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/***************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (directui@nokia.com)
**
** This file is part of libmeegotouch.
**
** If you have questions regarding the use of this file, please contact
** Nokia at directui@nokia.com.
**
** This library is free software; you can redistribute it and/or
** modify it under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation
** and appearing in the file LICENSE.LGPL included in the packaging
** of this file.
**
****************************************************************************/
#include "mlinearlayoutpolicy.h"
#include "mlinearlayoutpolicy_p.h"
#include "mlayout.h"
#include "mlayouthelper_p.h"
#include "mdebug.h"
#include <QtGui/QGraphicsItem>
#include <QtGui/QGraphicsLayoutItem>
#include <QtGui/QGraphicsLinearLayout>
MLinearLayoutPolicy::MLinearLayoutPolicy(MLayout *l, Qt::Orientation o) :
MAbstractLayoutPolicy(*(new MLinearLayoutPolicyPrivate(l, o)))
{ }
MLinearLayoutPolicy::~MLinearLayoutPolicy()
{ }
void MLinearLayoutPolicy::addItem(QGraphicsLayoutItem *item)
{
insertItem(-1, item);
}
void MLinearLayoutPolicy::addItem(QGraphicsLayoutItem *item, Qt::Alignment alignment)
{
insertItem(-1, item, alignment);
}
void MLinearLayoutPolicy::insertItem(int index, QGraphicsLayoutItem *item)
{
Q_D(MLinearLayoutPolicy);
if (!item) {
mWarning("MLinearLayoutPolicy") << Q_FUNC_INFO << "cannot insert null item";
return;
}
if (item == d->layout) {
mWarning("MLinearLayoutPolicy") << Q_FUNC_INFO << "cannot insert self";
return;
}
d->fixIndex(&index);
d->rowCount++;
ProxyItem *proxyItem = new ProxyItem(item);
d->engine->insertItem(index, proxyItem);
MAbstractLayoutPolicy::insertItem(index, item);
if( isActive() && d->notifyWidgetsOfLayoutPositionEnabled )
d->notifyAffectedWidgetsOfLayoutPosition(index, true);
}
void MLinearLayoutPolicy::insertItem(int index, QGraphicsLayoutItem *item, Qt::Alignment alignment)
{
insertItem(index, item);
setAlignment(item, alignment);
}
qreal MLinearLayoutPolicy::spacing() const
{
Q_D(const MLinearLayoutPolicy);
(void)style(); //Make sure the style is loaded
return d->engine->spacing();
}
void MLinearLayoutPolicy::setItemSpacing(int index, qreal spacing)
{
Q_D(MLinearLayoutPolicy);
if (itemSpacing(index) == spacing)
return;
d->engine->setItemSpacing(index, spacing);
invalidatePolicyAndLayout();
}
qreal MLinearLayoutPolicy::itemSpacing(int index) const
{
Q_D(const MLinearLayoutPolicy);
return d->engine->itemSpacing(index);
}
void MLinearLayoutPolicy::insertStretch(int index, int stretch)
{
Q_D(MLinearLayoutPolicy);
//FIXME This is going to screw everything up since we don't insert the item to the base class..
d->fixIndex(&index);
d->rowCount++;
d->engine->insertStretch(index, stretch);
invalidatePolicyAndLayout();
}
void MLinearLayoutPolicy::setStretchFactor(QGraphicsLayoutItem *item, int stretch)
{
Q_D(MLinearLayoutPolicy);
if (!item) {
mWarning("MLinearLayoutPolicy") << Q_FUNC_INFO << "cannot assign a stretch factor to a null item";
return;
}
QGraphicsLayoutItem *proxyItem = d->engine->itemAt(indexOf(item));
if (d->engine->stretchFactor(proxyItem) == stretch)
return;
d->engine->setStretchFactor(proxyItem, stretch);
invalidatePolicyAndLayout();
}
int MLinearLayoutPolicy::stretchFactor(QGraphicsLayoutItem *item) const
{
Q_D(const MLinearLayoutPolicy);
if (!item) {
mWarning("MLinearLayoutPolicy") << Q_FUNC_INFO << "cannot return a stretch factor for a null item";
return 0;
}
QGraphicsLayoutItem *proxyItem = d->engine->itemAt(indexOf(item));
return d->engine->stretchFactor(proxyItem);
}
void MLinearLayoutPolicy::setOrientation(Qt::Orientation orientation)
{
Q_D(MLinearLayoutPolicy);
if (orientation != d->engine->orientation()) {
d->engine->setOrientation(orientation);
if (orientation == Qt::Horizontal)
d->engine->setSpacing(horizontalSpacing());
else
d->engine->setSpacing(verticalSpacing());
invalidatePolicyAndLayout();
if( isActive() && d->notifyWidgetsOfLayoutPositionEnabled )
d->notifyAllWidgetsOfLayoutPosition();
}
}
Qt::Orientation MLinearLayoutPolicy::orientation() const
{
Q_D(const MLinearLayoutPolicy);
return d->engine->orientation();
}
void MLinearLayoutPolicy::removeAt(int index)
{
Q_D(MLinearLayoutPolicy);
if (index < 0 || index >= d->engine->count()) {
mWarning("MLinearLayoutPolicy") << Q_FUNC_INFO << "invalid index" << index;
return;
}
if( isActive() && d->notifyWidgetsOfLayoutPositionEnabled )
d->notifyAffectedWidgetsOfLayoutPosition(index, false);
QGraphicsLayoutItem *proxyItem = d->engine->itemAt(index);
d->rowCount--;
d->engine->removeAt(index);
delete proxyItem;
MAbstractLayoutPolicy::removeAt(index);
}
QSizeF MLinearLayoutPolicy::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_D(const MLinearLayoutPolicy);
d->engine->setMinimumSize(QSizeF(-1, -1));
d->engine->setMaximumSize(QSizeF(-1, -1));
const_cast<MLinearLayoutPolicyPrivate *>(d)->refreshEngine();
return d->engine->sizeHint(which, constraint);
}
void MLinearLayoutPolicy::setNotifyWidgetsOfLayoutPositionEnabled(bool enabled)
{
Q_D(MLinearLayoutPolicy);
if( enabled != d->notifyWidgetsOfLayoutPositionEnabled ) {
d->notifyWidgetsOfLayoutPositionEnabled = enabled;
if( isActive() )
d->notifyAllWidgetsOfLayoutPosition();
}
}
bool MLinearLayoutPolicy::isNotifyWidgetsOfLayoutPositionEnabled() const
{
Q_D(const MLinearLayoutPolicy);
return d->notifyWidgetsOfLayoutPositionEnabled;
}
void MLinearLayoutPolicy::relayout()
{
Q_D(MLinearLayoutPolicy);
d->engine->setMinimumSize(layout()->minimumSize());
d->engine->setMaximumSize(layout()->maximumSize());
d->refreshEngineAndWidget();
d->engine->activate();
if (!isActive())
return;
for (int i = d->engine->count() - 1; i >= 0; --i) {
const QGraphicsLayoutItem *item = d->engine->itemAt(i);
setItemGeometry(i, item->geometry());
}
}
void MLinearLayoutPolicy::invalidate()
{
Q_D(MLinearLayoutPolicy);
d->engine->setMinimumSize(QSizeF(-1, -1));
d->engine->setMaximumSize(QSizeF(-1, -1));
const_cast<MLinearLayoutPolicyPrivate *>(d)->refreshEngine();
MAbstractLayoutPolicy::invalidate();
}
void MLinearLayoutPolicy::setHorizontalSpacing(qreal spacing)
{
Q_D(MLinearLayoutPolicy);
MAbstractLayoutPolicy::setHorizontalSpacing(spacing);
if (orientation() == Qt::Horizontal)
d->engine->setSpacing(spacing);
}
void MLinearLayoutPolicy::setVerticalSpacing(qreal spacing)
{
Q_D(MLinearLayoutPolicy);
MAbstractLayoutPolicy::setVerticalSpacing(spacing);
if (orientation() == Qt::Vertical)
d->engine->setSpacing(spacing);
}
void MLinearLayoutPolicy::setSpacing(qreal spacing)
{
Q_D(MLinearLayoutPolicy);
MAbstractLayoutPolicy::setHorizontalSpacing(spacing);
MAbstractLayoutPolicy::setVerticalSpacing(spacing);
d->engine->setSpacing(spacing);
}
void MLinearLayoutPolicy::setAlignment(QGraphicsLayoutItem *item, Qt::Alignment alignment)
{
Q_D(MLinearLayoutPolicy);
QGraphicsLayoutItem *proxyItem = d->engine->itemAt(indexOf(item));
d->engine->setAlignment(proxyItem, alignment);
invalidatePolicyAndLayout();
}
Qt::Alignment MLinearLayoutPolicy::alignment(QGraphicsLayoutItem *item) const
{
Q_D(const MLinearLayoutPolicy);
QGraphicsLayoutItem *proxyItem = d->engine->itemAt(indexOf(item));
return d->engine->alignment(proxyItem);
}
void MLinearLayoutPolicy::activated()
{
Q_D(MLinearLayoutPolicy);
MAbstractLayoutPolicy::activated();
d->notifyAllWidgetsOfLayoutPosition();
}
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