How to Synchronize X Axis of Selected Panes in Zedgraph?

Question

I'm trying to synchronize X-Axis of selected panes in the Zedgraph,

Currently I've three panes:

with the help of the follwoing property I can synchronize X-Axis of all the available panes:

zedGraphControl1.IsSynchronizeXAxes = true;

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but I want to synchronize just Pane-1 & Pane-3, is it possible?

Many Thanks for your time...:)

Answer 1

1. List item

Yes it is.

Basically, you have to hook to the ZoomEvent, then catch the pane which has been panned or zoomed, using FindPane, apply its Scale Min and Max properties to the others, then do an AxisChange if some other Scale properties are set to Auto.

Assuming the GraphPane object you want to exclude is excludedGraphPane

void zedGraphControl1_ZoomEvent(ZedGraph.ZedGraphControl z, ZedGraph.ZoomState oldState, ZedGraph.ZoomState newState)
{
    GraphPane pane;

    using (var g = z.CreateGraphics())
        pane = z.MasterPane.FindPane(z.PointToClient(MousePosition));

    // The excludedGraphPane has to remain independant
    if (pane == null || pane == excludedGraphPane)
        return;

    foreach (var gp in z.MasterPane.PaneList)
    {
        if (gp == pane || gp == excludedGraphPane)
            continue;

        gp.XAxis.Scale.Min = pane.XAxis.Scale.Min;
        gp.XAxis.Scale.Max = pane.XAxis.Scale.Max;
        gp.AxisChange(); // Only necessary if one or more scale property is set to Auto.
    }

    z.Invalidate();
}

Of course, because the synchronization is done manually now, you need to set

zedGraphControl1.IsSynchronizeXAxes = false;