summaryrefslogtreecommitdiffstats
path: root/src/declarative/util/qdeclarativeview.cpp
blob: 0e31a20cc5e05a17e168a1ebef28b682ae50d70c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qdeclarativeview.h"

#include <qdeclarative.h>
#include <qdeclarativeitem.h>
#include <qdeclarativeengine.h>
#include <qdeclarativecontext.h>
#include <qdeclarativeglobal_p.h>
#include <qdeclarativeguard_p.h>

#include <private/qdeclarativedebugtrace_p.h>

#include <qscriptvalueiterator.h>
#include <qdebug.h>
#include <qtimer.h>
#include <qevent.h>
#include <qdir.h>
#include <qcoreapplication.h>
#include <qfontdatabase.h>
#include <qicon.h>
#include <qurl.h>
#include <qlayout.h>
#include <qwidget.h>
#include <qgraphicswidget.h>
#include <qbasictimer.h>
#include <QtCore/qabstractanimation.h>
#include <private/qgraphicsview_p.h>
#include <private/qdeclarativeitem_p.h>
#include <private/qabstractanimation_p.h>
#include <private/qdeclarativeitemchangelistener_p.h>

QT_BEGIN_NAMESPACE

DEFINE_BOOL_CONFIG_OPTION(frameRateDebug, QML_SHOW_FRAMERATE)
extern Q_GUI_EXPORT bool qt_applefontsmoothing_enabled;

class QDeclarativeScene : public QGraphicsScene
{
public:
    QDeclarativeScene();

protected:
    virtual void keyPressEvent(QKeyEvent *);
    virtual void keyReleaseEvent(QKeyEvent *);

    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *);
    virtual void mousePressEvent(QGraphicsSceneMouseEvent *);
    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *);
};

QDeclarativeScene::QDeclarativeScene()
{
}

void QDeclarativeScene::keyPressEvent(QKeyEvent *e)
{
    QDeclarativeDebugTrace::addEvent(QDeclarativeDebugTrace::Key);

    QGraphicsScene::keyPressEvent(e);
}

void QDeclarativeScene::keyReleaseEvent(QKeyEvent *e)
{
    QDeclarativeDebugTrace::addEvent(QDeclarativeDebugTrace::Key);

    QGraphicsScene::keyReleaseEvent(e);
}

void QDeclarativeScene::mouseMoveEvent(QGraphicsSceneMouseEvent *e)
{
    QDeclarativeDebugTrace::addEvent(QDeclarativeDebugTrace::Mouse);

    QGraphicsScene::mouseMoveEvent(e);
}

void QDeclarativeScene::mousePressEvent(QGraphicsSceneMouseEvent *e)
{
    QDeclarativeDebugTrace::addEvent(QDeclarativeDebugTrace::Mouse);

    QGraphicsScene::mousePressEvent(e);
}

void QDeclarativeScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *e)
{
    QDeclarativeDebugTrace::addEvent(QDeclarativeDebugTrace::Mouse);

    QGraphicsScene::mouseReleaseEvent(e);
}

class QDeclarativeViewPrivate : public QGraphicsViewPrivate, public QDeclarativeItemChangeListener
{
    Q_DECLARE_PUBLIC(QDeclarativeView)
public:
    QDeclarativeViewPrivate()
        : root(0), declarativeItemRoot(0), graphicsWidgetRoot(0), component(0), resizeMode(QDeclarativeView::SizeViewToRootObject), initialSize(0,0) {}
    ~QDeclarativeViewPrivate() { delete root; delete engine; }
    void execute();
    void itemGeometryChanged(QDeclarativeItem *item, const QRectF &newGeometry, const QRectF &oldGeometry);
    void initResize();
    void updateSize();
    inline QSize rootObjectSize() const;

    QDeclarativeGuard<QGraphicsObject> root;
    QDeclarativeGuard<QDeclarativeItem> declarativeItemRoot;
    QDeclarativeGuard<QGraphicsWidget> graphicsWidgetRoot;

    QUrl source;

    QDeclarativeEngine* engine;
    QDeclarativeComponent *component;
    QBasicTimer resizetimer;

    QDeclarativeView::ResizeMode resizeMode;
    QSize initialSize;
    QElapsedTimer frameTimer;

    void init();

    QDeclarativeScene scene;
};

void QDeclarativeViewPrivate::execute()
{
    Q_Q(QDeclarativeView);
    if (root) {
        delete root;
        root = 0;
    }
    if (component) {
        delete component;
        component = 0;
    }
    if (!source.isEmpty()) {
        component = new QDeclarativeComponent(engine, source, q);
        if (!component->isLoading()) {
            q->continueExecute();
        } else {
            QObject::connect(component, SIGNAL(statusChanged(QDeclarativeComponent::Status)), q, SLOT(continueExecute()));
        }
    }
}

void QDeclarativeViewPrivate::itemGeometryChanged(QDeclarativeItem *resizeItem, const QRectF &newGeometry, const QRectF &oldGeometry)
{
    Q_Q(QDeclarativeView);
    if (resizeItem == root && resizeMode == QDeclarativeView::SizeViewToRootObject) {
        // wait for both width and height to be changed
        resizetimer.start(0,q);
    }
    QDeclarativeItemChangeListener::itemGeometryChanged(resizeItem, newGeometry, oldGeometry);
}

/*!
    \class QDeclarativeView
  \since 4.7
    \brief The QDeclarativeView class provides a widget for displaying a Qt Declarative user interface.

    QDeclarativeItem objects can be placed on a standard QGraphicsScene and 
    displayed with QGraphicsView. QDeclarativeView is a QGraphicsView subclass 
    provided as a convenience for displaying QML files, and connecting between 
    QML and C++ Qt objects.

    QDeclarativeView provides:

    \list
    \o Management of QDeclarativeComponent loading and object creation
    \o Initialization of QGraphicsView for optimal performance with QML using these settings:
        \list
        \o QGraphicsView::setOptimizationFlags(QGraphicsView::DontSavePainterState)
        \o QGraphicsView::setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate)
        \o QGraphicsScene::setItemIndexMethod(QGraphicsScene::NoIndex)
        \endlist
    \o Initialization of QGraphicsView for QML key handling using these settings:
        \list
        \o QGraphicsView::viewport()->setFocusPolicy(Qt::NoFocus)
        \o QGraphicsView::setFocusPolicy(Qt::StrongFocus)
        \o QGraphicsScene::setStickyFocus(true)
        \endlist
    \endlist

    Typical usage:

    \code
    QDeclarativeView *view = new QDeclarativeView;
    view->setSource(QUrl::fromLocalFile("myqmlfile.qml"));
    view->show();
    \endcode

    Since QDeclarativeView is a QWidget-based class, it can be used to
    display QML interfaces within QWidget-based GUI applications that do not
    use the Graphics View framework.

    To receive errors related to loading and executing QML with QDeclarativeView,
    you can connect to the statusChanged() signal and monitor for QDeclarativeView::Error.
    The errors are available via QDeclarativeView::errors().

    \sa {Integrating QML with existing Qt UI code}, {Using QML in C++ Applications}
*/


/*! \fn void QDeclarativeView::sceneResized(QSize size)
  This signal is emitted when the view is resized to \a size.
*/

/*! \fn void QDeclarativeView::statusChanged(QDeclarativeView::Status status)
    This signal is emitted when the component's current \a status changes.
*/

/*!
  \fn QDeclarativeView::QDeclarativeView(QWidget *parent)
  
  Constructs a QDeclarativeView with the given \a parent.
*/
QDeclarativeView::QDeclarativeView(QWidget *parent)
    : QGraphicsView(*(new QDeclarativeViewPrivate), parent)
{
    Q_D(QDeclarativeView);
    setSizePolicy(QSizePolicy::Preferred,QSizePolicy::Preferred);
    d->init();
}

/*!
  \fn QDeclarativeView::QDeclarativeView(const QUrl &source, QWidget *parent)

  Constructs a QDeclarativeView with the given QML \a source and \a parent.
*/
QDeclarativeView::QDeclarativeView(const QUrl &source, QWidget *parent)
    : QGraphicsView(*(new QDeclarativeViewPrivate), parent)
{
    Q_D(QDeclarativeView);
    setSizePolicy(QSizePolicy::Preferred,QSizePolicy::Preferred);
    d->init();
    setSource(source);
}

void QDeclarativeViewPrivate::init()
{
    Q_Q(QDeclarativeView);
    engine = new QDeclarativeEngine();
    q->setScene(&scene);

    q->setOptimizationFlags(QGraphicsView::DontSavePainterState);
    q->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    q->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    q->setFrameStyle(0);

    // These seem to give the best performance
    q->setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
    scene.setItemIndexMethod(QGraphicsScene::NoIndex);
    q->viewport()->setFocusPolicy(Qt::NoFocus);
    q->setFocusPolicy(Qt::StrongFocus);

    scene.setStickyFocus(true);  //### needed for correct focus handling
}

/*!
    Destroys the view.
 */
QDeclarativeView::~QDeclarativeView()
{
}

/*! \property QDeclarativeView::source
  \brief The URL of the source of the QML component.

  Changing this property causes the QML component to be reloaded.

    Ensure that the URL provided is full and correct, in particular, use
    \l QUrl::fromLocalFile() when loading a file from the local filesystem.
 */

/*!
    Sets the source to the \a url, loads the QML component and instantiates it.

    Ensure that the URL provided is full and correct, in particular, use
    \l QUrl::fromLocalFile() when loading a file from the local filesystem.

    Calling this methods multiple times with the same url will result
    in the QML being reloaded.
 */
void QDeclarativeView::setSource(const QUrl& url)
{
    Q_D(QDeclarativeView);
    d->source = url;
    d->execute();
}

/*!
  Returns the source URL, if set.

  \sa setSource()
 */
QUrl QDeclarativeView::source() const
{
    Q_D(const QDeclarativeView);
    return d->source;
}

/*!
  Returns a pointer to the QDeclarativeEngine used for instantiating
  QML Components.
 */
QDeclarativeEngine* QDeclarativeView::engine() const
{
    Q_D(const QDeclarativeView);
    return d->engine;
}

/*!
  This function returns the root of the context hierarchy.  Each QML
  component is instantiated in a QDeclarativeContext.  QDeclarativeContext's are
  essential for passing data to QML components.  In QML, contexts are
  arranged hierarchically and this hierarchy is managed by the
  QDeclarativeEngine.
 */
QDeclarativeContext* QDeclarativeView::rootContext() const
{
    Q_D(const QDeclarativeView);
    return d->engine->rootContext();
}

/*!
  \enum QDeclarativeView::Status
    Specifies the loading status of the QDeclarativeView.

    \value Null This QDeclarativeView has no source set.
    \value Ready This QDeclarativeView has loaded and created the QML component.
    \value Loading This QDeclarativeView is loading network data.
    \value Error An error has occurred.  Call errorDescription() to retrieve a description.
*/

/*! \enum QDeclarativeView::ResizeMode

  This enum specifies how to resize the view.

  \value SizeViewToRootObject The view resizes with the root item in the QML.
  \value SizeRootObjectToView The view will automatically resize the root item to the size of the view.
*/

/*!
    \property QDeclarativeView::status
    The component's current \l{QDeclarativeView::Status} {status}.
*/

QDeclarativeView::Status QDeclarativeView::status() const
{
    Q_D(const QDeclarativeView);
    if (!d->component)
        return QDeclarativeView::Null;

    return QDeclarativeView::Status(d->component->status());
}

/*!
    Return the list of errors that occurred during the last compile or create
    operation.  When the status is not Error, an empty list is returned.
*/
QList<QDeclarativeError> QDeclarativeView::errors() const
{
    Q_D(const QDeclarativeView);
    if (d->component)
        return d->component->errors();
    return QList<QDeclarativeError>();
}

/*!
    \property QDeclarativeView::resizeMode
    \brief whether the view should resize the canvas contents

    If this property is set to SizeViewToRootObject (the default), the view
    resizes with the root item in the QML.

    If this property is set to SizeRootObjectToView, the view will
    automatically resize the root item.

    Regardless of this property, the sizeHint of the view
    is the initial size of the root item. Note though that
    since QML may load dynamically, that size may change.
*/

void QDeclarativeView::setResizeMode(ResizeMode mode)
{
    Q_D(QDeclarativeView);
    if (d->resizeMode == mode)
        return;

    if (d->declarativeItemRoot) {
        if (d->resizeMode == SizeViewToRootObject) {
            QDeclarativeItemPrivate *p =
                static_cast<QDeclarativeItemPrivate *>(QGraphicsItemPrivate::get(d->declarativeItemRoot));
            p->removeItemChangeListener(d, QDeclarativeItemPrivate::Geometry);
        }
    } else if (d->graphicsWidgetRoot) {
         if (d->resizeMode == QDeclarativeView::SizeViewToRootObject) {
             d->graphicsWidgetRoot->removeEventFilter(this);
         }
    }

    d->resizeMode = mode;
    if (d->root) {
        d->initResize();
    }
}

void QDeclarativeViewPrivate::initResize()
{
    Q_Q(QDeclarativeView);
    if (declarativeItemRoot) {
        if (resizeMode == QDeclarativeView::SizeViewToRootObject) {
            QDeclarativeItemPrivate *p =
                static_cast<QDeclarativeItemPrivate *>(QGraphicsItemPrivate::get(declarativeItemRoot));
            p->addItemChangeListener(this, QDeclarativeItemPrivate::Geometry);
        }
    } else if (graphicsWidgetRoot) {
        if (resizeMode == QDeclarativeView::SizeViewToRootObject) {
            graphicsWidgetRoot->installEventFilter(q);
        }
    }
    updateSize();
}

void QDeclarativeViewPrivate::updateSize()
{
    Q_Q(QDeclarativeView);
    if (!root)
        return;
    if (declarativeItemRoot) {
        if (resizeMode == QDeclarativeView::SizeViewToRootObject) {
            QSize newSize = QSize(declarativeItemRoot->width(), declarativeItemRoot->height());
            if (newSize.isValid() && newSize != q->size()) {
                q->resize(newSize);
            }
        } else if (resizeMode == QDeclarativeView::SizeRootObjectToView) {
            if (!qFuzzyCompare(q->width(), declarativeItemRoot->width()))
                declarativeItemRoot->setWidth(q->width());
            if (!qFuzzyCompare(q->height(), declarativeItemRoot->height()))
                declarativeItemRoot->setHeight(q->height());
        }
    } else if (graphicsWidgetRoot) {
        if (resizeMode == QDeclarativeView::SizeViewToRootObject) {
            QSize newSize = QSize(graphicsWidgetRoot->size().width(), graphicsWidgetRoot->size().height());
            if (newSize.isValid() && newSize != q->size()) {
                q->resize(newSize);
            }
        } else if (resizeMode == QDeclarativeView::SizeRootObjectToView) {
            QSizeF newSize = QSize(q->size().width(), q->size().height());
            if (newSize.isValid() && newSize != graphicsWidgetRoot->size()) {
                graphicsWidgetRoot->resize(newSize);
            }
        }
    }
    q->updateGeometry();
}

QSize QDeclarativeViewPrivate::rootObjectSize() const
{
    QSize rootObjectSize(0,0);
    int widthCandidate = -1;
    int heightCandidate = -1;
    if (root) {
        QSizeF size = root->boundingRect().size();
        widthCandidate = size.width();
        heightCandidate = size.height();
    }
    if (widthCandidate > 0) {
        rootObjectSize.setWidth(widthCandidate);
    }
    if (heightCandidate > 0) {
        rootObjectSize.setHeight(heightCandidate);
    }
    return rootObjectSize;
}

QDeclarativeView::ResizeMode QDeclarativeView::resizeMode() const
{
    Q_D(const QDeclarativeView);
    return d->resizeMode;
}

/*!
  \internal
 */
void QDeclarativeView::continueExecute()
{
    Q_D(QDeclarativeView);
    disconnect(d->component, SIGNAL(statusChanged(QDeclarativeComponent::Status)), this, SLOT(continueExecute()));

    if (d->component->isError()) {
        QList<QDeclarativeError> errorList = d->component->errors();
        foreach (const QDeclarativeError &error, errorList) {
            qWarning() << error;
        }
        emit statusChanged(status());
        return;
    }

    QObject *obj = d->component->create();

    if(d->component->isError()) {
        QList<QDeclarativeError> errorList = d->component->errors();
        foreach (const QDeclarativeError &error, errorList) {
            qWarning() << error;
        }
        emit statusChanged(status());
        return;
    }

    setRootObject(obj);
    emit statusChanged(status());
}


/*!
  \internal
*/
void QDeclarativeView::setRootObject(QObject *obj)
{
    Q_D(QDeclarativeView);
    if (d->root == obj)
        return;
    if (QDeclarativeItem *declarativeItem = qobject_cast<QDeclarativeItem *>(obj)) {
        d->scene.addItem(declarativeItem);
        d->root = declarativeItem;
        d->declarativeItemRoot = declarativeItem;
    } else if (QGraphicsObject *graphicsObject = qobject_cast<QGraphicsObject *>(obj)) {
        d->scene.addItem(graphicsObject);
        d->root = graphicsObject;
        if (graphicsObject->isWidget()) {
            d->graphicsWidgetRoot = static_cast<QGraphicsWidget*>(graphicsObject);
        } else {
            qWarning() << "QDeclarativeView::resizeMode is not honored for components of type QGraphicsObject";
        }
    } else if (obj) {
        qWarning() << "QDeclarativeView only supports loading of root objects that derive from QGraphicsObject";
        if (QWidget* widget  = qobject_cast<QWidget *>(obj)) {
            window()->setAttribute(Qt::WA_OpaquePaintEvent, false);
            window()->setAttribute(Qt::WA_NoSystemBackground, false);
            if (layout() && layout()->count()) {
                // Hide the QGraphicsView in GV mode.
                QLayoutItem *item = layout()->itemAt(0);
                if (item->widget())
                    item->widget()->hide();
            }
            widget->setParent(this);
            if (isVisible()) {
                widget->setVisible(true);
            }
            resize(widget->size());
        }
    }

    if (d->root) {
        d->initialSize = d->rootObjectSize();
        if (d->initialSize != size()) {
            if (!(parentWidget() && parentWidget()->layout())) {
                resize(d->initialSize);
            }
        }
        d->initResize();
    }
}

/*!
  \internal
  If the \l {QTimerEvent} {timer event} \a e is this
  view's resize timer, sceneResized() is emitted.
 */
void QDeclarativeView::timerEvent(QTimerEvent* e)
{
    Q_D(QDeclarativeView);
    if (!e || e->timerId() == d->resizetimer.timerId()) {
        d->updateSize();
        d->resizetimer.stop();
    }
}

/*! \internal */
bool QDeclarativeView::eventFilter(QObject *watched, QEvent *e)
{
    Q_D(QDeclarativeView);
    if (watched == d->root && d->resizeMode == SizeViewToRootObject) {
        if (d->graphicsWidgetRoot) {
            if (e->type() == QEvent::GraphicsSceneResize) {
                d->updateSize();
            }
        }
    }
    return QGraphicsView::eventFilter(watched, e);
}

/*!
    \internal
    Preferred size follows the root object geometry.
*/
QSize QDeclarativeView::sizeHint() const
{
    Q_D(const QDeclarativeView);
    QSize rootObjectSize = d->rootObjectSize();
    if (rootObjectSize.isEmpty()) {
        return size();
    } else {
        return rootObjectSize;
    }
}

/*!
  Returns the initial size of the root object
*/
QSize QDeclarativeView::initialSize() const
{
    Q_D(const QDeclarativeView);
    return d->initialSize;
}

/*!
  Returns the view's root \l {QGraphicsObject} {item}.
 */
QGraphicsObject *QDeclarativeView::rootObject() const
{
    Q_D(const QDeclarativeView);
    return d->root;
}

/*!
  \internal
  This function handles the \l {QResizeEvent} {resize event}
  \a e.
 */
void QDeclarativeView::resizeEvent(QResizeEvent *e)
{
    Q_D(QDeclarativeView);
    if (d->resizeMode == SizeRootObjectToView) {
        d->updateSize();
    }
    if (d->declarativeItemRoot) {
        setSceneRect(QRectF(0, 0, d->declarativeItemRoot->width(), d->declarativeItemRoot->height()));
    } else if (d->root) {
        setSceneRect(d->root->boundingRect());
    } else {
        setSceneRect(rect());
    }
    emit sceneResized(e->size());
    QGraphicsView::resizeEvent(e);
}

/*!
    \internal
*/
void QDeclarativeView::paintEvent(QPaintEvent *event)
{
    Q_D(QDeclarativeView);

    QDeclarativeDebugTrace::addEvent(QDeclarativeDebugTrace::FramePaint);
    QDeclarativeDebugTrace::startRange(QDeclarativeDebugTrace::Painting);

    int time = 0;
    if (frameRateDebug()) 
        time = d->frameTimer.restart();

#ifdef Q_WS_MAC
    bool oldSmooth = qt_applefontsmoothing_enabled;
    qt_applefontsmoothing_enabled = false;
#endif
    QGraphicsView::paintEvent(event);
#ifdef Q_WS_MAC
    qt_applefontsmoothing_enabled = oldSmooth;
#endif

    QDeclarativeDebugTrace::endRange(QDeclarativeDebugTrace::Painting);

    if (frameRateDebug())
        qDebug() << "paintEvent:" << d->frameTimer.elapsed() << "time since last frame:" << time;
}

QT_END_NAMESPACE