Class «display»

This article is automatically translated from Russian by Google Translator.

Provides access to the display of the robot.

Screen size: 240*320 pixels.

Method	Description
addLabel	Print the specified text on the screen, starting from the specified coordinate.
clear	Clear the drawing window.
drawArc	Draw an arc of an ellipse inscribed into a rectangle with the upper left corner at specified coordinates and having a given width and height.
drawEllipse	Draw an ellipse inscribed into a rectangle with the upper left corner at specified coordinates and having a given width and height.
drawLine	Draw a line with the beginning and the end at the given coordinates.
drawPoint	Draw a point at given coordinates.
drawRect	Draw a rectangle with the upper left corner at the specified coordinates and having the specified width and height.
hide	Close and clear the drawing window.
redraw	Redraw the window to draw. The changes to the display will only happen after this method is called.
removeLabels	Remove from the screen all text added to it by calls to the "addLabel" method.
setBackground	Set the screen background to the color you specify.
setPainterColor	Set the color of the brush used to draw the graphical primitives.
setPainterWidth	Set the thickness of the brush used to draw the graphical primitives, in pixels.
show	Display the image generated in the one-dimensional array on the controller.
showImage	Display the image previously loaded on the robot.

addLabel

Print the specified text on the screen, starting from the specified coordinate. If there was already text in the specified coordinates, it will be replaced by the new text.

The changes on the display will occur only after calling the method "redraw".

JavaScript

brick.display().addLabel("text", x, y);

Python

brick.display().addLabel("text", x, y);

Parameters:

• text — display text,

• x, y — screen coordinates.

Example

JavaScript

brick.display().addLabel('Hello, world!', 1, 1);

brick.display().addLabel('Hello, world!', 1, 1);

clear

Clear the drawing window.

JavaScript

brick.display().clear();

brick.display().clear();

drawArc

Draw an arc of an ellipse inscribed into a rectangle with the upper left corner at specified coordinates and having a given width and height. The changes on the display will occur only after calling the method "redraw".

JavaScript

brick.display().drawArc(x, y, l, h, from, to);

Python

brick.display().drawArc(x, y, l, h, from, to);

Parameters:

• x, y — the coordinates of the upper left corner of the rectangle on the screen,

• l — rectangle width,

• h — rectangle height,

• from — initial angle bounding the arc,

• to — finite angle bounding the arc.

Example

JavaScript

brick.display().drawArc(0, 0, 10, 10, 20, 50);

Python

brick.display().drawArc(0, 0, 10, 10, 20, 50);

drawEllipse

Draw an ellipse inscribed into a rectangle with the upper left corner at specified coordinates and having a given width and height. The changes on the display will occur only after calling the method "redraw".

JavaScript

brick.display().drawEllipse(x, y, l, h);

Python

brick.display().drawEllipse(x, y, l, h);

Parameters:

• x, y — coordinates of the upper left corner of the rectangle,

• l — rectangle width,

• h — rectangle height.

Example

JavaScript

brick.display().drawEllipse(0, 0, 10, 10);

Python

brick.display().drawEllipse(0, 0, 10, 10);

drawLine

Draw a line with the beginning and the end at the given coordinates. The changes on the display will occur only after calling the method "redraw".

JavaScript

brick.display().drawLine(x0, y0, x1, y1);

Python

brick.display().drawLine(x0, y0, x1, y1);

Parameters:

• x0, y0 — line origin coordinates,

• x1, y1 — line end coordinates.

Example

JavaScript

brick.display().drawLine(0, 0, 10, 10);

Python

brick.display().drawLine(0, 0, 10, 10);

drawPoint

Draw a point at given coordinates. The changes on the display will occur only after calling the method "redraw".

JavaScript

brick.display().drawPoint(x, y);

Python

brick.display().drawPoint(x, y);

Parameters:

• point coordinates x, y.

Example

JavaScript

brick.display().drawPoint(10, 10);

Python

brick.display().drawPoint(10, 10);

drawRect

Draw a rectangle with the upper left corner at the specified coordinates and having the specified width and height. The changes on the display will occur only after calling the method "redraw".

JavaScript

brick.display().drawRect(x, y, l, h);

Python

brick.display().drawRect(x, y, l, h);

Parameters:

• x, y — coordinates of the upper left corner of the rectangle,

• l — rectangle width,

• h — rectangle height.

Example

JavaScript

brick.display().drawRect(0, 0, 10, 10);

Python

brick.display().drawRect(0, 0, 10, 10);

hide

Close and clear the drawing window.

JavaScript

brick.display().hide();

Python

brick.display().hide();

redraw

Redraw the window to draw. The changes to the display will only happen after this method is called.

JavaScript

brick.display().redraw();

Python

brick.display().redraw();

removeLabels

Remove from the screen all text added to it by calls to the "addLabel" method.

JavaScript

brick.display().removeLabels();

Python

brick.display().removeLabels();

setBackground

Set the screen background to the color you specify.

Available colors:

• white,

• red, darkRed,

• green, darkGreen,

• blue, darkBlue,

• cyan, darkCyan,

• magenta, darkMagenta,

• yellow, darkYellow,

• gray, darkGray, lightGray,

• black.

JavaScript

brick.display().setBackground("color");

Python

brick.display().setBackground("color");

As a parameter, you must specify the color.

Example

JavaScript

brick.display().setBackground("red");

Python

brick.display().setBackground("red");

setPainterColor

Set the color of the brush used to draw the graphical primitives.

Available colors:

• white,

• red, darkRed,

• green, darkGreen,

• blue, darkBlue,

• cyan, darkCyan,

• magenta, darkMagenta,

• yellow, darkYellow,

• gray, darkGray, lightGray,

• black.

JavaScript

brick.display().setPainterColor("color");

Python

brick.display().setPainterColor("color");

As a parameter, you must specify the color.

Example

JavaScript

brick.display().setPainterColor("red");

Python

brick.display().setPainterColor("red");

setPainterWidth

Set the thickness of the brush used to draw the graphical primitives, in pixels.

JavaScript

brick.display().setPainterWidth(d);

Python

brick.display().setPainterWidth(d);

As a parameter, you must specify the thickness d.

Example

JavaScript

brick.display().setPainterWidth(5);

Python

brick.display().setPainterWidth(5);

show

Display the image generated in the one-dimensional array on the controller.

JavaScript

brick.display().show(array, width, height, format)

Python

brick.display().show(array, width, height, format)

Parameters:

• array — a one-dimensional integer array with dimensions width×height

• width и height — the width and height of the image, respectively

• The format in which each element of the array is represented should be passed as the format parameter. The formats currently supported are: «rgb32», «grayscale8», «rgb888».

Example

Examples of using show() on an image taken withgetPhoto().

JavaScript

//rgb32
var photo = getPhoto();
brick.display().show(photo, 160, 120, "rgb32");
script.wait(5000);

//rgb888
pic = []
photo = getPhoto();
l = photo.length;
for (i = 0; i < l; i++) {
    var p = photo[i];
    pic.push((p&0xff0000)>>16);
    pic.push((p&0xff00)>>8);
    pic.push((p&0xff));
}
brick.display().show(pic, 160, 120, "rgb888");
script.wait(5000);                            

//grayscale8                                   
pic = []                                      
photo = getPhoto();
l = photo.length;                             
for (i = 0; i < l; i++) {                     
        var p = photo[i];                     
        pic.push(((p&0xff0000)>>18) + ((p&0xff00)>>10) + ((p&0xff)>>2));                
}                                             
                                              
brick.display().show(pic, 160, 120, "grayscale8");
script.wait(5000);

Python

#rgb32
photo = getPhoto();
brick.display().show(photo, 160, 120, "rgb32");
script.wait(5000);

#rgb888
pic = []
photo = getPhoto();
l = len(photo);
for i in range(l):
    p = photo[i];
    pic.append((p&0xff0000)>>16);
    pic.append((p&0xff00)>>8);
    pic.append((p&0xff));

brick.display().show(pic, 160, 120, "rgb888");
script.wait(5000);                            

#grayscale8                                   
pic = []                                      
photo = getPhoto();
l = len(photo);                             
for i in range(l):                    
    p = photo[i];                     
    pic.append(((p&0xff0000)>>18) + ((p&0xff00)>>10) + ((p&0xff)>>2));                
                                         
                                              
brick.display().show(pic, 160, 120, "grayscale8");
script.wait(5000);

showImage

Display the image previously loaded on the robot.

JavaScript

brick.display().showImage("imagePath");

Python

brick.display().showImage("imagePath");

The name of the image file (in BMP, GIF, JPG, JPEG, PNG, PBM, PGM, PPM, TIFF, XBM, XPM formats) must be specified as a parameter, the path is specified either as absolute or relative to the trik folder.

Example

JavaScript

brick.display().showImage("media/trik_smile_sad.png");

Python

brick.display().showImage("media/trik_smile_sad.png");