X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/6f48b1b53fe666431a45338a01da8969e9b0b258..61940a7061d0b5d5122b1e1e939cfa2d72596999:/wxPython/demo/wxListCtrl_virtual.py

diff --git a/wxPython/demo/wxListCtrl_virtual.py b/wxPython/demo/wxListCtrl_virtual.py
index 3e9a8fa7c1..75f5d97573 100644
--- a/wxPython/demo/wxListCtrl_virtual.py
+++ b/wxPython/demo/wxListCtrl_virtual.py
@@ -1,14 +1,31 @@
-
-from wxPython.wx import *
+# 11/20/2003 - Jeff Grimmett (grimmtooth@softhome.net)
+#
+# o Updated for wx namespace
+# 
+# 11/29/2003 - Jeff Grimmett (grimmtooth@softhome.net)
+#
+# o wx.ListItem.GetText() returns a wxString pointer, not the text.
+# 
+
+import  wx
+import  images
 
 #----------------------------------------------------------------------
 
-class TestVirtualList(wxListCtrl):
+class TestVirtualList(wx.ListCtrl):
     def __init__(self, parent, log):
-        wxListCtrl.__init__(self, parent, -1,
-                            style=wxLC_REPORT|wxLC_VIRTUAL|wxLC_HRULES|wxLC_VRULES)
+        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")
@@ -18,14 +35,15 @@ class TestVirtualList(wxListCtrl):
 
         self.SetItemCount(1000000)
 
-        self.attr1 = wxListItemAttr()
+        self.attr1 = wx.ListItemAttr()
         self.attr1.SetBackgroundColour("yellow")
 
-        self.attr2 = wxListItemAttr()
+        self.attr2 = wx.ListItemAttr()
         self.attr2.SetBackgroundColour("light blue")
 
-        EVT_LIST_ITEM_SELECTED(self, self.GetId(), self.OnItemSelected)
-        EVT_LIST_ITEM_ACTIVATED(self, self.GetId(), self.OnItemActivated)
+        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):
@@ -38,22 +56,31 @@ class TestVirtualList(wxListCtrl):
 
     def OnItemActivated(self, event):
         self.currentItem = event.m_itemIndex
-        self.log.WriteText("OnItemActivated: %s\n" % self.GetItemText(self.currentItem))
+        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...
+    # "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):
-        return -1  # if used you should return the index in the ImageList
-
+        if item % 3 == 0:
+            return self.idx1
+        else:
+            return -1
 
     def OnGetItemAttr(self, item):
         if item % 3 == 1:
@@ -73,10 +100,12 @@ def runTest(frame, nb, log):
 #----------------------------------------------------------------------
 
 
-
-
-
 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.
 """