plasma-framework/corona.cpp
Aaron J. Seigo 72d632a234 this started out as a self contained patch just to merge two actions, but rapidly got out of hand ;)
* default to no config interface for containments
* merge the Appearance Settings and Configure actions for containments
* be even more careful with about-to-be-deleted widget (d->transient) including giving them a fake-but-valid scratchpad of a KConfigGroup if requested after deletd
* replace some method calls with direct access to the private members

svn path=/trunk/KDE/kdelibs/; revision=914890
2009-01-22 00:00:16 +00:00

572 lines
16 KiB
C++

/*
* Copyright 2007 Matt Broadstone <mbroadst@gmail.com>
* Copyright 2007 Aaron Seigo <aseigo@kde.org>
* Copyright 2007 Riccardo Iaconelli <riccardo@kde.org>
*
* 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 "corona.h"
#include <QApplication>
#include <QGraphicsView>
#include <QGraphicsSceneDragDropEvent>
#include <QGraphicsGridLayout>
#include <QMimeData>
#include <QPainter>
#include <QTimer>
#include <cmath>
#include <kdebug.h>
#include <kglobal.h>
#include <klocale.h>
#include <kmimetype.h>
#include "containment.h"
#include "view.h"
#include "private/applet_p.h"
#include "tooltipmanager.h"
using namespace Plasma;
namespace Plasma
{
// constant controlling how long between requesting a configuration sync
// and one happening should occur. currently 10 seconds
const int CONFIG_SYNC_TIMEOUT = 10000;
class CoronaPrivate
{
public:
CoronaPrivate(Corona *corona)
: q(corona),
immutability(Mutable),
mimetype("text/x-plasmoidservicename"),
config(0)
{
if (KGlobal::hasMainComponent()) {
configName = KGlobal::mainComponent().componentName() + "-appletsrc";
} else {
configName = "plasma-appletsrc";
}
}
~CoronaPrivate()
{
qDeleteAll(containments);
}
void init()
{
configSyncTimer.setSingleShot(true);
QObject::connect(&configSyncTimer, SIGNAL(timeout()), q, SLOT(syncConfig()));
}
void saveLayout(KSharedConfigPtr cg) const
{
KConfigGroup containmentsGroup(cg, "Containments");
foreach (const Containment *containment, containments) {
QString cid = QString::number(containment->id());
KConfigGroup containmentConfig(&containmentsGroup, cid);
containment->save(containmentConfig);
}
}
void updateContainmentImmutability()
{
foreach (Containment *c, containments) {
// we need to tell each containment that immutability has been altered
c->updateConstraints(ImmutableConstraint);
}
}
void containmentDestroyed(QObject *obj)
{
// we do a static_cast here since it really isn't an Containment by this
// point anymore since we are in the qobject dtor. we don't actually
// try and do anything with it, we just need the value of the pointer
// so this unsafe looking code is actually just fine.
Containment* containment = static_cast<Plasma::Containment*>(obj);
int index = containments.indexOf(containment);
if (index > -1) {
containments.removeAt(index);
q->requestConfigSync();
}
}
void syncConfig()
{
q->config()->sync();
emit q->configSynced();
}
Containment *addContainment(const QString &name, const QVariantList &args,
uint id, bool delayedInit)
{
QString pluginName = name;
Containment *containment = 0;
Applet *applet = 0;
//kDebug() << "Loading" << name << args << id;
if (pluginName.isEmpty()) {
// default to the desktop containment
pluginName = "desktop";
}
if (pluginName != "null") {
applet = Applet::load(pluginName, id, args);
containment = dynamic_cast<Containment*>(applet);
}
if (!containment) {
kDebug() << "loading of containment" << name << "failed.";
// in case we got a non-Containment from Applet::loadApplet or
// a null containment was requested
delete applet;
containment = new Containment(0, 0, id);
if (pluginName == "null") {
containment->setDrawWallpaper(false);
}
// we want to provide something and don't care about the failure to launch
containment->setFailedToLaunch(false);
containment->setFormFactor(Plasma::Planar);
}
q->addItem(containment);
static_cast<Applet*>(containment)->d->setIsContainment(true);
containments.append(containment);
if (!delayedInit) {
containment->init();
containment->updateConstraints(Plasma::StartupCompletedConstraint);
KConfigGroup cg = containment->config();
containment->save(cg);
q->requestConfigSync();
containment->flushPendingConstraintsEvents();
}
QObject::connect(containment, SIGNAL(destroyed(QObject*)),
q, SLOT(containmentDestroyed(QObject*)));
QObject::connect(containment, SIGNAL(configNeedsSaving()),
q, SLOT(requestConfigSync()));
QObject::connect(containment, SIGNAL(releaseVisualFocus()),
q, SIGNAL(releaseVisualFocus()));
QObject::connect(containment, SIGNAL(screenChanged(int,int,Plasma::Containment*)),
q, SIGNAL(screenOwnerChanged(int,int,Plasma::Containment*)));
if (!delayedInit) {
emit q->containmentAdded(containment);
}
return containment;
}
void offscreenWidgetDestroyed(QObject *);
Corona *q;
ImmutabilityType immutability;
QString mimetype;
QString configName;
KSharedConfigPtr config;
QTimer configSyncTimer;
QList<Containment*> containments;
QHash<uint, QGraphicsWidget*> offscreenWidgets;
};
Corona::Corona(QObject *parent)
: QGraphicsScene(parent),
d(new CoronaPrivate(this))
{
d->init();
ToolTipManager::self()->m_corona = this;
//setViewport(new QGLWidget(QGLFormat(QGL::StencilBuffer | QGL::AlphaChannel)));
}
Corona::~Corona()
{
// FIXME: Same fix as in Plasma::View - make sure that when the focused widget is
// destroyed we don't try to transfer it to something that's already been
// deleted.
clearFocus();
delete d;
}
void Corona::setAppletMimeType(const QString &type)
{
d->mimetype = type;
}
QString Corona::appletMimeType()
{
return d->mimetype;
}
void Corona::saveLayout(const QString &configName) const
{
KSharedConfigPtr c;
if (configName.isEmpty() || configName == d->configName) {
c = config();
} else {
c = KSharedConfig::openConfig(configName);
}
d->saveLayout(c);
}
void Corona::requestConfigSync()
{
// TODO: should we check into our immutability before doing this?
//NOTE: this is a pretty simplistic model: we simply save no more than CONFIG_SYNC_TIMEOUT
// after the first time this is called. not much of a heuristic for save points, but
// it should at least compress these activities a bit and provide a way for applet
// authors to ween themselves from the sync() disease. A more interesting/dynamic
// algorithm for determining when to actually sync() to disk might be better, though.
if (!d->configSyncTimer.isActive()) {
d->configSyncTimer.start(CONFIG_SYNC_TIMEOUT);
}
}
void Corona::requireConfigSync()
{
d->syncConfig();
}
void Corona::initializeLayout(const QString &configName)
{
clearContainments();
loadLayout(configName);
if (d->containments.isEmpty()) {
loadDefaultLayout();
if (!d->containments.isEmpty()) {
requestConfigSync();
}
}
if (config()->isImmutable()) {
d->updateContainmentImmutability();
}
KConfigGroup coronaConfig(config(), "General");
setImmutability((ImmutabilityType)coronaConfig.readEntry("immutability", (int)Mutable));
}
void Corona::loadLayout(const QString &configName)
{
KSharedConfigPtr c;
if (configName.isEmpty() || configName == d->configName) {
c = config();
} else {
c = KSharedConfig::openConfig(configName);
}
KConfigGroup containments(config(), "Containments");
foreach (const QString &group, containments.groupList()) {
KConfigGroup containmentConfig(&containments, group);
if (containmentConfig.entryMap().isEmpty()) {
continue;
}
int cid = group.toUInt();
//kDebug() << "got a containment in the config, trying to make a" << containmentConfig.readEntry("plugin", QString()) << "from" << group;
Containment *c = d->addContainment(containmentConfig.readEntry("plugin", QString()), QVariantList(),
cid, true);
if (!c) {
continue;
}
c->init();
c->restore(containmentConfig);
}
foreach (Containment *containment, d->containments) {
QString cid = QString::number(containment->id());
KConfigGroup containmentConfig(&containments, cid);
foreach (Applet *applet, containment->applets()) {
applet->init();
// We have to flush the applet constraints manually
applet->flushPendingConstraintsEvents();
}
containment->updateConstraints(Plasma::StartupCompletedConstraint);
containment->flushPendingConstraintsEvents();
emit containmentAdded(containment);
}
}
Containment *Corona::containmentForScreen(int screen, int desktop) const
{
foreach (Containment *containment, d->containments) {
if (containment->screen() == screen &&
(desktop < 0 || containment->desktop() == desktop) &&
(containment->containmentType() == Containment::DesktopContainment ||
containment->containmentType() >= Containment::CustomContainment)) {
return containment;
}
}
return 0;
}
QList<Containment*> Corona::containments() const
{
return d->containments;
}
void Corona::clearContainments()
{
foreach (Containment *containment, d->containments) {
containment->clearApplets();
}
}
KSharedConfigPtr Corona::config() const
{
if (!d->config) {
d->config = KSharedConfig::openConfig(d->configName);
}
return d->config;
}
Containment *Corona::addContainment(const QString &name, const QVariantList &args)
{
return d->addContainment(name, args, 0, false);
}
Containment *Corona::addContainmentDelayed(const QString &name, const QVariantList &args)
{
return d->addContainment(name, args, 0, true);
}
void Corona::addOffscreenWidget(QGraphicsWidget *widget)
{
if (d->offscreenWidgets.values().contains(widget)) {
kDebug() << "widget is already an offscreen widget!";
return;
}
widget->setParentItem(0);
//search for an empty spot in the topleft quadrant of the scene. each 'slot' is QWIDGETSIZE_MAX
//x QWIDGETSIZE_MAX, so we're guaranteed to never have to move widgets once they're placed here.
int i = 0;
while (d->offscreenWidgets.contains(i)) {
i++;
}
d->offscreenWidgets[i] = widget;
widget->setPos((-i - 1) * QWIDGETSIZE_MAX, -QWIDGETSIZE_MAX);
kDebug() << "adding offscreen widget at slot " << i;
connect(widget, SIGNAL(destroyed(QObject*)), this, SLOT(offscreenWidgetDestroyed(QObject*)));
}
void Corona::removeOffscreenWidget(QGraphicsWidget *widget)
{
QMutableHashIterator<uint, QGraphicsWidget *> it(d->offscreenWidgets);
while (it.hasNext()) {
if (it.next().value() == widget) {
it.remove();
return;
}
}
}
void CoronaPrivate::offscreenWidgetDestroyed(QObject *o)
{
// at this point, it's just a QObject, not a QGraphicsWidget, but we still need
// a pointer of the appropriate type.
// WARNING: DO NOT USE THE WIDGET POINTER FOR ANYTHING OTHER THAN POINTER COMPARISONS
QGraphicsWidget *widget = static_cast<QGraphicsWidget *>(o);
q->removeOffscreenWidget(widget);
}
int Corona::numScreens() const
{
return 1;
}
QRect Corona::screenGeometry(int id) const
{
Q_UNUSED(id);
if (views().isEmpty()) {
return sceneRect().toRect();
} else {
QGraphicsView *v = views()[0];
QRect r = sceneRect().toRect();
r.moveTo(v->mapToGlobal(v->pos()));
return r;
}
}
QRegion Corona::availableScreenRegion(int id) const
{
return QRegion(screenGeometry(id));
}
QPoint Corona::popupPosition(const QGraphicsItem *item, const QSize &s)
{
QGraphicsView *v = viewFor(item);
if (!v) {
return QPoint(0, 0);
}
QPoint pos;
QTransform sceneTransform = item->sceneTransform();
//if the applet is rotated the popup position has to be un-transformed
if (sceneTransform.isRotating()) {
qreal angle = acos(sceneTransform.m11());
QTransform newTransform;
QPointF center = item->sceneBoundingRect().center();
newTransform.translate(center.x(), center.y());
newTransform.rotateRadians(-angle);
newTransform.translate(-center.x(), -center.y());
pos = v->mapFromScene(newTransform.inverted().map(item->scenePos()));
} else {
pos = v->mapFromScene(item->scenePos());
}
pos = v->mapToGlobal(pos);
//kDebug() << "==> position is" << item->scenePos() << v->mapFromScene(item->scenePos()) << pos;
Plasma::View *pv = dynamic_cast<Plasma::View *>(v);
Plasma::Location loc = Floating;
if (pv && pv->containment()) {
loc = pv->containment()->location();
}
switch (loc) {
case BottomEdge:
pos = QPoint(pos.x(), pos.y() - s.height());
break;
case TopEdge:
pos = QPoint(pos.x(), pos.y() + (int)item->boundingRect().size().height());
break;
case LeftEdge:
pos = QPoint(pos.x() + (int)item->boundingRect().size().width(), pos.y());
break;
case RightEdge:
pos = QPoint(pos.x() - s.width(), pos.y());
break;
default:
if (pos.y() - s.height() > 0) {
pos = QPoint(pos.x(), pos.y() - s.height());
} else {
pos = QPoint(pos.x(), pos.y() + (int)item->boundingRect().size().height());
}
}
//are we out of screen?
QRect screenRect =
screenGeometry((pv && pv->containment()) ? pv->containment()->screen() : -1);
//kDebug() << "==> rect for" << (pv ? pv->containment()->screen() : -1) << "is" << screenRect;
if (loc != LeftEdge && pos.rx() + s.width() > screenRect.right()) {
pos.rx() -= ((pos.rx() + s.width()) - screenRect.right());
}
if (loc != TopEdge && pos.ry() + s.height() > screenRect.bottom()) {
pos.ry() -= ((pos.ry() + s.height()) - screenRect.bottom());
}
pos.rx() = qMax(0, pos.rx());
return pos;
}
void Corona::loadDefaultLayout()
{
}
void Corona::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
{
QGraphicsScene::dragEnterEvent(event);
}
void Corona::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
{
QGraphicsScene::dragLeaveEvent(event);
}
void Corona::dragMoveEvent(QGraphicsSceneDragDropEvent *event)
{
QGraphicsScene::dragMoveEvent(event);
}
ImmutabilityType Corona::immutability() const
{
return d->immutability;
}
void Corona::setImmutability(const ImmutabilityType immutable)
{
if (d->immutability == immutable ||
d->immutability == SystemImmutable) {
return;
}
kDebug() << "setting immutability to" << immutable;
d->immutability = immutable;
d->updateContainmentImmutability();
KConfigGroup cg(config(), "General");
// we call the dptr member directly for locked since isImmutable()
// also checks kiosk and parent containers
cg.writeEntry("immutability", (int)d->immutability);
requestConfigSync();
}
QList<Plasma::Location> Corona::freeEdges(int screen) const
{
QList<Plasma::Location> freeEdges;
freeEdges << Plasma::TopEdge << Plasma::BottomEdge
<< Plasma::LeftEdge << Plasma::RightEdge;
foreach (Containment *containment, containments()) {
if (containment->screen() == screen &&
freeEdges.contains(containment->location())) {
freeEdges.removeAll(containment->location());
}
}
return freeEdges;
}
} // namespace Plasma
#include "corona.moc"