Button press required twice to update values

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I have some plot update code to alter the axis limits that takes two button pushes to update the variables I'm using to store the axis limit values.

The plot updates on the first button push. The variables xrdYAxisMin and xrdYAxisMax don't update until I push the button again.

I want to track the values of the axes so I can do other things with them.

What am I doing wrong?

A minimised version of the code is:
//---------------------------------------------------------------------------

function updateCWTWindowProc(ctrlName) : ButtonControl
    String ctrlName

    NVAR xAxisMin   =root:Packages:PeakPanelFolder:xAxisMin
    NVAR xAxisMax   =root:Packages:PeakPanelFolder:xAxisMax
    NVAR xrdYAxisMin =root:Packages:PeakPanelFolder:xrdYAxisMin
    NVAR xrdYAxisMax =root:Packages:PeakPanelFolder:xrdYAxisMax
   

    //Data window
    SetActiveSubwindow PeakPanel#G1

    SetAxis/A=2 //autoscales the Y axis to match the values in the current X range
    SetAxis bottom xAxisMin,xAxisMax
    GetAxis /Q left
    xrdYAxisMin = V_min
    xrdYAxisMax = V_max

end

//---------------------------------------------------------------------------



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Full code for the button if I mangle the above:
//---------------------------------------------------------------------------

function updateCWTWindowProc(ctrlName) : ButtonControl
    String ctrlName

    Variable autoScaleInt=0
    ControlInfo/W=PeakPanel peakAutoScaleIntCheck
    if(V_Value)
        autoScaleInt=1
    endif

    NVAR cwtColour  =root:Packages:PeakPanelFolder:cwtColour

    NVAR xAxisMin   =root:Packages:PeakPanelFolder:xAxisMin
    NVAR xAxisMax   =root:Packages:PeakPanelFolder:xAxisMax
    NVAR xrdYAxisMin =root:Packages:PeakPanelFolder:xrdYAxisMin
    NVAR xrdYAxisMax =root:Packages:PeakPanelFolder:xrdYAxisMax
    NVAR cwtYAxisMin =root:Packages:PeakPanelFolder:cwtYAxisMin
    NVAR cwtYAxisMax =root:Packages:PeakPanelFolder:cwtYAxisMax
   
    //CWT window
    SetActiveSubwindow PeakPanel#G0
    ModifyImage M_CWT ctab= {-cwtColour,cwtColour,RedWhiteBlue,0}
    SetAxis bottom xAxisMin,xAxisMax
    SetAxis left cwtYAxisMin, cwtYAxisMax

    //Data window
    SetActiveSubwindow PeakPanel#G1

    if(autoScaleInt)
        SetAxis/A=2 //autoscales the Y axis to match the values in the current X range
        SetAxis bottom xAxisMin,xAxisMax
        GetAxis  left
        xrdYAxisMin = V_min
        xrdYAxisMax = V_max
    else
        //Need a way to preserve the values that I already have
        SetAxis /A //clears any previous autoscaling
        SetAxis left xrdYAxisMin, xrdYAxisMax
        SetAxis bottom xAxisMin,xAxisMax
    endif
   
       
    SetActiveSubwindow PeakPanel
       
end

//---------------------------------------------------------------------------
The problem probably is that you call GetAxis before the update happens (which is after the function ends). You need to force the graph (and with it the axis range) to update before fetching the new values with GetAxis (or else you will get the old ones). Squeeze a DoUpdate in before and you should be good to go. By the way, you don't use GetAxis/Q not litter the history window?

September 2, 2015 at 06:57 pm - Permalink

Gah! DoUpdate works a charm.

Quote:
GetAxis/Q not litter the history window?

Yes it does litter, but I was trying to debug, so I wanted the rubbish. /Q is now inserted.

September 2, 2015 at 08:45 pm - Permalink