plasma-framework/corona.cpp
2008-04-11 11:54:59 +00:00

471 lines
14 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 <QDesktopWidget>
#include <QGraphicsSceneDragDropEvent>
#include <QMimeData>
#include <QPainter>
#include <QTimer>
#include <KDebug>
#include <KGlobal>
#include <KLocale>
#include <KMimeType>
#include "containment.h"
using namespace Plasma;
namespace Plasma
{
// constant controling how long between requesting a configuration sync
// and one happening should occur. currently 2 minutes.
const int CONFIG_SYNC_TIMEOUT = 120000;
class Corona::Private
{
public:
Private()
: immutable(false),
kioskImmutable(false),
mimetype("text/x-plasmoidservicename"),
config(0)
{
if (KGlobal::hasMainComponent()) {
configName = KGlobal::mainComponent().componentName() + "-appletsrc";
} else {
configName = "plasma-appletsrc";
}
}
~Private()
{
qDeleteAll(containments);
}
void init(Corona* q)
{
configSyncTimer.setSingleShot(true);
connect(&configSyncTimer, SIGNAL(timeout()), q, SLOT(syncConfig()));
const int w = 25;
QPixmap tile(w * 2, w * 2);
tile.fill(q->palette().base().color());
QPainter pt(&tile);
QColor color = q->palette().mid().color();
color.setAlphaF(.6);
pt.fillRect(0, 0, w, w, color);
pt.fillRect(w, w, w, w, color);
pt.end();
QBrush b(tile);
q->setBackgroundBrush(tile);
}
void saveApplets(KSharedConfigPtr cg) const
{
KConfigGroup containmentsGroup(cg, "Containments");
foreach (const Containment *containment, containments) {
QString cid = QString::number(containment->id());
KConfigGroup containmentConfig(&containmentsGroup, cid);
containment->saveConstraints(&containmentConfig);
containment->save(&containmentConfig);
KConfigGroup applets(&containmentConfig, "Applets");
foreach (const Applet* applet, containment->applets()) {
KConfigGroup appletConfig(&applets, QString::number(applet->id()));
applet->save(&appletConfig);
}
}
}
void updateContainmentImmutability()
{
foreach (Containment *c, containments) {
// we need to tell each containment that immutability has been altered
c->updateConstraints(ImmutableConstraint);
}
}
bool immutable;
bool kioskImmutable;
QString mimetype;
QString configName;
KSharedConfigPtr config;
QTimer configSyncTimer;
QList<Containment*> containments;
};
Corona::Corona(QObject *parent)
: QGraphicsScene(parent),
d(new Private)
{
d->init(this);
//setViewport(new QGLWidget(QGLFormat(QGL::StencilBuffer | QGL::AlphaChannel)));
}
Corona::Corona(const QRectF & sceneRect, QObject * parent )
: QGraphicsScene(sceneRect, parent),
d(new Private)
{
d->init(this);
//setViewport(new QGLWidget(QGLFormat(QGL::StencilBuffer | QGL::AlphaChannel)));
}
Corona::Corona(qreal x, qreal y, qreal width, qreal height, QObject * parent)
: QGraphicsScene(x, y, width, height, parent),
d(new Private)
{
d->init(this);
//setViewport(new QGLWidget(QGLFormat(QGL::StencilBuffer | QGL::AlphaChannel)));
}
Corona::~Corona()
{
KConfigGroup cg(config(), "General");
// we call the dptr member directly for locked since isImmutable()
// also checks kiosk and parent containers
cg.writeEntry("locked", d->immutable);
delete d;
}
QRectF Corona::maxSizeHint() const
{
//FIXME: this is a bit of a naive implementation, do you think? =)
// we should factor in how much space we actually have left!
return sceneRect();
}
void Corona::setAppletMimeType(const QString& type)
{
d->mimetype = type;
}
QString Corona::appletMimeType()
{
return d->mimetype;
}
void Corona::saveApplets(const QString &configName) const
{
KSharedConfigPtr c;
if (configName.isEmpty() || configName == d->configName) {
c = config();
} else {
c = KSharedConfig::openConfig(configName);
}
d->saveApplets(c);
}
void Corona::scheduleConfigSync() const
{
//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);
}
}
bool appletConfigLessThan(const KConfigGroup &c1, const KConfigGroup &c2)
{
QPointF p1 = c1.readEntry("geometry", QRectF()).topLeft();
QPointF p2 = c2.readEntry("geometry", QRectF()).topLeft();
if (p1.x() != p2.x()) {
return p1.x() < p2.x();
}
return p1.y() < p2.y();
}
void Corona::loadApplets(const QString& configName)
{
clearApplets();
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 = addContainment(containmentConfig.readEntry("plugin", QString()), QVariantList(),
cid, true);
if (!c) {
continue;
}
addItem(c);
c->init();
c->loadConstraints(&containmentConfig);
c->flushUpdatedConstraints();
//kDebug() << "Containment" << c->id() << "geometry is" << c->geometry().toRect() << "config'd with" << appletConfig.name();
KConfigGroup applets(&containmentConfig, "Applets");
// Sort the applet configs in order of geometry to ensure that applets
// are added from left to right or top to bottom for a panel containment
QList<KConfigGroup> appletConfigs;
foreach (const QString &appletGroup, applets.groupList()) {
//kDebug() << "reading from applet group" << appletGroup;
KConfigGroup appletConfig(&applets, appletGroup);
appletConfigs.append(appletConfig);
}
qSort(appletConfigs.begin(), appletConfigs.end(), appletConfigLessThan);
foreach (KConfigGroup appletConfig, appletConfigs) {
int appId = appletConfig.name().toUInt();
//kDebug() << "the name is" << appletConfig.name();
QString plugin = appletConfig.readEntry("plugin", QString());
if (plugin.isEmpty()) {
continue;
}
Applet *applet = c->addApplet(plugin, QVariantList(), appId, appletConfig.readEntry("geometry", QRectF()), true);
applet->restore(&appletConfig);
}
}
if (d->containments.count() < 1) {
loadDefaultSetup();
} else {
foreach (Containment* containment, d->containments) {
QString cid = QString::number(containment->id());
KConfigGroup containmentConfig(&containments, cid);
foreach(Applet* applet, containment->applets()) {
applet->init();
}
containment->updateConstraints(Plasma::StartupCompletedConstraint);
containment->flushUpdatedConstraints();
emit containmentAdded(containment);
}
}
d->kioskImmutable = config()->isImmutable();
if (d->kioskImmutable) {
d->updateContainmentImmutability();
}
KConfigGroup coronaConfig(config(), "General");
setImmutable(coronaConfig.readEntry("locked", false));
}
void Corona::loadDefaultSetup()
{
}
Containment* Corona::containmentForScreen(int screen) const
{
foreach (Containment* containment, d->containments) {
if (containment->screen() == screen &&
(containment->containmentType() == Containment::DesktopContainment ||
containment->containmentType() == Containment::CustomContainment)) {
return containment;
}
}
return 0;
}
QList<Containment*> Corona::containments() const
{
return d->containments;
}
void Corona::clearApplets()
{
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, 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";
} else 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);
// we want to provide something and don't care about the failure to launch
containment->setFailedToLaunch(false);
containment->setFormFactor(Plasma::Planar);
}
containment->setIsContainment(true);
if (!delayedInit) {
addItem(containment);
containment->init();
containment->updateConstraints(Plasma::StartupCompletedConstraint);
}
d->containments.append(containment);
connect(containment, SIGNAL(destroyed(QObject*)),
this, SLOT(containmentDestroyed(QObject*)));
connect(containment, SIGNAL(launchActivated()),
SIGNAL(launchActivated()));
connect(containment, SIGNAL(configNeedsSaving()),
SLOT(scheduleConfigSync()));
connect(containment, SIGNAL(screenChanged(int,int,Plasma::Containment*)),
this, SIGNAL(screenOwnerChanged(int,int,Plasma::Containment*)));
if (!delayedInit) {
emit containmentAdded(containment);
}
return containment;
}
void Corona::destroyContainment(Containment *c)
{
if (!d->containments.contains(c)) {
return;
}
d->containments.removeAll(c);
c->config().deleteGroup();
c->deleteLater();
}
void Corona::dragEnterEvent( QGraphicsSceneDragDropEvent *event)
{
// kDebug() << "Corona::dragEnterEvent(QGraphicsSceneDragDropEvent* event)";
if (event->mimeData()->hasFormat(d->mimetype) ||
KUrl::List::canDecode(event->mimeData())) {
event->acceptProposedAction();
//TODO Create the applet, move to mouse position then send the
// following event to lock it to the mouse
//QMouseEvent event(QEvent::MouseButtonPress, event->pos(), Qt::LeftButton, event->mouseButtons(), 0);
//QApplication::sendEvent(this, &event);
}
event->accept();
//TODO Allow dragging an applet from another Corona into this one while
// keeping its settings etc.
}
void Corona::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
{
// kDebug() << "Corona::dragLeaveEvent(QGraphicsSceneDragDropEvent* event)";
//TODO If an established Applet is dragged out of the Corona, remove it and
// create a QDrag type thing to keep the Applet's settings
QGraphicsScene::dragLeaveEvent(event);
}
void Corona::dragMoveEvent(QGraphicsSceneDragDropEvent *event)
{
QGraphicsScene::dragMoveEvent(event);
event->accept();
//kDebug() << "Corona::dragMoveEvent(QDragMoveEvent* event)";
}
void Corona::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 = d->containments.indexOf(containment);
if (index > -1) {
d->containments.removeAt(index);
}
}
void Corona::syncConfig()
{
config()->sync();
}
bool Corona::isImmutable() const
{
return d->kioskImmutable || d->immutable;
}
bool Corona::isKioskImmutable() const
{
return d->kioskImmutable;
}
void Corona::setImmutable(bool immutable)
{
if (d->immutable == immutable ||
(!immutable && d->kioskImmutable)) {
return;
}
kDebug() << "setting immutability to" << immutable;
d->immutable = immutable;
d->updateContainmentImmutability();
}
} // namespace Plasma
#include "corona.moc"