set_partT_set_partSetPartSetPartset_part (算子)

名称

set_partT_set_partSetPartSetPartset_part — 修改显示的图像部分。

签名

set_part( : : WindowHandle, Row1, Column1, Row2, Column2 : )

描述

set_partset_partSetPartSetPartSetPartset_part modifies the image part that is displayed in the window. (Row1Row1Row1Row1row1row_1,Column1Column1Column1Column1column1column_1) denotes the upper left corner and (Row2Row2Row2Row2row2row_2,Column2Column2Column2Column2column2column_2) the lower right corner of the image part to display. The changed values are used by gray value output operators (disp_imagedisp_imageDispImageDispImageDispImagedisp_image, disp_colordisp_colorDispColorDispColorDispColordisp_color) as well as region output operators (disp_regiondisp_regionDispRegionDispRegionDispRegiondisp_region).

If only part of an image is displayed, it will be zoomed to full window size. The zooming interpolation method can be set with set_part_styleset_part_styleSetPartStyleSetPartStyleSetPartStyleset_part_style。get_partget_partGetPartGetPartGetPartget_part returns the values of the image part to display. Adapting the size of the window to the size of the image part to be displayed will prevent slowing down the display due to necessary interpolations. Thus, the window preferably has the same size as the image part to be displayed, or otherwise half its size, quarter its size, etc.

Beside setting the image part directly, the following special modes are supported:

Row1Row1Row1Row1row1row_1 = Column1Column1Column1Column1column1column_1 = Row2Row2Row2Row2row2row_2 = Column2Column2Column2Column2column2column_2 = -1：: The window size is chosen as the image part, i.e. no zooming of the image will be performed.
Row1Row1Row1Row1row1row_1, Column1Column1Column1Column1column1column_1 > -1 and Row2Row2Row2Row2row2row_2 = Column2Column2Column2Column2column2column_2 = -1：: The size of the last displayed image (in this window) is chosen as the image part, i.e. the image can completely be displayed in the image. For this the image will be zoomed if necessary.
Row1Row1Row1Row1row1row_1 = Column1Column1Column1Column1column1column_1 = 0 and Row2Row2Row2Row2row2row_2 = Column2Column2Column2Column2column2column_2 = -2：: The size of the last displayed image (in this window) is used to adapt the image part such that the image fits completely into the window, preserving the aspect ratio of the image. For this the image will be zoomed if necessary.

执行信息

多线程类型：可重入（与非独占算子并行运行）。
多线程作用域：全局（可从任何线程调用）。
未采用并行化处理。

参数

WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle (输入控制) window → (handle)

窗口句柄。

Row1Row1Row1Row1row1row_1 (输入控制) rectangle.origin.y → (integer / real)

Row of the upper left corner of the chosen image part.

默认值： 0

Column1Column1Column1Column1column1column_1 (输入控制) rectangle.origin.x → (integer / real)

Column of the upper left corner of the chosen image part.

默认值： 0

Row2Row2Row2Row2row2row_2 (输入控制) rectangle.corner.y → (integer / real)

Row of the lower right corner of the chosen image part.

默认值： -1

限制： Row2 >= Row1 || Row2 == -1 || Row1 == 0 && Row2 == -2

Column2Column2Column2Column2column2column_2 (输入控制) rectangle.corner.x → (integer / real)

Column of the lower right corner of the chosen image part.

默认值： -1

限制： Column2 >= Column1 || Column2 == -1 || Column1 == 0 && Column2 == -2

示例（HDevelop）

get_system('width',Width)
get_system('height',Height)
set_part(WindowHandle,0,0,Height-1,Width-1)
disp_image(Image,WindowHandle)
draw_rectangle1(WindowHandle,Row1,Column1,Row2,Column2)
set_part(WindowHandle,Row1,Column1,Row2,Column2)
disp_image(Image,WindowHandle)

示例（C）

get_system("width",width);
get_system("height",height);
create_tuple_i(&twidth, width-1);
create_tuple_i(&theight, height-1);
create_tuple_i(&zero, 0);
T_set_part(WindowHandle,zero,zero,theight,twidth);
destroy_tuple(twidth); destroy_tuple(theight); destroy_tuple(zero);
T_disp_image(Image,WindowHandle);
T_draw_rectangle1(WindowHandle,&Row1,&Col1,&Row2,&Col2);
T_set_part(WindowHandle,Row1,Col1,Row2,Col2);
T_disp_image(Image,WindowHandle);
destroy_tuple(Row1); destroy_tuple(Col1);
destroy_tuple(Row2); destroy_tuple(Col2);

示例（HDevelop）

get_system('width',Width)
get_system('height',Height)
set_part(WindowHandle,0,0,Height-1,Width-1)
disp_image(Image,WindowHandle)
draw_rectangle1(WindowHandle,Row1,Column1,Row2,Column2)
set_part(WindowHandle,Row1,Column1,Row2,Column2)
disp_image(Image,WindowHandle)

示例（HDevelop）

get_system('width',Width)
get_system('height',Height)
set_part(WindowHandle,0,0,Height-1,Width-1)
disp_image(Image,WindowHandle)
draw_rectangle1(WindowHandle,Row1,Column1,Row2,Column2)
set_part(WindowHandle,Row1,Column1,Row2,Column2)
disp_image(Image,WindowHandle)

示例（HDevelop）

get_system('width',Width)
get_system('height',Height)
set_part(WindowHandle,0,0,Height-1,Width-1)
disp_image(Image,WindowHandle)
draw_rectangle1(WindowHandle,Row1,Column1,Row2,Column2)
set_part(WindowHandle,Row1,Column1,Row2,Column2)
disp_image(Image,WindowHandle)

结果

set_partset_partSetPartSetPartSetPartset_part returns 2 ( H_MSG_TRUE) if the window is valid.否则将抛出异常。

可能的前趋

get_partget_partGetPartGetPartGetPartget_part

可能的后继

set_part_styleset_part_styleSetPartStyleSetPartStyleSetPartStyleset_part_style, disp_imagedisp_imageDispImageDispImageDispImagedisp_image, disp_regiondisp_regionDispRegionDispRegionDispRegiondisp_region

替代

affine_trans_imageaffine_trans_imageAffineTransImageAffineTransImageAffineTransImageaffine_trans_image

另见

get_partget_partGetPartGetPartGetPartget_part, set_part_styleset_part_styleSetPartStyleSetPartStyleSetPartStyleset_part_style, disp_regiondisp_regionDispRegionDispRegionDispRegiondisp_region, disp_imagedisp_imageDispImageDispImageDispImagedisp_image, disp_colordisp_colorDispColorDispColorDispColordisp_color

模块

基础

算子