controls/FolderTree.py
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Sat, 19 Aug 2017 17:04:31 +0300
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# This file is part of Beremiz, a Integrated Development Environment for
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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
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#
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# Copyright (C) 2013: Edouard TISSERANT and Laurent BESSARD
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#
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# See COPYING file for copyrights details.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
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import os
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import wx
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from util.BitmapLibrary import GetBitmap
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DRIVE, FOLDER, FILE = range(3)
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def sort_folder(x, y):
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    if x[1] == y[1]:
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        return cmp(x[0], y[0])
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    elif x[1] != FILE:
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        return -1
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    else:
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        return 1
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def splitpath(path):
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    head, tail = os.path.split(path)
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    if head == "":
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        return [tail]
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    elif tail == "":
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        return splitpath(head)
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    return splitpath(head) + [tail]
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class FolderTree(wx.Panel):
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    def __init__(self, parent, folder, filter=None, editable=True):
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        wx.Panel.__init__(self, parent, style=wx.TAB_TRAVERSAL)
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        main_sizer = wx.BoxSizer(wx.VERTICAL)
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        self.Tree = wx.TreeCtrl(self,
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                                style=(wx.TR_HAS_BUTTONS |
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                                       wx.TR_SINGLE |
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                                       wx.SUNKEN_BORDER |
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                                       wx.TR_HIDE_ROOT |
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                                       wx.TR_LINES_AT_ROOT |
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                                       wx.TR_EDIT_LABELS))
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        if wx.Platform == '__WXMSW__':
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            self.Bind(wx.EVT_TREE_ITEM_ACTIVATED, self.OnTreeItemExpanded, self.Tree)
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            self.Tree.Bind(wx.EVT_LEFT_DOWN, self.OnTreeLeftDown)
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        else:
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            self.Bind(wx.EVT_TREE_ITEM_EXPANDED, self.OnTreeItemExpanded, self.Tree)
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        self.Bind(wx.EVT_TREE_ITEM_COLLAPSED, self.OnTreeItemCollapsed, self.Tree)
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        self.Bind(wx.EVT_TREE_BEGIN_LABEL_EDIT, self.OnTreeBeginLabelEdit, self.Tree)
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        self.Bind(wx.EVT_TREE_END_LABEL_EDIT, self.OnTreeEndLabelEdit, self.Tree)
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        main_sizer.AddWindow(self.Tree, 1, flag=wx.GROW)
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        if filter is not None:
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            self.Filter = wx.ComboBox(self, style=wx.CB_READONLY)
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            self.Bind(wx.EVT_COMBOBOX, self.OnFilterChanged, self.Filter)
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            main_sizer.AddWindow(self.Filter, flag=wx.GROW)
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        else:
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            self.Filter = None
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        self.SetSizer(main_sizer)
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        self.Folder = folder
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        self.Editable = editable
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        self.TreeImageList = wx.ImageList(16, 16)
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        self.TreeImageDict = {}
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        for item_type, bitmap in [(DRIVE, "tree_drive"),
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                                  (FOLDER, "tree_folder"),
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                                  (FILE, "tree_file")]:
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            self.TreeImageDict[item_type] = self.TreeImageList.Add(GetBitmap(bitmap))
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        self.Tree.SetImageList(self.TreeImageList)
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        self.Filters = {}
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        if self.Filter is not None:
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            filter_parts = filter.split("|")
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            for idx in xrange(0, len(filter_parts), 2):
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                if filter_parts[idx + 1] == "*.*":
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                    self.Filters[filter_parts[idx]] = ""
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                else:
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                    self.Filters[filter_parts[idx]] = filter_parts[idx + 1].replace("*", "")
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                self.Filter.Append(filter_parts[idx])
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                if idx == 0:
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                    self.Filter.SetStringSelection(filter_parts[idx])
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            self.CurrentFilter = self.Filters[self.Filter.GetStringSelection()]
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        else:
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            self.CurrentFilter = ""
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    def _GetFolderChildren(self, folderpath, recursive=True):
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        items = []
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        if wx.Platform == '__WXMSW__' and folderpath == "/":
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            for c in xrange(ord('a'), ord('z')):
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                drive = os.path.join("%s:\\" % chr(c))
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                if os.path.exists(drive):
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                    items.append((drive, DRIVE, self._GetFolderChildren(drive, False)))
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        else:
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            try:
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                files = os.listdir(folderpath)
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            except:
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                return []
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            for filename in files:
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                if not filename.startswith("."):
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                    filepath = os.path.join(folderpath, filename)
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                    if os.path.isdir(filepath):
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                        if recursive:
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                            children = len(self._GetFolderChildren(filepath, False))
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                        else:
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                            children = 0
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                        items.append((filename, FOLDER, children))
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                    elif (self.CurrentFilter == "" or
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                          os.path.splitext(filename)[1] == self.CurrentFilter):
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                        items.append((filename, FILE, None))
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        if recursive:
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            items.sort(sort_folder)
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        return items
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    def SetFilter(self, filter):
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        self.CurrentFilter = filter
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    def GetTreeCtrl(self):
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        return self.Tree
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    def RefreshTree(self):
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        root = self.Tree.GetRootItem()
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        if not root.IsOk():
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            root = self.Tree.AddRoot("")
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        self.GenerateTreeBranch(root, self.Folder)
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    def GenerateTreeBranch(self, root, folderpath):
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        item, item_cookie = self.Tree.GetFirstChild(root)
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        for idx, (filename, item_type, children) in enumerate(self._GetFolderChildren(folderpath)):
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            if not item.IsOk():
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                item = self.Tree.AppendItem(root, filename, self.TreeImageDict[item_type])
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                if wx.Platform != '__WXMSW__':
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                    item, item_cookie = self.Tree.GetNextChild(root, item_cookie)
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            elif self.Tree.GetItemText(item) != filename:
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                item = self.Tree.InsertItemBefore(root, idx, filename, self.TreeImageDict[item_type])
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            filepath = os.path.join(folderpath, filename)
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            if item_type != FILE:
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                if self.Tree.IsExpanded(item):
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                    self.GenerateTreeBranch(item, filepath)
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                elif children > 0:
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                    self.Tree.SetItemHasChildren(item)
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            item, item_cookie = self.Tree.GetNextChild(root, item_cookie)
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        to_delete = []
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        while item.IsOk():
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            to_delete.append(item)
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            item, item_cookie = self.Tree.GetNextChild(root, item_cookie)
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        for item in to_delete:
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            self.Tree.Delete(item)
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    def ExpandItem(self, item):
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        self.GenerateTreeBranch(item, self.GetPath(item))
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        self.Tree.Expand(item)
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    def OnTreeItemActivated(self, event):
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        self.ExpandItem(event.GetItem())
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        event.Skip()
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    def OnTreeLeftDown(self, event):
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        item, flags = self.Tree.HitTest(event.GetPosition())
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        if flags & wx.TREE_HITTEST_ONITEMBUTTON and not self.Tree.IsExpanded(item):
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            self.ExpandItem(item)
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        else:
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            event.Skip()
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    def OnTreeItemExpanded(self, event):
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        item = event.GetItem()
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        self.GenerateTreeBranch(item, self.GetPath(item))
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        event.Skip()
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    def OnTreeItemCollapsed(self, event):
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        item = event.GetItem()
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        self.Tree.DeleteChildren(item)
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        self.Tree.SetItemHasChildren(item)
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        event.Skip()
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    def OnTreeBeginLabelEdit(self, event):
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        item = event.GetItem()
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        if self.Editable and not self.Tree.ItemHasChildren(item):
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            event.Skip()
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        else:
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            event.Veto()
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    def OnTreeEndLabelEdit(self, event):
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        new_name = event.GetLabel()
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        if new_name != "":
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            old_filepath = self.GetPath(event.GetItem())
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            new_filepath = os.path.join(os.path.split(old_filepath)[0], new_name)
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            if new_filepath != old_filepath:
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                if not os.path.exists(new_filepath):
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                    os.rename(old_filepath, new_filepath)
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                    event.Skip()
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                else:
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                    message = wx.MessageDialog(self,
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                                               _("File '%s' already exists!") % new_name,
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                                               _("Error"), wx.OK | wx.ICON_ERROR)
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                    message.ShowModal()
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                    message.Destroy()
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                    event.Veto()
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        else:
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            event.Skip()
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    def OnFilterChanged(self, event):
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        self.CurrentFilter = self.Filters[self.Filter.GetStringSelection()]
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        self.RefreshTree()
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        event.Skip()
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    def _SelectItem(self, root, parts):
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        if len(parts) == 0:
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            self.Tree.SelectItem(root)
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        else:
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            item, item_cookie = self.Tree.GetFirstChild(root)
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            while item.IsOk():
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                if self.Tree.GetItemText(item) == parts[0]:
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                    if self.Tree.ItemHasChildren(item) and \
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                       not self.Tree.IsExpanded(item):
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                        self.Tree.Expand(item)
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                        wx.CallAfter(self._SelectItem, item, parts[1:])
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                    else:
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                        self._SelectItem(item, parts[1:])
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                    return
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                item, item_cookie = self.Tree.GetNextChild(root, item_cookie)
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    def SetPath(self, path):
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        if path.startswith(self.Folder):
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            root = self.Tree.GetRootItem()
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            if root.IsOk():
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                relative_path = path.replace(os.path.join(self.Folder, ""), "")
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                self._SelectItem(root, splitpath(relative_path))
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    def GetPath(self, item=None):
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        if item is None:
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            item = self.Tree.GetSelection()
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        if item.IsOk():
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            filepath = self.Tree.GetItemText(item)
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            parent = self.Tree.GetItemParent(item)
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            while parent.IsOk() and parent != self.Tree.GetRootItem():
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                filepath = os.path.join(self.Tree.GetItemText(parent), filepath)
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                parent = self.Tree.GetItemParent(parent)
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            return os.path.join(self.Folder, filepath)
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        return self.Folder