private static void UpdateChartHorizontalPanOffsetAndZoom(RadChartBase chart)
{
if (ChartViewUtilities.GetIsHorizontalRangeEnabled(chart) && !suspendedCharts.Contains(chart))
{
suspendedCharts.Add(chart);
if (chart.PlotAreaClip.Width > 0)
{
double horizontalStart = ChartViewUtilities.GetHorizontalStart(chart);
double horizontalEnd = ChartViewUtilities.GetHorizontalEnd(chart);
double horizontalRange = horizontalEnd - horizontalStart;
if (horizontalRange > 0 && horizontalRange <= 1)
{
double newZoomX = 1 / horizontalRange;
double virtualWidth = newZoomX * chart.PlotAreaClip.Width;
double panOffsetX = -horizontalStart * virtualWidth;
chart.Zoom = new Size(newZoomX, chart.Zoom.Height);
chart.PanOffset = new Point(panOffsetX, chart.PanOffset.Y);
}
}
suspendedCharts.Remove(chart);
}
}
private static void UpdateHorizontalRangeValues(RadChartBase chart)
{
if (ChartViewUtilities.GetIsHorizontalRangeEnabled(chart) && !suspendedCharts.Contains(chart))
{
suspendedCharts.Add(chart);
var virtualWidth = chart.PlotAreaClip.Width * chart.Zoom.Width;
if (virtualWidth > 0)
{
double oldHorizontalStart = ChartViewUtilities.GetHorizontalStart(chart);
double oldHorizontalEnd = ChartViewUtilities.GetHorizontalEnd(chart);
double newHorizontalStart = (-chart.PanOffset.X) / virtualWidth;
double newHorizontalEnd = ((-chart.PanOffset.X) + chart.PlotAreaClip.Width) / virtualWidth;
ChartViewUtilities.SetHorizontalStart(chart, newHorizontalStart);
ChartViewUtilities.SetHorizontalEnd(chart, newHorizontalEnd);
}
suspendedCharts.Remove(chart);
}
}
