drag_region1T_drag_region1DragRegion1DragRegion1drag_region1 (Operator)

Name

drag_region1T_drag_region1DragRegion1DragRegion1drag_region1 — Interactive moving of a region.

Warning

This operator does not work in an HDevelop graphics window opened with dev_open_window.

Signature

drag_region1(SourceRegion : DestinationRegion : WindowHandle : )

Herror T_drag_region1(const Hobject SourceRegion, Hobject* DestinationRegion, const Htuple WindowHandle)

void DragRegion1(const HObject& SourceRegion, HObject* DestinationRegion, const HTuple& WindowHandle)

HRegion HRegion::DragRegion1(const HWindow& WindowHandle) const

HRegion HWindow::DragRegion1(const HRegion& SourceRegion) const

static void HOperatorSet.DragRegion1(HObject sourceRegion, out HObject destinationRegion, HTuple windowHandle)

HRegion HRegion.DragRegion1(HWindow windowHandle)

HRegion HWindow.DragRegion1(HRegion sourceRegion)

def drag_region1(source_region: HObject, window_handle: HHandle) -> HObject

Description

drag_region1drag_region1DragRegion1DragRegion1DragRegion1drag_region1 is used to move a region on the display by mouse. Calling drag_region1drag_region1DragRegion1DragRegion1DragRegion1drag_region1 turns the region visible as soon as the left mouse button is pressed. Therefore the region's edges are displayed only. As representation mode the mode 'not' (see set_drawset_drawSetDrawSetDrawSetDrawset_draw) is used during procedure's permanence. During the movement the cursor resides in the region's barycenter. If you move the mouse with pressed left mouse button, the depicted region follows - delayed - this movement. If you press the right mouse button you terminate drag_region1drag_region1DragRegion1DragRegion1DragRegion1drag_region1. On macOS drag_region1drag_region1DragRegion1DragRegion1DragRegion1drag_region1 can also be terminated by pressing the escape key. The depicted region disappears from the display. Output is a region which corresponds to the last position on the display. You may pass even several regions at once. The operator affine_trans_imageaffine_trans_imageAffineTransImageAffineTransImageAffineTransImageaffine_trans_image moves the gray values.

Attention

Gray values of 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

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.

Example (HDevelop)

draw_region(Obj,WindowHandle)
dev_set_color ('green')
drag_region1(Obj,New,WindowHandle)
dev_display(New)
get_region_runs (Obj, Rows1, ColumnBegins1, ColumnEnds1)
get_region_runs (New, Rows2, ColumnBegins2, ColumnEnds2)
Row1 := Rows1[0]
Column1 := ColumnBegins1[0]
Row2 := Rows2[0]
Column2 := ColumnBegins2[0]
dev_set_color ('white')
gen_arrow_contour_xld (Arrow, Row1,Column1,Row2,Column2, 5, 5)
dev_display (Arrow)

Example (C)

draw_region(&Obj,WindowHandle);
drag_region1(Obj,&New,WindowHandle);
disp_region(New,WindowHandle);

Example (HDevelop)

draw_region(Obj,WindowHandle)
dev_set_color ('green')
drag_region1(Obj,New,WindowHandle)
dev_display(New)
get_region_runs (Obj, Rows1, ColumnBegins1, ColumnEnds1)
get_region_runs (New, Rows2, ColumnBegins2, ColumnEnds2)
Row1 := Rows1[0]
Column1 := ColumnBegins1[0]
Row2 := Rows2[0]
Column2 := ColumnBegins2[0]
dev_set_color ('white')
gen_arrow_contour_xld (Arrow, Row1,Column1,Row2,Column2, 5, 5)
dev_display (Arrow)

Example (HDevelop)

draw_region(Obj,WindowHandle)
dev_set_color ('green')
drag_region1(Obj,New,WindowHandle)
dev_display(New)
get_region_runs (Obj, Rows1, ColumnBegins1, ColumnEnds1)
get_region_runs (New, Rows2, ColumnBegins2, ColumnEnds2)
Row1 := Rows1[0]
Column1 := ColumnBegins1[0]
Row2 := Rows2[0]
Column2 := ColumnBegins2[0]
dev_set_color ('white')
gen_arrow_contour_xld (Arrow, Row1,Column1,Row2,Column2, 5, 5)
dev_display (Arrow)

Example (HDevelop)

draw_region(Obj,WindowHandle)
dev_set_color ('green')
drag_region1(Obj,New,WindowHandle)
dev_display(New)
get_region_runs (Obj, Rows1, ColumnBegins1, ColumnEnds1)
get_region_runs (New, Rows2, ColumnBegins2, ColumnEnds2)
Row1 := Rows1[0]
Column1 := ColumnBegins1[0]
Row2 := Rows2[0]
Column2 := ColumnBegins2[0]
dev_set_color ('white')
gen_arrow_contour_xld (Arrow, Row1,Column1,Row2,Column2, 5, 5)
dev_display (Arrow)

Result

drag_region1drag_region1DragRegion1DragRegion1DragRegion1drag_region1 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

Alternatives

get_mpositionget_mpositionGetMpositionGetMpositionGetMpositionget_mposition, move_regionmove_regionMoveRegionMoveRegionMoveRegionmove_region

See also

set_insertset_insertSetInsertSetInsertSetInsertset_insert, set_drawset_drawSetDrawSetDrawSetDrawset_draw, affine_trans_imageaffine_trans_imageAffineTransImageAffineTransImageAffineTransImageaffine_trans_image

Module

Foundation