plasma-framework/widgets/widget.cpp

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/*
* Copyright (C) 2007 by Alexander Wiedenbruch <mail@wiedenbruch.de>
* and Matias Valdenegro <mvaldenegro@informatica.utem.cl>
*
* 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.
*/
#include "widget.h"
#include <KDebug>
#include <QtCore/QList>
#include "layout.h"
namespace Plasma
{
class Widget::Private
{
public:
Private()
: parent(0),
layout(0)
{ }
~Private() { }
QSizeF size;
Widget *parent;
Layout *layout;
QList<Widget *> childList;
};
Widget::Widget(QGraphicsItem *parent)
: QGraphicsItem(parent),
d(new Private)
{
d->parent = dynamic_cast<Widget *>(parent);
if (d->parent) {
d->parent->addChild(this);
d->parent->invalidate();
}
}
Widget::~Widget()
{
delete d;
}
Qt::Orientations Widget::expandingDirections() const
{
return 0;
}
QSizeF Widget::maximumSize() const
{
return QSizeF();
}
QSizeF Widget::minimumSize() const
{
return QSizeF(0.0, 0.0);
}
bool Widget::hasHeightForWidth() const
{
return false;
}
qreal Widget::heightForWidth(qreal w) const
{
Q_UNUSED(w);
return -1.0;
}
bool Widget::hasWidthForHeight() const
{
return false;
}
qreal Widget::widthForHeight(qreal h) const
{
Q_UNUSED(h);
return -1.0;
}
QRectF Widget::geometry() const
{
return QRectF(pos(), size());
}
QRectF Widget::localGeometry() const
{
return QRectF(QPointF(0.0f, 0.0f), size());
}
void Widget::setGeometry(const QRectF& geometry)
{
prepareGeometryChange();
setPos(geometry.topLeft());
d->size = geometry.size();
updateGeometry();
update();
}
void Widget::updateGeometry()
{
if (layout()) {
kDebug() << (void *) this << " updating geometry to " << size() << endl;
layout()->setGeometry(geometry());
}
}
void Widget::invalidate()
{
setGeometry(geometry());
updateGeometry();
if (parent()) {
parent()->updateGeometry();
}
}
QSizeF Widget::sizeHint() const
{
return size();
}
QSizeF Widget::size() const
{
return d->size;
}
QRectF Widget::boundingRect() const
{
return QRectF(QPointF(0.0f, 0.0f), size());
}
void Widget::resize(const QSizeF& size)
{
setGeometry(QRectF(pos(), size));
}
void Widget::resize(qreal w, qreal h)
{
resize(QSizeF(w, h));
}
void Widget::setLayout(Layout *l)
{
if(!d->layout) {
d->layout = l;
} else {
kDebug() << "Widget " << this << "already has a layout!" << endl;
}
}
Layout *Widget::layout() const
{
return d->layout;
}
Widget *Widget::parent() const
{
return d->parent;
}
void Widget::addChild(Widget *w)
{
if (!w) {
return;
}
w->reparent(this);
d->childList.append(w);
qDebug("Added Child Widget : %p", (void*)w);
if (layout()) {
layout()->addItem(w);
updateGeometry();
}
}
void Widget::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(painter);
Q_UNUSED(option);
Q_UNUSED(widget);
// do nothing, but we need to reimp so we can create Widget items as this method
// is pure virtual in QGraphicsItem
}
void Widget::reparent(Widget *w)
{
d->parent = w;
setParentItem(w);
update();
}
} // Plasma namespace