plasma-framework/corona.cpp
Aaron J. Seigo 57f73a4dc1 propagate constraints update on immutability change
svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=745247
2007-12-05 20:27:16 +00:00

486 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 <QUrl>
#include <QGraphicsView>
#include <QStringList>
#include <KDebug>
#include <KLocale>
#include <KMimeType>
#include <KWindowSystem>
#include "containment.h"
#include "dataengine.h"
#include "phase.h"
#include "layouts/layout.h"
#include "widgets/icon.h"
using namespace Plasma;
namespace Plasma
{
class Corona::Private
{
public:
Private()
: immutable(false),
mimetype("text/x-plasmoidservicename"),
configName("plasma-appletsrc"),
config(0)
{
}
~Private()
{
qDeleteAll(containments);
}
void init(Corona* q)
{
QObject::connect(QApplication::desktop(), SIGNAL(resized(int)), q, SLOT(screenResized(int)));
}
bool immutable;
bool kioskImmutable;
QString mimetype;
QString configName;
KSharedConfigPtr config;
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()
{
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 &config) const
{
KConfig cg(config);
d->configName = config;
KConfigGroup containments(&cg, "Containments");
foreach (const Containment *containment, d->containments) {
QString cid = QString::number(containment->id());
KConfigGroup containmentConfig(&containments, 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 Corona::saveApplets() const
{
saveApplets(d->configName);
}
void Corona::loadApplets(const QString& configName)
{
clearApplets();
d->configName = configName;
KConfig config(configName, KConfig::SimpleConfig);
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);
//kDebug() << "Containment" << c->id() << "geometry is" << c->geometry().toRect() << "config'd with" << appletConfig.name();
KConfigGroup applets(&containmentConfig, "Applets");
foreach (const QString &appletGroup, applets.groupList()) {
//kDebug() << "reading from applet group" << appletGroup;
int appId = appletGroup.toUInt();
KConfigGroup appletConfig(&applets, appletGroup);
//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);
Q_UNUSED(applet)
// FIXME: the transform does not stick; it gets set then almost immediately reset.
// find out why and then reenable this
/*
QList<qreal> m = cg.readEntry("transform", QList<qreal>());
if (m.count() == 9) {
QTransform t(m[0], m[1], m[2], m[3], m[4], m[5], m[6], m[7], m[8]);
applet->setTransform(t);
}
*/
}
}
if (d->containments.count() < 1) {
loadDefaultSetup();
} else {
foreach (Containment* containment, d->containments) {
QString cid = QString::number(containment->id());
KConfigGroup containmentConfig(&containments, cid);
containment->setImmutable(containmentConfig.isImmutable());
foreach(Applet* applet, containment->applets()) {
applet->init();
}
containment->flushUpdatedConstraints();
}
// quick sanity check to ensure we have containments for each screen!
int numScreens = QApplication::desktop()->numScreens();
for (int i = 0; i < numScreens; ++i) {
if (!containmentForScreen(i)) {
//TODO: should we look for containments that aren't asigned but already exist?
Containment* c = addContainment("desktop");
c->setScreen(i);
c->setFormFactor(Plasma::Planar);
}
}
}
d->kioskImmutable = config.isImmutable();
}
void Corona::loadApplets()
{
loadApplets(d->configName);
}
void Corona::loadDefaultSetup()
{
//FIXME: implement support for system-wide defaults
QDesktopWidget *desktop = QApplication::desktop();
int numScreens = desktop->numScreens();
kDebug() << "number of screens is" << numScreens;
int topLeftScreen = 0;
QPoint topLeftCorner = desktop->screenGeometry(0).topLeft();
// create a containment for each screen
for (int i = 0; i < numScreens; ++i) {
QRect g = desktop->screenGeometry(i);
kDebug() << " screen " << i << "geometry is" << g;
Containment* c = addContainment("desktop");
c->setScreen(i);
c->setFormFactor(Plasma::Planar);
if (g.x() <= topLeftCorner.x() && g.y() >= topLeftCorner.y()) {
topLeftCorner = g.topLeft();
topLeftScreen = i;
}
}
// make a panel at the bottom
Containment* panel = addContainment("panel");
panel->setScreen(topLeftScreen);
panel->setLocation(Plasma::BottomEdge);
// some default applets to get a usable UI
panel->addApplet("launcher");
panel->addApplet("tasks");
panel->addApplet("systemtray");
panel->addApplet("notifier");
panel->addApplet("digital-clock");
// trigger an instant layout so we immediately have a proper geometry rather than waiting around
// for the event loop
panel->flushUpdatedConstraints();
if (panel->layout()) {
panel->layout()->invalidate();
}
/*
* a little snip that adds another panel, this time to the left
*
panel = addContainment("panel");
panel->setScreen(topLeftScreen);
//TODO: but .. *where* on the left edge?
panel->setLocation(Plasma::LeftEdge);
*/
// in case something goes bad during runtime, let's at least save this to disk right away
config()->sync();
}
Containment* Corona::containmentForScreen(int screen) const
{
foreach (Containment* containment, d->containments) {
if (containment->screen() == screen &&
containment->containmentType() == Containment::DesktopContainment) {
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()
{
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::loadApplet(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;
// 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();
}
d->containments.append(containment);
connect(containment, SIGNAL(destroyed(QObject*)),
this, SLOT(containmentDestroyed(QObject*)));
connect(containment, SIGNAL(launchActivated()),
SIGNAL(launchActivated()));
return containment;
}
void Corona::destroyContainment(Containment *c)
{
if (!d->containments.contains(c)) {
return;
}
d->containments.removeAll(c);
c->config().deleteGroup();
c->deleteLater();
}
Applet* Corona::addApplet(const QString& name, const QVariantList& args, uint id, const QRectF& geometry)
{
if (d->containments.size() < 1) {
kDebug() << "No containments to add an applet to!" << endl;
//FIXME create a containment if one doesn't exist ... ?
return 0;
}
return d->containments[0]->addApplet(name, args, id, geometry);
}
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::screenResized(int screen)
{
foreach (Containment *c, d->containments) {
if (c->screen() == screen) {
// trigger a relayout
c->setScreen(screen);
return;
}
}
// a new screen appeared. neat.
// FIXME: apparently QDesktopWidget doesn't do the Right Thing when a new screen is plugged in
// at runtime. seems it gets confused and thinks it's all one big screen? need to
// fix this upstream
Containment* c = addContainment("desktop");
c->setScreen(screen);
c->setFormFactor(Plasma::Planar);
emit newScreen(screen);
}
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) {
return;
}
d->immutable = immutable;
foreach (Containment *c, d->containments) {
// we need to tell each containment that immutability has been altered
// TODO: should we tell the applets too?
c->updateConstraints(ImmutableConstraint);
}
}
} // namespace Plasma
#include "corona.moc"