In this article we will see how we can trigger the on style text 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). Formatted documents are generally laid out to enhance their human readability by adding structure, such as headings, indentation, font variations, and other devices that transform plain (unformatted) text so that they have an appearance similar to published works. This event get triggered when user text style is changed. The event handler is bound by the text layout; there is no need for applications to interact with this method.
We can create a window and formatted document with the help of commands given below
# creating a window window = pyglet.window.Window(width, height, title) # creating document document = pyglet.text.document.FormattedDocument(text)
Below is the syntax of the on style text event
# on style text event
@window.event
def on_style_text(start, end):
#printing text
print(“Text style changed”)
Below is the implementation
Python3
# importing pyglet moduleimport pygletimport pyglet.window.key# width of windowwidth = 500# height of windowheight = 500# caption i.e title of the windowtitle = "Geeksforneveropen"# creating a windowwindow = pyglet.window.Window(width, height, title)# text text = "Welcome to neveropen Have a nice day"# batch objectbatch = pyglet.graphics.Batch()# creating a formatted documentdocument = pyglet.text.document.FormattedDocument(text)# setting style to the documentdocument.set_style(0, len(document.text), dict(font_name ='Arial', font_size = 16, color =(255, 255, 255, 255)))# creating a incremental text layoutlayout = pyglet.text.layout.IncrementalTextLayout(document, 400, 350, batch = batch)# creating a caretcaret = pyglet.text.caret.Caret(layout, color =(150, 255, 150))# caret to window push handlerswindow.push_handlers(caret)# setting caret stylecaret.set_style(dict(font_name ="Arial"))# on draw event@window.eventdef 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.eventdef on_key_press(symbol, modifier): # key "C" get press if symbol == pyglet.window.key.C: # closing the window # window.close() pass # on style text event@window.event def on_style_text(start, end): # printing text print("Text style changed")# image for iconimg = image = pyglet.resource.image("logo.png")# setting image as iconwindow.set_icon(img)# start running the applicationpyglet.app.run() |
Output :
