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