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39
40#ifndef QQUICKLOADER_P_P_H
41#define QQUICKLOADER_P_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include "qquickloader_p.h"
55#include "qquickimplicitsizeitem_p_p.h"
56#include "qquickitemchangelistener_p.h"
57#include <qqmlincubator.h>
58
59#include <private/qv4value_p.h>
60
61QT_BEGIN_NAMESPACE
62
63
64class QQuickLoaderPrivate;
65class QQuickLoaderIncubator : public QQmlIncubator
66{
67public:
68 QQuickLoaderIncubator(QQuickLoaderPrivate *l, IncubationMode mode) : QQmlIncubator(mode), loader(l) {}
69
70protected:
71 void statusChanged(Status) override;
72 void setInitialState(QObject *) override;
73
74private:
75 QQuickLoaderPrivate *loader;
76};
77
78class QQmlContext;
79class QQuickLoaderPrivate : public QQuickImplicitSizeItemPrivate, public QQuickItemChangeListener
80{
81 Q_DECLARE_PUBLIC(QQuickLoader)
82
83public:
84 QQuickLoaderPrivate();
85 ~QQuickLoaderPrivate();
86
87 void itemGeometryChanged(QQuickItem *item, QQuickGeometryChange change, const QRectF &oldGeometry) override;
88 void itemImplicitWidthChanged(QQuickItem *) override;
89 void itemImplicitHeightChanged(QQuickItem *) override;
90 void clear();
91 void initResize();
92 void load();
93
94 void incubatorStateChanged(QQmlIncubator::Status status);
95 void setInitialState(QObject *o);
96 void disposeInitialPropertyValues();
97 static QUrl resolveSourceUrl(QQmlV4Function *args);
98 QV4::ReturnedValue extractInitialPropertyValues(QQmlV4Function *args, QObject *loader, bool *error);
99 QQuickLoader::Status computeStatus() const;
100 void updateStatus();
101
102 qreal getImplicitWidth() const override;
103 qreal getImplicitHeight() const override;
104
105 QUrl source;
106 QQuickItem *item;
107 QObject *object;
108 QQmlStrongJSQObjectReference<QQmlComponent> component;
109 QQmlContext *itemContext;
110 QQuickLoaderIncubator *incubator;
111 QV4::PersistentValue initialPropertyValues;
112 QV4::PersistentValue qmlCallingContext;
113 bool updatingSize: 1;
114 bool active : 1;
115 bool loadingFromSource : 1;
116 bool asynchronous : 1;
117 // We need to use char instead of QQuickLoader::Status
118 // as otherwise the size of the class would increase
119 // on 32-bit systems, as sizeof(Status) == sizeof(int)
120 // and sizeof(int) > remaining padding on 32 bit
121 char status;
122
123 void _q_sourceLoaded();
124 void _q_updateSize(bool loaderGeometryChanged = true);
125};
126
127QT_END_NAMESPACE
128
129#endif // QQUICKLOADER_P_P_H
130

source code of qtdeclarative/src/quick/items/qquickloader_p_p.h