Show the table of contents in a panel

The table of contents, actually implemented in epub backend,
is displayed in a later panel, instead of in a combo,
to do easier the interaction with touch, and provide context.
The code is now more general to allow the implementation
in the pdf backend too.
The button used to display the table of contents, was moved
from the main toolbar to the view subtoolbar.

Signed-off-by: Gonzalo Odiard <gonzalo@laptop.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/readtoolbar.py b/readtoolbar.py
index 58baebc..737c55d 100644
--- a/readtoolbar.py
+++ b/readtoolbar.py
@@ -22,6 +22,7 @@ from gi.repository import Gtk
 from gi.repository import Gdk
 
 from sugar3.graphics.toolbutton import ToolButton
+from sugar3.graphics.toggletoolbutton import ToggleToolButton
 from sugar3.graphics import iconentry
 from sugar3.activity.widgets import EditToolbar as BaseEditToolbar
 
@@ -164,6 +165,8 @@ class ViewToolbar(Gtk.Toolbar):
     __gsignals__ = {
         'go-fullscreen': (GObject.SignalFlags.RUN_FIRST, GObject.TYPE_NONE,
                 ([])),
+        'toggle-index-show': (GObject.SignalFlags.RUN_FIRST, GObject.TYPE_NONE,
+                ([bool])),
     }
 
     def __init__(self):
@@ -171,6 +174,15 @@ class ViewToolbar(Gtk.Toolbar):
 
         self._view = None
 
+        self._navigator_button = ToggleToolButton('view-list')
+        self._navigator_button.set_tooltip(_('Table of contents'))
+        self._navigator_button.connect('toggled', self.__navigator_toggled_cb)
+        self.insert(self._navigator_button, -1)
+
+        self._spacer_navigator = Gtk.SeparatorToolItem()
+        self._spacer_navigator.props.draw = False
+        self.insert(self._spacer_navigator, -1)
+
         self._zoom_out = ToolButton('zoom-out')
         self._zoom_out.set_tooltip(_('Zoom out'))
         self._zoom_out.connect('clicked', self._zoom_out_cb)
@@ -218,6 +230,10 @@ class ViewToolbar(Gtk.Toolbar):
         self._view = view
         self._update_zoom_buttons()
 
+    def show_nav_button(self):
+        self._navigator_button.show()
+        self._spacer_navigator.show()
+
     def zoom_in(self):
         self._view.zoom_in()
         self._update_zoom_buttons()
@@ -239,6 +255,9 @@ class ViewToolbar(Gtk.Toolbar):
     def _zoom_to_width_cb(self, button):
         self.zoom_to_width()
 
+    def __navigator_toggled_cb(self, button):
+        self.emit('toggle-index-show', button.get_active())
+
     def _update_zoom_buttons(self):
         self._zoom_in.props.sensitive = self._view.can_zoom_in()
         self._zoom_out.props.sensitive = self._view.can_zoom_out()