python - 如何在标签中的 tkinter 上制作字幕？

Question

我有这个源代码:

from Tkinter import *
import tkMessageBox
import time
class Window(Tk):
    def __init__(self,parent):
        Tk.__init__(self,parent)
        self.parent = parent
        self.initialize()


    def initialize(self):
        self.geometry('450x250+0+0')
        self.configure(background="#379DDB")
        self.title('Konversi Bilangan')
        **self.label = Label(self, text='Konversi Dari',font=('times',24,'italic'),bg="#379DDB")**
        self.label.pack()
        self.tombol=Button(self, text='Biner',font=(18),borderwidth='3px',width=10,command=self.OnButtonClick1,bg="#69ABD3")
        self.tombol.pack(side=TOP)
        self.tombol2=Button(self, text='Desimal',font=(18),borderwidth='3px' ,width=10, command=self.OnButtonClick2,bg="#69ABD3")
        self.tombol2.pack(side=TOP)
        self.tombol3=Button(self, text='Oktal',font=(18),borderwidth='3px' ,width=10,command=self.OnButtonClick3,bg="#69ABD3")
        self.tombol3.pack()
        self.tombol4=Button(self, text='Hexa',font=(18),borderwidth='3px' ,width=10,command=self.OnButtonClick4,bg="#69ABD3")
        self.tombol4.pack()
        self.tombol5=Button(self,text='Quit',font=(18),borderwidth='3px' ,width=10, fg='red', command= self.quit,bg="#69ABD3")
        self.tombol5.pack()

如何用我粗体制作选框？如果不可能如何在 tkinter 中像 vb 那样制作选框？

Answer 1

在 tkinter 中制作动画的模式是使用 after 一次安排一帧动画。它看起来像这样，其中 fps 定义为每秒所需的帧数，widget 是 tkinter 小部件:

def animate():
    <draw one frame of animation>
    widget.after(int(1000/fps), animate)

对于选取框，最简单的解决方案之一是使用 Canvas ，因为它有一个方便的 move 方法，可用于从右向左移动文本。

这是一个例子:

import tkinter as tk

class Marquee(tk.Canvas):
    def __init__(self, parent, text, margin=2, borderwidth=1, relief='flat', fps=30):
        super().__init__(parent, borderwidth=borderwidth, relief=relief)

        self.fps = fps
        
        # start by drawing the text off screen, then asking the canvas
        # how much space we need. Use that to compute the initial size
        # of the canvas. 
        text = self.create_text(0, -1000, text=text, anchor="w", tags=("text",))
        (x0, y0, x1, y1) = self.bbox("text")
        width = (x1 - x0) + (2*margin) + (2*borderwidth)
        height = (y1 - y0) + (2*margin) + (2*borderwidth)
        self.configure(width=width, height=height)

        # start the animation
        self.animate()

    def animate(self):
        (x0, y0, x1, y1) = self.bbox("text")
        if x1 < 0 or y0 < 0:
            # everything is off the screen; reset the X
            # to be just past the right margin
            x0 = self.winfo_width()
            y0 = int(self.winfo_height()/2)
            self.coords("text", x0, y0)
        else:
            self.move("text", -1, 0)

        # do again in a few milliseconds
        self.after_id = self.after(int(1000/self.fps), self.animate)
        
root = tk.Tk()
marquee = Marquee(root, text="Hello, world", borderwidth=1, relief="sunken")
marquee.pack(side="top", fill="x", pady=20)

root.mainloop()