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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: qt-info@nokia.com
**
** This software, including documentation, is protected by copyright
** controlled by Nokia Corporation. You may use this software in
** accordance with the terms and conditions contained in the Qt Phone
** Demo License Agreement.
**
****************************************************************************/
#include <QPixmap>
#include <QPainter>
#include <QStyleOptionGraphicsItem>
#include <QGraphicsSceneMouseEvent>
#include "button.h"
class ButtonPrivate
{
public:
ButtonPrivate(Button *qptr);
void init();
Button *q;
QString text;
bool isPressed;
QPixmap normalPixmap;
QPixmap pressedPixmap;
QPixmap disabledPixmap;
};
ButtonPrivate::ButtonPrivate(Button *qptr)
: q(qptr), isPressed(false)
{
}
void ButtonPrivate::init()
{
q->setMinimumSize(normalPixmap.size());
q->setMaximumSize(normalPixmap.size());
}
Button::Button(const QPixmap &normal, QGraphicsItem *parent)
: QGraphicsWidget(parent),
d(new ButtonPrivate(this))
{
d->normalPixmap = normal;
d->init();
}
Button::Button(const QPixmap &normal, const QPixmap &pressed,
QGraphicsItem *parent)
: QGraphicsWidget(parent),
d(new ButtonPrivate(this))
{
d->normalPixmap = normal;
d->pressedPixmap = pressed;
d->init();
}
Button::Button(const QPixmap &normal, const QPixmap &pressed,
const QPixmap &disabled, QGraphicsItem *parent)
: QGraphicsWidget(parent),
d(new ButtonPrivate(this))
{
d->normalPixmap = normal;
d->pressedPixmap = pressed;
d->disabledPixmap = disabled;
d->init();
}
Button::~Button()
{
delete d;
}
void Button::setPixmap(State state, const QPixmap &pixmap)
{
bool dirty = false;
if (state == NormalState) {
d->normalPixmap = pixmap;
dirty = (!d->isPressed && isEnabled());
setMinimumSize(d->normalPixmap.size());
setMaximumSize(d->normalPixmap.size());
} else if (state == PressedState) {
dirty = d->isPressed;
d->pressedPixmap = pixmap;
} else if (state == DisabledState) {
dirty = !isEnabled();
d->disabledPixmap = pixmap;
}
if (dirty)
update();
}
QString Button::text() const
{
return d->text;
}
void Button::setText(const QString &value)
{
if (d->text != value) {
d->text = value;
update();
}
}
void Button::mousePressEvent(QGraphicsSceneMouseEvent *e)
{
if (e->button() == Qt::LeftButton) {
d->isPressed = true;
update();
emit pressed();
}
}
void Button::mouseReleaseEvent(QGraphicsSceneMouseEvent *e)
{
if (e->button() == Qt::LeftButton) {
const bool isClick = d->isPressed;
d->isPressed = false;
update();
emit released();
if (isClick && contains(e->pos()))
emit clicked();
}
}
void Button::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
Q_UNUSED(widget);
if (!(option->state & QStyle::State_Enabled)) {
const bool support = !d->disabledPixmap.isNull();
painter->drawPixmap(0, 0, support ? d->disabledPixmap : d->normalPixmap);
} else if (d->isPressed && !d->pressedPixmap.isNull())
painter->drawPixmap(0, 0, d->pressedPixmap);
else if (!d->normalPixmap.isNull())
painter->drawPixmap(0, 0, d->normalPixmap);
if (!d->text.isEmpty()) {
const QRect &textRect = boundingRect().toRect();
QFontMetrics metrics(font());
const QString &elidedText = metrics.elidedText(d->text, Qt::ElideRight,
textRect.width());
painter->setFont(font());
painter->setPen(Qt::white);
painter->drawText(textRect, Qt::TextSingleLine | Qt::AlignCenter, elidedText);
}
}
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