void SetSelection_Rect(int anchor, int caret, IView view)
{
// calculate graphical position of both anchor and new caret
Point anchorPos = view.GetVirPosFromIndex(anchor);
Point caretPos = view.GetVirPosFromIndex(caret);
// calculate ranges selected by the rectangle made with the two points
_RectSelectRanges = view.GetRectSelectRanges(
Utl.MakeRectFromTwoPoints(anchorPos, caretPos)
);
// set selection
SetSelection_Normal(anchor, caret);
}
