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         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
  48     def OnSize(self, evt):
  49         sz = self.GetSize()
  50         w, h = self.t.GetTextExtent(self.t.GetLabel())
  51         self.t.SetPosition(((sz.width-w)/2, (sz.height-h)/2))
  52
  53 #----------------------------------------------------------------------
  54
  55
  56 class TestPanel(wx.Panel):
  57     def __init__(self, parent, log):
  58         self.log = log
  59         wx.Panel.__init__(self, parent, -1)
  60
  61         # make the components
  62         label = wx.StaticText(self, -1, "The lower panel was built from this XML:")
  63         label.SetFont(wx.Font(12, wx.SWISS, wx.NORMAL, wx.BOLD))
  64
  65         text = wx.TextCtrl(self, -1, resourceText,
  66                           style=wx.TE_READONLY|wx.TE_MULTILINE)
  67         text.SetInsertionPoint(0)
  68
  69         line = wx.StaticLine(self, -1)
  70
  71         # Load the resource
  72         res = xrc.EmptyXmlResource()
  73         res.LoadFromString(resourceText)
  74
  75         # Now create a panel from the resource data
  76         panel = res.LoadPanel(self, "MyPanel")
  77
  78         # and do the layout
  79         sizer = wx.BoxSizer(wx.VERTICAL)
  80         sizer.Add(label, 0, wx.EXPAND|wx.TOP|wx.LEFT, 5)
  81         sizer.Add(text, 1, wx.EXPAND|wx.ALL, 5)
  82         sizer.Add(line, 0, wx.EXPAND)
  83         sizer.Add(panel, 1, wx.EXPAND|wx.ALL, 5)
  84
  85         self.SetSizer(sizer)
  86         self.SetAutoLayout(True)
  87
  88
  89 #----------------------------------------------------------------------
  90
  91 def runTest(frame, nb, log):
  92     win = TestPanel(nb, log)
  93     return win
  94
  95 #----------------------------------------------------------------------
  96
  97
  98
  99 overview = """<html><body>
 100 <h2><center>wx.XmlResourceSubclass</center></h2>
 101
 102 Sometimes it is necessary to use custom classes, but you still want
 103 them to be created from XRC.  The subclass XRC attribute allows you to
 104 do that.
 105
 106 </body></html>
 107 """
 108
 109
 110
 111 if __name__ == '__main__':
 112     import sys,os
 113     import run
 114     run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
 115