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PYGLET – On Text Motion Event
  • Last Updated : 22 Sep, 2020

In this article we will see how we can trigger on text motion event 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).Typically this is called after on_key_press() and before on_key_release(), but may also be called multiple times if the key is help down (key repeating). We should always use this method for moving the text input cursor (caret), as different platforms have different default keyboard mappings, and key repeats are handled correctly.

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

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

Below is the syntax of the on text motion, this method get called when this event is triggered

@window.event       
def on_text_motion(motion):
    print("Arrow Key pressed")

Below are the list of motion this event covers

MOTION_UP
MOTION_RIGHT
MOTION_DOWN
MOTION_LEFT
MOTION_NEXT_WORD
MOTION_PREVIOUS_WORD
MOTION_BEGINNING_OF_LINE
MOTION_END_OF_LINE
MOTION_NEXT_PAGE
MOTION_PREVIOUS_PAGE
MOTION_BEGINNING_OF_FILE
MOTION_END_OF_FILE
MOTION_BACKSPACE
MOTION_DELETE



Below is the implementation




# 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 = "GeeksforGeeks"
  
# creating a label with font = times roman
# font size = 36
# aligning it to the centre
label = pyglet.text.Label(text,
                          font_name ='Times New Roman',
                          font_size = 36,
                          x = window.width//2, y = window.height//2,
                          anchor_x ='center', anchor_y ='center')
  
new_label = pyglet.text.Label(text,
                          font_name ='Times New Roman',
                          font_size = 10,
                          x = 25, y = 25)
  
# on draw event
@window.event
def on_draw():    
  
      
    # clearing the window
    window.clear()
      
    # drawing the label on the window
    label.draw()
  
      
# key press event    
@window.event
def on_key_press(symbol, modifier):
  
    # key "C" get press
    if symbol == pyglet.window.key.C:
          
        print("Key C is pressed")
  
  
# on text motion event
@window.event
def on_text_motion(motion):
      
    # prinitng message
    print(motion)
      
  
# 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 :

When we press arrow key this message will get printed

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