如何在wxpython中监听帧size/move改变事件

Question

在 wxpython 中 publish.listen 大小更改事件的正确方法是什么？

我确信这很简单，但我无法理解如何在 class 之间很好地实现它（请原谅任何新手明显的错误）。

我可以使用 pypubsub 发送事件，但这只会在创建 UI class 时被监听器捕获（即监听一次，而不是在随后调整框架大小时）。

听众：

    # listeners - define before the event
    pub.subscribe(self.on_resized, 'size_changed')
    pub.subscribe(self.on_relocated, 'pos_changed')

出版商：

def on_size(self, event):
    _size = event.GetSize()
    pub.sendMessage('size_changed', size=_size)
    
def on_move(self, event):
    _pos = event.GetPosition()
    pub.sendMessage('pos_changed', pos=_pos)

我试过使用 CallAfter - 但这似乎没有帮助（不太确定我在用它做什么，但认为它可能会在之后调用事件）

def on_size(self, event):
    _size = event.GetSize()
    wx.CallAfter(pub.sendMessage, 'size_changed', size=_size)


def on_move(self, event):
    _pos = event.GetPosition()
    wx.CallAfter(pub.sendMessage, 'pos_changed', pos=_pos)

我还尝试了 CallAfter 的第二种变体，它似乎被听了两次（改进？），但我知道这是由于结果 AssertionError

格式不正确

def on_size(self, event):
    _size = event.GetSize()
    # test incorrect formatting of call after...
    wx.CallAfter(pub.sendMessage('size_changed', size=_size))

def on_move(self, event):
    _pos = event.GetPosition()
    pub.sendMessage('pos_changed', pos=_pos)

提前感谢任何help/pointers

最小演示：

import pubsub.pub as pub
import wx


class UI(wx.Frame):
    def __init__(self, *args, **kwargs):

        # init base class
        super().__init__(*args, **kwargs)

        # bindings
        self.Bind(wx.EVT_MOVE, self.on_move)
        self.Bind(wx.EVT_SIZE, self.on_size)

    def on_size(self, event):
        _size = event.GetSize()
        print('[UI] resized to :', _size)
        # broadcast new size
        pub.sendMessage('size_changed', size=_size)
        # wx.CallAfter(pub.sendMessage, 'size_changed', size=_size)

        # test incorrect formatting of call after...
        # wx.CallAfter(pub.sendMessage('size_changed', size=_size))

    def on_move(self, event):
        _pos = event.GetPosition()
        print('[UI] moved to :', _pos)
        # broadcast new location
        pub.sendMessage('pos_changed', pos=_pos)
        # wx.CallAfter(pub.sendMessage, 'pos_changed', pos=_pos)



class CustomFrame(object):

    def __init__(self, parent=None, _id=wx.ID_ANY, title='test'):

        # listeners - define before the event
        pub.subscribe(self.on_resized, 'size_changed')
        pub.subscribe(self.on_relocated, 'pos_changed')

        self._id = _id
        self._ui = UI(parent=parent, id=_id, title=title)
        self._ui.Show()

    def on_resized(self, size):
        print('[CustomFrame] The new size is :=', size)
        # do something with the new size

    def on_relocated(self, pos):
        print('[CustomFrame] The new location is :=', pos)
        # do something with the new position


if __name__ == '__main__':
    app = wx.App()
    CustomFrame(title='Demo')
    app.MainLoop()

Answer 1

我认为这是因为 CustomFrame 不是一个框架，它是一些 object。
如果将 CustomFrame 的定义更改为以下代码，它应该可以工作。也就是说，不清楚您要在此处实现什么目标。

class CustomFrame(wx.Frame):

    def __init__(self, parent=None, _id=wx.ID_ANY, title='test'):

        # init base class
        super(CustomFrame, self).__init__(parent)
        # listeners - define before the event
        pub.subscribe(self.on_resized, 'size_changed')
        pub.subscribe(self.on_relocated, 'pos_changed')

        self._id = _id
        self._ui = UI(parent=self, id=_id, title=title)
        self._ui.Show()

如何在wxpython中监听帧size/move改变事件

How to listen to a frame size/move change event in wxpython

wxpython

pypubsub