ClassesClasses | | Operators

draw_xldT_draw_xldDrawXldDrawXld (Operator)


draw_xldT_draw_xldDrawXldDrawXld — Interactive drawing of a contour.


draw_xld( : ContOut : WindowHandle, Rotate, Move, Scale, KeepRatio : )

Herror T_draw_xld(Hobject* ContOut, const Htuple WindowHandle, const Htuple Rotate, const Htuple Move, const Htuple Scale, const Htuple KeepRatio)

void DrawXld(HObject* ContOut, const HTuple& WindowHandle, const HTuple& Rotate, const HTuple& Move, const HTuple& Scale, const HTuple& KeepRatio)

void HXLDCont::DrawXld(const HWindow& WindowHandle, const HString& Rotate, const HString& Move, const HString& Scale, const HString& KeepRatio)

void HXLDCont::DrawXld(const HWindow& WindowHandle, const char* Rotate, const char* Move, const char* Scale, const char* KeepRatio)

HXLDCont HWindow::DrawXld(const HString& Rotate, const HString& Move, const HString& Scale, const HString& KeepRatio) const

HXLDCont HWindow::DrawXld(const char* Rotate, const char* Move, const char* Scale, const char* KeepRatio) const

static void HOperatorSet.DrawXld(out HObject contOut, HTuple windowHandle, HTuple rotate, HTuple move, HTuple scale, HTuple keepRatio)

void HXLDCont.DrawXld(HWindow windowHandle, string rotate, string move, string scale, string keepRatio)

HXLDCont HWindow.DrawXld(string rotate, string move, string scale, string keepRatio)


draw_xlddraw_xldDrawXldDrawXldDrawXld returns a contour, which has been created interactively by the user in the window.

Directly after calling draw_xlddraw_xldDrawXldDrawXldDrawXld you can add contour points by clicking with the left mouse button in the window at the desired positions. You delete the point appended last by pressing the Ctrl key. As soon as you add three contour points, 5 so-called pick points are displayed, one in the middle and 4 at the corners of the surrounding rectangle. By clicking on a pick point you can close the contour or open it again. If the contour is closed, the pick points are displayed in form of squares, otherwise they are shaped like a 'u'.

If the contour is closed you can

By pressing the Shift key, you can switch into the transformation mode. In this mode you can rotate, move, and scale the contour as a whole, but only if you set the parameters RotateRotateRotateRotaterotate, MoveMoveMoveMovemove, and ScaleScaleScaleScalescale, respectively, to 'true'"true""true""true""true". Instead of the pick points, 3 symbols are displayed with the contour: a cross in the middle and an arrow to the right if RotateRotateRotateRotaterotate is set to 'true'"true""true""true""true", and a double-headed arrow to the upper right if ScaleScaleScaleScalescale is set to 'true'"true""true""true""true".

You can

Pressing the right mouse button terminates the procedure. On macOS draw_xlddraw_xldDrawXldDrawXldDrawXld can also be terminated by pressing the escape key.


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


ContOutContOutContOutContOutcontOut (output_object)  xld_cont objectHXLDContHXLDContHobject *

Modified contour.

WindowHandleWindowHandleWindowHandleWindowHandlewindowHandle (input_control)  window HWindow, HTupleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)

Window handle.

RotateRotateRotateRotaterotate (input_control)  string HTupleHTupleHtuple (string) (string) (HString) (char*)

Enable rotation?

Default value: 'true' "true" "true" "true" "true"

List of values: 'false'"false""false""false""false", 'true'"true""true""true""true"

MoveMoveMoveMovemove (input_control)  string HTupleHTupleHtuple (string) (string) (HString) (char*)

Enable moving?

Default value: 'true' "true" "true" "true" "true"

List of values: 'false'"false""false""false""false", 'true'"true""true""true""true"

ScaleScaleScaleScalescale (input_control)  string HTupleHTupleHtuple (string) (string) (HString) (char*)

Enable scaling?

Default value: 'true' "true" "true" "true" "true"

List of values: 'false'"false""false""false""false", 'true'"true""true""true""true"

KeepRatioKeepRatioKeepRatioKeepRatiokeepRatio (input_control)  string HTupleHTupleHtuple (string) (string) (HString) (char*)

Keep ratio while scaling?

Default value: 'true' "true" "true" "true" "true"

List of values: 'false'"false""false""false""false", 'true'"true""true""true""true"


draw_xlddraw_xldDrawXldDrawXldDrawXld returns 2 (H_MSG_TRUE), if the window is valid and the needed drawing mode (see set_insertset_insertSetInsertSetInsertSetInsert) is available. If necessary, an exception is raised.

Possible Predecessors


Possible Successors

reduce_domainreduce_domainReduceDomainReduceDomainReduceDomain, disp_regiondisp_regionDispRegionDispRegionDispRegion, set_coloredset_coloredSetColoredSetColoredSetColored, set_line_widthset_line_widthSetLineWidthSetLineWidthSetLineWidth, set_drawset_drawSetDrawSetDrawSetDraw, set_insertset_insertSetInsertSetInsertSetInsert


draw_rectangle2draw_rectangle2DrawRectangle2DrawRectangle2DrawRectangle2, draw_rectangle1draw_rectangle1DrawRectangle1DrawRectangle1DrawRectangle1, draw_rectangle2draw_rectangle2DrawRectangle2DrawRectangle2DrawRectangle2, draw_regiondraw_regionDrawRegionDrawRegionDrawRegion

See also

gen_rectangle2gen_rectangle2GenRectangle2GenRectangle2GenRectangle2, draw_circledraw_circleDrawCircleDrawCircleDrawCircle, draw_ellipsedraw_ellipseDrawEllipseDrawEllipseDrawEllipse, set_insertset_insertSetInsertSetInsertSetInsert



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