+++ /dev/null
-
-import wx
-import wx.xrc as xrc
-
-#----------------------------------------------------------------------
-
-resourceText = r'''<?xml version="1.0"?>
-<resource>
-
-<!-- Notice that the class is NOT a standard wx class -->
-
-<object class="MyCustomPanel" name="MyPanel">
- <size>200,100</size>
- <object class="wxStaticText" name="label1">
- <label>This panel is a custom class derived from wx.Panel,\nand is loaded by a custom XmlResourceHandler.</label>
- <pos>10,10</pos>
- </object>
-</object>
-</resource>
-'''
-
-#----------------------------------------------------------------------
-
-class MyCustomPanel(wx.Panel):
- def __init__(self, parent, id, pos, size, style, name):
- wx.Panel.__init__(self, parent, id, pos, size, style, name)
-
- # This is the little bit of customization that we do for this
- # silly example.
- self.Bind(wx.EVT_SIZE, self.OnSize)
- t = wx.StaticText(self, -1, "MyCustomPanel")
- f = t.GetFont()
- f.SetWeight(wx.BOLD)
- f.SetPointSize(f.GetPointSize()+2)
- t.SetFont(f)
- self.t = t
-
- def OnSize(self, evt):
- sz = self.GetSize()
- w, h = self.t.GetTextExtent(self.t.GetLabel())
- self.t.SetPosition(((sz.width-w)/2, (sz.height-h)/2))
-
-
-# To do it the more complex way, (see below) we need to write the
-# class a little differently... This could obviously be done with a
-# single class, but I wanted to make separate ones to make clear what
-# the different requirements are.
-class PreMyCustomPanel(wx.Panel):
- def __init__(self):
- p = wx.PrePanel()
- self.PostCreate(p)
-
- def Create(self, parent, id, pos, size, style, name):
- wx.Panel.Create(self, parent, id, pos, size, style, name)
- self.Bind(wx.EVT_SIZE, self.OnSize)
- t = wx.StaticText(self, -1, "MyCustomPanel")
- f = t.GetFont()
- f.SetWeight(wx.BOLD)
- f.SetPointSize(f.GetPointSize()+2)
- t.SetFont(f)
- self.t = t
-
- def OnSize(self, evt):
- sz = self.GetSize()
- w, h = self.t.GetTextExtent(self.t.GetLabel())
- self.t.SetPosition(((sz.width-w)/2, (sz.height-h)/2))
-
-#----------------------------------------------------------------------
-
-class MyCustomPanelXmlHandler(xrc.XmlResourceHandler):
- def __init__(self):
- xrc.XmlResourceHandler.__init__(self)
- # Specify the styles recognized by objects of this type
- self.AddStyle("wxNO_3D", wx.NO_3D)
- self.AddStyle("wxTAB_TRAVERSAL", wx.TAB_TRAVERSAL)
- self.AddStyle("wxWS_EX_VALIDATE_RECURSIVELY", wx.WS_EX_VALIDATE_RECURSIVELY)
- self.AddStyle("wxCLIP_CHILDREN", wx.CLIP_CHILDREN)
- self.AddWindowStyles()
-
- # This method and the next one are required for XmlResourceHandlers
- def CanHandle(self, node):
- return self.IsOfClass(node, "MyCustomPanel")
-
- def DoCreateResource(self):
- # NOTE: wxWindows can be created in either a single-phase or
- # in a two-phase way. Single phase is what you normally do,
- # and two-phase creates the instnace first, and then later
- # creates the actual window when the Create method is called.
- # (In wxPython the first phase is done using the wxPre*
- # function, for example, wxPreFrame, wxPrePanel, etc.)
- #
- # wxXmlResource supports either method, a premade instance can
- # be created and populated by xrc using the appropriate
- # LoadOn* method (such as LoadOnPanel) or xrc can create the
- # instance too, using the Load* method. However this makes
- # the handlers a bit more complex. If you can be sure that a
- # particular class will never be loaded using a pre-existing
- # instance, then you can make the handle much simpler. I'll
- # show both methods below.
-
- if 1:
- # The simple method assumes that there is no existing
- # instance. Be sure of that with an assert.
- assert self.GetInstance() is None
-
- # Now create the object
- panel = MyCustomPanel(self.GetParentAsWindow(),
- self.GetID(),
- self.GetPosition(),
- self.GetSize(),
- self.GetStyle("style", wx.TAB_TRAVERSAL),
- self.GetName()
- )
- else:
- # When using the more complex (but more flexible) method
- # the instance may already have been created, check for it
- panel = self.GetInstance()
- if panel is None:
- # if not, then create the instance (but not the window)
- panel = PreMyCustomPanel()
-
- # Now call the panel's Create method to actually create the window
- panel.Create(self.GetParentAsWindow(),
- self.GetID(),
- self.GetPosition(),
- self.GetSize(),
- self.GetStyle("style", wx.TAB_TRAVERSAL),
- self.GetName()
- )
-
- # These two things should be done in either case:
- # Set standard window attributes
- self.SetupWindow(panel)
- # Create any child windows of this node
- self.CreateChildren(panel)
-
- return panel
-
-
-#----------------------------------------------------------------------
-
-
-class TestPanel(wx.Panel):
- def __init__(self, parent, log):
- self.log = log
- wx.Panel.__init__(self, parent, -1)
-
- # make the components
- label = wx.StaticText(self, -1, "The lower panel was built from this XML:")
- label.SetFont(wx.Font(12, wx.SWISS, wx.NORMAL, wx.BOLD))
-
- text = wx.TextCtrl(self, -1, resourceText,
- style=wx.TE_READONLY|wx.TE_MULTILINE)
- text.SetInsertionPoint(0)
-
- line = wx.StaticLine(self, -1)
-
- # Load the resource
- res = xrc.EmptyXmlResource()
- res.InsertHandler(MyCustomPanelXmlHandler())
- res.LoadFromString(resourceText)
-
- # Now create a panel from the resource data
- panel = res.LoadObject(self, "MyPanel", "MyCustomPanel")
-
- # and do the layout
- sizer = wx.BoxSizer(wx.VERTICAL)
- sizer.Add(label, 0, wx.EXPAND|wx.TOP|wx.LEFT, 5)
- sizer.Add(text, 1, wx.EXPAND|wx.ALL, 5)
- sizer.Add(line, 0, wx.EXPAND)
- sizer.Add(panel, 1, wx.EXPAND|wx.ALL, 5)
-
- self.SetSizer(sizer)
- self.SetAutoLayout(True)
-
-
-#----------------------------------------------------------------------
-
-def runTest(frame, nb, log):
- win = TestPanel(nb, log)
- return win
-
-#----------------------------------------------------------------------
-
-
-
-overview = """<html><body>
-<h2><center>wx.XmlResourceHandler</center></h2>
-
-Deriving a class from wx.XmlResourceHandler allows you to specify your
-own classes in XRC resources, and your handler class will then be used
-to create instances of that class when the resource is loaded.
-
-</body></html>
-"""
-
-
-
-if __name__ == '__main__':
- import sys,os
- import run
- run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
-
projects / wxWidgets.git / blobdiff