wxPython/demo/wxVListBox.py

   1
   2 from wxPython.wx import *
   3
   4 #----------------------------------------------------------------------
   5
   6 # The wxVListBox is much like a regular wxListBox except you draw the
   7 # items yourself and the items can vary in height.
   8 class MyVListBox(wxVListBox):
   9
  10     # This method must be overridden.  When called it should draw the
  11     # n'th item on the dc within the rect.  How it is drawn, and what
  12     # is drawn is entirely up to you.
  13     def OnDrawItem(self, dc, rect, n):
  14         dc.DrawLabel(self._getItemText(n), rect,
  15                      wxALIGN_LEFT | wxALIGN_CENTER_VERTICAL)
  16
  17     # This method must be overridden.  It should return the height
  18     # required to draw the n'th item.
  19     def OnMeasureItem(self, n):
  20         height = 0
  21         for line in self._getItemText(n).split('\n'):
  22             w, h = self.GetTextExtent(line)
  23             height += h
  24         return height + 5
  25
  26
  27     # These are also overridable:
  28     #
  29     # OnDrawSeparator(dc, rect, n)
  30     #   Draw a separator between items.  Note that rect may be reduced
  31     #   in size if desired so OnDrawItem gets a smaller rect.
  32     #
  33     # OnDrawBackground(dc, rect, n)
  34     #   Draw the background and maybe a border if desired.
  35
  36
  37     def _getItemText(self, item):
  38         if item % 2 == 0:
  39             return "This is item# %d" % item
  40         else:
  41             return "This is item# %d\n with an extra line" % item
  42
  43 #----------------------------------------------------------------------
  44
  45 # The wxHtmlListBox derives from wxVListBox, but draws each item
  46 # itself as a wxHtmlCell.
  47 class MyHtmlListBox(wxHtmlListBox):
  48
  49     def OnGetItem(self, n):
  50         if n % 2 == 0:
  51             return "This is item# <b>%d</b>" % n
  52         else:
  53             return "This is item# <b>%d</b> <br>Any <font color='RED'>HTML</font> is okay." % n
  54
  55 #----------------------------------------------------------------------
  56
  57 class TestPanel(wxPanel):
  58     def __init__(self, parent, log):
  59         self.log = log
  60         wxPanel.__init__(self, parent, -1)
  61         spacer = 50
  62
  63         vlb = MyVListBox(self, -1, size=(150, 250), style=wxBORDER_SUNKEN)
  64         vlb.SetItemCount(50)
  65         vlb.SetSelection(0)
  66         vlb.SetFocus()
  67         vlbSizer = wxBoxSizer(wxVERTICAL)
  68         vlbSizer.Add((spacer, spacer))
  69         vlbSizer.Add(wxStaticText(self, -1, "wxVListBox"), 0, 5, wxALL)
  70         vlbSizer.Add(vlb)
  71
  72         hlb = MyHtmlListBox(self, -1, size=(150, 250), style=wxBORDER_SUNKEN)
  73         hlb.SetItemCount(50)
  74         hlb.SetSelection(0)
  75         hlbSizer = wxBoxSizer(wxVERTICAL)
  76         hlbSizer.Add((spacer, spacer))
  77         hlbSizer.Add(wxStaticText(self, -1, "wxHtmlListBox"), 0, 5, wxALL)
  78         hlbSizer.Add(hlb)
  79
  80         sizer = wxBoxSizer(wxHORIZONTAL)
  81         sizer.Add((spacer, spacer))
  82         sizer.Add(vlbSizer)
  83         sizer.Add((spacer, spacer))
  84         sizer.Add((spacer, spacer))
  85         sizer.Add(hlbSizer)
  86
  87         self.SetSizer(sizer)
  88
  89
  90 #----------------------------------------------------------------------
  91
  92 def runTest(frame, nb, log):
  93     win = TestPanel(nb, log)
  94     return win
  95
  96 #----------------------------------------------------------------------
  97
  98
  99
 100 overview = """<html><body>
 101 <h2><center>wxVListBox and wxHtmlListBox</center></h2>
 102 <hr>
 103
 104 The "V" in wxVListBox stands for both "virtual" because it can have an
 105 unlimited number of items since it doesn't store them itself, and
 106 "variable" since items can vary in height.  It has much the same
 107 interface as wxListBox and also emits the same events so you can use
 108 the same EVT_LISTBOX function to connect a handler.
 109 <p>
 110
 111 The wxHtmlListBox derives from wxVListBox, but draws each item itself
 112 as a wxHtmlCell.  This means that you just need to provide a snippet
 113 of HTML for each item when requested.
 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])])
 124