tkinter固定画布大小

Question

我目前正在尝试创建一个画布，其上会有其他对象，我想在画布上的对象占用太多空间时使用滚动条，以便窗口的大小将会保持原样。 问题是，尽管我为画布设置了初始大小，但它会更改为适合其上的所有对象。我可以使画布保持特定的大小，以便我可以使用滚动条代替？

Answer 1

下面是一个例子：

from tkinter import * 

class zoomer(Tk): 

    def __init__(self): 
     x=100 
     y=100 
     Tk.__init__(self) 
     self.border = 10 
     self.size_x = x 
     self.size_y = y 

     #SIZE 
     self.app_sizex = 200 
     self.app_sizey = 200 
     fontSize=int(x/20) 

     self.title("Graphic") 
     self.geometry(str(self.app_sizex+10) + "x" + str(self.app_sizey+40)) 

     #CANVAS + BORDER 
     self.canvas = Canvas(self, width = self.app_sizex, height = self.app_sizey, scrollregion=(0,0,x,y)) 
     self.canvas.grid(row=0, column=0, sticky="nsew") 
     self.canvas.create_line(self.border, self.border, self.border, y-self.border) 
     self.canvas.create_line(x-self.border, self.border, x-self.border, y-self.border) 
     self.canvas.create_line(self.border, self.border, x-self.border, self.border) 
     self.canvas.create_line(self.border, y-self.border, x-self.border, y-self.border) 
     self.canvas.create_line(self.border, self.border, x-self.border, y-self.border) 
     text1=self.canvas.create_text(50, 50, fill="white",font=("Purisa", fontSize)) 
     self.canvas.itemconfig(text1, text="Graphic Text") 

     #SCROLLING BARS 
     self.vbar=Scrollbar(self,orient=VERTICAL) 
     self.vbar.grid(row=0, column=1, sticky="ns") 
     self.vbar.config(command=self.canvas.yview) 
     self.hbar=Scrollbar(self,orient=HORIZONTAL) 
     self.hbar.grid(row=2, column=0, sticky="ew") 
     self.hbar.config(command=self.canvas.xview) 
     self.canvas.config(xscrollcommand=self.hbar.set, yscrollcommand=self.vbar.set) 

     #zoom button 
     save_button = Button(self, text = "Zoom") 
     save_button["command"] = lambda: self.zoom_in() 
     save_button.grid(row=3, column = 0, pady = 5) 

    def zoom_in(self): 
     #Clean canvas 
     self.canvas.delete("all") 
     self.size_x = int(self.size_x * 1.1) 
     self.size_y = int(self.size_y * 1.1) 
     x=self.size_x 
     y=self.size_y 
     fontSize=int(x/20) 
     self.canvas.create_line(self.border, self.border, self.border, y-self.border) 
     self.canvas.create_line(x-self.border, self.border, x-self.border, y-self.border) 
     self.canvas.create_line(self.border, self.border, x-self.border, self.border) 
     self.canvas.create_line(self.border, y-self.border, x-self.border, y-self.border) 
     self.canvas.create_line(self.border, self.border, x-self.border, y-self.border) 
     text1=self.canvas.create_text(self.size_x/2, self.size_y/2, fill="white",font=("Purisa", fontSize)) 
     self.canvas.itemconfig(text1, text="Graphic Text") 
     self.canvas.configure(scrollregion=self.canvas.bbox("all")) 

     #SCROLLING BARS 
     self.vbar.config(command=self.canvas.yview) 
     self.hbar.config(command=self.canvas.xview) 
     self.canvas.config(xscrollcommand=self.hbar.set, yscrollcommand=self.vbar.set) 


if __name__ == '__main__': 
    my_gui=zoomer() 
    my_gui.mainloop() 

来自：Tkinter on canvas resize scroll bar does not adjust

Answer 2

myscrollbar =滚动条（myframe，东方= “垂直”，命令= canvas.yview）

canvas.configure（yscrollcommand = myscrollbar.set）