210 lines
5.1 KiB
C++
210 lines
5.1 KiB
C++
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/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtGui>
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#include "button.h"
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#include "theme.h"
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static const int MinTextWidthAsChars = 8;
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class ButtonPrivate {
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Q_DECLARE_PUBLIC(Button)
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public:
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ButtonPrivate(Button *button)
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: down(false)
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, q_ptr(button)
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{
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textItem = new QGraphicsSimpleTextItem(q_ptr);
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}
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QGraphicsSimpleTextItem *textItem;
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bool down;
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Button *q_ptr;
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};
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Button::Button(const QString &text, QGraphicsItem *parent, QSizeF minimumSize)
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: QGraphicsWidget(parent)
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, d_ptr(new ButtonPrivate(this)), m_background(), m_selected(false)
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{
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Q_D(Button);
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setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed);
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//setCacheMode(QGraphicsItem::ItemCoordinateCache);
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if(minimumSize.isValid())
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setMinimumSize(minimumSize);
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setContentsMargins(0, 0, 0, 0);
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d->textItem->setText(text);
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prepareGeometryChange();
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m_font = Theme::p()->font(Theme::MenuItem);
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d->textItem->setFont(m_font);
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connect(Theme::p(), SIGNAL(themeChanged()), this, SLOT(themeChange()));
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}
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Button::~Button()
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{
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delete d_ptr;
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}
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bool Button::isDown()
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{
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Q_D(Button);
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return d->down;
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}
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void Button::setText(const QString &text)
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{
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Q_D(Button);
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d->textItem->setText(text);
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update();
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}
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QString Button::text()
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{
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Q_D(Button);
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return d->textItem->text();
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}
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void Button::paint(QPainter *painter,
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const QStyleOptionGraphicsItem *option,
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QWidget *widget)
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{
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Q_UNUSED(widget);
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Q_UNUSED(option);
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if(!m_background.isNull())
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painter->drawPixmap(QPoint(), m_background);
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if(m_selected) {
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painter->setBrush(Qt::black);
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painter->setOpacity(0.2);
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painter->drawRect(boundingRect().toRect());
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}
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}
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QSizeF Button::sizeHint(Qt::SizeHint which,
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const QSizeF &constraint) const
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{
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Q_D(const Button);
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switch (which)
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{
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case Qt::MinimumSize:
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{
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QFontMetricsF fm(d->textItem->font());
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return QSizeF(MinTextWidthAsChars * fm.maxWidth(), fm.height());
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}
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case Qt::PreferredSize:
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{
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QFontMetricsF fm(d->textItem->font());
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return QSizeF(fm.width(d->textItem->text()), fm.height());
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}
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default:
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return QGraphicsWidget::sizeHint(which, constraint);
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}
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}
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void Button::mousePressEvent(QGraphicsSceneMouseEvent *event)
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{
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Q_D(Button);
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if (event->button() != Qt::LeftButton ||
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!sceneBoundingRect().contains(event->scenePos()))
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return;
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d->down = true;
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prepareGeometryChange();
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emit pressed();
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}
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void Button::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
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{
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Q_D(Button);
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if (!d->down || event->button() != Qt::LeftButton)
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return;
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d->down = false;
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prepareGeometryChange();
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emit released();
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if (sceneBoundingRect().contains(event->scenePos()))
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emit clicked();
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}
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void Button::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
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{
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Q_UNUSED(event);
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}
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void Button::resizeEvent(QGraphicsSceneResizeEvent *event)
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{
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Q_D(Button);
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QGraphicsWidget::resizeEvent(event);
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QRectF rect = d->textItem->boundingRect();
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QRectF buttonrect = this->boundingRect();
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d->textItem->setPos((buttonrect.width() - rect.width())/2, (buttonrect.height() - rect.height())/2 );
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QSize currentSize = buttonrect.size().toSize();
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if( m_background.size() != currentSize && (currentSize.width() > 0 && currentSize.height() > 0) ) {
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m_background = Theme::p()->pixmap("status_field_middle.svg", buttonrect.size().toSize());
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}
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}
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void Button::setBackground(QPixmap& background)
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{
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m_background = background;
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}
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void Button::themeChange()
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{
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Q_D(Button);
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m_font = Theme::p()->font(Theme::MenuItem);
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d->textItem->setFont(m_font);
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}
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