Mercurial Repositories > eric / file diff

--- a/Helpviewer/Bookmarks/BookmarksModel.py	Thu Mar 23 18:58:56 2017 +0100
+++ b/Helpviewer/Bookmarks/BookmarksModel.py	Thu Mar 23 19:06:13 2017 +0100
@@ -108,7 +108,7 @@
         idx = self.nodeIndex(node)
         self.dataChanged.emit(idx, idx)
     
-    def removeRows(self, row, count, parent=QModelIndex()):
+    def removeRows(self, row, count, parent=None):
         """
         Public method to remove bookmarks from the model.
         
@@ -117,6 +117,9 @@
         @param parent index of the parent bookmark node (QModelIndex)
         @return flag indicating successful removal (boolean)
         """
+        if parent is None:
+            parent = QModelIndex()
+        
         if row < 0 or count <= 0 or row + count > self.rowCount(parent):
             return False
         
@@ -198,25 +201,31 @@
         
         return None
     
-    def columnCount(self, parent=QModelIndex()):
+    def columnCount(self, parent=None):
         """
         Public method to get the number of columns.
         
         @param parent index of parent (QModelIndex)
         @return number of columns (integer)
         """
+        if parent is None:
+            parent = QModelIndex()
+        
         if parent.column() > 0:
             return 0
         else:
             return len(self.__headers)
     
-    def rowCount(self, parent=QModelIndex()):
+    def rowCount(self, parent=None):
         """
         Public method to determine the number of rows.
         
         @param parent index of parent (QModelIndex)
         @return number of rows (integer)
         """
+        if parent is None:
+            parent = QModelIndex()
+        
         if parent.column() > 0:
             return 0
         
@@ -226,7 +235,7 @@
         itm = parent.internalPointer()
         return len(itm.children())
     
-    def index(self, row, column, parent=QModelIndex()):
+    def index(self, row, column, parent=None):
         """
         Public method to get a model index for a node cell.
         
@@ -235,6 +244,9 @@
         @param parent index of the parent (QModelIndex)
         @return index (QModelIndex)
         """
+        if parent is None:
+            parent = QModelIndex()
+        
         if row < 0 or column < 0 or \
            row >= self.rowCount(parent) or column >= self.columnCount(parent):
             return QModelIndex()
@@ -242,14 +254,14 @@
         parentNode = self.node(parent)
         return self.createIndex(row, column, parentNode.children()[row])
     
-    def parent(self, index=QModelIndex()):
+    def parent(self, index=None):
         """
         Public method to get the index of the parent node.
         
         @param index index of the child node (QModelIndex)
         @return index of the parent node (QModelIndex)
         """
-        if not index.isValid():
+        if index is None or not index.isValid():
             return QModelIndex()
         
         itemNode = self.node(index)
@@ -267,14 +279,14 @@
         parentRow = grandParentNode.children().index(parentNode)
         return self.createIndex(parentRow, 0, parentNode)
     
-    def hasChildren(self, parent=QModelIndex()):
+    def hasChildren(self, parent=None):
         """
         Public method to check, if a parent node has some children.
         
         @param parent index of the parent node (QModelIndex)
         @return flag indicating the presence of children (boolean)
         """
-        if not parent.isValid():
+        if parent is None or not parent.isValid():
             return True
         
         from .BookmarkNode import BookmarkNode