vcs.maemo.org Git - situare/blob - src/map/mapview.cpp

   1 /*
   2    Situare - A location system for Facebook
   3    Copyright (C) 2010  Ixonos Plc. Authors:
   4
   5        Sami Rämö - sami.ramo@ixonos.com
   6
   7    Situare is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU General Public License
   9    version 2 as published by the Free Software Foundation.
  10
  11    Situare is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Situare; if not, write to the Free Software
  18    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  19    USA.
  20 */
  21
  22 #include <cmath>
  23
  24 #include <QDebug>
  25 #include <QMouseEvent>
  26
  27 #include "mapcommon.h"
  28 #include "mapview.h"
  29
  30 MapView::MapView(QWidget *parent)
  31     : QGraphicsView(parent)
  32     , m_timerID(NULL)
  33 {
  34     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  35     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  36
  37     m_zoomAnimation = new QPropertyAnimation(this, "viewScale", this);
  38     connect(m_zoomAnimation, SIGNAL(finished()), this, SIGNAL(viewZoomFinished()));
  39 }
  40
  41 void MapView::setZoomLevel(int zoomLevel)
  42 {
  43 //    m_zoomTargetScale = pow(2, zoomLevel - MAX_MAP_ZOOM_LEVEL);
  44 //    m_zoomScaleDelta = (m_zoomTargetScale - currentScale()) / (ZOOM_FPS * (ZOOM_TIME / 1000));
  45 //
  46 //    if (m_timerID)
  47 //        killTimer(m_timerID);
  48 //
  49 //    m_timerID = startTimer(1000/ZOOM_FPS);
  50
  51     m_zoomAnimation->stop();
  52     m_zoomAnimation->setDuration(ZOOM_TIME);
  53     m_zoomAnimation->setStartValue(viewScale());
  54     m_zoomAnimation->setEndValue(pow(2, zoomLevel - MAX_MAP_ZOOM_LEVEL));
  55
  56     m_zoomAnimation->start();
  57 }
  58
  59 void MapView::timerEvent(QTimerEvent *event)
  60 {
  61     if (event->timerId() == m_timerID) {
  62         bool finished = false;
  63         qreal scaleFactor = currentScale();
  64
  65 //        qDebug() << __PRETTY_FUNCTION__
  66 //                 << "abs(m_zoomTargetScale - scaleFactor)" << fabs(m_zoomTargetScale - scaleFactor)
  67 //                 << "abs(m_zoomScaleDelta)" << fabs(m_zoomScaleDelta);
  68
  69         if (fabs(m_zoomTargetScale - scaleFactor) <= fabs(m_zoomScaleDelta)) {
  70             scaleFactor = m_zoomTargetScale;
  71             killTimer(event->timerId());
  72             finished = true;
  73         }
  74         else {
  75             scaleFactor += m_zoomScaleDelta;
  76         }
  77
  78 //        qDebug() << __PRETTY_FUNCTION__ << "currentScale:" << currentScale()
  79 //                                        << "m_zoomScaleDelta" << m_zoomScaleDelta
  80 //                                        << "scaleFactor:" << scaleFactor;
  81
  82         QTransform transform;
  83         transform.scale(scaleFactor, scaleFactor);
  84         setTransform(transform);
  85         emit viewContentChanged(mapToScene(viewport()->x(), viewport()->y()).toPoint());
  86
  87         if (finished && m_zoomScaleDelta > 0)
  88             emit viewZoomFinished();
  89     }
  90 }
  91
  92 qreal MapView::currentScale()
  93 {
  94     QTransform currentTransform = transform();
  95     return currentTransform.m11();
  96 }
  97
  98 qreal MapView::viewScale()
  99 {
 100     QTransform currentTransform = transform();
 101     return currentTransform.m11();
 102 }
 103
 104 void MapView::setViewScale(qreal viewScale)
 105 {
 106     QTransform transform;
 107     transform.scale(viewScale, viewScale);
 108     setTransform(transform);
 109     emit viewContentChanged(mapToScene(viewport()->x(), viewport()->y()).toPoint());
 110 }
 111
 112 void MapView::mouseMoveEvent(QMouseEvent *event)
 113 {
 114     m_scenePosition += m_mousePosition - mapToScene(event->pos()).toPoint();
 115
 116     emit viewScrolled(m_scenePosition);
 117 //    qDebug() << __PRETTY_FUNCTION__ << "m_scenePosition:" << m_scenePosition;
 118
 119     m_mousePosition = mapToScene(event->pos()).toPoint();
 120     emit viewContentChanged(mapToScene(viewport()->x(), viewport()->y()).toPoint());
 121 }
 122
 123 void MapView::mousePressEvent(QMouseEvent *event)
 124 {
 125     QGraphicsView::mousePressEvent(event);
 126
 127     m_mousePosition = mapToScene(event->pos()).toPoint();
 128     m_scenePosition = mapToScene(width() / 2 - 1, height() / 2 - 1).toPoint();
 129 }
 130
 131 void MapView::centerToSceneCoordinates(QPoint sceneCoordinate)
 132 {
 133 //    qDebug() << __PRETTY_FUNCTION__ << "sceneCoordinate" << sceneCoordinate;
 134     centerOn(sceneCoordinate);
 135 }
 136
 137 void MapView::resizeEvent(QResizeEvent *event)
 138 {
 139 //    qDebug() << "Resize event: " << event->size();
 140     emit viewResized(event->size());
 141     emit viewContentChanged(mapToScene(viewport()->x(), viewport()->y()).toPoint());
 142 }