Python Tkinter: Canvas scrolling with MouseWheel

Question

I have created a tree inside a Canvas, and I have also allowed MouseWheel to scroll up and down.

However, how do I prevent scrolling if tree content has not exceed c

Answer 1

You can use the bbox method of canvas to retrieve the actual height of drawn items on canvas. bbox return a tuple defining a rectangle. You can compare it with the height of your canvas widget.

  height = self.canvas.winfo_height()
  _,_,_,items_height = self.canvas.bbox(Tkinter.ALL)
  if (items_height < height):
     direction = 0