1 // Commit: 2c7cab4172f1acc86fd49345a2847417e162f2c3
2 /****************************************************************************
4 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
5 ** Contact: http://www.qt-project.org/
7 ** This file is part of the QtDeclarative module of the Qt Toolkit.
9 ** $QT_BEGIN_LICENSE:LGPL$
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20 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
22 ** GNU General Public License Usage
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24 ** Public License version 3.0 as published by the Free Software Foundation
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41 ****************************************************************************/
43 #ifndef QQUICKPOSITIONERS_P_P_H
44 #define QQUICKPOSITIONERS_P_P_H
50 // This file is not part of the Qt API. It exists purely as an
51 // implementation detail. This header file may change from version to
52 // version without notice, or even be removed.
57 #include "qquickpositioners_p.h"
58 #include "qquickimplicitsizeitem_p_p.h"
60 #include <QtQuick/private/qdeclarativestate_p.h>
61 #include <private/qdeclarativetransitionmanager_p_p.h>
62 #include <private/qdeclarativestateoperations_p.h>
64 #include <QtCore/qobject.h>
65 #include <QtCore/qstring.h>
66 #include <QtCore/qtimer.h>
70 class QQuickBasePositionerPrivate : public QQuickImplicitSizeItemPrivate, public QQuickItemChangeListener
72 Q_DECLARE_PUBLIC(QQuickBasePositioner)
75 QQuickBasePositionerPrivate()
76 : spacing(0), type(QQuickBasePositioner::None)
77 , moveTransition(0), addTransition(0), positioningDirty(false)
78 , doingPositioning(false), anchorConflict(false), layoutDirection(Qt::LeftToRight)
82 void init(QQuickBasePositioner::PositionerType at)
85 childrenDoNotOverlap = true;
90 QQuickBasePositioner::PositionerType type;
91 QDeclarativeTransition *moveTransition;
92 QDeclarativeTransition *addTransition;
93 QDeclarativeStateOperation::ActionList addActions;
94 QDeclarativeStateOperation::ActionList moveActions;
95 QDeclarativeTransitionManager addTransitionManager;
96 QDeclarativeTransitionManager moveTransitionManager;
98 void watchChanges(QQuickItem *other);
99 void unwatchChanges(QQuickItem* other);
100 void setPositioningDirty() {
101 Q_Q(QQuickBasePositioner);
102 if (!positioningDirty) {
103 positioningDirty = true;
108 bool positioningDirty : 1;
109 bool doingPositioning : 1;
110 bool anchorConflict : 1;
112 Qt::LayoutDirection layoutDirection;
114 void mirrorChange() {
115 Q_Q(QQuickBasePositioner);
116 if (type != QQuickBasePositioner::Vertical)
117 q->prePositioning(); //Don't postpone, as it might be the only trigger for visible changes.
119 bool isLeftToRight() const {
120 if (type == QQuickBasePositioner::Vertical)
123 return effectiveLayoutMirror ? layoutDirection == Qt::RightToLeft : layoutDirection == Qt::LeftToRight;
126 virtual void itemSiblingOrderChanged(QQuickItem* other)
129 setPositioningDirty();
132 void itemGeometryChanged(QQuickItem *, const QRectF &newGeometry, const QRectF &oldGeometry)
134 if (newGeometry.size() != oldGeometry.size())
135 setPositioningDirty();
138 virtual void itemVisibilityChanged(QQuickItem *)
140 setPositioningDirty();
143 void itemDestroyed(QQuickItem *item)
145 Q_Q(QQuickBasePositioner);
146 q->positionedItems.removeOne(QQuickBasePositioner::PositionedItem(item));
149 static Qt::LayoutDirection getLayoutDirection(const QQuickBasePositioner *positioner)
151 return positioner->d_func()->layoutDirection;
154 static Qt::LayoutDirection getEffectiveLayoutDirection(const QQuickBasePositioner *positioner)
156 if (positioner->d_func()->effectiveLayoutMirror)
157 return positioner->d_func()->layoutDirection == Qt::RightToLeft ? Qt::LeftToRight : Qt::RightToLeft;
159 return positioner->d_func()->layoutDirection;
165 #endif // QQUICKPOSITIONERS_P_P_H