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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 demonstration applications 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef HOVERPOINTS_H
+#define HOVERPOINTS_H
+
+#include <QtGui>
+
+QT_FORWARD_DECLARE_CLASS(QBypassWidget)
+
+class HoverPoints : public QObject
+{
+ Q_OBJECT
+public:
+ enum PointShape {
+ CircleShape,
+ RectangleShape
+ };
+
+ enum LockType {
+ LockToLeft = 0x01,
+ LockToRight = 0x02,
+ LockToTop = 0x04,
+ LockToBottom = 0x08
+ };
+
+ enum SortType {
+ NoSort,
+ XSort,
+ YSort
+ };
+
+ enum ConnectionType {
+ NoConnection,
+ LineConnection,
+ CurveConnection
+ };
+
+ HoverPoints(QWidget *widget, PointShape shape);
+
+ bool eventFilter(QObject *object, QEvent *event);
+
+ void paintPoints();
+
+ inline QRectF boundingRect() const;
+ void setBoundingRect(const QRectF &boundingRect) { m_bounds = boundingRect; }
+
+ QPolygonF points() const { return m_points; }
+ void setPoints(const QPolygonF &points);
+
+ QSizeF pointSize() const { return m_pointSize; }
+ void setPointSize(const QSizeF &size) { m_pointSize = size; }
+
+ SortType sortType() const { return m_sortType; }
+ void setSortType(SortType sortType) { m_sortType = sortType; }
+
+ ConnectionType connectionType() const { return m_connectionType; }
+ void setConnectionType(ConnectionType connectionType) { m_connectionType = connectionType; }
+
+ void setConnectionPen(const QPen &pen) { m_connectionPen = pen; }
+ void setShapePen(const QPen &pen) { m_pointPen = pen; }
+ void setShapeBrush(const QBrush &brush) { m_pointBrush = brush; }
+
+ void setPointLock(int pos, LockType lock) { m_locks[pos] = lock; }
+
+ void setEditable(bool editable) { m_editable = editable; }
+ bool editable() const { return m_editable; }
+
+public slots:
+ void setEnabled(bool enabled);
+ void setDisabled(bool disabled) { setEnabled(!disabled); }
+
+signals:
+ void pointsChanged(const QPolygonF &points);
+
+public:
+ void firePointChange();
+
+private:
+ inline QRectF pointBoundingRect(int i) const;
+ void movePoint(int i, const QPointF &newPos, bool emitChange = true);
+
+ QWidget *m_widget;
+
+ QPolygonF m_points;
+ QRectF m_bounds;
+ PointShape m_shape;
+ SortType m_sortType;
+ ConnectionType m_connectionType;
+
+ QVector<uint> m_locks;
+
+ QSizeF m_pointSize;
+ int m_currentIndex;
+ bool m_editable;
+ bool m_enabled;
+
+ QPen m_pointPen;
+ QBrush m_pointBrush;
+ QPen m_connectionPen;
+};
+
+
+inline QRectF HoverPoints::pointBoundingRect(int i) const
+{
+ QPointF p = m_points.at(i);
+ qreal w = m_pointSize.width();
+ qreal h = m_pointSize.height();
+ qreal x = p.x() - w / 2;
+ qreal y = p.y() - h / 2;
+ return QRectF(x, y, w, h);
+}
+
+inline QRectF HoverPoints::boundingRect() const
+{
+ if (m_bounds.isEmpty())
+ return m_widget->rect();
+ else
+ return m_bounds;
+}
+
+#endif // HOVERPOINTS_H