1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
import wx
import images
#----------------------------------------------------------------------
class TestVirtualList(wx.ListCtrl):
def __init__(self, parent, log):
wx.ListCtrl.__init__(
self, parent, -1,
style=wx.LC_REPORT|wx.LC_VIRTUAL|wx.LC_HRULES|wx.LC_VRULES
)
self.log = log
self.il = wx.ImageList(16, 16)
self.idx1 = self.il.Add(images.getSmilesBitmap())
self.SetImageList(self.il, wx.IMAGE_LIST_SMALL)
self.InsertColumn(0, "First")
self.InsertColumn(1, "Second")
self.InsertColumn(2, "Third")
self.SetColumnWidth(0, 175)
self.SetColumnWidth(1, 175)
self.SetColumnWidth(2, 175)
self.SetItemCount(1000000)
self.attr1 = wx.ListItemAttr()
self.attr1.SetBackgroundColour("yellow")
self.attr2 = wx.ListItemAttr()
self.attr2.SetBackgroundColour("light blue")
self.Bind(wx.EVT_LIST_ITEM_SELECTED, self.OnItemSelected)
self.Bind(wx.EVT_LIST_ITEM_ACTIVATED, self.OnItemActivated)
self.Bind(wx.EVT_LIST_ITEM_DESELECTED, self.OnItemDeselected)
def OnItemSelected(self, event):
self.currentItem = event.m_itemIndex
self.log.WriteText('OnItemSelected: "%s", "%s", "%s", "%s"\n' %
(self.currentItem,
self.GetItemText(self.currentItem),
self.getColumnText(self.currentItem, 1),
self.getColumnText(self.currentItem, 2)))
def OnItemActivated(self, event):
self.currentItem = event.m_itemIndex
self.log.WriteText("OnItemActivated: %s\nTopItem: %s\n" %
(self.GetItemText(self.currentItem), self.GetTopItem()))
def getColumnText(self, index, col):
item = self.GetItem(index, col)
return item.GetText()
def OnItemDeselected(self, evt):
self.log.WriteText("OnItemDeselected: %s" % evt.m_itemIndex)
#---------------------------------------------------
# These methods are callbacks for implementing the
# "virtualness" of the list... Normally you would
# determine the text, attributes and/or image based
# on values from some external data source, but for
# this demo we'll just calculate them
def OnGetItemText(self, item, col):
return "Item %d, column %d" % (item, col)
def OnGetItemImage(self, item):
if item % 3 == 0:
return self.idx1
else:
return -1
def OnGetItemAttr(self, item):
if item % 3 == 1:
return self.attr1
elif item % 3 == 2:
return self.attr2
else:
return None
#----------------------------------------------------------------------
def runTest(frame, nb, log):
win = TestVirtualList(nb, log)
return win
#----------------------------------------------------------------------
overview = """\
This example demonstrates the ListCtrl's Virtual List features. A Virtual list
can contain any number of cells, but data is not loaded into the control itself.
It is loaded on demand via virtual methods <code>OnGetItemText(), OnGetItemImage()</code>,
and <code>OnGetItemAttr()</code>. This greatly reduces the amount of memory required
without limiting what can be done with the list control itself.
"""
if __name__ == '__main__':
import sys,os
import run
run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
|
