src/declarative/items/qquickview.cpp

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  41
  42 #include "qquickview.h"
  43 #include "qquickview_p.h"
  44
  45 #include "qquickcanvas_p.h"
  46 #include "qquickitem_p.h"
  47 #include "qquickitemchangelistener_p.h"
  48
  49 #include <private/qdeclarativedebugtrace_p.h>
  50 #include <private/qdeclarativeinspectorservice_p.h>
  51
  52 #include <QtDeclarative/qdeclarativeengine.h>
  53 #include <private/qdeclarativeengine_p.h>
  54 #include <QtCore/qbasictimer.h>
  55
  56
  57 // XXX todo - This whole class should probably be merged with QDeclarativeView for
  58 // maximum seamlessness
  59 QT_BEGIN_NAMESPACE
  60
  61 DEFINE_BOOL_CONFIG_OPTION(frameRateDebug, QML_SHOW_FRAMERATE)
  62
  63 void QQuickViewPrivate::init()
  64 {
  65     Q_Q(QQuickView);
  66
  67     QDeclarativeEnginePrivate::get(&engine)->sgContext = QQuickCanvasPrivate::context;
  68
  69     engine.setIncubationController(q->incubationController());
  70
  71     if (QDeclarativeDebugService::isDebuggingEnabled())
  72         QDeclarativeInspectorService::instance()->addView(q);
  73 }
  74
  75 QQuickViewPrivate::QQuickViewPrivate()
  76     : root(0), component(0), resizeMode(QQuickView::SizeViewToRootObject), initialSize(0,0)
  77 {
  78 }
  79
  80 QQuickViewPrivate::~QQuickViewPrivate()
  81 {
  82     if (QDeclarativeDebugService::isDebuggingEnabled())
  83         QDeclarativeInspectorService::instance()->removeView(q_func());
  84
  85     delete root;
  86 }
  87
  88 void QQuickViewPrivate::execute()
  89 {
  90     Q_Q(QQuickView);
  91     if (root) {
  92         delete root;
  93         root = 0;
  94     }
  95     if (component) {
  96         delete component;
  97         component = 0;
  98     }
  99     if (!source.isEmpty()) {
 100         component = new QDeclarativeComponent(&engine, source, q);
 101         if (!component->isLoading()) {
 102             q->continueExecute();
 103         } else {
 104             QObject::connect(component, SIGNAL(statusChanged(QDeclarativeComponent::Status)),
 105                              q, SLOT(continueExecute()));
 106         }
 107     }
 108 }
 109
 110 void QQuickViewPrivate::itemGeometryChanged(QQuickItem *resizeItem, const QRectF &newGeometry, const QRectF &oldGeometry)
 111 {
 112     Q_Q(QQuickView);
 113     if (resizeItem == root && resizeMode == QQuickView::SizeViewToRootObject) {
 114         // wait for both width and height to be changed
 115         resizetimer.start(0,q);
 116     }
 117     QQuickItemChangeListener::itemGeometryChanged(resizeItem, newGeometry, oldGeometry);
 118 }
 119
 120 QQuickView::QQuickView(QWindow *parent, Qt::WindowFlags f)
 121 : QQuickCanvas(*(new QQuickViewPrivate), parent)
 122 {
 123     setWindowFlags(f);
 124     d_func()->init();
 125 }
 126
 127 QQuickView::QQuickView(const QUrl &source, QWindow *parent, Qt::WindowFlags f)
 128 : QQuickCanvas(*(new QQuickViewPrivate), parent)
 129 {
 130     setWindowFlags(f);
 131     d_func()->init();
 132     setSource(source);
 133 }
 134
 135 QQuickView::~QQuickView()
 136 {
 137 }
 138
 139 void QQuickView::setSource(const QUrl& url)
 140 {
 141     Q_D(QQuickView);
 142     d->source = url;
 143     d->execute();
 144 }
 145
 146 QUrl QQuickView::source() const
 147 {
 148     Q_D(const QQuickView);
 149     return d->source;
 150 }
 151
 152 QDeclarativeEngine* QQuickView::engine() const
 153 {
 154     Q_D(const QQuickView);
 155     return const_cast<QDeclarativeEngine *>(&d->engine);
 156 }
 157
 158 QDeclarativeContext* QQuickView::rootContext() const
 159 {
 160     Q_D(const QQuickView);
 161     return d->engine.rootContext();
 162 }
 163
 164 QQuickView::Status QQuickView::status() const
 165 {
 166     Q_D(const QQuickView);
 167     if (!d->component)
 168         return QQuickView::Null;
 169
 170     return QQuickView::Status(d->component->status());
 171 }
 172
 173 QList<QDeclarativeError> QQuickView::errors() const
 174 {
 175     Q_D(const QQuickView);
 176     if (d->component)
 177         return d->component->errors();
 178     return QList<QDeclarativeError>();
 179 }
 180
 181 void QQuickView::setResizeMode(ResizeMode mode)
 182 {
 183     Q_D(QQuickView);
 184     if (d->resizeMode == mode)
 185         return;
 186
 187     if (d->root) {
 188         if (d->resizeMode == SizeViewToRootObject) {
 189             QQuickItemPrivate *p = QQuickItemPrivate::get(d->root);
 190             p->removeItemChangeListener(d, QQuickItemPrivate::Geometry);
 191         }
 192     }
 193
 194     d->resizeMode = mode;
 195     if (d->root) {
 196         d->initResize();
 197     }
 198 }
 199
 200 void QQuickViewPrivate::initResize()
 201 {
 202     if (root) {
 203         if (resizeMode == QQuickView::SizeViewToRootObject) {
 204             QQuickItemPrivate *p = QQuickItemPrivate::get(root);
 205             p->addItemChangeListener(this, QQuickItemPrivate::Geometry);
 206         }
 207     }
 208     updateSize();
 209 }
 210
 211 void QQuickViewPrivate::updateSize()
 212 {
 213     Q_Q(QQuickView);
 214     if (!root)
 215         return;
 216
 217     if (resizeMode == QQuickView::SizeViewToRootObject) {
 218         QSize newSize = QSize(root->width(), root->height());
 219         if (newSize.isValid() && newSize != q->size()) {
 220             q->resize(newSize);
 221         }
 222     } else if (resizeMode == QQuickView::SizeRootObjectToView) {
 223         if (!qFuzzyCompare(q->width(), root->width()))
 224             root->setWidth(q->width());
 225         if (!qFuzzyCompare(q->height(), root->height()))
 226             root->setHeight(q->height());
 227     }
 228 }
 229
 230 QSize QQuickViewPrivate::rootObjectSize() const
 231 {
 232     QSize rootObjectSize(0,0);
 233     int widthCandidate = -1;
 234     int heightCandidate = -1;
 235     if (root) {
 236         widthCandidate = root->width();
 237         heightCandidate = root->height();
 238     }
 239     if (widthCandidate > 0) {
 240         rootObjectSize.setWidth(widthCandidate);
 241     }
 242     if (heightCandidate > 0) {
 243         rootObjectSize.setHeight(heightCandidate);
 244     }
 245     return rootObjectSize;
 246 }
 247
 248 QQuickView::ResizeMode QQuickView::resizeMode() const
 249 {
 250     Q_D(const QQuickView);
 251     return d->resizeMode;
 252 }
 253
 254 /*!
 255   \internal
 256  */
 257 void QQuickView::continueExecute()
 258 {
 259     Q_D(QQuickView);
 260     disconnect(d->component, SIGNAL(statusChanged(QDeclarativeComponent::Status)), this, SLOT(continueExecute()));
 261
 262     if (d->component->isError()) {
 263         QList<QDeclarativeError> errorList = d->component->errors();
 264         foreach (const QDeclarativeError &error, errorList) {
 265             qWarning() << error;
 266         }
 267         emit statusChanged(status());
 268         return;
 269     }
 270
 271     QObject *obj = d->component->create();
 272
 273     if (d->component->isError()) {
 274         QList<QDeclarativeError> errorList = d->component->errors();
 275         foreach (const QDeclarativeError &error, errorList) {
 276             qWarning() << error;
 277         }
 278         emit statusChanged(status());
 279         return;
 280     }
 281
 282     d->setRootObject(obj);
 283     emit statusChanged(status());
 284 }
 285
 286
 287 /*!
 288   \internal
 289 */
 290 void QQuickViewPrivate::setRootObject(QObject *obj)
 291 {
 292     Q_Q(QQuickView);
 293     if (root == obj)
 294         return;
 295     if (QQuickItem *sgItem = qobject_cast<QQuickItem *>(obj)) {
 296         root = sgItem;
 297         sgItem->setParentItem(q->QQuickCanvas::rootItem());
 298     } else {
 299         qWarning() << "QQuickView only supports loading of root objects that derive from QQuickItem." << endl
 300                    << endl
 301                    << "If your example is using QML 2, (such as qmlscene) and the .qml file you" << endl
 302                    << "loaded has 'import QtQuick 1.0' or 'import Qt 4.7', this error will occur." << endl
 303                    << endl
 304                    << "To load files with 'import QtQuick 1.0' with QML 2, specify:" << endl
 305                    << "  QMLSCENE_IMPORT_NAME=quick1" << endl
 306                    << "on as an environment variable prior to launching the application." << endl
 307                    << endl
 308                    << "To load files with 'import Qt 4.7' with QML 2, specify:" << endl
 309                    << "  QMLSCENE_IMPORT_NAME=qt" << endl
 310                    << "on as an environment variable prior to launching the application." << endl;
 311         delete obj;
 312         root = 0;
 313     }
 314     if (root) {
 315         initialSize = rootObjectSize();
 316         if ((resizeMode == QQuickView::SizeViewToRootObject || !q->width() || !q->height())
 317                 && initialSize != q->size()) {
 318             q->resize(initialSize);
 319         }
 320         initResize();
 321     }
 322 }
 323
 324 /*!
 325   \internal
 326   If the \l {QTimerEvent} {timer event} \a e is this
 327   view's resize timer, sceneResized() is emitted.
 328  */
 329 void QQuickView::timerEvent(QTimerEvent* e)
 330 {
 331     Q_D(QQuickView);
 332     if (!e || e->timerId() == d->resizetimer.timerId()) {
 333         d->updateSize();
 334         d->resizetimer.stop();
 335     }
 336 }
 337
 338 /*!
 339     \internal
 340     Preferred size follows the root object geometry.
 341 */
 342 QSize QQuickView::sizeHint() const
 343 {
 344     Q_D(const QQuickView);
 345     QSize rootObjectSize = d->rootObjectSize();
 346     if (rootObjectSize.isEmpty()) {
 347         return size();
 348     } else {
 349         return rootObjectSize;
 350     }
 351 }
 352
 353 QSize QQuickView::initialSize() const
 354 {
 355     Q_D(const QQuickView);
 356     return d->initialSize;
 357 }
 358
 359 QQuickItem *QQuickView::rootObject() const
 360 {
 361     Q_D(const QQuickView);
 362     return d->root;
 363 }
 364
 365 /*!
 366   \internal
 367   This function handles the \l {QResizeEvent} {resize event}
 368   \a e.
 369  */
 370 void QQuickView::resizeEvent(QResizeEvent *e)
 371 {
 372     Q_D(QQuickView);
 373     if (d->resizeMode == SizeRootObjectToView)
 374         d->updateSize();
 375
 376     QQuickCanvas::resizeEvent(e);
 377 }
 378
 379 void QQuickView::keyPressEvent(QKeyEvent *e)
 380 {
 381     QDeclarativeDebugTrace::addEvent(QDeclarativeDebugTrace::Key);
 382
 383     QQuickCanvas::keyPressEvent(e);
 384 }
 385
 386 void QQuickView::keyReleaseEvent(QKeyEvent *e)
 387 {
 388     QDeclarativeDebugTrace::addEvent(QDeclarativeDebugTrace::Key);
 389
 390     QQuickCanvas::keyReleaseEvent(e);
 391 }
 392
 393 void QQuickView::mouseMoveEvent(QMouseEvent *e)
 394 {
 395     QDeclarativeDebugTrace::addEvent(QDeclarativeDebugTrace::Mouse);
 396
 397     QQuickCanvas::mouseMoveEvent(e);
 398 }
 399
 400 void QQuickView::mousePressEvent(QMouseEvent *e)
 401 {
 402     QDeclarativeDebugTrace::addEvent(QDeclarativeDebugTrace::Mouse);
 403
 404     QQuickCanvas::mousePressEvent(e);
 405 }
 406
 407 void QQuickView::mouseReleaseEvent(QMouseEvent *e)
 408 {
 409     QDeclarativeDebugTrace::addEvent(QDeclarativeDebugTrace::Mouse);
 410
 411     QQuickCanvas::mouseReleaseEvent(e);
 412 }
 413
 414
 415 QT_END_NAMESPACE