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POArranging that a wxpython window inherits its size sensibly from its contents
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copied!<p>I've written my first wxpython application and it works fine, but I ran into difficulties properly sizing the main window. The panel contains a <code>wx.BoxSizer</code> that, in turn, contains a <code>wx.FlexGridSizer</code> that, in turn, contains 6 <code>wx.TextCtrl</code>s.</p> <p>The tutorials I have read seemed to focus on setting sizes manually. What I would really like to do is to have the <code>TextCtrl</code>s work out what size they should be to contain 3 characters from a given font (say "WWW") and that, in turn, should automatically determine the size of the FlexGridSizer and the main window. I don't need to worry about resizing the layout (so maybe the Sizer isn't necessary?), I just want the sizes to be determined automatically and not by me putting magic constants into the program.</p> <pre><code>import wx from names_as_vs import name_sum, name_mult NAME_SIZE = 35 class MyForm(wx.Frame): def __init__(self, parent,title): wx.Frame.__init__(self,parent,title=title,size=(405,200)) self.default_init_UI() self.init_UI() self.Show() def default_init_UI(self): """Do all the standard UI stuff""" file_menu = wx.Menu() menuAbout = file_menu.Append(wx.ID_ABOUT,"About\tCtrl-A") menuExit = file_menu.Append(wx.ID_EXIT,"Quit\tCtrl-Q") menu_bar = wx.MenuBar() menu_bar.Append(file_menu,"File") self.SetMenuBar(menu_bar) self.Bind(wx.EVT_MENU, self.OnAbout, menuAbout) self.Bind(wx.EVT_MENU, self.OnExit, menuExit) def init_UI(self): """Particular UI setup for this program""" hbox = wx.BoxSizer(wx.HORIZONTAL) panel = wx.Panel(self) fgs = wx.FlexGridSizer(2,5,9,9) fixed_elts_args = {"size":(30,70)} plus = wx.StaticText(panel, label="+", **fixed_elts_args) times = wx.StaticText(panel, label=".",**fixed_elts_args) equals1 = wx.Button(panel, label="=", **fixed_elts_args) equals2 = wx.Button(panel, label="=", **fixed_elts_args) equals1.Bind(wx.EVT_BUTTON, self.compute_sum) equals2.Bind(wx.EVT_BUTTON, self.compute_mult) font = wx.Font(48,wx.ROMAN,wx.NORMAL,wx.NORMAL) text_ctrl_args = {"size":(95,70)} self.summand1 = wx.TextCtrl(panel, **text_ctrl_args) self.summand2 = wx.TextCtrl(panel, **text_ctrl_args) self.scalar = wx.TextCtrl(panel, **text_ctrl_args) self.multiplicand = wx.TextCtrl(panel, **text_ctrl_args) self.sum_result = wx.TextCtrl(panel, style = wx.TE_READONLY, **text_ctrl_args) self.mult_result = wx.TextCtrl(panel, style = wx.TE_READONLY, **text_ctrl_args) for ctrl in (plus,times,equals1,equals2,self.summand1,self.summand2, self.scalar,self.multiplicand,self.sum_result,self.mult_result): ctrl.SetFont(font) fgs.AddMany([ self.summand1,plus,self.summand2,equals1,self.sum_result, self.scalar,times,self.multiplicand,equals2,self.mult_result ]) hbox.Add(fgs, proportion=1, flag= wx.ALL, border=15) panel.SetSizer(hbox) def OnAbout(self,e): dlg = wx.MessageDialog(self, "A GUI implementation of 815 as a vector space", "About 815 as a vector space", wx.OK) dlg.ShowModal() # Shows it dlg.Destroy() # finally destroy it when finished. def OnExit(self,e): self.Close(True) # Close the frame. def compute_sum(self,e): """Computes the sum of the names in summand1 and summand2 and displays the result in self.sum_result""" n1 = self.summand1.GetValue() n2 = self.summand2.GetValue() self.sum_result.SetValue(name_sum(n1,n2)) def compute_mult(self,e): """ Computes the scalar multiple of the name in multiplicand by the scalar in scalar and displays the result in self.mult_result """ n = self.multiplicand.GetValue() lamb = self.scalar.GetValue() self.mult_result.SetValue(name_mult(lamb,n)) </code></pre>

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