您可以像使用框架一样使用画布来绘制自己的窗口边框。但是,就像您说的那样,您不能在嵌入在画布中的小部件之上绘制画布项目;小部件始终具有最高的堆叠顺序。没有办法解决这个问题,但不清楚你是否真的需要这样做。
这是一个快速而肮脏的示例,展示了如何为自定义边框创建一个带有渐变的窗口。为了使示例简短,我没有添加任何代码来允许您移动或调整窗口大小。此外,它使用固定颜色作为渐变。
import Tkinter as tk
class GradientFrame(tk.Canvas):
'''A gradient frame which uses a canvas to draw the background'''
def __init__(self, parent, borderwidth=1, relief="sunken"):
tk.Canvas.__init__(self, parent, borderwidth=borderwidth, relief=relief)
self._color1 = "red"
self._color2 = "black"
self.bind("<Configure>", self._draw_gradient)
def _draw_gradient(self, event=None):
'''Draw the gradient'''
self.delete("gradient")
width = self.winfo_width()
height = self.winfo_height()
limit = width
(r1,g1,b1) = self.winfo_rgb(self._color1)
(r2,g2,b2) = self.winfo_rgb(self._color2)
r_ratio = float(r2-r1) / limit
g_ratio = float(g2-g1) / limit
b_ratio = float(b2-b1) / limit
for i in range(limit):
nr = int(r1 + (r_ratio * i))
ng = int(g1 + (g_ratio * i))
nb = int(b1 + (b_ratio * i))
color = "#%4.4x%4.4x%4.4x" % (nr,ng,nb)
self.create_line(i,0,i,height, tags=("gradient",), fill=color)
self.lower("gradient")
class SampleApp(tk.Tk):
def __init__(self):
tk.Tk.__init__(self)
self.wm_overrideredirect(True)
gradient_frame = GradientFrame(self)
gradient_frame.pack(side="top", fill="both", expand=True)
inner_frame = tk.Frame(gradient_frame)
inner_frame.pack(side="top", fill="both", expand=True, padx=8, pady=(16,8))
b1 = tk.Button(inner_frame, text="Close",command=self.destroy)
t1 = tk.Text(inner_frame, width=40, height=10)
b1.pack(side="top")
t1.pack(side="top", fill="both", expand=True)
if __name__ == "__main__":
app = SampleApp()
app.mainloop()