src/declarative/graphicsitems/qdeclarativepositioners_p_p.h
changeset 30 5dc02b23752f
child 33 3e2da88830cd
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/declarative/graphicsitems/qdeclarativepositioners_p_p.h	Tue Jul 06 15:10:48 2010 +0300
@@ -0,0 +1,140 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDECLARATIVELAYOUTS_P_H
+#define QDECLARATIVELAYOUTS_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "private/qdeclarativepositioners_p.h"
+
+#include "private/qdeclarativeitem_p.h"
+
+#include <qdeclarativestate_p.h>
+#include <qdeclarativetransitionmanager_p_p.h>
+#include <qdeclarativestateoperations_p.h>
+
+#include <QtCore/QObject>
+#include <QtCore/QString>
+#include <QtCore/QTimer>
+#include <QDebug>
+
+QT_BEGIN_NAMESPACE
+class QDeclarativeBasePositionerPrivate : public QDeclarativeItemPrivate, public QDeclarativeItemChangeListener
+{
+    Q_DECLARE_PUBLIC(QDeclarativeBasePositioner)
+
+public:
+    QDeclarativeBasePositionerPrivate()
+        : spacing(0), type(QDeclarativeBasePositioner::None)
+        , moveTransition(0), addTransition(0), queuedPositioning(false)
+        , doingPositioning(false), anchorConflict(false)
+    {
+    }
+
+    void init(QDeclarativeBasePositioner::PositionerType at)
+    {
+        type = at;
+    }
+
+    int spacing;
+
+    QDeclarativeBasePositioner::PositionerType type;
+    QDeclarativeTransition *moveTransition;
+    QDeclarativeTransition *addTransition;
+    QDeclarativeStateOperation::ActionList addActions;
+    QDeclarativeStateOperation::ActionList moveActions;
+    QDeclarativeTransitionManager addTransitionManager;
+    QDeclarativeTransitionManager moveTransitionManager;
+
+    void watchChanges(QDeclarativeItem *other);
+    void unwatchChanges(QDeclarativeItem* other);
+    bool queuedPositioning : 1;
+    bool doingPositioning : 1;
+    bool anchorConflict : 1;
+
+    virtual void itemSiblingOrderChanged(QDeclarativeItem* other)
+    {
+        Q_Q(QDeclarativeBasePositioner);
+        Q_UNUSED(other);
+        if(!queuedPositioning){
+            //Delay is due to many children often being reordered at once
+            //And we only want to reposition them all once
+            QTimer::singleShot(0,q,SLOT(prePositioning()));
+            queuedPositioning = true;
+        }
+    }
+
+    void itemGeometryChanged(QDeclarativeItem *, const QRectF &newGeometry, const QRectF &oldGeometry)
+    {
+        Q_Q(QDeclarativeBasePositioner);
+        if (newGeometry.size() != oldGeometry.size())
+            q->prePositioning();
+    }
+    virtual void itemVisibilityChanged(QDeclarativeItem *)
+    {
+        Q_Q(QDeclarativeBasePositioner);
+        q->prePositioning();
+    }
+    virtual void itemOpacityChanged(QDeclarativeItem *)
+    {
+        Q_Q(QDeclarativeBasePositioner);
+        q->prePositioning();
+    }
+
+    void itemDestroyed(QDeclarativeItem *item)
+    {
+        Q_Q(QDeclarativeBasePositioner);
+        q->positionedItems.removeOne(QDeclarativeBasePositioner::PositionedItem(item));
+    }
+};
+
+QT_END_NAMESPACE
+#endif