added invert_selection func.

Author: jchanvfx

NodeGraphQt/base/graph.py

@@ -1550,6 +1550,18 @@ def clear_selection(self):
         [node.set_selected(False) for node in self.all_nodes()]
         self._undo_stack.endMacro()
 
+    def invert_selection(self):
+        """
+        Inverts the current node selection.
+        """
+        if not self.selected_nodes():
+            self.select_all()
+            return
+        self._undo_stack.beginMacro('invert selection')
+        for node in self.all_nodes():
+            node.set_selected(not node.selected())
+        self._undo_stack.endMacro()
+
     def get_node_by_id(self, node_id=None):
         """
         Returns the node from the node id string.

examples/hotkeys/hotkey_functions.py

@@ -164,6 +164,13 @@ def clear_node_selection(graph):
     graph.clear_selection()
 
 
+def invert_node_selection(graph):
+    """
+    Invert node selection.
+    """
+    graph.invert_selection()
+
+
 def disable_nodes(graph):
     """
     Toggle disable on selected nodes.

examples/hotkeys/hotkeys.json

@@ -98,6 +98,12 @@
         "file":"../examples/hotkeys/hotkey_functions.py",
         "function_name":"clear_node_selection",
         "shortcut":"Ctrl+Shift+A"
+      },
+            {
+        "type":"command",
+        "label":"Invert Selection",
+        "file":"../examples/hotkeys/hotkey_functions.py",
+        "function_name":"invert_node_selection"
       },
       {
         "type":"command",