plasma-framework/widgets/layout.cpp

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/*
* Copyright 2007 by Matias Valdenegro T. <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 "layout.h"
#include <math.h>
#include <QtCore/QList>
#include <QtCore/QTimeLine>
#include <QtDebug>
#include "widget.h"
#include "layoutanimator.h"
namespace Plasma
{
class Layout::Private
{
public:
Private(LayoutItem* parent)
: margin(12.0),
spacing(6.0),
parent(parent),
animator(0)
{
}
~Private() {}
qreal margin;
qreal spacing;
LayoutItem *parent;
LayoutAnimator *animator;
};
Layout::Layout(LayoutItem *parent)
: LayoutItem(),
d(new Private(parent))
{
}
void Layout::setParent(LayoutItem *parent) {
d->parent = parent;
}
Layout::~Layout()
{
if (parent()) {
parent()->setLayout(0);
}
delete d;
}
bool Layout::isEmpty() const
{
return count() == 0;
}
void Layout::update()
{
setGeometry(geometry());
}
void Layout::invalidate()
{
//qDebug() << "Layout update";
LayoutItem *item = parent();
while ( item ) {
//qDebug() << "Looking at item " << item;
Widget *widget = dynamic_cast<Widget*>(item);
if ( widget ) {
//qDebug() << "Parent widget found and invalidated";
widget->updateGeometry();
break;
}
else {
Layout *layout = dynamic_cast<Layout*>(item);
if ( layout ) {
item = layout->parent();
// qDebug() << "Item is a layout";
}
else
item = 0;
}
}
}
LayoutAnimator* Layout::animator() const
{
return d->animator;
}
void Layout::setAnimator(LayoutAnimator* animator)
{
d->animator = animator;
}
qreal Layout::margin() const
{
return d->margin;
}
void Layout::setMargin(qreal m)
{
d->margin = m;
}
qreal Layout::spacing() const
{
return d->spacing;
}
void Layout::setSpacing(qreal s)
{
d->spacing = s;
}
LayoutItem *Layout::parent() const
{
return d->parent;
}
QSizeF Layout::minimumSize() const
{
return QSizeF(0,0);
}
QSizeF Layout::maximumSize() const
{
return QSizeF(INFINITY,INFINITY);
}
void Layout::startAnimation()
{
if ( animator() && animator()->timeLine() ) {
animator()->timeLine()->setCurrentTime(0);
if ( animator()->timeLine()->state() == QTimeLine::NotRunning ) {
animator()->timeLine()->start();
}
}
}
}