调整 wxPython wx.Panel 的大小？

Question

我正在尝试在表单上放置一个图像面板，这样当单击按钮时，程序启动时放在面板上的 64x64 图像将被替换为更大的 320x224 图像 - 像素大小并不那么重要。尺寸不同。我几乎明白了 - 现在图像都加载了，并且在单击按钮时确实将第二个图像显示出来 - 不幸的是，它是第二个图像的左上角 64x64，而不是整个图像。

一定可以调整面板大小，以便可以查看整个图像，当然吗？这是我的代码：（

#First we create our form elements. This app has a label on top of a button, both below a panel with an image on it, so we create a sizer and the elements
self.v_sizer = wx.BoxSizer(wx.VERTICAL)
self.imagePanel = wx.Panel(self, -1)
self.FileDescriptionText = wx.StaticText(self, label="No file loaded")
self.openFileDialog = wx.Button(self, label="Load a file", size=(320,40))
#Bind the button click to our press function
self.openFileDialog.Bind(wx.EVT_BUTTON, self.onOpenFileDialog)

#That done, we need to construct the form. First, put the panel, button and label in the vertical sizer...
self.v_sizer.Add(self.imagePanel, 0, flag=wx.ALIGN_CENTER)
self.v_sizer.Add(self.openFileDialog, 0, flag=wx.ALIGN_CENTER)
self.v_sizer.Add(self.ROMDescriptionText, 0, flag=wx.ALIGN_CENTER)
#then assign an image for the panel to have by default, and apply it
self.imageToLoad = wx.Image("imgs/none_loaded.png", wx.BITMAP_TYPE_ANY).ConvertToBitmap()
self.imageCtrl = wx.StaticBitmap(self.imagePanel, -1, self.imageToLoad, (0, 0), (self.imageToLoad.GetWidth(), self.imageToLoad.GetHeight()))

#Set the sizer to be owned by the window
self.SetSizer(self.v_sizer)
#Set the current window size to the size of the sizer
self.v_sizer.Fit(self)
#Set the Minimum size of the window to the current size of the sizer
self.SetMinSize(self.v_sizer.GetMinSize())


def onOpenFileDialog(self, event):
    img = wx.Image("imgs/title.png", wx.BITMAP_TYPE_ANY)
    self.imageCtrl.SetBitmap(wx.BitmapFromImage(img))
    self.imagePanel.Refresh()

它被称为 onOpenFileDialog，因为最终它将从组合框路径中选取图像。）

如何编辑 onOpenFileDialog 方法，例如它首先找到图像大小，就像在 self.imageCtrl 行中一样在初始表单元素创建中？我找不到办法做到这一点。

Answer 1

尝试在 onOpenFileDialog() 方法末尾调用 self.v_sizer.Fit(self)