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PYGLET – Accessing Caret Mark Property
  • Last Updated : 23 Sep, 2020

In this article we will see how we can access mark property to the caret 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. Mark is position of immovable end of text selection within document. An interactive text selection is determined by its immovable end (the caret’s position when a mouse drag begins) and the caret’s position, which moves interactively by mouse and keyboard input.

We can create a window and caret with the help of commands given below

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

# creating a caret
caret = pyglet.text.caret.Caret(layout, color=(255, 255, 255))

In order to create window we use mark attribute with the caret object

Syntax : caret.mark

Argument : It takes no argument



Return : It returns integer

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 = "Welcome to GeeksforGeeks 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)
  
# creating a caret
caret = pyglet.text.caret.Caret(layout, color =(150, 255, 150))
  
  
  
# caret to winow 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 winow 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()
        pass
      
  
# image for icon
img = image = pyglet.resource.image("logo.png")
  
# setting image as icon
window.set_icon(img)
  
  
# getting caret mark
value = caret.mark
  
# priting the value
print("Mark : ", end ="")
print(value)
  
# caret.line = 10
  
# start running the application
pyglet.app.run()

Output :

Mark : None

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