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42 #ifndef QQUICKPOSITIONERS_P_P_H
43 #define QQUICKPOSITIONERS_P_P_H
49 // This file is not part of the Qt API. It exists purely as an
50 // implementation detail. This header file may change from version to
51 // version without notice, or even be removed.
56 #include "qquickpositioners_p.h"
57 #include "qquickimplicitsizeitem_p_p.h"
59 #include <QtQuick/private/qquickstate_p.h>
60 #include <private/qquicktransitionmanager_p_p.h>
61 #include <private/qquickstatechangescript_p.h>
63 #include <QtCore/qobject.h>
64 #include <QtCore/qstring.h>
65 #include <QtCore/qtimer.h>
69 class QQuickItemViewTransitioner;
71 class QQuickBasePositionerPrivate : public QQuickImplicitSizeItemPrivate, public QQuickItemChangeListener
73 Q_DECLARE_PUBLIC(QQuickBasePositioner)
76 QQuickBasePositionerPrivate()
77 : spacing(0), type(QQuickBasePositioner::None)
78 , transitioner(0), positioningDirty(false)
79 , doingPositioning(false), anchorConflict(false), layoutDirection(Qt::LeftToRight)
83 void init(QQuickBasePositioner::PositionerType at)
86 childrenDoNotOverlap = true;
91 QQuickBasePositioner::PositionerType type;
92 QQuickItemViewTransitioner *transitioner;
94 void watchChanges(QQuickItem *other);
95 void unwatchChanges(QQuickItem* other);
96 void setPositioningDirty() {
97 Q_Q(QQuickBasePositioner);
98 if (!positioningDirty) {
99 positioningDirty = true;
104 bool positioningDirty : 1;
105 bool doingPositioning : 1;
106 bool anchorConflict : 1;
108 Qt::LayoutDirection layoutDirection;
110 void mirrorChange() {
111 Q_Q(QQuickBasePositioner);
112 if (type != QQuickBasePositioner::Vertical)
113 q->prePositioning(); //Don't postpone, as it might be the only trigger for visible changes.
115 bool isLeftToRight() const {
116 if (type == QQuickBasePositioner::Vertical)
119 return effectiveLayoutMirror ? layoutDirection == Qt::RightToLeft : layoutDirection == Qt::LeftToRight;
122 virtual void itemSiblingOrderChanged(QQuickItem* other)
125 setPositioningDirty();
128 void itemGeometryChanged(QQuickItem *, const QRectF &newGeometry, const QRectF &oldGeometry)
130 if (newGeometry.size() != oldGeometry.size())
131 setPositioningDirty();
134 virtual void itemVisibilityChanged(QQuickItem *)
136 setPositioningDirty();
139 void itemDestroyed(QQuickItem *item)
141 Q_Q(QQuickBasePositioner);
142 q->positionedItems.removeOne(QQuickBasePositioner::PositionedItem(item));
145 static Qt::LayoutDirection getLayoutDirection(const QQuickBasePositioner *positioner)
147 return positioner->d_func()->layoutDirection;
150 static Qt::LayoutDirection getEffectiveLayoutDirection(const QQuickBasePositioner *positioner)
152 if (positioner->d_func()->effectiveLayoutMirror)
153 return positioner->d_func()->layoutDirection == Qt::RightToLeft ? Qt::LeftToRight : Qt::RightToLeft;
155 return positioner->d_func()->layoutDirection;
161 #endif // QQUICKPOSITIONERS_P_P_H