scroll bar in waveformGraph

[cm2009]

How to add the scroll bar in the waveformGraph display (Measurement Studio, C#) in order to let user view the previous waveform?

[Pipo]

I dont know if there is a simple way for adding a scrollbar to a graph. You can just play with your graph :

protected void ScrollBarValueChangedEventHandler( object sender, System.EventArgs e )
{
// compute the new range

_xAxis.Range = new NationalInstruments.UI.Range( rangeMinimum, rangeMaximum );
}

I wanted to send you my own code but I playing with zooms and dynamic / static modes (the points are charted while the range does not move and the scollbar auto updates his size) so it is... quite hard to understand 🙂

gl !


Pipo

[bilalD]

Check out this thread for some more ideas.

You can create a user control that has the waveformgraph and a scrollbar on there. And change the range according to the scrolling. This way, the scroll bar will look native to the graph.

Hope this helps

[Abhishek Ghuwalewala]

You can also view the previous waveforms by panning the plot area of the graph. To enable panning set the InteractionMode property to PanX and PanY. At run-time, you can then hold the Control (CTRL) key down in the plot area while dragging the mouse to accomplish panning.

[cm2009]

Thanks for the info!

Could you provide some sample program (eg. have the scroll bar in the dynamic chart - changing data Vs time)???

[Caroline Bright]

Hello,

Here is an example of how to add scrollbars to your application. The example uses a vertical scrollbar added to the graph to scroll through the y data. Take a look at this example and

[cm2009]

I have tried to use this sample.

If I want to have the horizontal scrollbar, what's the difference in the code?

Also, as incorporated the userControl cs class into the program, it run, then it has the error in the line, the line of coding, as follows:

WaveformGraph waveformGraph = userControl11.waveformGraph1;

Don't know why contained some errors, pls kindly advise.

Thx!