plasma-framework/layouts/layout.cpp
Aaron J. Seigo 65d405f264 more layouting love;
* widgets should let Widget handle sizing, geometry unless there are very good reasons for it
* don't relayout the parent layout if the parent layout is already relayouting, because that relayout will have called the child's relayout in the first place. get it? relayout!
* i can dance. we can dance. do the relayout dance.
* some style guide fixes

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=738957
2007-11-20 01:19:59 +00:00

235 lines
4.5 KiB
C++

/*
* 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 as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* 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 "widgets/widget.h"
#include "layouts/layoutanimator.h"
namespace Plasma
{
class Layout::Private
{
public:
Private(LayoutItem* p)
: leftMargin(12.0),
rightMargin(12.0),
topMargin(12.0),
bottomMargin(12.0),
spacing(6.0),
parent(p),
animator(0),
relayouting(false)
{
}
~Private() {}
qreal leftMargin;
qreal rightMargin;
qreal topMargin;
qreal bottomMargin;
qreal spacing;
LayoutItem *parent;
LayoutAnimator *animator;
bool relayouting;
QRectF geometry;
};
Layout::Layout(LayoutItem *parent)
: LayoutItem(),
d(new Private(parent))
{
if (parent) {
parent->setLayout(this);
}
}
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::updateGeometry()
{
if (d->relayouting) {
return;
}
d->relayouting = true;
relayout();
d->relayouting = false;
}
QRectF Layout::geometry() const
{
return d->geometry;
}
void Layout::setGeometry(const QRectF &geometry)
{
if (!geometry.isValid() || geometry == d->geometry) {
return;
}
d->geometry = geometry;
invalidate();
}
void Layout::invalidate()
{
if (d->relayouting) {
return;
}
d->relayouting = true;
// find and update the top level layout
Layout *layout = this;
Layout *parentLayout = 0;
do {
parentLayout = dynamic_cast<Layout*>(layout->parent());
if (parentLayout) {
if (parentLayout->d->relayouting) {
break;
}
layout = parentLayout;
}
} while (parentLayout);
layout->relayout();
d->relayouting = false;
}
LayoutAnimator* Layout::animator() const
{
return d->animator;
}
void Layout::setAnimator(LayoutAnimator *animator)
{
d->animator = animator;
}
qreal Layout::margin(MarginEdge edge) const
{
switch (edge) {
case LeftMargin:
return d->leftMargin;
break;
case RightMargin:
return d->rightMargin;
break;
case TopMargin:
return d->topMargin;
break;
case BottomMargin:
return d->bottomMargin;
break;
}
return 0;
}
void Layout::setMargin(MarginEdge edge, qreal m)
{
switch (edge) {
case LeftMargin:
d->leftMargin = m;
break;
case RightMargin:
d->rightMargin = m;
break;
case TopMargin:
d->topMargin = m;
break;
case BottomMargin:
d->bottomMargin = m;
break;
}
}
void Layout::setMargin(qreal m)
{
d->leftMargin = m;
d->rightMargin = m;
d->topMargin = m;
d->bottomMargin = 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();
}
}
}
}