EDIT_SetValue does not return

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  • EDIT_SetValue does not return

    Hello,

    I am using the emwin library as part of a bigger embedded application. I am experiencing a bit strange behavior:
    I am using the EDIT_Widgets to visualize some data (like current temperature, etc).

    My dialog looks like the following

    C Source Code

    1. static void _cbDialog(WM_MESSAGE * pMsg) {
    2. WM_HWIN hItem;
    3. float fDummy;
    4. fDummy = -999999999.567;
    5. switch (pMsg->MsgId) {
    6. case WM_INIT_DIALOG:
    7. vInitDialog(pMsg);
    8. break
    9. case SOME_OTHER_EVENT:
    10. vUpdateActualSetpoints( pMsg);
    11. break
    13. ...
    14. }
    16. static void vInitDialog(WM_MESSAGE * pMsg){
    17. WM_HWIN hItem;
    18. hItem = WM_GetDialogItem(pMsg->hWin, ID_EDIT_6);
    19. WIDGET_SetEffect(hItem, &WIDGET_Effect_None );
    20. EDIT_SetFloatMode(hItem, 30, 10, 50, 2, GUI_EDIT_SUPPRESS_LEADING_ZEROES);
    21. }
    22. static void vUpdateActualSetpoints(WM_MESSAGE * pMsg)
    23. {
    24. WM_HWIN hItem;
    25. float fDummy;
    26. hItem = WM_GetDialogItem(pMsg->hWin, ID_EDIT_6);
    27. fDummy = -999999999.567;
    28. EDIT_SetFloatValue( hItem, fDummy );
    29. }
    Display All

    This is a very simplified example. My problem is here, that the function "EDIT_SetFloatValue( hItem, fDummy );" in line 28 does not return. Since this functions hols a mutex in my application, it blocks every functionality that needs that mutex.

    However, if I insert "EDIT_SetFloatValue(hItem, 0);" after line 20, the program works and the function "EDIT_SetFloatValue" inside my "vUpdateActualSetpoints" does return. Also, if I change the value in line 27 to be between 10 and 50 it returns.

    Is this behaviour known and intended? Is there a way to make sure, the emWin functions do always return?

  • Hi,

    I gave it a try but on my end it is working as expected.
    If I try to set a value of -999999999.567 it shows 10 as configured.

    Which version of emWin are you using?

    Here is the application I have used for testing:

    C Source Code

    1. /*********************************************************************
    2. *
    3. * Defines
    4. *
    5. **********************************************************************
    6. */
    7. #define ID_WINDOW_0 (GUI_ID_USER + 0x00)
    8. #define ID_EDIT_0 (GUI_ID_USER + 0x01)
    9. #define ID_BUTTON_0 (GUI_ID_USER + 0x02)
    11. /*********************************************************************
    12. *
    13. * Static data
    14. *
    15. **********************************************************************
    16. */
    17. /*********************************************************************
    18. *
    19. * _aDialogCreate
    20. */
    21. static const GUI_WIDGET_CREATE_INFO _aDialogCreate[] = {
    22. { WINDOW_CreateIndirect, "Window", ID_WINDOW_0, 0, 0, 320, 240, 0, 0x0, 0 },
    23. { EDIT_CreateIndirect, "Edit", ID_EDIT_0, 87, 101, 137, 47, 0, 0x64, 0 },
    24. { BUTTON_CreateIndirect, "Set Value", ID_BUTTON_0, 50, 45, 80, 20, 0, 0x0, 0 },
    25. };
    27. /*********************************************************************
    28. *
    29. * Static code
    30. *
    31. **********************************************************************
    32. */
    33. /*********************************************************************
    34. *
    35. * _cbDialog
    36. */
    37. static void _cbDialog(WM_MESSAGE * pMsg) {
    38. WM_HWIN hItem;
    39. int NCode;
    40. int Id;
    41. float Value;
    43. switch (pMsg->MsgId) {
    44. case WM_INIT_DIALOG:
    45. //
    46. // Initialization of 'Edit'
    47. //
    48. hItem = WM_GetDialogItem(pMsg->hWin, ID_EDIT_0);
    49. WIDGET_SetEffect(hItem, &WIDGET_Effect_None );
    50. EDIT_SetText(hItem, "123");
    51. EDIT_SetTextAlign(hItem, GUI_TA_HCENTER | GUI_TA_VCENTER);
    52. EDIT_SetFont(hItem, GUI_FONT_20_1);
    53. EDIT_SetFloatMode(hItem, 30, 10, 50, 2, GUI_EDIT_SUPPRESS_LEADING_ZEROES);
    54. break;
    55. case WM_NOTIFY_PARENT:
    56. Id = WM_GetId(pMsg->hWinSrc);
    57. NCode = pMsg->Data.v;
    58. switch(Id) {
    59. case ID_BUTTON_0: // Notifications sent by 'Set Value'
    60. switch(NCode) {
    61. case WM_NOTIFICATION_RELEASED:
    62. hItem = WM_GetDialogItem(pMsg->hWin, ID_EDIT_0);
    63. Value = -999999999.567f;
    64. EDIT_SetFloatValue(hItem, Value);
    65. break;
    66. }
    67. break;
    68. }
    69. break;
    70. default:
    71. WM_DefaultProc(pMsg);
    72. break;
    73. }
    74. }
    76. /*********************************************************************
    77. *
    78. * MainTask
    79. */
    80. void MainTask(void) {
    81. WM_HWIN hWin;
    83. GUI_Init();
    84. GUI_CreateDialogBox(_aDialogCreate, GUI_COUNTOF(_aDialogCreate), _cbDialog, WM_HBKWIN, 0, 0);
    85. while (1) {
    86. GUI_Delay(100);
    87. }
    88. }
    Display All


    Regards
    Sven
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