Update Text

This site uses cookies. By continuing to browse this site, you are agreeing to our Cookie Policy.

  • Update Text

    I have made a Window with 1 Text Field and 1 Button.

    Update Text with Button works fine.

    C Source Code

    1. /*********************************************************************
    2. * *
    3. * SEGGER Microcontroller GmbH & Co. KG *
    4. * Solutions for real time microcontroller applications *
    5. * *
    6. **********************************************************************
    7. * *
    8. * C-file generated by: *
    9. * *
    10. * GUI_Builder for emWin version 5.22 *
    11. * Compiled Jul 4 2013, 15:16:01 *
    12. * (c) 2013 Segger Microcontroller GmbH & Co. KG *
    13. * *
    14. **********************************************************************
    15. * *
    16. * Internet: www.segger.com Support: support@segger.com *
    17. * *
    18. **********************************************************************
    19. */
    21. // USER START (Optionally insert additional includes)
    22. // USER END
    24. #include "DIALOG.h"
    26. /*********************************************************************
    27. *
    28. * Defines
    29. *
    30. **********************************************************************
    31. */
    32. #define ID_WINDOW_0 (GUI_ID_USER + 0x00)
    33. #define ID_TEXT_0 (GUI_ID_USER + 0x01)
    34. #define ID_BUTTON_0 (GUI_ID_USER + 0x02)
    37. // USER START (Optionally insert additional defines)
    38. // USER END
    40. /*********************************************************************
    41. *
    42. * Static data
    43. *
    44. **********************************************************************
    45. */
    47. // USER START (Optionally insert additional static data)
    48. // USER END
    50. /*********************************************************************
    51. *
    52. * _aDialogCreate
    53. */
    54. static const GUI_WIDGET_CREATE_INFO _aDialogCreate[] = {
    55. { WINDOW_CreateIndirect, "Window", ID_WINDOW_0, 0, 0, 320, 240, 0, 0x0, 0 },
    56. { TEXT_CreateIndirect, "Text", ID_TEXT_0, 103, 93, 80, 20, 0, 0x64, 0 },
    57. { BUTTON_CreateIndirect, "Button", ID_BUTTON_0, 104, 152, 80, 20, 0, 0x0, 0 },
    58. // USER START (Optionally insert additional widgets)
    59. // USER END
    60. };
    62. /*********************************************************************
    63. *
    64. * Static code
    65. *
    66. **********************************************************************
    67. */
    69. // USER START (Optionally insert additional static code)
    70. // USER END
    72. /*********************************************************************
    73. *
    74. * _cbDialog
    75. */
    76. static void _cbDialog(WM_MESSAGE * pMsg) {
    77. WM_HWIN hItem;
    78. int NCode;
    79. int Id;
    80. // USER START (Optionally insert additional variables)
    81. // USER END
    83. switch (pMsg->MsgId) {
    84. case WM_INIT_DIALOG:
    85. //
    86. // Initialization of 'Text'
    87. //
    88. hItem = WM_GetDialogItem(pMsg->hWin, ID_TEXT_0);
    89. TEXT_SetText(hItem, "Before");
    90. // USER START (Optionally insert additional code for further widget initialization)
    91. // USER END
    92. break;
    93. case WM_NOTIFY_PARENT:
    94. Id = WM_GetId(pMsg->hWinSrc);
    95. NCode = pMsg->Data.v;
    96. switch(Id) {
    97. case ID_BUTTON_0: // Notifications sent by 'Button'
    98. switch(NCode) {
    99. case WM_NOTIFICATION_CLICKED:
    100. // USER START (Optionally insert code for reacting on notification message)
    102. hItem = WM_GetDialogItem(pMsg->hWin, ID_TEXT_0);
    103. TEXT_SetText(hItem, "After Button pressed");
    106. // USER END
    107. break;
    108. case WM_NOTIFICATION_RELEASED:
    109. // USER START (Optionally insert code for reacting on notification message)
    110. // USER END
    111. break;
    112. // USER START (Optionally insert additional code for further notification handling)
    113. // USER END
    114. }
    115. break;
    116. // USER START (Optionally insert additional code for further Ids)
    117. // USER END
    118. }
    119. break;
    120. // USER START (Optionally insert additional message handling)
    121. // USER END
    122. default:
    123. WM_DefaultProc(pMsg);
    124. break;
    125. }
    126. }
    128. /*********************************************************************
    129. *
    130. * Public code
    131. *
    132. **********************************************************************
    133. */
    134. /*********************************************************************
    135. *
    136. * CreateWindow
    137. */
    138. WM_HWIN CreateWindow(void);
    139. WM_HWIN CreateWindow(void) {
    140. WM_HWIN hWin;
    142. hWin = GUI_CreateDialogBox(_aDialogCreate, GUI_COUNTOF(_aDialogCreate), _cbDialog, WM_HBKWIN, 0, 0);
    143. return hWin;
    144. }
    146. // USER START (Optionally insert additional public code)
    147. // USER END
    149. /*************************** End of file ****************************/
    Display All




    But I have no idea how a callback must looks like to do that from extern

    like

    C Source Code

    1. // USER START (Optionally insert additional public code)
    2. /***********************************************************************
    3. Update Text Field*/
    4. WM_HWIN UpdateText(void);
    5. WM_HWIN UpdateText(void) {
    6. hItem = WM_GetDialogItem(pMsg->hWin, ID_TEXT_0);
    7. TEXT_SetText(hItem, "Text changed:");
    8. }




    That allone not works, how to do it right??

    regards

    Jim