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PYGLET – Caret

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  • Last Updated : 29 Jun, 2021
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In this article we will see how we can use caret object on the window in PYGLET module in python. Pyglet is easy to use but powerful library for developing visually rich GUI applications like games, multimedia etc. A window is a “heavyweight” object occupying operating system resources. Windows may appear as floating regions or can be set to fill an entire screen (fullscreen). Caret is basically visible text insertion marker for pyglet.text.layout.IncrementalTextLayout. The caret is drawn as a single vertical bar at the document position on a text layout object. If mark is not None, it gives the unmoving end of the current text selection. The visible text selection on the layout is updated along with mark and position. By default the layout’s graphics batch is used, so the caret does not need to be drawn explicitly. Even if a different graphics batch is supplied, the caret will be correctly positioned and clipped within the layout.
We can create a window with the help of command given below 
 

 pyglet.window.Window(width, height, title)

 

In order to create window we use pyglet.text.caret.Caret method
Syntax : pyglet.text.caret.Caret(layout, color=(255, 255, 255))
Argument : It takes 2 argument, first is layout and second is the color
Return : It returns Caret object 
 

Below is the implementation 
 

Python3




# importing pyglet module
import pyglet
import pyglet.window.key
 
# width of window
width = 500
 
# height of window
height = 500
 
# caption i.e title of the window
title = "Geeksforgeeks"
 
# creating a window
window = pyglet.window.Window(width, height, title)
 
# text
text = "Welcome to GeeksforGeeks"
 
# batch object
batch = pyglet.graphics.Batch()
 
# creating document
document = pyglet.text.document.FormattedDocument(text)
 
# setting style to the document
document.set_style(0, len(document.text), dict(font_name ='Arial', font_size = 16, color =(255, 255, 255, 255)))
 
# creating a incremental text layout
layout = pyglet.text.layout.IncrementalTextLayout(document, 400, 50, batch = batch)
 
# creating a caret
caret = pyglet.text.caret.Caret(layout, color =(255, 255, 255))
 
# caret to window push handlers
window.push_handlers(caret)
 
# on draw event
@window.event
def on_draw():
     
    # clear the window
    window.clear()
     
    # draw the batch
    batch.draw()
     
    # window push handlers
    window.push_handlers(caret)
 
     
# key press event   
@window.event
def on_key_press(symbol, modifier):
 
    # key "C" get press
    if symbol == pyglet.window.key.C:
         
        # closing the window
        window.close()
     
 
# image for icon
img = image = pyglet.resource.image("logo.png")
 
# setting image as icon
window.set_icon(img)
 
                
# start running the application
pyglet.app.run()

Output :
 

 


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