Comp 151 Project 3

Simple GUI based adding machine

Summary:

In this third project you will build me a simple adding machine using the Zelle graphics library

Due:

Sunday Oct 7th at 11:59pm. (you have about a week and a half.)

Description:

First create a new project (which creates a new project folder)

Then get the Zelle graphics library and put it in your project folder

Then create a window that looks basically like the one below:

what the window looks like when program is first run

After your program gets this window up, you need to loop forever (while True:)

wait for the user to click the mouse,

If the user clicked the mouse inside of the "add button" (the Rectangle that has the Text "ADD" on it, then get the numbers from the two Entry objects and add them and then report the result as you can see in the image below:
if the user clicked the mouse inside of the "clear button" (the Rectangle that has the Text "CLEAR" on it) then set the text of both Entry objects to "" and do the same thing to wherever you are reporting results. So the window below, would return to looking like the window in the picture above after pressing clear.
Finally, if the user clicked the mouse inside the "quit button" (the Rectangle that has the "QUIT" text on it.) then return from your main function (use the return or break keywords.

the project after pressing the add button

To make your life a little easier, you can use the function below to help you determine if one of the fake buttons is pushed (and do nothing if the mouse is clicked outside of those fake buttons).

def is_clicked(rect:graphics.Rectangle, point:graphics.Point):
    xloc = point.getX()
    yloc = point.getY()
    button_width = abs(rect.getP1().getX() - rect.getP2().getX())
    button_height = abs(rect.getP1().getY() - rect.getP2().getY())
    center = rect.getCenter()
    if xloc >= center.getX()- button_width/2 and xloc <= center.getX() + button_width/2 and \
        yloc >= center.getY() - button_height/2 and yloc <= center.getY() + button_height/2:
        return True
    else:
        return False

Just paste the function in your code above your def main(): line.

For the example below, assume that click_loc is initialized as follows:

click_loc = window.getMouse()

and clear_rect is the graphics.Rectangle object that I used to draw it up above. Then can use this in_clicked something like the following:

if is_clicked(clear_rect, click_loc):

Additional requirements:

Your code must be commented

To help me identify your work, make the name of your program file

yourFirstInitialLastNameLab2.py

(so mine would be JSantoreLab2.py)
And put the following at the beginning of the program as a comment:

Your name
anything that was left undone
anything that I need to know to run the program correctly.

Project Submission

Submit your project via blackboard.