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/* This file is part of the KDE project
Copyright (C) 2008 Rafael Fernández López <ereslibre@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef KFILEPLACESVIEW_P_H
#define KFILEPLACESVIEW_P_H
#include <QMouseEvent>
class KFilePlacesEventWatcher
: public QObject
{
Q_OBJECT
public:
KFilePlacesEventWatcher(QObject *parent = 0)
: QObject(parent) {}
const QModelIndex &hoveredIndex() const
{
return m_hoveredIndex;
}
const QModelIndex &focusedIndex() const
{
return m_focusedIndex;
}
Q_SIGNALS:
void entryEntered(const QModelIndex &index);
void entryLeft(const QModelIndex &index);
public Q_SLOTS:
void currentIndexChanged(const QModelIndex &index)
{
if (m_focusedIndex.isValid() && m_focusedIndex != m_hoveredIndex) {
emit entryLeft(m_focusedIndex);
}
if (index == m_hoveredIndex) {
m_focusedIndex = m_hoveredIndex;
return;
}
if (index.isValid()) {
emit entryEntered(index);
}
m_focusedIndex = index;
}
protected:
virtual bool eventFilter(QObject *watched, QEvent *event)
{
switch (event->type()) {
case QEvent::MouseMove: {
QAbstractItemView *view = qobject_cast<QAbstractItemView*>(watched->parent());
const QModelIndex index = view->indexAt(static_cast<QMouseEvent*>(event)->pos());
if (index != m_hoveredIndex) {
if (m_hoveredIndex.isValid() && m_hoveredIndex != m_focusedIndex) {
emit entryLeft(m_hoveredIndex);
}
if (index.isValid() && index != m_focusedIndex) {
emit entryEntered(index);
}
m_hoveredIndex = index;
}
}
break;
case QEvent::Leave:
if (m_hoveredIndex.isValid() && m_hoveredIndex != m_focusedIndex) {
emit entryLeft(m_hoveredIndex);
}
m_hoveredIndex = QModelIndex();
break;
case QEvent::MouseButtonPress:
case QEvent::MouseButtonDblClick: {
// Prevent the selection clearing by clicking on the viewport directly
QAbstractItemView *view = qobject_cast<QAbstractItemView*>(watched->parent());
if (!view->indexAt(static_cast<QMouseEvent*>(event)->pos()).isValid()) {
return true;
}
}
break;
default:
return false;
}
return false;
}
private:
QPersistentModelIndex m_hoveredIndex;
QPersistentModelIndex m_focusedIndex;
};
#endif
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