From 638875186db1376a4405bdb93d65468ac83f744b Mon Sep 17 00:00:00 2001
From: =?utf8?q?Sami=20R=C3=A4m=C3=B6?= <sami.ramo@ixonos.com>
Date: Wed, 16 Jun 2010 14:23:34 +0300
Subject: [PATCH] Self made kinetic scrolling first working version

---
 src/map/mapengine.cpp   |    8 ++++----
 src/map/mapscroller.cpp |    4 +++-
 src/map/mapscroller.h   |    5 ++---
 src/map/mapview.cpp     |   27 +++++++++++++++++++++------
 src/map/mapview.h       |    8 ++++++--
 5 files changed, 36 insertions(+), 16 deletions(-)

diff --git a/src/map/mapengine.cpp b/src/map/mapengine.cpp
index 12c8e3a..ca6d33e 100644
--- a/src/map/mapengine.cpp
+++ b/src/map/mapengine.cpp
@@ -88,6 +88,9 @@ MapEngine::MapEngine(QObject *parent)
             this, SIGNAL(locationItemClicked(QList<QString>)));
 
     m_scroller = &MapScroller::getInstance();
+
+    connect(m_scroller, SIGNAL(coordinateUpdated(QPoint)),
+            this, SLOT(setLocation(QPoint)));
 }
 
 MapEngine::~MapEngine()
@@ -392,10 +395,7 @@ void MapEngine::setLocation(QPoint sceneCoordinate)
     qDebug() << __PRETTY_FUNCTION__;
 
     // jump to opposite side of the world if world horizontal limit is exceeded
-    if (sceneCoordinate.x() < MAP_MIN_PIXEL_X)
-        sceneCoordinate.setX(sceneCoordinate.x() + MAP_PIXELS_X);
-    else if (sceneCoordinate.x() > MAP_MAX_PIXEL_X)
-        sceneCoordinate.setX(sceneCoordinate.x() - MAP_PIXELS_X);
+    sceneCoordinate.setX(normalize(sceneCoordinate.x(), MAP_MIN_PIXEL_X, MAP_MAX_PIXEL_X));
 
     // don't allow vertical scene coordinates go out of the map
     sceneCoordinate.setY(qBound(MAP_MIN_PIXEL_Y, sceneCoordinate.y(), MAP_MAX_PIXEL_Y));
diff --git a/src/map/mapscroller.cpp b/src/map/mapscroller.cpp
index 9d9c626..49ccc9c 100644
--- a/src/map/mapscroller.cpp
+++ b/src/map/mapscroller.cpp
@@ -37,5 +37,7 @@ MapScroller& MapScroller::getInstance()
 
 void MapScroller::updateCurrentValue(const QVariant &value)
 {
-    qWarning() << __PRETTY_FUNCTION__ << value.toPointF().x() << value.toPointF().y();
+    qDebug() << __PRETTY_FUNCTION__;
+
+    emit coordinateUpdated(value.toPoint());
 }
diff --git a/src/map/mapscroller.h b/src/map/mapscroller.h
index aef5953..2593a10 100644
--- a/src/map/mapscroller.h
+++ b/src/map/mapscroller.h
@@ -23,6 +23,7 @@
 #ifndef MAPSCROLLER_H
 #define MAPSCROLLER_H
 
+#include <QPoint>
 #include <QVariantAnimation>
 
 class MapScroller : public QVariantAnimation
@@ -43,9 +44,7 @@ public:
     static MapScroller &getInstance();
 
 signals:
-
-public slots:
-
+    void coordinateUpdated(QPoint coordinate);
 };
 
 #endif // MAPSCROLLER_H
diff --git a/src/map/mapview.cpp b/src/map/mapview.cpp
index ee797fe..06d4b9c 100644
--- a/src/map/mapview.cpp
+++ b/src/map/mapview.cpp
@@ -55,31 +55,44 @@ void MapView::centerToSceneCoordinates(QPoint sceneCoordinate)
 
 void MapView::mouseMoveEvent(QMouseEvent *event)
 {
-    m_scenePosition += m_mousePosition - mapToScene(event->pos());
+    m_scenePosition += m_mouseLastScenePosition - mapToScene(event->pos()).toPoint();
 
     qDebug() << __PRETTY_FUNCTION__ << "m_scenePosition:" << m_scenePosition;
 
-    emit viewScrolled(m_scenePosition.toPoint());
+    m_dragViewSpeed = m_mouseLastViewPosition - event->pos() ;
+//    qWarning() << __PRETTY_FUNCTION__ << m_dragViewSpeed.x() << m_dragViewSpeed.y();
 
-    m_mousePosition = mapToScene(event->pos());
+    emit viewScrolled(m_scenePosition);
+
+    m_mouseLastScenePosition = mapToScene(event->pos()).toPoint();
+    m_mouseLastViewPosition = event->pos();
 }
 
 void MapView::mousePressEvent(QMouseEvent *event)
 {
     qDebug() << __PRETTY_FUNCTION__;
 
+    m_scroller->stop();
+
     QGraphicsView::mousePressEvent(event);
 
-    m_mousePosition = mapToScene(event->pos());
-    m_scenePosition = mapToScene(width() / 2 - 1, height() / 2 - 1);
+    m_mouseLastScenePosition = mapToScene(event->pos()).toPoint();
+    m_mouseLastViewPosition = event->pos();
+    m_scenePosition = mapToScene(width() / 2 - 1, height() / 2 - 1).toPoint();
+
+    m_dragViewSpeed = QPoint();
 }
 
 void MapView::mouseReleaseEvent(QMouseEvent *event)
 {
+//    qWarning() << __PRETTY_FUNCTION__;
+
     QGraphicsView::mouseReleaseEvent(event);
 
+    QPoint dragSceneSpeed = m_dragViewSpeed * (1 << (MAX_MAP_ZOOM_LEVEL - m_zoomLevel));
+
     m_scroller->setStartValue(m_scenePosition);
-    m_scroller->setEndValue(m_scenePosition + m_scenePosition);
+    m_scroller->setEndValue(m_scenePosition + dragSceneSpeed * 5);
     m_scroller->setDuration(1000);
     m_scroller->start();
 }
@@ -104,6 +117,8 @@ void MapView::setZoomLevel(int zoomLevel)
 {
     qDebug() << __PRETTY_FUNCTION__;
 
+    m_zoomLevel = zoomLevel;
+
     if (m_zoomAnimation) {
         m_zoomAnimation->stop();
         m_zoomAnimation->setDuration(ZOOM_TIME);
diff --git a/src/map/mapview.h b/src/map/mapview.h
index e53c433..f936031 100644
--- a/src/map/mapview.h
+++ b/src/map/mapview.h
@@ -148,8 +148,12 @@ signals:
  * DATA MEMBERS
  ******************************************************************************/
 private:
-    QPointF m_mousePosition;               ///< Previous mouse event position
-    QPointF m_scenePosition;               ///< New center position
+    int m_zoomLevel;
+
+    QPoint m_dragViewSpeed;
+    QPoint m_mouseLastScenePosition;               ///< Previous mouse event position
+    QPoint m_mouseLastViewPosition;
+    QPoint m_scenePosition;               ///< New center position
     QPropertyAnimation *m_zoomAnimation;  ///< Zoom animation
 
     MapScroller *m_scroller;
-- 
1.7.9.5