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Multiple Y Axis and Scrollbars/Zooming

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Ulrich
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Ulrich asked on 15 Oct 2010, 12:41 PM
Hello Telerik Team,

I am currently implementing a WPF RadChart and I am very impressed, but I have one slight problem.

I am using multiple Y-Axis, up to five, and I need the zooming an scrolling feature, as I have to visualize long term data.
I am currently facing two problems:

1) Even when completely zoomed out, I have Scrollbars drawn at each axis, minimzing the screen region for the graph.

2) Every Y-Axis draws a scrollbar. As they all are synchronized anyway, I would like to hide the scrollbards of the additional Y Axis, as this also reduces the graph screen region.

Currently, I am loosing a huge amount of screen real estate to the scrollbars. Is there any way to control the visibility of the bars at each axis? I couldn't find something in the documentation about this.

best regards

Ulrik

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Evgeni "Zammy" Petrov
Telerik team
answered on 20 Oct 2010, 11:55 AM
Hi Ulrich,

 Thank you for contacting us.
You made a very good point there and we are considering removing the additional scrollbars all together.
Currently though I can offer you a workaround to get around this :

this.LayoutUpdated += new EventHandler(MainPage_LayoutUpdated);

bool
onlyTheFirstTime = false;
void MainPage_LayoutUpdated(object sender, EventArgs e)
{
    if (onlyTheFirstTime)
        return;
 
    onlyTheFirstTime = true;
 
    var axisContainer = this.ChildrenOfType<Telerik.Windows.Controls.Charting.AdditionalAxes2DContainer>()
        .Where(container => container.Name == "PART_AdditionalVerticalAxesPanel")
        .First();
 
    foreach (var item in axisContainer.ChildrenOfType<RadSlider>())
        item.Visibility = System.Windows.Visibility.Collapsed;
}

The snippet walks the visual tree , finds the panel where the addition  vertical axes are and collapses them. There we have a flag to make sure it is not done on each layout.

Let me know how this worked for you.

Regards,
Evgeni "Zammy" Petrov
the Telerik team
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Ulrich Witschaß
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answered on 22 Oct 2010, 05:16 PM
Works like a charm, many thanks!

While talking about the Y-Axis, there is one feature request I got from testers:

In Charts with many Y-Axis, it would of great help to link the interaction features of the series with the Y-Axis it is mapped against, basically dimming/hiding the other Y-Axis. It would make it easier for users to find the Axis the series belongs to.

best regards

Ulrik
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Evgeni "Zammy" Petrov
Telerik team
answered on 27 Oct 2010, 10:13 AM
Hello Ulrich WitschaƟ,

 Thank you very much for that suggestion! I have logged it into PITS, you can find it here.

All the best,
Evgeni "Zammy" Petrov
the Telerik team
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Ulrich
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Evgeni "Zammy" Petrov
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Ulrich Witschaß
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