Modify Exercise 11.5. Allow the user to fill the rectangle with a color. Create a popup menu of possible colors. The popup menu should appear when the user presses the right-mouse button.
What will be an ideal response?
```
# Draw a rectangle on a Canvas using the mouse, allow fill.
from Tkinter import *
class drawFillRectangle( Frame ):
"""Demonstrate drawing on a Canvas with mouse"""
def __init__( self ):
"""Create canvas, create menu and bind events"""
Frame.__init__( self )
self.pack( expand = YES, fill = BOTH )
self.master.title( "Drag to Draw a Rectangle" )
self.master.geometry( "300x200" )
self.display = Canvas( self, bg = "white" )
self.display.pack( expand = YES, fill = BOTH )
colors = [ "White", "Blue", "Yellow", "Red" ]
self.fillColor = StringVar()
self.fillColor.set( colors[ 0 ] )
# create the menu
self.menu = Menu( self, tearoff = 0 )
for item in colors:
self.menu.add_radiobutton( label = item,
variable = self.fillColor,
command = self.setFillColor )
# coordinates and fill color of the rectangle
self.x1, self.x2 = 0, 0
self.x2, self.y2 = 0, 0
# bind events to the canvas
self.display.bind( "
self.display.bind( "
self.display.bind( "
self.display.bind( "
def setStart( self, event ):
"""Set start points for rectangle"""
self.x1 = event.x
self.y1 = event.y
def setEnd( self, event ):
"""Set end points for rectangle and draw"""
self.x2 = event.x
self.y2 = event.y
self.draw()
def draw( self ):
"""Remove rectangle and redraw with specified fill"""
self.display.delete( "rectangle" )
self.display.create_rectangle( self.x1, self.y1, self.x2,
self.y2, tags = "rectangle",
fill = self.fillColor.get() )
def popupMenu( self, event ):
"""Create menu at click position"""
self.menu.post( event.x_root, event.y_root )
def setFillColor( self ):
"""Set rectangle fill color"""
self.display.itemconfig( "rectangle",
fill = self.fillColor.get() )
def main():
drawFillRectangle().mainloop()
if __name__ == "__main__":
main()
```
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