[2] | 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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[561] | 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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[2] | 6 | **
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| 7 | ** This file is part of the examples of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in
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| 14 | ** a written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Lesser General Public License Usage
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 18 | ** General Public License version 2.1 as published by the Free Software
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 20 | ** packaging of this file. Please review the following information to
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 23 | **
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[561] | 24 | ** In addition, as a special exception, Nokia gives you certain additional
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| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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[2] | 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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[561] | 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at [email protected].
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[2] | 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | #include "roundrectitem.h"
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| 43 |
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| 44 | #include <QtGui/QtGui>
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| 45 |
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| 46 | RoundRectItem::RoundRectItem(const QRectF &rect, const QBrush &brush, QWidget *embeddedWidget)
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| 47 | : QGraphicsRectItem(rect),
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| 48 | brush(brush),
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| 49 | timeLine(75),
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| 50 | lastVal(0),
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| 51 | opa(1),
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| 52 | proxyWidget(0)
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| 53 | {
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| 54 | connect(&timeLine, SIGNAL(valueChanged(qreal)),
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| 55 | this, SLOT(updateValue(qreal)));
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| 56 |
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| 57 | if (embeddedWidget) {
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| 58 | proxyWidget = new QGraphicsProxyWidget(this);
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| 59 | proxyWidget->setFocusPolicy(Qt::StrongFocus);
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| 60 | proxyWidget->setWidget(embeddedWidget);
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| 61 | proxyWidget->setGeometry(boundingRect().adjusted(25, 25, -25, -25));
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| 62 | }
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| 63 | }
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| 64 |
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| 65 | void RoundRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
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| 66 | {
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| 67 | QTransform x = painter->worldTransform();
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| 68 |
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| 69 | QLineF unit = x.map(QLineF(0, 0, 1, 1));
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| 70 | if (unit.p1().x() > unit.p2().x() || unit.p1().y() > unit.p2().y()) {
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| 71 | if (proxyWidget && proxyWidget->isVisible()) {
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| 72 | proxyWidget->hide();
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| 73 | proxyWidget->setGeometry(rect());
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| 74 | }
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| 75 | return;
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| 76 | }
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| 77 |
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| 78 | if (proxyWidget && !proxyWidget->isVisible()) {
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| 79 | proxyWidget->show();
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| 80 | proxyWidget->setFocus();
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| 81 | }
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| 82 | if (proxyWidget && proxyWidget->pos() != QPoint())
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| 83 | proxyWidget->setGeometry(boundingRect().adjusted(25, 25, -25, -25));
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| 84 |
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| 85 | painter->setOpacity(opacity());
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| 86 | painter->setPen(Qt::NoPen);
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| 87 | painter->setBrush(QColor(0, 0, 0, 64));
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| 88 | painter->drawRoundRect(rect().translated(2, 2));
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| 89 |
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| 90 | if (!proxyWidget) {
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| 91 | QLinearGradient gradient(rect().topLeft(), rect().bottomRight());
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| 92 | const QColor col = brush.color();
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| 93 | gradient.setColorAt(0, col);
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| 94 | gradient.setColorAt(1, col.dark(int(200 + lastVal * 50)));
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| 95 | painter->setBrush(gradient);
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| 96 | } else {
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| 97 | painter->setBrush(brush);
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| 98 | }
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| 99 |
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| 100 | painter->setPen(QPen(Qt::black, 1));
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| 101 | painter->drawRoundRect(rect());
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| 102 | if (!pix.isNull()) {
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| 103 | painter->scale(1.95, 1.95);
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| 104 | painter->drawPixmap(-pix.width() / 2, -pix.height() / 2, pix);;
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| 105 | }
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| 106 | }
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| 107 |
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| 108 | QRectF RoundRectItem::boundingRect() const
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| 109 | {
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| 110 | qreal penW = 0.5;
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| 111 | qreal shadowW = 2.0;
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| 112 | return rect().adjusted(-penW, -penW, penW + shadowW, penW + shadowW);
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| 113 | }
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| 114 |
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| 115 | void RoundRectItem::setPixmap(const QPixmap &pixmap)
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| 116 | {
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| 117 | pix = pixmap;
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| 118 | if (scene() && isVisible())
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| 119 | update();
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| 120 | }
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| 121 |
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| 122 | qreal RoundRectItem::opacity() const
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| 123 | {
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| 124 | RoundRectItem *parent = parentItem() ? (RoundRectItem *)parentItem() : 0;
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| 125 | return opa + (parent ? parent->opacity() : 0);
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| 126 | }
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| 127 |
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| 128 | void RoundRectItem::setOpacity(qreal opacity)
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| 129 | {
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| 130 | opa = opacity;
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| 131 | update();
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| 132 | }
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| 133 |
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| 134 | void RoundRectItem::keyPressEvent(QKeyEvent *event)
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| 135 | {
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| 136 | if (event->isAutoRepeat() || event->key() != Qt::Key_Return
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| 137 | || (timeLine.state() == QTimeLine::Running && timeLine.direction() == QTimeLine::Forward)) {
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| 138 | QGraphicsRectItem::keyPressEvent(event);
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| 139 | return;
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| 140 | }
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| 141 |
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| 142 | timeLine.stop();
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| 143 | timeLine.setDirection(QTimeLine::Forward);
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| 144 | timeLine.start();
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| 145 | emit activated();
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| 146 | }
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| 147 |
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| 148 | void RoundRectItem::keyReleaseEvent(QKeyEvent *event)
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| 149 | {
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| 150 | if (event->key() != Qt::Key_Return) {
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| 151 | QGraphicsRectItem::keyReleaseEvent(event);
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| 152 | return;
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| 153 | }
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| 154 | timeLine.stop();
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| 155 | timeLine.setDirection(QTimeLine::Backward);
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| 156 | timeLine.start();
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| 157 | }
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| 158 |
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| 159 | void RoundRectItem::updateValue(qreal value)
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| 160 | {
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| 161 | lastVal = value;
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| 162 | if (!proxyWidget)
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| 163 | setTransform(QTransform().scale(1 - value / 10.0, 1 - value / 10.0));
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| 164 | }
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