1 files changed, 164 insertions, 0 deletions
diff --git a/examples/graphicsview/padnavigator/roundrectitem.cpp b/examples/graphicsview/padnavigator/roundrectitem.cpp
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+++ b/examples/graphicsview/padnavigator/roundrectitem.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "roundrectitem.h"
+
+#include <QtGui/QtGui>
+
+RoundRectItem::RoundRectItem(const QRectF &rect, const QBrush &brush, QWidget *embeddedWidget)
+    : QGraphicsRectItem(rect),
+      brush(brush),
+      timeLine(75),
+      lastVal(0),
+      opa(1),
+      proxyWidget(0)
+{
+    connect(&timeLine, SIGNAL(valueChanged(qreal)),
+            this, SLOT(updateValue(qreal)));
+    
+    if (embeddedWidget) {
+        proxyWidget = new QGraphicsProxyWidget(this);
+        proxyWidget->setFocusPolicy(Qt::StrongFocus);
+        proxyWidget->setWidget(embeddedWidget);
+        proxyWidget->setGeometry(boundingRect().adjusted(25, 25, -25, -25));
+    }
+}
+
+void RoundRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
+{
+    QTransform x = painter->worldTransform();
+
+    QLineF unit = x.map(QLineF(0, 0, 1, 1));
+    if (unit.p1().x() > unit.p2().x() || unit.p1().y() > unit.p2().y()) {
+        if (proxyWidget && proxyWidget->isVisible()) {
+            proxyWidget->hide();
+            proxyWidget->setGeometry(rect());
+        }
+        return;
+    }
+
+    if (proxyWidget && !proxyWidget->isVisible()) {
+        proxyWidget->show();
+        proxyWidget->setFocus();
+    }
+    if (proxyWidget && proxyWidget->pos() != QPoint())
+        proxyWidget->setGeometry(boundingRect().adjusted(25, 25, -25, -25));
+
+    painter->setOpacity(opacity());
+    painter->setPen(Qt::NoPen);
+    painter->setBrush(QColor(0, 0, 0, 64));
+    painter->drawRoundRect(rect().translated(2, 2));
+
+    if (!proxyWidget) {
+        QLinearGradient gradient(rect().topLeft(), rect().bottomRight());
+        const QColor col = brush.color();
+        gradient.setColorAt(0, col);
+        gradient.setColorAt(1, col.dark(int(200 + lastVal * 50)));
+        painter->setBrush(gradient);
+    } else {
+        painter->setBrush(brush);
+    }
+
+    painter->setPen(QPen(Qt::black, 1));
+    painter->drawRoundRect(rect());
+    if (!pix.isNull()) {
+        painter->scale(1.95, 1.95);
+        painter->drawPixmap(-pix.width() / 2, -pix.height() / 2, pix);;
+    }
+}
+
+QRectF RoundRectItem::boundingRect() const
+{
+    qreal penW = 0.5;
+    qreal shadowW = 2.0;
+    return rect().adjusted(-penW, -penW, penW + shadowW, penW + shadowW);
+}
+
+void RoundRectItem::setPixmap(const QPixmap &pixmap)
+{
+    pix = pixmap;
+    if (scene() && isVisible())
+        update();
+}
+
+qreal RoundRectItem::opacity() const
+{
+    RoundRectItem *parent = parentItem() ? (RoundRectItem *)parentItem() : 0;
+    return opa + (parent ? parent->opacity() : 0);
+}
+
+void RoundRectItem::setOpacity(qreal opacity)
+{
+    opa = opacity;
+    update();
+}
+
+void RoundRectItem::keyPressEvent(QKeyEvent *event)
+{
+    if (event->isAutoRepeat() || event->key() != Qt::Key_Return
+        || (timeLine.state() == QTimeLine::Running && timeLine.direction() == QTimeLine::Forward)) {
+        QGraphicsRectItem::keyPressEvent(event);
+        return;
+    }
+
+    timeLine.stop();
+    timeLine.setDirection(QTimeLine::Forward);
+    timeLine.start();
+    emit activated();
+}
+
+void RoundRectItem::keyReleaseEvent(QKeyEvent *event)
+{
+    if (event->key() != Qt::Key_Return) {
+        QGraphicsRectItem::keyReleaseEvent(event);
+        return;
+    }
+    timeLine.stop();
+    timeLine.setDirection(QTimeLine::Backward);
+    timeLine.start();
+}
+
+void RoundRectItem::updateValue(qreal value)
+{
+    lastVal = value;
+    if (!proxyWidget)
+        setTransform(QTransform().scale(1 - value / 10.0, 1 - value / 10.0));
+}