plasma-framework/animations/stackedlayout.cpp

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/*
Copyright (C) 2009 Igor Trindade Oliveira <igor.oliveira@indt.org.br>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "stackedlayout.h"
#include <QGraphicsWidget>
#include <QDebug>
StackedLayout::StackedLayout(QGraphicsLayoutItem *parent)
: QObject(0),
QGraphicsLayout(parent),
m_currentWidgetIndex(-1)
{
}
StackedLayout::~StackedLayout()
{
}
void StackedLayout::setGeometry(const QRectF &rect)
{
QGraphicsLayout::setGeometry(rect);
const QRectF effectiveRect = geometry();
for(int i = 0; i < items.size(); i++) {
itemAt(i)->setGeometry(effectiveRect);
}
}
QSizeF StackedLayout::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_UNUSED(which);
Q_UNUSED(constraint);
qreal left, top, right, bottom;
getContentsMargins(&left, &top, &right, &bottom);
if (m_currentWidgetIndex <= 0 || !itemAt(m_currentWidgetIndex)) {
return QSizeF();
}
QSizeF currentWidgetSize = itemAt(m_currentWidgetIndex)->effectiveSizeHint(which, constraint);
return QSizeF( left + right + currentWidgetSize.width(), right + bottom + currentWidgetSize.height());
}
int StackedLayout::count() const
{
return items.count();
}
QGraphicsLayoutItem *StackedLayout::itemAt(int i) const
{
return items.at(i);
}
void StackedLayout::insertWidget(QGraphicsLayoutItem *item, int pos)
{
if(!pos && (m_currentWidgetIndex == -1)) {
m_currentWidgetIndex = 0;
} else {
item->graphicsItem()->hide();
}
items.insert(pos, item);
activate();
}
void StackedLayout::addWidget(QGraphicsLayoutItem *item)
{
insertWidget(item, items.size());
}
void StackedLayout::removeAt(int index)
{
items.removeAt(index);
}
void StackedLayout::setCurrentWidgetIndex(qint32 index)
{
QGraphicsItem *currentWidget = itemAt(m_currentWidgetIndex)->graphicsItem();
QGraphicsItem *hiddenWidget = itemAt(index)->graphicsItem();
currentWidget->hide();
hiddenWidget->show();
m_currentWidgetIndex = index;
}
qint32 StackedLayout::currentWidgetIndex() const
{
return m_currentWidgetIndex;
}