plasma-framework/widgets/radiobutton.cpp

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/*
* Copyright 2007 by Rafael Fernández López <ereslibre@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License version 2 as
* published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
// Header Includes
#include "radiobutton.h"
// Qt includes
#include <QtGui/QWidget>
#include <QtGui/QApplication>
#include <QtGui/QGraphicsScene>
#include <QtGui/QStyleOptionButton>
#include <QtGui/QGraphicsSceneMouseEvent>
namespace Plasma
{
/// Private section ==============================
class RadioButton::Private
{
public:
Private();
~Private();
// Attributes
bool checked;
bool mouseOver;
bool mouseDown;
QString text;
};
RadioButton::Private::Private()
: checked(false)
, mouseOver(false)
, mouseDown(false)
, text(QString())
{
}
RadioButton::Private::~Private()
{
}
/// End Private section ==========================
RadioButton::RadioButton(QGraphicsItem *parent)
: Plasma::Widget(parent),
d(new Private)
{
setAcceptedMouseButtons(Qt::LeftButton);
setAcceptsHoverEvents(true);
}
RadioButton::~RadioButton()
{
delete d;
}
QRectF RadioButton::boundingRect() const
{
return QRectF(0, 0, 150, 30); // FIXME: this is obviously wrong
}
void RadioButton::paintWidget(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
QStyle *style = widget ? widget->style() : QApplication::style();
QStyleOptionButton radioButtonOption;
radioButtonOption.rect = option->rect;
radioButtonOption.text = d->text;
radioButtonOption.state = option->state;
radioButtonOption.state |= d->checked ? QStyle::State_On : QStyle::State_Off;
radioButtonOption.state |= d->mouseOver ? QStyle::State_MouseOver : QStyle::State_None;
radioButtonOption.state |= d->mouseDown ? QStyle::State_Sunken : QStyle::State_Raised;
style->drawControl(QStyle::CE_RadioButton, &radioButtonOption, painter, widget);
}
bool RadioButton::isChecked() const
{
return d->checked;
}
const QString &RadioButton::text() const
{
return d->text;
}
void RadioButton::setChecked(bool checked)
{
RadioButton *siblingRadioButton;
// If we have a parent item (some kind of grouping widget or whatever)
// check first there
if (d->mouseOver && checked && parentItem())
{
foreach(QGraphicsItem *sibling, parentItem()->children())
{
siblingRadioButton = dynamic_cast<RadioButton*>(sibling);
if (siblingRadioButton && siblingRadioButton->isChecked())
{
siblingRadioButton->setChecked(false);
break; // Only an item is checked at same time as maximum
}
}
}
// If not, we should be on a scene, not flying anywhere
else if (checked && !parentItem() && scene())
{
foreach(QGraphicsItem *sibling, scene()->items())
{
siblingRadioButton = dynamic_cast<RadioButton*>(sibling);
if (siblingRadioButton && siblingRadioButton->isChecked() && !siblingRadioButton->parentItem())
{
siblingRadioButton->setChecked(false);
break; // Only an item is checked at same time as maximum
}
}
}
d->checked = checked;
update();
}
void RadioButton::setText(const QString &text)
{
d->text = text;
update();
}
void RadioButton::updated(const QString&, const Plasma::DataEngine::Data &data)
{
Q_UNUSED(data);
}
void RadioButton::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
event->accept();
d->mouseDown = true;
update();
}
void RadioButton::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
event->accept();
d->mouseDown = false;
setChecked(true);
update();
emit clicked();
}
void RadioButton::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
event->accept();
d->mouseOver = true;
update();
}
void RadioButton::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
{
event->accept();
d->mouseOver = true;
update();
}
void RadioButton::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
event->accept();
d->mouseOver = false;
update();
}
void RadioButton::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
event->accept();
d->mouseOver = true;
update();
}
} // Plasma namespace
#include "radiobutton.moc"