在SplitterWindow wxpython中将文本从面板更改为其他面板

Question

我怎样才能让代码正常工作我的意思是我尝试通过单击按钮来更改文本，但它给了我一个错误，请帮助。 提前谢谢大家。

导入 wx

将 wx.grid 导入为 gridlib

类RegularPanel(wx.Panel)：

def __init__(self, parent):

    wx.Panel.__init__(self, parent)

    self.SetBackgroundColour("blue")

    button1 = wx.Button(self, label="change the text")

    self.Bind(wx.EVT_BUTTON, self.OnChange, id=button1.GetId())

def OnChange(self, event):

    value = str(self.text.GetLabel())

    value = "this works"

    self.text.SetLabel(str(value))

class OtherPanel(wx.Panel):

def __init__(self, parent):

    wx.Panel.__init__(self, parent)

    self.SetBackgroundColour("white")

    self.text = wx.StaticText(self, -1, 'try to change this text', (40, 60))

类 GridPanel(wx.Panel)：

def __init__(self, parent):

    wx.Panel.__init__(self, parent)

    self.grid = gridlib.Grid(self, style=wx.BORDER_SUNKEN)

    self.grid.CreateGrid(20,8)

    sizer = wx.BoxSizer(wx.VERTICAL)

    sizer.Add(self.grid, 1, wx.EXPAND)

    self.SetSizer(sizer)

类 MainPanel(wx.Panel):

def __init__(self, parent):

    wx.Panel.__init__(self, parent)

    notebook = wx.Notebook(self)

    page = wx.SplitterWindow(notebook)

    notebook.AddPage(page, "Splitter")

    hSplitter = wx.SplitterWindow(page)

    panelOne = OtherPanel(hSplitter)

    panelTwo = GridPanel(hSplitter)

    hSplitter.SplitVertically(panelOne, panelTwo)

    hSplitter.SetSashGravity(0.5)

    panelThree = RegularPanel(page)

    page.SplitHorizontally(hSplitter, panelThree)

    page.SetSashGravity(0.5)

    sizer = wx.BoxSizer(wx.VERTICAL)

    sizer.Add(notebook, 1, wx.EXPAND)

    self.SetSizer(sizer)

类 MainFrame(wx.Frame):

def __init__(self):

    wx.Frame.__init__(self, None, title="Nested Splitters",
                      size=(800,600))
    panel = MainPanel(self)
    self.Show()

如果 name == "ma​​in":

app = wx.App(False)

frame = MainFrame()

app.MainLoop()

Answer 1

问题是RegularPanel 没有对self.text 的引用（即不知道），因为它是创建并存在于OtherPanel 中的。

有几种方法可以完成这项工作。在这种情况下，最简单的方法是在实例化 OtherPanel 实例时将其传递给 RegularPanel。然后，您可以参考另一个面板并访问其小部件。

这是您修改后的代码：

import wx

import wx.grid as gridlib

class RegularPanel(wx.Panel):

    def __init__(self, parent, other_panel):  # <-- New argument added

        wx.Panel.__init__(self, parent)
        frame = wx.GetTopLevelParent(self) 
        self.other_panel = other_panel # <-- Create a reference to other panel
        self.SetBackgroundColour("blue")
        button1 = wx.Button(self, label="change the text")
        self.Bind(wx.EVT_BUTTON, self.OnChange, id=button1.GetId())

    def OnChange(self, event):
        value = str(self.other_panel.text.GetLabel())  # <-- Use other panel to set text
        value = "this works"
        self.other_panel.text.SetLabel(str(value))


class OtherPanel(wx.Panel):

    def __init__(self, parent):
        wx.Panel.__init__(self, parent)
        self.SetBackgroundColour("white")
        self.text = wx.StaticText(self, -1, 'try to change this text', (40, 60))

class GridPanel(wx.Panel):

    def __init__(self, parent):
        wx.Panel.__init__(self, parent)
        self.grid = gridlib.Grid(self, style=wx.BORDER_SUNKEN)
        self.grid.CreateGrid(20,8)
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.grid, 1, wx.EXPAND)
        self.SetSizer(sizer)


class MainPanel(wx.Panel):

    def __init__(self, parent):
        wx.Panel.__init__(self, parent)
        notebook = wx.Notebook(self)
        page = wx.SplitterWindow(notebook)
        notebook.AddPage(page, "Splitter")
        hSplitter = wx.SplitterWindow(page)
        panelOne = OtherPanel(hSplitter)
        panelTwo = GridPanel(hSplitter)
        hSplitter.SplitVertically(panelOne, panelTwo)
        hSplitter.SetSashGravity(0.5)
        panelThree = RegularPanel(page, panelOne)  # <-- Pass in other panel reference
        page.SplitHorizontally(hSplitter, panelThree)
        page.SetSashGravity(0.5)
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(notebook, 1, wx.EXPAND)
        self.SetSizer(sizer)


class MainFrame(wx.Frame):

    def __init__(self):

        wx.Frame.__init__(self, None, title="Nested Splitters",
                          size=(800,600))
        self.panel = MainPanel(self)
        self.Show()

if __name__ == "__main__":
    app = wx.App(False)
    frame = MainFrame()
    app.MainLoop()

你也可以使用PubSub 来做这种事情。如果您对这种方法感兴趣，可以查看以下链接：

• https://wxpython.org/Phoenix/docs/html/wx.lib.pubsub.html
• https://www.blog.pythonlibrary.org/2013/09/05/wxpython-2-9-and-the-newer-pubsub-api-a-simple-tutorial/