Merge commit 'qt/master-stable'

Conflicts:
	src/corelib/kernel/qobject.cpp
	src/corelib/tools/qsharedpointer_impl.h
	src/gui/widgets/qdatetimeedit.cpp
	src/gui/widgets/qlinecontrol.cpp
	src/gui/widgets/qlineedit.cpp
	tests/auto/qcssparser/qcssparser.pro
	tests/auto/qicoimageformat/tst_qicoimageformat.cpp
	tests/auto/qmultiscreen/qmultiscreen.pro
	tests/auto/qresourceengine/qresourceengine.pro
	tests/auto/qresourceengine/tst_qresourceengine.cpp
	tests/auto/qscriptv8testsuite/tst_qscriptv8testsuite.cpp

1 files changed, 7 insertions, 1 deletions

diff --git a/src/gui/itemviews/qitemdelegate.cpp b/src/gui/itemviews/qitemdelegate.cpp
index 82d75ba..1d97340 100644
--- a/src/gui/itemviews/qitemdelegate.cpp
+++ b/src/gui/itemviews/qitemdelegate.cpp
@@ -1296,8 +1296,14 @@ bool QItemDelegate::editorEvent(QEvent *event,
         return false;
     }
 
-    Qt::CheckState state = (static_cast<Qt::CheckState>(value.toInt()) == Qt::Checked
+    Qt::CheckState state;
+    if ( flags & Qt::ItemIsTristate ) {
+        state = static_cast<Qt::CheckState>( (value.toInt() + 1) % 3 );
+    } else {
+        state = (static_cast<Qt::CheckState>(value.toInt()) == Qt::Checked
                             ? Qt::Unchecked : Qt::Checked);
+    }
+
     return model->setData(index, state, Qt::CheckStateRole);
 }