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))
  79         self.lb1 = wx.ListBox(self, 60, (100, 50), (90, 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:", (220, 50))
  89         self.lb2 = wx.ListBox(self, 70, (320, 50), (90, 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, (100, 250), (90, 120), sampleList, wx.LB_SINGLE)
 100         fp.SetSelection(0)
 101
 102
 103     def EvtListBox(self, event):
 104         self.log.WriteText('EvtListBox: %s, %s, %s, %s\n' %
 105                            (event.GetString(),
 106                             event.IsSelection(),
 107                             event.GetSelection(),
 108                             event.GetClientData()))
 109
 110         lb = event.GetEventObject()
 111         data = lb.GetClientData(lb.GetSelection())
 112
 113         if data is not None:
 114             self.log.WriteText('\tdata: %s\n' % data)
 115
 116
 117     def EvtListBoxDClick(self, event):
 118         self.log.WriteText('EvtListBoxDClick: %s\n' % self.lb1.GetSelection())
 119         self.lb1.Delete(self.lb1.GetSelection())
 120
 121     def EvtMultiListBox(self, event):
 122         self.log.WriteText('EvtMultiListBox: %s\n' % str(self.lb2.GetSelections()))
 123
 124     def EvtRightButton(self, event):
 125         self.log.WriteText('EvtRightButton: %s\n' % event.GetPosition())
 126
 127         if event.GetEventObject().GetId() == 70:
 128             selections = list(self.lb2.GetSelections())
 129             selections.reverse()
 130
 131             for index in selections:
 132                 self.lb2.Delete(index)
 133
 134
 135 #---------------------------------------------------------------------------
 136
 137 def runTest(frame, nb, log):
 138     win = TestListBox(nb, log)
 139     return win
 140
 141 #---------------------------------------------------------------------------
 142
 143
 144
 145
 146 overview = """<html><body>
 147 A listbox is used to select one or more of a list of
 148 strings. The strings are displayed in a scrolling box, with the
 149 selected string(s) marked in reverse video. A listbox can be single
 150 selection (if an item is selected, the previous selection is removed)
 151 or multiple selection (clicking an item toggles the item on or off
 152 independently of other selections).
 153 </body></html>
 154 """
 155
 156
 157 if __name__ == '__main__':
 158     import sys,os
 159     import run
 160     run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
 161