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36
37#ifndef QQUICKTUMBLER_P_P_H
38#define QQUICKTUMBLER_P_P_H
39
40//
41// W A R N I N G
42// -------------
43//
44// This file is not part of the Qt API. It exists purely as an
45// implementation detail. This header file may change from version to
46// version without notice, or even be removed.
47//
48// We mean it.
49//
50
51#include <QtQuickTemplates2/private/qquickcontrol_p_p.h>
52#include <QtQuickTemplates2/private/qquicktumbler_p.h>
53
54QT_BEGIN_NAMESPACE
55
56class Q_QUICKTEMPLATES2_PRIVATE_EXPORT QQuickTumblerPrivate : public QQuickControlPrivate
57{
58 Q_DECLARE_PUBLIC(QQuickTumbler)
59
60public:
61 enum ContentItemType {
62 NoContentItem,
63 UnsupportedContentItemType,
64 PathViewContentItem,
65 ListViewContentItem
66 };
67
68 QQuickItem *determineViewType(QQuickItem *contentItem);
69 void resetViewData();
70 QList<QQuickItem *> viewContentItemChildItems() const;
71
72 static QQuickTumblerPrivate *get(QQuickTumbler *tumbler);
73
74 QVariant model;
75 QQmlComponent *delegate = nullptr;
76 int visibleItemCount = 5;
77 bool wrap = true;
78 bool explicitWrap = false;
79 bool modelBeingSet = false;
80 bool currentIndexSetDuringModelChange = false;
81 QQuickItem *view = nullptr;
82 QQuickItem *viewContentItem = nullptr;
83 ContentItemType viewContentItemType = UnsupportedContentItemType;
84 union {
85 qreal viewOffset; // PathView
86 qreal viewContentY; // ListView
87 };
88 int currentIndex = -1;
89 int pendingCurrentIndex = -1;
90 bool ignoreCurrentIndexChanges = false;
91 int count = 0;
92 bool ignoreSignals = false;
93
94 void _q_updateItemHeights();
95 void _q_updateItemWidths();
96 void _q_onViewCurrentIndexChanged();
97 void _q_onViewCountChanged();
98 void _q_onViewOffsetChanged();
99 void _q_onViewContentYChanged();
100
101 void calculateDisplacements();
102
103 void disconnectFromView();
104 void setupViewData(QQuickItem *newControlContentItem);
105 void warnAboutIncorrectContentItem();
106 void syncCurrentIndex();
107 void setPendingCurrentIndex(int index);
108
109 enum PropertyChangeReason {
110 UserChange,
111 InternalChange
112 };
113
114 static QString propertyChangeReasonToString(PropertyChangeReason changeReason);
115
116 void setCurrentIndex(int newCurrentIndex, PropertyChangeReason changeReason = InternalChange);
117 void setCount(int newCount);
118 void setWrapBasedOnCount();
119 void setWrap(bool shouldWrap, bool isExplicit);
120 void beginSetModel();
121 void endSetModel();
122
123 void itemChildAdded(QQuickItem *, QQuickItem *) override;
124 void itemChildRemoved(QQuickItem *, QQuickItem *) override;
125 void itemGeometryChanged(QQuickItem *, QQuickGeometryChange , const QRectF &) override;
126};
127
128class QQuickTumblerAttachedPrivate : public QObjectPrivate
129{
130 Q_DECLARE_PUBLIC(QQuickTumblerAttached)
131
132public:
133 static QQuickTumblerAttachedPrivate *get(QQuickTumblerAttached *attached)
134 {
135 return attached->d_func();
136 }
137
138 void init(QQuickItem *delegateItem);
139
140 void calculateDisplacement();
141 void emitIfDisplacementChanged(qreal oldDisplacement, qreal newDisplacement);
142
143 // The Tumbler that contains the delegate. Required to calculated the displacement.
144 QPointer<QQuickTumbler> tumbler;
145 // The index of the delegate. Used to calculate the displacement.
146 int index = -1;
147 // The displacement for our delegate.
148 qreal displacement = 0;
149};
150
151QT_END_NAMESPACE
152
153#endif // QQUICKTUMBLER_P_P_H
154

source code of qtquickcontrols2/src/quicktemplates2/qquicktumbler_p_p.h