wxPython/demo/ListBox.py

   1
   2 import  wx
   3
   4 #---------------------------------------------------------------------------
   5
   6 # This listbox subclass lets you type the starting letters of what you want to
   7 # select, and scrolls the list to the match if it is found.
   8 class FindPrefixListBox(wx.ListBox):
   9     def __init__(self, parent, id, pos=wx.DefaultPosition, size=wx.DefaultSize,
  10                  choices=[], style=0, validator=wx.DefaultValidator):
  11         wx.ListBox.__init__(self, parent, id, pos, size, choices, style, validator)
  12         self.typedText = ''
  13         self.log = parent.log
  14         self.Bind(wx.EVT_KEY_DOWN, self.OnKey)
  15
  16
  17     def FindPrefix(self, prefix):
  18         self.log.WriteText('Looking for prefix: %s\n' % prefix)
  19
  20         if prefix:
  21             prefix = prefix.lower()
  22             length = len(prefix)
  23
  24             # Changed in 2.5 because ListBox.Number() is no longer supported.
  25             # ListBox.GetCount() is now the appropriate way to go.
  26             for x in range(self.GetCount()):
  27                 text = self.GetString(x)
  28                 text = text.lower()
  29
  30                 if text[:length] == prefix:
  31                     self.log.WriteText('Prefix %s is found.\n' % prefix)
  32                     return x
  33
  34         self.log.WriteText('Prefix %s is not found.\n' % prefix)
  35         return -1
  36
  37
  38     def OnKey(self, evt):
  39         key = evt.GetKeyCode()
  40
  41         if key >= 32 and key <= 127:
  42             self.typedText = self.typedText + chr(key)
  43             item = self.FindPrefix(self.typedText)
  44
  45             if item != -1:
  46                 self.SetSelection(item)
  47
  48         elif key == wx.WXK_BACK:   # backspace removes one character and backs up
  49             self.typedText = self.typedText[:-1]
  50
  51             if not self.typedText:
  52                 self.SetSelection(0)
  53             else:
  54                 item = self.FindPrefix(self.typedText)
  55
  56                 if item != -1:
  57                     self.SetSelection(item)
  58         else:
  59             self.typedText = ''
  60             evt.Skip()
  61
  62     def OnKeyDown(self, evt):
  63         pass
  64
  65
  66 #---------------------------------------------------------------------------
  67
  68 class TestListBox(wx.Panel):
  69     def __init__(self, parent, log):
  70         self.log = log
  71         wx.Panel.__init__(self, parent, -1)
  72
  73         sampleList = ['zero', 'one', 'two', 'three', 'four', 'five',
  74                       'six', 'seven', 'eight', 'nine', 'ten', 'eleven',
  75                       'twelve', 'thirteen', 'fourteen']
  76
  77         wx.StaticText(self, -1, "This example uses the wx.ListBox control.", (45, 10))
  78         wx.StaticText(self, -1, "Select one:", (15, 50), (65, 18))
  79         self.lb1 = wx.ListBox(self, 60, (80, 50), (80, 120), sampleList, wx.LB_SINGLE)
  80         self.Bind(wx.EVT_LISTBOX, self.EvtListBox, self.lb1)
  81         self.Bind(wx.EVT_LISTBOX_DCLICK, self.EvtListBoxDClick, self.lb1)
  82         self.lb1.Bind(wx.EVT_RIGHT_UP, self.EvtRightButton)
  83         self.lb1.SetSelection(3)
  84         self.lb1.Append("with data", "This one has data");
  85         self.lb1.SetClientData(2, "This one has data");
  86
  87
  88         wx.StaticText(self, -1, "Select many:", (200, 50), (65, 18))
  89         self.lb2 = wx.ListBox(self, 70, (300, 50), (80, 120), sampleList, wx.LB_EXTENDED)
  90         self.Bind(wx.EVT_LISTBOX, self.EvtMultiListBox, self.lb2)
  91         self.lb2.Bind(wx.EVT_RIGHT_UP, self.EvtRightButton)
  92         self.lb2.SetSelection(0)
  93
  94         sampleList = sampleList + ['test a', 'test aa', 'test aab',
  95                                    'test ab', 'test abc', 'test abcc',
  96                                    'test abcd' ]
  97         sampleList.sort()
  98         wx.StaticText(self, -1, "Find Prefix:", (15, 250))
  99         fp = FindPrefixListBox(self, -1, (80, 250), (80, 120), sampleList, wx.LB_SINGLE)
 100         fp.SetSelection(0)
 101
 102
 103     def EvtListBox(self, event):
 104         self.log.WriteText('EvtListBox: %s, %s, %s\n' %
 105                            (event.GetString(), event.IsSelection(), event.GetSelection()))
 106
 107         lb = event.GetEventObject()
 108         data = lb.GetClientData(lb.GetSelection())
 109
 110         if data is not None:
 111             self.log.WriteText('\tdata: %s\n' % data)
 112
 113
 114     def EvtListBoxDClick(self, event):
 115         self.log.WriteText('EvtListBoxDClick: %s\n' % self.lb1.GetSelection())
 116         self.lb1.Delete(self.lb1.GetSelection())
 117
 118     def EvtMultiListBox(self, event):
 119         self.log.WriteText('EvtMultiListBox: %s\n' % str(self.lb2.GetSelections()))
 120
 121     def EvtRightButton(self, event):
 122         self.log.WriteText('EvtRightButton: %s\n' % event.GetPosition())
 123
 124         if event.GetEventObject().GetId() == 70:
 125             selections = list(self.lb2.GetSelections())
 126             selections.reverse()
 127
 128             for index in selections:
 129                 self.lb2.Delete(index)
 130
 131
 132 #---------------------------------------------------------------------------
 133
 134 def runTest(frame, nb, log):
 135     win = TestListBox(nb, log)
 136     return win
 137
 138 #---------------------------------------------------------------------------
 139
 140
 141
 142
 143 overview = """<html><body>
 144 A listbox is used to select one or more of a list of
 145 strings. The strings are displayed in a scrolling box, with the
 146 selected string(s) marked in reverse video. A listbox can be single
 147 selection (if an item is selected, the previous selection is removed)
 148 or multiple selection (clicking an item toggles the item on or off
 149 independently of other selections).
 150 </body></html>
 151 """
 152
 153
 154 if __name__ == '__main__':
 155     import sys,os
 156     import run
 157     run.main(['', os.path.basename(sys.argv[0])])
 158