import wx
import data
class TestFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, title="virtual tree with icons", size=(400,500))
il = wx.ImageList(16,16)
self.fldridx = il.Add(
wx.ArtProvider.GetBitmap(wx.ART_FOLDER, wx.ART_OTHER, (16,16)))
self.fldropenidx = il.Add(
wx.ArtProvider.GetBitmap(wx.ART_FILE_OPEN, wx.ART_OTHER, (16,16)))
self.fileidx = il.Add(
wx.ArtProvider.GetBitmap(wx.ART_NORMAL_FILE, wx.ART_OTHER, (16,16)))
self.tree = wx.TreeCtrl(self)
self.tree.AssignImageList(il)
root = self.tree.AddRoot("wx.Object")
self.tree.SetItemImage(root, self.fldridx,
wx.TreeItemIcon_Normal)
self.tree.SetItemImage(root, self.fldropenidx,
wx.TreeItemIcon_Expanded)
# Instead of adding nodes for the whole tree, just attach some
# data to the root node so that it can find and add its child
# nodes when it is expanded, and mark it as having children so
# it will be expandable.
self.tree.SetItemPyData(root, data.tree)
self.tree.SetItemHasChildren(root, True)
# Bind some interesting events
self.Bind(wx.EVT_TREE_ITEM_EXPANDED, self.OnItemExpanded, self.tree)
self.Bind(wx.EVT_TREE_ITEM_COLLAPSED, self.OnItemCollapsed, self.tree)
self.Bind(wx.EVT_TREE_SEL_CHANGED, self.OnSelChanged, self.tree)
self.Bind(wx.EVT_TREE_ITEM_ACTIVATED, self.OnActivated, self.tree)
self.Bind(wx.EVT_TREE_ITEM_EXPANDING, self.OnItemExpanding, self.tree)
self.tree.Expand(root)
def AddTreeNodes(self, parentItem):
"""
Add nodes for just the children of the parentItem
"""
items = self.tree.GetItemPyData(parentItem)
for item in items:
if type(item) == str:
# a leaf node
newItem = self.tree.AppendItem(parentItem, item)
self.tree.SetItemImage(newItem, self.fileidx,
wx.TreeItemIcon_Normal)
else:
# this item has children
newItem = self.tree.AppendItem(parentItem, item[0])
self.tree.SetItemImage(newItem, self.fldridx,
wx.TreeItemIcon_Normal)
self.tree.SetItemImage(newItem, self.fldropenidx,
wx.TreeItemIcon_Expanded)
self.tree.SetItemPyData(newItem, item[1])
self.tree.SetItemHasChildren(newItem, True)
def GetItemText(self, item):
if item:
return self.tree.GetItemText(item)
else:
return ""
def OnItemExpanded(self, evt):
print "OnItemExpanded: ", self.GetItemText(evt.GetItem())
def OnItemExpanding(self, evt):
# When the item is about to be expanded add the first level of child nodes
print "OnItemExpanding:", self.GetItemText(evt.GetItem())
self.AddTreeNodes(evt.GetItem())
def OnItemCollapsed(self, evt):
print "OnItemCollapsed:", self.GetItemText(evt.GetItem())
# And remove them when collapsed as we don't need them any longer
self.tree.DeleteChildren(evt.GetItem())
def OnSelChanged(self, evt):
print "OnSelChanged: ", self.GetItemText(evt.GetItem())
def OnActivated(self, evt):
print "OnActivated: ", self.GetItemText(evt.GetItem())
app = wx.PySimpleApp(redirect=True)
frame = TestFrame()
frame.Show()
app.MainLoop()
|