Degree symbol in GUI Builder

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    • Degree symbol in GUI Builder

      I want a Text label that reads degreesC - symbol, not the word degree. The only way I've found to do it is to copy a degree symbol from Character Map and then size the Text widget accordingly, then overwrite the degree symbol with \260, leaving me with a Text label reading "\260C" (can't do this with hex, only octal) so of course it looks rubbish in GUI Builder (but ok at run time.) Is there a better way to do this?

    • Hello,

      there is only support of the base ASCII set in text editable parameters of the widgets in GUIBuilder.

      The only thing you can do is generate the degree symbol as '°' in a text editor with extended symbols support (for example, in Word) and then paste it to the field "Content" of the text widget in GUIBuilder.

      Alex.

    • Hi,

      the proper way is to use UTF8 encoding.

      As LexaGB already said the GUIBuilder supports only the ASCII range.

      You have to set other strings manually. After GUI_Init() call GUI_SetEncodeUTF8() to enable UTF8 encoding.

      C Source Code

      1. GUI_Init();
      2. GUI_UC_SetEncodeUTF8();

      When setting a string to the TEXT widget you have to pass an UTF8 encoded string.

      C Source Code

      1. hItem = WM_GetDialogItem(pMsg->hWin, ID_TEXT_0);
      2. TEXT_SetText(hItem, "\xc2\xb0""C");

      You can use the tool U2C.exe to convert a txt file (it has to be saved with UTF8 encoding without BOM) into a c-file with the UTF8 string.

      More information can be found in the emWin user manual chapter 32.1.1 UTF-8 encoding.

      Here is an example:

      C Source Code

      1. #include "DIALOG.h"
      3. /*********************************************************************
      4. *
      5. * Externals
      6. *
      7. **********************************************************************
      8. */
      10. /*********************************************************************
      11. *
      12. * Types
      13. *
      14. **********************************************************************
      15. */
      17. /*********************************************************************
      18. *
      19. * Defines
      20. *
      21. **********************************************************************
      22. */
      23. #define ID_WINDOW_0 (GUI_ID_USER + 0x00)
      24. #define ID_TEXT_0 (GUI_ID_USER + 0x01)
      26. /*********************************************************************
      27. *
      28. * Static data
      29. *
      30. **********************************************************************
      31. */
      32. /*********************************************************************
      33. *
      34. * _aDialogCreate
      35. */
      36. static const GUI_WIDGET_CREATE_INFO _aDialogCreate[] = {
      37. { WINDOW_CreateIndirect, "Window", ID_WINDOW_0, 0, 0, 320, 240, 0, 0x0, 0 },
      38. { TEXT_CreateIndirect, "Text", ID_TEXT_0, 20, 20, 80, 20, 0, 0x64, 0 },
      39. };
      41. /*********************************************************************
      42. *
      43. * Static code
      44. *
      45. **********************************************************************
      46. */
      47. /*********************************************************************
      48. *
      49. * _cbDialog
      50. */
      51. static void _cbDialog(WM_MESSAGE * pMsg) {
      52. WM_HWIN hItem;
      54. switch (pMsg->MsgId) {
      55. case WM_INIT_DIALOG:
      56. //
      57. // Initialization of 'Text'
      58. //
      59. hItem = WM_GetDialogItem(pMsg->hWin, ID_TEXT_0);
      60. TEXT_SetText(hItem, "\xc2\xb0""C");
      61. break;
      62. default:
      63. WM_DefaultProc(pMsg);
      64. break;
      65. }
      66. }
      68. /*********************************************************************
      69. *
      70. * _cbBk
      71. */
      72. static void _cbBk(WM_MESSAGE * pMsg) {
      73. switch (pMsg->MsgId) {
      74. case WM_PAINT:
      75. GUI_SetBkColor(GUI_BLACK);
      76. GUI_Clear();
      77. break;
      78. default:
      79. WM_DefaultProc(pMsg);
      80. break;
      81. }
      82. }
      84. /*********************************************************************
      85. *
      86. * Public code
      87. *
      88. **********************************************************************
      89. */
      90. /*********************************************************************
      91. *
      92. * MainTask
      93. */
      94. void MainTask(void) {
      95. GUI_Init();
      96. GUI_UC_SetEncodeUTF8();
      97. WM_MULTIBUF_Enable(1);
      98. WM_SetCallback(WM_HBKWIN, _cbBk);
      99. GUI_CreateDialogBox(_aDialogCreate, GUI_COUNTOF(_aDialogCreate), _cbDialog, WM_HBKWIN, 0, 0);
      100. while (1) {
      101. GUI_Delay(100);
      102. }
      103. }
      105. /*************************** End of file ****************************/
      Display All
      Regards,
      Sven
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    • Thanks both.

      Sven: I more-or-less tried this approach with the generated C file to set the Text widget, although I used octal rather than hex - I learnt something today from the use of hex in your code above! I did know how to do it in code - and when I tried, I didn't need to set anything to UTF-8 as the font used supported the character.

      I rather suspected that I would need to do it manually if necessary, I just thought I'd check as I'm new to emWin. The approach I tried, by setting the text to "\260C" in GUI Builder works at run-time and if it only supports ASCII fonts then that's not surprising.

      Thanks

      Andrew