tkinter中的事件和绑定无法循环运行 [英] Events and Bindings in tkinter does not work in loop

问题描述

我正在尝试使用tkinter模块在循环中创建绑定.

from tkinter import *
class Gui(Frame):
    def __init__(self, parent):
        Frame.__init__(self, parent)  
        self.parent = parent
        self.initUI()
    def Arrays(self,rankings):
        self.panels = {}
        self.helpLf = LabelFrame(self, text="Array Layout:")
        self.helpLf.grid(row=10, column=9, columnspan=5, rowspan=8)
        for rows in range(10):
            for cols in range(10):
                x  = str(rows)+"_"+str(cols)
                self.row = Frame(self.helpLf)
                self.bat = Button(self.helpLf,text=" ", bg = "white")
                self.bat.grid(row=10+rows, column=cols)
                self.panels[x] = self.bat
                self.panels[x].bind('<Button-1>', self.make_lambda())
                self.panels[x].bind('<Double-1>', self.color_change1)

    def color_change(self, event):
        """Changes the button's color"""
        self.bat.configure(bg = "green")
    def color_change1(self, event):
        self.bat.configure(bg = "red")

这里有10X10 = 100个按钮.活页夹仅适用于最后一个按钮.有谁知道我该如何对所有按钮应用活页夹?

解决方案

您在color_change1中使用了self.bat，但是self.bat保留了最后一个按钮，因为您将其写在了循环中.但是您将所有按钮都保留在self.panels[x]中，以便可以访问任何按钮.这样您就可以使用它.

但是有一个更简单的解决方案-绑定使用变量event将有关事件的某些信息发送到执行的函数.例如，event.widget允许您访问执行功能color_change1的窗口小部件，因此您可以使用它:

def color_change1(self, event):
    event.widget.configure(bg = "red")

请参阅第事件和绑定 中的事件属性" >

I am trying to create binding in a loop using tkinter module.

from tkinter import *
class Gui(Frame):
    def __init__(self, parent):
        Frame.__init__(self, parent)  
        self.parent = parent
        self.initUI()
    def Arrays(self,rankings):
        self.panels = {}
        self.helpLf = LabelFrame(self, text="Array Layout:")
        self.helpLf.grid(row=10, column=9, columnspan=5, rowspan=8)
        for rows in range(10):
            for cols in range(10):
                x  = str(rows)+"_"+str(cols)
                self.row = Frame(self.helpLf)
                self.bat = Button(self.helpLf,text=" ", bg = "white")
                self.bat.grid(row=10+rows, column=cols)
                self.panels[x] = self.bat
                self.panels[x].bind('<Button-1>', self.make_lambda())
                self.panels[x].bind('<Double-1>', self.color_change1)

    def color_change(self, event):
        """Changes the button's color"""
        self.bat.configure(bg = "green")
    def color_change1(self, event):
        self.bat.configure(bg = "red")

There are 10X10= 100 buttons here. the binder works only for the last button. Does anyone know how can I apply the binder for all the buttons?

解决方案

You use self.bat in color_change1 but self.bat keeps last button because you ovewrite it in loop. But you keep all buttons in self.panels[x] to have access to any button. So you could use it.

But there is simpler solution - binding use variable event to send some information about event to executed function. For example event.widget give you access to widget which execute function color_change1 so you can use it:

def color_change1(self, event):
    event.widget.configure(bg = "red")

See "Event Attributes" on page Events and Bindings

这篇关于tkinter中的事件和绑定无法循环运行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！