plasma-framework/layouts/borderlayout.cpp
Aaron J. Seigo 9335a50776 Ensure that LayoutItem::setParent resets the parents layout if we are currently its layout and release managed items.
RB:89

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=773471
2008-02-11 05:50:47 +00:00

248 lines
7.3 KiB
C++

/*
* Copyright (C) 2007 Ivan Cukic <ivan.cukic+kde@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library/Lesser General Public License
* version 2, or (at your option) any later version, 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/Lesser 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 "borderlayout.h"
namespace Plasma {
class BorderLayout::Private {
public:
BorderLayout * q;
explicit Private(BorderLayout * parent = 0)
: q(parent)
{
sizes[LeftPositioned] = -1;
sizes[RightPositioned] = -1;
sizes[TopPositioned] = -1;
sizes[BottomPositioned] = -1;
sizes[CenterPositioned] = -1;
}
virtual ~Private()
{
}
QMap< Position, LayoutItem * > itemPositions;
QMap< Position, qreal > sizes;
};
BorderLayout::BorderLayout(LayoutItem * parent) :
Layout(parent), d(new Private(this))
{
if (parent) {
parent->setLayout(this);
}
}
BorderLayout::~BorderLayout()
{
releaseManagedItems();
delete d;
}
Qt::Orientations BorderLayout::expandingDirections() const
{
return Qt::Horizontal | Qt::Vertical;
}
void BorderLayout::relayout()
{
QRectF rect = geometry();
rect.setTopLeft(rect.topLeft() + QPointF(margin(LeftMargin), margin(TopMargin)));
rect.setBottomRight(rect.bottomRight() - QPointF(margin(RightMargin), margin(BottomMargin)));
QPointF origin = rect.topLeft();
qreal top, bottom, left, right;
top = (d->sizes[TopPositioned] >= 0) ? d->sizes[TopPositioned] : 0;
left = (d->sizes[LeftPositioned] >= 0) ? d->sizes[LeftPositioned] : 0;
bottom = rect.height() - ((d->sizes[BottomPositioned] >= 0) ? d->sizes[BottomPositioned] : 0);
right = rect.width() - ((d->sizes[RightPositioned] >= 0) ? d->sizes[RightPositioned] : 0);
if (d->itemPositions[TopPositioned] /*&& d->itemPositions[TopPositioned]->isVisible()*/) {
top = (d->sizes[TopPositioned] >= 0) ? d->sizes[TopPositioned] : d->itemPositions[TopPositioned]->sizeHint().height();
d->itemPositions[TopPositioned]->setGeometry(QRectF(origin, QSizeF(
rect.width(), top)));
top += spacing();
}
if (d->itemPositions[BottomPositioned] /*&& d->itemPositions[BottomPositioned]->isVisible()*/) {
bottom = (d->sizes[BottomPositioned] >= 0) ? d->sizes[BottomPositioned]
: d->itemPositions[BottomPositioned]->sizeHint().height();
d->itemPositions[BottomPositioned]->setGeometry(QRectF(origin + QPointF(0,
rect.height() - bottom), QSizeF(rect.width(),
bottom)));
bottom = rect.height() - bottom - spacing();
}
if (d->itemPositions[LeftPositioned] /*&& d->itemPositions[LeftPositioned]->isVisible()*/) {
left = (d->sizes[LeftPositioned] >= 0) ? d->sizes[LeftPositioned] : d->itemPositions[LeftPositioned]->sizeHint().width();
d->itemPositions[LeftPositioned]->setGeometry(QRectF(origin + QPointF(0, top),
QSizeF(left, bottom - top)));
left += spacing();
}
if (d->itemPositions[RightPositioned] /*&& d->itemPositions[RightPositioned]->isVisible()*/) {
right = (d->sizes[RightPositioned] >= 0) ? d->sizes[RightPositioned] : d->itemPositions[RightPositioned]->sizeHint().width();
d->itemPositions[RightPositioned]->setGeometry(QRectF(origin + QPointF(
rect.width() - right, top), QSizeF(right, bottom - top)));
right = rect.width() - right - spacing();
}
if (d->itemPositions[CenterPositioned] /*&& d->itemPositions[CenterPositioned]->isVisible()*/) {
d->itemPositions[CenterPositioned]->setGeometry(QRectF(
origin + QPointF(left, top), QSizeF(right - left, bottom - top)));
}
}
void BorderLayout::releaseManagedItems()
{
foreach (Plasma::LayoutItem *item, d->itemPositions) {
item->unsetManagingLayout(this);
}
}
QSizeF BorderLayout::sizeHint() const
{
qreal hintHeight = 0.0;
qreal hintWidth = 0.0;
if (d->itemPositions[TopPositioned] /*&& d->itemPositions[TopPositioned]->isVisible()*/) {
hintHeight += d->itemPositions[TopPositioned]->sizeHint().height();
}
if (d->itemPositions[BottomPositioned] /*&& d->itemPositions[BottomPositioned]->isVisible()*/) {
hintHeight += d->itemPositions[BottomPositioned]->sizeHint().height();
}
if (d->itemPositions[LeftPositioned] /*&& d->itemPositions[LeftPositioned]->isVisible()*/) {
hintWidth += d->itemPositions[LeftPositioned]->sizeHint().width();
}
if (d->itemPositions[RightPositioned] /*&& d->itemPositions[RightPositioned]->isVisible()*/) {
hintWidth += d->itemPositions[RightPositioned]->sizeHint().width();
}
if (d->itemPositions[CenterPositioned] /*&& d->itemPositions[CenterPositioned]->isVisible()*/) {
hintHeight += d->itemPositions[CenterPositioned]->sizeHint().height();
hintWidth += d->itemPositions[CenterPositioned]->sizeHint().width();
}
return QSizeF(hintWidth + 2 + margin(LeftMargin) + margin(RightMargin), hintHeight + 2 + margin(TopMargin) + margin(BottomMargin));
}
void BorderLayout::addItem(Plasma::LayoutItem * item)
{
BorderLayout::addItem (item, CenterPositioned);
}
void BorderLayout::addItem(Plasma::LayoutItem * item, Position position)
{
removeItem(item);
d->itemPositions[position] = item;
item->setManagingLayout(this);
updateGeometry();
}
void BorderLayout::removeItem(LayoutItem * item)
{
QMutableMapIterator< Position, Plasma::LayoutItem * > i(d->itemPositions);
while (i.hasNext()) {
i.next();
if (i.value() == item) {
i.remove();
item->unsetManagingLayout(this);
}
}
updateGeometry();
}
int BorderLayout::count() const
{
int count = 0;
foreach (Plasma::LayoutItem * i, d->itemPositions) {
if (i) {
++count;
}
}
return count;
}
int BorderLayout::indexOf(LayoutItem * item) const
{
int count = 0;
foreach (Plasma::LayoutItem * i, d->itemPositions) {
if (i) {
if (item == i) {
return count;
}
++count;
}
}
return -1;
}
LayoutItem * BorderLayout::itemAt(int index) const
{
int count = 0;
foreach (Plasma::LayoutItem * i, d->itemPositions) {
if (i) {
if (index == count) {
return i;
}
count++;
}
}
return 0;
}
Plasma::LayoutItem * BorderLayout::takeAt(int i)
{
Plasma::LayoutItem * item = itemAt(i);
removeItem(item);
return item;
}
void BorderLayout::setSize(qreal size, Position border)
{
d->sizes[border] = size;
updateGeometry();
}
void BorderLayout::setAutoSize(Position border)
{
d->sizes[border] = -1;
updateGeometry();
}
qreal BorderLayout::size(Position border)
{
if (border == CenterPositioned) {
return -1;
}
return d->sizes[border];
}
}