plasma-framework/widgets/vboxlayout.cpp
Aaron J. Seigo 3c690fea84 * add API docu to the methods i added
* add a resetLayout() so layouts can release LayoutItems on deletion, avoiding dangling pointers and possible crashes

svn path=/trunk/KDE/kdebase/workspace/plasma/lib/; revision=668931
2007-05-28 05:52:05 +00:00

210 lines
4.2 KiB
C++

/*
* Copyright (C) 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 "vboxlayout.h"
#include <QtCore/QList>
#include <KDebug>
namespace Plasma
{
class VBoxLayout::Private
{
public:
Private() {}
~Private() {}
QRectF geometry;
QList<LayoutItem *> childList;
};
VBoxLayout::VBoxLayout(LayoutItem *parent)
: Layout(parent),
d(new Private)
{
}
VBoxLayout::~VBoxLayout()
{
foreach (LayoutItem *l, d->childList) {
l->resetLayout();
}
}
Qt::Orientations VBoxLayout::expandingDirections() const
{
return Qt::Vertical;
}
QSizeF VBoxLayout::minimumSize() const
{
return QSizeF();
}
QSizeF VBoxLayout::maximumSize() const
{
return QSizeF();
}
bool VBoxLayout::hasHeightForWidth() const
{
return true;
}
qreal VBoxLayout::heightForWidth(qreal w) const
{
return qreal();
}
QRectF VBoxLayout::geometry() const
{
return d->geometry;
}
void VBoxLayout::setGeometry(const QRectF& geometry)
{
if (!geometry.isValid() || geometry.isEmpty()) {
kDebug() << "Invalid Geometry!" << endl;
return;
}
qDebug("Geometry %p : %f, %f by %f, %f", this, geometry.x(), geometry.y(), geometry.width(), geometry.height());
QList<LayoutItem *> childs;
QList<LayoutItem *> expandingChilds;
QList<QSizeF> sizes;
QSizeF available = geometry.size() - QSizeF(2 * margin(), 2 * margin());
foreach (LayoutItem *l, d->childList) {
kDebug() << "testing layout item " << l << endl;
if (l->expandingDirections() & Qt::Vertical) {
expandingChilds += l;
} else {
childs += l;
}
}
foreach (LayoutItem *l, childs) {
QSizeF hint = l->sizeHint();
sizes.insert(indexOf(l), QSizeF(available.width(), hint.height()));
available -= QSizeF(0.0, hint.height() + spacing());
}
qreal expandHeight = (available.height() - ((expandingChilds.count() - 1) * spacing())) / expandingChilds.count();
foreach (LayoutItem *l, expandingChilds) {
sizes.insert(indexOf(l),QSizeF(available.width(), expandHeight));
}
QPointF start = geometry.topLeft();
start += QPointF(margin(), spacing());
for (int i = 0; i < sizes.size(); i++) {
LayoutItem *l = itemAt(i);
l->setGeometry(QRectF(start, sizes[i]));
start += QPointF(0.0, sizes[i].height() + spacing());
}
d->geometry = geometry;
}
QSizeF VBoxLayout::sizeHint() const
{
qreal hintHeight = 0.0;
qreal hintWidth = 0.0;
foreach(LayoutItem *l, d->childList) {
QSizeF hint = l->sizeHint();
hintWidth = qMax(hint.width(), hintWidth);
hintHeight += hint.height() + spacing();
}
return QSizeF(hintWidth, hintHeight);
}
int VBoxLayout::count() const
{
return d->childList.count();
}
bool VBoxLayout::isEmpty() const
{
return count() == 0;
}
void VBoxLayout::insertItem(int index, LayoutItem *l)
{
if (!l) {
return;
}
l->setLayout(this);
d->childList.insert(index, l);
setGeometry(geometry());
}
void VBoxLayout::addItem(LayoutItem *l)
{
if (!l) {
return;
}
l->setLayout(this);
d->childList.append(l);
qDebug("Added Child LayoutItem : %p", l);
setGeometry(geometry());
}
void VBoxLayout::removeItem(LayoutItem *l)
{
d->childList.removeAll(l);
}
int VBoxLayout::indexOf(LayoutItem *l) const
{
return d->childList.indexOf(l);
}
LayoutItem *VBoxLayout::itemAt(int i) const
{
return d->childList[i];
}
LayoutItem *VBoxLayout::takeAt(int i)
{
return d->childList.takeAt(i);
setGeometry(geometry());
}
QSizeF VBoxLayout::size() const
{
return geometry().size();
}
}