python - wxpython:我将如何配置一个 box sizer 以便它有一个中心列在调整大小时移动，但不会改变尺寸(里面的图片解释)

Question

我不知道如何嵌套我的 sizer 以便我得到以下行为。

当用户调整窗口大小时，我希望所有小部件的配置保持不变，但让包含所有内容的中央列保持居中。

Answer 1

使用 box sizer，您应该相应地调整比例。侧面的垫片应填充剩余空间，而中间部分应有固定的空间。查看documentation of wx.BoxSizer :

It is the unique feature of a box sizer, that it can grow in both directions (height and width) but can distribute its growth in the main direction (horizontal for a row) unevenly among its children. This is determined by the proportion parameter give to items when they are added to the sizer. It is interpreted as a weight factor, i.e. it can be zero, indicating that the window may not be resized at all, or above zero. If several windows have a value above zero, the value is interpreted relative to the sum of all weight factors of the sizer, so when adding two windows with a value of 1, they will both get resized equally and each will receive half of the available space after the fixed size items have been sized.

另请参阅这个小示例代码(使用 wxFormBuilder 生成)。我已经强调，间隔符的比例为 1，而应用程序的比例为 0。

class MyFrame1 (wx.Frame):
    def __init__(self):
        super(MyFrame1, self).__init__()

        fluid_sizer = wx.BoxSizer(wx.HORIZONTAL)
        fluid_sizer.AddSpacer((0, 0), 1, wx.EXPAND, 5)
        #                             ^--- proportion = 1

        self.fixed_panel = wx.Panel(self, wx.ID_ANY, wx.DefaultPosition, wx.Size(-1,-1), wx.TAB_TRAVERSAL)
        self.fixed_panel.SetBackgroundColour(wx.SystemSettings.GetColour(wx.SYS_COLOUR_HIGHLIGHT))
        fixed_sizer = wx.BoxSizer(wx.VERTICAL)
        fixed_sizer.SetMinSize(wx.Size(150,-1)) 
        self.m_button1 = wx.Button(self.fixed_panel, wx.ID_ANY, u"MyButton", wx.DefaultPosition, wx.DefaultSize, 0)
        fixed_sizer.Add(self.m_button1, 0, wx.ALL, 5)
        self.fixed_panel.SetSizer(fixed_sizer)
        self.fixed_panel.Layout()
        fixed_sizer.Fit(self.fixed_panel)

        fluid_sizer.Add(self.fixed_panel, 0, wx.EXPAND |wx.ALL, 5)
        #                                 ^--- proportion = 0


        fluid_sizer.AddSpacer((0, 0), 1, wx.EXPAND, 5)
        #                             ^--- proportion = 1

        self.SetSizer(fluid_sizer)
        self.Layout()