[ocrfeeder: 3/15] Implement select next/previous page

[Joaquim Manuel Pereira Rocha <jrocha src gnome org>]

commit 0ecf391c5d677febd5bd19467e291edc1251f897
Author: Joaquim Rocha <jrocha igalia com>
Date:   Tue Oct 2 23:06:57 2012 +0200

    Implement select next/previous page

 src/ocrfeeder/studio/studioBuilder.py   |    8 ++++++++
 src/ocrfeeder/studio/widgetModeler.py   |   23 +++++++++++++++++++++++
 src/ocrfeeder/studio/widgetPresenter.py |    4 ++++
 3 files changed, 35 insertions(+), 0 deletions(-)
---
diff --git a/src/ocrfeeder/studio/studioBuilder.py b/src/ocrfeeder/studio/studioBuilder.py
index ea3ad13..95f9e9f 100644
--- a/src/ocrfeeder/studio/studioBuilder.py
+++ b/src/ocrfeeder/studio/studioBuilder.py
@@ -110,6 +110,8 @@ class Studio:
                                  'copy_to_clipboard': self.source_images_controler.copyRecognizedTextToClipboard,
                                  'spell_checker': self.spellChecker,
                                  'help_contents': self.showHelpContents,
+                                 'select_next_page': self.selectNextPage,
+                                 'select_previous_page': self.selectPreviousPage,
                                  }
 
         self.main_window.setHeader(menubar_callback_dict, toolbar_callback_dict)
@@ -355,6 +357,12 @@ class Studio:
             self.source_images_icon_view.deleteCurrentSelection()
         delete_dialog.destroy()
 
+    def selectNextPage(self, widget):
+        self.source_images_icon_view.selectPageFromOffset(1)
+
+    def selectPreviousPage(self, widget):
+        self.source_images_icon_view.selectPageFromOffset(-1)
+
     def __addImagesToReviewer(self, images):
         if not images:
             return
diff --git a/src/ocrfeeder/studio/widgetModeler.py b/src/ocrfeeder/studio/widgetModeler.py
index 6fccab3..f21f103 100644
--- a/src/ocrfeeder/studio/widgetModeler.py
+++ b/src/ocrfeeder/studio/widgetModeler.py
@@ -150,6 +150,29 @@ class SourceImagesSelectorIconView(gtk.IconView):
     def clear(self):
         self.get_model().clear()
 
+    def _getIndexFromOffset(self, offset):
+        selected_items = self.get_selected_items()
+        if not len(selected_items):
+            return
+        selected_item_path = selected_items[0]
+        model = self.get_model()
+        iter = model.get_iter(selected_item_path)
+        index = model.get_path(iter)[0] + offset
+        number_of_items = model.iter_n_children(None)
+        if index < 0:
+            index = number_of_items + offset
+        elif index == number_of_items:
+            index = 0
+        return index
+
+    def selectPageFromOffset(self, offset):
+        selected_items = self.get_selected_items()
+        if not len(selected_items):
+            return
+        selected_item_path = selected_items[0]
+        model = self.get_model()
+        index = self._getIndexFromOffset(offset)
+        self.select_path((index,))
 
 class ImageReviewer(gtk.HPaned):
 
diff --git a/src/ocrfeeder/studio/widgetPresenter.py b/src/ocrfeeder/studio/widgetPresenter.py
index c8e1dc3..4b808ba 100644
--- a/src/ocrfeeder/studio/widgetPresenter.py
+++ b/src/ocrfeeder/studio/widgetPresenter.py
@@ -69,6 +69,8 @@ class MainWindow:
             <separator/>
             <menuitem action="EditPage"/>
             <menuitem action="DeletePage"/>
+            <menuitem action="SelectNextPage"/>
+            <menuitem action="SelectPreviousPage"/>
             <separator/>
             <menuitem action="ClearProject"/>
             <separator/>
@@ -168,6 +170,8 @@ class MainWindow:
                                   ('EditPage', gtk.STOCK_EDIT, _('_Edit Page'), None, _('Edit page settings'), menu_items['edit_page']),
                                   ('Preferences', gtk.STOCK_PREFERENCES, _('_Preferences'), None, _('Configure the application'), menu_items['preferences']),
                                   ('DeletePage', gtk.STOCK_DELETE, _('_Delete Page'), None, _('Delete current page'), menu_items['delete_page']),
+                                  ('SelectNextPage', gtk.STOCK_GO_DOWN, _('Select Next Page'), '<control>Page_Down', _('Select next page'), menu_items['select_next_page']),
+                                  ('SelectPreviousPage', gtk.STOCK_GO_UP, _('Select Previous Page'), '<control>Page_Up', _('Select previous page'), menu_items['select_previous_page']),
                                   ('ClearProject', gtk.STOCK_DELETE, _('_Clear Project'), None, _('Delete all images'), menu_items['clear']),
                                   ('View', None, _('_View')),
                                   ('ZoomIn', gtk.STOCK_ZOOM_IN, _('Zoom In'), '<control>plus', _("Zoom In"), menu_items['zoom_in']),