added right-click menu for deleting all/selected list items

grum/dictlist/dictlistwidget.py

@@ -2,6 +2,7 @@ from PyQt5.QtCore import Qt
 from PyQt5.QtWidgets import QListWidget
 
 from .dictlistitem import DictListItem
+from ..rclickmenu import RClickMenu
 
 
 class DictListWidget(QListWidget):
@@ -9,6 +10,29 @@ class DictListWidget(QListWidget):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.items = {}
+        self._add_menu()
+
+
+    def _add_menu(self):
+        self.menu = menu = RClickMenu(self)
+        menu.addAction("delete selected", self.delete_selected)
+        menu.addAction("delete all",      self.delete_all)
+
+    def delete_selected(self):
+        selected = self.selectedItems()
+        for i in selected:
+            self.items.pop(i.key)
+            self.deleteItem(i)
+
+    def deleteItem(self, itm):
+        index = self.indexFromItem(itm)
+        row = index.row()
+        self.takeItem(row)
+
+    def delete_all(self):
+        self.items.clear()
+        super().clear()
+
 
     def get(self, key):
         return self.items[key]

grum/rclickmenu.py

@@ -0,0 +1,23 @@
+from PyQt5.QtCore import Qt, QPoint
+from PyQt5.QtWidgets import QMenu, QAction
+from PyQt5.QtGui import QCursor
+
+
+class RClickMenu:
+
+    def __init__(self, obj):
+        self.obj = obj
+        self.menu = QMenu()
+        obj.setContextMenuPolicy(Qt.CustomContextMenu)
+        obj.customContextMenuRequested[QPoint].connect(self.on_show)
+
+    def on_show(self):
+        pos = QCursor.pos()
+        self.menu.exec(pos)
+
+    def addAction(self, name, func):
+        action = QAction(name, triggered=func, parent=self.obj) # here, parent needs to be set
+        self.menu.addAction(action)
+
+
+