python - 如果在 wxPython 中使用了 ScrolledPanel，如何正确添加另一个面板？

Question

在我的wxPython 4.1.0应用程序中，我继承自wx.Frame，然后从中创建一个主面板wx.Panel，添加一个ScrolledPanel并添加一个wx.Bitmap作为子项。该位图/图像的高度大于滚动面板，因此显示了垂直滚动条 - 一切都符合预期。

然后我在该滚动面板下方添加另一个wx.Panel，没有任何子项，但仅此一项就使滚动面板中的滚动条消失。这是错误还是功能？

这是一个完整的示例。
取消注释代码def init_panel(self)以查看奇怪的行为：

import wx
import wx.grid
import wx.lib.intctrl
import wx.lib.scrolledpanel

class TestApp(wx.Frame):
    IMAGE_SIZE = 800
    SCROLL_SPEED = 10

    def __init__(self):
        super(TestApp, self).__init__(
            None, title="wxPython Test", style=wx.DEFAULT_FRAME_STYLE ^ wx.RESIZE_BORDER,
        )

        self.init_panel()
        self.main_panel.Layout()
        self.main_panel.Fit()
        self.Center()
        self.Show()

    def init_panel(self):
        self.main_panel = wx.Panel(self)
        self.main_sizer = wx.BoxSizer(wx.VERTICAL)
        self.main_panel.SetSizer(self.main_sizer)

        self.bitmaps_panel = wx.lib.scrolledpanel.ScrolledPanel(self.main_panel)
        self.bitmaps_panel.SetMinSize((-1, 250))
        self.bitmaps_panel.SetupScrolling(scroll_x=False, scroll_y=True, rate_y=self.SCROLL_SPEED)
        self.bitmaps_panel.SetAutoLayout(True)

        self.bitmaps_sizer = wx.BoxSizer(wx.VERTICAL)
        self.bitmaps_panel.SetSizer(self.bitmaps_sizer)

        bitmap = wx.Bitmap(wx.Image(self.IMAGE_SIZE, self.IMAGE_SIZE))
        self.bitmaps_sizer.Add(wx.StaticBitmap(self.bitmaps_panel, wx.ID_ANY, bitmap))
        self.bitmaps_sizer.Fit(self)
        self.main_sizer.Add(self.bitmaps_panel, 0, flag=wx.EXPAND)

        ## With this block commented it works, uncomment to see the scroll bar dissapear
        # self.stats_panel = wx.Panel(self)
        # self.stats_sizer = wx.BoxSizer(wx.VERTICAL)
        # self.stats_panel.SetSizer(self.stats_sizer)
        # self.main_sizer.Add(self.stats_panel, 0, flag=wx.EXPAND)

        self.main_sizer.Fit(self)

if __name__ == "__main__":
    wxapp = wx.App()
    app = TestApp()
    wxapp.MainLoop()

标签： pythonuser-interfacewxpython

Answer 1

这个怪癖可能不能用你stats_panel作为孩子的创造来解释self，而不是self.main_panel？

import wx
import wx.grid
import wx.lib.intctrl
import wx.lib.scrolledpanel

class TestApp(wx.Frame):
    IMAGE_SIZE = 800
    SCROLL_SPEED = 10

    def __init__(self):
        super(TestApp, self).__init__(
            None, title="wxPython Test", style=wx.DEFAULT_FRAME_STYLE)

        self.init_panel()
        self.main_panel.Layout()
        self.main_panel.Fit()
        self.Center()
        self.Show()

    def init_panel(self):
        self.main_panel = wx.Panel(self)

        self.bitmaps_panel = wx.lib.scrolledpanel.ScrolledPanel(self.main_panel)
        self.bitmaps_panel.SetMinSize((-1, 250))
        self.bitmaps_panel.SetupScrolling(scroll_x=True, scroll_y=True, rate_y=self.SCROLL_SPEED)
        self.bitmaps_panel.SetAutoLayout(True)

        bitmap = wx.Bitmap(wx.Image(2000, self.IMAGE_SIZE))
        self.bitmap = wx.StaticBitmap(self.bitmaps_panel, wx.ID_ANY, bitmap)

        self.stats_panel = wx.Panel(self.main_panel)
        self.stats_panel.SetBackgroundColour('lightblue')
        label = wx.StaticText(self.stats_panel, label="Stats Panel")


        self.bitmaps_sizer = wx.BoxSizer(wx.VERTICAL)
        self.bitmaps_sizer.Add(self.bitmap, 0, wx.EXPAND, 5)
        self.bitmaps_panel.SetSizer(self.bitmaps_sizer)

        self.stats_sizer = wx.BoxSizer(wx.VERTICAL)
        self.stats_sizer.Add(label)
        self.stats_panel.SetSizer(self.stats_sizer)

        self.main_sizer = wx.BoxSizer(wx.VERTICAL)
        self.main_sizer.Add(self.bitmaps_panel, 0, flag=wx.EXPAND)
        self.main_sizer.Add(self.stats_panel, 1, flag=wx.EXPAND)
        self.main_panel.SetSizer(self.main_sizer)


if __name__ == "__main__":
    wxapp = wx.App()
    app = TestApp()
    wxapp.MainLoop()