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     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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    16 ** GNU Lesser General Public License Usage

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include "customproxy.h"

    43 

    44 #include <QtGui>

    45 

    46 CustomProxy::CustomProxy(QGraphicsItem *parent, Qt::WindowFlags wFlags)

    47     : QGraphicsProxyWidget(parent, wFlags), popupShown(false), currentPopup(0)

    48 {

    49     timeLine = new QTimeLine(250, this);

    50     connect(timeLine, SIGNAL(valueChanged(qreal)),

    51             this, SLOT(updateStep(qreal)));

    52     connect(timeLine, SIGNAL(stateChanged(QTimeLine::State)),

    53             this, SLOT(stateChanged(QTimeLine::State)));

    54 }

    55 

    56 QRectF CustomProxy::boundingRect() const

    57 {

    58     return QGraphicsProxyWidget::boundingRect().adjusted(0, 0, 10, 10);

    59 }

    60 

    61 void CustomProxy::paintWindowFrame(QPainter *painter, const QStyleOptionGraphicsItem *option,

    62                                    QWidget *widget)

    63 {

    64     const QColor color(0, 0, 0, 64);

    65    

    66     QRectF r = windowFrameRect();

    67     QRectF right(r.right(), r.top() + 10, 10, r.height() - 10);

    68     QRectF bottom(r.left() + 10, r.bottom(), r.width(), 10);

    69     bool intersectsRight = right.intersects(option->exposedRect);

    70     bool intersectsBottom = bottom.intersects(option->exposedRect);

    71     if (intersectsRight && intersectsBottom) {

    72         QPainterPath path;

    73         path.addRect(right);

    74         path.addRect(bottom);

    75         painter->setPen(Qt::NoPen);

    76         painter->setBrush(color);

    77         painter->drawPath(path);

    78     } else if (intersectsBottom) {

    79         painter->fillRect(bottom, color);

    80     } else if (intersectsRight) {

    81         painter->fillRect(right, color);

    82     }

    83 

    84     QGraphicsProxyWidget::paintWindowFrame(painter, option, widget);

    85 }

    86 

    87 void CustomProxy::hoverEnterEvent(QGraphicsSceneHoverEvent *event)

    88 {

    89     QGraphicsProxyWidget::hoverEnterEvent(event);

    90     scene()->setActiveWindow(this);

    91     if (timeLine->currentValue() != 1)

    92         zoomIn();

    93 }

    94 

    95 void CustomProxy::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)

    96 {

    97     QGraphicsProxyWidget::hoverLeaveEvent(event);

    98     if (!popupShown && (timeLine->direction() != QTimeLine::Backward || timeLine->currentValue() != 0))

    99         zoomOut();

   100 }

   101 

   102 bool CustomProxy::sceneEventFilter(QGraphicsItem *watched, QEvent *event)

   103 {

   104     if (watched->isWindow() && (event->type() == QEvent::UngrabMouse || event->type() == QEvent::GrabMouse)) {

   105         popupShown = watched->isVisible();

   106         if (!popupShown && !isUnderMouse())

   107             zoomOut();

   108     }

   109     return QGraphicsProxyWidget::sceneEventFilter(watched, event);

   110 }

   111 

   112 QVariant CustomProxy::itemChange(GraphicsItemChange change, const QVariant &value)

   113 {

   114     if (change == ItemChildAddedChange || change == ItemChildRemovedChange) {

   115         if (change == ItemChildAddedChange) {

   116             currentPopup = qVariantValue<QGraphicsItem *>(value);

   117             currentPopup->setCacheMode(ItemCoordinateCache);

   118             if (scene())

   119                 currentPopup->installSceneEventFilter(this);

   120         } else if (scene()) {

   121             currentPopup->removeSceneEventFilter(this);

   122             currentPopup = 0;

   123         }

   124     } else if (currentPopup && change == ItemSceneHasChanged) {

   125         currentPopup->installSceneEventFilter(this);

   126     }

   127     return QGraphicsProxyWidget::itemChange(change, value);

   128 }

   129 

   130 void CustomProxy::updateStep(qreal step)

   131 {

   132     QRectF r = boundingRect();

   133     setTransform(QTransform()

   134                  .translate(r.width() / 2, r.height() / 2)

   135                  .rotate(step * 30, Qt::XAxis)

   136                  .rotate(step * 10, Qt::YAxis)

   137                  .rotate(step * 5, Qt::ZAxis)

   138                  .scale(1 + 1.5 * step, 1 + 1.5 * step)

   139                  .translate(-r.width() / 2, -r.height() / 2));

   140 }

   141 

   142 void CustomProxy::stateChanged(QTimeLine::State state)

   143 {

   144     if (state == QTimeLine::Running) {

   145 	if (timeLine->direction() == QTimeLine::Forward)

   146             setCacheMode(ItemCoordinateCache);

   147     } else if (state == QTimeLine::NotRunning) {

   148 	if (timeLine->direction() == QTimeLine::Backward)

   149             setCacheMode(DeviceCoordinateCache);

   150     }

   151 }

   152 

   153 void CustomProxy::zoomIn()

   154 {

   155     if (timeLine->direction() != QTimeLine::Forward)

   156         timeLine->setDirection(QTimeLine::Forward);

   157     if (timeLine->state() == QTimeLine::NotRunning) 

   158         timeLine->start();

   159 }

   160 

   161 void CustomProxy::zoomOut()

   162 {

   163     if (timeLine->direction() != QTimeLine::Backward)

   164         timeLine->setDirection(QTimeLine::Backward);

   165     if (timeLine->state() == QTimeLine::NotRunning) 

   166         timeLine->start();

   167 }