我的目标是创建一个带有垂直和水平滚动的GUI TKinter类。
我有一个图表,其尺寸大于GUI的窗口尺寸。我将图表放在画布中以启用滚动条功能,允许垂直和水平滚动。
但是,当我运行代码时,图形大小会自动适应GUI窗口的大小,从而扭曲图形比率,滚动条功能不起作用。
有谁知道这个解决方案?这是代码:
from tkinter import *
from numpy import arange, sin, pi
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib.figure import Figure
class App(Tk):
def __init__(self):
Tk.__init__(self)
Frame_parent = Frame(self, bg = 'white', borderwidth = 0, relief = FLAT)
Frame_parent.pack(side = TOP, padx = 1, pady = 1)
Canvas_parent = Canvas(Frame_parent, scrollregion = (0, 0, 2000, 2000))
vbar=Scrollbar(Frame_parent, orient = VERTICAL)
vbar.pack(side = RIGHT, fill = Y)
vbar.config(command = Canvas_parent.yview)
hbar=Scrollbar(Frame_parent, orient=HORIZONTAL)
hbar.pack(side=BOTTOM,fill=X)
hbar.config(command=Canvas_parent.xview)
Canvas_parent.config(xscrollcommand=hbar.set, yscrollcommand = vbar.set)
Canvas_parent.pack(side = LEFT, expand = True, fill = BOTH)
Frame_child = Frame(Canvas_parent, bg = 'white', borderwidth = 2, relief = FLAT)
Frame_child.pack(side = TOP, padx = 10, pady = 1)
f = Figure(figsize=(6, 5), dpi=100)
a = f.add_subplot(111)
t = arange(0.0, 3.0, 0.01)
s = sin(2*pi*t)
a.plot(t, s)
canvas = FigureCanvasTkAgg(f, Frame_child)
canvas.show()
canvas.get_tk_widget().pack(side = BOTTOM, fill = BOTH, expand = False)
if __name__ == "__main__":
app = App()
app.geometry("400x400+51+51")
app.title("Test")
app.mainloop()
答案 0 :(得分:2)
首先请注意的是,您有许多无用的容器小部件。所以在我下面的解决方案中,我将删除所有无用的代码;我指的是与Frame_parent
,Frame_child
和Canvas_parent
相关的所有内容。请注意,在我的解决方案中,我可以让这些小部件到位,但原则上,我不编写我不使用的代码。
第二个重要提示是您要滚动canvas
的图表,但您的代码正在尝试滚动Canvas_parent
窗口小部件。这是你问题的核心。因此,您需要使用FigureCanvasTkAgg.get_tk_widget()
并对其返回的对象应用config()
方法。
这意味着您需要更改:
Canvas_parent.config(xscrollcommand=hbar.set, yscrollcommand = vbar.set)
要:
canvas.get_tk_widget().config(xscrollcommand=hbar.set, yscrollcommand=vbar.set)
以下是解决方案:
from tkinter import *
from numpy import arange, sin, pi
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib.figure import Figure
class App(Tk):
def __init__(self):
Tk.__init__(self)
self.configure(width=400, height=400)
f = Figure(figsize=(6, 5), dpi=100)
a = f.add_subplot(111)
t = arange(0.0, 3.0, 0.01)
s = sin(2*pi*t)
a.plot(t, s)
canvas = FigureCanvasTkAgg(f, self)
canvas.show()
canvas.get_tk_widget().grid(row=0, column=0)
vbar=Scrollbar(self, orient = VERTICAL)
vbar.grid(row=0, column=1)
hbar=Scrollbar(self, orient=HORIZONTAL)
hbar.grid(row=1, column=0)
canvas.get_tk_widget().config(xscrollcommand=hbar.set, yscrollcommand = vbar.set)
hbar.config(command=canvas.get_tk_widget().xview)
vbar.config(command=canvas.get_tk_widget().yview)
if __name__ == "__main__":
app = App()
app.geometry("400x400+51+51")
app.title("Test")
app.mainloop()
以下是运行上述程序的屏幕截图:
请注意,如果您希望拉伸滚动条以使其在代码中看起来更长,则可以为vbar.grid(..., sticky=N+S, ...)
添加hbar
选项,为hbar.grid(..., sticky=W+E, ...)
添加hbar
。< / p>