Edit book: Add a tool to browse all images in the book with their thumbnails. Useful for visually locating an image. To launch it, use View->Browse images in book.

src/calibre/gui2/tweak_book/boss.py

@@ -106,6 +106,7 @@ class Boss(QObject):
         self.gui.check_book.check_requested.connect(self.check_requested)
         self.gui.check_book.fix_requested.connect(self.fix_requested)
         self.gui.toc_view.navigate_requested.connect(self.link_clicked)
+        self.gui.image_browser.image_activated.connect(self.image_activated)
 
     def preferences(self):
         p = Preferences(self.gui)
@@ -817,6 +818,15 @@ class Boss(QObject):
         replace_file(current_container(), name, path, basename, force_mt)
         self.apply_container_update_to_gui()
 
+    def browse_images(self):
+        self.gui.image_browser.refresh()
+        self.gui.image_browser.show()
+        self.gui.image_browser.raise_()
+
+    def image_activated(self, name):
+        mt = current_container().mime_map.get(name, guess_type(name))
+        self.edit_file_requested(name, None, mt)
+
     def sync_editor_to_preview(self, name, lnum):
         editor = self.edit_file(name, 'html')
         self.ignore_preview_to_editor_sync = True

src/calibre/gui2/tweak_book/editor/insert_resource.py

@@ -12,7 +12,7 @@ from PyQt4.Qt import (
     QDialog, QGridLayout, QDialogButtonBox, QSize, QListView, QStyledItemDelegate,
     QLabel, QPixmap, QApplication, QSizePolicy, QAbstractListModel, QVariant,
     Qt, QRect, QPainter, QModelIndex, QSortFilterProxyModel, QLineEdit,
-    QToolButton, QIcon, QFormLayout)
+    QToolButton, QIcon, QFormLayout, pyqtSignal)
 
 from calibre import fit_image
 from calibre.constants import plugins
@@ -160,12 +160,20 @@ class Images(QAbstractListModel):
     def __init__(self, parent):
         QAbstractListModel.__init__(self, parent)
         self.icon_size = parent.iconSize()
+        self.build()
+
+    def build(self):
         c = current_container()
         self.image_names = []
+        self.image_cache = {}
+        if c is not None:
             for name in sorted(c.mime_map, key=sort_key):
                 if c.mime_map[name].startswith('image/'):
                     self.image_names.append(name)
-        self.image_cache = {}
+
+    def refresh(self):
+        self.build()
+        self.reset()
 
     def rowCount(self, *args):
         return len(self.image_names)
@@ -181,8 +189,12 @@ class Images(QAbstractListModel):
 
 class InsertImage(Dialog):
 
-    def __init__(self, parent=None):
+    image_activated = pyqtSignal(object)
-        Dialog.__init__(self, _('Choose an image'), 'insert-image-dialog', parent)
+
+    def __init__(self, parent=None, for_browsing=False):
+        self.for_browsing = for_browsing
+        Dialog.__init__(self, _('Images in book') if for_browsing else _('Choose an image'),
+                        'browse-image-dialog' if for_browsing else 'insert-image-dialog', parent)
         self.chosen_image = None
         self.chosen_image_is_external = False
 
@@ -196,6 +208,8 @@ class InsertImage(Dialog):
         self.la1 = la = QLabel(_('&Existing images in the book'))
         la.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
         l.addWidget(la, 0, 0, 1, 2)
+        if self.for_browsing:
+            la.setVisible(False)
 
         self.view = v = QListView(self)
         v.setViewMode(v.IconMode)
@@ -212,10 +226,12 @@ class InsertImage(Dialog):
         v.setItemDelegate(self.d)
         self.model = Images(self.view)
         self.fm = fm = QSortFilterProxyModel(self.view)
+        self.fm.setDynamicSortFilter(self.for_browsing)
         fm.setSourceModel(self.model)
         fm.setFilterCaseSensitivity(False)
         v.setModel(fm)
         l.addWidget(v, 1, 0, 1, 2)
+        v.pressed.connect(self.pressed)
         la.setBuddy(v)
 
         self.filter = f = QLineEdit(self)
@@ -228,11 +244,23 @@ class InsertImage(Dialog):
         f.textChanged.connect(self.filter_changed)
 
         l.addWidget(self.bb, 3, 0, 1, 2)
+        if self.for_browsing:
+            self.bb.clear()
+            self.bb.addButton(self.bb.Close)
+            b = self.refresh_button = self.bb.addButton(_('&Refresh'), self.bb.ActionRole)
+            b.clicked.connect(self.refresh)
+            b.setIcon(QIcon(I('view-refresh.png')))
+            b.setToolTip(_('Refresh the displayed images'))
+            self.setAttribute(Qt.WA_DeleteOnClose, False)
+        else:
             b = self.import_button = self.bb.addButton(_('&Import image'), self.bb.ActionRole)
             b.clicked.connect(self.import_image)
             b.setIcon(QIcon(I('view-image.png')))
             b.setToolTip(_('Import an image from elsewhere in your computer'))
 
+    def refresh(self):
+        self.model.refresh()
+
     def import_image(self):
         path = choose_files(self, 'tweak-book-choose-image-for-import', _('Choose Image'),
                             filters=[(_('Images'), ('jpg', 'jpeg', 'png', 'gif', 'svg'))], all_files=True, select_only_single_file=True)
@@ -246,7 +274,13 @@ class InsertImage(Dialog):
                 self.accept()
                 self.chosen_image_is_external = (d.filename, path)
 
+    def pressed(self, index):
+        if QApplication.mouseButtons() & Qt.LeftButton:
+            self.activated(index)
+
     def activated(self, index):
+        if self.for_browsing:
+            return self.image_activated.emit(unicode(index.data().toString()))
         self.chosen_image_is_external = False
         self.accept()
 

src/calibre/gui2/tweak_book/ui.py

@@ -29,11 +29,12 @@ from calibre.gui2.tweak_book.search import SearchPanel
 from calibre.gui2.tweak_book.check import Check
 from calibre.gui2.tweak_book.toc import TOCViewer
 from calibre.gui2.tweak_book.editor.widget import register_text_editor_actions
+from calibre.gui2.tweak_book.editor.insert_resource import InsertImage
 
 def open_donate():
     open_url(QUrl('http://calibre-ebook.com/donate'))
 
-class Central(QStackedWidget):
+class Central(QStackedWidget):  # {{{
 
     ' The central widget, hosts the editors '
 
@@ -164,8 +165,9 @@ class Central(QStackedWidget):
             menu.exec_(self.editor_tabs.tabBar().mapToGlobal(event.pos()))
 
         return True
+# }}}
 
-class CursorPositionWidget(QWidget):
+class CursorPositionWidget(QWidget):  # {{{
 
     def __init__(self, parent):
         QWidget.__init__(self, parent)
@@ -183,6 +185,7 @@ class CursorPositionWidget(QWidget):
             self.la.setText('')
         else:
             self.la.setText(_('Line: {0} : {1}').format(line, col))
+# }}}
 
 class Main(MainWindow):
 
@@ -205,6 +208,7 @@ class Main(MainWindow):
         self.setCentralWidget(self.central)
         self.check_book = Check(self)
         self.toc_view = TOCViewer(self)
+        self.image_browser = InsertImage(self, for_browsing=True)
 
         self.create_actions()
         self.create_toolbars()
@@ -374,6 +378,9 @@ class Main(MainWindow):
         self.action_help = reg(
             'help.png', _('User &Manual'), lambda : open_url(QUrl('http://manual.calibre-ebook.com/edit.html')), 'user-manual', 'F1', _(
                 'Show User Manual'))
+        self.action_browse_images = reg(
+            'view-image.png', _('&Browse images in book'), self.boss.browse_images, 'browse-images', (), _(
+                'Browse images in the books visually'))
 
     def create_menubar(self):
         p, q = self.create_application_menubar()
@@ -423,6 +430,7 @@ class Main(MainWindow):
                 e.addAction(ac)
             elif name.endswith('-bar'):
                 t.addAction(ac)
+        e.addAction(self.action_browse_images)
         e.addSeparator()
         e.addAction(self.action_close_current_tab)
         e.addAction(self.action_close_all_but_current_tab)