PYGLET – Key State Handler

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In this article, we will see how we can create a key state handler object 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). Key state handler class is a simple handler that tracks the state of keys on the keyboard. If a key is pressed then this handler holds a True value for it.

We can create a window with the help of command given below

# creating a window
window = pyglet.window.Window(width, height, title)

In order to create window we use pyglet.window.key.KeyStateHandler method
Syntax : pyglet.window.key.KeyStateHandler()
Argument : It takes no argument
Return : It returns KeyStateHandler 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 = "Geeksforzambiatek"
   
# creating a window 
window = pyglet.window.Window(width, height, title) 
   
# text  
text = "Welcome tozambiatek Have a nice day"
   
# 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, 350, batch = batch) 
 
# making layout to display multiline
layout.multiline = True
   
# creating a caret 
caret = pyglet.text.caret.Caret(layout, color =(255, 255, 255)) 
   
# caret to window push handlers 
window.push_handlers(caret) 
   
# setting caret style 
caret.set_style(dict(font_name ="Arial")) 
   
   
# on draw event 
@window.event 
def on_draw(): 
       
    # clear the window 
    window.clear() 
       
    # draw the batch 
    batch.draw() 
       
    # caret to window push handlers 
    window.push_handlers(caret) 
     
     
 
# creating a key state handler
key_handler = pyglet.window.key.KeyStateHandler()
       
# key press event     
@window.event 
def on_key_press(symbol, modifier): 
   
    # key "C" get press 
    if symbol == pyglet.window.key.C: 
         
        # printing the message
        print("Key : C is pressed")
         
# image for icon 
img = image = pyglet.resource.image("gfg.png") 
   
# setting image as icon 
window.set_icon(img) 
    
# start running the application 
pyglet.app.run() 