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plasma-framework/corona.cpp
Aaron J. Seigo 3b8fc737e4 * add a Phase object to the corona; start using it. 
TODO:
* use all the Phase transitions properly; this implies reworking the remove applet mechanism completely
* consider sharing Phase amongst all Coronas? should it be a singleton?

svn path=/trunk/KDE/kdebase/workspace/lib/plasma/; revision=673395
2007-06-10 06:24:42 +00:00

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/*
* Copyright (C) 2007 Matt Broadstone <mbroadst@gmail.com>
* Copyright (C) 2007 Aaron Seigo <aseigo@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 version 2 as
* published by the Free Software Foundation
*
* 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 <KLocale>
#include <KMenu>
#include <KRun>
#include <KWindowSystem>
#include <KDebug>
#include <KMimeType>
#include "applet.h"
#include "dataengine.h"
#include "karambamanager.h"
#include "phase.h"
#include "widgets/vboxlayout.h"
#include "widgets/icon.h"
using namespace Plasma;
namespace Plasma
{
class Corona::Private
{
public:
Private()
: formFactor(Planar),
location(Floating),
layout(0),
engineExplorerAction(0),
phase(new Phase)
{
}
~Private()
{
delete phase;
delete layout;
qDeleteAll(applets);
}
bool immutable;
Applet::List applets;
FormFactor formFactor;
Location location;
Layout* layout;
QAction *engineExplorerAction;
Phase* phase;
};
Corona::Corona(QObject * parent)
: QGraphicsScene(parent),
d(new Private)
{
init();
}
Corona::Corona(const QRectF & sceneRect, QObject * parent )
: QGraphicsScene(sceneRect, parent),
d(new Private)
{
init();
}
Corona::Corona(qreal x, qreal y, qreal width, qreal height, QObject * parent)
: QGraphicsScene(x, y, width, height, parent),
d(new Private)
{
init();
}
void Corona::init()
{
/* setBackgroundMode(Qt::NoBackground);*/
/* QPalette pal = palette();
pal.setBrush(QPalette::Base, Qt::transparent);
setPalette(pal);*/
//setViewport(new QGLWidget ( QGLFormat(QGL::StencilBuffer | QGL::AlphaChannel) ));
/*
KPluginInfo::List applets = Applet::knownApplets();
kDebug() << "======= Applets =========" << endl;
foreach (KPluginInfo* info, applets) {
kDebug() << info->pluginName() << ": " << info->name() << endl;
}
kDebug() << "=========================" << endl;
*/
// connect(this, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(displayContextMenu(QPoint)));
d->engineExplorerAction = new QAction(i18n("Engine Explorer"), this);
connect(d->engineExplorerAction, SIGNAL(triggered(bool)), this, SLOT(launchExplorer()));
d->immutable = false;
// setContextMenuPolicy(Qt::CustomContextMenu);
}
Corona::~Corona()
{
delete d;
}
Location Corona::location() const
{
return d->location;
}
void Corona::setLocation(Location location)
{
if (d->location == location) {
return;
}
d->location = location;
foreach (Applet* applet, d->applets) {
applet->constraintsUpdated();
}
}
FormFactor Corona::formFactor() const
{
return d->formFactor;
}
void Corona::setFormFactor(FormFactor formFactor)
{
if (d->formFactor == formFactor) {
return;
}
//kDebug() << "switching FF to " << formFactor << endl;
d->formFactor = formFactor;
delete d->layout;
d->layout = 0;
switch (d->formFactor) {
case Planar:
break;
case Horizontal:
//d->layout = new HBoxLayout;
break;
case Vertical:
d->layout = new VBoxLayout;
break;
case MediaCenter:
break;
default:
kDebug() << "This can't be happening!" << endl;
break;
}
foreach (Applet* applet, d->applets) {
applet->constraintsUpdated();
}
}
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::addPlasmoid(const QString& name)
{
Applet* applet = Applet::loadApplet(name);
if (applet) {
addItem(applet);
//applet->constraintsUpdated();
d->applets << applet;
connect(applet, SIGNAL(destroyed(QObject*)),
this, SLOT(appletDestroyed(QObject*)));
d->phase->animate(applet, Phase::Appear);
} else {
kDebug() << "Plasmoid " << name << " could not be loaded." << endl;
}
}
void Corona::addKaramba(const KUrl& path)
{
QGraphicsItemGroup* karamba = KarambaManager::loadKaramba(path, this);
if (karamba) {
addItem(karamba);
d->phase->animate(karamba, Phase::Appear);
} else {
kDebug() << "Karamba " << path << " could not be loaded." << endl;
}
}
void Corona::dragEnterEvent( QGraphicsSceneDragDropEvent *event)
{
kDebug() << "Corona::dragEnterEvent(QGraphicsSceneDragDropEvent* event)" << endl;
if (event->mimeData()->hasFormat("text/x-plasmoidservicename")) {
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);
}
//TODO Allow dragging an applet from another Corona into this one while
// keeping its settings etc.
}
void Corona::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
{
Q_UNUSED(event);
kDebug() << "Corona::dragLeaveEvent(QGraphicsSceneDragDropEvent* event)" << endl;
//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
}
void Corona::dragMoveEvent(QGraphicsSceneDragDropEvent *event)
{
Q_UNUSED(event);
kDebug() << "Corona::dragMoveEvent(QDragMoveEvent* event)" << endl;
}
void Corona::dropEvent(QGraphicsSceneDragDropEvent *event)
{
kDebug() << "Corona::dropEvent(QDropEvent* event)" << endl;
if (event->mimeData()->hasFormat("text/x-plasmoidservicename")) {
//TODO This will pretty much move into dragEnterEvent()
QString plasmoidName;
plasmoidName = event->mimeData()->data("text/x-plasmoidservicename");
addPlasmoid(plasmoidName);
d->applets.last()->setPos(event->pos());
event->acceptProposedAction();
} else if (KUrl::List::canDecode(event->mimeData())) {
KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
foreach (const KUrl& url, urls) {
Plasma::Icon *icon = new Plasma::Icon(0);
icon->setIcon(KMimeType::iconNameForUrl(url));
icon->setSize(128,128);
//TODO: associate the url with the icon, use the Button plasmoid here
icon->setPos(event->scenePos()-QPoint(icon->boundingRect().width()/2,icon->boundingRect().height()/2));
icon->show();
addItem(icon);
}
event->acceptProposedAction();
}
}
void Corona::contextMenuEvent(QGraphicsSceneContextMenuEvent *contextMenuEvent)
{
QPointF point = contextMenuEvent->scenePos();
/*
* example for displaying the SuperKaramba context menu
QGraphicsItem *item = itemAt(point);
if(item) {
QObject *object = dynamic_cast<QObject*>(item->parentItem());
if(object && object->objectName().startsWith("karamba")) {
QContextMenuEvent event(QContextMenuEvent::Mouse, point);
contextMenuEvent(&event);
return;
}
}
*/
contextMenuEvent->accept();
Applet* applet = qgraphicsitem_cast<Applet*>(itemAt(point));
KMenu desktopMenu;
kDebug() << "context menu event " << d->immutable << endl;
if (!applet) {
if (d->immutable) {
return;
}
desktopMenu.setTitle("Corona");
desktopMenu.addAction(d->engineExplorerAction);
} else {
desktopMenu.addTitle(applet->name());
desktopMenu.addSeparator();
QAction* configureApplet = new QAction(i18n("Configure Plasmoid..."), this);
connect(configureApplet, SIGNAL(triggered(bool)),
applet, SLOT(configureDialog())); //This isn't implemented in Applet yet...
desktopMenu.addAction(configureApplet);
if (!d->immutable) {
QAction* closeApplet = new QAction(i18n("Close Plasmoid"), this);
connect(closeApplet, SIGNAL(triggered(bool)),
applet, SLOT(deleteLater()));
desktopMenu.addAction(closeApplet);
}
}
desktopMenu.exec(point.toPoint());
}
void Corona::launchExplorer()
{
KRun::run("plasmaengineexplorer", KUrl::List(), 0);
}
void Corona::appletDestroyed(QObject* object)
{
// we do a static_cast here since it really isn't an Applet 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.
Applet* applet = static_cast<Plasma::Applet*>(object);
int index = d->applets.indexOf(applet);
if (index > -1) {
d->applets.removeAt(index);
}
}
bool Corona::isImmutable()
{
return d->immutable;
}
void Corona::setImmutable(bool immutable)
{
if (d->immutable == immutable) {
return;
}
d->immutable = immutable;
foreach (QGraphicsItem* item, items()) {
QGraphicsItem::GraphicsItemFlags flags = item->flags();
if (immutable) {
flags ^= QGraphicsItem::ItemIsMovable;
} else {
flags |= QGraphicsItem::ItemIsMovable;
}
item->setFlags(flags);
}
}
} // namespace Plasma
#include "corona.moc"
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