draw_circle_modT_draw_circle_modDrawCircleModDrawCircleModdraw_circle_mod (算子)
名称
draw_circle_modT_draw_circle_modDrawCircleModDrawCircleModdraw_circle_mod — 交互式绘制圆。
签名
void DrawCircleMod(const HTuple& WindowHandle, const HTuple& RowIn, const HTuple& ColumnIn, const HTuple& RadiusIn, HTuple* Row, HTuple* Column, HTuple* Radius)
void HWindow::DrawCircleMod(double RowIn, double ColumnIn, double RadiusIn, double* Row, double* Column, double* Radius) const
static void HOperatorSet.DrawCircleMod(HTuple windowHandle, HTuple rowIn, HTuple columnIn, HTuple radiusIn, out HTuple row, out HTuple column, out HTuple radius)
void HWindow.DrawCircleMod(double rowIn, double columnIn, double radiusIn, out double row, out double column, out double radius)
描述
draw_circle_moddraw_circle_modDrawCircleModDrawCircleModDrawCircleModdraw_circle_mod produces the parameter for a circle created interactive by
the user in the window.
To create a circle are expected the coordinates RowInRowInRowInRowInrowInrow_in and
ColumnInColumnInColumnInColumnIncolumnIncolumn_in of the center of a circle with radius RadiusInRadiusInRadiusInRadiusInradiusInradius_in.
After another mouse click in the created circle center you can move it.
A clicking close to the circular arc you can modify the RadiusRadiusRadiusRadiusradiusradius of
the circle.
Pressing the right mouse button terminates the procedure.
After terminating the procedure the circle is not visible in the window any longer.
注意
If used in a buffer window, mouse events have to be supplied by the
application, while the draw operator must be run in another thread.
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。
参数
WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle (输入控制) window → HWindow, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)
窗口句柄。
RowInRowInRowInRowInrowInrow_in (输入控制) circle.center.y → HTuplefloatHTupleHtuple (real) (double) (double) (double)
中心列索引。
ColumnInColumnInColumnInColumnIncolumnIncolumn_in (输入控制) circle.center.x → HTuplefloatHTupleHtuple (real) (double) (double) (double)
中心列索引。
RadiusInRadiusInRadiusInRadiusInradiusInradius_in (输入控制) circle.radius → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Radius of the circle.
RowRowRowRowrowrow (输出控制) circle.center.y → HTuplefloatHTupleHtuple (real) (double) (double) (double)
中心列索引。
ColumnColumnColumnColumncolumncolumn (输出控制) circle.center.x → HTuplefloatHTupleHtuple (real) (double) (double) (double)
中心列索引。
RadiusRadiusRadiusRadiusradiusradius (输出控制) circle.radius → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Circle's radius.
示例（HDevelop）
read_image(Image,'monkey')
draw_circle_mod(WindowHandle,20,20,15,Row,Column,Radius)
gen_circle(Circle,Row,Column,Radius)
reduce_domain(Image,Circle,ImageReduced)
invert_image (ImageReduced, ImageInvert)
dev_display (ImageInvert)
示例（C）
read_image(&Image,"monkey");
draw_circle_mod(WindowHandle,20,20,15,&Row,&Column,&Radius);
gen_circle(&Circle,Row,Column,Radius);
reduce_domain(Image,Circle,&GrayCircle);
disp_image(GrayCircle,WindowHandle);
示例（HDevelop）
read_image(Image,'monkey')
draw_circle_mod(WindowHandle,20,20,15,Row,Column,Radius)
gen_circle(Circle,Row,Column,Radius)
reduce_domain(Image,Circle,ImageReduced)
invert_image (ImageReduced, ImageInvert)
dev_display (ImageInvert)
示例（HDevelop）
read_image(Image,'monkey')
draw_circle_mod(WindowHandle,20,20,15,Row,Column,Radius)
gen_circle(Circle,Row,Column,Radius)
reduce_domain(Image,Circle,ImageReduced)
invert_image (ImageReduced, ImageInvert)
dev_display (ImageInvert)
示例（HDevelop）
read_image(Image,'monkey')
draw_circle_mod(WindowHandle,20,20,15,Row,Column,Radius)
gen_circle(Circle,Row,Column,Radius)
reduce_domain(Image,Circle,ImageReduced)
invert_image (ImageReduced, ImageInvert)
dev_display (ImageInvert)
结果
draw_circle_moddraw_circle_modDrawCircleModDrawCircleModDrawCircleModdraw_circle_mod returns 2 (
H_MSG_TRUE)
if the window is valid and the
needed drawing mode (see set_insertset_insertSetInsertSetInsertSetInsertset_insert) is available。如有必要，则抛出异常。
可能的前趋
open_windowopen_windowOpenWindowOpenWindowOpenWindowopen_window
可能的后继
reduce_domainreduce_domainReduceDomainReduceDomainReduceDomainreduce_domain,
disp_regiondisp_regionDispRegionDispRegionDispRegiondisp_region,
set_coloredset_coloredSetColoredSetColoredSetColoredset_colored,
set_line_widthset_line_widthSetLineWidthSetLineWidthSetLineWidthset_line_width,
set_drawset_drawSetDrawSetDrawSetDrawset_draw,
set_insertset_insertSetInsertSetInsertSetInsertset_insert
替代
draw_circledraw_circleDrawCircleDrawCircleDrawCircledraw_circle,
draw_ellipsedraw_ellipseDrawEllipseDrawEllipseDrawEllipsedraw_ellipse,
draw_regiondraw_regionDrawRegionDrawRegionDrawRegiondraw_region
另见
gen_circlegen_circleGenCircleGenCircleGenCirclegen_circle,
draw_rectangle1draw_rectangle1DrawRectangle1DrawRectangle1DrawRectangle1draw_rectangle1,
draw_rectangle2draw_rectangle2DrawRectangle2DrawRectangle2DrawRectangle2draw_rectangle2,
draw_polygondraw_polygonDrawPolygonDrawPolygonDrawPolygondraw_polygon,
set_insertset_insertSetInsertSetInsertSetInsertset_insert
模块
基础