X-Git-Url: https://git.quassel-irc.org/?a=blobdiff_plain;f=src%2Fuisupport%2Fbufferview.cpp;h=f5db3e29c25b4ee8777fd4c5a333d02cae9bf3d3;hb=082cb8c8eb6db90cbb2166a0098874e76d5c6ad9;hp=9711755807bdd09e31ca10e9ce565513fdaabe52;hpb=c1cf157116de7fc3da96203aa6f03c38c7ebb650;p=quassel.git

diff --git a/src/uisupport/bufferview.cpp b/src/uisupport/bufferview.cpp
index 97117558..f5db3e29 100644
--- a/src/uisupport/bufferview.cpp
+++ b/src/uisupport/bufferview.cpp
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2005-2018 by the Quassel Project                        *
+ *   Copyright (C) 2005-2020 by the Quassel Project                        *
  *   devel@quassel-irc.org                                                 *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
@@ -493,14 +493,18 @@ void BufferView::changeBuffer(Direction direction)
             QModelIndex newParent = currentIndex.sibling(currentIndex.row() - 1, 0);
             if (currentIndex.row() == 0)
                 newParent = lastNetIndex;
-            if (model()->hasChildren(newParent))
-                resultingIndex = newParent.child(model()->rowCount(newParent) - 1, 0);
+            if (model()->hasChildren(newParent)) {
+                // Treat an invalid QAbstractItemModel as an invalid QModelIndex
+                resultingIndex = (newParent.model() ? newParent.model()->index(model()->rowCount(newParent) - 1, 0, newParent) : QModelIndex());
+            }
             else
                 resultingIndex = newParent;
         }
         else {
-            if (model()->hasChildren(currentIndex))
-                resultingIndex = currentIndex.child(0, 0);
+            if (model()->hasChildren(currentIndex)) {
+                // Treat an invalid QAbstractItemModel as an invalid QModelIndex
+                resultingIndex = (currentIndex.model() ? currentIndex.model()->index(0, 0, currentIndex) : QModelIndex());
+            }
             else
                 resultingIndex = currentIndex.sibling(currentIndex.row() + 1, 0);
         }
@@ -509,8 +513,10 @@ void BufferView::changeBuffer(Direction direction)
     if (!resultingIndex.isValid()) {
         if (direction == Forward)
             resultingIndex = model()->index(0, 0, QModelIndex());
-        else
-            resultingIndex = lastNetIndex.child(model()->rowCount(lastNetIndex) - 1, 0);
+        else {
+            // Assume model is valid
+            resultingIndex = lastNetIndex.model()->index(model()->rowCount(lastNetIndex) - 1, 0, lastNetIndex);
+        }
     }
 
     selectionModel()->setCurrentIndex(resultingIndex, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
@@ -575,24 +581,6 @@ void BufferView::filterTextChanged(const QString& filterString)
     on_configChanged();  // make sure collapsation is correct
 }
 
-QSize BufferView::sizeHint() const
-{
-    return TreeViewTouch::sizeHint();
-
-    if (!model())
-        return TreeViewTouch::sizeHint();
-
-    if (model()->rowCount() == 0)
-        return {120, 50};
-
-    int columnSize = 0;
-    for (int i = 0; i < model()->columnCount(); i++) {
-        if (!isColumnHidden(i))
-            columnSize += sizeHintForColumn(i);
-    }
-    return {columnSize, 50};
-}
-
 void BufferView::changeHighlight(BufferView::Direction direction)
 {
     // If for some weird reason we get a new delegate