Strange Behaviour on Window Close

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Mon, 05/06/2019 - 08:20 am

I have a panel with multiple sliders that, when used, issue a command to control a Xenon lamp. The widget should be spawned & closed from a button press on another GUI (via Execute "panelName()"), however, when closing this widget with the standard Windows X button every SliderControl's function is called. This is very strange and unwanted behavior. No where in my code do I have any hook on a Windows exit so I wonder if this has happened before? And Is there a way to disable the native Windows option menu or catch the termination to abort these function calls?

 

Here's a sample SliderControl function to set the lamp intensity:

Function solarSimIntensitySliderProc(sa) : SliderControl

    STRUCT WMSliderAction &sa
    NVAR instr = $GLOBAL_PATH + ":ShutterController:SC_solarSim_instr"
    String cmd = ""
    Variable curVal

    switch ( sa.eventCode )
        default:
            if ( sa.eventCode & 1)
                curVal = sa.curval
                sprintf cmd, "P=%04g\r", (curVal * 10)
                HW_SendVISACommand(instr, cmd)
            endif
            break
    endswitch
    return 0
End

Any insight would be greatly appreciated.

try

if ( (sa.eventCode > 0) && (sa.eventCode & 1))

Each control gets a "control about to be killed" event which is sa.eventCode == -1. That will pass your if statement.

May 6, 2019 at 09:01 am - Permalink