draw_pointT_draw_pointDrawPointDrawPoint (Operator)
Name
draw_pointT_draw_pointDrawPointDrawPoint — Draw a point.
Signature
Description
draw_pointdraw_pointDrawPointDrawPointDrawPoint returns the parameter for a point, which has been
created interactively by the user in the window.
To create a point you have to press the left mouse button. While keeping
the button pressed you may “drag” the point in any direction.
Pressing the right mouse button terminates the procedure. On macOS
draw_pointdraw_pointDrawPointDrawPointDrawPoint can also be terminated by pressing the escape key.
After terminating the procedure the point is not visible in the window any longer.
Attention
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.
Execution Information
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Processed without parallelization.
Parameters
WindowHandleWindowHandleWindowHandleWindowHandlewindowHandle (input_control) window → HWindow, HTupleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)
Window handle.
RowRowRowRowrow (output_control) point.y → HTupleHTupleHtuple (real) (double) (double) (double)
Row index of the point.
ColumnColumnColumnColumncolumn (output_control) point.x → HTupleHTupleHtuple (real) (double) (double) (double)
Column index of the point.
Example (HDevelop)
draw_point(WindowHandle,Row,Column)
gen_cross_contour_xld (Cross, Row, Column, 6, 0)
Example (C)
draw_point(WindowHandle,&Row,&Column);
gen_cross_contour_xld (&Cross, Row, Column, 6.0, 0.0);
Example (HDevelop)
draw_point(WindowHandle,Row,Column)
gen_cross_contour_xld (Cross, Row, Column, 6, 0)
Example (HDevelop)
draw_point(WindowHandle,Row,Column)
gen_cross_contour_xld (Cross, Row, Column, 6, 0)
Example (HDevelop)
draw_point(WindowHandle,Row,Column)
gen_cross_contour_xld (Cross, Row, Column, 6, 0)
Result
draw_pointdraw_pointDrawPointDrawPointDrawPoint returns 2 (H_MSG_TRUE), if the window is valid and the
needed drawing mode is available.
If necessary, an exception is raised.
Possible Predecessors
open_windowopen_windowOpenWindowOpenWindowOpenWindow
Possible Successors
reduce_domainreduce_domainReduceDomainReduceDomainReduceDomain,
disp_linedisp_lineDispLineDispLineDispLine,
set_coloredset_coloredSetColoredSetColoredSetColored,
set_line_widthset_line_widthSetLineWidthSetLineWidthSetLineWidth,
set_drawset_drawSetDrawSetDrawSetDraw,
set_insertset_insertSetInsertSetInsertSetInsert
See also
draw_point_moddraw_point_modDrawPointModDrawPointModDrawPointMod,
draw_circledraw_circleDrawCircleDrawCircleDrawCircle,
draw_ellipsedraw_ellipseDrawEllipseDrawEllipseDrawEllipse,
set_insertset_insertSetInsertSetInsertSetInsert
Module
Foundation