'''
    clickablewindow.py
    Jeff Ondich, updated 3 November 2018

    The ClickableWindow class demonstrates how to handle mouse events
    in the context of John Zelle's graphics library.

    This sample class uses the Tkinter "bind_all" mechanism to trap
    left-mouse-button events and respond to them appropriately.

    The discussion of Events and Bindings in the Tkinter library at
    http://effbot.org/tkinterbook/tkinter-events-and-bindings.htm
    describes more things you can do with a mouse.
'''

from graphics import *

class ClickableWindow(GraphWin):
    def __init__(self, title, width, height):
        GraphWin.__init__(self, title, width, height)
        self.setBackground(color_rgb(255, 255, 255))
        self.text_x = width // 2
        self.text_y = height // 10
        self.text_object = Text(Point(self.text_x, self.text_y), 'Click Somewhere')
        self.text_object.setSize(24)
        self.bind_all('<Button-1>', self.mouse_handler)
        self.text_object.draw(self)

    def mouse_handler(self, event):
        dx = event.x - self.text_x
        dy = event.y - self.text_y
        self.text_object.setText('Ouch')
        self.text_object.move(dx, dy)
        self.text_x += dx
        self.text_y += dy

if __name__ == '__main__':
    window = ClickableWindow('Mouse Test', 1000, 600)
    while window.winfo_exists():
        window.update()