private void TryTapToSelect(Stroke stroke)
{
// We interpret strokes with fewer than 25 packets,
// starting and ending on the same body, as tap gestures.
int np = stroke.PacketCount;
Point head = stroke.GetPoint(0), tail = stroke.GetPoint(np - 1);
RigidBodyBase[] headhits = doc.HitTestBodies(head);
RigidBodyBase[] tailhits = doc.HitTestBodies(tail);
if (np <= 25 &&
headhits.Length > 0 &&
tailhits.Length > 0 &&
Object.ReferenceEquals(headhits[0], tailhits[0]))
{
tappedbody = headhits[0];
// Ensure we didn't just tap what's already selected.
ArrayList selbodies = new ArrayList(
doc.GetBodiesFor(inkoverlay.Selection));
if (selbodies.Contains(tappedbody))
{
return;
}
// We must delay the call to set_Selection, until after InkOverlay is
// finished looking at this stroke. BeginInvoke seems to work nicely
// for this purpose.
dbg.WriteLine("-------TTS--------");
base.BeginInvoke(new MethodInvoker(DelayTapToSelect));
}
}
