Wxpython面板被裁剪，左上角只显示了一个小方框

Question

我使用wx中的Hide((和Show((来实现"下一页"效果，方法是隐藏一个面板并在同一帧中显示下一个面板(但不太确定我是否正确(。在某些页面上，面板只是左上角的一个小裁剪版本，而其他一些面板可以正常工作(显示全部内容(。我该如何解决这个问题？

我在stackoverflow上看到了一些关于面板或框架的子级/父级的内容，并尝试更改代码，但它不起作用，不太确定如何正确执行。

class MyPanel(wx.Panel):
def __init__(self, parent):
#Constructor
wx.Panel.__init__(self, parent=parent)
#self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)
#This is for older versions of wx
self.frame = parent
self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
self.Layout()
def OnEraseBackground(self, evt):
#Add background pic
#From ColourDB.py
dc = evt.GetDC()
if not dc:
dc = wx.ClientDC(self)
rect = self.GetUpdateRegion().GetBox()
dc.SetClippingRect(rect)
dc.Clear()
bmp = wx.Bitmap("RszHive.jpg")
dc.DrawBitmap(bmp, 0, 0)
class StartPage(wx.Frame):
def __init__(self, current_dt):
#Settings for frame
super().__init__(parent=None, title='Test', size=(850,790))
#setting up main panel (home page)
self.panel = MyPanel(self)
self.current_dt = current_dt
#so that frame will be in the center of the screen
self.Center()
self.vert_sizer = wx.BoxSizer(wx.VERTICAL)
from Database import DataBase, OperatingHours, GetDayTime, GetMenuByDayTime
dDataBase = DataBase("Full_Menu_Database.txt")
dOperatingHours = OperatingHours("Operating Hours.txt")
# Convert to a tuple needed for the functions
tDayTime = GetDayTime(self.get_dt())
# Function to get menu dictionary by date and time
# Will return an empty dictionary if no food/stores are available
self.stores_open = GetMenuByDayTime(dDataBase, dOperatingHours, tDayTime)
if self.stores_open == {}:
self.ophours = wx.StaticText(self.panel, -1, style=wx.ALIGN_CENTER)
self.ophours.SetLabel("Test")
self.ophours_font = wx.Font(19, wx.TELETYPE, wx.NORMAL, wx.NORMAL)
self.ophours.SetFont(self.ophours_font)
self.vert_sizer.Add(self.ophours, 0, wx.ALL | wx.CENTER, 10)
else:
self.store_names, self.stores_ = [], []
for onestorename in self.stores_open.keys():
self.store_names.append(onestorename)
self.stores_.append(self.stores_open[onestorename])
#btn for store1
store_btn1 = wx.Button(self.panel, label= self.store_names[0])
store_btn1.Bind(wx.EVT_BUTTON, self.click_store1)
self.vert_sizer.Add(store_btn1, 0, wx.ALL | wx.CENTER, 5)
#btn for store2 if have
if len(self.store_names) > 1:
store_btn2 = wx.Button(self.panel, label=self.store_names[1])
store_btn2.Bind(wx.EVT_BUTTON, self.click_store2)
self.vert_sizer.Add(store_btn2, 0, wx.ALL | wx.CENTER, 5)
# btn for store3 if have
if len(self.store_names) > 2:
store_btn3 = wx.Button(self.panel, label=self.store_names[2])
store_btn3.Bind(wx.EVT_BUTTON, self.click_store3)
self.vert_sizer.Add(store_btn3, 0, wx.ALL | wx.CENTER, 5)
# btn for store4 if have
if len(self.store_names) > 3:
store_btn4 = wx.Button(self.panel, label=self.store_names[3])
store_btn4.Bind(wx.EVT_BUTTON, self.click_store4)
self.vert_sizer.Add(store_btn4, 0, wx.ALL | wx.CENTER, 5)
# btn for store5 if have
if len(self.store_names) > 4:
store_btn5 = wx.Button(self.panel, label=self.store_names[4])
store_btn5.Bind(wx.EVT_BUTTON, self.click_store5)
self.vert_sizer.Add(store_btn5, 0, wx.ALL | wx.CENTER, 5)
self.SetSizer(self.vert_sizer)
self.Layout()
self.Show()

当我运行代码时，面板的外观图片

Answer 1

@igor是正确的，调用Layout将完成任务
以下是一个示例：单击显示的面板以切换到另一个面板。

import wx
class MyPanel(wx.Panel):
def __init__(self, parent):
super().__init__(parent)
self.parent = parent
self.panel = wx.Panel(self)
self.btn = wx.Button(self.panel, label="Panel 1", size=(250,75))
self.btn.Bind(wx.EVT_BUTTON, self.switch)
vbox1 = wx.BoxSizer(wx.VERTICAL)
vbox1.Add(self.btn)
self.panel.SetSizer(vbox1)
vbox = wx.BoxSizer(wx.VERTICAL)
vbox.Add(self.panel)
self.SetSizer(vbox)
self.Show()
def switch(self, event):
self.parent.Swap()
class MyOtherPanel(wx.Panel):
def __init__(self, parent):
super().__init__(parent)
self.parent = parent
self.panel = wx.Panel(self)
self.btn = wx.Button(self.panel, label="Panel 2", size=(175,250))
self.btn.Bind(wx.EVT_BUTTON, self.switch)
vbox1 = wx.BoxSizer(wx.VERTICAL)
vbox1.Add(self.btn)
self.panel.SetSizer(vbox1)
vbox = wx.BoxSizer(wx.VERTICAL)
vbox.Add(self.panel)
self.SetSizer(vbox)
self.Show()
self.panel.Hide()
def switch(self, event):
self.parent.Swap()
class PanelSwitcher(wx.Frame):
def __init__(self):
super().__init__(None)
vbox = wx.BoxSizer(wx.VERTICAL)
self.panel1 = MyPanel(self)
self.panel2 = MyOtherPanel(self)
vbox.Add(self.panel1)
vbox.Add(self.panel2)
self.SetSizer(vbox)
self.Show()
def Swap(self):
if self.panel1.panel.IsShown():
self.panel1.panel.Hide()
self.panel2.panel.Show()
else:
self.panel2.panel.Hide()
self.panel1.panel.Show()
self.Layout()

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

Answer 2

我也有这个问题很长时间了，不知道解决方案。分级机无法正常工作(正如我所料(

对我来说，问题是面板没有(或尺寸不正确(。解决方案是：

panel.Fit()或panel.SetSize(x,y)

另一种可能性是，首先将面板添加到尺寸确定器中。然后将它们设置到框架中。然后将按钮放入sizer中，并将它们添加到面板中。这也解决了面板尺寸不正确的问题。