plasma-framework/corona.cpp
Alex Merry d29805caef Make drag-n-drop applets work again.
svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=716003
2007-09-23 18:03:37 +00:00

366 lines
10 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 "karambamanager.h"
#include "phase.h"
#include "widgets/freelayout.h"
#include "widgets/boxlayout.h"
#include "widgets/icon.h"
using namespace Plasma;
namespace Plasma
{
class Corona::Private
{
public:
Private()
: immutable(false),
mimetype("text/x-plasmoidservicename")
{
}
~Private()
{
}
bool immutable;
QString mimetype;
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);
foreach (const QString& group, cg.groupList()) {
cg.deleteGroup(group);
}
QStringList containmentIds;
foreach (const Containment *containment, d->containments) {
QString cid = QString::number(containment->id());
KConfigGroup containmentConfig(&cg, cid.append("-containment"));
containment->saveConstraints(&containmentConfig);
containment->save(&containmentConfig);
foreach (const Applet* applet, containment->applets()) {
KConfigGroup appletConfig(&cg, QString::number(applet->id()).append("-applet"));
applet->save(&appletConfig);
}
}
}
void Corona::saveApplets() const
{
saveApplets("plasma-appletsrc");
}
void Corona::loadApplets(const QString& config)
{
clearApplets();
KConfig cg(config, KConfig::OnlyLocal);
QList<KConfigGroup> applets;
QHash<int, Containment*> containments;
foreach (const QString& group, cg.groupList()) {
KConfigGroup appletConfig(&cg, group);
if (group.contains("containment")) {
int cid = group.left(group.indexOf('-')).toUInt();
Containment *c = addContainment(appletConfig.readEntry("plugin", QString()), QVariantList(),
cid, true);
if (c) {
containments.insert(c->id(), c);
c->initConstraints(&appletConfig);
}
} else {
// it's an applet, let's grab the containment association
kDebug() << "insert multi " << group;
applets.append(appletConfig);
}
}
//int maxContainment = containments.size();
//kDebug() << "number of applets?" << applets.count();
foreach (KConfigGroup cg, applets) {
int cid = cg.readEntry("containment", 0);
kDebug() << "trying to load applet" << cg.group() << cid;
Containment* c = containments.value(cid, 0);
if (!c) {
continue;
}
kDebug() << "loading containment " << cid;
kDebug() << "creating applet " << cg.group();
int appId = cg.group().left(cg.group().indexOf('-')).toUInt();
c->addApplet(cg.readEntry("plugin", QString()), QVariantList(),
appId, cg.readEntry("geometry", QRectF()), true);
}
foreach (Containment* c, containments) {
QString cid = QString::number(c->id());
KConfigGroup containmentConfig(&cg, cid.append("-containment"));
c->setImmutable(containmentConfig.isImmutable());
}
if (d->containments.count() < 1) {
loadDefaultSetup();
}
foreach (Containment* containment, d->containments) {
containment->init();
foreach(Applet* applet, containment->applets()) {
applet->init();
}
}
setImmutable(cg.isImmutable());
}
void Corona::loadApplets()
{
loadApplets("plasma-appletsrc");
}
void Corona::loadDefaultSetup()
{
//FIXME: implement support for system-wide defaults
QDesktopWidget desktop;
int numScreens = desktop.numScreens();
// create a containment for each screen
for (int i = 0; i < numScreens; ++i) {
Containment* c = addContainment("default");
c->setScreen(i);
c->setFormFactor(Plasma::Planar);
}
}
Containment* Corona::containmentForScreen(int screen) const
{
foreach (Containment* containment, d->containments) {
if (containment->screen() == screen) {
return containment;
}
}
return 0;
}
void Corona::clearApplets()
{
foreach (Containment* containment, d->containments) {
containment->clearApplets();
}
}
Containment* Corona::addContainment(const QString& name, const QVariantList& args, uint id, bool delayedInit)
{
Containment* containment = 0;
Applet* applet = 0;
if (!name.isEmpty()) {
applet = Applet::loadApplet(name, id, args);
containment = dynamic_cast<Containment*>(applet);
}
if (!containment) {
delete applet; // in case we got a non-Containment from Applet::loadApplet
containment = new Containment;
containment->setFailedToLaunch(false); // we want to provide something and don't care about the failure to launch
}
addItem(containment);
if (!delayedInit) {
containment->init();
}
// in case it was set in the Containment (or Applet), we don't want this
containment->setDrawStandardBackground(false);
d->containments.append(containment);
connect(containment, SIGNAL(destroyed(QObject*)),
this, SLOT(containmentDestroyed(QObject*)));
return containment;
}
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::addKaramba(const KUrl& path)
{
//FIXME: i think this is slightly broken now that we have containments?
// it should go into a containment...
QGraphicsItemGroup* karamba = KarambaManager::loadKaramba(path, this);
if (karamba) {
addItem(karamba);
Phase::self()->animateItem(karamba, Phase::Appear);
} else {
kDebug() << "Karamba " << path << " could not be loaded.";
}
}
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);
}
}
bool Corona::isImmutable() const
{
return d->immutable;
}
void Corona::setImmutable(bool immutable)
{
if (d->immutable == immutable) {
return;
}
d->immutable = immutable;
foreach (QGraphicsItem* item, items()) {
item->setFlag(QGraphicsItem::ItemIsMovable, immutable);
}
}
} // namespace Plasma
#include "corona.moc"