Problem with scrolling

[Bolik]

I created the simple application. It creates collection of some objects and displays them using RadChart.
Here is the source code:

    public partial class MainPage : UserControl
    {
        private ObservableCollection<ChartEntry> m_ChartEntries;
 
        public MainPage()
        {
            InitializeComponent();
 
            m_ChartEntries = new ObservableCollection<ChartEntry>();
            for (int i = 0; i < 20; i++)
            {
                m_ChartEntries.Add(new ChartEntry { XValue = i, YValue = 10 });
                m_ChartEntries.Add(new ChartEntry { XValue = i + 0.5, YValue = 20 });
            }
 
            radChart.ItemsSource = m_ChartEntries;
 
            radChart.DefaultView.ChartArea.AxisX.AutoRange = false;
            radChart.DefaultView.ChartArea.AxisX.MinValue = 1;
            radChart.DefaultView.ChartArea.AxisX.MaxValue = m_ChartEntries.Count;
            radChart.DefaultView.ChartArea.AxisX.Step = 1; // The Step is 1
        }
    }

The data are displayed correctly and Step is 1 (please note that AutoRange=false and Step is specified).

Afterwards I tried to add horizontal scroll bar. I added the next code:

            radChart.DefaultView.ChartArea.ZoomScrollSettingsX.RangeStart = 0;
            radChart.DefaultView.ChartArea.ZoomScrollSettingsX.RangeEnd = 0.25;
            radChart.DefaultView.ChartArea.ZoomScrollSettingsX.ScrollMode = ScrollMode.ScrollOnly;

After adding scroll bar I have found the problem - now the data are displayed with the step 0.5 (please see the attached file). Why? How to solve this problem?

Many thanks.

[Ves]

Hi Bolik,

RadChart scales the step when it is zoomed in/out, so that the number of items along X axis remains reasonable. In order to avoid this behavior in this case you can set the Step property directly to 4.

Best regards,
Ves
the Telerik team