New Demo that shows bouncing balls on your desktop. Uses the latest GitHub release of PySimpleGUI

DemoPrograms/Demo_Graph_pymunk_Desktop_Balls.py

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+import PySimpleGUI as sg
+import pymunk
+import random
+
+"""
+    Demo of pymunk physics lib combined with a large Window that is transparent. Result appears like
+    a screensaver type of screen
+"""
+
+class Ball():
+    def __init__(self, x, y, r, *args, **kwargs):
+        mass = 10
+        # Create a Body with mass and moment
+        self.body = pymunk.Body(mass, pymunk.moment_for_circle(mass, 0, r, (0, 0)))
+        self.body.position = x, y
+        # Create a box shape and attach to body
+        self.shape = pymunk.Circle(self.body, r, offset=(0, 0))
+        self.shape.elasticity = 0.99999
+        self.shape.friction = 0.8
+        self.gui_circle_figure = None
+
+
+class Playfield():
+    def __init__(self, graph_elem, screensize):
+        self.graph_elem = graph_elem            # type: sg.Graph
+        self.space = pymunk.Space()
+        self.space.gravity = 0, 200
+        self.screensize = screensize
+        self.add_wall((0, screensize[1]), (screensize[0],screensize[1]))  # ground
+        self.add_wall((0, 0), (0, screensize[1]))  # Left side
+        self.add_wall((screensize[0], 0), (screensize[0], screensize[1]))  # right side
+        self.arena_balls = []       # type: List[Ball]
+
+    def add_wall(self, pt_from, pt_to):
+        body = pymunk.Body(body_type=pymunk.Body.STATIC)
+        ground_shape = pymunk.Segment(body, pt_from, pt_to, 1.0)
+        ground_shape.friction = 0.8
+        ground_shape.elasticity = .99
+        self.space.add(ground_shape)
+
+    def add_balls(self, num_balls = 30):
+        for i in range(1, num_balls):
+            x = random.randint(0, self.screensize[0])
+            y = random.randint(0, self.screensize[1])
+            r = random.randint(5, 10)
+            ball = Ball(x, y, r)
+            self.arena_balls.append(ball)
+            self.space.add(ball.body, ball.shape)
+            ball.gui_circle_figure = self.graph_elem.draw_circle(
+                (x, y), r, fill_color=random.choice(('#23a0a0', '#56d856', '#be45be', '#5681d8', '#d34545', '#BE7C29')), line_width=0)
+
+
+def main():
+    screensize = sg.Window.get_screen_size()
+
+    # -------------------  Build and show the GUI Windows -------------------
+    graph_elem = sg.Graph(screensize, (0, screensize[1]), (screensize[0], 0),
+                          enable_events=True, key='-GRAPH-', background_color='lightblue')
+    layout = [[graph_elem]]
+    window1 = sg.Window('Bouncing Balls', layout, finalize=True, location=(0,0), keep_on_top=True,  element_padding=(0,0), margins=(0,0), no_titlebar=True, transparent_color='lightblue')
+
+    area = Playfield(graph_elem, screensize)
+    area.add_balls()
+
+    layout2 = [[sg.B('❎', border_width=0, button_color=('white', sg.theme_background_color()), key='Exit')],[sg.B('Kick'), sg.B('Front'), sg.B('Back'), sg.B('More Balls'),]]
+    window2 = sg.Window('Buttons', layout2, keep_on_top=True, grab_anywhere=True, no_titlebar=True, finalize=True)
+
+    # ------------------- GUI Event Loop -------------------
+    while True:
+        window, event, values = sg.read_all_windows(timeout=0)
+        if event in (sg.WIN_CLOSED, 'Exit'):
+            break
+        area.space.step(0.02)
+
+        if event == 'More Balls':
+            area.add_balls()
+        elif event == 'Kick':
+            for ball in area.arena_balls:
+                ball.body.position = ball.body.position[0], ball.body.position[1]-random.randint(1, 200)
+        elif event == 'Front':
+            window1.bring_to_front()
+        elif event == 'Back':
+            window1.send_to_back()
+
+        for ball in area.arena_balls:
+            if ball.body.position[1] > screensize[1]:
+                ball.body.position = ball.body.position[0],screensize[1]-30
+
+            graph_elem.RelocateFigure(
+                ball.gui_circle_figure, ball.body.position[0], ball.body.position[1])
+
+    window1.close()
+    window2.close()
+
+if __name__ == '__main__':
+    main()