LED tristate

[sonotk]

How to set LED indicator to three colors? Dark green (default), Green (Off) and RED (ON).

No callback used, only postUI message to set the led to on or off state.

Thanks.

[Wolfgang · Accepted solution]

Hi,

you almost gave the answer yourself : I see two possibilities:

1) Use SetCtrlAttribute (, , ATTR_DFLT_VALUE, ); SetCtrlAttribute (, , ATTR_OFF_COLOR, ); or SetCtrlAttribute (, , ATTR_ON_COLOR, );

2) Since you are using the LED as indicator I see no functional difference between ON and OFF, so you could define your own function SetLEDState ( 0 / 1 / 2 ) where you simply change the ON color depending on your state, something like

int SetLEDState ( int panel, int control, int state )

{
    switch ( state ) 

    {
        case 0:

            color = VAL_DK_GREEN;

            break;    

        case 1:

            color = VAL_GREEN;

            break;

        case 2:

            color = VAL_RED;

            break;

     }

     SetCtrlAttribute ( panel, control, ATTR_ON_COLOR, color );

}

[RobertoBozzolo]

Another alternative is to use a picture ring loaded with three LED images with the proper colors and associated values: the desired color can then be obtained with a simple SetCtrlVal (panelHandle, PANEL_LED, color); call