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