Implement new transformation handling for graphics items.

The idea of having separate rotationX/Y/Z, shearX/Y, etc.
methods in QGraphicsItem turned out to be not giving us
the flexibility we need and wanted.

The new code now implements a different scheme, where we
keep simple rotate (around z-axis), scale and
transformOriginPoint methods, but remove the other ones.

Instead we now have an additional list of QGraphicsTransform
object. QGraphicsTransform is an abstract class that inherits
QObject. Several specializations are provided and can be
used to transform (and through property bindings animate)
the item.

Reviewed-By: Andreas

1 files changed, 9 insertions, 2 deletions

diff --git a/demos/sub-attaq/submarine.cpp b/demos/sub-attaq/submarine.cpp
index 78a9539..029e04b 100644
--- a/demos/sub-attaq/submarine.cpp
+++ b/demos/sub-attaq/submarine.cpp
@@ -109,7 +109,14 @@ SubMarine::SubMarine(int type, const QString &name, int points, QGraphicsItem *
     setZValue(5);
     setFlags(QGraphicsItem::ItemIsMovable);
     resize(pixmapItem->boundingRect().width(),pixmapItem->boundingRect().height());
-    setTransformOrigin(boundingRect().center());
+    setTransformOriginPoint(boundingRect().center());
+
+    graphicsRotation = new QGraphicsRotation3D(this);
+    graphicsRotation->setAxis(QVector3D(0, 1, 0));
+    graphicsRotation->setOrigin(QPointF(size().width()/2, size().height()/2));
+    QList<QGraphicsTransform *> r;
+    r.append(graphicsRotation);
+    setTransformations(r);
 
     //We setup the state machine of the submarine
     QStateMachine *machine = new QStateMachine(this);
@@ -166,7 +173,7 @@ void SubMarine::setCurrentDirection(SubMarine::Movement direction)
     if (this->direction == direction)
         return;
     if (direction == SubMarine::Right && this->direction == SubMarine::None) {
-          setYRotation(180);
+          graphicsRotation->setAngle(180);
     }
     this->direction = direction;
 }