62d4840011
The scale(), rotate() and translate() functions are replaced with QGraphicsItem::setTransform. Change-Id: Icb81c71b1513c049e2fd607995ca3a868108ee30 Reviewed-by: Lars Knoll <lars.knoll@nokia.com> Reviewed-by: Andreas Aardal Hanssen <andrhans@cisco.com>
89 lines
3.3 KiB
C++
89 lines
3.3 KiB
C++
/****************************************************************************
|
|
**
|
|
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
|
|
** Contact: http://www.qt-project.org/
|
|
**
|
|
** 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());
|
|
|
|
setTransform(QTransform().rotate(line2.angleTo(line1)), true);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
return QGraphicsItem::sceneEvent(event);
|
|
}
|
|
|
|
return true;
|
|
}
|