wxPython/demo/XmlResourceSubclass.py

   1
   2 import  wx
   3 import  wx.xrc  as  xrc
   4
   5 #----------------------------------------------------------------------
   6
   7 resourceText = r'''<?xml version="1.0"?>
   8 <resource>
   9
  10 <!-- Notice that the class IS a standard wx class, and a custom
  11      subclass is specified as "moduleName.ClassName"  Try changing
  12      the classname to one that does not exist and see what happens -->
  13
  14 <object class="wxPanel" subclass="XmlResourceSubclass.MyCustomPanel" name="MyPanel">
  15     <size>200,100</size>
  16     <object class="wxStaticText" name="label1">
  17         <label>This panel is a custom class derived from wx.Panel,\nand is loaded by a custom XmlResourceHandler.</label>
  18         <pos>10,10</pos>
  19     </object>
  20 </object>
  21 </resource>
  22 '''
  23
  24 #----------------------------------------------------------------------
  25
  26 class MyCustomPanel(wx.Panel):
  27     def __init__(self):
  28         p = wx.PrePanel()
  29         # the Create step is done by XRC.
  30         self.PostCreate(p)
  31         self.Bind(wx.EVT_WINDOW_CREATE, self.OnCreate)
  32         self.Bind(wx.EVT_SIZE, self.OnSize)
  33
  34
  35     def OnCreate(self, evt):
  36         # This is the little bit of customization that we do for this
  37         # silly example.  It could just as easily have been done in
  38         # the resource.  We do it in the EVT_WINDOW_CREATE handler
  39         # because the window doesn't really exist yet in the __init__.
  40         if self is evt.GetEventObject():
  41             t = wx.StaticText(self, -1, "MyCustomPanel")
  42             f = t.GetFont()
  43             f.SetWeight(wx.BOLD)
  44             f.SetPointSize(f.GetPointSize()+2)
  45             t.SetFont(f)
  46             self.t = t
  47             # On OSX the EVT_SIZE happens before EVT_WINDOW_CREATE !?!
  48             # so give it another kick
  49             wx.CallAfter(self.OnSize, None)
  50         evt.Skip()
  51
  52     def OnSize(self, evt):
  53         if hasattr(self, 't'):
  54             sz = self.GetSize()
  55             w, h = self.t.GetTextExtent(self.t.GetLabel())
  56             self.t.SetPosition(((sz.width-w)/2, (sz.height-h)/2))
  57
  58 #----------------------------------------------------------------------
  59
  60
  61 class TestPanel(wx.Panel):
  62     def __init__(self, parent, log):
  63         self.log = log
  64         wx.Panel.__init__(self, parent, -1)
  65
  66         # make the components
  67         label = wx.StaticText(self, -1, "The lower panel was built from this XML:")
  68         label.SetFont(wx.Font(12, wx.SWISS, wx.NORMAL, wx.BOLD))
  69
  70         text = wx.TextCtrl(self, -1, resourceText,
  71                           style=wx.TE_READONLY|wx.TE_MULTILINE)
  72         text.SetInsertionPoint(0)
  73
  74         line = wx.StaticLine(self, -1)
  75
  76         # Load the resource
  77         res = xrc.EmptyXmlResource()
  78         res.LoadFromString(resourceText)
  79
  80         # Now create a panel from the resource data
  81         panel = res.LoadPanel(self, "MyPanel")
  82
  83         # and do the layout
  84         sizer = wx.BoxSizer(wx.VERTICAL)
  85         sizer.Add(label, 0, wx.EXPAND|wx.TOP|wx.LEFT, 5)
  86         sizer.Add(text, 1, wx.EXPAND|wx.ALL, 5)
  87         sizer.Add(line, 0, wx.EXPAND)
  88         sizer.Add(panel, 1, wx.EXPAND|wx.ALL, 5)
  89
  90         self.SetSizer(sizer)
  91         self.SetAutoLayout(True)
  92
  93
  94 #----------------------------------------------------------------------
  95
  96 def runTest(frame, nb, log):
  97     win = TestPanel(nb, log)
  98     return win
  99
 100 #----------------------------------------------------------------------
 101
 102
 103
 104 overview = """<html><body>
 105 <h2><center>wx.XmlResourceSubclass</center></h2>
 106
 107 Sometimes it is necessary to use custom classes, but you still want
 108 them to be created from XRC.  The subclass XRC attribute allows you to
 109 do that.
 110
 111 </body></html>
 112 """
 113
 114
 115
 116 if __name__ == '__main__':
 117     import sys,os
 118     import run
 119     run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
 120