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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
** this package.
**
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <cmath>
#include "guide.h"
#include "colors.h"
Guide::Guide(Guide *follows)
{
this->scaleX = 1.0;
this->scaleY = 1.0;
if (follows){
while (follows->nextGuide != follows->firstGuide) // append to end
follows = follows->nextGuide;
follows->nextGuide = this;
this->prevGuide = follows;
this->firstGuide = follows->firstGuide;
this->nextGuide = follows->firstGuide;
this->startLength = int(follows->startLength + follows->length()) + 1;
}
else{
this->prevGuide = this;
this->firstGuide = this;
this->nextGuide = this;
this->startLength = 0;
}
}
void Guide::setScale(float scaleX, float scaleY, bool all)
{
this->scaleX = scaleX;
this->scaleY = scaleY;
if (all){
Guide *next = this->nextGuide;
while(next != this){
next->scaleX = scaleX;
next->scaleY = scaleY;
next = next->nextGuide;
}
}
}
void Guide::setFence(const QRectF &fence, bool all)
{
this->fence = fence;
if (all){
Guide *next = this->nextGuide;
while(next != this){
next->fence = fence;
next = next->nextGuide;
}
}
}
Guide::~Guide()
{
if (this != this->nextGuide && this->nextGuide != this->firstGuide)
delete this->nextGuide;
}
float Guide::lengthAll()
{
float len = length();
Guide *next = this->nextGuide;
while(next != this){
len += next->length();
next = next->nextGuide;
}
return len;
}
void Guide::move(DemoItem *item, QPointF &dest, float moveSpeed)
{
QLineF walkLine(item->getGuidedPos(), dest);
if (moveSpeed >= 0 && walkLine.length() > moveSpeed){
// The item is too far away from it's destination point.
// So we choose to move it towards it instead.
float dx = walkLine.dx();
float dy = walkLine.dy();
if (qAbs(dx) > qAbs(dy)){
// walk along x-axis
if (dx != 0){
float d = moveSpeed * dy / qAbs(dx);
float s = dx > 0 ? moveSpeed : -moveSpeed;
dest.setX(item->getGuidedPos().x() + s);
dest.setY(item->getGuidedPos().y() + d);
}
}
else{
// walk along y-axis
if (dy != 0){
float d = moveSpeed * dx / qAbs(dy);
float s = dy > 0 ? moveSpeed : -moveSpeed;
dest.setX(item->getGuidedPos().x() + d);
dest.setY(item->getGuidedPos().y() + s);
}
}
}
item->setGuidedPos(dest);
}
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