如何放置按钮图片 borderless/tansparent

Question

我正在尝试让我的按钮无边框，这样我们就可以在背景上看到进度条我尝试了所有论坛，但无法将按钮的边框放在圆形或制作类似第二张图片的东西这是按钮代码的一部分：

bg3 = Image.open("blanc.png")
resized_bg03 = bg3.resize((20, 20),Image.ANTIALIAS)
new_bg03 = ImageTk.PhotoImage(resized_bg03)   
s = Button(Fenetre,image=new_bg03,borderwidth=0,highlightthickness=0)
s.place(x=600, y=10,height = 20 , width = 20)

我想要更像这样的东西，有一个圆圈，没有边框：

谁能帮帮我 :)

Answer 1

试试这个：

import tkinter as tk

# Kindly plagiarised from: 
def _create_circle(self, x, y, r, **kwargs):
    return self.create_oval(x-r, y-r, x+r, y+r, **kwargs)
tk.Canvas.create_circle = _create_circle


# Please suggest a better name for the class
class ProgressBar(tk.Canvas):
    def __init__(self, height=20, radius=6, width=400, circle_colour="black",
                 colour="red", bar_width=6, bd=0, highlightthickness=0,
                 anti_bar_colour="white", **kwargs):
        super().__init__(height=height, width=width, bd=bd,
                         highlightthickness=highlightthickness, **kwargs)
        self.radius = radius
        self.height = height
        self.width = width
        self.rectangle = None
        self.circle_colour = circle_colour
        self.colour = colour
        self.bar_width = bar_width
        self.circle = None
        self.button_1_down = False
        self.create_anti_bar(anti_bar_colour)
        self.progress = 0
        super().bind("<Enter>", self.show_circle)
        super().bind("<Leave>", self.hide_circle)
        super().bind("<Button-1>", self.mouse_click)
        super().bind("<ButtonRelease-1>", self.mouse_release)
        super().bind("<B1-Motion>", self.mouse_motion)

    def create_anti_bar(self, colour):
        start_y = (self.height - self.bar_width)/2
        end_y = self.height - start_y
        start_x = self.radius
        end_x = self.width - self.radius
        # Change it to >= if you don't what the bar to appear when the
        # progress is at 0
        if start_x > end_x:
            return None
        super().create_rectangle(start_x, start_y, end_x, end_y,fill=colour,
                                 outline=colour)

    def mouse_click(self, event):
        self.button_1_down = True
        self.progress = (event.x - self.radius)/(self.width - 2*self.radius)

    def mouse_release(self, event=None):
        self.button_1_down = False

    def mouse_motion(self, event):
        if self.button_1_down:
            self.mouse_click(event)

    def hide_circle(self, event=None):
        if self.circle is not None:
            super().delete(self.circle)
            self.circle = None

    def show_circle(self, event=None):
        # Try removing the circle if we can
        self.hide_circle()
        x = (self.width - 2*self.radius)*self._progress + self.radius
        self.circle = super().create_circle(x, self.height//2, self.radius,
                                            fill=self.circle_colour,
                                            outline=self.circle_colour)

    def update_bar(self):
        # Try removing the progress bar
        if self.rectangle is not None:
            super().delete(self.rectangle)

        start_y = (self.height - self.bar_width)/2
        end_y = self.height - start_y
        start_x = self.radius
        end_x = (self.width - 2*self.radius)*self._progress + self.radius
        # Change it to >= if you don't what the bar to appear when the
        # progress is at 0
        if start_x > end_x:
            return None
        self.rectangle = super().create_rectangle(start_x, start_y, end_x,
                                                  end_y, fill=self.colour,
                                                  outline=self.colour)

    @property
    def progress(self):
        return self._progress

    @progress.setter
    def progress(self, new_value):
        # Check if the new_value is in the correct range
        if new_value < 0:
            new_value = 0
        elif new_value > 1:
            new_value = 1
        # Update self._progress
        self._progress = new_value
        # Update the progress bar
        self.update_bar()
        # If the circle was shown update it
        if self.circle is not None:
            self.show_circle()


if __name__ == "__main__":
    root = tk.Tk()
    pbar = ProgressBar()
    pbar.pack()
    pbar.progress = 0

    # keep incrementing the progress until the end then stop
    def increment_progress():
        pbar.progress += 0.001
        if pbar.progress >= 1:
            return None
        pbar.after(10, increment_progress)

    increment_progress()
    root.mainloop()

如果您不明白任何方法的作用，请告诉我。代码太多无法正确注释

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