Provide basic rubberband functionality

This is just a rough draft: The rubberband gets visible and an
automatic scrolling is done if the autoscroll-margins have been
reached. However currently no items get selected yet. Currently
the autoscrolling has a severe bug if the scrollbars are manually
changed before or after a rubberband selection.

1 files changed, 80 insertions, 0 deletions

diff --git a/src/kitemviews/kitemlistrubberband.cpp b/src/kitemviews/kitemlistrubberband.cpp
new file mode 100644
index 000000000..b8605a7a1
--- /dev/null
+++ b/src/kitemviews/kitemlistrubberband.cpp
@@ -0,0 +1,80 @@
+/***************************************************************************
+ *   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 "kitemlistrubberband_p.h"
+
+KItemListRubberBand::KItemListRubberBand(QObject* parent) :
+    QObject(parent),
+    m_active(false),
+    m_startPos(),
+    m_endPos()
+{
+}
+
+KItemListRubberBand::~KItemListRubberBand()
+{
+}
+
+void KItemListRubberBand::setStartPosition(const QPointF& pos)
+{
+    if (m_startPos != pos) {
+        const QPointF previous = m_startPos;
+        m_startPos = pos;
+        emit startPositionChanged(m_startPos, previous);
+    }
+}
+
+QPointF KItemListRubberBand::startPosition() const
+{
+    return m_startPos;
+}
+
+void KItemListRubberBand::setEndPosition(const QPointF& pos)
+{
+    if (m_endPos != pos) {
+        const QPointF previous = m_endPos;
+        m_endPos = pos;
+        emit endPositionChanged(m_endPos, previous);
+    }
+}
+
+QPointF KItemListRubberBand::endPosition() const
+{
+    return m_endPos;
+}
+
+void KItemListRubberBand::setActive(bool active)
+{
+    if (m_active != active) {
+        m_active = active;
+        emit activationChanged(active);
+
+        if (!active) {
+            m_startPos = QPointF();
+            m_endPos = QPointF();
+        }
+    }
+}
+
+bool KItemListRubberBand::isActive() const
+{
+    return m_active;
+}
+
+#include "kitemlistrubberband_p.moc"