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"""
Copyright 2008, 2009, 2011 Free Software Foundation, Inc.
This file is part of GNU Radio
GNU Radio Companion 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; either version 2
of the License, or (at your option) any later version.
GNU Radio Companion 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 __future__ import absolute_import
import os
import logging
from gi.repository import Gtk, Gdk, GObject
from . import Actions
from .StateCache import StateCache
from .Constants import MIN_WINDOW_WIDTH, MIN_WINDOW_HEIGHT
from .DrawingArea import DrawingArea
log = logging.getLogger(__name__)
class Notebook(Gtk.Notebook):
def __init__(self):
Gtk.Notebook.__init__(self)
log.debug("notebook()")
self.app = Gtk.Application.get_default()
self.current_page = None
self.set_show_border(False)
self.set_scrollable(True)
self.connect('switch-page', self._handle_page_change)
self.add_events(Gdk.EventMask.SCROLL_MASK)
self.connect('scroll-event', self._handle_scroll)
self._ignore_consecutive_scrolls = 0
def _handle_page_change(self, notebook, page, page_num):
"""
Handle a page change. When the user clicks on a new tab,
reload the flow graph to update the vars window and
call handle states (select nothing) to update the buttons.
Args:
notebook: the notebook
page: new page
page_num: new page number
"""
self.current_page = self.get_nth_page(page_num)
Actions.PAGE_CHANGE()
def _handle_scroll(self, widget, event):
# Not sure how to handle this at the moment.
natural = True
# Slow it down
if self._ignore_consecutive_scrolls == 0:
if event.direction in (Gdk.ScrollDirection.UP, Gdk.ScrollDirection.LEFT):
if natural:
self.prev_page()
else:
self.next_page()
elif event.direction in (Gdk.ScrollDirection.DOWN, Gdk.ScrollDirection.RIGHT):
if natural:
self.next_page()
else:
self.prev_page()
self._ignore_consecutive_scrolls = 3
else:
self._ignore_consecutive_scrolls -= 1
return False
class Page(Gtk.HBox):
"""A page in the notebook."""
def __init__(self, main_window, flow_graph, file_path=''):
"""
Page constructor.
Args:
main_window: main window
file_path: path to a flow graph file
"""
Gtk.HBox.__init__(self)
self.main_window = main_window
self.flow_graph = flow_graph
self.file_path = file_path
self.process = None
self.saved = True
# import the file
initial_state = flow_graph.parent_platform.parse_flow_graph(file_path)
flow_graph.import_data(initial_state)
self.state_cache = StateCache(initial_state)
# tab box to hold label and close button
self.label = Gtk.Label()
image = Gtk.Image.new_from_icon_name('window-close', Gtk.IconSize.MENU)
image_box = Gtk.HBox(homogeneous=False, spacing=0)
image_box.pack_start(image, True, False, 0)
button = Gtk.Button()
button.connect("clicked", self._handle_button)
button.set_relief(Gtk.ReliefStyle.NONE)
button.add(image_box)
tab = self.tab = Gtk.HBox(homogeneous=False, spacing=0)
tab.pack_start(self.label, False, False, 0)
tab.pack_start(button, False, False, 0)
tab.show_all()
# setup scroll window and drawing area
self.drawing_area = DrawingArea(flow_graph)
flow_graph.drawing_area = self.drawing_area
self.scrolled_window = Gtk.ScrolledWindow()
self.scrolled_window.set_size_request(MIN_WINDOW_WIDTH, MIN_WINDOW_HEIGHT)
self.scrolled_window.set_policy(Gtk.PolicyType.ALWAYS, Gtk.PolicyType.ALWAYS)
self.scrolled_window.add(self.drawing_area)
self.pack_start(self.scrolled_window, True, True, 0)
self.show_all()
def get_generator(self):
"""
Get the generator object for this flow graph.
Returns:
generator
"""
platform = self.flow_graph.parent_platform
return platform.Generator(self.flow_graph, self.file_path)
def _handle_button(self, button):
"""
The button was clicked.
Make the current page selected, then close.
Args:
the: button
"""
self.main_window.page_to_be_closed = self
Actions.FLOW_GRAPH_CLOSE()
def set_markup(self, markup):
"""
Set the markup in this label.
Args:
markup: the new markup text
"""
self.label.set_markup(markup)
def get_read_only(self):
"""
Get the read-only state of the file.
Always false for empty path.
Returns:
true for read-only
"""
if not self.file_path:
return False
return (os.path.exists(self.file_path) and
not os.access(self.file_path, os.W_OK))
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