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author | Jørgen Lind <jorgen.lind@nokia.com> | 2010-08-03 10:53:57 (GMT) |
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committer | Jørgen Lind <jorgen.lind@nokia.com> | 2010-08-03 10:53:57 (GMT) |
commit | d5491ecdde14659a913c9f476f18c45f1d9489bb (patch) | |
tree | 06cc52249feda9bd9e50ca47abb8ebd676c8a309 /examples/touch/knobs/knob.cpp | |
parent | 42cdfaf86d34afeb6448723839fef70fe477deed (diff) | |
parent | a41128af5373a0225c3548abd3eb82cd7e8f7a0e (diff) | |
download | Qt-d5491ecdde14659a913c9f476f18c45f1d9489bb.zip Qt-d5491ecdde14659a913c9f476f18c45f1d9489bb.tar.gz Qt-d5491ecdde14659a913c9f476f18c45f1d9489bb.tar.bz2 |
Merge branch '4.7' of scm.dev.nokia.troll.no:qt/qt into lighthouse
Conflicts:
configure
Diffstat (limited to 'examples/touch/knobs/knob.cpp')
-rw-r--r-- | examples/touch/knobs/knob.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/examples/touch/knobs/knob.cpp b/examples/touch/knobs/knob.cpp new file mode 100644 index 0000000..6ddd9b3 --- /dev/null +++ b/examples/touch/knobs/knob.cpp @@ -0,0 +1,88 @@ +/**************************************************************************** +** +** 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 "knob.h" + +#include <QBrush> +#include <QTouchEvent> + +Knob::Knob() + : QGraphicsEllipseItem(-50, -50, 100, 100) +{ + setAcceptTouchEvents(true); + setBrush(Qt::lightGray); + + QGraphicsEllipseItem *leftItem = new QGraphicsEllipseItem(0, 0, 20, 20, this); + leftItem->setPos(-40, -10); + leftItem->setBrush(Qt::darkGreen); + + QGraphicsEllipseItem *rightItem = new QGraphicsEllipseItem(0, 0, 20, 20, this); + rightItem->setPos(20, -10); + rightItem->setBrush(Qt::darkRed); +} + +bool Knob::sceneEvent(QEvent *event) +{ + switch (event->type()) { + case QEvent::TouchBegin: + case QEvent::TouchUpdate: + case QEvent::TouchEnd: + { + QTouchEvent *touchEvent = static_cast<QTouchEvent *>(event); + + if (touchEvent->touchPoints().count() == 2) { + const QTouchEvent::TouchPoint &touchPoint1 = touchEvent->touchPoints().first(); + const QTouchEvent::TouchPoint &touchPoint2 = touchEvent->touchPoints().last(); + + QLineF line1(touchPoint1.lastScenePos(), touchPoint2.lastScenePos()); + QLineF line2(touchPoint1.scenePos(), touchPoint2.scenePos()); + + rotate(line2.angleTo(line1)); + } + + break; + } + + default: + return QGraphicsItem::sceneEvent(event); + } + + return true; +} |