#
# file: slideshow.py
#
# This program does a small slide show, using
# images and buttons

from graphics import *

def main():
    win = GraphWin("Slide Show",800,600)
    win.setBackground('white')

    nextB = Rectangle(Point(600,550),Point(650,570))
    nextB.setFill("green")
    nextBT = Text(Point(625,560),"NEXT")
    nextB.draw(win)
    nextBT.draw(win)

    flag = 1 # used to signal that the user click on "Exit" button

    exitB = Rectangle(Point(700,550),Point(750,570))
    exitB.setFill("green")
    exitBT = Text(Point(725,560),"EXIT")
    exitB.draw(win)
    exitBT.draw(win)

    img1 = Image(Point(400,300),"tree-of-life.gif")
    img2 = Image(Point(400,300),"Celtic-tree-of-life.gif")
    img3 = Image(Point(400,300),"TreeOfLife.gif")

    img1.draw(win)

    counter = 1
    while(flag != 0):
        c = win.getMouse()
        x = c.getX()
        y = c.getY()
        if 600 <= x <= 650 and 550<= y <=570:
            counter += 1
            if counter % 3 == 1:
                img1.draw(win)
                if counter != 1:
                    img3.undraw()
            elif counter % 3 == 2:
                img1.undraw()
                img2.draw(win)
                
            else:
                img2.undraw()
                img3.draw(win)
                
            
        elif 700 <= x <= 750 and 550<= y <=570:
            flag = 0
        
    win.close()

main()