wxPython/demo/VListBox.py

   1
   2 import  wx
   3
   4 #----------------------------------------------------------------------
   5
   6 # The wx.VListBox is much like a regular wx.ListBox except you draw the
   7 # items yourself and the items can vary in height.
   8 class MyVListBox(wx.VListBox):
   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         if self.GetSelection() == n:
  15             c = wx.SystemSettings.GetColour(wx.SYS_COLOUR_HIGHLIGHTTEXT)
  16         else:
  17             c = self.GetForegroundColour()
  18         dc.SetFont(self.GetFont())
  19         dc.SetTextForeground(c)
  20         dc.DrawLabel(self._getItemText(n), rect,
  21                      wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL)
  22
  23     # This method must be overridden.  It should return the height
  24     # required to draw the n'th item.
  25     def OnMeasureItem(self, n):
  26         height = 0
  27         for line in self._getItemText(n).split('\n'):
  28             w, h = self.GetTextExtent(line)
  29             height += h
  30         return height + 5
  31
  32
  33     # These are also overridable:
  34     #
  35     # OnDrawSeparator(dc, rect, n)
  36     #   Draw a separator between items.  Note that rect may be reduced
  37     #   in size if desired so OnDrawItem gets a smaller rect.
  38     #
  39     # OnDrawBackground(dc, rect, n)
  40     #   Draw the background and maybe a border if desired.
  41
  42
  43     def _getItemText(self, item):
  44         if item % 2 == 0:
  45             return "This is item# %d" % item
  46         else:
  47             return "This is item# %d\n with an extra line" % item
  48
  49 #----------------------------------------------------------------------
  50
  51 # The wx.HtmlListBox derives from wx.VListBox, but draws each item
  52 # itself as a wx.HtmlCell.
  53 class MyHtmlListBox(wx.HtmlListBox):
  54
  55     def OnGetItem(self, n):
  56         if n % 2 == 0:
  57             return "This is item# <b>%d</b>" % n
  58         else:
  59             return "This is item# <b>%d</b> <br>Any <font color='RED'>HTML</font> is okay." % n
  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         spacer = 50
  68
  69         vlb = MyVListBox(self, -1, size=(150, 250), style=wx.BORDER_SUNKEN)
  70         vlb.SetItemCount(50)
  71         vlb.SetSelection(0)
  72         vlb.SetFocus()
  73         vlbSizer = wx.BoxSizer(wx.VERTICAL)
  74         vlbSizer.Add((spacer, spacer))
  75         vlbSizer.Add(wx.StaticText(self, -1, "wx.VListBox"), 0, 5, wx.ALL)
  76         vlbSizer.Add(vlb)
  77
  78         hlb = MyHtmlListBox(self, -1, size=(150, 250), style=wx.BORDER_SUNKEN)
  79         hlb.SetItemCount(50)
  80         hlb.SetSelection(0)
  81         hlbSizer = wx.BoxSizer(wx.VERTICAL)
  82         hlbSizer.Add((spacer, spacer))
  83         hlbSizer.Add(wx.StaticText(self, -1, "wx.HtmlListBox"), 0, 5, wx.ALL)
  84         hlbSizer.Add(hlb)
  85
  86         sizer = wx.BoxSizer(wx.HORIZONTAL)
  87         sizer.Add((spacer, spacer))
  88         sizer.Add(vlbSizer)
  89         sizer.Add((spacer, spacer))
  90         sizer.Add((spacer, spacer))
  91         sizer.Add(hlbSizer)
  92
  93         self.SetSizer(sizer)
  94
  95
  96 #----------------------------------------------------------------------
  97
  98 def runTest(frame, nb, log):
  99     win = TestPanel(nb, log)
 100     return win
 101
 102 #----------------------------------------------------------------------
 103
 104
 105
 106 overview = """<html><body>
 107 <h2><center>wx.VListBox and wx.HtmlListBox</center></h2>
 108 <hr>
 109
 110 The "V" in wxVListBox stands for both "virtual" because it can have an
 111 unlimited number of items since it doesn't store them itself, and
 112 "variable" since items can vary in height.  It has much the same
 113 interface as wxListBox and also emits the same events so you can use
 114 the same EVT_LISTBOX function to connect a handler.
 115 <p>
 116
 117 The wx.HtmlListBox derives from wx.VListBox, but draws each item itself
 118 as a wx.HtmlCell.  This means that you just need to provide a snippet
 119 of HTML for each item when requested.
 120
 121 </body></html>
 122 """
 123
 124
 125
 126 if __name__ == '__main__':
 127     import sys,os
 128     import run
 129     run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
 130