PYGLET – 访问格式化文档的事件类型

在本文中，我们将了解如何在Python的 PYGLET 模块中访问格式化文档的事件类型。 Pyglet 是易于使用但功能强大的库，用于开发视觉丰富的 GUI 应用程序，如游戏、多媒体等。窗口是占用操作系统资源的“重量级”对象。 Windows 可能显示为浮动区域，也可以设置为填充整个屏幕（全屏）。格式化文档的布局通常通过添加结构（例如标题、缩进、字体变体和其他转换纯（未格式化）文本以使其具有与已发布作品相似的外观）的结构来增强其人类可读性。基本上有三个与格式化文档相关的事件。

我们可以在下面给出的命令的帮助下创建一个窗口和格式化文档

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

# creating document
document = pyglet.text.document.FormattedDocument(text)

In order to create window we use event_types attribute with the document object
Syntax : document.event_types
Argument : It takes no argument
Return : It returns list 
 

下面是实现

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 Have a nice day"
 
# batch object
batch = pyglet.graphics.Batch()
 
# creating a formatted 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 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)
 
     
# 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)
 
# accesing event types of the document
value = document.event_types
 
# printing the value
print(value)
 
# start running the application
pyglet.app.run()

输出 ：

['on_insert_text', 'on_delete_text', 'on_style_text']