如何使按鈕顯示在背景后面，或使按鈕背景透明？

Question

（注意：帶邊框的按鈕是背景的一部分） 我想將真實的按鈕放置在圖像后面，以便就像我在背景中按下按鈕一樣，但是，實際上我在按下它后面的按鈕。

def __init__(self, parent, controller):
    tk.Frame.__init__(self, parent)
    self.controller = controller

    background_image = tk.PhotoImage(file="Mainmenu.png")  # Displays whats in the file
    background_label = tk.Label(self, image=background_image)  # Makes tk.Label display the background_image
    background_label.place(x=0, y=0, relwidth=1, relheight=1)  # Adjusts the height/width

    background_label.image = background_image  # Recognises the label as an image

    button1 = tk.Button(self, text="Play", bg="red", fg="black", height=2, width=15,
                        command=lambda: controller.show_frame("Play"))
    button2 = tk.Button(self, text="Settings", bg="yellow", fg="black", height=2, width=15,
                        command=lambda: controller.show_frame("Settings"))
    button3 = tk.Button(self, text="Quit", bg="white", fg="black", height=2, width=15, cursor="pirate",
                        command=exit)

    button1.place(x="300",y="240")
    button2.place(x="480",y="240")
    button3.place(x="390",y="300")
    button1.config(font=("System", 10))
    button2.config(font=("System", 10))
    button3.config(font=("System", 10))

Answer 1

問題 ：讓用戶直接在背景上單擊

1. 定義從tk.Canvas繼承的類對象

    class Menu(tk.Canvas): def __init__(self, parent, image, command, show_areas=False): """ Init a Canvas object, displaying a image Bind the Mouse click to a function Init a dict to hold the added clickable areas :param parent: The parent widget :param image: The image object :param command: The callback command to handle area clicks :param show_areas: For debug/trace purpose. If 'True'show the clickable areas. """ super().__init__(parent) # Feed TKinter the image self._image = image self.create_image(0, 0, image=self._image, anchor='nw') self.callback = command self.bind('<Button-1>', self.Button_1_func) self.show_areas = show_areas self.areas = {} 

2. 鼠標單擊處理程序功能。
   搜索匹配的區域並使用tag調用.callback函數

     def Button_1_func(self, event): for tag, (x, y, x2, y2) in self.areas.items(): if event.x in range(x, x2) and event.y in range(y, y2): event.tag = tag self.callback(event) return 'break' 

3. 添加具有給定tag和計算幾何的新可點擊區域。
   15 * 10計算區域width
5 * 10計算區域height
   如果self.show_areas為True ，則用幾何圖形創建一個矩形。

     def add_area(self, tag, coord): self.areas[tag] = *coord, (coord[0] + (15 * 10)) + 1, (coord[1] + (5 * 10)) + 1 if self.show_areas: self.create_rectangle(self.areas[tag]) 

用法 ：

class App(tk.Tk):
    def __init__(self):
        super().__init__()

        # Displays as background_image what's in the file
        self.menu = Menu(self,
                         image=tk.PhotoImage(file="Mainmenu.png"),
                         command=self.command,
                         show_areas=True)
        self.menu.place(x=0, y=0, relwidth=1, relheight=1)

        for tag, coords in [('Play', (300, 240)), 
                            ('Settings', (480, 240)), 
                            ('Quit', (390, 300))]:
            self.menu.add_area(tag, coords)

    def show_frame(self, key):
        # Simulating controller.show_frame
        print('show_frame({})'.format(key))

    def command(self, event):
        if event.tag in ['Play', 'Settings']:
            self.show_frame(event.tag)

        if event.tag == 'Quit':
            self.quit()

if __name__ == "__main__":
    App().mainloop()

使用Python測試：3.5