public override void MouseUp(object sender, MouseButtonEventArgs e)
{
_selectionStart = _selectionEnd = null;
Apply();
UpdateSelectionPreview();
}
public override void MouseDown(object sender, MouseButtonEventArgs e)
{
SegmentSide segmentSide = ProcessEventArg(sender, e);
if (segmentSide == null) return;
_selectionStart = _selectionEnd = segmentSide;
UpdateSelectionPreview();
}
public override void MouseMove(object sender, MouseEventArgs e)
{
SegmentSide segmentSide = ProcessEventArg(sender, e);
if (segmentSide == null) return;
if (_selectionStart != null && e.LeftButton == MouseButtonState.Pressed)
{
_selectionEnd = segmentSide;
UpdateSelectionPreview();
}
else
{
_selectionStart = _selectionEnd = segmentSide;
UpdateSelectionPreview();
}
}
public override void ClearPreview()
{
if (_selectionStart != null)
{
_selectionStart = _selectionEnd = null;
UpdateSelectionPreview();
}
}