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)
|
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
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); } } |