public override void MouseMove(ViewportBase vp, ViewportEvent e)
{
base.MouseMove(vp, e);
if (_currentTool == null)
{
return;
}
_currentTool.MouseMove(vp, e);
if (e.Handled)
{
return;
}
if (!(vp is Viewport2D))
{
return;
}
if (_currentTool.NoSelection())
{
return;
}
var viewport = (Viewport2D)vp;
if (_movingPoint == null)
{
// Not moving a point, just test for the cursor.
var vtxs = _currentTool.GetVerticesAtPoint(e.X, viewport.Height - e.Y, viewport);
if (vtxs.Any())
{
viewport.Cursor = Cursors.Cross;
}
else if (viewport.Cursor == Cursors.Cross)
{
viewport.Cursor = Cursors.Default;
}
}
else
{
// Moving a point, get the delta moved
var point = SnapIfNeeded(viewport.Expand(viewport.ScreenToWorld(e.X, viewport.Height - e.Y)));
if (!KeyboardState.Alt && KeyboardState.Shift)
{
// If shift is down, retain the offset the point was at before (relative to the grid)
point += _snapPointOffset;
}
var moveDistance = point - viewport.ZeroUnusedCoordinate(_movingPoint.Coordinate);
_currentTool.DragMove(moveDistance);
//RefreshMidpoints(false);
UpdateMidpoints();
MoveSelection = null;
}
}