Button corners are not antialiased.

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  • Button corners are not antialiased.

    Hi ,

    When i am using the button widget, the borders at the corner are not anti-aliased. In order to make it anti-aliased i have handled WM_PAINT message and used GUI_AA_DrawRoundedRect() method to draw the button corners.
    But once this is done, i don't see the button pressed effect any more. I don't know how this is to be handled.

    In short i need a button with anti-aliased corners, and at the same time i need to preserve the button press effect too.
    Any help would be greatly appreciated. If you guys can provide a sample, that will be great.

    Thanks,
    NKechi

  • Hi NKechi,

    When overwriting the callback you have to react on the different states of a button, too.
    This can be done by calling BUTTON_IsPressed(pMsg->hWin). It returns 1 if the button is pressed and 0 if not.

    Another way might be to use a custom skinning routine and react on the proper commands to distinguish between the state and which part of the buttons gets drawn.

    Please take a look into the emWin user manual (UM03001_emWin5.pdf) at chapter 22 'Skinning' for more information about skinning.

    In regards of performance I would recommend to use two different bitmaps with transparency (used for soft edges) instead of using AA routines.

    Regards,
    Sven
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