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 blue panel is a class derived from wx.Panel
  18 and is loaded by a using a subclass attribute of the object tag.</label>
  19         <pos>10,10</pos>
  20     </object>
  21 </object>
  22 </resource>
  23 '''
  24
  25 #----------------------------------------------------------------------
  26
  27 class MyCustomPanel(wx.Panel):
  28     def __init__(self):
  29         p = wx.PrePanel()
  30         # the Create step is done by XRC.
  31         self.PostCreate(p)
  32         self.Bind(wx.EVT_WINDOW_CREATE, self.OnCreate)
  33         self.Bind(wx.EVT_SIZE, self.OnSize)
  34
  35
  36     def OnCreate(self, evt):
  37         # This is the little bit of customization that we do for this
  38         # silly example.  It could just as easily have been done in
  39         # the resource.  We do it in the EVT_WINDOW_CREATE handler
  40         # because the window doesn't really exist yet in the __init__.
  41         if self is evt.GetEventObject():
  42             t = wx.StaticText(self, -1, "MyCustomPanel")
  43             f = t.GetFont()
  44             f.SetWeight(wx.BOLD)
  45             f.SetPointSize(f.GetPointSize()+2)
  46             t.SetFont(f)
  47             self.t = t
  48             # On OSX the EVT_SIZE happens before EVT_WINDOW_CREATE !?!
  49             # so give it another kick
  50             wx.CallAfter(self.OnSize, None)
  51
  52
  53     def OnSize(self, evt):
  54         if hasattr(self, 't'):
  55             sz = self.GetSize()
  56             w, h = self.t.GetTextExtent(self.t.GetLabel())
  57             print w, h
  58             self.t.SetPosition(((sz.width-w)/2, (sz.height-h)/2))
  59
  60 #----------------------------------------------------------------------
  61
  62
  63 class TestPanel(wx.Panel):
  64     def __init__(self, parent, log):
  65         self.log = log
  66         wx.Panel.__init__(self, parent, -1)
  67
  68         # make the components
  69         label = wx.StaticText(self, -1, "The lower panel was built from this XML:")
  70         label.SetFont(wx.Font(12, wx.SWISS, wx.NORMAL, wx.BOLD))
  71
  72         text = wx.TextCtrl(self, -1, resourceText,
  73                           style=wx.TE_READONLY|wx.TE_MULTILINE)
  74         text.SetInsertionPoint(0)
  75
  76         line = wx.StaticLine(self, -1)
  77
  78         # Load the resource
  79         res = xrc.EmptyXmlResource()
  80         res.LoadFromString(resourceText)
  81
  82         # Now create a panel from the resource data
  83         #panel = res.LoadPanel(self, "MyPanel")
  84         panel = MyCustomPanel()
  85         panel.Create(self, -1)
  86
  87         # and do the layout
  88         sizer = wx.BoxSizer(wx.VERTICAL)
  89         sizer.Add(label, 0, wx.EXPAND|wx.TOP|wx.LEFT, 5)
  90         sizer.Add(text, 1, wx.EXPAND|wx.ALL, 5)
  91         sizer.Add(line, 0, wx.EXPAND)
  92         sizer.Add(panel, 1, wx.EXPAND|wx.ALL, 5)
  93
  94         self.SetSizer(sizer)
  95         self.SetAutoLayout(True)
  96
  97
  98 #----------------------------------------------------------------------
  99
 100 def runTest(frame, nb, log):
 101     win = TestPanel(nb, log)
 102     return win
 103
 104 #----------------------------------------------------------------------
 105
 106
 107
 108 overview = """<html><body>
 109 <h2><center>wx.XmlResourceSubclass</center></h2>
 110
 111 Sometimes it is necessary to use custom classes, but you still want
 112 them to be created from XRC.  The subclass XRC attribute allows you to
 113 do that.
 114
 115 </body></html>
 116 """
 117
 118
 119
 120 if __name__ == '__main__':
 121     import sys,os
 122     import run
 123     run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
 124