addSelection applyTransform cloneSelection deleteSelection deleteVertex getBoundingBox getSelectedHandle getSelectedShapeHandle getSelection getSelection getSelectionCount getSelectionForChange getSelectionForChange getSelectState getSelectType groupSelection insertVertex isEditMode isFixedLength isLocked isSelectedByType overturnPolygon resetSelection selectAll setEditMode setFixedLength setLocked switchClosed ungroupSelection ~MgSelection

groupSelection() virtual bool MgSelection::groupSelection ( const MgMotion *  sender ) pure virtual 对选中的图形成组，并选中新成组图形 在 MgCmdSelect 内被实现. 这是这个函数的调用关系图: