1 files changed, 86 insertions, 0 deletions
diff --git a/src/kitemviews/kitemlistsizehintresolver.cpp b/src/kitemviews/kitemlistsizehintresolver.cpp
new file mode 100644
index 000000000..00eb79bdd
--- /dev/null
+++ b/src/kitemviews/kitemlistsizehintresolver.cpp
@@ -0,0 +1,86 @@
+/***************************************************************************
+ *   Copyright (C) 2011 by Peter Penz <[email protected]>             *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
+ ***************************************************************************/
+
+#include "kitemlistsizehintresolver_p.h"
+
+#include <kitemviews/kitemlistview.h>
+#include <KDebug>
+
+KItemListSizeHintResolver::KItemListSizeHintResolver(const KItemListView* itemListView) :
+    m_itemListView(itemListView),
+    m_sizeHintCache()
+{
+}
+
+KItemListSizeHintResolver::~KItemListSizeHintResolver()
+{
+}
+
+QSizeF KItemListSizeHintResolver::sizeHint(int index) const
+{
+    QSizeF size = m_sizeHintCache.at(index);
+    if (size.isEmpty()) {
+        size = m_itemListView->itemSizeHint(index);
+        m_sizeHintCache[index] = size;
+    }
+    return size;
+}
+
+void KItemListSizeHintResolver::itemsInserted(int index, int count)
+{
+    const int currentCount = m_sizeHintCache.count();
+    m_sizeHintCache.reserve(currentCount + count);
+    while (count > 0) {
+        m_sizeHintCache.insert(index, QSizeF());
+        ++index;
+        --count;
+    }
+}
+
+void KItemListSizeHintResolver::itemsRemoved(int index, int count)
+{
+    const QList<QSizeF>::iterator begin = m_sizeHintCache.begin() + index;
+    const QList<QSizeF>::iterator end = begin + count;
+    m_sizeHintCache.erase(begin, end);
+}
+
+void KItemListSizeHintResolver::itemsMoved(int from, int to, int count)
+{
+    Q_UNUSED(from);
+    Q_UNUSED(to);
+    Q_UNUSED(count);
+}
+
+void KItemListSizeHintResolver::itemsChanged(int index, int count, const QSet<QByteArray>& roles)
+{
+    Q_UNUSED(roles);
+    while (count) {
+        m_sizeHintCache[index] = QSizeF();
+        ++index;
+        --count;
+    }
+}
+
+void KItemListSizeHintResolver::clearCache()
+{
+    const int count = m_sizeHintCache.count();
+    for (int i = 0; i < count; ++i) {
+        m_sizeHintCache[i] = QSizeF();
+    }
+}