space_view3d_panel_measure.py

                row = layout.row()
                #row.label(text=str(dist_vec.length))
                row.prop(sce, "measure_panel_dist")

                row = layout.row()
                row.label(text="", icon='CURSOR')

                row.label(text="", icon='ARROW_LEFTRIGHT')

                row.label(text="", icon='OBJECT_DATA')
                row.prop(obj, "name", text="")

                row = layout.row()
                row.prop(sce, "measure_panel_calc_area",
                    text="Surface area:")

                if (sce.measure_panel_calc_area):
                    # Calculate and display surface area of the object.
                    area = objectSurfaceArea(obj, False, measureGlobal(sce))
                    if (area >= 0):
                        row = layout.row()
                        row.label(text=obj.name, icon='OBJECT_DATA')
                        sce.measure_panel_area1 = area
                        row.prop(sce, "measure_panel_area1")

                        row = layout.row()
                        row.prop(sce,
                            "measure_panel_transform",
                            expand=True)

            elif not context.selected_objects:
                # Nothing selected.
                # We measure the distance from the origin to the 3D cursor.

                # Get the 2 measure points
                line = getMeasurePoints(context)
                if line != 0:
                    dist_vec = line[0] - line[1]

                sce.measure_panel_dist = dist_vec.length

                row = layout.row()
                row.prop(sce, "measure_panel_dist")

                row = layout.row()
                row.label(text="", icon='CURSOR')
                row.label(text="", icon='ARROW_LEFTRIGHT')
                row.label(text="Origin [0,0,0]")

            else:
                row = layout.row()
                row.label(text="Selection not supported.",
                    icon='INFO')


def register():
    pass


def unregister():
    pass

if __name__ == "__main__":
    register()