Pantalla

Introducción

The Screen methods control how the VEX AIR Drone Controller shows text, numbers, graphics, and images on its screen, and how it responds to screen presses.

Below is a list of available methods:

Cursor Print – Display text and manage the print cursor.

• print – Prints text, numbers, or variable values at the current cursor position.

• set_cursor – Moves 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.

• get_row – Returns the row where text will be printed.

• get_column – Returns the column where text will be printed.

XY Print – Print text at pixel-based coordinates.

• print_at – Prints text, numbers, or variable values at a specific x and y coordinate.

• set_origin – Sets the origin used for coordinate-based printing and drawing.

Mutators – Change screen settings, colors, and drawing behavior.

• clear_screen – Clears all drawings, text, and images from the controller screen.

• wait_for_render – Switches screen drawing to render-later behavior.

• set_font – Sets the font for printed text.

• set_pen_width – Sets the thickness of drawn lines and shape outlines.

• set_pen_color – Sets the color of text, pixels, lines, and shape outlines.

• set_text_fill_color – Sets the fill color behind printed text.

• set_fill_color – Sets the fill color for drawn shapes.

Dibujar – Agregar gráficos e imágenes a la pantalla.

• draw_pixel – Draws one pixel at a specific x and y position.

• draw_line – Draws a line between two points.

• draw_rectangle – Draws a rectangle using the current pen and fill colors.

• draw_circle – Draws a circle using the current pen and fill colors.

• show_file – Draws an uploaded image.

Táctil: detecta y responde a las pulsaciones de la pantalla.

• pressing – Returns whether the screen is currently being pressed.

• x_position – Returns the x-coordinate of the last screen press.

• y_position – Returns the y-coordinate of the last screen press.

Callbacks – Run functions when the screen is pressed or released.

• pressed – Registers a function to call when the screen is pressed.

• released – Registers a function to call when the screen is released.

Cursor Imprimir

print

print prints text, numbers, or variable values on the controller screen at the current cursor position and font.

Usage:
controller.screen.print(text)

Parámetros	Descripción
text	The text, number, or variable value to print on the screen.
sep	Optional. The separator between printed text. By default, sep = ’ ‘
end	Optional. The string appended after the last printed text. By default, end = ‘\n’
precision	Optional. The number of decimals a float will print with as an integer. By default, precision = 5

# Display a message at the starting cursor position.
controller.screen.print("Time to fly!")

# Display the first 2 decimals of pi
controller.screen.print(3.1415, precision = 2)

set_cursor

set_cursor moves the cursor to a specific row and column on the controller screen. The next print call will start printing at that location. The row and column spacing will take into account the selected font. With the default monospaced medium font, the screen can clearly display up to 18 rows and 53 columns. Text placed beyond this range may be cut off or harder to read.

Usage:
controller.screen.set_cursor(row, col)

Parámetros	Descripción
row	The row to move the cursor to.
column	The column to move the cursor to.

# Display text starting at Row 7 Column 25.
controller.screen.set_cursor(row=7, col=25)
controller.screen.print("Row 7, Column 25")

next_row

next_row moves the cursor to column 1 on the next row on the controller screen.

Usage:
controller.screen.next_row()

Parámetros	Descripción
	Este método no tiene parámetros.

# Display two lines of text.
controller.screen.print("Line 1")
controller.screen.next_row()
controller.screen.print("Line 2")

clear_row

clear_row clears a row of text on the controller screen.

Usage:
controller.screen.clear_row(row, color)

Parámetro	Descripción
row	Opcional. La fila que se va a borrar. El valor predeterminado es la fila actual del cursor.
color	Optional. The color to apply to the cleared row. If a color is not specified, the set_fill_color is used. Options include: BLACK BLUE CYAN GREEN ORANGE PURPLE RED TRANSPARENT WHITE YELLOW You can also specify a custom color.

# Clear only the second row of text
controller.screen.print("This text stays")
controller.screen.next_row()
controller.screen.print("This text disappears")
wait(3, SECONDS)
controller.screen.clear_row(2)

# Turn the 5th row green.
controller.screen.clear_row(5, GREEN)

get_row

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

Usage:
controller.screen.get_row()

Parámetros	Descripción
	Este método no tiene parámetros.

# Display the cursor's current row.
controller.screen.set_cursor(row=7, col=25)
controller.screen.print(controller.screen.get_row())

get_column

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

Usage:
controller.screen.get_column()

Parámetros	Descripción
	Este método no tiene parámetros.

# Display the cursor's current column.
controller.screen.set_cursor(row=7, col=25)
controller.screen.print(controller.screen.get_column())

Impresión XY

print_at

print_at prints text, numbers, or variable values on the controller screen at a specific (x, y) position in pixels, using the current font and origin. x sets how far from the left side the text begins, and y sets where the bottom of the letters sit. This method disregards the current cursor position.

Usage:
controller.screen.print_at(text, x, y)

Parámetro	Descripción
text	The text, number, or variable value to print on the screen.
x	La posición horizontal del texto, como un entero de 0 a 640 píxeles. 0 es izquierda; 640 es derecha.
y	La posición vertical del texto, como un entero de 0 a 480 píxeles. 0 es la parte superior; 480 es la parte inferior.

# Display a message in the middle of the screen.
controller.screen.print_at("Hello, drone!", x=320, y=240)

set_origin

set_origin sets the origin (0, 0) used for drawing and coordinate-based printing on the controller screen. By default, the origin is the top-left corner of the screen. This method can reset the origin to an alternate (x, y) screen coordinate location.

Usage:
controller.screen.set_origin(x, y)

Parámetro	Descripción
x	La nueva coordenada x que se establecerá como origen, expresada como un entero de 0 a 640.
y	La nueva coordenada y que se establecerá como origen, expresada como un número entero entre 0 y 480.

# Set the origin to the center of the screen.
controller.screen.set_origin(x=320, y=240)

# Draw a rectangle at the new origin.
controller.screen.draw_rectangle(x=0, y=0, width=80, height=40)

Mutadores

clear_screen

clear_screen clears all drawings, text, and images from the controller screen.

Usage:
controller.screen.clear_screen(row, col, color)

Parámetro	Descripción
row	Optional. The row to move the cursor to after clearing the screen. The default is 1.
col	Optional. The column to move the cursor to after clearing the screen. The default is 1.
color	Optional. Sets the screen color. If row and col are included, use color as the third argument. Options include: BLACK BLUE CYAN GREEN ORANGE PURPLE RED TRANSPARENT WHITE YELLOW You can also specify a custom color.

# Draw a circle, and clear it after 2 seconds.
controller.screen.draw_circle(x=320, y=240, radius=80)
wait(2, SECONDS)
controller.screen.clear_screen()

# Print two messages in the same spot
controller.screen.print("Hello!")
wait(3,SECONDS)
controller.screen.clear_screen(row=1, col=1)
controller.screen.print("Goodbye!")

# Set the background color of the screen to red.
controller.screen.clear_screen(color=RED)

wait_for_render

wait_for_render switches screen drawing to render-later behavior. Once this method runs, following screen commands will not appear on the controller screen until the next wait_for_render method runs.

Note: Use this before drawing a group of text, shapes, or images, then use it again to render the full update at once.

Usage:
controller.screen.wait_for_render()

Parámetro	Descripción
	Este método no tiene parámetros.

# Display text and images when button 7 is pressed.
controller.screen.wait_for_render()
controller.screen.print("Screen rendered!")
controller.screen.draw_circle(x=320, y=240, radius=80)
while not controller.button7.pressing():
    wait(5, MSEC)
controller.screen.wait_for_render()

set_font

set_font sets the font used for displaying text on the controller screen. This font will apply to all text printed after this method runs. The default font at the start of a project is MONO20.

Usage:
controller.screen.set_font(fontname)

Parámetro	Descripción
fontname	Sets the font to one of the following: MONO12 MONO15 MONO20 MONO24 MONO30 MONO36 MONO40 MONO60 PROP20 PROP24 PROP30 PROP36 PROP40 PROP60

MONO12	MONO15	MONO20
MONO24	MONO30	MONO36
MONO40	MONO60	PROP20
PROP24	PROP30	PROP36
PROP40	PROP60

# Display text using a larger font.
controller.screen.set_font(MONO40)
controller.screen.print("VEX")

set_pen_width

set_pen_width sets the thickness of drawn lines and shape outlines.

Usage:
controller.screen.set_pen_width(width)

Parámetro	Descripción
width	El ancho del lápiz, expresado como un número entero en píxeles.

# Draw a rectangle with a pen width of 10.
controller.screen.set_pen_width(10)
controller.screen.draw_rectangle(x=200, y=200, width=200, height=80)

set_pen_color

set_pen_color sets the color of text, pixels, lines, and shape outlines.

Usage:
controller.screen.set_pen_color(color)

Parámetro	Descripción
color	Optional. Sets the pen and font color. Options include: BLACK BLUE CYAN GREEN ORANGE PURPLE RED TRANSPARENT WHITE YELLOW You can also specify a custom color.

# Draw a rectangle with an orange outline.
controller.screen.set_pen_color(ORANGE)
controller.screen.draw_rectangle(x=200, y=150, width=240, height=150)
controller.screen.set_pen_color(WHITE)
controller.screen.print_at("VEXcode AIR", x=250, y=220)

set_text_fill_color

set_text_fill_color sets the fill color behind printed text. The default text fill color is transparent.

Usage:
controller.screen.set_text_fill_color(color)

Parámetro	Descripción
color	Optional. Sets the text fill color. Options include: BLACK BLUE CYAN GREEN ORANGE PURPLE RED TRANSPARENT WHITE YELLOW You can also specify a custom color.

# Display two colors behind text
controller.screen.set_text_fill_color(RED)
controller.screen.print("Red")
controller.screen.next_row()
controller.screen.set_text_fill_color(BLUE)
controller.screen.print("Blue")

Captura de pantalla de la pantalla del controlador del dron VEX AIR con dos líneas de texto impresas en la esquina superior izquierda. La primera dice “Rojo” en texto blanco con resaltado rojo, la segunda, justo debajo, dice “Azul” en texto blanco con resaltado azul.

set_fill_color

set_fill_color sets the fill color used when shapes are drawn. The default fill color is black.

Usage:
controller.screen.set_fill_color(color)

Parámetro	Descripción
color	Optional. Sets the fill color. Options include: BLACK BLUE CYAN GREEN ORANGE PURPLE RED TRANSPARENT WHITE YELLOW You can also specify a custom color.

# Draw an orange-filled rectangle with text on top
controller.screen.set_fill_color(ORANGE)
controller.screen.draw_rectangle(x=200, y=150, width=250, height=150)
controller.screen.print_at("VEXcode AIR", x=250, y=220)

Dibujar

draw_pixel

draw_pixel draws one pixel at the selected x and y coordinate using the current pen color.

Usage:
controller.screen.draw_pixel(x, y)

Parámetro	Descripción
x	La coordenada x donde se dibujará el píxel, expresada como un número entero de 0 a 640.
y	La coordenada y donde se dibujará el píxel, expresada como un número entero de 0 a 480.

# Draw five pixels in a diagonal.
controller.screen.draw_pixel(x=360, y=200)
controller.screen.draw_pixel(x=340, y=220)
controller.screen.draw_pixel(x=320, y=240)
controller.screen.draw_pixel(x=300, y=260)
controller.screen.draw_pixel(x=280, y=280)

draw_line

draw_line draws a line from the first screen coordinate (x1, y1) to the second screen coordinate (x2, y2) using the current pen width and pen color.

The x and y-coordinates use the default origin of (0, 0) unless a different origin has been set using set_origin.

Usage:
controller.screen.draw_line(x1, y1, x2, y2)

Parámetro	Descripción
x1	La coordenada x inicial de la línea, expresada como un número entero entre 0 y 640.
y1	La coordenada y inicial de la línea, expresada como un número entero entre 0 y 480.
x2	La coordenada x final de la línea, expresada como un número entero entre 0 y 640.
y2	La coordenada y final de la línea, expresada como un número entero entre 0 y 480.

# Make an X across the screen.
controller.screen.draw_line(x1=0, y1=0, x2=640, y2=480)
controller.screen.set_pen_color(CYAN)
controller.screen.draw_line(x1=0, y1=480, x2=640, y2=0)

draw_rectangle

draw_rectangle draws a rectangle using the current pen width, pen color, and fill color, unless the optional color parameter is used.

The x and y-coordinates use the default origin of (0, 0) unless a different origin has been set using set_origin.

Usage:
controller.screen.draw_rectangle(x, y, width, height, color)

Parámetro	Descripción
x	La coordenada x de la esquina superior izquierda del rectángulo, expresada como un número entero de 0 a 640.
y	La coordenada y de la esquina superior izquierda del rectángulo, expresada como un número entero de 0 a 480.
width	El ancho del rectángulo, expresado como un número entero de 0 a 640.
height	La altura del rectángulo, expresada como un número entero de 0 a 480.
color	Optional. Sets the fill color of the rectangle. Options include: BLACK BLUE CYAN GREEN ORANGE PURPLE RED TRANSPARENT WHITE YELLOW You can also specify a custom color.

# Draw two rectangles on the screen.
controller.screen.draw_rectangle(x=0, y=0, width=620, height=460)
controller.screen.draw_rectangle(x=200, y=180, width=200, height=100, color=GREEN)

draw_circle

draw_circle draws a circle using the current pen width, pen color, and fill color, unless the optional color parameter is used.

The x and y-coordinates use the default origin of (0, 0) unless a different origin has been set using set_origin.

Usage:
controller.screen.draw_circle(x, y, radius, color)

Parámetro	Descripción
x	La coordenada x del centro del círculo, expresada como un número entero de 0 a 640.
y	La coordenada y del centro del círculo, expresada como un número entero de 0 a 480.
radius	El radio del círculo, expresado como un número entero de 0 a 480 píxeles.
color	Optional. Sets the fill color of the circle. Options include: BLACK BLUE CYAN GREEN ORANGE PURPLE RED TRANSPARENT WHITE YELLOW You can also specify a custom color.

# Draw one green circle on the screen.
controller.screen.set_fill_color(GREEN)
controller.screen.draw_circle(x=320, y=240, radius=200, color=GREEN)

show_file

show_file draws a custom uploaded image on the controller screen at an x and y position, with optional scaling, rotation, and alpha transparency.

Usage:
controller.screen.show_file(file, x, y, scale_width, scale_height, rotation, use_alpha)

Parámetro	Descripción
file	La imagen subida por el usuario que se usará. Las opciones cambiarán si se editan los nombres de las imágenes en el Panel de control.
x	El desplazamiento horizontal de la imagen, expresado como un entero en píxeles. Los valores positivos lo desplazan hacia la derecha; los negativos, hacia la izquierda.
y	El desplazamiento vertical de la imagen, expresado como un entero en píxeles. Los valores positivos lo desplazan hacia abajo; los negativos, hacia arriba.
scale_width	Opcional. El ancho de la imagen a la que se escala, expresado como un entero en píxeles.
scale_height	Opcional. La altura de la imagen a la que se escala, expresada como un entero en píxeles.
rotation	Optional. The number of degrees to rotate the image, given as an integer from 0 to 359.
use_alpha	Optional. Whether to use the image’s alpha channel for transparency. Options include: True or False.

# Display uploaded Image 1 in the top left corner.
controller.screen.show_file(IMAGE1, x=0, y=0)

# Display uploaded Image 1 scaled to the full screen.
controller.screen.show_file(IMAGE1, x=65, y=0, scale_width=640, scale_height=480)

# Display uploaded Image 1 with rotation of 180 degrees.
controller.screen.show_file(IMAGE1, x=-65, y=0, rotation=180)

# Upload an image with a transparent background.
# Display uploaded Image 1 with alpha channel enabled.
controller.screen.show_file(IMAGE1, x=0, y=0, use_alpha=True)

Tocar

pressing

pressing returns a Boolean indicating whether the robot’s screen is currently being pressed.

• True – The screen is being pressed.

• False – The screen is not being pressed.

Usage:
controller.screen.pressing()

Parámetros	Descripción
	Este método no tiene parámetros.

# Play a sound when the screen is pressed.
while True:
    if controller.screen.pressing():
        controller.sound.play_note("C5", 500)
    wait(5, MSEC)

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

x_position

x_position returns the x-coordinate in pixels where the screen was last pressed, as an integer from 0 (left) to 640 (right).

Usage:
controller.screen.x_position()

Parámetros	Descripción
	Este método no tiene parámetros.

# Play a high or low note based on where screen is pressed.
while True:
    if controller.screen.pressing():
        if controller.screen.x_position() > 320:
            controller.sound.play_note("C6", 500)
        else:
            controller.sound.play_note("C4", 500)
    wait(5, MSEC)

y_position

y_position returns the y-coordinate in pixels where the screen was last pressed, as an integer from 0 (top) to 480 (bottom).

Usage:
controller.screen.y_position()

# Play a high or low note based on where screen is pressed.
while True:
    if controller.screen.pressing():
        if controller.screen.y_position() > 240:
            controller.sound.play_note("C6", 500)
        else:
            controller.sound.play_note("C4", 500)
    wait(5, MSEC)

Callbacks

pressed

pressed registers a function to be called when the controller screen is pressed.

Usage:
controller.screen.pressed(callback, arg)

Parámetros	Descripción
callback	A function that is previously defined to execute when the controller screen is pressed.
arg	Optional. A tuple containing arguments to pass to the callback function. See Using Functions with Parameters for more information.

# Play a sound when the screen is pressed.
def play_sound():
    controller.sound.play_note("C5", 500)

controller.screen.pressed(play_sound)

released

released registers a function to be called when the controller screen is released.

Usage:
controller.screen.released(callback, arg)

Parámetros	Descripción
callback	A function that is previously defined to execute when the controller screen is released.
arg	Optional. A tuple containing arguments to pass to the callback function. See Using Functions with Parameters for more information.

# Play a sound when the screen is pressed.
def play_sound():
    controller.sound.play_note("C5", 500)

controller.screen.released(play_sound)