1 同步改變字體大小

代碼：

import PySimpleGUI as sg
font_size = 12
layout = [[sg.Spin([sz for sz in range(6, 172)], font=('Helvetica 20'), 
                   initial_value=font_size, change_submits=True, key='spin'),
           sg.Slider(range=(6,172), orientation='h', size=(10,20),
                     change_submits=True, key='slider', font=('Helvetica 20')),
           sg.Text("Aa", size=(2, 1), font="Helvetica "  + str(font_size), key='text')]]

window = sg.Window("Font size selector", layout, return_keyboard_events=True, grab_anywhere=False)
# Event Loop
sz = font_size
while True:
    event, values= window.read()
    if event is None:
        break
    sz_spin = int(values['spin'])
    sz_slider = int(values['slider'])
    sz = sz_spin if sz_spin != font_size else sz_slider
    if sz != font_size:
        font_size = sz
        font = "Helvetica "  + str(font_size)
        window['text'].update(font=font)
        window['slider'].update(sz)
        window['spin'].update(sz)

print("Done.")
window.close()

效果見圖1：

圖1 改變字體大小

改變圖1 中的滑塊或者 spin 均可改變字體大小。

2 捕獲鍵盤和鼠標(biāo)輸入

代碼：

import PySimpleGUI as sg

# Recipe for getting keys, one at a time as they are released
# If want to use the space bar, then be sure and disable the "default focus"

text_elem = sg.Text(size=(18, 1))

layout = [[sg.Text("Press a key or scroll mouse")],
          [text_elem],
          [sg.Button("Exit")]]

window = sg.Window("Keyboard Test", layout,  return_keyboard_events=True, use_default_focus=False)

# ---===--- Loop taking in user input --- #
while True:
    event, value = window.read()

    if event in ("Exit", None):
        print(event, "exiting")
        break
    else:
        text_elem.update(event)
window.close()

效果見圖2：

圖2 捕獲鍵盤和鼠標(biāo)輸入

在 sg.Window 中傳入?yún)?shù) return_keyboard_events=True 即可捕獲鍵盤輸入。

3 創(chuàng)建多個(gè) Windows

3.1 兩個(gè)窗口同時(shí)存在

代碼：

import PySimpleGUI as sg

# Design pattern 2 - First window remains active

layout = [[ sg.Text('Window 1'),],
          [sg.Input(do_not_clear=True)],
          [sg.Text(size=(15,1), key='_OUTPUT_')],
          [sg.Button('Launch 2'), sg.Button('Exit')]]

win1 = sg.Window('Window 1', layout)

win2_active = False
while True:
    ev1, vals1 = win1.read(timeout=100)
    win1['_OUTPUT_'].update(vals1[0])
    if ev1 is None or ev1 == 'Exit':
        break
    if not win2_active and ev1 == 'Launch 2':
        win2_active = True
        layout2 = [[sg.Text('Window 2')],
                   [sg.Button('Exit')]]
        win2 = sg.Window('Window 2', layout2)
    if win2_active:
        ev2, vals2 = win2.read(timeout=100)
        if ev2 is None or ev2 == 'Exit':
            win2_active  = False
            win2.close()
win1.close()

效果圖見圖3：

圖3 同時(shí)存在的兩個(gè)窗口

3.2 隱藏兩個(gè)窗口中的一個(gè)

代碼：

import PySimpleGUI as sg

# Design pattern 1 - First window does not remain active
sg.change_look_and_feel('LightGreen')
layout = [[ sg.Text('Window 1'),],
          [sg.Input(do_not_clear=True)],
          [sg.Text(size=(15,1),  key='_OUTPUT_')],
          [sg.Button('Launch 2')]]
win1 = sg.Window('Window 1', layout)
win2_active=False
while True:
    ev1, vals1 = win1.read(timeout=100)
    if ev1 is None:
        break
    win1['_OUTPUT_'].update(vals1[0])

    if ev1 == 'Launch 2'  and not win2_active:
        win2_active = True
        win1.hide()
        layout2 = [[sg.Text('Window 2')],       # note must create a layout from scratch every time. No reuse
                   [sg.Button('Exit')]]

        win2 = sg.Window('Window 2', layout2)
        while True:
            ev2, vals2 = win2.read()
            if ev2 is None or ev2 == 'Exit':
                win2.close()
                win2_active = False
                win1.un_hide()
                break
win1.close()

4 主題預(yù)覽

代碼1：

import PySimpleGUI as sg

window = sg.Window('Testing the Debugger', [[sg.Text('Debugger Tester'), sg.In('Input here'), sg.B('Push Me')]])

while True:
    event, values = window.Read(timeout=500)
    if event == sg.TIMEOUT_KEY:
        continue
    if event is None:
        break
    print(event, values)
window.Close()

效果圖見圖4：

圖4 主題預(yù)覽

4.2 自選預(yù)覽主題

代碼2：

import PySimpleGUI as sg

"""
    Allows you to "browse" through the look and feel settings.  Click on one and you'll see a
    Popup window using the color scheme you chose.  It's a simple little program that also demonstrates
    how snappy a GUI can feel if you enable an element's events rather than waiting on a button click.
    In this program, as soon as a listbox entry is clicked, the read returns.
"""

sg.change_look_and_feel('Dark Brown')

layout = [[sg.Text('Look and Feel Browser')],
          [sg.Text('Click a look and feel color to see demo window')],
          [sg.Listbox(values=sg.list_of_look_and_feel_values(),
                      size=(20, 12), key='-LIST-', enable_events=True)],
          [sg.Button('Exit')]]

window = sg.Window('Look and Feel Browser', layout)

while True:  # Event Loop
    event, values = window.read()
    if event in (None, 'Exit'):
        break
    sg.change_look_and_feel(values['-LIST-'][0])
    sg.popup_get_text('This is {}'.format(values['-LIST-'][0]))

window.close()

效果圖見圖5：

圖5 自選預(yù)覽主題

5 sg.Graph 畫出條形圖

代碼:

import PySimpleGUI as sg
import random
sg.change_look_and_feel('Dark Blue 3')
BAR_WIDTH = 50
BAR_SPACING = 75
EDGE_OFFSET = 3
canvas_size = (500, 500)  # canvas 區(qū)域的 (寬, 高)
graph_bottom_left = (0, 0)  # 左下角坐標(biāo)
graph_top_right = (500, 500)  # 右上角坐標(biāo)

graph = sg.Graph(canvas_size, graph_bottom_left, graph_top_right)

layout = [[sg.Text('條形圖')],
          [graph],
          [sg.Button('OK')]]

window = sg.Window('Window Title', layout)

while True:
    event, values = window.read()
    graph.Erase()
    if event is None:
        break

    for i in range(7):
        graph_value = random.randint(0, 400)
        graph.DrawRectangle(top_left=(i * BAR_SPACING + EDGE_OFFSET, graph_value),
                            bottom_right=(i * BAR_SPACING + EDGE_OFFSET + BAR_WIDTH, 0), fill_color='blue')
        graph.DrawText(text=graph_value, location=(
            i*BAR_SPACING+EDGE_OFFSET+25, graph_value+10))
window.close()

效果見圖6：

圖6 條形圖