Nevron Forum

How to raise event for the red dot to the left side of the scroll bar if NDataZoomTool is enabled

https://www.nevron.com/Forum/Topic6192.aspx

By Enjoyear Guo - Thursday, March 1, 2012

Hi,

Can you see the chart in the attachment. See the red dot in the lower left corner?
How can I fire a event if I click on that dot?
Many thanks!

Best,
Enjoyear
By Nevron Support - Thursday, March 1, 2012

Hi Enjoyear

Check the axis Reset event.
By Enjoyear Guo - Thursday, March 1, 2012

Sorry, I didn't state clearly. I can click that red dot for many times. How can I tell it's the last time that it's clicked. I mean after the last time, the whole scrolling bar will disappear and the chart will present everything. How can I raise an event for that?
Thank you.
By Nevron Support - Thursday, March 1, 2012

Hi Enjoyear,

You can specify a different reset mode:

chart.Axis(StandardAxis.PrimaryY).PagingView.ResetMode = PagingViewResetMode.View;

for example will go back to unzoomed view directly - will that work?
By Enjoyear Guo - Friday, March 2, 2012

I add those to my codes:
m_Chart.Axis(StandardAxis.PrimaryX).PagingView.ResetMode = PagingViewResetMode.View;
m_Chart.Axis(StandardAxis.PrimaryY).PagingView.ResetMode = PagingViewResetMode.View;
But it still goes back to the previous zoomed view one by one, not directly back to the unzoomed view. Anyway, I don't care too much about this problem. Actually, I want to maintain the default PagingViewResetMode(to go back step by step). What I need is a way to distinguish whether current view is just one level above the unzoomed view, so that I could write codes to do something(e.g. to change the view of Y axis) when the user goes back to the unzoomed view.
Thank you.
By Nevron Support - Monday, March 5, 2012

Hi Enjoyear,

Currently you cannot get the internal list of previously zoomed ranges - we've just added a property that enables you to do so in the next release of the control, which we'll release very soon.

When Reset mode is set to PagingViewResetMode.View you should go back immediately to unzoomed mode - most likely you modify the paging view somewhere else in the code. We just tested with the Interactivity\Tools\Axis Scroll Tool example and it was working correctly.
By Enjoyear Guo - Thursday, March 15, 2012

Hi experts:

I found the problem why it cannot go back directly to the unzoomed view even though I've set
m_Chart.Axis(StandardAxis.PrimaryX).PagingView.ResetMode = PagingViewResetMode.View;

This feature cannot exist with m_Chart.Axis(StandardAxis.PrimaryX).PagingView at the same time. Even if I have set m_Chart.Axis(StandardAxis.PrimaryX).PagingView.Enabled = false. It still cannot go back directly.
The only way I can do is to make m_Chart.Axis(StandardAxis.PrimaryX).PagingView = null.

I think you need to do something about it in your next release. Thank you.

Enjoyear