Keyboard focus

[Jason D]

I want to zoom and pan the chart using the keyboard with the plus/minus and cursor keys. This works for the Map Control. However, I'm unable to use the mouse to set the focus on the chart to receive keys. I can tab to the chart, not clicking the mouse does not work and the focus remains on the currently focused element.

[Martin Ivanov]

Hello Jason,

In WPF mostly controls that you can interact with (like TextBox or Button) are automatically focused on click. To allow this with the chart control, you can manually call its Focus method on MouseLeftButtonDown.

  private void RadCartesianChart_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
  {
      var chart = (RadCartesianChart)sender;
      chart.Focus();
  }

Regards,
Martin Ivanov
Progress Telerik

[Jason D]

Thanks, that seems to work. However, I'm struggling to control the panning with the keyboard. Ideally, using the cursor arrow keys would pan the chart the same amount as clicking the arrows on a scroll bar. I can find the PanZoomBar of an axis, but the Value is 0, even after zooming in. I had hoped to adjust the Value in increments of SmallChange.

For Zooming, I use the plus/minus keys to adjust the Zoom property by incremements of 1. Ideally this would match the zoom increment when using the mouse wheel, but I'm not sure how to do that.

[Martin Ivanov]

To adjust the panning, you can set the PanOffset property of the chart control.