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             print w, h
  57             self.t.SetPosition(((sz.width-w)/2, (sz.height-h)/2))
  58
  59 #----------------------------------------------------------------------
  60
  61
  62 class TestPanel(wx.Panel):
  63     def __init__(self, parent, log):
  64         self.log = log
  65         wx.Panel.__init__(self, parent, -1)
  66
  67         # make the components
  68         label = wx.StaticText(self, -1, "The lower panel was built from this XML:")
  69         label.SetFont(wx.Font(12, wx.SWISS, wx.NORMAL, wx.BOLD))
  70
  71         text = wx.TextCtrl(self, -1, resourceText,
  72                           style=wx.TE_READONLY|wx.TE_MULTILINE)
  73         text.SetInsertionPoint(0)
  74
  75         line = wx.StaticLine(self, -1)
  76
  77         # Load the resource
  78         res = xrc.EmptyXmlResource()
  79         res.LoadFromString(resourceText)
  80
  81         # Now create a panel from the resource data
  82         panel = res.LoadPanel(self, "MyPanel")
  83
  84         # and do the layout
  85         sizer = wx.BoxSizer(wx.VERTICAL)
  86         sizer.Add(label, 0, wx.EXPAND|wx.TOP|wx.LEFT, 5)
  87         sizer.Add(text, 1, wx.EXPAND|wx.ALL, 5)
  88         sizer.Add(line, 0, wx.EXPAND)
  89         sizer.Add(panel, 1, wx.EXPAND|wx.ALL, 5)
  90
  91         self.SetSizer(sizer)
  92         self.SetAutoLayout(True)
  93
  94
  95 #----------------------------------------------------------------------
  96
  97 def runTest(frame, nb, log):
  98     win = TestPanel(nb, log)
  99     return win
 100
 101 #----------------------------------------------------------------------
 102
 103
 104
 105 overview = """<html><body>
 106 <h2><center>wx.XmlResourceSubclass</center></h2>
 107
 108 Sometimes it is necessary to use custom classes, but you still want
 109 them to be created from XRC.  The subclass XRC attribute allows you to
 110 do that.
 111
 112 </body></html>
 113 """
 114
 115
 116
 117 if __name__ == '__main__':
 118     import sys,os
 119     import run
 120     run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
 121