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# Copyright (c) 2007, Riverbank Computing Limited.
# 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!
""" Python editor example. """
from traits.api import Instance
from pyface.api import ApplicationWindow, FileDialog, GUI, OK, PythonEditor
from pyface.action.api import (
Action,
FieldAction,
Group,
MenuManager,
MenuBarManager,
ToolBarManager,
)
from pyface.fields.api import ComboField
from pyface.i_python_editor import IPythonEditor
from pyface.toolkit import toolkit_object
class MainWindow(ApplicationWindow):
""" The main application window. """
#: The PythonEditor instance
_editor = Instance(IPythonEditor)
# ------------------------------------------------------------------------
# 'object' interface.
# ------------------------------------------------------------------------
def __init__(self, **traits):
""" Creates a new application window. """
# Base class constructor.
super().__init__(**traits)
# The main editor Widget
self._editor = PythonEditor()
# Add a menu bar.
self.menu_bar_manager = MenuBarManager(
MenuManager(
Group(
Action(
name="&Open...",
accelerator="Ctrl+O",
on_perform=self.on_open_file,
),
Action(
name="&Save",
accelerator="Ctrl+S",
on_perform=self.on_save_file,
),
id="document_group",
),
Action(
name="&Close", accelerator="Ctrl+W", on_perform=self.close
),
name="&File",
)
)
# Add a tool bar if we are using qt - wx has layout issues
if toolkit_object.toolkit.startswith("qt"):
from pygments.styles import STYLE_MAP
styles = list(STYLE_MAP)
self.tool_bar_manager = ToolBarManager(
Group(
Action(name="Open...", on_perform=self.on_open_file),
Action(name="Save", on_perform=self.on_save_file),
Action(name="Close", on_perform=self.close),
id="document_group",
),
Group(
Action(
name="Lines",
style="toggle",
on_perform=self.on_show_line_numbers,
checked=True,
),
FieldAction(
name="Style",
field_type=ComboField,
field_defaults={
"values": styles,
"value": "default",
"tooltip": "Style",
},
on_perform=self.on_style_changed,
),
),
)
# ------------------------------------------------------------------------
# Protected 'IApplication' interface.
# ------------------------------------------------------------------------
def _create_contents(self, parent):
""" Create the editor. """
self._editor.create(parent)
return self._editor.control
def destroy(self):
if self._editor is not None:
self._editor.destroy()
super().destroy()
# ------------------------------------------------------------------------
# Private interface.
# ------------------------------------------------------------------------
def on_open_file(self):
""" Open a new file. """
if self.control:
dlg = FileDialog(parent=self.control, wildcard="*.py")
if dlg.open() == OK:
self._editor.path = dlg.path
def on_save_file(self):
""" Save the file. """
if self.control:
try:
self._editor.save()
except IOError:
# If you are trying to save to a file that doesn't exist,
# open up a FileDialog with a 'save as' action.
dlg = FileDialog(
parent=self.control, action="save as", wildcard="*.py"
)
if dlg.open() == OK:
self._editor.save(dlg.path)
def on_show_line_numbers(self):
self._editor.show_line_numbers = not self._editor.show_line_numbers
def on_style_changed(self, value):
from pygments.styles import get_style_by_name
# XXX surface this to a proper API on the editor widget
# XXX Qt backend only
highlighter = self._editor.control.code.highlighter
highlighter._style = get_style_by_name(value)
highlighter._brushes = {}
highlighter._formats = {}
highlighter.rehighlight()
# Application entry point.
if __name__ == "__main__":
# Create the GUI.
gui = GUI()
# Create and open the main window.
window = MainWindow(size=(800, 600))
window.open()
# Start the GUI event loop!
gui.start_event_loop()
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