本文介绍了Tkinter在canvas上调整大小滚动条不会调整的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
虽然我相信我的问题很简单，我只是找不到答案或找出如何解决这个问题。
基本上，我有一个画布，一旦一个按钮被按下它被调整大小（像放大），但是，我的滚动条不调整，以覆盖孔滚动区域。
Although I believe my problem is simple, I just can't find an answer nor figure out how to fix this.Basically, I have a canvas that once a button is pressed it gets resized (like a zoom in), however, my scrolling bars do not adjust in order to cover the hole scrolling area.
有谁知道如何解决这个问题？
Does anyone knows how to fix this?
代码:(有点讨厌）
from Tkinter import *
class Graphic(Tk): #Graphical Interface
def __init__(self, x, y):
#INITIALIZATION
Tk.__init__(self)
self.border = 10
self.size_x = x
self.size_y = y
self.mouse = ""
self.cross_list = []
self.mode = ""
#SIZE
self.app_sizex = 1800
self.app_sizey = 1000
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.cross_x = self.canvas.create_line(self.border, self.border, self.border, self.border)
self.cross_y = self.canvas.create_line(self.border, self.border, self.border, self.border)
#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)
#BUTTONS
self.buttonframe = Frame(self)
self.buttonframe.grid(row=1, column=0)
Button(self.buttonframe, text = "+", command=self.zoom_in).grid(row=0, column=0)
Button(self.buttonframe, text = "-").grid(row=0, column=1)
self.canvas.bind("<1>", lambda event: self.canvas.focus_set())
self.canvas.bind("a", lambda event: self.canvas.xview_scroll(-1, "units"))
self.canvas.bind("d", lambda event: self.canvas.xview_scroll( 1, "units"))
self.canvas.bind("w", lambda event: self.canvas.yview_scroll(-1, "units"))
self.canvas.bind("s", lambda event: self.canvas.yview_scroll( 1, "units"))
self.canvas.focus_set()
def zoom_in(self):
#Clean canvas
self.canvas.delete("all")
self.size_x = self.size_x * 1.1
self.size_y = self.size_y * 1.1
x=self.size_x
y=self.size_y
self.canvas.scrollregion=(0,0,self.size_x,self.size_y)
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)
#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)
graphics_window = Graphic(1000, 1000)
graphics_window.mainloop()
推荐答案
我花了一段时间没有一个Minimal，Complete，运行我认为你的想法。我自由地添加了一些东西，看看当我们放大。查看：
It took me a while without a Minimal, Complete, and Verifiable Example but I got something running that I think does what you had in mind. I took the liberty of adding something to look at when we zoomed. Check it out:
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()
我会离开你失去的一个练习。 （这意味着我得到它运行，但太懒了，回去，弄清楚究竟发生了什么错误。）
I will leave what you were missing as an exercise. (That means I got it running but am too lazy to go back and figure out exactly what went wrong.)
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