问题描述

我经常使用这个网站来解决我在使用 Python 编程时遇到的小问题.这一次，不知何故我找不到适合我情况的解决方案.所以，这是我的问题:

I have been using this website pretty often in order to solve small issues that I have while programming in Python. This time, somehow I could not find a suitable solution for my situation. So, here is my problem:

我想动态地将条目添加到 gtk.VBox 小部件.问题是它不能按照我想要的方式工作.我只有一个按钮，它的作用是向 VBox 添加一个额外的小部件.不幸的是，小部件没有出现在窗口上.我想，我必须添加类似 repaint 函数调用的东西，但我没有找到类似的东西.这是一个示例代码，显示了我的问题:

I want to dynamically add entries to a gtk.VBox widget. The problem is that it doesn't work the way I want it to work. I simply have a button, whose action is to add an additional widget to a VBox. Unfortunately the widget doesn't appear on the window. I guess, I have to add something like a repaint function call, but I didn't find anything like that. Here is a sample code, showing my problem:

import gtk

class DynamicVbox:

    def __init__(self):
        self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
        self.window.connect("destroy", self.close_application)
        self.window.set_size_request(400,320)
        #a hBox to put the button and the dynamic vBox
        hBox = gtk.HBox(False, 0)

        addButton = gtk.Button("add checkbox")
        addButton.connect("clicked", self.AddCheckButton)

        self.vBox = gtk.VBox(False, 0)
        self.vBox.pack_start(gtk.CheckButton("CheckButton"), True, True, 1)
        hBox.pack_start(self.vBox, True, True, 5)
        hBox.pack_end(addButton, False, False, 5)
        self.window.add(hBox)

        #start gtk
        self.window.show_all()
        gtk.main()

    def AddCheckButton(self, button):
        self.vBox.pack_start(gtk.CheckButton("CheckButton"), True, True, 1)
        print "adding checkbox..."

    def close_application(self, widget):
        gtk.main_quit()

 # run it

a = DynamicVbox()

感谢任何帮助.提前致谢.

A appreciate any help. Thanks in advance.

推荐答案

新的检查按钮在那里，但在你调用 show() 之前是不可见的:

The new check button is there, but not visible until you call show() on it:

def AddCheckButton(self, button):
    button = gtk.CheckButton("CheckButton")
    self.vBox.pack_start(button, True, True, 1)
    button.show()
    print "adding checkbox..."

这篇关于动态更新 gtk.VBox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跟版网！