Implement file drag drop

lector/widgets.py

@@ -666,3 +666,81 @@ class PliantQGraphicsScene(QtWidgets.QGraphicsScene):
 
         self.parent.load_cover(cover_pixmap, True)
         self.parent.show()
+
+
+class DragDropListView(QtWidgets.QListView):
+    # This is the library listview
+    def __init__(self, main_window, parent):
+        super(DragDropListView, self).__init__(parent)
+        self.main_window = main_window
+        self.setAcceptDrops(True)
+        self.setDragDropMode(QtWidgets.QAbstractItemView.InternalMove)
+        self.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
+        self.setResizeMode(QtWidgets.QListView.Fixed)
+        self.setLayoutMode(QtWidgets.QListView.SinglePass)
+        self.setViewMode(QtWidgets.QListView.IconMode)
+        self.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
+        self.setProperty("showDropIndicator", False)
+        self.setProperty("isWrapping", True)
+        self.setFrameShape(QtWidgets.QFrame.NoFrame)
+        self.setUniformItemSizes(True)
+        self.setWordWrap(True)
+        self.setObjectName("listView")
+
+    def dragEnterEvent(self, event):
+        if event.mimeData().hasUrls():
+            event.acceptProposedAction()
+        else:
+            super(DragDropListView, self).dragEnterEvent(event)
+
+    def dragMoveEvent(self, event):
+        super(DragDropListView, self).dragMoveEvent(event)
+
+    def dropEvent(self, event):
+        if event.mimeData().hasUrls():
+            file_list = [url.path() for url in event.mimeData().urls()]
+            self.main_window.process_post_hoc_files(file_list, False)
+            event.acceptProposedAction()
+        else:
+            super(DragDropListView, self).dropEvent(event)
+
+
+class DragDropTableView(QtWidgets.QTableView):
+    # This is the library tableview
+    def __init__(self, main_window, parent):
+        super(DragDropTableView, self).__init__(parent)
+        self.main_window = main_window
+        self.setAcceptDrops(True)
+        self.setDragDropMode(QtWidgets.QAbstractItemView.InternalMove)
+        self.setFrameShape(QtWidgets.QFrame.Box)
+        self.setFrameShadow(QtWidgets.QFrame.Plain)
+        self.setSizeAdjustPolicy(QtWidgets.QAbstractScrollArea.AdjustToContentsOnFirstShow)
+        self.setEditTriggers(
+            QtWidgets.QAbstractItemView.DoubleClicked |
+            QtWidgets.QAbstractItemView.EditKeyPressed |
+            QtWidgets.QAbstractItemView.SelectedClicked)
+        self.setAlternatingRowColors(True)
+        self.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
+        self.setGridStyle(QtCore.Qt.NoPen)
+        self.setSortingEnabled(True)
+        self.setWordWrap(False)
+        self.setObjectName("tableView")
+        self.horizontalHeader().setVisible(True)
+        self.verticalHeader().setVisible(False)
+
+    def dragEnterEvent(self, event):
+        if event.mimeData().hasUrls():
+            event.acceptProposedAction()
+        else:
+            super(DragDropTableView, self).dragEnterEvent(event)
+
+    def dragMoveEvent(self, event):
+        super(DragDropTableView, self).dragMoveEvent(event)
+
+    def dropEvent(self, event):
+        if event.mimeData().hasUrls():
+            file_list = [url.path() for url in event.mimeData().urls()]
+            self.main_window.process_post_hoc_files(file_list, False)
+            event.acceptProposedAction()
+        else:
+            super(DragDropTableView, self).dropEvent(event)