On Fri, 2008-05-09 at 09:29 -0300, David Anderson wrote:
>          1: How to put a Sizer exactly in the Middle of the panel? Even
>          if the screen is resized?

Here's what I do to center a button across the bottom of a dialog

        sizer = wx.BoxSizer(wx.HORIZONTAL)
        sizer.Add((1,1), 1)
        btn = wx.Button(pnl,id=wx.ID_PRINT)
        sizer.Add(btn, 0, wx.EXPAND)
        sizer.Add((1,1), 1)

With this layout, the widget (button) stays the same size if the panel
is resized, the space is adjusted evenly on either side.

To center vertically, you could use a similar technique with a vertical
BoxSizer and add sizer from above to the center slot




>          4: How to change panels in the same frame?
>          For example: I'm on Panel A, then I clik on the menu which
>          changes to Panel B, Also in each panel would have a
>          Forward/Backward button, that will go to the previous Panel,
>          or the post Panel, Just as Web Browsers forward/backward

What I would do is make Panels A and B children of another panel. I
would then hide all but the panel of interest and show that. Here's some
code. self.data_window is the parent panel. The panel parameter is the
panel I want displayed.

    def replace_panel(self, panel):
        self.data_window.Freeze()
        try:
            for i in self.data_window.GetChildren():
                i.Hide()
            panel.Show()
            panel.Fit()
            self.data_window.Layout()
        finally:
            self.data_window.Thaw()

Mark


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