clear_drawing_objectT_clear_drawing_objectClearDrawingObjectClearDrawingObjectclear_drawing_object清除绘图对象（算子）
名称
clear_drawing_objectT_clear_drawing_objectClearDrawingObjectClearDrawingObjectclear_drawing_object — 删除绘图对象。
签名
clear_drawing_object( : : DrawID : )
Herror T_clear_drawing_object(const Htuple DrawID)
def clear_drawing_object(draw_id: HHandle) -> None
描述
该算子删除绘图对象 DrawIDDrawIDDrawIDDrawIDdrawIDdraw_id。该对象将自动从先前关联的窗口中分离。调用 clear_drawing_objectclear_drawing_objectClearDrawingObjectClearDrawingObjectClearDrawingObjectclear_drawing_object 后，该绘图对象将无法继续使用。
执行信息
- 多线程类型：可重入（与非独占算子并行运行）。
- 多线程作用域：全局（可从任何线程调用）。
- 未采用并行化处理。
此算子修改后续输入参数的状态：
在执行此算子时，若该参数值需在多个线程间使用，则必须对其访问进行同步。
参数
DrawIDDrawIDDrawIDDrawIDdrawIDdraw_id (输入控制，状态被修改) drawing_object → HDrawingObject, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)
绘图对象的句柄。
结果
clear_drawing_objectclear_drawing_objectClearDrawingObjectClearDrawingObjectClearDrawingObjectclear_drawing_object 返回 2 (H_MSG_TRUE)，当 DrawIDDrawIDDrawIDDrawIDdrawIDdraw_id 有效。否则将抛出异常。
可能的前趋
create_drawing_object_rectangle1create_drawing_object_rectangle1CreateDrawingObjectRectangle1CreateDrawingObjectRectangle1CreateDrawingObjectRectangle1create_drawing_object_rectangle1,
create_drawing_object_rectangle2create_drawing_object_rectangle2CreateDrawingObjectRectangle2CreateDrawingObjectRectangle2CreateDrawingObjectRectangle2create_drawing_object_rectangle2,
create_drawing_object_ellipsecreate_drawing_object_ellipseCreateDrawingObjectEllipseCreateDrawingObjectEllipseCreateDrawingObjectEllipsecreate_drawing_object_ellipse,
create_drawing_object_circle_sectorcreate_drawing_object_circle_sectorCreateDrawingObjectCircleSectorCreateDrawingObjectCircleSectorCreateDrawingObjectCircleSectorcreate_drawing_object_circle_sector,
create_drawing_object_ellipse_sectorcreate_drawing_object_ellipse_sectorCreateDrawingObjectEllipseSectorCreateDrawingObjectEllipseSectorCreateDrawingObjectEllipseSectorcreate_drawing_object_ellipse_sector,
create_drawing_object_xldcreate_drawing_object_xldCreateDrawingObjectXldCreateDrawingObjectXldCreateDrawingObjectXldcreate_drawing_object_xld,
create_drawing_object_linecreate_drawing_object_lineCreateDrawingObjectLineCreateDrawingObjectLineCreateDrawingObjectLinecreate_drawing_object_line,
create_drawing_object_circlecreate_drawing_object_circleCreateDrawingObjectCircleCreateDrawingObjectCircleCreateDrawingObjectCirclecreate_drawing_object_circle,
create_drawing_object_textcreate_drawing_object_textCreateDrawingObjectTextCreateDrawingObjectTextCreateDrawingObjectTextcreate_drawing_object_text,
detach_drawing_object_from_windowdetach_drawing_object_from_windowDetachDrawingObjectFromWindowDetachDrawingObjectFromWindowDetachDrawingObjectFromWindowdetach_drawing_object_from_window,
attach_drawing_object_to_windowattach_drawing_object_to_windowAttachDrawingObjectToWindowAttachDrawingObjectToWindowAttachDrawingObjectToWindowattach_drawing_object_to_window
可能的后继
clear_windowclear_windowClearWindowClearWindowClearWindowclear_window,
close_windowclose_windowCloseWindowCloseWindowCloseWindowclose_window
另见
create_drawing_object_rectangle1create_drawing_object_rectangle1CreateDrawingObjectRectangle1CreateDrawingObjectRectangle1CreateDrawingObjectRectangle1create_drawing_object_rectangle1,
create_drawing_object_rectangle2create_drawing_object_rectangle2CreateDrawingObjectRectangle2CreateDrawingObjectRectangle2CreateDrawingObjectRectangle2create_drawing_object_rectangle2,
create_drawing_object_ellipsecreate_drawing_object_ellipseCreateDrawingObjectEllipseCreateDrawingObjectEllipseCreateDrawingObjectEllipsecreate_drawing_object_ellipse,
create_drawing_object_circle_sectorcreate_drawing_object_circle_sectorCreateDrawingObjectCircleSectorCreateDrawingObjectCircleSectorCreateDrawingObjectCircleSectorcreate_drawing_object_circle_sector,
create_drawing_object_ellipse_sectorcreate_drawing_object_ellipse_sectorCreateDrawingObjectEllipseSectorCreateDrawingObjectEllipseSectorCreateDrawingObjectEllipseSectorcreate_drawing_object_ellipse_sector,
create_drawing_object_xldcreate_drawing_object_xldCreateDrawingObjectXldCreateDrawingObjectXldCreateDrawingObjectXldcreate_drawing_object_xld,
create_drawing_object_linecreate_drawing_object_lineCreateDrawingObjectLineCreateDrawingObjectLineCreateDrawingObjectLinecreate_drawing_object_line,
create_drawing_object_circlecreate_drawing_object_circleCreateDrawingObjectCircleCreateDrawingObjectCircleCreateDrawingObjectCirclecreate_drawing_object_circle,
create_drawing_object_textcreate_drawing_object_textCreateDrawingObjectTextCreateDrawingObjectTextCreateDrawingObjectTextcreate_drawing_object_text
模块
基础