我需要在tkinter中获取一个画布,以将其宽度设置为窗口的宽度,然后在用户使窗口变小/变大时动态调整画布的大小。
有什么办法(轻松)吗?
我以为我会添加一些额外的代码来扩展@fredtantini的答案,因为它不涉及如何更新绘制在上的小部件的形状Canvas。
Canvas
为此,您需要使用scale方法并标记所有小部件。下面是一个完整的示例。
scale
from Tkinter import * # a subclass of Canvas for dealing with resizing of windows class ResizingCanvas(Canvas): def __init__(self,parent,**kwargs): Canvas.__init__(self,parent,**kwargs) self.bind("<Configure>", self.on_resize) self.height = self.winfo_reqheight() self.width = self.winfo_reqwidth() def on_resize(self,event): # determine the ratio of old width/height to new width/height wscale = float(event.width)/self.width hscale = float(event.height)/self.height self.width = event.width self.height = event.height # resize the canvas self.config(width=self.width, height=self.height) # rescale all the objects tagged with the "all" tag self.scale("all",0,0,wscale,hscale) def main(): root = Tk() myframe = Frame(root) myframe.pack(fill=BOTH, expand=YES) mycanvas = ResizingCanvas(myframe,width=850, height=400, bg="red", highlightthickness=0) mycanvas.pack(fill=BOTH, expand=YES) # add some widgets to the canvas mycanvas.create_line(0, 0, 200, 100) mycanvas.create_line(0, 100, 200, 0, fill="red", dash=(4, 4)) mycanvas.create_rectangle(50, 25, 150, 75, fill="blue") # tag all of the drawn widgets mycanvas.addtag_all("all") root.mainloop() if __name__ == "__main__": main()