Fixed serious usability issue: QAbstractItemView::setAutoScroll() is not usable when trying to select items outside the visible view area (reported to Qt Software with bug ID #214542) -> implemented custom auto scrolling algorithm.

BUG: 165531

svn path=/trunk/KDE/kdebase/apps/; revision=893546

1 files changed, 59 insertions, 0 deletions

diff --git a/src/dolphinviewautoscroller.h b/src/dolphinviewautoscroller.h
new file mode 100644
index 000000000..c02112b7b
--- /dev/null
+++ b/src/dolphinviewautoscroller.h
@@ -0,0 +1,59 @@
+/***************************************************************************
+ *   Copyright (C) 2008 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            *
+ ***************************************************************************/
+
+#ifndef DOLPHINVIEWAUTOSCROLLER_H
+#define DOLPHINVIEWAUTOSCROLLER_H
+
+#include <QObject>
+
+class QAbstractItemView;
+class QTimer;
+
+/**
+ * @brief Assures that an autoscrolling is done for item views.
+ *
+ * This is a workaround as QAbstractItemView::setAutoScroll() is not usable
+ * when selecting items (see Qt issue #214542).
+ */
+class DolphinViewAutoScroller : public QObject
+{
+    Q_OBJECT
+
+public:
+    DolphinViewAutoScroller(QAbstractItemView* parent);
+    virtual ~DolphinViewAutoScroller();
+    
+protected:
+    virtual bool eventFilter(QObject* watched, QEvent* event);
+
+private slots:
+    void scrollViewport();
+    
+private:
+    void triggerAutoScroll();
+    void stopAutoScroll();
+    
+private:
+    bool m_rubberBandSelection;
+    int m_scrollInc;
+    QAbstractItemView* m_itemView;
+    QTimer* m_timer;
+};
+
+#endif