/// <summary>
/// Zooming into the chart
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void textCanvas_MouseWheel(object sender, MouseWheelEventArgs e)
{
if (IsBubbleChart)
{
return;
}
double delta = e.Delta;
Point a = Mouse.GetPosition(chartCanvas);
Point max = cs.NormalizePoint(new Point(Xmax, Ymax));
Point min = cs.NormalizePoint(new Point(Xmin, Ymin));
double diffX = Math.Round((cs.Xmax - cs.Xmin) / 12, 15);
double diffY = Math.Round((cs.Ymax - cs.Ymin) / 12, 15);
double posRelativeX = 0;
double posRelativeY = 0;
try
{
posRelativeX = Math.Abs(max.X - a.X) / Math.Abs(min.X - a.X);
posRelativeY = Math.Abs(max.Y - a.Y) / Math.Abs(min.Y - a.Y);
}
catch
{
}
if (delta > 0)
{
Xmax -= diffX * (IsXLog ? Math.Pow(10, 1 / posRelativeX) : posRelativeX);
Xmin += diffX / (IsXLog ? diffX : posRelativeX) * (IsXLog ? Xmin / 8 : 1);
Ymax -= diffY * (IsYLog ? Math.Pow(10, 1 / posRelativeY) : posRelativeY);
Ymin += diffY / (IsYLog ? diffY : posRelativeY) * (IsYLog ? Ymin / 8 : 1);
}
else
{
Xmax += diffX * (IsXLog ? Math.Pow(10, 1 / posRelativeX) : posRelativeX);
Xmin -= diffX / (IsXLog ? diffX : posRelativeX) * (IsXLog ? Xmin / 8 : 1);
Ymax += diffY * (IsYLog ? Math.Pow(10, 1 / posRelativeY) : posRelativeY);
Ymin -= diffY / (IsYLog ? diffY : posRelativeY) * (IsYLog ? Ymin / 8 : 1);
}
drawing = ResizeChart();
}
