In this article we will see how we can trigger on mouse scroll 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).This event get called when the mouse wheel was scrolled. Note that most mice have only a vertical scroll wheel, so scroll_x is usually 0. An exception to this is the Apple Mighty Mouse, which has a mouse ball in place of the wheel which allows both scroll_x and scroll_y movement.
We can create a window with the help of command given below :
pyglet.window.Window(width, height, title)
Below is the syntax of the on mouse scroll event, this method get called when this event is triggered :
@window.event
def on_mouse_scroll(x, y, scroll_x, scroll_y):
print("Mouse scrolled")
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 = "GeeksforLazyroar"# creating a windowwindow = pyglet.window.Window(width, height, title)# text text = "Lazyroar"# creating a label with font = times roman# font size = 36# aligning it to the centrelabel = 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')new_label = pyglet.text.Label(text, font_name ='Times New Roman', font_size = 10, x = 25, y = 25)# 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): # key "C" get press if symbol == pyglet.window.key.C: print("Key C is pressed")# on mouse scroll event@window.eventdef on_mouse_scroll(x, y, scroll_x, scroll_y): # printing some message print("Mouse scrolled") # image for iconimg = image = pyglet.resource.image("logo.png")# setting image as iconwindow.set_icon(img) # start running the applicationpyglet.app.run() |
Output :
Mouse scrolled Mouse scrolled Mouse scrolled Mouse scrolled Mouse scrolled Mouse scrolled Mouse scrolled Mouse scrolled Mouse scrolled
