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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qfxvisualitemmodel.h"
+#include "qfxflowview.h"
+
+#include <QGraphicsSceneMouseEvent>
+
+QT_BEGIN_NAMESPACE
+
+class QFxFlowViewAttached : public QObject
+{
+Q_OBJECT
+Q_PROPERTY(int row READ row NOTIFY posChanged);
+Q_PROPERTY(int column READ column NOTIFY posChanged);
+public:
+ QFxFlowViewAttached(QObject *parent);
+
+ int row() const;
+ int column() const;
+
+signals:
+ void posChanged();
+
+private:
+ friend class QFxFlowView;
+ int m_row;
+ int m_column;
+};
+
+
+QFxFlowView::QFxFlowView()
+: m_columns(0), m_model(0), m_vertical(false), m_dragItem(0), m_dragIdx(-1)
+{
+ setAcceptedMouseButtons(Qt::LeftButton);
+ setOptions(MouseEvents);
+}
+
+QFxVisualItemModel *QFxFlowView::model() const
+{
+ return m_model;
+}
+
+void QFxFlowView::setModel(QFxVisualItemModel *m)
+{
+ m_model = m;
+ refresh();
+}
+
+int QFxFlowView::columns() const
+{
+ return m_columns;
+}
+
+void QFxFlowView::setColumns(int c)
+{
+ m_columns = c;
+ refresh();
+}
+
+bool QFxFlowView::vertical() const
+{
+ return m_vertical;
+}
+
+void QFxFlowView::setVertical(bool v)
+{
+ m_vertical = v;
+}
+
+class QFxFlowViewValue : public QmlTimeLineValue
+{
+public:
+ enum Property { xProperty, yProperty };
+
+ QFxFlowViewValue(QFxItem *item, Property p)
+ : m_item(item), m_property(p) {}
+
+ qreal value() const {
+ return (m_property == xProperty)?m_item->x():m_item->y();
+ }
+ void setValue(qreal v) {
+ if (m_property == xProperty) m_item->setX(v);
+ else m_item->setY(v);
+ }
+private:
+ QFxItem *m_item;
+ Property m_property;
+};
+
+void QFxFlowView::refresh()
+{
+ if (m_model && m_columns >= 1) {
+ for (int ii = 0; ii < m_model->count(); ++ii) {
+ if (QFxItem *item = m_model->item(ii)) {
+ item->setParent(this);
+ item->setZ(0);
+ m_items << item;
+ }
+ }
+
+ reflow();
+ }
+}
+
+void QFxFlowView::reflow(bool animate)
+{
+ qreal y = 0;
+ qreal maxY = 0;
+ qreal x = 0;
+ int row = 0;
+ int column = -1;
+ if (animate)
+ clearTimeLine();
+
+ for (int ii = 0; ii < m_items.count(); ++ii) {
+ if (0 == (ii % m_columns)) {
+ y += maxY;
+ maxY = 0;
+ x = 0;
+ row = 0;
+ column++;
+ }
+
+ QFxItem *item = m_items.at(ii);
+ QFxFlowViewAttached *att =
+ (QFxFlowViewAttached *)qmlAttachedPropertiesObject<QFxFlowView>(item);
+ att->m_row = row;
+ att->m_column = column;
+ emit att->posChanged();
+
+
+ if (animate) {
+ if (vertical())
+ moveItem(item, QPointF(y, x));
+ else
+ moveItem(item, QPointF(x, y));
+ } else {
+ if (vertical()) {
+ item->setX(y);
+ item->setY(x);
+ } else {
+ item->setX(x);
+ item->setY(y);
+ }
+ }
+ if (vertical()) {
+ x += item->height();
+ maxY = qMax(maxY, item->width());
+ } else {
+ x += item->width();
+ maxY = qMax(maxY, item->height());
+ }
+ ++row;
+ }
+}
+
+void QFxFlowView::reflowDrag(const QPointF &dp)
+{
+ qreal y = 0;
+ qreal maxY = 0;
+ qreal x = 0;
+
+ clearTimeLine();
+
+ QList<QFxItem *> items;
+
+ bool dragUsed = false;
+ bool dragSeen = false;
+ for (int ii = 0; ii < m_items.count(); ++ii) {
+ if (0 == (ii % m_columns)) {
+ y += maxY;
+ maxY = 0;
+ x = 0;
+ }
+
+ QFxItem *item = m_items.at(ii);
+ if (item == m_dragItem)
+ dragSeen = true;
+ if (item == m_dragItem && dragUsed)
+ continue;
+ QRectF r;
+ if (vertical())
+ r = QRectF(y, x, item->width(), item->height());
+ else
+ r = QRectF(x, y, item->width(), item->height());
+ if (r.contains(dp)) {
+ dragUsed = true;
+ if (dragSeen)
+ m_dragIdx = items.count() + 1;
+ else
+ m_dragIdx = items.count();
+
+ items.append(m_dragItem);
+ if (m_dragItem != item) {
+ if (dragSeen)
+ items.insert(items.count() - 1, item);
+ else
+ items.append(item);
+ }
+ } else {
+ if (m_dragItem != item)
+ items.append(item);
+ }
+
+ if (vertical()) {
+ x += item->height();
+ maxY = qMax(maxY, item->width());
+ } else {
+ x += item->width();
+ maxY = qMax(maxY, item->height());
+ }
+ }
+
+ y = 0;
+ maxY = 0;
+ x = 0;
+ clearTimeLine();
+ for (int ii = 0; ii < items.count(); ++ii) {
+ if (0 == (ii % m_columns)) {
+ y += maxY;
+ maxY = 0;
+ x = 0;
+ }
+
+ QFxItem *item = items.at(ii);
+ if (item != m_dragItem) {
+ if (vertical())
+ moveItem(item, QPointF(y, x));
+ else
+ moveItem(item, QPointF(x, y));
+ }
+ if (vertical()) {
+ x += item->height();
+ maxY = qMax(maxY, item->width());
+ } else {
+ x += item->width();
+ maxY = qMax(maxY, item->height());
+ }
+ }
+
+}
+
+void QFxFlowView::moveItem(QFxItem *item, const QPointF &p)
+{
+ QFxFlowViewValue *xv = new QFxFlowViewValue(item, QFxFlowViewValue::xProperty);
+ QFxFlowViewValue *yv = new QFxFlowViewValue(item, QFxFlowViewValue::yProperty);
+ m_values << xv << yv;
+ m_timeline.move(*xv, p.x(), 100);
+ m_timeline.move(*yv, p.y(), 100);
+}
+
+void QFxFlowView::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+ for (int ii = 0; ii < m_items.count(); ++ii) {
+ QFxItem *item = m_items.at(ii);
+ QRectF r = rectForItem(ii);
+
+ if (r.contains(event->pos())) {
+ m_dragItem = item;
+ m_dragItem->setZ(1);
+ m_dragOffset = r.topLeft() - event->pos();
+ event->accept();
+ return;
+ }
+ }
+ event->ignore();
+}
+
+QRectF QFxFlowView::rectForItem(int idx) const
+{
+ QFxItem *item = m_items.at(idx);
+ QRectF r(item->x(), item->y(), item->width(), item->height());
+ return r;
+}
+
+void QFxFlowView::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+ Q_UNUSED(event);
+ if (m_dragItem) {
+ m_dragItem->setZ(0);
+
+ clearTimeLine();
+
+ if (m_dragIdx != -1) {
+ m_items.removeAll(m_dragItem);
+ m_items.insert(m_dragIdx, m_dragItem);
+ }
+
+ reflow(true);
+ m_dragItem = 0;
+ m_dragIdx = -1;
+ }
+}
+
+QFxFlowViewAttached::QFxFlowViewAttached(QObject *parent)
+: QObject(parent), m_row(0), m_column(0)
+{
+}
+
+int QFxFlowViewAttached::row() const
+{
+ return m_row;
+}
+
+int QFxFlowViewAttached::column() const
+{
+ return m_column;
+}
+
+QFxFlowViewAttached *QFxFlowView::qmlAttachedProperties(QObject *obj)
+{
+ return new QFxFlowViewAttached(obj);
+}
+
+void QFxFlowView::clearTimeLine()
+{
+ m_timeline.clear();
+ qDeleteAll(m_values);
+ m_values.clear();
+}
+
+void QFxFlowView::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+ if (m_dragItem) {
+ QPointF p = event->pos() + m_dragOffset;
+ m_dragItem->setX(p.x());
+ m_dragItem->setY(p.y());
+
+ for (int ii = 0; ii < m_items.count(); ++ii) {
+ if (m_items.at(ii) != m_dragItem && rectForItem(ii).contains(event->pos())) {
+ reflowDrag(event->pos());
+ }
+ }
+ }
+}
+
+QML_DEFINE_TYPE(QFxFlowView,FlowView);
+
+QT_END_NAMESPACE
+
+#include "qfxflowview.moc"