wxPython/demo/wxVListBox.py

   1 # 11/22/2003 - Jeff Grimmett (grimmtooth@softhome.net)
   2 #
   3 # o Updated for wx namespace
   4 #
   5
   6 import  wx
   7
   8 #----------------------------------------------------------------------
   9
  10 # The wxVListBox is much like a regular wxListBox except you draw the
  11 # items yourself and the items can vary in height.
  12 class MyVListBox(wx.VListBox):
  13
  14     # This method must be overridden.  When called it should draw the
  15     # n'th item on the dc within the rect.  How it is drawn, and what
  16     # is drawn is entirely up to you.
  17     def OnDrawItem(self, dc, rect, n):
  18         if self.GetSelection() == n:
  19             c = wx.SystemSettings.GetColour(wx.SYS_COLOUR_HIGHLIGHTTEXT)
  20         else:
  21             c = self.GetForegroundColour()#wx.SystemSettings.GetColour(wx.SYS_COLOUR_HIGHLIGHTTEXT)
  22         dc.SetTextForeground(c)
  23         dc.DrawLabel(self._getItemText(n), rect,
  24                      wx.ALIGN_LEFT | wx.ALIGN_CENTER_VERTICAL)
  25
  26     # This method must be overridden.  It should return the height
  27     # required to draw the n'th item.
  28     def OnMeasureItem(self, n):
  29         height = 0
  30
  31         for line in self._getItemText(n).split('\n'):
  32             w, h = self.GetTextExtent(line)
  33             height += h
  34
  35         return height + 5
  36
  37
  38     # These are also overridable:
  39     #
  40     # OnDrawSeparator(dc, rect, n)
  41     #   Draw a separator between items.  Note that rect may be reduced
  42     #   in size if desired so OnDrawItem gets a smaller rect.
  43     #
  44     # OnDrawBackground(dc, rect, n)
  45     #   Draw the background and maybe a border if desired.
  46
  47
  48     def _getItemText(self, item):
  49         if item % 2 == 0:
  50             return "This is item# %d" % item
  51         else:
  52             return "This is item# %d\n with an extra line" % item
  53
  54 #----------------------------------------------------------------------
  55
  56 # The wx.HtmlListBox derives from wx.VListBox, but draws each item
  57 # itself as a wx.HtmlCell.
  58 class MyHtmlListBox(wx.HtmlListBox):
  59
  60     def OnGetItem(self, n):
  61         if n % 2 == 0:
  62             return "This is item# <b>%d</b>" % n
  63         else:
  64             return "This is item# <b>%d</b> <br>Any <font color='RED'>HTML</font> is okay." % n
  65
  66 #----------------------------------------------------------------------
  67
  68 class TestPanel(wx.Panel):
  69     def __init__(self, parent, log):
  70         self.log = log
  71         wx.Panel.__init__(self, parent, -1)
  72         spacer = 50
  73
  74         vlb = MyVListBox(self, -1, size=(150, 250), style=wx.BORDER_SUNKEN)
  75         vlb.SetItemCount(50)
  76         vlb.SetSelection(0)
  77         vlb.SetFocus()
  78         vlbSizer = wx.BoxSizer(wx.VERTICAL)
  79         vlbSizer.Add((spacer, spacer))
  80         vlbSizer.Add(wx.StaticText(self, -1, "wx.VListBox"), 0, 5, wx.ALL)
  81         vlbSizer.Add(vlb)
  82
  83         hlb = MyHtmlListBox(self, -1, size=(150, 250), style=wx.BORDER_SUNKEN)
  84         hlb.SetItemCount(50)
  85         hlb.SetSelection(0)
  86         hlbSizer = wx.BoxSizer(wx.VERTICAL)
  87         hlbSizer.Add((spacer, spacer))
  88         hlbSizer.Add(wx.StaticText(self, -1, "wx.HtmlListBox"), 0, 5, wx.ALL)
  89         hlbSizer.Add(hlb)
  90
  91         sizer = wx.BoxSizer(wx.HORIZONTAL)
  92         sizer.Add((spacer, spacer))
  93         sizer.Add(vlbSizer)
  94         sizer.Add((spacer, spacer))
  95         sizer.Add((spacer, spacer))
  96         sizer.Add(hlbSizer)
  97
  98         self.SetSizer(sizer)
  99
 100
 101 #----------------------------------------------------------------------
 102
 103 def runTest(frame, nb, log):
 104     win = TestPanel(nb, log)
 105     return win
 106
 107 #----------------------------------------------------------------------
 108
 109
 110
 111 overview = """<html><body>
 112 <h2><center>wxVListBox and wxHtmlListBox</center></h2>
 113 <hr>
 114
 115 The "V" in wxVListBox stands for both "virtual" because it can have an
 116 unlimited number of items since it doesn't store them itself, and
 117 "variable" since items can vary in height.  It has much the same
 118 interface as wxListBox and also emits the same events so you can use
 119 the same EVT_LISTBOX function to connect a handler.
 120 <p>
 121
 122 The wxHtmlListBox derives from wxVListBox, but draws each item itself
 123 as a wxHtmlCell.  This means that you just need to provide a snippet
 124 of HTML for each item when requested.
 125
 126 </body></html>
 127 """
 128
 129
 130
 131 if __name__ == '__main__':
 132     import sys,os
 133     import run
 134     run.main(['', os.path.basename(sys.argv[0])])
 135