屏幕#

介绍 #

屏幕类别控制 V5 大脑的触摸屏，使机器人能够显示文本、数字和图形，并响应触摸输入。

默认情况下，打印到大脑的字体是等宽小号，它有 12 行 48 列。

对于绘画而言，大脑的分辨率为 479 x 239 像素。

V5 大脑屏幕，红色网格线显示了总共 12 行 48 列的布局。像素尺寸为 479 宽 x 239 高。左上角起始于 (0,0) 像素，位于第 1 行第 1 列；右下角结束于 (479, 239) 像素，位于第 12 行第/_static/img/screen/brain-resolution.png列。

以下是所有方法的列表：

光标打印 — 放置并打印文本。

print — Prints text at the current cursor position.
set_cursor — Sets the cursor to a specific row and column.
next_row — Moves the cursor to column 1 of the next row.
clear_row — Clears a row of text.
row — Returns the current cursor row.
column — Returns the current cursor column.
print_at — Prints text at a specific x and y location.
get_string_width — Returns the width of a string in pixels.
get_string_height — Returns the height of a string in pixels.
clear_line — Clears a line of text.
new_line — Moves the cursor to a new line.

修改器——更改屏幕设置、颜色和绘制行为。

clear_screen — Clears the screen of all drawings and text.
set_font — Sets the font for printed text.
set_pen_width — Sets the thickness for drawn shapes and lines.
set_pen_color — Sets the color for outlines and text.
set_fill_color — Sets the fill color for shapes and backgrounds.
set_origin — Sets a new origin for printing and drawing.

绘制 — 在屏幕上添加图形。

draw_pixel — Draws a pixel at a specific x and y position.
draw_line — Draws a line between two points.
draw_rectangle — Draws a rectangle.
draw_circle — Draws a circle.
render — Updates the Brain’s screen with text and drawings only when called.
set_clip_region — Restricts where drawings and text can appear.

触摸 — 获取屏幕触摸输入。

pressing — Returns whether the screen is being pressed.
x_position — Returns the X coordinate of the last screen event.
y_position — Returns the Y coordinate of the last screen event.

回调函数——响应屏幕上的触摸事件。

pressed — Registers a function to be called when the screen is pressed.
released — Registers a function to be called when the screen is released.

For information on constructing a Brain to gain access to the screen methods, see Brain.

set_cursor sets the cursor position. The cursor is placed at a specific row and column on the screen. How many rows and columns can comfortably fit depends on the selected font. With the default monospaced medium font, up to 8 rows and 13 columns can be displayed clearly. Text placed beyond this range may be cut off or become difficult to read.

Monospaced fonts have characters that are all the same width, making text placement consistent. In contrast, proportional fonts vary in character width, so some letters take up more space than others. However, regardless of which type is used, set_cursor positions the cursor based on row and column size, not font style. The font size can be adjusted using the set_font.

用法：

brain.screen.set_cursor(row, column)

参数	描述
`row`	光标所在的行。
`column`	光标所在的列。

# Display text starting at Row 3 Column 12
brain.screen.set_cursor(3, 12)
brain.screen.print("Row 3, Column 12")

V5 Brain 的屏幕截图，显示屏幕上方靠近中心位置打印的第 3 行第 12 列。

next_row #

next_row moves the cursor to the next row.

用法：

brain.screen.next_row()

参数	描述
	此方法没有参数。

# Print two lines of text on the Brain's screen
brain.screen.print("Line 1")
brain.screen.next_row()
brain.screen.print("Line 2")

V5 Brain 屏幕的截图，显示左上角有两行白色文字。上面一行是“第 1 行”，紧挨着它的第二行是“第 2 行”。

clear_row #

clear_row(row, color) clears a row to a single color.

用法：

brain.screen.clear_row(row, color)

参数	描述
`row`	可选。要清除的行。默认值为当前光标所在行。
`color`	可选。有效的颜色、十六进制值或网页字符串。

# Only keep the text on row 1
brain.screen.print("This text stays")
brain.screen.next_row
brain.screen.print("This text disappears")
wait(3, SECONDS)

brain.screen.clear_row()

row #

row returns the current row as an integer where text will be printed.

用法：

brain.screen.row()

参数	描述
	此方法没有参数。

# Display the cursor's current row
brain.screen.set_cursor(3, 2)
brain.screen.print(brain.screen.row())

V5 Brain 屏幕的屏幕截图，显示屏幕左上角第 3 行第 2 列位置的白色文字“3”。

column #

column returns the current column as an integer where text will be printed.

用法：

brain.screen.column()

参数	描述
	此方法没有参数。

# Display the cursor's current column
brain.screen.set_cursor(3, 15)
brain.screen.print(brain.screen.column())

V5 Brain 屏幕的屏幕截图，显示屏幕左上角第 3 行第 15 列位置的白色文字“15”。

print_at #

print_at(text, x, y, sep, precision, opaque) prints text at a specific x and y coordinates on the screen with the current font and origin.

用法：

brain.screen.print_at(text, x, y, sep, precision, opaque)

参数	描述
`text`	要打印的文本。
`x`	以关键字参数 (x=) 表示要打印的 x 坐标，参考屏幕原点。
`y`	打印位置的 y 坐标（y=），以屏幕原点为参考。
`sep`	Optional. A string to insert between values. This must be written as a keyword argument (sep=). The default is `” “`.
`precision`	Optional. The number of decimal places to display when printing simple numbers. This must be written as a keyword argument(`precision=`). The default is 2.
`opaque`	Optional. A boolean value indicating whether or not the text should clear background pixels. The default is `True`.

# Display text at the center of the screen
brain.screen.print_at("Center", x=220, y=120)

V5 Brain 屏幕的截图，屏幕中央显示白色文字“Center”。

get_string_width #

get_string_width(string) returns the width of a string in pixels as an integer as if it was on the Brain’s screen. The width of a string changes based on the length of the string and the size of the font.

Usage:
brain.screen.get_string_width(string)

参数	描述
`string`	待测量的绳子。

get_string_height #

get_string_height(string) returns the height of a string as an integer in pixels as if it was on the Brain’s screen. The height of a string changes based on the length of the string and the size of the font.

Usage:
brain.screen.get_string_height(string)

参数	描述
`string`	待测量的绳子。

clear_line #

clear_line clears the current row of text.

Usage: brain.screen.clear_line()

参数	描述
	此方法没有参数。

new_line #

new_line moves the cursor to a new line.

用法：

brain.screen.new_line()

参数	描述
	此方法没有参数。

变异体 #

clear_screen #

clear_screen(color) clears the whole screen to a single color.

用法：

brain.screen.clear_screen(color)

参数	描述
`color`	Optional. A valid color option: `Color.RED` `Color.GREEN` `Color.BLUE` `Color.YELLOW` `Color.ORANGE` `Color.PURPLE` `Color.CYAN` `Color.BLACK` (Default) `Color.WHITE`

参数

描述

color

Optional. A valid color option:

Color.RED
Color.GREEN
Color.BLUE
Color.YELLOW
Color.ORANGE
Color.PURPLE
Color.CYAN
Color.BLACK (Default)
Color.WHITE

# Print VEXcode on the screen
brain.screen.print("VEXcode")
wait(2, SECONDS)
# Clear screen to black
brain.screen.clear_screen()

# Print VEXcode on the screen
brain.screen.print("VEXcode")

# Clear screen to blue using predefined color
brain.screen.clear_screen(Color.BLUE)

V5 Brain 屏幕的截图，其中整个可打印区域呈亮蓝色。

set_font #

set_font(fontname) sets the font type used for printing text on the screen.

用法：

brain.screen.set_font(font)

参数	描述
`font`	以下是一个有效的字体选项。

`FontType.MONO12`	`FontType.MONO15`	`FontType.MONO20`
`FontType.MONO30`	`FontType.MONO40`	`FontType.MONO60`
`FontType.PROP20`	`FontType.PROP30`	`FontType.PROP40`
`FontType.PROP60`

# Set the font type to MONO40
brain.screen.set_font(FontType.MONO40)
brain.screen.print("VEX")

V5 Brain 屏幕的截图显示，左上角有白色的 VEX 字样，字体比默认字体大。

set_pen_width #

set_pen_width(width) sets the pen width used for drawing lines, rectangles, and circles.

用法：

brain.screen.set_pen_width(value)

参数	描述
`value`	笔的宽度，以像素为单位，范围从 0 到 32。

# Draw a rectangle with a pen width of 10
brain.screen.set_pen_width(10)
brain.screen.draw_rectangle(50, 50, 130, 60)

V5 Brain 屏幕的屏幕截图，显示屏幕左上角打印着一个带有粗边框的矩形。

set_pen_color #

set_pen_color sets the pen color used for drawing lines, rectangles, and circles.

用法：

brain.screen.set_pen_color(color)

参数	描述
`color`	A valid color option: `Color.RED` `Color.GREEN` `Color.BLUE` `Color.YELLOW` `Color.ORANGE` `Color.PURPLE` `Color.CYAN` `Color.TRANSPARENT` `Color.WHITE` You can also specify a custom color.

参数

描述

color

A valid color option:

Color.RED
Color.GREEN
Color.BLUE
Color.YELLOW
Color.ORANGE
Color.PURPLE
Color.CYAN
Color.TRANSPARENT
Color.WHITE

custom color

# Draw a rectangle with orange borders
brain.screen.set_pen_color(Color.ORANGE)
brain.screen.draw_rectangle(50, 50, 130, 60)

V5 Brain 屏幕的截图，显示屏幕左上角有一个橙色矩形。

set_fill_color #

set_fill_color sets the fill color used for drawing rectangles and circles.

用法：

brain.screen.set_fill_color(color)

参数	描述
`color`	A valid color option: `Color.RED` `Color.GREEN` `Color.BLUE` `Color.YELLOW` `Color.ORANGE` `Color.PURPLE` `Color.CYAN` `Color.TRANSPARENT` `Color.WHITE` You can also specify a custom color.

参数

描述

color

A valid color option:

Color.RED
Color.GREEN
Color.BLUE
Color.YELLOW
Color.ORANGE
Color.PURPLE
Color.CYAN
Color.TRANSPARENT
Color.WHITE

custom color

# Draw a purple rectangle
brain.screen.set_fill_color(Color.PURPLE)
brain.screen.draw_rectangle(50, 130, 100, 60)

V5 Brain 屏幕的截图，显示屏幕左下角有一个填充紫色的矩形。

set_origin #

set_origin sets the origin used for drawing graphics on the Brain’s screen. Drawing functions consider the top left corner of the Brain’s screen as the origin. This function can move the origin to an alternate position such as the center of the Brain’s screen.

用法：

brain.screen.set_origin(x, y)

参数	描述
`x`	原点相对于左上角的 x 坐标，取值范围为 0 到 480 的整数。
`y`	原点相对于左上角的 y 坐标，取值范围为 0 到 240 的整数。

画 #

draw_pixel #

draw_pixel draws a pixel using the current pen color.

用法：

brain.screen.draw_pixel(x, y)

参数	描述
`x`	相对于屏幕原点的像素的 x 坐标。
`y`	相对于屏幕原点的 y 坐标，用于绘制像素。

# Draw the pixels marking the corners of a square
brain.screen.draw_pixel(250, 100)
brain.screen.draw_pixel(275, 100)
brain.screen.draw_pixel(250, 125)
brain.screen.draw_pixel(275, 125)

draw_line #

draw_line draws a line using the current pen color.

用法：

brain.screen.draw_line(start_x, start_y, end_x, end_y)

参数	描述
`start_x`	以屏幕原点为参考的线段起始点的 x 坐标。
`start_y`	线段起始点相对于屏幕原点的 y 坐标。
`end_x`	线段末端相对于屏幕原点的 x 坐标。
`end_y`	线段末端相对于屏幕原点的 y 坐标。

# Draw a line from the top left to bottom right of the screen
brain.screen.draw_line(0, 0, 479, 239)

V5 Brain 屏幕的截图显示，屏幕中心有一条细斜线，从左上角延伸到右下角。

draw_rectangle #

draw_rectangle draws a rectangle on the screen using the current pen and fill colors.

用法：

brain.screen.draw_rectangle(x, y, width, height, color)

参数	描述
`x`	矩形左上角的 x 坐标（像素），取值范围为 0 到 479。
`y`	矩形左上角的 y 坐标（像素），取值范围为 0 到 239。
`width`	矩形的宽度。
`height`	矩形的高度。
`color`	Optional. A valid color option: `Color.RED` `Color.GREEN` `Color.BLUE` `Color.YELLOW` `Color.ORANGE` `Color.PURPLE` `Color.CYAN` `Color.TRANSPARENT` `Color.WHITE` You can also specify a custom color.

# Draw a rectangle on the screen
brain.screen.draw_rectangle(50, 50, 130, 60)

V5 大脑屏幕的截图显示，左上象限打印着一个带有细白边框的矩形。

draw_circle #

draw_circle(x, y, radius, color) draws a circle using the current pen and fill colors.

用法：

brain.screen.draw_circle(x, y, radius, color)

参数	描述
`x`	圆心相对于屏幕原点的 x 坐标。
`y`	圆心相对于屏幕原点的 y 坐标。
`radius`	圆的半径。
`color`	Optional. A valid color option: `Color.RED` `Color.GREEN` `Color.BLUE` `Color.YELLOW` `Color.ORANGE` `Color.PURPLE` `Color.CYAN` `Color.TRANSPARENT` `Color.WHITE` You can also specify a custom color.

# Draw a circle on the screen
brain.screen.draw_circle(120, 120, 40)

V5 Brain 屏幕的截图显示，中心画有一个带有细白边框的圆圈。

render #

render enables double buffering for the Brain’s screen. Once called, any drawing commands (like text, shapes, or images) will no longer appear immediately for the rest of the project. Instead, updates will only be shown when render is used again. This allows for smoother and more controlled screen updates, but means nothing will be visible until render is used.

用法：

brain.screen.render()

参数	描述
	此方法没有参数。

# Render text after moving
brain.screen.render()
brain.screen.print("Render later...")
drivetrain.drive_for(FORWARD, 100, MM)
drivetrain.turn_for(RIGHT, 90, DEGREES)
brain.screen.render()

set_clip_region #

set_clip_region defines a rectangular area on the screen where all drawings and text will be confined. Any content outside this region will not be displayed.

用法：

brain.screen.set_clip_region(x, y, width, height)

参数	描述
`x`	矩形左上角的 x 坐标，以屏幕原点为参考。
`y`	矩形左上角的 y 坐标，以屏幕原点为参考。
`width`	矩形的宽度。
`height`	矩形的高度。

# Restrict text and drawings to a specific region
brain.screen.set_clip_region(0, 0, 120, 120)
brain.screen.draw_rectangle(60, 60, 100, 100, Color.RED)
brain.screen.print_at("Cut off!", x=60, y=60)

V5 Brain 屏幕的屏幕截图，白色文字显示“Cut of”，其正下方有一个实心红色方块，位于屏幕左上角，显示剪辑区域内打印的内容。

触碰 #

pressing #

pressing returns whether the screen is currently being pressed (touched).

True - The screen is being pressed.
False - The screen is not being pressed.

用法：

brain.screen.pressing()

参数	描述
	此方法没有参数。

# Change the screen's color after it's pressed
while not brain.screen.pressing():
    wait(5, MSEC)
brain.screen.set_fill_color(Color.GREEN)
brain.screen.draw_rectangle(0, 0, 479, 239)

# Display different messages after the screen is pressed
while not brain.screen.pressing():
    wait(5, MSEC)
brain.screen.print("First message!")
brain.screen.next_row()
# Lift finger to press the screen again
while brain.screen.pressing():
    wait(5, MSEC)
while not brain.screen.pressing():
    wait(5, MSEC)
brain.screen.print("Second message!")
brain.screen.next_row()

x_position #

x_position returns the X coordinate of the last screen event, press or release as an integer.

用法：

brain.screen.x_position()

参数	描述
	此方法没有参数。

# Display a circle where the screen is pressed
while not brain.screen.pressing():
    wait(5, MSEC)
brain.screen.set_fill_color(Color.WHITE)
brain.screen.draw_circle(brain.screen.x_position(), brain.screen.y_position(), 20)

y_position #

y_position returns the Y coordinate of the last screen event, press or release as an integer.

用法：

brain.screen.y_position()

参数	描述
	此方法没有参数。

# Display a circle where the screen is pressed
while not brain.screen.pressing():
    wait(5, MSEC)
brain.screen.set_fill_color(Color.WHITE)
brain.screen.draw_circle(brain.screen.x_position(), brain.screen.y_position(), 20)

回调函数 #

pressed #

pressed registers a function to be called when the Brain’s Screen is pressed.

用法：

brain.screen.pressed(callback, arg)

参数	描述
`callback`	一个先前定义的函数，当按下大脑屏幕时执行。
`arg`	可选。包含要传递给回调函数的参数的元组。有关更多信息，请参阅使用带参数的函数。

def my_function():
  brain.screen.print("Screen pressed")

# Call my_function whenever the Brain screen is pressed
brain.screen.pressed(my_function)

released #

released registers a function to be called when the screen is released (touch removed).

用法：

brain.screen.released(callback, arg)

参数	描述
`callback`	先前定义的函数在大脑屏幕释放时执行。
`arg`	可选。包含要传递给回调函数的参数的元组。有关更多信息，请参阅使用带参数的函数。

def my_function():
  brain.screen.print("Screen released")

# Call my_function whenever the Brain screen is released
brain.screen.released(my_function)

屏幕#

介绍 #

光标打印 #

print #

set_cursor #

next_row #

clear_row #

row #

column #

print_at #

get_string_width #

get_string_height #

clear_line #

new_line #

变异体 #

clear_screen #

set_font #

set_pen_width #

set_pen_color #

set_fill_color #

set_origin #

画 #

draw_pixel #

draw_line #

draw_rectangle #

draw_circle #

render #

set_clip_region #

触碰 #

pressing #

x_position #

y_position #

回调函数 #

pressed #

released #