draw_rectangle2π
Short descriptionπ
draw_rectangle2 β Interactive drawing of any orientated rectangle.
Signatureπ
draw_rectangle2( window WindowHandle, out rectangle2.center.y Row, out rectangle2.center.x Column, out rectangle2.angle.rad Phi, out rectangle2.hwidth Length1, out rectangle2.hheight Length2 )
Descriptionπ
draw_rectangle2 returns the parameter for any orientated rectangle,
which has been created interactively by the user in the window.
The created rectangle is described by its center, its two half axes and the angle between the first half axis and the horizontal coordinate axis.
To create a rectangle you have to press the left mouse button for the center of the
rectangle. While keeping the button pressed you may dimension the length (Length1)
and the orientation (Phi) of the first half axis.
In doing so a temporary default length for the second half axis is assumed, which may be
modified afterwards on demand.
After another mouse click in the middle of the created rectangle, you can move it.
A click close to one side βgripsβ it to modify the rectangleβs dimension in perpendicular
direction to this side. You only can modify the orientation, if you grip a side perpendicular
to the first half axis.
Pressing the right mouse button terminates the procedure.
After terminating the procedure the rectangle is not visible in the window any longer.
Attentionπ
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 informationπ
Execution information
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Multithreading type: reentrant (runs in parallel with non-exclusive operators).
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Multithreading scope: global (may be called from any thread).
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Processed without parallelization.
Parametersπ
WindowHandle (input_control) window β (handle)
Window handle.
Row (output_control) rectangle2.center.y β (real)
Row index of the center.
Column (output_control) rectangle2.center.x β (real)
Column index of the center.
Phi (output_control) rectangle2.angle.rad β (real)
Orientation of the bigger half axis in radians.
Length1 (output_control) rectangle2.hwidth β (real)
Bigger half axis.
Length2 (output_control) rectangle2.hheight β (real)
Smaller half axis.
Resultπ
draw_rectangle2 returns 2 (H_MSG_TRUE) if the window is valid.
If necessary, an exception is raised.
Combinations with other operatorsπ
Combinations
Possible predecessors
Possible successors
reduce_domain, disp_region, set_colored, set_line_width, set_draw
Alternatives
draw_rectangle2_mod, draw_rectangle1, draw_region
See also
Moduleπ
Foundation