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Diffstat (limited to 'src/declarative/items/qsgpositioners_p_p.h')
| -rw-r--r-- | src/declarative/items/qsgpositioners_p_p.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/declarative/items/qsgpositioners_p_p.h b/src/declarative/items/qsgpositioners_p_p.h new file mode 100644 index 0000000000..49de12a1fd --- /dev/null +++ b/src/declarative/items/qsgpositioners_p_p.h @@ -0,0 +1,174 @@ +// Commit: 2c7cab4172f1acc86fd49345a2847417e162f2c3 +/**************************************************************************** +** +** Copyright (C) 2011 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 QSGPOSITIONERS_P_P_H +#define QSGPOSITIONERS_P_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 "qsgpositioners_p.h" +#include "qsgimplicitsizeitem_p_p.h" + +#include <private/qdeclarativestate_p.h> +#include <private/qdeclarativetransitionmanager_p_p.h> +#include <private/qdeclarativestateoperations_p.h> + +#include <QtCore/qobject.h> +#include <QtCore/qstring.h> +#include <QtCore/qtimer.h> + +QT_BEGIN_NAMESPACE + +class QSGBasePositionerPrivate : public QSGImplicitSizeItemPrivate, public QSGItemChangeListener +{ + Q_DECLARE_PUBLIC(QSGBasePositioner) + +public: + QSGBasePositionerPrivate() + : spacing(0), type(QSGBasePositioner::None) + , moveTransition(0), addTransition(0), queuedPositioning(false) + , doingPositioning(false), anchorConflict(false), layoutDirection(Qt::LeftToRight) + { + } + + void init(QSGBasePositioner::PositionerType at) + { + type = at; + childrenDoNotOverlap = true; + } + + int spacing; + + QSGBasePositioner::PositionerType type; + QDeclarativeTransition *moveTransition; + QDeclarativeTransition *addTransition; + QDeclarativeStateOperation::ActionList addActions; + QDeclarativeStateOperation::ActionList moveActions; + QDeclarativeTransitionManager addTransitionManager; + QDeclarativeTransitionManager moveTransitionManager; + + void watchChanges(QSGItem *other); + void unwatchChanges(QSGItem* other); + bool queuedPositioning : 1; + bool doingPositioning : 1; + bool anchorConflict : 1; + + Qt::LayoutDirection layoutDirection; + + void schedulePositioning() + { + Q_Q(QSGBasePositioner); + if(!queuedPositioning){ + QTimer::singleShot(0,q,SLOT(prePositioning())); + queuedPositioning = true; + } + } + + void mirrorChange() { + Q_Q(QSGBasePositioner); + if (type != QSGBasePositioner::Vertical) + q->prePositioning(); + } + bool isLeftToRight() const { + if (type == QSGBasePositioner::Vertical) + return true; + else + return effectiveLayoutMirror ? layoutDirection == Qt::RightToLeft : layoutDirection == Qt::LeftToRight; + } + + virtual void itemSiblingOrderChanged(QSGItem* other) + { + Q_UNUSED(other); + //Delay is due to many children often being reordered at once + //And we only want to reposition them all once + schedulePositioning(); + } + + void itemGeometryChanged(QSGItem *, const QRectF &newGeometry, const QRectF &oldGeometry) + { + Q_Q(QSGBasePositioner); + if (newGeometry.size() != oldGeometry.size()) + q->prePositioning(); + } + + virtual void itemVisibilityChanged(QSGItem *) + { + schedulePositioning(); + } + virtual void itemOpacityChanged(QSGItem *) + { + Q_Q(QSGBasePositioner); + q->prePositioning(); + } + + void itemDestroyed(QSGItem *item) + { + Q_Q(QSGBasePositioner); + q->positionedItems.removeOne(QSGBasePositioner::PositionedItem(item)); + } + + static Qt::LayoutDirection getLayoutDirection(const QSGBasePositioner *positioner) + { + return positioner->d_func()->layoutDirection; + } + + static Qt::LayoutDirection getEffectiveLayoutDirection(const QSGBasePositioner *positioner) + { + if (positioner->d_func()->effectiveLayoutMirror) + return positioner->d_func()->layoutDirection == Qt::RightToLeft ? Qt::LeftToRight : Qt::RightToLeft; + else + return positioner->d_func()->layoutDirection; + } +}; + +QT_END_NAMESPACE + +#endif // QSGPOSITIONERS_P_P_H |