HitTest Method (StrokeCollection)
Returns a collection of strokes that are intersected by the points in the StylusPointCollection passed.
| XAML |
Cannot use methods in XAML.
|
| Scripting |
retval = object.HitTest(stylusPoints)
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Parameters
| stylusPoints |
The collection of stylus points used to check for intersection with the StrokeCollection. |
Return Value
A collection of strokes that are intersected by the points in the StylusPointCollection passed.
Remarks
For a StrokeCollection sc, containing strokes S0 - S2, and a StylusPointCollection spc, containing points P0 - P3, calling:
sc.HitTest(spc)
returns a StrokeCollection containing S1 and S2.
Hit test results
.gif)
Examples
| JavaScript |
|---|
// Add the new points to the Stroke we're working with
// or delete strokes if we are in erase mode
function inkPresenterMouseMove(sender, args)
{
var stylusPoints = args.getStylusPoints(sender);
// Erase Mode?
if (lastErasePoint != null)
{
// connect the point from previous mouse event
// to the current collection of stylus points
stylusPoints.insert(0, lastErasePoint);
var hitStrokes = sender.strokes.hitTest(stylusPoints);
// Remove the strokes that were intersected above
for (var i = 0; i < hitStrokes.Count; i++)
{
sender.strokes.remove(hitStrokes.getItem(i));
}
// update the cached last erase point
lastErasePoint = stylusPoints.getItem(stylusPoints.count-1);
}
// Ink Mode?
if (newStroke != null)
{
newStroke.stylusPoints.addStylusPoints(stylusPoints);
}
}
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