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Name	Size	Perms	Modified	Actions
[ .. / .. ]
AutoComplete.py	8.75 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
AutoComplete.pyc	8.01 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
AutoComplete.pyo	8.01 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
AutoCompleteWindow.py	16.91 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
AutoCompleteWindow.pyc	12.45 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
AutoCompleteWindow.pyo	12.39 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
AutoExpand.py	3.32 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
AutoExpand.pyc	3.51 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
AutoExpand.pyo	3.51 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
Bindings.py	2.91 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
Bindings.pyc	4.6 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
Bindings.pyo	4.6 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
CREDITS.txt	1.82 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
CallTipWindow.py	5.92 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
CallTipWindow.pyc	6.17 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
CallTipWindow.pyo	6.17 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
CallTips.py	7.56 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
CallTips.pyc	8.19 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
CallTips.pyo	8.19 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
ChangeLog	55.07 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ClassBrowser.py	6.83 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ClassBrowser.pyc	9.72 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
ClassBrowser.pyo	9.72 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
CodeContext.py	8.15 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
CodeContext.pyc	6.65 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
CodeContext.pyo	6.61 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
ColorDelegator.py	9.53 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ColorDelegator.pyc	8.94 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
ColorDelegator.pyo	8.94 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
Debugger.py	17.81 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
Debugger.pyc	17.81 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
Debugger.pyo	17.81 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
Delegator.py	665 B	-rw-r--r--	2023-02-03 08:01:06	Edit Del
Delegator.pyc	1.33 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
Delegator.pyo	1.33 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
EditorWindow.py	63.96 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
EditorWindow.pyc	57.4 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
EditorWindow.pyo	57.3 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
FileList.py	3.63 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
FileList.pyc	4.09 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
FileList.pyo	4.06 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
FormatParagraph.py	7.12 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
FormatParagraph.pyc	7.17 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
FormatParagraph.pyo	7.17 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
GrepDialog.py	5.02 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
GrepDialog.pyc	6.48 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
GrepDialog.pyo	6.48 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
HISTORY.txt	10.08 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
HyperParser.py	10.25 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
HyperParser.pyc	6.66 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
HyperParser.pyo	6.66 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
IOBinding.py	21.4 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
IOBinding.pyc	18.7 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
IOBinding.pyo	18.7 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
Icons	-	drwxr-xr-x	2023-02-03 08:01:06	Del
IdleHistory.py	3.96 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
IdleHistory.pyc	4.07 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
IdleHistory.pyo	4.07 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
MultiCall.py	17.29 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
MultiCall.pyc	16.47 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
MultiCall.pyo	16.39 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
MultiStatusBar.py	1.32 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
MultiStatusBar.pyc	2.31 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
MultiStatusBar.pyo	2.31 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
NEWS.txt	46.14 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ObjectBrowser.py	4.27 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ObjectBrowser.pyc	7.31 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
ObjectBrowser.pyo	7.31 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
OutputWindow.py	4.47 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
OutputWindow.pyc	5.33 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
OutputWindow.pyo	5.33 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
ParenMatch.py	6.56 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ParenMatch.pyc	7.21 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
ParenMatch.pyo	7.21 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
PathBrowser.py	2.94 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
PathBrowser.pyc	4.6 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
PathBrowser.pyo	4.6 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
Percolator.py	3.15 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
Percolator.pyc	4.72 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
Percolator.pyo	4.54 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
PyParse.py	19.05 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
PyParse.pyc	10.02 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
PyParse.pyo	9.59 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
PyShell.py	57.48 KB	-rwxr-xr-x	2023-02-03 08:01:06	Edit Del
PyShell.pyc	53.21 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
PyShell.pyo	53.11 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
README.txt	7.71 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
RemoteDebugger.py	11.36 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
RemoteDebugger.pyc	16.85 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
RemoteDebugger.pyo	16.7 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
RemoteObjectBrowser.py	942 B	-rw-r--r--	2023-02-03 08:01:06	Edit Del
RemoteObjectBrowser.pyc	2.25 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
RemoteObjectBrowser.pyo	2.25 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
ReplaceDialog.py	6.48 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ReplaceDialog.pyc	7.87 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
ReplaceDialog.pyo	7.87 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
RstripExtension.py	1.03 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
RstripExtension.pyc	1.63 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
RstripExtension.pyo	1.63 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
ScriptBinding.py	8.26 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ScriptBinding.pyc	8.2 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
ScriptBinding.pyo	8.2 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
ScrolledList.py	4.27 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ScrolledList.pyc	6.65 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
ScrolledList.pyo	6.65 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
SearchDialog.py	2.57 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
SearchDialog.pyc	4.07 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
SearchDialog.pyo	4.07 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
SearchDialogBase.py	6.93 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
SearchDialogBase.pyc	8.45 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
SearchDialogBase.pyo	8.45 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
SearchEngine.py	7.29 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
SearchEngine.pyc	8.42 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
SearchEngine.pyo	8.42 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
StackViewer.py	4.33 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
StackViewer.pyc	6.56 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
StackViewer.pyo	6.56 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
TODO.txt	8.28 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ToolTip.py	3.1 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ToolTip.pyc	4.81 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
ToolTip.pyo	4.81 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
TreeWidget.py	14.68 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
TreeWidget.pyc	18.06 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
TreeWidget.pyo	18.06 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
UndoDelegator.py	10.53 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
UndoDelegator.pyc	13.98 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
UndoDelegator.pyo	13.98 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
WidgetRedirector.py	6.74 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
WidgetRedirector.pyc	7.79 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
WidgetRedirector.pyo	7.79 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
WindowList.py	2.42 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
WindowList.pyc	3.77 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
WindowList.pyo	3.77 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
ZoomHeight.py	1.27 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
ZoomHeight.pyc	1.68 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
ZoomHeight.pyo	1.68 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
__init__.py	288 B	-rw-r--r--	2023-02-03 08:01:06	Edit Del
__init__.pyc	446 B	-rw-r--r--	2023-02-03 08:01:08	Edit Del
__init__.pyo	446 B	-rw-r--r--	2023-02-03 08:01:12	Edit Del
aboutDialog.py	6.85 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
aboutDialog.pyc	6.88 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
aboutDialog.pyo	6.88 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
config-extensions.def	2.9 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
config-highlight.def	2.46 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
config-keys.def	7.59 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
config-main.def	2.5 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
configDialog.py	64.41 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
configDialog.pyc	53.33 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
configDialog.pyo	53.33 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
configHandler.py	31.72 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
configHandler.pyc	29.38 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
configHandler.pyo	29.38 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
configHelpSourceEdit.py	6.53 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
configHelpSourceEdit.pyc	6.57 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
configHelpSourceEdit.pyo	6.57 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
configSectionNameDialog.py	3.95 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
configSectionNameDialog.pyc	4.42 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
configSectionNameDialog.pyo	4.42 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
dynOptionMenuWidget.py	1.94 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
dynOptionMenuWidget.pyc	2.81 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
dynOptionMenuWidget.pyo	2.81 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
extend.txt	3.56 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
help.html	41.42 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
help.py	10.78 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
help.pyc	12.29 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
help.pyo	12.29 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
help.txt	11.86 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
idle.bat	177 B	-rwxr-xr-x	2023-02-03 08:01:06	Edit Del
idle.py	453 B	-rw-r--r--	2023-02-03 08:01:06	Edit Del
idle.pyc	425 B	-rw-r--r--	2023-02-03 08:01:08	Edit Del
idle.pyo	425 B	-rw-r--r--	2023-02-03 08:01:12	Edit Del
idle.pyw	563 B	-rw-r--r--	2023-02-03 08:01:06	Edit Del
idle_test	-	drwxr-xr-x	2023-02-03 08:01:12	Del
idlever.py	415 B	-rw-r--r--	2023-02-03 08:01:06	Edit Del
idlever.pyc	593 B	-rw-r--r--	2023-02-03 08:01:08	Edit Del
idlever.pyo	593 B	-rw-r--r--	2023-02-03 08:01:12	Edit Del
keybindingDialog.py	12.18 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
keybindingDialog.pyc	12.11 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
keybindingDialog.pyo	12.11 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
macosxSupport.py	8.24 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
macosxSupport.pyc	8.42 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
macosxSupport.pyo	8.28 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
rpc.py	19.68 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
rpc.pyc	22.08 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
rpc.pyo	21.98 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
run.py	12.61 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
run.pyc	13.5 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
run.pyo	13.44 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
tabbedpages.py	18.01 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
tabbedpages.pyc	18.71 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
tabbedpages.pyo	18.71 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del
textView.py	3.44 KB	-rw-r--r--	2023-02-03 08:01:06	Edit Del
textView.pyc	4.03 KB	-rw-r--r--	2023-02-03 08:01:08	Edit Del
textView.pyo	4.03 KB	-rw-r--r--	2023-02-03 08:01:12	Edit Del

Editing: TreeWidget.py (14.68 KB)

# XXX TO DO:
# - popup menu
# - support partial or total redisplay
# - key bindings (instead of quick-n-dirty bindings on Canvas):
#   - up/down arrow keys to move focus around
#   - ditto for page up/down, home/end
#   - left/right arrows to expand/collapse & move out/in
# - more doc strings
# - add icons for "file", "module", "class", "method"; better "python" icon
# - callback for selection???
# - multiple-item selection
# - tooltips
# - redo geometry without magic numbers
# - keep track of object ids to allow more careful cleaning
# - optimize tree redraw after expand of subnode

import os
from Tkinter import *
import imp

from idlelib import ZoomHeight
from idlelib.configHandler import idleConf

ICONDIR = "Icons"

# Look for Icons subdirectory in the same directory as this module
try:
    _icondir = os.path.join(os.path.dirname(__file__), ICONDIR)
except NameError:
    _icondir = ICONDIR
if os.path.isdir(_icondir):
    ICONDIR = _icondir
elif not os.path.isdir(ICONDIR):
    raise RuntimeError, "can't find icon directory (%r)" % (ICONDIR,)

def listicons(icondir=ICONDIR):
    """Utility to display the available icons."""
    root = Tk()
    import glob
    list = glob.glob(os.path.join(icondir, "*.gif"))
    list.sort()
    images = []
    row = column = 0
    for file in list:
        name = os.path.splitext(os.path.basename(file))[0]
        image = PhotoImage(file=file, master=root)
        images.append(image)
        label = Label(root, image=image, bd=1, relief="raised")
        label.grid(row=row, column=column)
        label = Label(root, text=name)
        label.grid(row=row+1, column=column)
        column = column + 1
        if column >= 10:
            row = row+2
            column = 0
    root.images = images


class TreeNode:

    def __init__(self, canvas, parent, item):
        self.canvas = canvas
        self.parent = parent
        self.item = item
        self.state = 'collapsed'
        self.selected = False
        self.children = []
        self.x = self.y = None
        self.iconimages = {} # cache of PhotoImage instances for icons

    def destroy(self):
        for c in self.children[:]:
            self.children.remove(c)
            c.destroy()
        self.parent = None

    def geticonimage(self, name):
        try:
            return self.iconimages[name]
        except KeyError:
            pass
        file, ext = os.path.splitext(name)
        ext = ext or ".gif"
        fullname = os.path.join(ICONDIR, file + ext)
        image = PhotoImage(master=self.canvas, file=fullname)
        self.iconimages[name] = image
        return image

    def select(self, event=None):
        if self.selected:
            return
        self.deselectall()
        self.selected = True
        self.canvas.delete(self.image_id)
        self.drawicon()
        self.drawtext()

    def deselect(self, event=None):
        if not self.selected:
            return
        self.selected = False
        self.canvas.delete(self.image_id)
        self.drawicon()
        self.drawtext()

    def deselectall(self):
        if self.parent:
            self.parent.deselectall()
        else:
            self.deselecttree()

    def deselecttree(self):
        if self.selected:
            self.deselect()
        for child in self.children:
            child.deselecttree()

    def flip(self, event=None):
        if self.state == 'expanded':
            self.collapse()
        else:
            self.expand()
        self.item.OnDoubleClick()
        return "break"

    def expand(self, event=None):
        if not self.item._IsExpandable():
            return
        if self.state != 'expanded':
            self.state = 'expanded'
            self.update()
            self.view()

    def collapse(self, event=None):
        if self.state != 'collapsed':
            self.state = 'collapsed'
            self.update()

    def view(self):
        top = self.y - 2
        bottom = self.lastvisiblechild().y + 17
        height = bottom - top
        visible_top = self.canvas.canvasy(0)
        visible_height = self.canvas.winfo_height()
        visible_bottom = self.canvas.canvasy(visible_height)
        if visible_top <= top and bottom <= visible_bottom:
            return
        x0, y0, x1, y1 = self.canvas._getints(self.canvas['scrollregion'])
        if top >= visible_top and height <= visible_height:
            fraction = top + height - visible_height
        else:
            fraction = top
        fraction = float(fraction) / y1
        self.canvas.yview_moveto(fraction)

    def lastvisiblechild(self):
        if self.children and self.state == 'expanded':
            return self.children[-1].lastvisiblechild()
        else:
            return self

    def update(self):
        if self.parent:
            self.parent.update()
        else:
            oldcursor = self.canvas['cursor']
            self.canvas['cursor'] = "watch"
            self.canvas.update()
            self.canvas.delete(ALL)     # XXX could be more subtle
            self.draw(7, 2)
            x0, y0, x1, y1 = self.canvas.bbox(ALL)
            self.canvas.configure(scrollregion=(0, 0, x1, y1))
            self.canvas['cursor'] = oldcursor

    def draw(self, x, y):
        # XXX This hard-codes too many geometry constants!
        dy = 20
        self.x, self.y = x, y
        self.drawicon()
        self.drawtext()
        if self.state != 'expanded':
            return y + dy
        # draw children
        if not self.children:
            sublist = self.item._GetSubList()
            if not sublist:
                # _IsExpandable() was mistaken; that's allowed
                return y+17
            for item in sublist:
                child = self.__class__(self.canvas, self, item)
                self.children.append(child)
        cx = x+20
        cy = y + dy
        cylast = 0
        for child in self.children:
            cylast = cy
            self.canvas.create_line(x+9, cy+7, cx, cy+7, fill="gray50")
            cy = child.draw(cx, cy)
            if child.item._IsExpandable():
                if child.state == 'expanded':
                    iconname = "minusnode"
                    callback = child.collapse
                else:
                    iconname = "plusnode"
                    callback = child.expand
                image = self.geticonimage(iconname)
                id = self.canvas.create_image(x+9, cylast+7, image=image)
                # XXX This leaks bindings until canvas is deleted:
                self.canvas.tag_bind(id, "<1>", callback)
                self.canvas.tag_bind(id, "<Double-1>", lambda x: None)
        id = self.canvas.create_line(x+9, y+10, x+9, cylast+7,
            ##stipple="gray50",     # XXX Seems broken in Tk 8.0.x
            fill="gray50")
        self.canvas.tag_lower(id) # XXX .lower(id) before Python 1.5.2
        return cy

    def drawicon(self):
        if self.selected:
            imagename = (self.item.GetSelectedIconName() or
                         self.item.GetIconName() or
                         "openfolder")
        else:
            imagename = self.item.GetIconName() or "folder"
        image = self.geticonimage(imagename)
        id = self.canvas.create_image(self.x, self.y, anchor="nw", image=image)
        self.image_id = id
        self.canvas.tag_bind(id, "<1>", self.select)
        self.canvas.tag_bind(id, "<Double-1>", self.flip)

    def drawtext(self):
        textx = self.x+20-1
        texty = self.y-4
        labeltext = self.item.GetLabelText()
        if labeltext:
            id = self.canvas.create_text(textx, texty, anchor="nw",
                                         text=labeltext)
            self.canvas.tag_bind(id, "<1>", self.select)
            self.canvas.tag_bind(id, "<Double-1>", self.flip)
            x0, y0, x1, y1 = self.canvas.bbox(id)
            textx = max(x1, 200) + 10
        text = self.item.GetText() or "<no text>"
        try:
            self.entry
        except AttributeError:
            pass
        else:
            self.edit_finish()
        try:
            self.label
        except AttributeError:
            # padding carefully selected (on Windows) to match Entry widget:
            self.label = Label(self.canvas, text=text, bd=0, padx=2, pady=2)
        theme = idleConf.CurrentTheme()
        if self.selected:
            self.label.configure(idleConf.GetHighlight(theme, 'hilite'))
        else:
            self.label.configure(idleConf.GetHighlight(theme, 'normal'))
        id = self.canvas.create_window(textx, texty,
                                       anchor="nw", window=self.label)
        self.label.bind("<1>", self.select_or_edit)
        self.label.bind("<Double-1>", self.flip)
        self.text_id = id

    def select_or_edit(self, event=None):
        if self.selected and self.item.IsEditable():
            self.edit(event)
        else:
            self.select(event)

    def edit(self, event=None):
        self.entry = Entry(self.label, bd=0, highlightthickness=1, width=0)
        self.entry.insert(0, self.label['text'])
        self.entry.selection_range(0, END)
        self.entry.pack(ipadx=5)
        self.entry.focus_set()
        self.entry.bind("<Return>", self.edit_finish)
        self.entry.bind("<Escape>", self.edit_cancel)

    def edit_finish(self, event=None):
        try:
            entry = self.entry
            del self.entry
        except AttributeError:
            return
        text = entry.get()
        entry.destroy()
        if text and text != self.item.GetText():
            self.item.SetText(text)
        text = self.item.GetText()
        self.label['text'] = text
        self.drawtext()
        self.canvas.focus_set()

    def edit_cancel(self, event=None):
        try:
            entry = self.entry
            del self.entry
        except AttributeError:
            return
        entry.destroy()
        self.drawtext()
        self.canvas.focus_set()


class TreeItem:

    """Abstract class representing tree items.

    Methods should typically be overridden, otherwise a default action
    is used.

    """

    def __init__(self):
        """Constructor.  Do whatever you need to do."""

    def GetText(self):
        """Return text string to display."""

    def GetLabelText(self):
        """Return label text string to display in front of text (if any)."""

    expandable = None

    def _IsExpandable(self):
        """Do not override!  Called by TreeNode."""
        if self.expandable is None:
            self.expandable = self.IsExpandable()
        return self.expandable

    def IsExpandable(self):
        """Return whether there are subitems."""
        return 1

    def _GetSubList(self):
        """Do not override!  Called by TreeNode."""
        if not self.IsExpandable():
            return []
        sublist = self.GetSubList()
        if not sublist:
            self.expandable = 0
        return sublist

    def IsEditable(self):
        """Return whether the item's text may be edited."""

    def SetText(self, text):
        """Change the item's text (if it is editable)."""

    def GetIconName(self):
        """Return name of icon to be displayed normally."""

    def GetSelectedIconName(self):
        """Return name of icon to be displayed when selected."""

    def GetSubList(self):
        """Return list of items forming sublist."""

    def OnDoubleClick(self):
        """Called on a double-click on the item."""


# Example application

class FileTreeItem(TreeItem):

    """Example TreeItem subclass -- browse the file system."""

    def __init__(self, path):
        self.path = path

    def GetText(self):
        return os.path.basename(self.path) or self.path

    def IsEditable(self):
        return os.path.basename(self.path) != ""

    def SetText(self, text):
        newpath = os.path.dirname(self.path)
        newpath = os.path.join(newpath, text)
        if os.path.dirname(newpath) != os.path.dirname(self.path):
            return
        try:
            os.rename(self.path, newpath)
            self.path = newpath
        except os.error:
            pass

    def GetIconName(self):
        if not self.IsExpandable():
            return "python" # XXX wish there was a "file" icon

    def IsExpandable(self):
        return os.path.isdir(self.path)

    def GetSubList(self):
        try:
            names = os.listdir(self.path)
        except os.error:
            return []
        names.sort(key = os.path.normcase)
        sublist = []
        for name in names:
            item = FileTreeItem(os.path.join(self.path, name))
            sublist.append(item)
        return sublist


# A canvas widget with scroll bars and some useful bindings

class ScrolledCanvas:
    def __init__(self, master, **opts):
        if 'yscrollincrement' not in opts:
            opts['yscrollincrement'] = 17
        self.master = master
        self.frame = Frame(master)
        self.frame.rowconfigure(0, weight=1)
        self.frame.columnconfigure(0, weight=1)
        self.canvas = Canvas(self.frame, **opts)
        self.canvas.grid(row=0, column=0, sticky="nsew")
        self.vbar = Scrollbar(self.frame, name="vbar")
        self.vbar.grid(row=0, column=1, sticky="nse")
        self.hbar = Scrollbar(self.frame, name="hbar", orient="horizontal")
        self.hbar.grid(row=1, column=0, sticky="ews")
        self.canvas['yscrollcommand'] = self.vbar.set
        self.vbar['command'] = self.canvas.yview
        self.canvas['xscrollcommand'] = self.hbar.set
        self.hbar['command'] = self.canvas.xview
        self.canvas.bind("<Key-Prior>", self.page_up)
        self.canvas.bind("<Key-Next>", self.page_down)
        self.canvas.bind("<Key-Up>", self.unit_up)
        self.canvas.bind("<Key-Down>", self.unit_down)
        #if isinstance(master, Toplevel) or isinstance(master, Tk):
        self.canvas.bind("<Alt-Key-2>", self.zoom_height)
        self.canvas.focus_set()
    def page_up(self, event):
        self.canvas.yview_scroll(-1, "page")
        return "break"
    def page_down(self, event):
        self.canvas.yview_scroll(1, "page")
        return "break"
    def unit_up(self, event):
        self.canvas.yview_scroll(-1, "unit")
        return "break"
    def unit_down(self, event):
        self.canvas.yview_scroll(1, "unit")
        return "break"
    def zoom_height(self, event):
        ZoomHeight.zoom_height(self.master)
        return "break"


def _tree_widget(parent):
    root = Tk()
    root.title("Test TreeWidget")
    width, height, x, y = list(map(int, re.split('[x+]', parent.geometry())))
    root.geometry("+%d+%d"%(x, y + 150))
    sc = ScrolledCanvas(root, bg="white", highlightthickness=0, takefocus=1)
    sc.frame.pack(expand=1, fill="both", side=LEFT)
    item = FileTreeItem(os.getcwd())
    node = TreeNode(sc.canvas, None, item)
    node.expand()
    root.mainloop()

if __name__ == '__main__':
    from idlelib.idle_test.htest import run
    run(_tree_widget)