You can now change the cover or add formats to the currently selected book by Drag and Drop onto the book information display panel at the bottom. Fixes #3601 (Drag and Drop cover editing in main GUI)

src/calibre/gui2/__init__.py

@@ -124,17 +124,22 @@ class CopyButton(QPushButton):
 
 
     def keyPressEvent(self, ev):
+        try:
             if ev.key() in self.ACTION_KEYS:
                 self.copied()
-        else:
+                return
-            QPushButton.event(self, ev)
+        except:
+            pass
+        return QPushButton.event(self, ev)
 
 
     def keyReleaseEvent(self, ev):
+        try:
             if ev.key() in self.ACTION_KEYS:
+                return
+        except:
             pass
-        else:
+        return QPushButton.event(self, ev)
-            QPushButton.event(self, ev)
 
     def mouseReleaseEvent(self, ev):
         ev.accept()

src/calibre/gui2/main.py

@@ -30,7 +30,7 @@ from calibre.gui2 import APP_UID, warning_dialog, choose_files, error_dialog, \
                            max_available_height, config, info_dialog, \
                            available_width, GetMetadata
 from calibre.gui2.cover_flow import CoverFlow, DatabaseImages, pictureflowerror
-from calibre.gui2.widgets import ProgressIndicator
+from calibre.gui2.widgets import ProgressIndicator, IMAGE_EXTENSIONS
 from calibre.gui2.wizard import move_library
 from calibre.gui2.dialogs.scheduler import Scheduler
 from calibre.gui2.update import CheckForUpdates
@@ -220,6 +220,8 @@ class Main(MainWindow, Ui_MainWindow, DeviceGUI):
                 self.status_bar.job_done, Qt.QueuedConnection)
         QObject.connect(self.status_bar, SIGNAL('show_book_info()'),
                 self.show_book_info)
+        QObject.connect(self.status_bar, SIGNAL('files_dropped(PyQt_PyObject,PyQt_PyObject)'),
+                self.files_dropped_on_book)
         ####################### Setup Toolbar #####################
         md = QMenu()
         md.addAction(_('Edit metadata individually'))
@@ -826,6 +828,31 @@ class Main(MainWindow, Ui_MainWindow, DeviceGUI):
         to_device = self.stack.currentIndex() != 0
         self._add_books(paths, to_device)
 
+    def files_dropped_on_book(self, event, paths):
+        accept = False
+        if self.current_view() is not self.library_view:
+            return
+        db = self.library_view.model().db
+        current_idx = self.library_view.currentIndex()
+        if not current_idx.isValid(): return
+        cid = db.id(current_idx.row())
+        for path in paths:
+            ext = os.path.splitext(path)[1].lower()
+            if ext:
+                ext = ext[1:]
+            if ext in IMAGE_EXTENSIONS:
+                pmap = QPixmap()
+                pmap.load(path)
+                if not pmap.isNull():
+                    accept = True
+                    db.set_cover(cid, pmap)
+            elif ext in BOOK_EXTENSIONS:
+                db.add_format_with_hooks(cid, ext, path, index_is_id=True)
+                accept = True
+        if accept:
+            event.accept()
+            self.cover_cache.refresh([cid])
+            self.library_view.model().current_changed(current_idx, current_idx)
 
     def add_filesystem_book(self, path):
         if os.access(path, os.R_OK):

src/calibre/gui2/status.py

@@ -1,14 +1,48 @@
 __license__   = 'GPL v3'
 __copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
-import re, collections
+import os, re, collections
 
 from PyQt4.QtGui import QStatusBar, QMovie, QLabel, QWidget, QHBoxLayout, QPixmap, \
                         QVBoxLayout, QSizePolicy, QToolButton, QIcon, QScrollArea, QFrame
 from PyQt4.QtCore import Qt, QSize, SIGNAL, QCoreApplication
 from calibre import fit_image, preferred_encoding, isosx
 from calibre.gui2 import qstring_to_unicode, config
+from calibre.gui2.widgets import IMAGE_EXTENSIONS
+from calibre.ebooks import BOOK_EXTENSIONS
 
 class BookInfoDisplay(QWidget):
+
+    DROPABBLE_EXTENSIONS = IMAGE_EXTENSIONS+BOOK_EXTENSIONS
+
+    @classmethod
+    def paths_from_event(cls, event):
+        '''
+        Accept a drop event and return a list of paths that can be read from
+        and represent files with extensions.
+        '''
+        if event.mimeData().hasFormat('text/uri-list'):
+            urls = [unicode(u.toLocalFile()) for u in event.mimeData().urls()]
+            urls = [u for u in urls if os.path.splitext(u)[1] and os.access(u, os.R_OK)]
+            return [u for u in urls if os.path.splitext(u)[1][1:].lower() in cls.DROPABBLE_EXTENSIONS]
+
+    def dragEnterEvent(self, event):
+        if int(event.possibleActions() & Qt.CopyAction) + \
+           int(event.possibleActions() & Qt.MoveAction) == 0:
+            return
+        paths = self.paths_from_event(event)
+        if paths:
+            event.acceptProposedAction()
+
+    def dropEvent(self, event):
+        paths = self.paths_from_event(event)
+        event.setDropAction(Qt.CopyAction)
+        self.emit(SIGNAL('files_dropped(PyQt_PyObject, PyQt_PyObject)'), event,
+            paths)
+
+    def dragMoveEvent(self, event):
+        event.acceptProposedAction()
+
+
     class BookCoverDisplay(QLabel):
 
         WIDTH = 81
@@ -184,15 +218,22 @@ class StatusBar(QStatusBar):
         self.addPermanentWidget(self.tag_view_button)
         self.addPermanentWidget(self.movie_button)
         self.book_info = BookInfoDisplay(self.clearMessage)
+        self.book_info.setAcceptDrops(True)
         self.scroll_area = QScrollArea()
         self.scroll_area.setWidget(self.book_info)
         self.scroll_area.setMaximumHeight(120)
         self.scroll_area.setWidgetResizable(True)
         self.connect(self.book_info, SIGNAL('show_book_info()'), self.show_book_info)
+        self.connect(self.book_info,
+                SIGNAL('files_dropped(PyQt_PyObject,PyQt_PyObject)'),
+                    self.files_dropped, Qt.QueuedConnection)
         self.addWidget(self.scroll_area, 100)
         self.setMinimumHeight(120)
         self.setMaximumHeight(120)
 
+    def files_dropped(self, event, paths):
+        self.emit(SIGNAL('files_dropped(PyQt_PyObject, PyQt_PyObject)'), event,
+            paths)
 
     def reset_info(self):
         self.book_info.show_data({})
@@ -243,7 +284,6 @@ if __name__ == '__main__':
     # Used to create the animated status icon
     from PyQt4.Qt import QApplication, QPainter, QSvgRenderer, QColor
     from subprocess import check_call
-    import os
     app = QApplication([])
 
     def create_pixmaps(path, size=16, delta=20):

src/calibre/gui2/widgets.py

@@ -105,13 +105,13 @@ class FilenamePattern(QWidget, Ui_Form):
         return pat
 
 
-
+IMAGE_EXTENSIONS = ['jpg', 'jpeg', 'gif', 'png', 'bmp']
 
 class ImageView(QLabel):
 
     MAX_WIDTH  = 400
     MAX_HEIGHT = 300
-    DROPABBLE_EXTENSIONS = ('jpg', 'jpeg', 'gif', 'png', 'bmp')
+    DROPABBLE_EXTENSIONS = IMAGE_EXTENSIONS
 
     @classmethod
     def paths_from_event(cls, event):