python - 包装 staticText 的 wxPython 问题

Question

下面发布了代码的简化版本(删除了空格、注释等以减小大小——但我的程序的一般格式保持大致相同)。

当我运行脚本时，静态文本正确换行，但面板中的其他项目没有向下移动(它们就像静态文本只有一行，因此并不是所有内容都可见)。

如果我手动调整窗口/框架的大小，即使只是很小的一部分，所有内容都会得到纠正，并按应有的方式显示。

为什么一开始显示不正确？我已经尝试了 GetParent().Refresh() 或 Update() 和 GetTopLevelParent().Update() 的各种组合或刷新()。我也尝试了所有我能想到的方法，但如果不手动调整框架/窗口的大小就无法正确显示。调整大小后，它就完全按照我的要求工作了。

信息:

• window
• python 2.5.2
• wxPython 2.8.11.0 (msw-unicode)

我的代码:

#! /usr/bin/python

import wx

class StaticWrapText(wx.PyControl):
   def __init__(self, parent, id=wx.ID_ANY, label='', pos=wx.DefaultPosition,
                size=wx.DefaultSize, style=wx.NO_BORDER,
                validator=wx.DefaultValidator, name='StaticWrapText'):
      wx.PyControl.__init__(self, parent, id, pos, size, style, validator, name)
      self.statictext = wx.StaticText(self, wx.ID_ANY, label, style=style)
      self.wraplabel = label
      #self.wrap()
   def wrap(self):
      self.Freeze()
      self.statictext.SetLabel(self.wraplabel)
      self.statictext.Wrap(self.GetSize().width)
      self.Thaw()
   def DoGetBestSize(self):
      self.wrap()
      #print self.statictext.GetSize()
      self.SetSize(self.statictext.GetSize())
      return self.GetSize()

class TestPanel(wx.Panel):
   def __init__(self, *args, **kwargs):
      # Init the base class
      wx.Panel.__init__(self, *args, **kwargs)
      self.createControls()
   def createControls(self):
      # --- Panel2 -------------------------------------------------------------
      self.Panel2 = wx.Panel(self, -1)
      msg1 =  'Below is a List of Files to be Processed'
      staticBox      = wx.StaticBox(self.Panel2, label=msg1)
      Panel2_box1_v1 = wx.StaticBoxSizer(staticBox, wx.VERTICAL)
      Panel2_box2_h1 = wx.BoxSizer(wx.HORIZONTAL)
      Panel2_box3_v1 = wx.BoxSizer(wx.VERTICAL)

      self.wxL_Inputs = wx.ListBox(self.Panel2, wx.ID_ANY, style=wx.LB_EXTENDED)

      sz = dict(size=(120,-1))
      wxB_AddFile    = wx.Button(self.Panel2, label='Add File',        **sz)
      wxB_DeleteFile = wx.Button(self.Panel2, label='Delete Selected', **sz)
      wxB_ClearFiles = wx.Button(self.Panel2, label='Clear All',       **sz)
      Panel2_box3_v1.Add(wxB_AddFile,    0, wx.TOP, 0)
      Panel2_box3_v1.Add(wxB_DeleteFile, 0, wx.TOP, 0)
      Panel2_box3_v1.Add(wxB_ClearFiles, 0, wx.TOP, 0)

      Panel2_box2_h1.Add(self.wxL_Inputs, 1, wx.ALL|wx.EXPAND, 2)
      Panel2_box2_h1.Add(Panel2_box3_v1,  0, wx.ALL|wx.EXPAND, 2)

      msg =  'This is a long line of text used to test the autowrapping '
      msg += 'static text message.  '
      msg += 'This is a long line of text used to test the autowrapping '
      msg += 'static text message.  '
      msg += 'This is a long line of text used to test the autowrapping '
      msg += 'static text message.  '
      msg += 'This is a long line of text used to test the autowrapping '
      msg += 'static text message.  '
      staticMsg = StaticWrapText(self.Panel2, label=msg)

      Panel2_box1_v1.Add(staticMsg,      0, wx.ALL|wx.EXPAND, 2)
      Panel2_box1_v1.Add(Panel2_box2_h1, 1, wx.ALL|wx.EXPAND, 0)
      self.Panel2.SetSizer(Panel2_box1_v1)

      # --- Combine Everything -------------------------------------------------
      final_vbox = wx.BoxSizer(wx.VERTICAL)
      final_vbox.Add(self.Panel2, 1, wx.ALL|wx.EXPAND, 2)
      self.SetSizerAndFit(final_vbox)

class TestFrame(wx.Frame):
   def __init__(self, *args, **kwargs):
      # Init the base class
      wx.Frame.__init__(self, *args, **kwargs)
      panel = TestPanel(self)
      self.SetClientSize(wx.Size(500,500))
      self.Center()

class wxFileCleanupApp(wx.App):
   def __init__(self, *args, **kwargs):
      # Init the base class
      wx.App.__init__(self, *args, **kwargs)
   def OnInit(self):
      # Create the frame, center it, and show it
      frame = TestFrame(None, title='Test Frame')
      frame.Show()
      return True

if __name__ == '__main__':
   app = wxFileCleanupApp()
   app.MainLoop()

Answer 1

使用 Mike Driscoll 的代码作为基准，我希望这能说明我的问题。使用“txt”有两种不同的版本。以下是我希望您尝试的三件事:

1. 按原样运行。用我的 StaticWrapText。一开始它显示错误，但重新调整窗口大小，它完全按照我的意愿工作。 “按钮”之前的文本下方没有空白/浪费的空间

2. 更改这两行(更改注释):
   txt = wx.StaticText(panel, label=text)
   #txt = StaticWrapText(面板，标签=文本)
   现在你会看到没有换行，文本总是只有一行。绝对不是我们想要的。这是因为“sizer.Add(txt, 0, wx.EXPAND, 5)”……所以继续第 3 部分……

3. 保留第 2 部分的更改并更改:
   sizer.Add(txt, 0, wx.EXPAND, 5)
   至:
   sizer.Add(txt, 1, wx.EXPAND, 5)
   所以现在静态文本将展开。这接近于工作......但我不想在文本和按钮之间浪费所有空间。如果你把 window 做得很大，就会浪费很多空间。请在调整窗口大小后查看第 1 部分以查看差异。

代码:

import wx

class StaticWrapText(wx.PyControl):
   def __init__(self, parent, id=wx.ID_ANY, label='', pos=wx.DefaultPosition,
                size=wx.DefaultSize, style=wx.NO_BORDER,
                validator=wx.DefaultValidator, name='StaticWrapText'):
      wx.PyControl.__init__(self, parent, id, pos, size, style, validator, name)
      self.statictext = wx.StaticText(self, wx.ID_ANY, label, style=style)
      self.wraplabel = label
      #self.wrap()
   def wrap(self):
      self.Freeze()
      self.statictext.SetLabel(self.wraplabel)
      self.statictext.Wrap(self.GetSize().width)
      self.Thaw()
   def DoGetBestSize(self):
      self.wrap()
      #print self.statictext.GetSize()
      self.SetSize(self.statictext.GetSize())
      return self.GetSize()

class MyForm(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, "Tutorial")

        # Add a panel so it looks the correct on all platforms
        panel = wx.Panel(self, wx.ID_ANY)

        text = "I'm subclasses the statictext because I want it to act exactly like a static text, but correctly wordwrap as needed. I've found several examples of it on the web, but none that worked how I wanted. The wordwrap makes it look much nicer when the user may decide to re-size the window, so I would definitely like to have it be wordwrapped. I know about the wx.lib.wordwrap, but chose to use the built in Wrap function of the statictext control instead. It basically does the same thing from what I understand."
        #txt = wx.StaticText(panel, label=text)
        txt = StaticWrapText(panel, label=text)
        wxbutton = wx.Button(panel, label='Button', size=wx.Size(120,50))
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(txt,      0, wx.EXPAND, 5)
        sizer.Add(wxbutton, 1, wx.EXPAND, 5)
        panel.SetSizer(sizer)

# Run the program
if __name__ == "__main__":
    app = wx.PySimpleApp()
    frame = MyForm().Show()
    app.MainLoop()

编辑:

啊啊……终于!我尝试在程序的几乎每个级别上使用 Layout() 方法，但实际上我需要在通过方法 GetSizer() 找到的 SIZER 上使用 Layout() - 或者您可以将 SendSizeEvent() 发送到面板(评论在下面的代码中)。因此，以下内容现在完全符合我的要求!谢谢您的帮助。唯一的其他变化是将带有 self.panel 的面板存储在框架类中。请注意，我必须将此语句放在 frame.Show() 之后，否则它无法正常工作。

代码:

import wx

class StaticWrapText(wx.PyControl):
   def __init__(self, parent, id=wx.ID_ANY, label='', pos=wx.DefaultPosition,
                size=wx.DefaultSize, style=wx.NO_BORDER,
                validator=wx.DefaultValidator, name='StaticWrapText'):
      wx.PyControl.__init__(self, parent, id, pos, size, style, validator, name)
      self.statictext = wx.StaticText(self, wx.ID_ANY, label, style=style)
      self.wraplabel = label
      #self.wrap()
   def wrap(self):
      self.Freeze()
      self.statictext.SetLabel(self.wraplabel)
      self.statictext.Wrap(self.GetSize().width)
      self.Thaw()
   def DoGetBestSize(self):
      self.wrap()
      #print self.statictext.GetSize()
      self.SetSize(self.statictext.GetSize())
      return self.GetSize()

class MyForm(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, "Tutorial")

        # Add a panel so it looks the correct on all platforms
        self.panel = wx.Panel(self, wx.ID_ANY)

        text = "I'm subclasses the statictext because I want it to act exactly like a static text, but correctly wordwrap as needed. I've found several examples of it on the web, but none that worked how I wanted. The wordwrap makes it look much nicer when the user may decide to re-size the window, so I would definitely like to have it be wordwrapped. I know about the wx.lib.wordwrap, but chose to use the built in Wrap function of the statictext control instead. It basically does the same thing from what I understand."
        txt = StaticWrapText(self.panel, label=text)
        wxbutton = wx.Button(self.panel, label='Button', size=wx.Size(120,50))
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(txt,      0, wx.EXPAND, 5)
        sizer.Add(wxbutton, 1, wx.EXPAND, 5)
        self.panel.SetSizer(sizer)

# Run the program
if __name__ == "__main__":
    app = wx.PySimpleApp()
    frame = MyForm()
    frame.Show()
    #frame.panel.SendSizeEvent()
    frame.panel.GetSizer().Layout()
    app.MainLoop()

作为最后的说明，在我发布的原始程序中，需要在 frame.Show() 之前或之后添加以下行:
frame.panel.Panel2.GetSizer().Layout()

有趣的是……对于那个原始示例，这可以在 frame.Show() 之前或之后，但另一个示例要求它在 frame.Show() 之后。我不确定为什么，但只要把它放在后面就安全了。