PYGLET – Accessing Selection Start Property of Incremental Text Layout

In this article we will see how we can access the selection start of incremental text layout 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). Incremental text layout displays text which is suitable for interactive editing and/or scrolling large documents. Unlike TextLayout and ScrollableTextLayout, this class generates vertex lists only for lines of text that are visible. As the document is scrolled, vertex lists are deleted and created as appropriate to keep video memory usage to a minimum and improve rendering speed. Selection start is start position of the active selection (exclusive).

We can create a window and incremental text layout with the help of commands given below 

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

# creating a incremental layout
layout = pyglet.text.layout.IncrementalTextLayout(document, width, height)
 

In order to create window we use selection_start attribute with the layout object
Syntax : layout.selection_start
Argument : It takes no argument
Return : It returns integer 
 

Below is the implementation  

Output : 
 

Start position : 10