79 lines
3.3 KiB
Python
79 lines
3.3 KiB
Python
import PySimpleGUI as sg
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"""
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Demo Program - Simulated Buttons with Mouseover Highlights
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The purpose of this demo is to teach you 5 unique PySimpleGUI constructs that when combined
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create a "Button" that highlights on mouseover regarless of the Operating System.
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Because of how tktiner works, mouseover highlighting is inconsistent across operating systems for Buttons.
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This is one (dare I say "clever") way to get this effect in your program
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1. Binding the Enter and Leave tkinter events
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2. Using Tuples as keys
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3. Using List Comprehensions to build a layout
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4. Using Text Elements to Simulate Buttons
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5. Using a "User Defined Element" to make what appears to be a new type of Button in the layout
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The KEY to making this work simply is these "Buttons" have a tuple as a key.
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The format of the key is ('-B-', button_text)
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An element's bind method will make a tuple if the original key is a tuple.
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(('-B-', button_text), 'ENTER') will be the event when the mouse is moved over the "Button"
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Copyright 2022 PySimpleGUI.org
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"""
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# sg.theme('dark red')
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def TextButton(text):
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"""
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A User Defined Element. It looks like a Button, but is a Text element
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:param text: The text that will be put on the "Button"
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:return: A Text element with a tuple as the key
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"""
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return sg.Text(text, key=('-B-', text), relief='raised', enable_events=True, font='_ 15',text_color=sg.theme_button_color_text(), background_color=sg.theme_button_color_background())
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def do_binds(window, button_text):
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"""
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This is magic code that enables the mouseover highlighting to work.
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"""
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for btext in button_text:
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window[('-B-', btext)].bind('<Enter>', 'ENTER')
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window[('-B-', btext)].bind('<Leave>', 'EXIT')
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def main():
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# Defines the text on the 3 buttons we're making
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button_text = ('Button 1', 'Button 2', 'Button 3')
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# The window's layout
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layout = [[TextButton(text) for text in button_text],
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[sg.Text(font='_ 14', k='-STATUS-')],
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[sg.Ok(), sg.Exit()]]
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window = sg.Window('Custom Mouseover Highlighting Buttons', layout, finalize=True)
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# After the window is finalized, then can perform the bindings
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do_binds(window, button_text)
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# The Event Looop
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while True:
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event, values = window.read()
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print(event, values)
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if event == sg.WIN_CLOSED or event == 'Exit':
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break
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# if the event is a tuple, it's one of our TextButtons
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if isinstance(event, tuple):
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# if second item is one of the bound strings, then do the mouseeover code
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if event[1] in ('ENTER', 'EXIT'):
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button_key = event[0]
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if event[1] == 'ENTER':
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window[button_key].update(text_color=sg.theme_button_color_background(), background_color=sg.theme_button_color_text())
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if event[1] == 'EXIT':
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window[button_key].update(text_color=sg.theme_button_color_text(), background_color=sg.theme_button_color_background())
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else: # a "normal" button click (Text clicked) so print the text which we put into the tuple
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window['-STATUS-'].update(f'Button pressed = {event[1]}')
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window.close()
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if __name__ == '__main__':
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main() |