CHECKBOX custom checked state

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  • CHECKBOX custom checked state

    Hi,

    I'm using the emWin simulator and want to have a checkbox with a custom checked state. I've tried CHECKBOX_SetImage and CHECKBOX_SetDefaultImage but I keep getting the standard checked image. Does the simulator show custom checkbox images and, if so, any idea why my check image is not overriding the standard image ?

    Thanks
    Dave

  • Hi Dave,

    When using a precompiled library the default look of the widgets is set to use the FLEX_SKIN. Unfortunately this makes some functions obsolete ,and CHECKBOX_SetImage() is one of those.

    But you can set a custom skinning routine which handles the drawing of the widgets.

    Attached is a quick sample which shows how to draw a custom bitmap in the checkbox. You can find more information about skinning in the emWin user manual (UM03001_emWin5.pdf) in chapter 22 'Skinning'.

    Regards,
    Sven
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  • If you are wanting to skin the whole checkbox button not just the checkmark using two different bitmaps. You will need to draw the unchecked bitmap in the WIDGET_ITEM_DRAW_BUTTON case.

    C Source Code

    1. int CHECKBOX_DrawCustomSkin(const WIDGET_ITEM_DRAW_INFO * pDrawItemInfo)
    2. {
    3. switch (pDrawItemInfo->Cmd)
    4. {
    5. case WIDGET_ITEM_DRAW_BUTTON:
    6. GUI_DrawBitmap(&bmcheckboxUnchecked,0,0);
    7. break;
    9. case WIDGET_ITEM_DRAW_BITMAP:
    10. GUI_DrawBitmap(&bmcheckboxChecked,0,0);
    11. break;
    13. default:
    14. return CHECKBOX_DrawSkinFlex(pDrawItemInfo);
    15. }
    17. return 0;
    18. }
    Display All