From 009e825d2da38b95fb2efbfbdefc4b58c8bf0fa8 Mon Sep 17 00:00:00 2001
From: Michael Brasser <michael.brasser@nokia.com>
Date: Fri, 8 May 2009 13:32:30 +1000
Subject: More Transform work.

Add Rotatation. Mark poorly documented transforms as internal for now.
---
 doc/src/declarative/elements.qdoc   |  2 -
 src/declarative/fx/qfxtransform.cpp | 96 ++++++++++++++++++++++++++++++++-----
 src/declarative/fx/qfxtransform.h   | 40 ++++++++++++++--
 3 files changed, 118 insertions(+), 20 deletions(-)

diff --git a/doc/src/declarative/elements.qdoc b/doc/src/declarative/elements.qdoc
index ae1428a..976e2f1 100644
--- a/doc/src/declarative/elements.qdoc
+++ b/doc/src/declarative/elements.qdoc
@@ -141,9 +141,7 @@ The following table lists the Qml elements provided by the Qt Declarative module
 \o
 \list
 \o \l Squish
-\o \l Perspective
 \o \l Rotation3D
-\o \l Translation3D
 \endlist
 
 \o
diff --git a/src/declarative/fx/qfxtransform.cpp b/src/declarative/fx/qfxtransform.cpp
index cc2c21c..15edc5f 100644
--- a/src/declarative/fx/qfxtransform.cpp
+++ b/src/declarative/fx/qfxtransform.cpp
@@ -179,6 +179,85 @@ void QFxAxis::setEndZ(qreal z)
     emit updated();
 }
 
+QFxRotation::QFxRotation(QObject *parent)
+: QFxTransform(parent), _angle(0), _originX(0), _originY(0), _dirty(true)
+{
+}
+
+QFxRotation::~QFxRotation()
+{
+}
+
+qreal QFxRotation::originX() const
+{
+    return _originX;
+}
+
+void QFxRotation::setOriginX(qreal ox)
+{
+    _originX = ox;
+    update();
+}
+
+qreal QFxRotation::originY() const
+{
+    return _originY;
+}
+
+void QFxRotation::setOriginY(qreal oy)
+{
+    _originY = oy;
+    update();
+}
+
+qreal QFxRotation::angle() const
+{
+    return _angle;
+}
+
+void QFxRotation::setAngle(qreal angle)
+{
+    _angle = angle;
+    update();
+}
+
+bool QFxRotation::isIdentity() const
+{
+    return (_angle == 0.);
+}
+
+#if defined(QFX_RENDER_QPAINTER)
+QTransform QFxRotation::transform() const
+{
+    if (_dirty) {
+        _transform = QTransform();
+        _dirty = false;
+        _transform.translate(_originX, _originY);
+        _transform.rotate(_angle);
+        _transform.translate(-_originX, -_originY);
+    }
+    return _transform;
+}
+#elif defined(QFX_RENDER_OPENGL)
+QMatrix4x4 QFxRotation::transform() const
+{
+    if (_dirty) {
+        _transform = QMatrix4x4();
+        _dirty = false;
+        _transform.rotate(_angle, _originX, _originY);
+    }
+    return _transform;
+}
+#endif
+
+void QFxRotation::update()
+{
+    _dirty = true;
+    QFxTransform::update();
+}
+
+QML_DEFINE_TYPE(QFxRotation, Rotation);
+
 /*!
     \qmlclass Rotation3D
     \brief A Rotation3D object provides a way to rotate an Item around an axis.
@@ -314,12 +393,11 @@ QMatrix4x4 QFxRotation3D::transform() const
 void QFxRotation3D::update()
 {
     _dirty = true;
-    QFxItem *item = qobject_cast<QFxItem *>(parent());
-    if (item)
-        item->updateTransform();
+    QFxTransform::update();
 }
 
 /*!
+    \internal
     \qmlclass Translation3D
     \brief A Translation3D object provides a way to move an Item along an axis.
 
@@ -448,12 +526,11 @@ void QFxTranslation3D::update()
     }
 #endif
 
-    QFxItem *item = qobject_cast<QFxItem *>(parent());
-    if (item)
-        item->updateTransform();
+    QFxTransform::update();
 }
 
 /*!
+    \internal
     \qmlclass Perspective
     \brief A Perspective object specifies a perspective transformation.
 
@@ -751,13 +828,6 @@ void QFxSquish::setbottomRight_y(qreal v)
     update();
 }
 
-void QFxSquish::update()
-{
-    QFxItem *item = qobject_cast<QFxItem *>(parent());
-    if (item)
-        item->updateTransform();
-}
-
 bool QFxSquish::isIdentity() const
 {
     return false;
diff --git a/src/declarative/fx/qfxtransform.h b/src/declarative/fx/qfxtransform.h
index 14bce9b..a3a1a83 100644
--- a/src/declarative/fx/qfxtransform.h
+++ b/src/declarative/fx/qfxtransform.h
@@ -109,6 +109,41 @@ private:
 };
 QML_DECLARE_TYPE(QFxAxis);
 
+class Q_DECLARATIVE_EXPORT QFxRotation : public QFxTransform
+{
+    Q_OBJECT
+
+    Q_PROPERTY(qreal originX READ originX WRITE setOriginX)
+    Q_PROPERTY(qreal originY READ originY WRITE setOriginY)
+    Q_PROPERTY(qreal angle READ angle WRITE setAngle)
+public:
+    QFxRotation(QObject *parent=0);
+    ~QFxRotation();
+
+    qreal originX() const;
+    void setOriginX(qreal);
+
+    qreal originY() const;
+    void setOriginY(qreal);
+
+    qreal angle() const;
+    void setAngle(qreal);
+
+    virtual bool isIdentity() const;
+    virtual QSimpleCanvas::Matrix transform() const;
+
+private Q_SLOTS:
+    void update();
+private:
+    qreal _originX;
+    qreal _originY;
+    qreal _angle;
+
+    mutable bool _dirty;
+    mutable QSimpleCanvas::Matrix _transform;
+};
+QML_DECLARE_TYPE(QFxRotation);
+
 class Q_DECLARATIVE_EXPORT QFxRotation3D : public QFxTransform
 {
     Q_OBJECT
@@ -124,9 +159,6 @@ public:
     qreal angle() const;
     void setAngle(qreal);
 
-    qreal distanceToPlane() const;
-    void setDistanceToPlane(qreal);
-
     virtual bool isIdentity() const;
     virtual QSimpleCanvas::Matrix transform() const;
 
@@ -271,8 +303,6 @@ public:
     virtual QSimpleCanvas::Matrix transform() const;
 
 private:
-    void update();
-
     QPointF p;
     QSizeF s;
     QPointF p1, p2, p3, p4;
-- 
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