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Diffstat (limited to 'src/plugins/qmltooling/declarativeobserver/editor/boundingrecthighlighter.cpp')
| -rw-r--r-- | src/plugins/qmltooling/declarativeobserver/editor/boundingrecthighlighter.cpp | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/src/plugins/qmltooling/declarativeobserver/editor/boundingrecthighlighter.cpp b/src/plugins/qmltooling/declarativeobserver/editor/boundingrecthighlighter.cpp new file mode 100644 index 0000000..068f6de --- /dev/null +++ b/src/plugins/qmltooling/declarativeobserver/editor/boundingrecthighlighter.cpp @@ -0,0 +1,284 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "boundingrecthighlighter_p.h" + +#include "../qdeclarativeviewobserver_p.h" +#include "../qmlobserverconstants_p.h" + +#include <QtGui/QGraphicsPolygonItem> + +#include <QtCore/QTimer> +#include <QtCore/QObject> +#include <QtCore/QDebug> + +QT_BEGIN_NAMESPACE + +const qreal AnimDelta = 0.025f; +const int AnimInterval = 30; +const int AnimFrames = 10; + +BoundingBox::BoundingBox(QGraphicsObject *itemToHighlight, QGraphicsItem *parentItem, + QObject *parent) + : QObject(parent), + highlightedObject(itemToHighlight), + highlightPolygon(0), + highlightPolygonEdge(0) +{ + highlightPolygon = new BoundingBoxPolygonItem(parentItem); + highlightPolygonEdge = new BoundingBoxPolygonItem(parentItem); + + highlightPolygon->setPen(QPen(QColor(0, 22, 159))); + highlightPolygonEdge->setPen(QPen(QColor(158, 199, 255))); + + highlightPolygon->setFlag(QGraphicsItem::ItemIsSelectable, false); + highlightPolygonEdge->setFlag(QGraphicsItem::ItemIsSelectable, false); +} + +BoundingBox::~BoundingBox() +{ + highlightedObject.clear(); +} + +BoundingBoxPolygonItem::BoundingBoxPolygonItem(QGraphicsItem *item) : QGraphicsPolygonItem(item) +{ + QPen pen; + pen.setColor(QColor(108, 141, 221)); + pen.setWidth(1); + setPen(pen); +} + +int BoundingBoxPolygonItem::type() const +{ + return Constants::EditorItemType; +} + +BoundingRectHighlighter::BoundingRectHighlighter(QDeclarativeViewObserver *view) : + LiveLayerItem(view->declarativeView()->scene()), + m_view(view), + m_animFrame(0) +{ + m_animTimer = new QTimer(this); + m_animTimer->setInterval(AnimInterval); + connect(m_animTimer, SIGNAL(timeout()), SLOT(animTimeout())); +} + +BoundingRectHighlighter::~BoundingRectHighlighter() +{ + +} + +void BoundingRectHighlighter::animTimeout() +{ + ++m_animFrame; + if (m_animFrame == AnimFrames) { + m_animTimer->stop(); + } + + qreal alpha = m_animFrame / float(AnimFrames); + + foreach (BoundingBox *box, m_boxes) { + box->highlightPolygonEdge->setOpacity(alpha); + } +} + +void BoundingRectHighlighter::clear() +{ + if (m_boxes.length()) { + m_animTimer->stop(); + + foreach (BoundingBox *box, m_boxes) { + freeBoundingBox(box); + } + } +} + +BoundingBox *BoundingRectHighlighter::boxFor(QGraphicsObject *item) const +{ + foreach (BoundingBox *box, m_boxes) { + if (box->highlightedObject.data() == item) { + return box; + } + } + return 0; +} + +void BoundingRectHighlighter::highlight(QList<QGraphicsObject*> items) +{ + if (items.isEmpty()) + return; + + bool animate = false; + + QList<BoundingBox *> newBoxes; + foreach (QGraphicsObject *itemToHighlight, items) { + BoundingBox *box = boxFor(itemToHighlight); + if (!box) { + box = createBoundingBox(itemToHighlight); + animate = true; + } + + newBoxes << box; + } + qSort(newBoxes); + + if (newBoxes != m_boxes) { + clear(); + m_boxes << newBoxes; + } + + highlightAll(animate); +} + +void BoundingRectHighlighter::highlight(QGraphicsObject* itemToHighlight) +{ + if (!itemToHighlight) + return; + + bool animate = false; + + BoundingBox *box = boxFor(itemToHighlight); + if (!box) { + box = createBoundingBox(itemToHighlight); + m_boxes << box; + animate = true; + qSort(m_boxes); + } + + highlightAll(animate); +} + +BoundingBox *BoundingRectHighlighter::createBoundingBox(QGraphicsObject *itemToHighlight) +{ + if (!m_freeBoxes.isEmpty()) { + BoundingBox *box = m_freeBoxes.last(); + if (box->highlightedObject.isNull()) { + box->highlightedObject = itemToHighlight; + box->highlightPolygon->show(); + box->highlightPolygonEdge->show(); + m_freeBoxes.removeLast(); + return box; + } + } + + BoundingBox *box = new BoundingBox(itemToHighlight, this, this); + + connect(itemToHighlight, SIGNAL(xChanged()), this, SLOT(refresh())); + connect(itemToHighlight, SIGNAL(yChanged()), this, SLOT(refresh())); + connect(itemToHighlight, SIGNAL(widthChanged()), this, SLOT(refresh())); + connect(itemToHighlight, SIGNAL(heightChanged()), this, SLOT(refresh())); + connect(itemToHighlight, SIGNAL(rotationChanged()), this, SLOT(refresh())); + connect(itemToHighlight, SIGNAL(destroyed(QObject*)), this, SLOT(itemDestroyed(QObject*))); + + return box; +} + +void BoundingRectHighlighter::removeBoundingBox(BoundingBox *box) +{ + delete box; + box = 0; +} + +void BoundingRectHighlighter::freeBoundingBox(BoundingBox *box) +{ + if (!box->highlightedObject.isNull()) { + disconnect(box->highlightedObject.data(), SIGNAL(xChanged()), this, SLOT(refresh())); + disconnect(box->highlightedObject.data(), SIGNAL(yChanged()), this, SLOT(refresh())); + disconnect(box->highlightedObject.data(), SIGNAL(widthChanged()), this, SLOT(refresh())); + disconnect(box->highlightedObject.data(), SIGNAL(heightChanged()), this, SLOT(refresh())); + disconnect(box->highlightedObject.data(), SIGNAL(rotationChanged()), this, SLOT(refresh())); + } + + box->highlightedObject.clear(); + box->highlightPolygon->hide(); + box->highlightPolygonEdge->hide(); + m_boxes.removeOne(box); + m_freeBoxes << box; +} + +void BoundingRectHighlighter::itemDestroyed(QObject *obj) +{ + foreach (BoundingBox *box, m_boxes) { + if (box->highlightedObject.data() == obj) { + freeBoundingBox(box); + break; + } + } +} + +void BoundingRectHighlighter::highlightAll(bool animate) +{ + foreach (BoundingBox *box, m_boxes) { + if (box && box->highlightedObject.isNull()) { + // clear all highlights + clear(); + return; + } + QGraphicsObject *item = box->highlightedObject.data(); + QRectF itemAndChildRect = item->boundingRect() | item->childrenBoundingRect(); + + QPolygonF boundingRectInSceneSpace(item->mapToScene(itemAndChildRect)); + QPolygonF boundingRectInLayerItemSpace = mapFromScene(boundingRectInSceneSpace); + QRectF bboxRect + = m_view->adjustToScreenBoundaries(boundingRectInLayerItemSpace.boundingRect()); + QRectF edgeRect = bboxRect; + edgeRect.adjust(-1, -1, 1, 1); + + box->highlightPolygon->setPolygon(QPolygonF(bboxRect)); + box->highlightPolygonEdge->setPolygon(QPolygonF(edgeRect)); + + if (animate) + box->highlightPolygonEdge->setOpacity(0); + } + + if (animate) { + m_animFrame = 0; + m_animTimer->start(); + } +} + +void BoundingRectHighlighter::refresh() +{ + if (!m_boxes.isEmpty()) + highlightAll(true); +} + +QT_END_NAMESPACE |