Для прокрутки по горизонтали вы должны навести указатель мыши на горизонтальную полосу прокрутки, а затем вращать колесико мыши.
import wx
import wx.lib.scrolledpanel as scrolled
class TestPanel(scrolled.ScrolledPanel):
def __init__(self, parent):
scrolled.ScrolledPanel.__init__(self, parent, -1)
vbox = wx.BoxSizer(wx.VERTICAL)
desc1 = wx.StaticText(self, -1, "1. These lines are really quite long and should not fit in the window requiring you to use the horizontal scroll bar or position the mouse over the scroll bar and spin the wheel\n\n")
desc2 = wx.StaticText(self, -1, "2. These lines are really quite long and should not fit in the window requiring you to use the horizontal scroll bar or position the mouse over the scroll bar and spin the wheel\n\n")
desc3 = wx.StaticText(self, -1, "3. These lines are really quite long and should not fit in the window requiring you to use the horizontal scroll bar or position the mouse over the scroll bar and spin the wheel\n\n")
desc4 = wx.StaticText(self, -1, "4. These lines are really quite long and should not fit in the window requiring you to use the horizontal scroll bar or position the mouse over the scroll bar and spin the wheel\n\n")
desc5 = wx.StaticText(self, -1, "5. These lines are really quite long and should not fit in the window requiring you to use the horizontal scroll bar or position the mouse over the scroll bar and spin the wheel\n\n")
desc6 = wx.StaticText(self, -1, "6. These lines are really quite long and should not fit in the window requiring you to use the horizontal scroll bar or position the mouse over the scroll bar and spin the wheel\n\n")
vbox.Add(desc1, wx.NewId(), wx.ALIGN_LEFT|wx.ALL, 5)
vbox.Add(desc2, wx.NewId(), wx.ALIGN_LEFT|wx.ALL, 5)
vbox.Add(desc3, wx.NewId(), wx.ALIGN_LEFT|wx.ALL, 5)
vbox.Add(desc4, wx.NewId(), wx.ALIGN_LEFT|wx.ALL, 5)
vbox.Add(desc5, wx.NewId(), wx.ALIGN_LEFT|wx.ALL, 5)
vbox.Add(desc6, wx.NewId(), wx.ALIGN_LEFT|wx.ALL, 5)
self.SetSizer(vbox)
self.SetAutoLayout(1)
self.SetupScrolling(scroll_x=True, scroll_y=True, rate_x=20, rate_y=20, scrollToTop=True, scrollIntoView=True)
app = wx.App(0)
frame = wx.Frame(None, wx.ID_ANY,size=(500,200))
tp = TestPanel(frame)
frame.Show()
app.MainLoop()