我使用tkinter和python 3.4在画布上创建了两个重叠的按钮:
现在,我想将button1放在最前面(您现在无法看到的按钮,因为它在button2下方)
self.canvas.lift(self.button1)
但是由于某种原因,这是行不通的。只是什么也没有发生。降低button2也无效。你能告诉我为什么吗?
import tkinter as tk
class Example(tk.Frame):
def __init__(self, root):
tk.Frame.__init__(self, root)
self.canvas = tk.Canvas(self, width=400, height=400, background="bisque")
self.canvas.create_text(50,10, anchor="nw", text="Click to lift button1")
self.canvas.grid(row=0, column=0, sticky="nsew")
self.canvas.bind("<ButtonPress-1>", self.click_on_canvas)
self.button1 = tk.Button(self.canvas, text="button1")
self.button2 = tk.Button(self.canvas, text="button2")
x = 40
self.canvas.create_window(x, x, window=self.button1)
self.canvas.create_window(x+5, x+5, window=self.button2)
def click_on_canvas(self, event):
print("lifting", self.button1)
self.canvas.lift(self.button1)
self.canvas.lower(self.button2)
if __name__ == "__main__":
root = tk.Tk()
Example(root).pack(fill="both", expand=True)
root.mainloop()
lift()
您无需直接在画布上调用,而需要在小部件实例上直接调用它:
def click_on_canvas(self, event):
print("lifting", self.button1)
self.button1.lift()
self.button2.lower() # Not necessary to both lift and lower
这仅适用于通过画布上的窗口显示的小部件。
如果要绘制线条或矩形之类的对象,则可以像以前一样在画布实例上使用lift()
或tag_raise()
。
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我来说两句