In this article we will see how we can trigger on context lost 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). When the context is lost no more GL methods can be called until it is recreated. This is a rare event, triggered perhaps by the user switching to an incompatible video mode. When it occurs, an application will need to reload all objects (display lists, texture objects, shaders) as well as restore the GL state.
We can create a window with the help of command given below
pyglet.window.Window(width, height, title)
Below is the syntax of the window on context lost event, this method get called when this event is triggered
@window.event
def on_context_lost():
print("Please wait, reloading")
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 = "neveropen"# creating a label with font = times roman# font size = 36# aligning it to the centerlabel = pyglet.text.Label(text, font_name ='Times New Roman', font_size = 36, x = window.width//2, y = window.height//2, anchor_x ='center', anchor_y ='center')# on draw event@window.eventdef on_draw(): # clearing the window window.clear() # drawing the label on the window label.draw() # key press event @window.eventdef on_key_press(symbol, modifier): print("nn") # key "C" get press if symbol == pyglet.window.key.C: # close the window window.close() @window.event # window close event def on_context_lost(): # printing message print("Please wait, reloading") # image for iconimg = image = pyglet.resource.image("logo.png")# setting image as iconwindow.set_icon(img) # start running the applicationpyglet.app.run() |
Output :
