From 685fe05def77b039221edf06c74af74915d536c5 Mon Sep 17 00:00:00 2001
From: Samu Laaksonen <laaksonen.sj@gmail.com>
Date: Tue, 25 Sep 2012 20:00:41 +0300
Subject: Initial code commit

Added some stuff for project base
- tiled sources
- few Qt based classes for gfx
---
 src/ParallaxScrollerItem.cpp | 47 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 src/ParallaxScrollerItem.cpp

(limited to 'src/ParallaxScrollerItem.cpp')

diff --git a/src/ParallaxScrollerItem.cpp b/src/ParallaxScrollerItem.cpp
new file mode 100644
index 0000000..0480b29
--- /dev/null
+++ b/src/ParallaxScrollerItem.cpp
@@ -0,0 +1,47 @@
+#include "ParallaxScrollerItem.h"
+
+#include <QGraphicsView>
+#include <QGraphicsScene>
+#include <QScrollBar>
+
+#include <QPainter>
+#include <QDebug>
+
+ParallaxScrollerItem::ParallaxScrollerItem(QString layer, QPointF pos,
+                                           qreal depthFactor, qreal speed,
+                                           qreal factor, QGraphicsScene *scene,
+                                           QGraphicsItem *parent)
+    : QGraphicsPixmapItem(parent, scene), m_scrollSpeed(speed), m_factor(factor)
+{
+    m_scrollingSpeedSlowingFactor = 0;
+    m_layer.load(layer);
+    setPixmap(m_layer);
+    setPos(pos);
+    setZValue(depthFactor);
+}
+
+ParallaxScrollerItem::~ParallaxScrollerItem()
+{
+
+}
+
+void ParallaxScrollerItem::advance(int phase)
+{
+    if(phase == 1)
+    {
+        m_scrollingSpeedSlowingFactor++;
+        if(m_scrollingSpeedSlowingFactor % m_factor == 0)
+        {
+            m_scrollingSpeedSlowingFactor = 0;
+            setPos(x()-m_scrollSpeed, y());
+
+            QGraphicsView* v = scene()->views().first();
+            QPointF p = v->mapToScene(v->viewport()->x(), 0);
+
+            if(x() <= p.x()-pixmap().width())
+            {
+                setPos(p.x()+pixmap().width()-m_scrollSpeed, y());
+            }
+        }
+    }
+}
-- 
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