| 1 | // Copyright (C) 2018 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #ifndef QQMLPREVIEWHANDLER_H |
| 5 | #define QQMLPREVIEWHANDLER_H |
| 6 | |
| 7 | // |
| 8 | // W A R N I N G |
| 9 | // ------------- |
| 10 | // |
| 11 | // This file is not part of the Qt API. It exists purely as an |
| 12 | // implementation detail. This header file may change from version to |
| 13 | // version without notice, or even be removed. |
| 14 | // |
| 15 | // We mean it. |
| 16 | // |
| 17 | |
| 18 | #include "qqmlpreviewposition.h" |
| 19 | |
| 20 | #include <QtCore/qobject.h> |
| 21 | #include <QtCore/qvector.h> |
| 22 | #include <QtCore/qrect.h> |
| 23 | #include <QtCore/qpointer.h> |
| 24 | #include <QtCore/qelapsedtimer.h> |
| 25 | #include <QtQml/qqmlengine.h> |
| 26 | |
| 27 | QT_BEGIN_NAMESPACE |
| 28 | |
| 29 | class QQmlEngine; |
| 30 | class QQuickItem; |
| 31 | class QQmlPreviewUrlInterceptor; |
| 32 | class QQuickWindow; |
| 33 | |
| 34 | class QQmlPreviewHandler : public QObject |
| 35 | { |
| 36 | Q_OBJECT |
| 37 | public: |
| 38 | explicit QQmlPreviewHandler(QObject *parent = nullptr); |
| 39 | ~QQmlPreviewHandler(); |
| 40 | |
| 41 | QQuickItem *currentRootItem(); |
| 42 | |
| 43 | void addEngine(QQmlEngine *engine); |
| 44 | void removeEngine(QQmlEngine *engine); |
| 45 | |
| 46 | void loadUrl(const QUrl &url); |
| 47 | void rerun(); |
| 48 | void zoom(qreal newFactor); |
| 49 | |
| 50 | void clear(); |
| 51 | |
| 52 | struct FpsInfo { |
| 53 | quint16 numSyncs; |
| 54 | quint16 minSync; |
| 55 | quint16 maxSync; |
| 56 | quint16 totalSync; |
| 57 | |
| 58 | quint16 numRenders; |
| 59 | quint16 minRender; |
| 60 | quint16 maxRender; |
| 61 | quint16 totalRender; |
| 62 | }; |
| 63 | |
| 64 | Q_SIGNALS: |
| 65 | void error(const QString &message); |
| 66 | void fps(const FpsInfo &info); |
| 67 | |
| 68 | protected: |
| 69 | bool eventFilter(QObject *obj, QEvent *event) override; |
| 70 | private: |
| 71 | void doZoom(); |
| 72 | void tryCreateObject(); |
| 73 | void showObject(QObject *object); |
| 74 | void setCurrentWindow(QQuickWindow *window); |
| 75 | |
| 76 | void beforeSynchronizing(); |
| 77 | void afterSynchronizing(); |
| 78 | void beforeRendering(); |
| 79 | void frameSwapped(); |
| 80 | |
| 81 | void fpsTimerHit(); |
| 82 | |
| 83 | QScopedPointer<QQuickItem> m_dummyItem; |
| 84 | QList<QQmlEngine *> m_engines; |
| 85 | QPointer<QQuickItem> m_currentRootItem; |
| 86 | QVector<QPointer<QObject>> m_createdObjects; |
| 87 | QScopedPointer<QQmlComponent> m_component; |
| 88 | QPointer<QQuickWindow> m_currentWindow; |
| 89 | qreal m_zoomFactor = 1.0; |
| 90 | bool m_supportsMultipleWindows; |
| 91 | QQmlPreviewPosition m_lastPosition; |
| 92 | |
| 93 | QTimer m_fpsTimer; |
| 94 | |
| 95 | struct FrameTime { |
| 96 | void beginFrame(); |
| 97 | void recordFrame(); |
| 98 | void endFrame(); |
| 99 | void reset(); |
| 100 | |
| 101 | QElapsedTimer timer; |
| 102 | qint64 elapsed = -1; |
| 103 | quint16 min = std::numeric_limits<quint16>::max(); |
| 104 | quint16 max = 0; |
| 105 | quint16 total = 0; |
| 106 | quint16 number = 0; |
| 107 | }; |
| 108 | |
| 109 | FrameTime m_rendering; |
| 110 | FrameTime m_synchronizing; |
| 111 | }; |
| 112 | |
| 113 | QT_END_NAMESPACE |
| 114 | |
| 115 | Q_DECLARE_METATYPE(QQmlPreviewHandler::FpsInfo) |
| 116 | |
| 117 | #endif // QQMLPREVIEWHANDLER_H |
| 118 |