source: flair-src/trunk/tools/FlairGCS/src/mapwidget.cpp@ 12

// %flair:license{
// This file is part of the Flair framework distributed under the
// CECILL-C License, Version 1.0.
// %flair:license}
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#include <QApplication>
#include <QGeoCoordinate>
#include <QGraphicsScene>

#include <QTimer>
#include <QMenu>
#include "mapwidget.h"
#include "Landmark.h"
#include "Map.h"

using namespace QtMobility;

MapWidget::MapWidget(Map* map,QWidget *parent)
    : QGraphicsView(parent) {
    setCursor(Qt::ArrowCursor);
    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    geoMap = 0;
    dragging = false;
    pressed = false;
    landmark_match=NULL;
    is_uptodate=true;
    this->map=map;

    m_scene = new QGraphicsScene(this);
    setScene(m_scene);
    setMouseTracking(true);

    landmarks=new QList<Landmark*>;
    landmarks_old=new QList<Landmark*>;
}

QGraphicsScene *MapWidget::scene(void) const
{
    return m_scene;
}

void MapWidget::setMap(QGraphicsGeoMap *geoMap)
{
    m_scene->clear();
    m_scene->addItem(geoMap);
    this->geoMap = geoMap;
    geoMap->resize(m_scene->sceneRect().width(), m_scene->sceneRect().height());
}

void MapWidget::mousePressEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton)
    {
        pressed = true;
        dragStartPosition = event->pos();
        QTimer::singleShot(qApp->startDragTime(), this, SLOT(initDrag()));
        event->accept();
    }

    if (event->button() == Qt::RightButton)
    {
        QMenu *menu = new QMenu("nom", this);

        if(cursor().shape()!=Qt::PointingHandCursor)
        {
            QAction *b,*z;//*a,
            QList<QAction*> go_to_actions;
            QList<QAction*> centered_actions;

            QMenu *centered_menu=menu->addMenu("centered");
            for(int i=0;i<points.count();i++)
            {
                QAction* action=centered_menu->addAction(points.at(i));
                centered_actions.append(action);
                action->setCheckable(true);
                if(map->centeredPoint()==i)
                {
                    action->setChecked(true);
                }
                else
                {
                    action->setChecked(false);
                }
            }

            menu->addSeparator();

            b=menu->addAction("place checkpoint");
            QMenu *go_to_menu=menu->addMenu("go to");
            for(int i=0;i<landmarks->count();i++)
            {
                QAction* action=go_to_menu->addAction(QString("checkpoint %1").arg(i+1));
                go_to_actions.append(action);
            }
            if(landmarks->count()==0) go_to_menu->setEnabled(false);

            map->appendmenu(menu);
            z=map->execmenu(this,menu,event->globalPos());

            for(int i=0;i<centered_actions.count();i++)
            {
                if(z==centered_actions.at(i))
                {
                    if(centered_actions.at(i)->isChecked())
                    {
                        map->setCenteredPoint(i);
                    }
                    else
                    {
                        map->setCenteredPoint(-1);
                    }

                    break;
                }
            }

            if(z==b)
            {
                Landmark* landmark=new Landmark(geoMap,geoMap->screenPositionToCoordinate(event->pos()),QString("%1").arg(landmarks->count()+1));
                landmarks->append(landmark);
                is_uptodate=false;
            }
            for(int i=0;i<go_to_actions.count();i++)
            {
                if(z==go_to_actions.at(i))
                {
                    map->setCenteredPoint(-1);
                    geoMap->setCenter(landmarks->at(i)->coordinate());
                    break;
                }
            }

        }
        else
        {
            QAction *a,*z;
            a=menu->addAction("delete");
            z=menu->exec(event->globalPos());

            if(z==a)
            {
                int i;
                for(i=0;i<landmarks->count();i++)
                {
                    if(landmarks->at(i)->contains(geoMap->screenPositionToCoordinate(event->pos())))
                    {
                        delete landmarks->at(i);
                        landmarks->removeAt(i);
                        break;
                    }
                }
                for(int j=i;j<landmarks->count();j++)
                {
                    landmarks->at(j)->setText(QString("%1").arg(j+1));
                }
            }
        }

        delete menu;
    }
}

void MapWidget::initDrag(void)
{
    if (pressed && map->isCentered() && landmark_match==NULL) {
        dragging = true;
    }
}

void MapWidget::mouseMoveEvent(QMouseEvent *event)
{
    if (!geoMap)
        return;

    Qt::CursorShape new_cursor;
    if(dragging==true)
    {
        new_cursor=Qt::ClosedHandCursor;
    }
    else
    {
        if(map->isCentered())
        {
            if(pressed==true)
            {
                new_cursor=Qt::ForbiddenCursor;
            }
            else
            {
                new_cursor=Qt::ArrowCursor;
            }
        }
        else
        {
            new_cursor=Qt::OpenHandCursor;
        }
        if(landmark_match!=NULL) new_cursor=Qt::PointingHandCursor;
    }


    for(int i=0;i<landmarks->count();i++)
    {
        if(landmarks->at(i)->contains(geoMap->screenPositionToCoordinate(event->pos())))
        {
            if(pressed && landmark_match==NULL)
            {
                landmark_match=landmarks->at(i);
                landmark_match->setColor(Qt::red);
                is_uptodate=false;
            }
            new_cursor=Qt::PointingHandCursor;
            break;
        }
    }

    if(new_cursor!=cursor().shape()) setCursor(new_cursor);

    QPoint v = event->pos() - dragStartPosition;

    if (dragging) {
        geoMap->pan(-v.x(), -v.y());
        dragStartPosition = event->pos();

    } else if(landmark_match!=NULL){
        landmark_match->setCoordinate(geoMap->screenPositionToCoordinate(event->pos()));

    } else if (pressed && !map->isCentered() &&
        v.manhattanLength() >= qApp->startDragDistance()) {
        dragging = true;

    } else {
        dragStartPosition = event->pos();
        emit positionChanged(geoMap->screenPositionToCoordinate(event->pos()));
    }

    event->accept();
}

void MapWidget::mouseReleaseEvent(QMouseEvent *event)
{
    pressed = false;
    landmark_match=NULL;

    if (dragging) {
        QPoint v = event->pos() - dragStartPosition;
        geoMap->pan(-v.x(), -v.y());
        dragging = false;
    }

    event->accept();
}

void MapWidget::resizeEvent(QResizeEvent *event)
{
    if (geoMap) {
        m_scene->setSceneRect(QRectF(0, 0, event->size().width(), event->size().height()));
        geoMap->resize(event->size().width(), event->size().height());
    }

    QGraphicsView::resizeEvent(event);
}

void MapWidget::wheelEvent(QWheelEvent *event)
{
    int steps = event->delta() / 120;
    int zoom = qBound(geoMap->minimumZoomLevel(), geoMap->zoomLevel() + steps,
                      geoMap->maximumZoomLevel());

    if (zoom != geoMap->zoomLevel()) geoMap->setZoomLevel(zoom);
    //if(!centered) geoMap->setCenter(geoMap->screenPositionToCoordinate(event->pos()));
}

void MapWidget::mouseDoubleClickEvent(QMouseEvent *event)
{
    if(!map->isCentered()) geoMap->setCenter(geoMap->screenPositionToCoordinate(event->pos()));
}

bool MapWidget::IsUptodate(void)
{
    return is_uptodate;
}

void MapWidget::SetUptodate(void)
{
    for(int i=0;i<landmarks_old->count();i++)
    {
        delete landmarks_old->at(i);
    }
    landmarks_old->clear();

    for(int i=0;i<landmarks->count();i++)
    {
        landmarks->at(i)->setColor(Qt::white);
        Landmark* landmark=new Landmark(geoMap,landmarks->at(i)->coordinate(),QString("%1").arg(landmarks->count()+1));
        landmarks_old->append(landmark);
        landmarks_old->at(i)->setVisible(false);
    }

    is_uptodate=true;
}

void MapWidget::Reset(void)
{
    for(int i=0;i<landmarks->count();i++)
    {
        delete landmarks->at(i);
    }
    landmarks->clear();

    for(int i=0;i<landmarks_old->count();i++)
    {
        Landmark* landmark=new Landmark(geoMap,landmarks_old->at(i)->coordinate(),QString("%1").arg(landmarks->count()+1));
        landmarks->append(landmark);
        landmarks->at(i)->setColor(Qt::white);
    }

    is_uptodate=true;
}

QList<Landmark*>* MapWidget::Landmarks(void)
{
    return landmarks;
}

bool MapWidget::LandmarkToSend(int index)
{
    if(index>=landmarks_old->count()) return true;

    if(landmarks->at(index)->coordinate()!=landmarks_old->at(index)->coordinate())
        return true;
    else
        return false;
}
void MapWidget::RemoveLandmarks(void)
{
    for(int i=0;i<landmarks->count();i++)
    {
        landmarks->at(i)->RemoveLandmark();
    }
    for(int i=0;i<landmarks_old->count();i++)
    {
        landmarks_old->at(i)->RemoveLandmark();
    }
}

void MapWidget::AddLandmarks(QGraphicsGeoMap *geoMap)
{
    for(int i=0;i<landmarks->count();i++)
    {
        landmarks->at(i)->AddLandmark(geoMap);
    }
    for(int i=0;i<landmarks_old->count();i++)
    {
        landmarks_old->at(i)->AddLandmark(geoMap);
    }
}

void MapWidget::AddLandmark(const QGeoCoordinate &coordinate)
{
    Landmark* landmark=new Landmark(geoMap,coordinate,QString("%1").arg(landmarks->count()+1));
    landmarks->append(landmark);
    landmark->setColor(Qt::white);
    landmark=new Landmark(geoMap,coordinate,QString("%1").arg(landmarks_old->count()+1));
    landmarks_old->append(landmark);
    landmark->setColor(Qt::white);
    landmark->setVisible(false);
}

void MapWidget::AddPoint(QString name)
{
    points.append(name);
}