| Operators |
drag_region2 — Interactive movement of a region with fixpoint specification.
drag_region2(SourceRegion : DestinationRegion : WindowHandle, Row, Column : )
You use drag_region2 to move a region on the display by mouse. It corresponds to the operator drag_region1 with the difference, that the position of the mouse cursor can be determined.
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.
Regions to move.
Moved regions.
Window handle.
Row index of the reference point.
Default value: 100
Suggested values: 0, 64, 128, 256, 512
Typical range of values: 0 ≤ Row ≤ 1024
Column index of the reference point.
Default value: 100
Suggested values: 0, 64, 128, 256, 512
Typical range of values: 0 ≤ Column ≤ 1024
drag_region2 returns 2 (H_MSG_TRUE), if a region is entered, the window is valid and the needed drawing mode (see set_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>:).
reduce_domain, disp_region, set_colored, set_line_width, set_draw, set_insert, affine_trans_image
get_mposition, move_region, drag_region1, drag_region3
set_insert, set_draw, affine_trans_image
Foundation
| Operators |