Add properties to QGraphicsItem to change the transformations component

With the new properties it is possible to easily animate.

Setting a transform using setTransform is incompatible with thoses
properties.  Accessing thoses propeties if you set previously a
transform will give you the default values.

Acknowledged-by: Code made with Andreas. Documentation written with Thierry.
This still need a more in depth code review and documentation review.
But it is urgent to commit now because the Animation API integration depends on it.

2 files changed, 176 insertions, 0 deletions

diff --git a/tests/benchmarks/qgraphicsitem/qgraphicsitem.pro b/tests/benchmarks/qgraphicsitem/qgraphicsitem.pro
new file mode 100644
index 0000000..c8fc07b
--- /dev/null
+++ b/tests/benchmarks/qgraphicsitem/qgraphicsitem.pro
@@ -0,0 +1,6 @@
+load(qttest_p4)
+TEMPLATE = app
+TARGET = tst_qgraphicsitem
+
+SOURCES += tst_qgraphicsitem.cpp
+
diff --git a/tests/benchmarks/qgraphicsitem/tst_qgraphicsitem.cpp b/tests/benchmarks/qgraphicsitem/tst_qgraphicsitem.cpp
new file mode 100644
index 0000000..68e3aa1
--- /dev/null
+++ b/tests/benchmarks/qgraphicsitem/tst_qgraphicsitem.cpp
@@ -0,0 +1,170 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+****************************************************************************/
+
+#include <qtest.h>
+#include <QGraphicsItem>
+#include <QGraphicsScene>
+#include <QGraphicsView>
+
+//TESTED_FILES=
+
+class tst_QGraphicsItem : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QGraphicsItem();
+    virtual ~tst_QGraphicsItem();
+
+public slots:
+    void init();
+    void cleanup();
+
+private slots:
+    void setPos_data();
+    void setPos();
+    void setTransform_data();
+    void setTransform();
+    void rotate();
+    void scale();
+    void shear();
+    void translate();
+    void setRotation();
+    void setRotationXYZ();
+};
+
+tst_QGraphicsItem::tst_QGraphicsItem()
+{
+}
+
+tst_QGraphicsItem::~tst_QGraphicsItem()
+{
+}
+
+void tst_QGraphicsItem::init()
+{
+}
+
+void tst_QGraphicsItem::cleanup()
+{
+}
+
+void tst_QGraphicsItem::setPos_data()
+{
+    QTest::addColumn<QPointF>("pos");
+
+    QTest::newRow("0, 0") << QPointF(0, 0);
+    QTest::newRow("10, 10") << QPointF(10, 10);
+    QTest::newRow("-10, -10") << QPointF(-10, -10);
+}
+
+void tst_QGraphicsItem::setPos()
+{
+    QFETCH(QPointF, pos);
+
+    QGraphicsScene scene;
+    QGraphicsRectItem *rect = scene.addRect(QRectF(0, 0, 100, 100));
+
+    QBENCHMARK {
+        rect->setPos(10, 10);
+        rect->transform(); // prevent lazy optimizing
+    }
+}
+
+void tst_QGraphicsItem::setTransform_data()
+{
+    QTest::addColumn<QTransform>("transform");
+
+    QTest::newRow("id") << QTransform();
+    QTest::newRow("rotate 45z") << QTransform().rotate(45);
+    QTest::newRow("scale 2x2") << QTransform().scale(2, 2);
+    QTest::newRow("translate 100, 100") << QTransform().translate(100, 100);
+    QTest::newRow("rotate 45x 45y 45z") << QTransform().rotate(45, Qt::XAxis)
+        .rotate(45, Qt::YAxis).rotate(45, Qt::ZAxis);
+}
+
+void tst_QGraphicsItem::setTransform()
+{
+    QFETCH(QTransform, transform);
+
+    QGraphicsScene scene;
+    QGraphicsRectItem *item = scene.addRect(QRectF(0, 0, 100, 100));
+
+    QBENCHMARK {
+        item->setTransform(transform);
+        item->transform(); // prevent lazy optimizing
+    }
+}
+
+void tst_QGraphicsItem::rotate()
+{
+    QGraphicsScene scene;
+    QGraphicsItem *item = scene.addRect(QRectF(0, 0, 100, 100));
+
+    QBENCHMARK {
+        item->rotate(45);
+        item->transform(); // prevent lazy optimizing
+    }
+}
+
+void tst_QGraphicsItem::scale()
+{
+    QGraphicsScene scene;
+    QGraphicsItem *item = scene.addRect(QRectF(0, 0, 100, 100));
+
+    QBENCHMARK {
+        item->scale(2, 2);
+        item->transform(); // prevent lazy optimizing
+    }
+}
+
+void tst_QGraphicsItem::shear()
+{
+    QGraphicsScene scene;
+    QGraphicsItem *item = scene.addRect(QRectF(0, 0, 100, 100));
+
+    QBENCHMARK {
+        item->shear(1.5, 1.5);
+        item->transform(); // prevent lazy optimizing
+    }
+}
+
+void tst_QGraphicsItem::translate()
+{
+    QGraphicsScene scene;
+    QGraphicsItem *item = scene.addRect(QRectF(0, 0, 100, 100));
+
+    QBENCHMARK {
+        item->translate(100, 100);
+        item->transform(); // prevent lazy optimizing
+    }
+}
+
+void tst_QGraphicsItem::setRotation()
+{
+    QGraphicsScene scene;
+    QGraphicsItem *item = scene.addRect(QRectF(0, 0, 100, 100));
+
+    QBENCHMARK {
+        item->setXRotation(45);
+        item->transform(); // prevent lazy optimizing
+    }
+}
+
+void tst_QGraphicsItem::setRotationXYZ()
+{
+    QGraphicsScene scene;
+    QGraphicsItem *item = scene.addRect(QRectF(0, 0, 100, 100));
+
+    QBENCHMARK {
+        item->setRotation(45, 45, 45);
+        item->transform(); // prevent lazy optimizing
+    }
+}
+
+QTEST_MAIN(tst_QGraphicsItem)
+#include "tst_qgraphicsitem.moc"