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# 9.21 (Geometry: inside a rectangle?) Write a program that draws a fixed rectangle centered
# at (100, 60) with width 100 and height 40. Whenever the mouse is moved,
# display the message indicating whether the mouse pointer is inside the rectangle,
# as shown in Figure 9.32. To detect whether the pointer is inside a rectangle, use the
# Rectangle2D class defined in Exercise 8.19.
# 9.20 (Geometry: inside a circle?) Write a program that draws a fixed circle centered at
# (100, 60) with radius 50. Whenever the mouse is moved while the left button is
# pressed, display the message indicating whether the mouse pointer is inside the
# circle, as shown in Figure 9.31.
from tkinter import * # Import tkinter
width = 300
height = 300
class MainGUI:
def __init__(self):
window = Tk() # Create a window
self.canvas = Canvas(window, bg="white", width=width, height=height)
self.canvas.pack()
self.canvas.create_rectangle(100, 100, 250, 150, tags="rec")
self.canvas.bind("", self.isInside)
window.mainloop() # Create an event loop
def isInside(self, event):
self.canvas.delete("text")
if isInsideRec(event.x, event.y):
self.canvas.create_text(event.x, event.y - 5,
text="Mouse pointer is in the rectangle", tags="text")
else:
self.canvas.create_text(event.x, event.y - 5,
text="Mouse pointer is not in the rectangle", tags="text")
def isInsideRec(x, y):
if x > 250 or x<100 or y < 100 or y >150:
return False
else:
return True
MainGUI()
