/// <summary>
/// Returns the elements that are hit at the specified position.
/// </summary>
/// <param name="args">The hit test arguments.</param>
/// <returns>
/// A sequence of hit results.
/// </returns>
public IEnumerable <HitTestResult> HitTest(HitTestArguments args)
{
foreach (var element in this.GetHitTestElements())
{
var result = element.HitTest(args);
if (result != null)
{
yield return(result);
}
}
}
/// <summary>
/// Returns the elements that are hit at the specified position.
/// </summary>
/// <param name="args">The hit test arguments.</param>
/// <returns>
/// A sequence of hit results.
/// </returns>
public IEnumerable<HitTestResult> HitTest(HitTestArguments args)
{
foreach (var element in this.GetHitTestElements())
{
var result = element.HitTest(args);
if (result != null)
{
yield return result;
}
}
}
/// <summary>
/// Returns the elements that are hit at the specified position.
/// </summary>
/// <param name="args">The hit test arguments.</param>
/// <returns>
/// A sequence of hit results.
/// </returns>
public IEnumerable <HitTestResult> HitTest(HitTestArguments args)
{
// Revert the order to handle the top-level elements first
foreach (var element in this.GetElements().Reverse())
{
var uiElement = element as UIElement;
if (uiElement == null)
{
continue;
}
var result = uiElement.HitTest(args);
if (result != null)
{
yield return(result);
}
}
}
/// <summary>
/// Handles the touch started event.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">A <see cref="OxyPlot.OxyTouchEventArgs" /> instance containing the event data.</param>
public virtual void HandleTouchStarted(object sender, OxyTouchEventArgs e)
{
var args = new HitTestArguments(e.Position, MouseHitTolerance);
foreach (var result in this.HitTest(args))
{
result.Element.OnTouchStarted(e);
if (e.Handled)
{
this.currentTouchEventElement = result.Element;
return;
}
}
if (!e.Handled)
{
this.OnTouchStarted(sender, e);
}
}
/// <summary>
/// Returns the elements that are hit at the specified position.
/// </summary>
/// <param name="args">The hit test arguments.</param>
/// <returns>
/// A sequence of hit results.
/// </returns>
public IEnumerable<HitTestResult> HitTest(HitTestArguments args)
{
// Revert the order to handle the top-level elements first
foreach (var element in this.GetElements().Reverse())
{
var uiElement = element as UIElement;
if (uiElement == null)
{
continue;
}
var result = uiElement.HitTest(args);
if (result != null)
{
yield return result;
}
}
}
/// <summary>
/// Handles the mouse down event.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="OxyPlot.OxyMouseEventArgs" /> instance containing the event data.</param>
public virtual void HandleMouseDown(object sender, OxyMouseDownEventArgs e)
{
var args = new HitTestArguments(e.Position, MouseHitTolerance);
foreach (var result in this.HitTest(args))
{
e.HitTestResult = result;
result.Element.OnMouseDown(e);
if (e.Handled)
{
this.currentMouseEventElement = result.Element;
return;
}
}
if (!e.Handled)
{
this.OnMouseDown(sender, e);
}
}
public static Example ClickingOnAnAnnotation()
{
var plotModel = new PlotModel { Title = "Clicking on an annotation", Subtitle = "Click on the rectangles" };
plotModel.Axes.Add(new LinearAxis { Position = AxisPosition.Bottom });
plotModel.Axes.Add(new LinearAxis { Position = AxisPosition.Left });
var annotation1 = new RectangleAnnotation { Fill = OxyColors.Green, Text = "RectangleAnnotation 1", MinimumX = 25, MaximumX = 75, MinimumY = 20, MaximumY = 40 };
plotModel.Annotations.Add(annotation1);
var annotation2 = new RectangleAnnotation { Fill = OxyColors.SkyBlue, Text = "RectangleAnnotation 2", MinimumX = 25, MaximumX = 75, MinimumY = 60, MaximumY = 80 };
plotModel.Annotations.Add(annotation2);
EventHandler<OxyMouseDownEventArgs> handleMouseClick = (s, e) =>
{
plotModel.Subtitle = "You clicked " + ((RectangleAnnotation)s).Text;
plotModel.InvalidatePlot(false);
};
annotation1.MouseDown += handleMouseClick;
annotation2.MouseDown += handleMouseClick;
var controller = new PlotController();
var handleClick = new DelegatePlotCommand<OxyMouseDownEventArgs>(
(v, c, e) =>
{
var args = new HitTestArguments(e.Position, 10);
var firstHit = v.ActualModel.HitTest(args).FirstOrDefault(x => x.Element is RectangleAnnotation);
if (firstHit != null)
{
e.Handled = true;
plotModel.Subtitle = "You clicked " + ((RectangleAnnotation)firstHit.Element).Text;
plotModel.InvalidatePlot(false);
}
});
controller.Bind(new OxyMouseDownGesture(OxyMouseButton.Left), handleClick);
return new Example(plotModel, controller);
}
/// <summary>
/// Tests if the plot element is hit by the specified point.
/// </summary>
/// <param name="args">The hit test arguments.</param>
/// <returns>
/// A hit test result.
/// </returns>
public HitTestResult HitTest(HitTestArguments args)
{
return(this.HitTestOverride(args));
}
/// <summary>
/// When overridden in a derived class, tests if the plot element is hit by the specified point.
/// </summary>
/// <param name="args">The hit test arguments.</param>
/// <returns>
/// The result of the hit test.
/// </returns>
protected virtual HitTestResult HitTestOverride(HitTestArguments args)
{
return(null);
}
/// <summary>
/// Handles the mouse down event.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="OxyPlot.OxyMouseEventArgs" /> instance containing the event data.</param>
public virtual void HandleMouseDown(object sender, OxyMouseDownEventArgs e)
{
var args = new HitTestArguments(e.Position, MouseHitTolerance);
foreach (var result in this.HitTest(args))
{
e.HitTestResult = result;
result.Element.OnMouseDown(e);
if (e.Handled)
{
this.currentMouseEventElement = result.Element;
return;
}
}
if (!e.Handled)
{
this.OnMouseDown(sender, e);
}
}
/// <summary>
/// Handles the touch started event.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">A <see cref="OxyPlot.OxyTouchEventArgs" /> instance containing the event data.</param>
public virtual void HandleTouchStarted(object sender, OxyTouchEventArgs e)
{
var args = new HitTestArguments(e.Position, MouseHitTolerance);
foreach (var result in this.HitTest(args))
{
result.Element.OnTouchStarted(e);
if (e.Handled)
{
this.currentTouchEventElement = result.Element;
return;
}
}
if (!e.Handled)
{
this.OnTouchStarted(sender, e);
}
}
protected override HitTestResult HitTestOverride(HitTestArguments args) {
return Points.Count < 2 ? null : base.HitTestOverride(args);
}
/// <summary>
/// Tests if the plot element is hit by the specified point.
/// </summary>
/// <param name="args">The hit test arguments.</param>
/// <returns>
/// A hit test result.
/// </returns>
public HitTestResult HitTest(HitTestArguments args)
{
return this.HitTestOverride(args);
}
/// <summary>
/// When overridden in a derived class, tests if the plot element is hit by the specified point.
/// </summary>
/// <param name="args">The hit test arguments.</param>
/// <returns>
/// The result of the hit test.
/// </returns>
protected virtual HitTestResult HitTestOverride(HitTestArguments args)
{
return null;
}
