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# (C) Copyright 2005-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
""" Tree example. """
import os
from traits.api import Float, Str
from traits.observation.api import match
from pyface.api import GUI, PythonShell, SplitApplicationWindow
from file_tree import FileTree
class MainWindow(SplitApplicationWindow):
""" The main application window. """
# 'SplitApplicationWindow' interface -----------------------------------
# The ratio of the size of the left/top pane to the right/bottom pane.
ratio = Float(0.3)
# The direction in which the window is split.
direction = Str("vertical")
# ------------------------------------------------------------------------
# Protected 'SplitApplicationWindow' interface.
# ------------------------------------------------------------------------
def _create_lhs(self, parent):
""" Creates the left hand side or top depending on the split. """
self._tree = FileTree(parent, root=os.path.abspath(os.curdir))
self._tree.observe(
self._on_tree_anytrait_changed,
match(lambda name, ctrait: True) # listen to all traits
)
return self._tree.control
def _create_rhs(self, parent):
""" Creates the right hand side or bottom depending on the split. """
self._python_shell = PythonShell(parent)
self._python_shell.bind("widget", self._tree)
self._python_shell.bind("w", self._tree)
return self._python_shell.control
# ------------------------------------------------------------------------
# Private interface.
# ------------------------------------------------------------------------
# Trait event handlers -------------------------------------------------
def _on_tree_anytrait_changed(self, event):
""" Called when any trait on the tree has changed. """
print("trait", event.name, "value", event.new)
return
# Application entry point.
if __name__ == "__main__":
# Create the GUI (this does NOT start the GUI event loop).
gui = GUI()
# Create and open the main window.
window = MainWindow()
window.open()
# Start the GUI event loop.
gui.start_event_loop()
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