scrollToTop在带有RadioBox的ScrollPanel中无法正常工作

Question

我遇到了wxPython滚动面板的问题，其中包含一个radiobox。当从另一个面板更改焦点时，当尝试从radiobox中选择一个项目时，滚动条会跳到顶部。然后，您需要滚动并再次单击。一个重现问题的最小例子：

#!/bin/env python
import wx
import wx.lib.scrolledpanel as SP

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, - 1, "Frame", size=(300, 300))
        self.scrolledPanel = ScrollPanel(self, size=(-1, 200))
        self.panel = PlotTypePanel(self)
        hbox = wx.BoxSizer(wx.VERTICAL)
        hbox.Add(self.scrolledPanel, 0, wx.EXPAND | wx.ALL, 0)
        hbox.Add(self.panel, 1, wx.EXPAND | wx.ALL, 0)
        self.SetSizer(hbox)

class PlotTypePanel(wx.Panel):
    def __init__(self, parent, **kwargs):
        wx.Panel.__init__(self, parent,**kwargs)
        self.anotherradiobox =  wx.RadioBox(self,label='other',    
                                    style=wx.RA_SPECIFY_COLS,
                                    choices=["some", "other", "box"])

class ScrollPanel(SP.ScrolledPanel):
    def __init__(self, parent, **kwargs):
        SP.ScrolledPanel.__init__(self, parent, -1, **kwargs)
        self.parent = parent
        self.SetupScrolling(scroll_x=False, scroll_y=True, scrollToTop=False)
        choices = [l for l in "abcdefghijklmnopqrstuv"]
        self.fieldradiobox = wx.RadioBox(self,label='letters',    
                                    style=wx.RA_SPECIFY_ROWS,
                                    choices=choices)
        vbox = wx.BoxSizer(wx.VERTICAL)
        vbox.Add(self.fieldradiobox, 0, wx.EXPAND|wx.ALL, 10)
        self.SetSizer(vbox)
        self.SetupScrolling(scroll_x=False, scrollToTop=False)

if __name__ == '__main__':
    app = wx.App()
    frame = MyFrame()
    frame.Show(True)
    app.MainLoop() 

当我点击其他电台面板并返回滚动面板时，如此处

它跳到顶部并且不选择单选按钮。我已经检查过，似乎第一次点击没有触发EVT_COMBOBOX。我也尝试添加scrollToTop=False但没有帮助。我正在使用Python 2.7.3和wxPython版本3.0.2.0。

Answer 1

OnChildFocus（self，evt）
如果获得焦点的子窗口不完全可见，则此处理程序将尝试滚动足以查看它。

参数：evt - 要处理的ChildFocusEvent事件。

显然它适用于这种情况，至少在Linux上是

#!/bin/env python
import wx
import wx.lib.scrolledpanel as SP

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, - 1, "Frame", size=(300, 300))
        self.scrolledPanel = ScrollPanel(self, size=(-1, 200))
        self.panel = PlotTypePanel(self)
        hbox = wx.BoxSizer(wx.VERTICAL)
        hbox.Add(self.scrolledPanel, 0, wx.EXPAND | wx.ALL, 0)
        hbox.Add(self.panel, 1, wx.EXPAND | wx.ALL, 0)
        self.SetSizer(hbox)

class PlotTypePanel(wx.Panel):
    def __init__(self, parent, **kwargs):
        wx.Panel.__init__(self, parent,**kwargs)
        self.anotherradiobox =  wx.RadioBox(self,label='other',
                                    style=wx.RA_SPECIFY_COLS,
                                    choices=["some", "other", "box"])

class ScrollPanel(SP.ScrolledPanel):
    def __init__(self, parent, **kwargs):
        SP.ScrolledPanel.__init__(self, parent, -1, **kwargs)
        self.parent = parent
        self.SetupScrolling(scroll_x=False, scroll_y=True, scrollToTop=False)
        choices = [l for l in "abcdefghijklmnopqrstuv"]
        self.fieldradiobox = wx.RadioBox(self,label='letters',
                                    style=wx.RA_SPECIFY_ROWS,
                                    choices=choices)
        vbox = wx.BoxSizer(wx.VERTICAL)
        vbox.Add(self.fieldradiobox, 0, wx.EXPAND|wx.ALL, 10)
        self.SetSizer(vbox)
        self.Bind(wx.EVT_CHILD_FOCUS, self.on_focus)
        self.SetupScrolling(scroll_x=False, scrollToTop=False)

    def on_focus(self,event):
        pass

if __name__ == '__main__':
    app = wx.App()
    frame = MyFrame()
    frame.Show(True)
    app.MainLoop()

注意：这不是一个问题，但你已经宣布了两次self.SetupScrolling。