[英]Python tkinter change variable label state and statusbar
我在這里確實有一點問題。 這是關於TKinter中標簽變量的交換。 我的程序不會刷新該值。
class Application(Frame):
def __init__(self,parent,**kw):
Frame.__init__(self,parent,**kw)
self.x = None
self.directory = None
self.autostate = None
self.state = "closed"
self.GUI2()
def state(self):
#change states
self.stateVar="open"
self.statusbar = "Status: Opening gate..."
#update tkinter
self.group.update_idletasks()
self.w.update_idletasks()
def GUI2(self):
self.statusbar = "Status:..."
# menu left
self.menu_left = tk.Frame(root, width=150, bg="red", bd=1, relief=RIDGE)
self.menu_left_upper = tk.Frame(self.menu_left, width=300, height=900, bg="#C0C0C0")
self.menu_left_lower = tk.Frame(self.menu_left, width=300, bd=1, relief=GROOVE)
self.label1 = tk.Label(self.menu_left_lower, relief=FLAT, bg="blue" )
self.button1 = Button(self.menu_left_lower, text="RUN")
self.test = tk.Label(self.menu_left_upper, text="info", bg="#C0C0C0")
self.menu_left_upper.pack(side="top", fill="both", expand=TRUE)
self.menu_left_lower.pack(side="top", fill="both", expand=FALSE)
# right area
self.some_title_frame = tk.Frame(root, bg="#dfdfdf", bd=1, relief=RIDGE)
self.some_title = tk.Label(self.some_title_frame, text="some title", bg="#dfdfdf")
self.text_area = Listbox(root, width=50, height=10, background="#ffffff", relief=GROOVE)
#Label and Button
self.group = LabelFrame(self.menu_left_upper, text="info", height=70)
self.group.pack(side="top", fill="both", expand=TRUE)
Button(self.menu_left_lower, text='Press', command=self.state).pack(side="bottom")
self.w = Label(self.group, text='State='+self.stateVar) #text printed!
self.w.pack(expand=TRUE)
# status bar
self.status_frame = tk.Frame(root)
self.status = tk.Label(self.status_frame, text=self.statusbar, bd=1, relief=SUNKEN) #statusbar printed here
self.status.pack(fill="both", expand=True)
self.menu_left.grid(row=0, column=0, rowspan=2, sticky="nsew")
self.status_frame.grid(row=2, column=0, columnspan=2, sticky="ew")
root.grid_rowconfigure(1, weight=1)
root.grid_columnconfigure(1, weight=1)
#Starts the main loop and causes the class to interact with the init function
if __name__ == '__main__':
root = Tk()
root.title("simulation")
app = Application(root)
app.grid()
root.mainloop()
在這里您可以看到整個代碼。
重要的是檢查#tab1中是否有按鈕。 此按鈕指的是def狀態(自身):此按鈕需要更改標簽和狀態欄。 在程序中我將它們添加到self.w和self.status中,並添加了一個#text打印內容! 下線之后。
錯誤在於Label
參數中:如果輸入變量已更新,則不會更新tekst參數。 您應該將stateVar
分配給Label
的textvariable
關鍵字參數,並且不使用text
參數。
下面是一個示例程序,可以幫助您弄清楚如何更改標簽的文本。 他們的關鍵是創建一個StringVar並將標簽指向此標簽,以便在StringVar出現時更新標簽。
from Tkinter import *
class Application(Frame):
def __init__(self,parent,**kw):
Frame.__init__(self,parent,**kw)
# Create a String variable to store our status string
self.stateVar = StringVar()
self.stateVar.set("Initial Value")
# Create a label to display the status
self.label1 = Label(textvariable=self.stateVar)
self.label1.grid()
# Create a button which will change the status
self.button = Button(text="Press me", command=self.change)
self.button.grid()
def change(self):
"""Called when the button is pressed"""
self.stateVar.set('You pressed the button')
if __name__ == '__main__':
root = Tk()
root.title("simulation")
app = Application(root)
app.grid()
root.mainloop()
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