[wxpython-users] How to create a GUI that changes layout dynamically?

[Stef Mientki]

maybe AUI might give you a solution for your problem.
cheers,
Stef Mientki

Anton Blomberg wrote:
> Hi,
> I'm trying to create a GUI with a lot of different controls, which 
> should all be minimizeable. So that when one control minimizes the 
> other controls in the layout can resize to use the freed space.
>
> Does anyone know how to do this in wxPython, or just point me in the 
> right direction? Are there any programs that does this that I can look 
> at? Any pages in the wiki that could be useful?
> I've been looking all around.
>
> The appropriate wx-controls I found are wxFoldPanelBar and 
> wxCollapsiblePane. FoldPanelBar did minimize, but couldn't resize to 
> acquire the cleared space. CollapsiblePane worked but resized the 
> whole frame upon Collapse/Expand if not major workarounds were used.
>
> This is my last try with CollapsiblePane:
> ------------------
>
> I've created a simple GUI with two CollapsiblePanes on top of each 
> other in a vertical BoxSizer. When I minimize one pane I want all other
> panes to resize and increase height to cover the newly aquired space.
>
> I got this result with the code example below. But with that program, 
> the user can't resize the frame. It will pop back to its original, 
> hardcoded, size when a CollapsiblePane is collapsed/expanded.
> Does anyone know a way around this problem?
>
> If I don't force the frame to a specified size it will resize totally 
> and behave strange. Look at ## (1) ## and ## (2) ## in this example:
>
> import wx
>
> class MainFrame(wx.Frame):
>     def __init__(self):
>         wx.Frame.__init__(self, parent = None, size = (500,500))
>         self.frameZ = frameZ = wx.BoxSizer(wx.VERTICAL) # Create main 
> sizer
>        
>         ## (1) ## If this SetMinSize() is omitted, the frame will 
> resize totally
>         frameZ.SetMinSize((500,500)) # Lock the size of the frame
>         self.SetSizer(frameZ)
>        
>         # Create CollapsePane wrapper objects, pass frame as arg
>         cp1 = ColPaneWrapper(self)
>         cp2 = ColPaneWrapper(self)
>        
>         # Do Layout() and SetSizeHints() for main frame
>         frameZ.Layout()
>         frameZ.SetSizeHints(self)
>
> class ColPaneWrapper:
>     def __init__(self, frame):
>         self.cp = cp = wx.CollapsiblePane(frame) # Create CollapsePane 
> object, frame as parent
>         self.frameZ = frameZ = frame.frameZ # Get frame sizer
>         self.frame = frame # Get frame
>         frame.Bind(wx.EVT_COLLAPSIBLEPANE_CHANGED, self.OnCollapse, 
> cp) # Bind OnCollapse event
>        
>         cp_pane = cp.GetPane() # Get pane to use as parent for 
> controls and sizer
>         self.cpZ = cpZ = wx.BoxSizer(wx.VERTICAL) # Create CP sizer
>         cp_pane.SetSizer(cpZ) # Assign sizer to CPs pane
>        
>         button = wx.Button(cp_pane, label = 'SomePlaceholderControl') 
> # Create button, use CPs pane as parent
>         cpZ.Add(button, 1, wx.EXPAND | wx.ALL, 0) # Add button to CP sizer
>         frameZ.Add(cp, 1, wx.EXPAND | wx.ALL, 0) # Add CP to frame sizer
>        
>         # Do OnCollapse to refresh the state of the panes
>         self.OnCollapse()
>
>     def OnCollapse(self, evt = None):
>     # OnCollapse:
>     # Change the Sizer-Proportion-state of the CP to match the 
> Expanded/Collapsed state
>         if self.cp.IsCollapsed():
>             self.frameZ.GetItem(self.cp).SetProportion(0)
>         else:
>             self.frameZ.GetItem(self.cp).SetProportion(1)
>        
>         # Do Layout() for CPs sizer
>         self.cpZ.Layout()
>        
>         ## (2) ## If this SetSizeHints() is omitted, the frame will 
> resize totally.
>         self.frameZ.SetSizeHints(self.frame) # SetSizeHints for frame 
> sizer
>
> if __name__ == "__main__":
>     app = wx.App()
>     MainFrame().Show()
>     app.MainLoop()
> ------------------------------------------------------------------------
>
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