PYGLET - 在增量文本布局中获取在线位置

在本文中，我们将看到如何在Python的 PYGLET 模块中获取增量文本布局对象中的在线位置。 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）。增量文本布局显示适合交互式编辑和/或滚动大型文档的文本。与 TextLayout 和 ScrollableTextLayout 不同，此类仅针对可见的文本行生成顶点列表。随着文档的滚动，顶点列表会被删除并酌情创建，以将视频内存使用量降至最低并提高渲染速度。 Position 是给定行索引和 X 坐标的最近文档位置。

我们可以在下面给出的命令的帮助下创建一个窗口和增量文本布局

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

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

In order to create window we use get_position_on_line method

Syntax : layout.get_position_on_line(line, x)

Argument : It takes two integer as argument

Return : It returns integer

下面是实现

# 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 Learn and Grow, Portal for Geeks"
   
# batch object
batch = pyglet.graphics.Batch()
   
# creating a formatted document
# unlike unformatted document it is formatted
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, multiline = True, 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 = pyglet.resource.image("gfg.png")
  
# setting image as icon
window.set_icon(img)
  
# getting position on line
# line 0 and x = 100
value = layout.get_position_on_line(0, 100)
  
# printing value
print("Position on Line : ", end ="")
print(value)
   
# start running the application
pyglet.app.run()

输出 ：

Position on Line : 9