private void OnModelOnMouseDown(object s, OxyMouseDownEventArgs e)
{
if (e.ChangedButton == OxyMouseButton.Left)
{
DisplaySelection();
_startx = _range.InverseTransform(e.Position).X;
_range.MinimumX = _startx;
_range.MaximumX = _startx;
_model.InvalidatePlot(true);
e.Handled = true;
}
}
public static PlotModel SelectRange()
{
var model = new PlotModel {
Title = "Select range", Subtitle = "Left click and drag to select a range."
};
model.Series.Add(new FunctionSeries(Math.Cos, 0, 40, 0.1));
var range = new RectangleAnnotation {
Fill = OxyColor.FromAColor(120, OxyColors.SkyBlue), MinimumX = 0, MaximumX = 0
};
model.Annotations.Add(range);
double startx = double.NaN;
model.MouseDown += (s, e) =>
{
if (e.ChangedButton == OxyMouseButton.Left)
{
startx = range.InverseTransform(e.Position).X;
range.MinimumX = startx;
range.MaximumX = startx;
model.InvalidatePlot(true);
e.Handled = true;
}
};
model.MouseMove += (s, e) =>
{
if (!double.IsNaN(startx))
{
var x = range.InverseTransform(e.Position).X;
range.MinimumX = Math.Min(x, startx);
range.MaximumX = Math.Max(x, startx);
range.Text = string.Format("∫ cos(x) dx = {0:0.00}", Math.Sin(range.MaximumX) - Math.Sin(range.MinimumX));
model.Subtitle = string.Format("Integrating from {0:0.00} to {1:0.00}", range.MinimumX, range.MaximumX);
model.InvalidatePlot(true);
e.Handled = true;
}
};
model.MouseUp += (s, e) =>
{
startx = double.NaN;
};
return(model);
}
public static PlotModel SelectRange()
{
var model = new PlotModel { Title = "Select range", Subtitle = "Left click and drag to select a range." };
model.Series.Add(new FunctionSeries(Math.Cos, 0, 40, 0.1));
var range = new RectangleAnnotation { Fill = OxyColor.FromAColor(120, OxyColors.SkyBlue), MinimumX = 0, MaximumX = 0 };
model.Annotations.Add(range);
double startx = double.NaN;
model.MouseDown += (s, e) =>
{
if (e.ChangedButton == OxyMouseButton.Left)
{
startx = range.InverseTransform(e.Position).X;
range.MinimumX = startx;
range.MaximumX = startx;
model.InvalidatePlot(true);
e.Handled = true;
}
};
model.MouseMove += (s, e) =>
{
if (!double.IsNaN(startx))
{
var x = range.InverseTransform(e.Position).X;
range.MinimumX = Math.Min(x, startx);
range.MaximumX = Math.Max(x, startx);
range.Text = string.Format("∫ cos(x) dx = {0:0.00}", Math.Sin(range.MaximumX) - Math.Sin(range.MinimumX));
model.Subtitle = string.Format("Integrating from {0:0.00} to {1:0.00}", range.MinimumX, range.MaximumX);
model.InvalidatePlot(true);
e.Handled = true;
}
};
model.MouseUp += (s, e) =>
{
startx = double.NaN;
};
return model;
}