Multiprocessing version of notification window demo

DemoPrograms/Demo_Notification_Window_Multiprocessing.py

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+import PySimpleGUI as sg
+import textwrap
+from multiprocessing import Process
+
+'''
+    Notification Window Demo Program
+    Shamelessly stolen from PySimpleGUI user ncotrb
+
+    Displays a small informational window with an Icon and a message in the lower right corner of the display
+    Option to fade in/out or immediatealy display.
+    
+    You can click on the notification window to speed things along.  The idea is that if you click while fading in, you should immediately see the info. If
+    you click while info is displaying or while fading out, the window closes immediately.
+    
+    Note - In order to import and use these calls, you must make the call from a "main program".
+
+'''
+
+
+# -------------------------------------------------------------------
+# fade in/out info and default window alpha
+WIN_MARGIN = 60
+
+# colors
+WIN_COLOR = "#282828"
+TEXT_COLOR = "#ffffff"
+
+DEFAULT_DISPLAY_DURATION_IN_MILLISECONDS = 3000
+
+# Base64 Images to use as icons in the window
+image64_error = b'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'
+
+image64_success = b'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'
+
+# -------------------------------------------------------------------
+
+def _display_notification(title, message, icon=image64_success, display_duration_in_ms=DEFAULT_DISPLAY_DURATION_IN_MILLISECONDS, use_fade_in=True, alpha=0.9, location=None):
+    # Compute location and size of the window
+    message = textwrap.fill(message, 50)
+    win_msg_lines = message.count("\n") + 1
+
+    screen_res_x, screen_res_y = sg.Window.get_screen_size()
+    win_margin = WIN_MARGIN  # distance from screen edges
+    win_width, win_height = 364, 66 + (14.8 * win_msg_lines)
+
+    layout = [[sg.Graph(canvas_size=(win_width, win_height), graph_bottom_left=(0, win_height), graph_top_right=(win_width, 0), key="-GRAPH-", background_color=WIN_COLOR, enable_events=True)]]
+
+    win_location = location if location is not None else (screen_res_x - win_width - win_margin, screen_res_y - win_height - win_margin)
+    window = sg.Window(title, layout, background_color=WIN_COLOR, no_titlebar=True,
+                       location=win_location, keep_on_top=True, alpha_channel=0, margins=(0,0), element_padding=(0,0), grab_anywhere=True, finalize=True)
+
+    window["-GRAPH-"].draw_rectangle((win_width, win_height), (-win_width, -win_height), fill_color=WIN_COLOR, line_color=WIN_COLOR)
+    window["-GRAPH-"].draw_image(data=icon, location=(20, 20))
+    window["-GRAPH-"].draw_text(title, location=(64, 20), color=TEXT_COLOR, font=("Arial", 12, "bold"), text_location=sg.TEXT_LOCATION_TOP_LEFT)
+    window["-GRAPH-"].draw_text(message, location=(64, 44), color=TEXT_COLOR, font=("Arial", 9), text_location=sg.TEXT_LOCATION_TOP_LEFT)
+    window["-GRAPH-"].set_cursor('hand2')
+
+    if use_fade_in == True:
+        for i in range(1,int(alpha*100)):               # fade in
+            window.set_alpha(i/100)
+            event, values = window.read(timeout=20)
+            if event != sg.TIMEOUT_KEY:
+                window.set_alpha(1)
+                break
+        event, values = window(timeout=display_duration_in_ms)
+        if event == sg.TIMEOUT_KEY:
+            for i in range(int(alpha*100),1,-1):       # fade out
+                window.set_alpha(i/100)
+                event, values = window.read(timeout=20)
+                if event != sg.TIMEOUT_KEY:
+                    break
+    else:
+        window.set_alpha(alpha)
+        event, values = window(timeout=display_duration_in_ms)
+
+    window.close()
+
+
+def display_notification(title, message, icon=image64_success, display_duration_in_ms=DEFAULT_DISPLAY_DURATION_IN_MILLISECONDS, use_fade_in=True, alpha=0.9, location=None):
+    proc = Process(target=_display_notification, args=(title, message, icon,display_duration_in_ms, use_fade_in, alpha, location))
+    proc.start()
+    return proc
+
+if __name__ == '__main__':
+    proc2 = display_notification('Normal Location', 'This is my notification!')
+    proc3 = display_notification('Upper Left', 'This one does not fade in!', icon=image64_error, location=(0,0), use_fade_in=False)
+
+    proc3.join()
+    proc2.join()
+    print('*** Successfully joined process ***')