refs #674, code for hover/drop indicator

* item delegate for callback to view for hover
* proxy style for draw drop indicator as primitive
* added functions to view base for hover / callbacks
* highlight hover row in model

src/blackgui/views/viewbaseitemdelegate.cpp

@@ -0,0 +1,34 @@
+/* Copyright (C) 2016
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "viewbaseitemdelegate.h"
+#include "viewbase.h"
+
+namespace BlackGui
+{
+    namespace Views
+    {
+        void CViewBaseItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
+        {
+            const bool isMouseOver = option.state & QStyle::State_MouseOver;
+            viewBase()->mouseOverCallback(index, isMouseOver);
+            QStyledItemDelegate::paint(painter, option, index);
+        }
+
+        QSize CViewBaseItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
+        {
+            return QStyledItemDelegate::sizeHint(option, index);
+        }
+
+        CViewBaseNonTemplate *CViewBaseItemDelegate::viewBase() const
+        {
+            return qobject_cast<CViewBaseNonTemplate *>(this->parent());
+        }
+    } // namespace
+} // namespace