--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/touch/pinchzoom/mouse.cpp Mon Oct 04 01:19:32 2010 +0300
@@ -0,0 +1,199 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+** the names of its contributors may be used to endorse or promote
+** products derived from this software without specific prior written
+** permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "mouse.h"
+
+#include <QGraphicsScene>
+#include <QPainter>
+#include <QStyleOption>
+
+#include <math.h>
+
+static const double Pi = 3.14159265358979323846264338327950288419717;
+static double TwoPi = 2.0 * Pi;
+
+static qreal normalizeAngle(qreal angle)
+{
+ while (angle < 0)
+ angle += TwoPi;
+ while (angle > TwoPi)
+ angle -= TwoPi;
+ return angle;
+}
+
+//! [0]
+Mouse::Mouse()
+ : angle(0), speed(0), mouseEyeDirection(0),
+ color(qrand() % 256, qrand() % 256, qrand() % 256)
+{
+ rotate(qrand() % (360 * 16));
+ startTimer(1000 / 33);
+}
+//! [0]
+
+//! [1]
+QRectF Mouse::boundingRect() const
+{
+ qreal adjust = 0.5;
+ return QRectF(-18 - adjust, -22 - adjust,
+ 36 + adjust, 60 + adjust);
+}
+//! [1]
+
+//! [2]
+QPainterPath Mouse::shape() const
+{
+ QPainterPath path;
+ path.addRect(-10, -20, 20, 40);
+ return path;
+}
+//! [2]
+
+//! [3]
+void Mouse::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
+{
+ // Body
+ painter->setBrush(color);
+ painter->drawEllipse(-10, -20, 20, 40);
+
+ // Eyes
+ painter->setBrush(Qt::white);
+ painter->drawEllipse(-10, -17, 8, 8);
+ painter->drawEllipse(2, -17, 8, 8);
+
+ // Nose
+ painter->setBrush(Qt::black);
+ painter->drawEllipse(QRectF(-2, -22, 4, 4));
+
+ // Pupils
+ painter->drawEllipse(QRectF(-8.0 + mouseEyeDirection, -17, 4, 4));
+ painter->drawEllipse(QRectF(4.0 + mouseEyeDirection, -17, 4, 4));
+
+ // Ears
+ painter->setBrush(scene()->collidingItems(this).isEmpty() ? Qt::darkYellow : Qt::red);
+ painter->drawEllipse(-17, -12, 16, 16);
+ painter->drawEllipse(1, -12, 16, 16);
+
+ // Tail
+ QPainterPath path(QPointF(0, 20));
+ path.cubicTo(-5, 22, -5, 22, 0, 25);
+ path.cubicTo(5, 27, 5, 32, 0, 30);
+ path.cubicTo(-5, 32, -5, 42, 0, 35);
+ painter->setBrush(Qt::NoBrush);
+ painter->drawPath(path);
+}
+//! [3]
+
+//! [4]
+void Mouse::timerEvent(QTimerEvent *)
+{
+//! [4]
+ // Don't move too far away
+//! [5]
+ QLineF lineToCenter(QPointF(0, 0), mapFromScene(0, 0));
+ if (lineToCenter.length() > 150) {
+ qreal angleToCenter = ::acos(lineToCenter.dx() / lineToCenter.length());
+ if (lineToCenter.dy() < 0)
+ angleToCenter = TwoPi - angleToCenter;
+ angleToCenter = normalizeAngle((Pi - angleToCenter) + Pi / 2);
+
+ if (angleToCenter < Pi && angleToCenter > Pi / 4) {
+ // Rotate left
+ angle += (angle < -Pi / 2) ? 0.25 : -0.25;
+ } else if (angleToCenter >= Pi && angleToCenter < (Pi + Pi / 2 + Pi / 4)) {
+ // Rotate right
+ angle += (angle < Pi / 2) ? 0.25 : -0.25;
+ }
+ } else if (::sin(angle) < 0) {
+ angle += 0.25;
+ } else if (::sin(angle) > 0) {
+ angle -= 0.25;
+//! [5] //! [6]
+ }
+//! [6]
+
+ // Try not to crash with any other mice
+//! [7]
+ QList<QGraphicsItem *> dangerMice = scene()->items(QPolygonF()
+ << mapToScene(0, 0)
+ << mapToScene(-30, -50)
+ << mapToScene(30, -50));
+ foreach (QGraphicsItem *item, dangerMice) {
+ if (item == this)
+ continue;
+
+ QLineF lineToMouse(QPointF(0, 0), mapFromItem(item, 0, 0));
+ qreal angleToMouse = ::acos(lineToMouse.dx() / lineToMouse.length());
+ if (lineToMouse.dy() < 0)
+ angleToMouse = TwoPi - angleToMouse;
+ angleToMouse = normalizeAngle((Pi - angleToMouse) + Pi / 2);
+
+ if (angleToMouse >= 0 && angleToMouse < Pi / 2) {
+ // Rotate right
+ angle += 0.5;
+ } else if (angleToMouse <= TwoPi && angleToMouse > (TwoPi - Pi / 2)) {
+ // Rotate left
+ angle -= 0.5;
+//! [7] //! [8]
+ }
+//! [8] //! [9]
+ }
+//! [9]
+
+ // Add some random movement
+//! [10]
+ if (dangerMice.size() > 1 && (qrand() % 10) == 0) {
+ if (qrand() % 1)
+ angle += (qrand() % 100) / 500.0;
+ else
+ angle -= (qrand() % 100) / 500.0;
+ }
+//! [10]
+
+//! [11]
+ speed += (-50 + qrand() % 100) / 100.0;
+
+ qreal dx = ::sin(angle) * 10;
+ mouseEyeDirection = (qAbs(dx / 5) < 1) ? 0 : dx / 5;
+
+ rotate(dx);
+ setPos(mapToParent(0, -(3 + sin(speed) * 3)));
+}
+//! [11]