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plasma-framework/containment.cpp
Marco Martin 0c283924be API reviews: 
killed drawStandardBackground() and shadowShown()
now the two properties are merged in backgroundHints() and
setBackgroundHints() using the combination of BackgroundHints flags

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=801282
2008-04-26 09:13:57 +00:00

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/*
* Copyright 2007 by Aaron Seigo <aseigo@kde.org>
* Copyright 2008 by Ménard Alexis <darktears31@gmail.com>
*
* 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 "containment.h"
#include "containment_p.h"
#include <QAction>
#include <QDesktopWidget>
#include <QFile>
#include <QGraphicsSceneContextMenuEvent>
#include <QGraphicsView>
#include <QMimeData>
#include <QPainter>
#include <QStyleOptionGraphicsItem>
#include <QGraphicsLayout>
#include <QGraphicsLinearLayout>
#include <KApplication>
#include <KAuthorized>
#include <KIcon>
#include <KMenu>
#include <KMimeType>
#include <KRun>
#include <KServiceTypeTrader>
#include <KStandardDirs>
#include <KWindowSystem>
#include "applethandle_p.h"
#include "corona.h"
#include "animator.h"
#include "desktoptoolbox_p.h"
#include "paneltoolbox_p.h"
#include "svg.h"
namespace Plasma
{
Containment::StyleOption::StyleOption()
: QStyleOptionGraphicsItem(),
view(0)
{
}
Containment::StyleOption::StyleOption(const Containment::StyleOption & other)
: QStyleOptionGraphicsItem(other),
view(other.view)
{
}
Containment::StyleOption::StyleOption(const QStyleOptionGraphicsItem &other)
: QStyleOptionGraphicsItem(other),
view(0)
{
}
Containment::Containment(QGraphicsItem* parent,
const QString& serviceId,
uint containmentId)
: Applet(parent, serviceId, containmentId),
d(new Private(this))
{
// WARNING: do not access config() OR globalConfig() in this method!
// that requires a scene, which is not available at this point
setPos(0, 0);
setBackgroundHints(DefaultBackground);
setContainmentType(CustomContainment);
}
Containment::Containment(QObject* parent, const QVariantList& args)
: Applet(parent, args),
d(new Private(this))
{
// WARNING: do not access config() OR globalConfig() in this method!
// that requires a scene, which is not available at this point
setPos(0, 0);
setBackgroundHints(NoBackground);
}
Containment::~Containment()
{
delete d;
}
void Containment::init()
{
setCacheMode(NoCache);
setFlag(QGraphicsItem::ItemIsMovable, false);
setFlag(QGraphicsItem::ItemClipsChildrenToShape, false);
setAcceptDrops(true);
setAcceptsHoverEvents(true);
//TODO: would be nice to not do this on init, as it causes Animator to init
connect(Animator::self(), SIGNAL(animationFinished(QGraphicsItem*,Plasma::Animator::Animation)),
this, SLOT(appletAnimationComplete(QGraphicsItem*,Plasma::Animator::Animation)));
if (d->type == NoContainmentType) {
setContainmentType(DesktopContainment);
}
Applet::init();
}
// helper function for sorting the list of applets
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 Containment::loadContainment(KConfigGroup* group)
{
/*kDebug() << "!!!!!!!!!!!!initConstraints" << group->name() << containmentType();
kDebug() << " location:" << group->readEntry("location", (int)d->location);
kDebug() << " geom:" << group->readEntry("geometry", geometry());
kDebug() << " formfactor:" << group->readEntry("formfactor", (int)d->formFactor);
kDebug() << " screen:" << group->readEntry("screen", d->screen);*/
QRectF geo = group->readEntry("geometry", geometry());
//override max/min
if (geo.size() != geo.size().boundedTo(maximumSize())) {
setMaximumSize(maximumSize().expandedTo(geo.size()));
}
if (geo.size() != geo.size().expandedTo(minimumSize())) {
setMinimumSize(minimumSize().boundedTo(geo.size()));
}
setGeometry(geo);
setLocation((Plasma::Location)group->readEntry("location", (int)d->location));
setFormFactor((Plasma::FormFactor)group->readEntry("formfactor", (int)d->formFactor));
setScreen(group->readEntry("screen", d->screen));
flushUpdatedConstraints();
//kDebug() << "Containment" << id() << "geometry is" << geometry() << "config'd with" << appletConfig.name();
KConfigGroup applets(group, "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 = d->addApplet(plugin, QVariantList(), appletConfig.readEntry("geometry", QRectF()), appId, true);
applet->restore(&appletConfig);
}
}
void Containment::saveContainment(KConfigGroup* group) const
{
// locking is saved in Applet::save
group->writeEntry("screen", d->screen);
group->writeEntry("formfactor", (int)d->formFactor);
group->writeEntry("location", (int)d->location);
}
Containment::Type Containment::containmentType() const
{
return d->type;
}
void Containment::setContainmentType(Containment::Type type)
{
d->type = type;
if (isContainment() && type == DesktopContainment) {
if (!d->toolBox) {
QGraphicsWidget *addWidgetTool = addToolBoxTool("addwidgets", "list-add", i18n("Add Widgets"));
connect(addWidgetTool, SIGNAL(clicked()), this, SLOT(triggerShowAddWidgets()));
QGraphicsWidget *zoomInTool = addToolBoxTool("zoomIn", "zoom-in", i18n("Zoom In"));
connect(zoomInTool, SIGNAL(clicked()), this, SLOT(zoomIn()));
QGraphicsWidget *zoomOutTool = addToolBoxTool("zoomOut", "zoom-out", i18n("Zoom Out"));
connect(zoomOutTool, SIGNAL(clicked()), this, SLOT(zoomOut()));
if (immutability() != SystemImmutable) {
QGraphicsWidget *lockTool = addToolBoxTool("lockWidgets", "object-locked",
immutability() == UserImmutable ? i18n("Unlock Widgets") :
i18n("Lock Widgets"));
connect(lockTool, SIGNAL(clicked()), this, SLOT(toggleDesktopImmutability()));
}
QGraphicsWidget *activityTool = addToolBoxTool("addSiblingContainment", "list-add", i18n("Add Activity"));
connect(activityTool, SIGNAL(clicked()), this, SLOT(addSiblingContainment()));
}
} else if (isContainment() && type == PanelContainment) {
if (!d->toolBox) {
d->createToolBox();
d->toolBox->setSize(22);
d->toolBox->setIconSize(QSize(16, 16));
}
} else {
delete d->toolBox;
d->toolBox = 0;
}
}
Corona* Containment::corona() const
{
return dynamic_cast<Corona*>(scene());
}
void Containment::contextMenuEvent(QGraphicsSceneContextMenuEvent* event)
{
//kDebug() << "let's see if we manage to get a context menu here, huh";
if (!isContainment() || !scene() || !KAuthorized::authorizeKAction("desktop_contextmenu")) {
Applet::contextMenuEvent(event);
return;
}
QPointF point = event->scenePos();
QGraphicsItem* item = scene()->itemAt(point);
if (item == this) {
item = 0;
}
Applet* applet = 0;
while (item) {
applet = qgraphicsitem_cast<Applet*>(item);
if (applet && !applet->isContainment()) {
break;
}
// applet may have a value due to finding a containment!
applet = 0;
item = item->parentItem();
}
KMenu desktopMenu;
//kDebug() << "context menu event " << (QObject*)applet;
if (applet) {
bool hasEntries = false;
QList<QAction*> actions = applet->contextualActions();
if (!actions.isEmpty()) {
foreach(QAction* action, actions) {
desktopMenu.addAction(action);
}
hasEntries = true;
}
if (applet->hasConfigurationInterface()) {
QAction* configureApplet = new QAction(i18n("%1 Settings", applet->name()), &desktopMenu);
configureApplet->setIcon(KIcon("configure"));
connect(configureApplet, SIGNAL(triggered(bool)),
applet, SLOT(showConfigurationInterface()));
desktopMenu.addAction(configureApplet);
hasEntries = true;
}
QList<QAction*> containmentActions = contextualActions();
if (!containmentActions.isEmpty()) {
if (hasEntries) {
desktopMenu.addSeparator();
}
hasEntries = true;
QMenu *containmentActionMenu = &desktopMenu;
if (!actions.isEmpty() && containmentActions.count() > 2) {
containmentActionMenu = new KMenu(i18n("%1 Options", name()), &desktopMenu);
desktopMenu.addMenu(containmentActionMenu);
}
foreach(QAction* action, containmentActions) {
containmentActionMenu->addAction(action);
}
}
if (scene() && !static_cast<Corona*>(scene())->immutability() != NotImmutable) {
if (hasEntries) {
desktopMenu.addSeparator();
}
QAction* closeApplet = new QAction(i18n("Remove this %1", applet->name()), &desktopMenu);
QVariant appletV;
appletV.setValue((QObject*)applet);
closeApplet->setData(appletV);
closeApplet->setIcon(KIcon("edit-delete"));
connect(closeApplet, SIGNAL(triggered(bool)), this, SLOT(destroyApplet()));
desktopMenu.addAction(closeApplet);
hasEntries = true;
}
if (!hasEntries) {
Applet::contextMenuEvent(event);
kDebug() << "no entries";
return;
}
} else {
if (!scene() || (static_cast<Corona*>(scene())->immutability() != NotImmutable && !KAuthorized::authorizeKAction("unlock_desktop"))) {
//kDebug() << "immutability";
Applet::contextMenuEvent(event);
return;
}
QList<QAction*> actions = contextualActions();
if (actions.count() < 1) {
//kDebug() << "no applet, but no actions";
Applet::contextMenuEvent(event);
return;
}
foreach(QAction* action, actions) {
desktopMenu.addAction(action);
}
}
event->accept();
//kDebug() << "executing at" << event->screenPos();
desktopMenu.exec(event->screenPos());
}
void Containment::setFormFactor(FormFactor formFactor)
{
if (d->formFactor == formFactor && layout()) {
return;
}
//kDebug() << "switching FF to " << formFactor;
FormFactor was = d->formFactor;
createLayout(formFactor);
d->formFactor = formFactor;
if (isContainment() && containmentType() == PanelContainment && was != formFactor) {
// we are a panel and we have chaged our orientation
d->positionPanel(true);
}
QGraphicsLayout *lay = layout();
QGraphicsLinearLayout * linearLay = dynamic_cast<QGraphicsLinearLayout *>(lay);
if (linearLay) {
foreach (Applet* applet, d->applets) {
applet->updateConstraints(Plasma::FormFactorConstraint);
}
}
updateConstraints(Plasma::FormFactorConstraint);
}
void Containment::createLayout(FormFactor formFactor)
{
//note: setting a new layout autodeletes the old one
//and creating a layout calls setLayout on the parent
switch (formFactor) {
case Planar:
case MediaCenter:
//setLayout(new QGraphicsLinearLayout());
break;
case Horizontal: {
if
(!layout())
{
QGraphicsLinearLayout *lay = new QGraphicsLinearLayout();
lay->setOrientation(Qt::Horizontal);
lay->setContentsMargins(0, 0, 0, 0);
lay->setSpacing(4);
lay->setSizePolicy(QSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding));
setLayout(lay);
}
else
{
QGraphicsLayout *lay = layout();
QGraphicsLinearLayout * linearLay = dynamic_cast<QGraphicsLinearLayout *>(lay);
if (linearLay) {
linearLay->setOrientation(Qt::Horizontal);
}
}
break;
}
case Vertical: {
if
(!layout())
{
QGraphicsLinearLayout *lay = new QGraphicsLinearLayout();
lay->setOrientation(Qt::Vertical);
lay->setContentsMargins(0, 0, 0, 0);
lay->setSpacing(4);
setLayout(lay);
}
else
{
QGraphicsLayout *lay = layout();
QGraphicsLinearLayout * linearLay = dynamic_cast<QGraphicsLinearLayout *>(lay);
if (linearLay) {
linearLay->setOrientation(Qt::Vertical);
}
}
break;
}
default:
kDebug() << "This can't be happening! Or... can it? ;)" << d->formFactor;
//setLayout(0); //auto-delete
break;
}
}
FormFactor Containment::formFactor() const
{
if (isContainment()) {
return d->formFactor;
}
return Applet::formFactor();
}
void Containment::setLocation(Location location)
{
if (d->location == location) {
return;
}
bool emitGeomChange = false;
if ((location == TopEdge || location == BottomEdge) &&
(d->location == TopEdge || d->location == BottomEdge)) {
emitGeomChange = true;
}
if ((location == RightEdge || location == LeftEdge) &&
(d->location == RightEdge || d->location == LeftEdge)) {
emitGeomChange = true;
}
d->location = location;
foreach (Applet* applet, d->applets) {
applet->updateConstraints(Plasma::LocationConstraint);
}
if (emitGeomChange) {
// our geometry on the scene will not actually change,
// but for the purposes of views it has
emit geometryChanged();
}
updateConstraints(Plasma::LocationConstraint);
}
Location Containment::location() const
{
return d->location;
}
void Containment::addSiblingContainment()
{
emit addSiblingContainment(this);
}
void Containment::clearApplets()
{
qDeleteAll(d->applets);
d->applets.clear();
}
Applet* Containment::addApplet(const QString& name, const QVariantList& args, const QRectF &appletGeometry)
{
return d->addApplet(name, args, appletGeometry);
}
//pos must be relative to the containment already. use mapfromscene.
//what we're trying to do here for panels is make the applet go to the requested position,
//or somewhere close to it, and get integrated properly into the containment as if it were created
//there.
void Containment::addApplet(Applet *applet, const QPointF &pos, bool delayInit)
{
if (!delayInit && immutability() != NotImmutable) {
return;
}
if (!applet) {
kDebug() << "adding null applet!?!";
return;
}
Containment *currentContainment = applet->containment();
if (containmentType() == PanelContainment) {
//panels don't want backgrounds, which is important when setting geometry
setBackgroundHints(NoBackground);
}
if (currentContainment && currentContainment != this) {
applet->removeSceneEventFilter(currentContainment);
KConfigGroup oldConfig = applet->config();
currentContainment->d->applets.removeAll(applet);
applet->setParentItem(this);
// now move the old config to the new location
KConfigGroup c = config().group("Applets").group(QString::number(applet->id()));
oldConfig.reparent(&c);
applet->resetConfigurationObject();
} else {
applet->setParentItem(this);
}
d->applets << applet;
connect(applet, SIGNAL(destroyed(QObject*)), this, SLOT(appletDestroyed(QObject*)));
if (pos != QPointF(-1, -1)) {
applet->setPos(pos);
}
if (delayInit) {
if (containmentType() == DesktopContainment) {
applet->installSceneEventFilter(this);
}
} else {
applet->init();
Animator::self()->animateItem(applet, Animator::AppearAnimation);
}
applet->updateConstraints(Plasma::AllConstraints | Plasma::StartupCompletedConstraint);
if (!delayInit) {
applet->flushUpdatedConstraints();
emit configNeedsSaving();
}
emit appletAdded(applet, pos);
}
Applet::List Containment::applets() const
{
return d->applets;
}
void Containment::setScreen(int screen)
{
// screen of -1 means no associated screen.
if (containmentType() == DesktopContainment || containmentType() >= CustomContainment) {
#ifndef Q_OS_WIN
// we want to listen to changes in work area if our screen changes
if (d->screen < 0 && screen > -1) {
connect(KWindowSystem::self(), SIGNAL(workAreaChanged()), this, SLOT(positionToolBox()));
} else if (screen < 0) {
disconnect(KWindowSystem::self(), SIGNAL(workAreaChanged()), this, SLOT(positionToolBox()));
}
#endif
if (screen > -1 && corona()) {
// sanity check to make sure someone else doesn't have this screen already!
Containment* currently = corona()->containmentForScreen(screen);
if (currently && currently != this) {
//kDebug() << "currently is on screen" << currently->screen() << "and is" << currently->name() << (QObject*)currently << (QObject*)this;
currently->setScreen(-1);
}
}
}
//kDebug() << "setting screen to" << screen << "and we are a" << containmentType();
QDesktopWidget *desktop = QApplication::desktop();
int numScreens = desktop->numScreens();
if (screen < -1) {
screen = -1;
}
//kDebug() << "setting screen to " << screen << "and type is" << containmentType();
if (screen < numScreens && screen > -1) {
if (containmentType() == DesktopContainment ||
containmentType() >= CustomContainment) {
resize(desktop->screenGeometry(screen).size());
}
}
int oldScreen = d->screen;
d->screen = screen;
updateConstraints(Plasma::ScreenConstraint);
if (oldScreen != screen) {
emit screenChanged(oldScreen, screen, this);
}
}
int Containment::screen() const
{
return d->screen;
}
QPoint Containment::effectiveScreenPos() const
{
if (d->screen < 0) {
return QPoint();
}
QRect r = QApplication::desktop()->screenGeometry(d->screen);
if (containmentType() == PanelContainment) {
QRectF p = geometry();
switch (d->location) {
case TopEdge:
return QPoint(r.left() + p.x(), r.top());
break;
case BottomEdge:
return QPoint(r.left() + p.x(), r.bottom() - p.height());
break;
case LeftEdge:
return QPoint(r.left(), r.top() + (p.bottom() + INTER_CONTAINMENT_MARGIN));
break;
case RightEdge:
return QPoint(r.right() - p.width(), r.top() + (p.bottom() + INTER_CONTAINMENT_MARGIN));
break;
default:
//FIXME: implement properly for Floating!
return p.topLeft().toPoint();
break;
}
} else {
//NOTE: if we ever support non-origin'd desktop containments
// this assumption here will have to change
return r.topLeft();
}
}
KPluginInfo::List Containment::listContainments(const QString &category,
const QString &parentApp)
{
QString constraint;
if (parentApp.isEmpty()) {
constraint.append("not exist [X-KDE-ParentApp]");
} else {
constraint.append("[X-KDE-ParentApp] == '").append(parentApp).append("'");
}
if (!category.isEmpty()) {
if (!constraint.isEmpty()) {
constraint.append(" and ");
}
constraint.append("[X-KDE-PluginInfo-Category] == '").append(category).append("'");
if (category == "Miscellaneous") {
constraint.append(" or (not exist [X-KDE-PluginInfo-Category] or [X-KDE-PluginInfo-Category] == '')");
}
}
KService::List offers = KServiceTypeTrader::self()->query("Plasma/Containment", constraint);
//kDebug() << "constraint was" << constraint << "which got us" << offers.count() << "matches";
return KPluginInfo::fromServices(offers);
}
KPluginInfo::List Containment::listContainmentsForMimetype(const QString &mimetype)
{
QString constraint = QString("'%1' in MimeTypes").arg(mimetype);
//kDebug() << mimetype << constraint;
KService::List offers = KServiceTypeTrader::self()->query("Plasma/Containment", constraint);
return KPluginInfo::fromServices(offers);
}
void Containment::dropEvent(QGraphicsSceneDragDropEvent *event)
{
//kDebug() << event->mimeData()->text();
QString mimetype(static_cast<Corona*>(scene())->appletMimeType());
if (event->mimeData()->hasFormat(mimetype) && scene()) {
QString plasmoidName;
plasmoidName = event->mimeData()->data(mimetype);
QRectF geom(mapFromScene(event->scenePos()), QSize(0, 0));
addApplet(plasmoidName, QVariantList(), geom);
event->acceptProposedAction();
} else if (KUrl::List::canDecode(event->mimeData())) {
//TODO: collect the mimetypes of available script engines and offer
// to create widgets out of the matching URLs, if any
KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
foreach (const KUrl& url, urls) {
KMimeType::Ptr mime = KMimeType::findByUrl(url);
QString mimeName = mime->name();
QRectF geom(event->scenePos(), QSize(0, 0));
QVariantList args;
args << url.url();
// kDebug() << mimeName;
KPluginInfo::List appletList = Applet::listAppletInfoForMimetype(mimeName);
if (appletList.isEmpty()) {
// no special applet associated with this mimetype, let's
addApplet("icon", args, geom);
} else {
//TODO: should we show a dialog here to choose which plasmoid load if
//!appletList.isEmpty()
addApplet(appletList.first().pluginName(), args, geom);
}
}
event->acceptProposedAction();
}
}
void Containment::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
//FIXME Qt4.4 check to see if this is still necessary to avoid unecessary repaints
// check with QT_FLUSH_PAINT=1 and mouse through applets that accept hover,
// applets that don't and system windows
if (event->spontaneous()) {
Applet::hoverEnterEvent(event);
}
Q_UNUSED(event)
}
void Containment::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
//FIXME Qt4.4 check to see if this is still necessary to avoid unecessary repaints
// check with QT_FLUSH_PAINT=1 and mouse through applets that accept hover,
// applets that don't and system windows
// Applet::hoverLeaveEvent(event);
Q_UNUSED(event)
}
void Containment::keyPressEvent(QKeyEvent *event)
{
kDebug() << "keyPressEvent with" << event->key() << "and hoping and wishing for a" << Qt::Key_Tab;
if (event->key() == Qt::Key_Tab) { // && event->modifiers() == 0) {
kDebug() << "let's give focus to...." << (QObject*)d->applets.first();
if (!d->applets.isEmpty()) {
d->applets.first()->setFocus(Qt::TabFocusReason);
}
}
}
bool Containment::sceneEventFilter(QGraphicsItem *watched, QEvent *event)
{
Applet *applet = qgraphicsitem_cast<Applet*>(watched);
// Otherwise we're watching something we shouldn't be...
//kDebug() << "got sceneEvent";
Q_ASSERT(applet!=0);
if (!d->applets.contains(applet)) {
return false;
}
switch (event->type()) {
case QEvent::GraphicsSceneHoverEnter:
//kDebug() << "got hoverenterEvent" << immutability() << " " << applet->immutability();
if (immutability() == NotImmutable && applet->immutability() == NotImmutable) {
if (d->handles.contains(applet)) {
d->handles[applet]->startFading(AppletHandle::FadeIn);
} else {
//kDebug() << "generated applet handle";
//TODO: there should be a small delay on showing these. they pop up too quickly/easily
// right now
AppletHandle *handle = new AppletHandle(this, applet);
d->handles[applet] = handle;
connect(handle, SIGNAL(disappearDone(AppletHandle*)),
this, SLOT(handleDisappeared(AppletHandle*)));
connect(applet, SIGNAL(geometryChanged()),
handle, SLOT(appletResized()));
}
}
break;
case QEvent::GraphicsSceneHoverLeave:
//kDebug() << "got hoverLeaveEvent";
if (d->handles.contains(applet)) {
QGraphicsSceneHoverEvent *he = static_cast<QGraphicsSceneHoverEvent *>(event);
if (!d->handles[applet]->boundingRect().contains(d->handles[applet]->mapFromScene(he->scenePos()))) {
d->handles[applet]->startFading(AppletHandle::FadeOut);
}
}
default:
break;
}
return false;
}
QVariant Containment::itemChange(GraphicsItemChange change, const QVariant &value)
{
Q_UNUSED(value)
if (isContainment() &&
(change == QGraphicsItem::ItemSceneHasChanged || change == QGraphicsItem::ItemPositionHasChanged) &&
!d->positioning) {
switch (containmentType()) {
case PanelContainment:
d->positionPanel();
break;
default:
d->positionContainment();
break;
}
}
return Applet::itemChange(change, value);
}
QGraphicsWidget * Containment::addToolBoxTool(const QString& toolName, const QString& iconName, const QString& iconText)
{
Plasma::Icon *tool = new Plasma::Icon(this);
tool->setDrawBackground(true);
tool->setIcon(KIcon(iconName));
tool->setText(iconText);
tool->setOrientation(Qt::Horizontal);
QSizeF iconSize = tool->sizeFromIconSize(22);
tool->setMinimumSize(iconSize);
tool->setMaximumSize(iconSize);
tool->resize(tool->size());
d->createToolBox()->addTool(tool, toolName);
return tool;
}
void Containment::enableToolBoxTool(const QString &toolname, bool enable)
{
if (d->toolBox) {
d->toolBox->enableTool(toolname, enable);
}
}
bool Containment::isToolBoxToolEnabled(const QString &toolname) const
{
if (d->toolBox) {
return d->toolBox->isToolEnabled(toolname);
}
return false;
}
void Containment::setToolBoxOpen(bool open)
{
if (open) {
openToolBox();
} else {
closeToolBox();
}
}
void Containment::openToolBox()
{
if (d->toolBox) {
d->toolBox->showToolbox();
}
}
void Containment::closeToolBox()
{
if (d->toolBox) {
d->toolBox->hideToolbox();
}
}
// Private class implementation
void Containment::Private::toggleDesktopImmutability()
{
if (q->corona()) {
if (q->corona()->immutability() == NotImmutable) {
q->corona()->setImmutability(UserImmutable);
} else if (q->corona()->immutability() == UserImmutable) {
q->corona()->setImmutability(NotImmutable);
}
} else {
if (q->immutability() == NotImmutable) {
q->setImmutability(UserImmutable);
} else if (q->immutability() == UserImmutable) {
q->setImmutability(NotImmutable);
}
}
setLockToolText();
}
void Containment::Private::zoomIn()
{
emit q->zoomRequested(q, Plasma::ZoomIn);
}
void Containment::Private::zoomOut()
{
emit q->zoomRequested(q, Plasma::ZoomOut);
}
Toolbox* Containment::Private::createToolBox()
{
if (!toolBox) {
switch (type) {
case PanelContainment:
toolBox = new PanelToolbox(q);
break;
//defaults to DesktopContainment right now
default:
toolBox = new DesktopToolbox(q);
break;
}
positionToolBox();
}
return toolBox;
}
void Containment::Private::positionToolBox()
{
if (!toolBox) {
return;
}
QRectF r;
if (screen < 0) {
r = q->geometry();
} else {
QDesktopWidget *desktop = QApplication::desktop();
r = desktop->availableGeometry(screen);
}
toolBox->setPos(QPointF(r.right(), r.y()));
}
void Containment::Private::triggerShowAddWidgets()
{
emit q->showAddWidgetsInterface(QPointF());
}
void Containment::Private::handleDisappeared(AppletHandle *handle)
{
handles.remove(handle->applet());
handle->deleteLater();
}
void Containment::Private::setLockToolText()
{
if (!toolBox) {
return;
}
Icon *icon = dynamic_cast<Plasma::Icon*>(toolBox->tool("lockWidgets"));
if (icon) {
// we know it's an icon becase we made it
icon->setText(q->immutability() != NotImmutable ? i18n("Unlock Widgets") :
i18n("Lock Widgets"));
QSizeF iconSize = icon->sizeFromIconSize(22);
icon->setMinimumSize(iconSize);
icon->setMaximumSize(iconSize);
icon->resize(icon->size());
}
}
void Containment::Private::containmentConstraintsUpdated(Plasma::Constraints constraints)
{
if (!q->isContainment()) {
return;
}
//kDebug() << "got containmentConstraintsUpdated" << constraints << (QObject*)toolBox;
if (constraints & Plasma::ImmutableConstraint) {
setLockToolText();
// tell the applets too
foreach (Applet *a, applets) {
a->constraintsUpdated(ImmutableConstraint);
}
}
if ((constraints & Plasma::SizeConstraint || constraints & Plasma::ScreenConstraint) &&
toolBox) {
//The placement assumes that the geometry width/height is no more than the screen
if (type == PanelContainment) {
if (q->formFactor() == Vertical) {
toolBox->setOrientation(Qt::Vertical);
toolBox->setPos(q->geometry().width()/2 - toolBox->boundingRect().width()/2, q->geometry().height());
//defaulting to Horizontal right now
} else {
toolBox->setOrientation(Qt::Horizontal);
toolBox->setPos(q->geometry().width(), q->geometry().height()/2 - toolBox->boundingRect().height()/2);
}
} else {
toolBox->setPos(q->geometry().right() - qAbs(toolBox->boundingRect().width()), 0);
}
toolBox->enableTool("addwidgets", q->immutability() == NotImmutable);
}
if (constraints & Plasma::FormFactorConstraint && toolBox) {
if (q->formFactor() == Vertical) {
toolBox->setOrientation(Qt::Vertical);
//defaults to horizontal
} else {
toolBox->setOrientation(Qt::Horizontal);
}
}
if (constraints & Plasma::SizeConstraint) {
switch (q->containmentType()) {
case PanelContainment:
positionPanel();
break;
default:
positionContainment();
break;
}
}
}
void Containment::Private::destroyApplet()
{
QAction *action = qobject_cast<QAction*>(q->sender());
if (!action) {
return;
}
Applet *applet = qobject_cast<Applet*>(action->data().value<QObject*>());
Animator::self()->animateItem(applet, Animator::DisappearAnimation);
}
Applet* Containment::Private::addApplet(const QString& name, const QVariantList& args,
const QRectF& appletGeometry, uint id, bool delayInit)
{
if (!delayInit && q->immutability() != NotImmutable) {
kDebug() << "addApplet for" << name << "requested, but we're currently immutable!";
return 0;
}
QGraphicsView *v = q->view();
if (v) {
v->setCursor(Qt::BusyCursor);
}
Applet* applet = Applet::load(name, id, args);
if (v) {
v->unsetCursor();
}
if (!applet) {
kDebug() << "Applet" << name << "could not be loaded.";
applet = new Applet;
}
//kDebug() << applet->name() << "sizehint:" << applet->sizeHint() << "geometry:" << applet->geometry();
connect(applet, SIGNAL(configNeedsSaving()), q, SIGNAL(configNeedsSaving()));
connect(applet, SIGNAL(launchActivated()), q, SIGNAL(launchActivated()));
q->addApplet(applet, appletGeometry.topLeft(), delayInit);
return applet;
}
bool Containment::Private::regionIsEmpty(const QRectF &region, Applet *ignoredApplet) const
{
foreach (Applet *applet, applets) {
if (applet != ignoredApplet && applet->geometry().intersects(region)) {
return false;
}
}
return true;
}
void Containment::Private::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);
applets.removeAll(applet);
emit q->appletRemoved(applet);
emit q->configNeedsSaving();
}
void Containment::Private::appletAnimationComplete(QGraphicsItem *item, Plasma::Animator::Animation anim)
{
if (anim == Animator::DisappearAnimation) {
QGraphicsItem *parent = item->parentItem();
while (parent) {
if (parent == q) {
Applet *applet = qgraphicsitem_cast<Applet*>(item);
if (applet) {
applet->destroy();
}
break;
}
parent = parent->parentItem();
}
} else if (anim == Animator::AppearAnimation) {
if (q->containmentType() == DesktopContainment &&
item->parentItem() == q &&
qgraphicsitem_cast<Applet*>(item)) {
item->installSceneEventFilter(q);
}
}
}
void Containment::Private::positionContainment()
{
Corona *c = q->corona();
if (!c) {
return;
}
QList<Containment*> containments = c->containments();
QMutableListIterator<Containment*> it(containments);
while (it.hasNext()) {
Containment *containment = it.next();
if (containment == q ||
containment->containmentType() == PanelContainment) {
// weed out all containments we don't care about at all
// e.g. Panels and ourself
it.remove();
continue;
}
if (q->collidesWithItem(containment)) {
break;
}
}
if (!it.hasNext()) {
// we made it all the way through the list, we have no
// collisions
return;
}
// we need to find how many screens are to our top and left
// to calculate the proper offsets for the margins.
int width = 0;
int height = 0;
QDesktopWidget *desktop = QApplication::desktop();
int numScreens = desktop->numScreens();
for (int i = 0; i < numScreens; ++i) {
QRect otherScreen = desktop->screenGeometry(i);
if (width < otherScreen.width()) {
width = otherScreen.width();
}
if (height < otherScreen.height()) {
height = otherScreen.height();
}
}
//this magic number (4) is the number of columns to try before going to the next row
width = (width + INTER_CONTAINMENT_MARGIN) * 4;
height += INTER_CONTAINMENT_MARGIN;
// a mildly naive "find the first slot" approach
QRectF r = q->boundingRect();
QPointF topLeft(0, 0);
q->setPos(topLeft);
positioning = true;
while (true) {
it.toFront();
while (it.hasNext()) {
Containment *containment = it.next();
if (q->collidesWithItem(containment)) {
break;
}
QPointF pos = containment->pos();
if (pos.x() <= topLeft.x() && pos.y() <= topLeft.y()) {
// we don't colid with this containment, and it's above
// and to the left of us, so let's not bother checking
// it again if we go through this loop again
it.remove();
}
}
if (!it.hasNext()) {
// success! no collisions!
break;
}
if (topLeft.x() + (r.width() * 2) + INTER_CONTAINMENT_MARGIN > width) {
// we ran out of width room, try another row
topLeft = QPoint(0, topLeft.y() + height);
} else {
topLeft.setX(topLeft.x() + r.width() + INTER_CONTAINMENT_MARGIN);
}
kDebug() << "trying at" << topLeft;
q->setPos(topLeft);
//kDebug() << collidingItems().count() << collidingItems()[0] << (QGraphicsItem*)this;
}
positioning = false;
}
void Containment::Private::positionPanel(bool force)
{
if (!q->scene()) {
kDebug() << "no scene yet";
return;
}
// we position panels in negative coordinates, and stack all horizontal
// and all vertical panels with each other.
const QPointF p = q->pos();
if (!force &&
p.y() + q->size().height() < -INTER_CONTAINMENT_MARGIN &&
q->scene()->collidingItems(q).isEmpty()) {
// already positioned and not running into any other panels
return;
}
//TODO: research how non-Horizontal, non-Vertical (e.g. Planar) panels behave here
bool horiz = q->formFactor() == Plasma::Horizontal;
qreal bottom = horiz ? 0 : VERTICAL_STACKING_OFFSET;
qreal lastHeight = 0;
// this should be ok for small numbers of panels, but we ever end
// up managing hundreds of them, this simplistic alogrithm will
// likely be too slow.
foreach (const Containment* other, q->corona()->containments()) {
if (other == q ||
other->containmentType() != PanelContainment ||
horiz != (other->formFactor() == Plasma::Horizontal)) {
// only line up with panels of the same orientation
continue;
}
if (horiz) {
qreal y = other->pos().y();
if (y < bottom) {
lastHeight = other->size().height();
bottom = y;
}
} else {
qreal width = other->size().width();
qreal x = other->pos().x() + width;
if (x > bottom) {
lastHeight = width;
bottom = x + lastHeight;
}
}
}
kDebug() << "positioning" << (horiz ? "" : "non-") << "horizontal panel; forced?" << force;
// give a space equal to the height again of the last item so there is
// room to grow.
QPointF newPos;
if (horiz) {
bottom -= lastHeight + INTER_CONTAINMENT_MARGIN;
//TODO: fix x position for non-flush-left panels
kDebug() << "moved to" << QPointF(0, bottom - q->size().height());
newPos = QPointF(0, bottom - q->size().height());
} else {
bottom += lastHeight + INTER_CONTAINMENT_MARGIN;
//TODO: fix y position for non-flush-top panels
kDebug() << "moved to" << QPointF(bottom + q->size().width(), -INTER_CONTAINMENT_MARGIN - q->size().height());
newPos = QPointF(bottom + q->size().width(), -INTER_CONTAINMENT_MARGIN - q->size().height());
}
positioning = true;
if (p != newPos) {
q->setPos(newPos);
emit q->geometryChanged();
}
positioning = false;
}
} // Plasma namespace
#include "containment.moc"
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