Sliders in Igor Pro

A slider is a SetVariable you can drag, and it reports continuously unless told not to.

Function AddSlider()
    Slider widthSlider, pos={16, 44}, size={200, 50}
    Slider widthSlider, limits={1, 51, 2}, value=5, live=0
    Slider widthSlider, vert=0, ticks=5, proc=WidthMoved
End

Function WidthMoved(STRUCT WMSliderAction &sa) : SliderControl
    if ((sa.eventCode & 1) == 0)
        return 0
    endif

    NVAR window = root:Settings:gWindow
    window = round(sa.curval)
    Printf "window %d\r", window
    return 0
End

How it works

1. limits={low, high, increment} and variable= are the essentials.
2. live=0 waits for the mouse to come up before reporting.
3. The action's curval is the value, and eventCode says why it fired.

Keywords and builtins used here

• End
• Function
• NVAR
• Printf
• STRUCT
• Slider
• endif
• if
• proc
• return
• round
• ticks
• window

The run, in numbers

Lines

16

Characters to type

394

Tokens

105

Three-star pace

85 tpm

At the three-star pace of 85 tokens a minute, this run takes about 74 seconds.

Type this snippet

Step 5 of 5 in Values a user sets, step 8 of 18 in Panels & GUI.

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