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#------------------------------------------------------------------------------
# Copyright (c) 2005, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/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!
#
# Author: Enthought, Inc.
# Description: <Enthought pyface package component>
#------------------------------------------------------------------------------
""" The preference dialog. """
# Major package imports.
import wx
# Enthought library imports.
from enthought.pyface.api import HeadingText, LayeredPanel, SplitDialog
from enthought.pyface.util.font_helper import new_font_like
from enthought.pyface.viewer.api import TreeViewer, DefaultTreeContentProvider
from enthought.traits.api import Any, Dict, Float, Instance, Str
# Local imports.
from preference_node import PreferenceNode
class PreferenceDialog(SplitDialog):
""" The preference dialog. """
#### 'Dialog' interface ###################################################
# The dialog title.
title = Str('Preferences')
#### 'SplitDialog' interface ##############################################
# The ratio of the size of the left/top pane to the right/bottom pane.
ratio = Float(0.25)
#### 'PreferenceDialog' interface #########################################
# The root of the preference hierarchy.
root = Instance(PreferenceNode)
#### Private interface ####################################################
# The preference pages in the dialog (they are created lazily).
_pages = Dict
# The current visible preference page.
_current_page = Any
###########################################################################
# Protected 'Dialog' interface.
###########################################################################
def _create_buttons(self, parent):
""" Creates the buttons. """
sizer = wx.BoxSizer(wx.HORIZONTAL)
# 'Done' button.
done = wx.Button(parent, wx.ID_OK, "Done")
done.SetDefault()
wx.EVT_BUTTON(parent, wx.ID_OK, self._on_ok)
sizer.Add(done)
return sizer
###########################################################################
# Protected 'SplitDialog' interface.
###########################################################################
def _create_lhs(self, parent):
""" Creates the panel containing the preference page tree. """
return self._create_tree(parent)
def _create_rhs(self, parent):
""" Creates the panel containing the selected preference page. """
panel = wx.Panel(parent, -1, style=wx.CLIP_CHILDREN)
sizer = wx.BoxSizer(wx.VERTICAL)
panel.SetSizer(sizer)
panel.SetAutoLayout(True)
# The 'pretty' title bar ;^)
self.__title = HeadingText(panel)
sizer.Add(
self.__title.control, 0,
wx.EXPAND | wx.BOTTOM | wx.LEFT | wx.RIGHT, 5
)
# The preference page of the node currently selected in the tree.
self._layered_panel = LayeredPanel(panel, min_width=-1, min_height=-1)
sizer.Add(
self._layered_panel.control, 1,
wx.EXPAND | wx.TOP | wx.LEFT | wx.RIGHT, 5
)
# The 'Restore Defaults' button etc.
buttons = self._create_page_buttons(panel)
sizer.Add(buttons, 0, wx.ALIGN_RIGHT | wx.TOP | wx.RIGHT, 5)
# A separator.
line = wx.StaticLine(panel, -1)
sizer.Add(line, 0, wx.EXPAND | wx.TOP | wx.LEFT | wx.RIGHT, 5)
# Resize the panel to fit the sizer's minimum size.
sizer.Fit(panel)
return panel
###########################################################################
# Private interface.
###########################################################################
def _create_tree(self, parent):
""" Creates the preference page tree. """
tree_viewer = TreeViewer(
parent,
input = self.root,
show_images = False,
show_root = False,
content_provider = DefaultTreeContentProvider()
)
tree_viewer.on_trait_change(self._on_selection_changed, 'selection')
return tree_viewer.control
def _create_page_buttons(self, parent):
""" Creates the 'Restore Defaults' button, etc.
At the moment the "etc." is an optional 'Help' button.
"""
self._button_sizer = sizer = wx.BoxSizer(wx.HORIZONTAL)
# 'Help' button. Comes first so 'Restore Defaults' doesn't jump around.
self._help = help = wx.Button(parent, -1, "Help")
wx.EVT_BUTTON(parent, help.GetId(), self._on_help)
sizer.Add(help, 0, wx.RIGHT, 5)
# 'Restore Defaults' button.
restore = wx.Button(parent, -1, "Restore Defaults")
wx.EVT_BUTTON(parent, restore.GetId(), self._on_restore_defaults)
sizer.Add(restore)
return sizer
###########################################################################
# wx event handlers.
###########################################################################
def _on_restore_defaults(self, event):
""" Called when the 'Restore Defaults' button is pressed. """
page = self._pages[self._layered_panel.current_layer_name]
page.restore_defaults()
return
def _on_help(self, event):
""" Called when the 'Help' button is pressed. """
page = self._pages[self._layered_panel.current_layer_name]
page.show_help_topic()
return
###########################################################################
# Trait event handlers.
###########################################################################
def _on_selection_changed(self, selection):
""" Called when a node in the tree is selected. """
if len(selection) > 0:
# The tree is in single selection mode.
node = selection[0]
# We only show the help button if the selected node has a help
# topic Id.
if len(node.help_id) > 0:
self._button_sizer.Show(self._help, True)
else:
self._button_sizer.Show(self._help, False)
# Show the selected preference page.
layered_panel = self._layered_panel
parent = self._layered_panel.control
# If we haven't yet displayed the node's preference page during the
# lifetime of this dialog, then we have to create it.
if not layered_panel.has_layer(node.name):
page = node.create_page()
layered_panel.add_layer(node.name, page.create_control(parent))
self._pages[node.name] = page
layered_panel.show_layer(node.name)
self.__title.text = node.name
return
#### EOF ######################################################################
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