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     2 **

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

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     7 ** This file is part of the examples of the Qt Toolkit.

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    16 ** GNU Lesser General Public License Usage

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

    41 

    42 #include "roundrectitem.h"

    43 

    44 #include <QtGui/QtGui>

    45 

    46 RoundRectItem::RoundRectItem(const QRectF &rect, const QBrush &brush, QWidget *embeddedWidget)

    47     : QGraphicsRectItem(rect),

    48       brush(brush),

    49       timeLine(75),

    50       lastVal(0),

    51       opa(1),

    52       proxyWidget(0)

    53 {

    54     connect(&timeLine, SIGNAL(valueChanged(qreal)),

    55             this, SLOT(updateValue(qreal)));

    56     

    57     if (embeddedWidget) {

    58         proxyWidget = new QGraphicsProxyWidget(this);

    59         proxyWidget->setFocusPolicy(Qt::StrongFocus);

    60         proxyWidget->setWidget(embeddedWidget);

    61         proxyWidget->setGeometry(boundingRect().adjusted(25, 25, -25, -25));

    62     }

    63 }

    64 

    65 void RoundRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)

    66 {

    67     QTransform x = painter->worldTransform();

    68 

    69     QLineF unit = x.map(QLineF(0, 0, 1, 1));

    70     if (unit.p1().x() > unit.p2().x() || unit.p1().y() > unit.p2().y()) {

    71         if (proxyWidget && proxyWidget->isVisible()) {

    72             proxyWidget->hide();

    73             proxyWidget->setGeometry(rect());

    74         }

    75         return;

    76     }

    77 

    78     if (proxyWidget && !proxyWidget->isVisible()) {

    79         proxyWidget->show();

    80         proxyWidget->setFocus();

    81     }

    82     if (proxyWidget && proxyWidget->pos() != QPoint())

    83         proxyWidget->setGeometry(boundingRect().adjusted(25, 25, -25, -25));

    84 

    85     painter->setOpacity(opacity());

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

    87     painter->setBrush(QColor(0, 0, 0, 64));

    88     painter->drawRoundRect(rect().translated(2, 2));

    89 

    90     if (!proxyWidget) {

    91         QLinearGradient gradient(rect().topLeft(), rect().bottomRight());

    92         const QColor col = brush.color();

    93         gradient.setColorAt(0, col);

    94         gradient.setColorAt(1, col.dark(int(200 + lastVal * 50)));

    95         painter->setBrush(gradient);

    96     } else {

    97         painter->setBrush(brush);

    98     }

    99 

   100     painter->setPen(QPen(Qt::black, 1));

   101     painter->drawRoundRect(rect());

   102     if (!pix.isNull()) {

   103         painter->scale(1.95, 1.95);

   104         painter->drawPixmap(-pix.width() / 2, -pix.height() / 2, pix);;

   105     }

   106 }

   107 

   108 QRectF RoundRectItem::boundingRect() const

   109 {

   110     qreal penW = 0.5;

   111     qreal shadowW = 2.0;

   112     return rect().adjusted(-penW, -penW, penW + shadowW, penW + shadowW);

   113 }

   114 

   115 void RoundRectItem::setPixmap(const QPixmap &pixmap)

   116 {

   117     pix = pixmap;

   118     if (scene() && isVisible())

   119         update();

   120 }

   121 

   122 qreal RoundRectItem::opacity() const

   123 {

   124     RoundRectItem *parent = parentItem() ? (RoundRectItem *)parentItem() : 0;

   125     return opa + (parent ? parent->opacity() : 0);

   126 }

   127 

   128 void RoundRectItem::setOpacity(qreal opacity)

   129 {

   130     opa = opacity;

   131     update();

   132 }

   133 

   134 void RoundRectItem::keyPressEvent(QKeyEvent *event)

   135 {

   136     if (event->isAutoRepeat() || event->key() != Qt::Key_Return

   137         || (timeLine.state() == QTimeLine::Running && timeLine.direction() == QTimeLine::Forward)) {

   138         QGraphicsRectItem::keyPressEvent(event);

   139         return;

   140     }

   141 

   142     timeLine.stop();

   143     timeLine.setDirection(QTimeLine::Forward);

   144     timeLine.start();

   145     emit activated();

   146 }

   147 

   148 void RoundRectItem::keyReleaseEvent(QKeyEvent *event)

   149 {

   150     if (event->key() != Qt::Key_Return) {

   151         QGraphicsRectItem::keyReleaseEvent(event);

   152         return;

   153     }

   154     timeLine.stop();

   155     timeLine.setDirection(QTimeLine::Backward);

   156     timeLine.start();

   157 }

   158 

   159 void RoundRectItem::updateValue(qreal value)

   160 {

   161     lastVal = value;

   162     if (!proxyWidget)

   163         setTransform(QTransform().scale(1 - value / 10.0, 1 - value / 10.0));

   164 }