Tkinter Lambda按钮

Question

 from Tkinter import *
 import os

 ALL = N+S+W+E

 class Application(Frame):
def __init__(self, master=None):
    Frame.__init__(self, master)
    self.master.rowconfigure(0, weight=1)
    self.master.columnconfigure(0, weight=1)
    self.grid(sticky=ALL)

    for r in range(2):
        self.rowconfigure(r, weight=1)

        names = {0:'RED', 1:'BLUE', 2:'GREEN', 3:'BLACK', 4:'OPEN'}    
    for c, colname in enumerate(names):
        name = names[c]
        self.columnconfigure(c, weight=1)
        if colname < 4:
            Button(self, text=name, command = lambda x = name:  self.setcolor(x)).grid(row=2, column=c, sticky=ALL)
        else:
            Button(self ,width =30, text=name, command=self.doFileOpen).grid(row=2,column=c,sticky=ALL)  

    Frame1 = Frame(self, bg="red")
    Frame1.grid(row = 0, column = 0, rowspan = 1, columnspan = 2, sticky = ALL)
    Frame1.bind("<Button-1>", self.handler_1)
    Frame2 = Frame(self, bg="yellow")
    Frame2.grid(row = 1, column = 0, rowspan = 1, columnspan = 2, sticky = ALL)
    Frame2.bind("<Button-1>", self.handler_2)
    Frame3 = Frame(self)
    Frame3.grid(row = 0, column = 2, rowspan = 2, columnspan = 3, sticky = ALL)
    self.text_in = Entry(Frame3)
    self.output = Text(Frame3)
    self.text_in.pack(fill = X, expand=False)
    self.output.pack(fill = BOTH, expand=True)


def handler_1(event):
        print("clicked Frame 1 at", event.x, event.y)

def handler_2(event):
        print("clicked Frame 2 at", event.x, event.y)

def doFileOpen(self):
    eText = self.text_in.get()
    self.output.delete(1.0,END)
    self.output.insert(1.0, eText)

def setcolor(self,bname):



 root = Tk()
 app = Application(master=root)
 app.mainloop()

我试图在按下其中一个按钮时调用setcolor定义<；4。我在写设置颜色定义时遇到问题。当我按下按钮时，最好的方法是改变从输入框收集的文本框中文本的颜色？ 当我单击“红色”框时，文本变为红色，“蓝色”变为蓝色等等

我需要再打一次dofileopen吗？或者我可以在事后更改颜色吗？在

Answer 1

我不确定我是否理解正确，但您问的是如何编写setcolor函数，使其接受颜色，然后设置相应文本框的颜色？你可以这样做：

def setcolor(self,bname):
    if bname == "RED": #or 1, can't tell how you've written it
        self.text_in.config(foreground = RED) #I think that's how colors work in tkinter
    elif bname == "BLUE":
        self.text_in.config(foreground = BLUE)
    #etc etc

它假定self具有您想要更改的Entry。在

Answer 2

所有Tkinter小部件都有一个configure方法，可以让您更改与该小部件相关联的任何选项。例如，要更改小部件的前景色，请执行以下操作：

self.output.configure(foreground="red")

对于文本小部件，可以通过配置一个标记，然后将该标记添加到文本范围来更改字符范围的属性。例如：

^{pr2}$