From 0eccc0f9ee9579883a829c373cfc1c072704bca0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Erik=20Nilsen?= <bjorn.nilsen@nokia.com>
Date: Wed, 29 Jul 2009 05:15:02 +0200
Subject: Make it possible to disable graphics effects.

Adds QGraphicsEffect::setEnabled/isEnabled
---
 src/gui/graphicsview/qgraphicseffect.cpp | 12 ++++++++++++
 src/gui/graphicsview/qgraphicseffect.h   |  9 +++++++--
 src/gui/graphicsview/qgraphicseffect_p.h |  5 +++--
 src/gui/graphicsview/qgraphicsitem.cpp   |  2 +-
 src/gui/graphicsview/qgraphicsscene.cpp  |  4 ++--
 5 files changed, 25 insertions(+), 7 deletions(-)

diff --git a/src/gui/graphicsview/qgraphicseffect.cpp b/src/gui/graphicsview/qgraphicseffect.cpp
index 63cf975..358826b 100644
--- a/src/gui/graphicsview/qgraphicseffect.cpp
+++ b/src/gui/graphicsview/qgraphicseffect.cpp
@@ -174,6 +174,18 @@ QRectF QGraphicsEffect::boundingRectFor(const QRectF &rect) const
     return rect;
 }
 
+void QGraphicsEffect::setEnabled(bool enable)
+{
+    Q_D(QGraphicsEffect);
+    d->isEnabled = enable;
+}
+
+bool QGraphicsEffect::isEnabled() const
+{
+    Q_D(const QGraphicsEffect);
+    return d->isEnabled;
+}
+
 QGraphicsGrayscaleEffect::QGraphicsGrayscaleEffect()
     : QGraphicsEffect(*new QGraphicsGrayscaleEffectPrivate)
 {}
diff --git a/src/gui/graphicsview/qgraphicseffect.h b/src/gui/graphicsview/qgraphicseffect.h
index 397651f..e484f1a 100644
--- a/src/gui/graphicsview/qgraphicseffect.h
+++ b/src/gui/graphicsview/qgraphicseffect.h
@@ -71,11 +71,11 @@ class Q_GUI_EXPORT QGraphicsEffectSource : public QObject
     Q_OBJECT
 public:
     ~QGraphicsEffectSource();
-    QRectF boundingRect(Qt::CoordinateSystem s = Qt::LogicalCoordinates) const;
     const QGraphicsItem *graphicsItem() const;
     const QStyleOption *styleOption() const;
     void draw(QPainter *painter);
-    QPixmap pixmap(Qt::CoordinateSystem coordinateSystem, QPoint *offset = 0) const;
+    QRectF boundingRect(Qt::CoordinateSystem coordinateSystem = Qt::LogicalCoordinates) const;
+    QPixmap pixmap(Qt::CoordinateSystem system = Qt::LogicalCoordinates, QPoint *offset = 0) const;
 
 protected:
     QGraphicsEffectSource(QGraphicsEffectSourcePrivate &dd, QObject *parent = 0);
@@ -93,6 +93,7 @@ class QGraphicsEffectPrivate;
 class Q_GUI_EXPORT QGraphicsEffect : public QObject
 {
     Q_OBJECT
+    Q_PROPERTY(bool enabled READ isEnabled WRITE setEnabled)
 public:
     QGraphicsEffect();
     virtual ~QGraphicsEffect();
@@ -102,6 +103,10 @@ public:
     QPixmap sourcePixmap() const;
     bool hasSourcePixmap() const;
     virtual QRectF boundingRectFor(const QRectF &rect) const;
+    bool isEnabled() const;
+
+public Q_SLOTS:
+    void setEnabled(bool enable);
 
 protected:
     QGraphicsEffect(QGraphicsEffectPrivate &d);
diff --git a/src/gui/graphicsview/qgraphicseffect_p.h b/src/gui/graphicsview/qgraphicseffect_p.h
index b106e8e..f084a84 100644
--- a/src/gui/graphicsview/qgraphicseffect_p.h
+++ b/src/gui/graphicsview/qgraphicseffect_p.h
@@ -82,7 +82,7 @@ class QGraphicsEffectPrivate : public QObjectPrivate
 {
     Q_DECLARE_PUBLIC(QGraphicsEffect)
 public:
-    QGraphicsEffectPrivate() : source(0), hasSourcePixmap(0) {}
+    QGraphicsEffectPrivate() : source(0), hasSourcePixmap(0), isEnabled(1) {}
     QGraphicsEffectSource *source;
     inline void setGraphicsEffectSource(QGraphicsEffectSource *newSource)
     {
@@ -95,7 +95,8 @@ public:
     QRectF boundingRect;
     QPixmap sourcePixmap;
     quint32 hasSourcePixmap : 1;
-    quint32 padding : 31; // feel free to use
+    quint32 isEnabled : 1;
+    quint32 padding : 30; // feel free to use
 };
 
 class QGraphicsGrayscaleEffectPrivate : public QGraphicsEffectPrivate
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
index bb3258d..8c604e1 100644
--- a/src/gui/graphicsview/qgraphicsitem.cpp
+++ b/src/gui/graphicsview/qgraphicsitem.cpp
@@ -2252,7 +2252,7 @@ void QGraphicsItem::setGraphicsEffect(QGraphicsEffect *effect)
 */
 QRectF QGraphicsItem::effectiveBoundingRect() const
 {
-    if (d_ptr->graphicsEffect)
+    if (d_ptr->graphicsEffect && d_ptr->graphicsEffect->isEnabled())
         return d_ptr->graphicsEffect->boundingRect();
     return boundingRect();
 }
diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp
index 99aa347..9ce02a2 100644
--- a/src/gui/graphicsview/qgraphicsscene.cpp
+++ b/src/gui/graphicsview/qgraphicsscene.cpp
@@ -4303,7 +4303,7 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter *
     if (itemHasChildren && itemClipsChildrenToShape)
         ENSURE_TRANSFORM_PTR;
 
-    if (item->d_ptr->graphicsEffect) {
+    if (item->d_ptr->graphicsEffect && item->d_ptr->graphicsEffect->isEnabled()) {
         if (item->type() == 7) {
             item->d_ptr->graphicsEffect->setSourcePixmap(static_cast<QGraphicsPixmapItem*>(item)
                                                          ->pixmap());
@@ -4484,7 +4484,7 @@ void QGraphicsScenePrivate::markDirty(QGraphicsItem *item, const QRectF &rect, b
     QGraphicsItem *p = item->d_ptr->parent;
     while (p) {
         p->d_ptr->dirtyChildren = 1;
-        if (p->d_ptr->graphicsEffect) {
+        if (p->d_ptr->graphicsEffect && p->d_ptr->graphicsEffect->isEnabled()) {
             p->d_ptr->dirty = 1;
             p->d_ptr->fullUpdatePending = 1;
         }
-- 
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