draw_circle_modT_draw_circle_modDrawCircleModDrawCircleModdraw_circle_mod (算子名称)
名称
draw_circle_modT_draw_circle_modDrawCircleModDrawCircleModdraw_circle_mod — Interactive drawing of a circle.
参数签名
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.
运行信息
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Processed without parallelization.
参数表
WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle (input_control) window → HWindow, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)
Window handle.
RowInRowInRowInRowInrowInrow_in (input_control) circle.center.y → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Row index of the center.
ColumnInColumnInColumnInColumnIncolumnIncolumn_in (input_control) circle.center.x → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Column index of the center.
RadiusInRadiusInRadiusInRadiusInradiusInradius_in (input_control) circle.radius → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Radius of the circle.
RowRowRowRowrowrow (output_control) circle.center.y → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Row index of the center.
ColumnColumnColumnColumncolumncolumn (output_control) circle.center.x → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Column index of the center.
RadiusRadiusRadiusRadiusradiusradius (output_control) circle.radius → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Circle's radius.
例程 (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)
例程 (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);
例程 (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)
例程 (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)
例程 (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.
If necessary, an exception is raised.
可能的前置算子
open_windowopen_windowOpenWindowOpenWindowOpenWindowopen_window
可能的后置算子
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
可替代算子
draw_circledraw_circleDrawCircleDrawCircleDrawCircledraw_circle,
draw_ellipsedraw_ellipseDrawEllipseDrawEllipseDrawEllipsedraw_ellipse,
draw_regiondraw_regionDrawRegionDrawRegionDrawRegiondraw_region
参考其它
gen_circlegen_circleGenCircleGenCircleGenCirclegen_circle,
draw_rectangle1draw_rectangle1DrawRectangle1DrawRectangle1DrawRectangle1draw_rectangle1,
draw_rectangle2draw_rectangle2DrawRectangle2DrawRectangle2DrawRectangle2draw_rectangle2,
draw_polygondraw_polygonDrawPolygonDrawPolygonDrawPolygondraw_polygon,
set_insertset_insertSetInsertSetInsertSetInsertset_insert
模块
Foundation