Small projectIntermediate30 XPExercise 4/8

Screensaver

Task

Make a screensaver: the window has a text field (Entry) and a button (Button). The user types a text into the field and after pressing the button the text starts appearing again and again on the canvas - each time at a random place and in a random colour, at regular intervals (for example every second).

The program runs in a tkinter simulation right in your browser - after Run you see the window and can click it. The tests click and check what was drawn on the canvas.

Examples

Call

from tkinter import _mente as okno

okno.check("okno ma textove pole a tlacidlo", len(okno.entries()) >= 1 and len(okno.buttons()) >= 1)
okno.type("Mente")
okno.press()
okno.wait(20000)
texty = [t for t in okno.created("text") if t.text.strip() == "Mente"]
okno.check("text sa objavuje opakovane", len(texty) >= 3, f"text sa objavil {len(texty)}-krat")
okno.check("na roznych miestach", len({(round(t.coords[0]), round(t.coords[1])) for t in texty}) >= 3)
okno.check("v roznych farbach", len({t.fill for t in texty}) >= 2)
okno.check("postupne v case", len({t.created for t in texty}) >= 3)

Expected output

okno ma textove pole a tlacidlo: OK
text sa objavuje opakovane: OK
na roznych miestach: OK
v roznych farbach: OK
postupne v case: OK

After you submit, 1 hidden test will also check your solution: a different text.

Python starts the first time you run code.

import tkinter
import random
canvas = tkinter.Canvas(width=800, height=400, bg="black")
canvas.pack()
entry = tkinter.Entry()
entry.pack()
def spusti():
    # zobrazuj text z entry.get() v náhodných farbách na náhodných miestach
    pass
button = tkinter.Button(text="Šetrič obrazovky", command=spusti)
button.pack()
tkinter.mainloop()

Ctrl+Enter runs the program. Tab indents. Press Esc, then Tab, to leave the editor.

Input (stdin)

Each line = one call to input().

Output

Hints

Try it yourself first. Each hint reveals a little more - and lowers the reward a little.

Signed out, hints are free - but no XP is awarded either.

Solution

The solution unlocks after the last hint.