如何跨 wxPython 框架传递信息？

Question

我使用 wxPython 创建一个父窗口“A”（一个 wx.Frame）。

在“A”中，我创建了一个子（同样是 wx.Frame）对话框式弹出窗口“B”。

每当我按下父级“A”中的给定按钮时，我都会调用此代码：

import windowB as bb

class windowA (wx.Frame):

    ... some other methods go here...

    def on_data_setup(self, event):
        os.remove("tmp.tmp")
        popUpWindow = bb.popUp(None, title='Data Manager')
        popUpWindow.Show()
        while not os.path.exists("tmp.tmp"):
            time.sleep(1)
        with open("tmp.tmp","r") as ifh:
            l = ifh.readlines()
        print l

windowB 包含在另一个文件中，它看起来像：

class windowB (wx.Frame):
    ...
    def on_exit(self,event):
        with open("tmp.tmp","w") as ofh:
            ofh.write("test")
        self.Close()

这显然不是字，因为当我在父类中调用“睡眠”时，整个程序冻结 - 我需要杀死它，因为我也不能与孩子“B”互动:(。

另外，通过临时文件传递信息效率非常低。

关键是，当我关闭它时，我需要我的子/弹出窗口 B 将信息传递回父窗口 A (B)。我该如何实现呢？ 谢谢！

Answer 1

使用引用是在 wxpython 框架之间进行通信的一种简单方法。以下示例创建一个名为“父级”的框架。父框架创建一个子框架并保存对它的引用。您可能永远不需要将信息写入磁盘以在同一进程中交换它。

import wx


class Parent(wx.Frame):
    def __init__(self):
        super().__init__(None, title="parent frame")
        btn = wx.Button(self, label="click to send a message to the child frame")
        btn.Bind(wx.EVT_BUTTON, self.on_btn)
        self.Show()
        self.CenterOnScreen(wx.BOTH)

        self.child_frame = None  # type: wx.Frame
        self.create_child_frame()

    def create_child_frame(self):
        child = wx.Frame(self, title="child frame")
        child.text = wx.TextCtrl(child)
        child.Show()
        child.SetPosition(self.GetRect().GetBottomLeft())
        # save a reference to the child frame on the parent
        self.child_frame = child

    def send_message_to_child(self, msg):
        # re-open the child frame if it's been closed
        if not bool(self.child_frame):
            self.create_child_frame()
        # accessing child frame attributes from the parent frame
        self.child_frame.text.SetValue(f"Message from parent frame: '{msg}'")

    def on_btn(self, evt):

        with wx.TextEntryDialog(self,
                                "Enter a message to pass to the child frame") as dialog:  # type: wx.TextEntryDialog
            if dialog.ShowModal() == wx.ID_OK:
                msg = dialog.GetValue()
                self.send_message_to_child(msg)


app = wx.App()
parent = Parent()
app.MainLoop()

Answer 2

我想我会继续发布这个，因为它帮助我解决了一个类似的问题......

当需要从子窗口更新主窗口时...请参阅下面的更新脚本：

import wx


class MainPage(wx.Frame):
    def __init__(self):
        super().__init__(None, title="parent frame")
        btn = wx.Button(self, size=(200, 20), pos=(80,160), label="click to send a message ")
        btn.Bind(wx.EVT_BUTTON, self.on_btn)
        #self.CenterOnScreen(VERTICAL)
        MainPage.text = wx.TextCtrl(self,size=(360, 140), pos=(10,10))
        self.Show()
        

        self.child_frame = None  # type: wx.Frame
        self.create_child_frame()

    def create_child_frame(self):
        child = wx.Frame(self, title="child frame")
        child.text = wx.TextCtrl(child)
        child.Show()
        child.SetPosition(self.GetRect().GetBottomLeft())
        # save a reference to the child frame on the parent
        self.child_frame = child

    def send_message_to_child(self, msg):
        # re-open the child frame if it's been closed
        if not bool(self.child_frame):
            self.create_child_frame()
        # accessing child frame attributes from the parent frame
        self.child_frame.text.SetValue(f"Message from child frame: '{msg}'")
        self.text.SetValue(f"Message from child frame: '{msg}'")

    def on_btn(self, evt):

        with wx.TextEntryDialog(self,
                                "Enter a message to pass to the child frame") as dialog:  # type: wx.TextEntryDialog
            if dialog.ShowModal() == wx.ID_OK:
                msg = dialog.GetValue()
                self.send_message_to_child(msg)


app = wx.App()
parent = MainPage()
app.MainLoop()