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# Copyright (C) 2010 Canonical
#
# Authors:
# Michael Vogt
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; version 3.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
from gi.repository import Gtk, GObject
from navhistory import NavigationHistory, NavigationItem
from softwarecenter.ui.gtk3.widgets.backforward import BackForwardButton
from softwarecenter.ui.gtk3.widgets.searchentry import SearchEntry
_viewmanager = None # the gobal Viewmanager instance
def get_viewmanager():
return _viewmanager
class ViewManager(GObject.GObject):
__gsignals__ = {
"view-changed" : (GObject.SignalFlags.RUN_LAST,
None,
(GObject.TYPE_PYOBJECT, ),
),
}
def __init__(self, notebook_view, options=None):
GObject.GObject.__init__(self)
self.notebook_view = notebook_view
self.search_entry = SearchEntry()
self.search_entry.connect(
"terms-changed", self.on_search_terms_changed)
self.back_forward = BackForwardButton()
self.back_forward.connect(
"left-clicked", self.on_nav_back_clicked)
self.back_forward.connect(
"right-clicked", self.on_nav_forward_clicked)
self.navhistory = NavigationHistory(self.back_forward, options)
self.all_views = {}
self.view_to_pane = {}
self._globalise_instance()
def _globalise_instance(self):
global _viewmanager
if _viewmanager is not None:
msg = "Only one instance of ViewManager is allowed!"
raise SystemExit(msg)
else:
_viewmanager = self
def on_search_terms_changed(self, widget, new_text):
pane = self.get_current_view_widget()
if hasattr(pane, "on_search_terms_changed"):
pane.on_search_terms_changed(widget, new_text)
return
def on_nav_back_clicked(self, widget):
pane = self.get_current_view_widget()
if hasattr(pane, "on_nav_back_clicked"):
pane.on_nav_back_clicked(widget)
return
def on_nav_forward_clicked(self, widget):
pane = self.get_current_view_widget()
if hasattr(pane, "on_nav_forward_clicked"):
pane.on_nav_forward_clicked(widget)
return
def register(self, pane, view_id):
page_id = self.notebook_view.append_page(
pane, Gtk.Label.new("View %s" % view_id)) # label is for debugging only
self.all_views[view_id] = page_id
self.view_to_pane[view_id] = pane
def get_current_view_widget(self):
current_view = self.get_active_view()
return self.get_view_widget(current_view)
def get_view_id_from_page_id(self, page_id):
for (k, v) in self.all_views.items():
if page_id == v:
return k
def set_active_view(self, view_id):
if not self.all_views:
return
self.emit('view-changed', view_id)
page_id = self.all_views[view_id]
view_widget = self.get_view_widget(view_id)
# it *seems* that this shouldn't be called here if we want the history
# to work, but I'm not familiar with the code, so I'll leave it here
# for the mean time
# view_page = view_widget.get_current_page()
# view_state = view_widget.state
if (self.search_entry.get_text() !=
view_widget.state.search_term):
self.search_entry.set_text_with_no_signal(
view_widget.state.search_term)
# callback = view_widget.get_callback_for_page(view_page,
# view_state)
# nav_item = NavigationItem(self, view_widget, view_page,
# view_state.copy(), callback)
# self.navhistory.append(nav_item)
self.notebook_view.set_current_page(page_id)
if view_widget:
view_widget.init_view()
return view_widget
def get_active_view(self):
page_id = self.notebook_view.get_current_page()
return self.get_view_id_from_page_id(page_id)
def is_active_view(self, view_id):
return view_id == self.get_active_view()
def get_notebook_page_from_view_id(self, view_id):
return self.all_views[view_id]
def get_view_widget(self, view_id):
return self.view_to_pane[view_id]
def get_latest_nav_item(self):
return self.navhistory.stack[-1]
def display_page(self, pane, page, view_state, callback=None):
if callback is None:
callback = pane.get_callback_for_page(page, view_state)
nav_item = NavigationItem(self, pane, page,
view_state.copy(), callback)
self.navhistory.append(nav_item)
text = view_state.search_term
if text != self.search_entry.get_text():
self.search_entry.set_text_with_no_signal(text)
pane.state = view_state
if callback is not None:
callback(page, view_state)
if page is not None:
pane.notebook.set_current_page(page)
if self.get_current_view_widget() != pane:
view_id = None
for view_id, widget in self.view_to_pane.items():
if widget == pane: break
self.set_active_view(view_id)
if (not pane.searchentry or
((hasattr(pane, 'Pages') and
hasattr(pane.Pages, 'DETAILS') and
page == pane.Pages.DETAILS))):
self.search_entry.hide()
else:
self.search_entry.show()
return
def nav_back(self):
self.navhistory.nav_back()
def nav_forward(self):
self.navhistory.nav_forward()
def get_global_searchentry(self):
return self.search_entry
def get_global_backforward(self):
return self.back_forward
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