drag_region2T_drag_region2DragRegion2DragRegion2drag_region2 (Operator)
Name
drag_region2T_drag_region2DragRegion2DragRegion2drag_region2 — Interactive movement of a region with fixpoint specification.
Warning
This operator does not work in an HDevelop graphics window opened with
dev_open_window.
Signature
Description
You use drag_region2drag_region2DragRegion2DragRegion2DragRegion2drag_region2 to move a region on the display by mouse.
It corresponds to the operator drag_region1drag_region1DragRegion1DragRegion1DragRegion1drag_region1 with the
difference, that the position of the mouse cursor can be determined.
Attention
Gray values of the regions are not moved.
With moving the input region it is not sure whether the gray values of the
output regions are filled reasonable. This may occur if the gray values of the
input regions do not comprise the whole image.
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
SourceRegionSourceRegionSourceRegionSourceRegionsourceRegionsource_region (input_object) region-array → objectHRegionHObjectHRegionHobject
Regions to move.
DestinationRegionDestinationRegionDestinationRegionDestinationRegiondestinationRegiondestination_region (output_object) region-array → objectHRegionHObjectHRegionHobject *
Moved regions.
WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle (input_control) window → HWindow, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)
Window handle.
RowRowRowRowrowrow (input_control) point.y → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Row index of the reference point.
Default value: 100
Suggested values: 0, 64, 128, 256, 512
Typical range of values: 0
≤
Row
Row
Row
Row
row
row
≤
1024
ColumnColumnColumnColumncolumncolumn (input_control) point.x → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Column index of the reference point.
Default value: 100
Suggested values: 0, 64, 128, 256, 512
Typical range of values: 0
≤
Column
Column
Column
Column
column
column
≤
1024
Result
drag_region2drag_region2DragRegion2DragRegion2DragRegion2drag_region2 returns TRUE, if a region is entered, the window
is valid and the needed drawing mode (see set_insertset_insertSetInsertSetInsertSetInsertset_insert)
is available.
If necessary, an exception is raised.
You may determine the behavior after an empty input with
set_system(::'no_object_result',<Result>:)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)set_system("no_object_result",<Result>).
Possible Predecessors
open_windowopen_windowOpenWindowOpenWindowOpenWindowopen_window
Possible Successors
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,
affine_trans_imageaffine_trans_imageAffineTransImageAffineTransImageAffineTransImageaffine_trans_image
Alternatives
get_mpositionget_mpositionGetMpositionGetMpositionGetMpositionget_mposition,
move_regionmove_regionMoveRegionMoveRegionMoveRegionmove_region,
drag_region1drag_region1DragRegion1DragRegion1DragRegion1drag_region1,
drag_region3drag_region3DragRegion3DragRegion3DragRegion3drag_region3
See also
set_insertset_insertSetInsertSetInsertSetInsertset_insert,
set_drawset_drawSetDrawSetDrawSetDrawset_draw,
affine_trans_imageaffine_trans_imageAffineTransImageAffineTransImageAffineTransImageaffine_trans_image
Module
Foundation