsius", cels_to_fahr[22] = "Celsius to Fahrenheit", fahr_to_kelv[22] = "Fahrenheit to Kelvin", kelv_to_fahr[22] = "Kelvin to Fahrenheit", cels_to_kelv[24] = "Celsius to Kelvin", kelv_to_cels[24] = "Kelvin to Celsius";
         TCHAR tempfahr[19] = "Temp in Fahrenheit", tempcel[20] = "Temp in Celsius", tempkel[20] = "Temp in Kelvin";
         
         UncheckMenu(hwnd);
         
         /*SetWindowText((HWND)ID_LABEL1, "");
         SetWindowText((HWND)ID_LABEL2, "");
         SetWindowText((HWND)ID_LABEL4, "");*/
         SetDlgItemText(hwnd, ID_LABEL1, "");
         SetDlgItemText(hwnd, ID_LABEL2, "");
         SetDlgItemText(hwnd, ID_LABEL4, "");
         
         /* 1 = fahrenheit, 2 = celsius, 3 = kelvin. */
         if (from == 1)
         {
             SendDlgItemMessage(hwnd, ID_LABEL2, WM_SETTEXT, 0, (LPARAM)tempfahr);
             if (to == 1)
             {
                 CheckMenuItem(GetMenu(hwnd), ID_UNITS_FTOC, MF_CHECKED);
                 menucheck[0] = 49;
                 menucheck[1] = 49;
                 menucheck[2] = 49;
                 SendDlgItemMessage(hwnd, ID_LABEL1, WM_SETTEXT, 0, (LPARAM)fahr_to_cels);
                 SendDlgItemMessage(hwnd, ID_LABEL4, WM_SETTEXT, 0, (LPARAM)tempcel);
             }
             else if (to == 2)
             {
                 CheckMenuItem(GetMenu(hwnd), ID_UNITS_FTOK, MF_CHECKED);
                 menucheck[0] = 49;
                 menucheck[1] = 49;
                 menucheck[2] = 50;
                 SendDlgItemMessage(hwnd, ID_LABEL1, WM_SETTEXT, 0, (LPARAM)fahr_to_kelv);
                 SendDlgItemMessage(hwnd, ID_LABEL4, WM_SETTEXT, 0, (LPARAM)tempkel);
             }
             else { MessageBox(hwnd, "There was an error receiving your request.\nPlease restart the application.", "Error!", MB_OK | MB_ICONERROR); }
         }
         else if (from == 2)
         {
             SendDlgItemMessage(hwnd, ID_LABEL2, WM_SETTEXT, 0, (LPARAM)tempcel);
             if (to == 1)
             {
                 CheckMenuItem(GetMenu(hwnd), ID_UNITS_CTOF, MF_CHECKED);
                 menucheck[0] = 49;
                 menucheck[1] = 50;
                 menucheck[2] = 49;
                 SendDlgItemMessage(hwnd, ID_LABEL1, WM_SETTEXT, 0, (LPARAM)cels_to_fahr);
                 SendDlgItemMessage(hwnd, ID_LABEL4, WM_SETTEXT, 0, (LPARAM)tempfahr);
             }
             else if (to == 2)
             {
                 CheckMenuItem(GetMenu(hwnd), ID_UNITS_CTOK, MF_CHECKED);
                 menucheck[0] = 49;
                 menucheck[1] = 50;
                 menucheck[2] = 50;
                 SendDlgItemMessage(hwnd, ID_LABEL1, WM_SETTEXT, 0, (LPARAM)cels_to_kelv);
                 SendDlgItemMessage(hwnd, ID_LABEL4, WM_SETTEXT, 0, (LPARAM)tempkel);
             }
             else { MessageBox(hwnd, "There was an error receiving your request.\nPlease restart the application.", "Error!", MB_OK | MB_ICONERROR); }
         }
         else if (from == 3)
         {
             SendDlgItemMessage(hwnd, ID_LABEL2, WM_SETTEXT, 0, (LPARAM)tempkel);
             if (to == 1)
             {
                 CheckMenuItem(GetMenu(hwnd), ID_UNITS_KTOF, MF_CHECKED);
                 menucheck[0] = 49;
                 menucheck[1] = 51;
                 menucheck[2] = 49;
                 SendDlgItemMessage(hwnd, ID_LABEL1, WM_SETTEXT, 0, (LPARAM)kelv_to_fahr);
                 SendDlgItemMessage(hwnd, ID_LABEL4, WM_SETTEXT, 0, (LPARAM)tempfahr);
             }
             else if (to == 2)
             {
                 CheckMenuItem(GetMenu(hwnd), ID_UNITS_KTOC, MF_CHECKED);
                 menucheck[0] = 49;
                 menucheck[1] = 51;
                 menucheck[2] = 50;
                 SendDlgItemMessage(hwnd, ID_LABEL1, WM_SETTEXT, 0, (LPARAM)kelv_to_cels);
                 SendDlgItemMessage(hwnd, ID_LABEL4, WM_SETTEXT, 0, (LPARAM)tempcel);
             }
             else { MessageBox(hwnd, "There was an error receiving your request.\nPlease restart the application.", "Error!", MB_OK | MB_ICONERROR); }
         }
         else
         {
             MessageBox(hwnd, "There was an error receiving your request.\nPlease restart the application.", "Error!", MB_OK | MB_ICONERROR);
         }
    }
    
    
    /*  This function is called by the Windows function DispatchMessage()  */
    
    LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
    {
        switch (message)                  /* handle the messages */
        {
            case WM_CREATE:
                 CreateWindowEx(0, TEXT("STATIC"), TEXT("Currently converting: "), WS_CHILD | WS_VISIBLE | SS_SIMPLE, 
                 23, 8, 134, 23, hwnd, (HMENU)ID_TEXT1, g_hInst, NULL);
                 
                 CreateWindowEx(0, TEXT("STATIC"), TEXT(""), WS_CHILD | WS_VISIBLE | SS_SIMPLE, 
                 160, 8, 150, 23, hwnd, (HMENU)ID_LABEL1, g_hInst, NULL);
                 
                 CreateWindowEx(0, TEXT("STATIC"), TEXT(""), WS_CHILD | WS_VISIBLE | SS_SIMPLE, 
                 0, 104, 130, 23, hwnd, (HMENU)ID_LABEL2, g_hInst, NULL);
                 
                 CreateWindowEx (WS_EX_CLIENTEDGE,                    /* more or 'extended' styles */
                                 TEXT("EDIT"),                        /* 'class' of control to create */
                                 TEXT(""),                            /* text displayed in the control */
                                 WS_CHILD | WS_VISIBLE | WS_BORDER,   /* how it looks */
                                 131,                                 /* control position: left */
                                 104,                                 /* control position: top */
                                 100,                                 /* control width */
                                 20,                                  /* control height */
                                 hwnd,                                /* parent window handle */
                                 (HMENU)ID_LABEL3,                                /* control's ID */
                                 g_hInst,                           /* application instance */
                                 NULL);
                                 
                 CreateWindowEx (0, TEXT("BUTTON"), TEXT("Convert"), 
                 WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 130, 144, 104, 23, hwnd, (HMENU)ID_TEXT2, g_hInst, NULL);
                 
                 CreateWindowEx(0, TEXT("STATIC"), TEXT(""), WS_CHILD | WS_VISIBLE | SS_SIMPLE, 
                 0, 208, 130, 23, hwnd, (HMENU)ID_LABEL4, g_hInst, NULL);
                 
                 CreateWindowEx(WS_EX_CLIENTEDGE, TEXT("EDIT"), TEXT(""), WS_CHILD | WS_VISIBLE | WS_BORDER, 
                 131, 208, 100, 20, hwnd, (HMENU)ID_LABEL5, g_hInst, NULL);
                 
                 CreateWindowEx(0, TEXT("BUTTON"), TEXT("Clear"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
                 130, 248, 104, 23, hwnd, (HMENU)ID_TEXT3, g_hInst, NULL);
                 
                 CreateWindowEx(0, TEXT("STATIC"), TEXT(""), WS_CHILD | SS_SIMPLE, 272, 8, 0, 16, 
                 hwnd, (HMENU)ID_LABEL6, g_hInst, NULL);
                 
                 return 0;
            break;
            case WM_COMMAND:
                 switch(LOWORD(wParam))
                 {
                     case ID_FILE_CLOSE:
                          PostMessage(hwnd, WM_CLOSE, 0, 0);
                     break;
                     case ID_UNITS_FTOC:
                          SetLabel(hwnd, one, one);
                     break;
                     case ID_UNITS_FTOK:
                          SetLabel(hwnd, one, two);
                     break;
                     case ID_UNITS_CTOF:
                          SetLabel(hwnd, two, one);
                     break;
                     case ID_UNITS_CTOK:
                          SetLabel(hwnd, two, two);
                     break;
                     case ID_UNITS_KTOF:
                          SetLabel(hwnd, three, one);
                     break;
                     case ID_UNITS_KTOC:
                          SetLabel(hwnd, three, two);
                     break;
                     case ID_HELP_ABOUT:
                          MessageBox(hwnd, "Temperature Converter 1.0a; Shibby Inc.  2005", 
                          "About...", MB_OK | MB_ICONINFORMATION);
                     break;
                     case ID_TEXT2:
                          MessageBox(hwnd, "booyah", "8-)", MB_OK);
                     break;
                     case ID_TEXT3:
                          UncheckMenu(hwnd);
                          SetDlgItemText(hwnd, ID_LABEL3, "");
                          SetDlgItemText(hwnd, ID_LABEL5, "");
                     break;            
                     }
            break;
    
    ...
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  6. #6
    Tropical Coder Darryl's Avatar
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    what you need to do is call InvalidateRect(hwnd,0,TRUE) after your call to set the text.

    You can play around with the 2nd parameter using only the rect of the static control to make it a bit more effiencient, but the above should work to refresh the entire window

    edit: change true to TRUE, forgot we are dealing with windows here, compiler will complain about the true to TRUE conversion
    Last edited by Darryl; 08-10-2005 at 01:18 PM.

  7. #7
    Shibby willc0de4food's Avatar
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    you...are freaking awesome.

    i would almost tell you i love you...but i thatd just be awkward.
    lol

    that works!
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  8. #8
    Shibby willc0de4food's Avatar
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    mmm...so, now how would i make my controls start off being disabled until an option in the menu is clicked? then once the option in the menu is clicked, it enables the controls so that the user can enter data and click the buttons?

    thanks
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  9. #9
    Even death may die... Dante Shamest's Avatar
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    Nice one, Darryl.
    I would never have guessed InvalidateRect was the problem.

    so, now how would i make my controls start off being disabled until an option in the menu is clicked? then once the option in the menu is clicked, it enables the controls so that the user can enter data and click the buttons?
    I think EnableWindow should do the trick.

  10. #10
    Tropical Coder Darryl's Avatar
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    Quote Originally Posted by Dante Shamest
    Nice one, Darryl.
    I would never have guessed InvalidateRect was the problem.



    I think EnableWindow should do the trick.
    The clue was that when he wrote new text, he was still seeing part of the old text.

  11. #11
    Shibby willc0de4food's Avatar
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    EnableWindow isn't doing it for me, unless i'm using it wrong. i've tried passing hwnd for the first parameter, and (HWND)ID_TEXT2 and the first one completely freezes the window. no alt+f4, no right clicking on it in the taskbar to close it...u must alt+ctrl+del. the second method - does nothing. lol so do am i supposed to add it in a specific area? or am i doing something wrong? thanks for the help.
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  12. #12
    Tropical Coder Darryl's Avatar
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    Quote Originally Posted by willc0de4food
    EnableWindow isn't doing it for me, unless i'm using it wrong. i've tried passing hwnd for the first parameter, and (HWND)ID_TEXT2 and the first one completely freezes the window. no alt+f4, no right clicking on it in the taskbar to close it...u must alt+ctrl+del. the second method - does nothing. lol so do am i supposed to add it in a specific area? or am i doing something wrong? thanks for the help.
    You need to pass the handle to the control, not the handle to the window. (HWND)ID_TEXT2 is just plain wrong, you can't cast the resourceid to be the handle to the control. There's 2 ways you can go about this, first when you call CreateWindowEx you could save the return value, that is the HWND you need:

    Code:
    HWND myControl = CreateWindowEx(...)
    second you can call GetDlgItem with the resource_id and get the handle

    Code:
    HWND myControl = GetDlgItem(hwnd, ID_TEXT2)
    then call enablewindow

    Code:
    EnableWindow( myControl, FALSE);
    EDIT: I guess you avoid the myControl variable by nesting:
    Code:
    EnableWindow( GetDlgItem(hwnd, ID_TEXT2), FALSE);
    Last edited by Darryl; 08-11-2005 at 07:56 AM.

  13. #13
    Shibby willc0de4food's Avatar
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    freakin sweet

    i built a new computer because i sold my previous one, but in the mean time i haven't been able to work on my program but i'm going at it now and that works like a charm thanks.
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