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
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index 0000000..98dbc4f
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+++ b/src/plugins/qmltooling/declarativeobserver/editor/boundingrecthighlighter.cpp
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+/****************************************************************************
+**
+** 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 "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