IEnumerator <Ctrl.IOperation> DragPlane(Graphics.IView view, MouseEventArgs e)
{
var plane = this.GetQuadPlanes()[_highlightIndex];
var sphere = _docviews.WorldDocumentScene.BoundingSphere;
var range = new Hisui.Geom.Range(-sphere.Radius, sphere.Radius);
var z0 = range.ParamToValue(this.Position);
var eyeshot1 = view.Camera.GetEyeshotLine(e.Location);
var y1 = GetIntersection(plane, eyeshot1).y;
var up = new Ctrl.LButtonUp(view.Events);
up.MouseMove += (ss, ee) =>
{
var eyeshot2 = view.Camera.GetEyeshotLine(ee.Location);
var z = z0 + GetIntersection(plane, eyeshot2).y - y1;
this.Position = range.ValueToParam(z);
view.Invalidate();
};
yield return(up);
view.Invalidate();
}
IEnumerator <Ctrl.IOperation> DragCompass(int x0, int y0)
{
Cursor.Current = Cursors.SizeAll;
Geom.Point2i pos0 = _pos;
Ctrl.MouseMove drag = new Ctrl.MouseMove(_view.Events);
while (true)
{
yield return(drag);
if (drag.EventArgs.Button != MouseButtons.Left)
{
yield break;
}
_pos.x = pos0.x + (drag.EventArgs.X - x0);
_pos.y = pos0.y + (drag.EventArgs.Y - y0);
this.FixPos();
_view.Invalidate();
}
}