kwin/thumbnailitem.cpp

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2011 Martin Gräßlin <mgraesslin@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, 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 General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "thumbnailitem.h"
// KWin
#include "client.h"
#include "effects.h"
#include "workspace.h"
// Qt
#include <QtDeclarative/QDeclarativeContext>
#include <QtDeclarative/QDeclarativeEngine>
#include <QtDeclarative/QDeclarativeView>
// KDE
#include <KDE/KDebug>
namespace KWin
{
ThumbnailItem::ThumbnailItem(QDeclarativeItem* parent)
: QDeclarativeItem(parent)
, m_wId(0)
, m_clip(true)
, m_parent(QWeakPointer<EffectWindowImpl>())
{
setFlags(flags() & ~QGraphicsItem::ItemHasNoContents);
if (effects) {
connect(effects, SIGNAL(windowAdded(EffectWindow*)), SLOT(effectWindowAdded()));
}
QTimer::singleShot(0, this, SLOT(init()));
}
ThumbnailItem::~ThumbnailItem()
{
}
void ThumbnailItem::init()
{
findParentEffectWindow();
if (!m_parent.isNull()) {
m_parent.data()->registerThumbnail(this);
}
}
void ThumbnailItem::findParentEffectWindow()
{
if (effects) {
QDeclarativeContext *ctx = QDeclarativeEngine::contextForObject(this);
if (!ctx) {
kDebug(1212) << "No Context";
return;
}
const QVariant variant = ctx->engine()->rootContext()->contextProperty("viewId");
if (!variant.isValid()) {
kDebug(1212) << "Required context property 'viewId' not found";
return;
}
if (EffectWindowImpl *w = static_cast<EffectWindowImpl*>(effects->findWindow(variant.value<qulonglong>()))) {
m_parent = QWeakPointer<EffectWindowImpl>(w);
}
}
}
void ThumbnailItem::setWId(qulonglong wId)
{
m_wId = wId;
emit wIdChanged(wId);
}
void ThumbnailItem::setClip(bool clip)
{
m_clip = clip;
emit clipChanged(clip);
}
void ThumbnailItem::effectWindowAdded()
{
// the window might be added before the EffectWindow is created
// by using this slot we can register the thumbnail when it is finally created
if (m_parent.isNull()) {
findParentEffectWindow();
if (!m_parent.isNull()) {
m_parent.data()->registerThumbnail(this);
}
}
}
void ThumbnailItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
if (effects) {
QDeclarativeItem::paint(painter, option, widget);
return;
}
Client *client = Workspace::self()->findClient(WindowMatchPredicate(m_wId));
if (!client) {
QDeclarativeItem::paint(painter, option, widget);
return;
}
QPixmap pixmap = client->icon(boundingRect().size().toSize());
const QSize size(boundingRect().size().toSize() - pixmap.size());
painter->drawPixmap(boundingRect().adjusted(size.width()/2.0, size.height()/2.0, -size.width()/2.0, -size.height()/2.0).toRect(),
pixmap);
}
} // namespace KWin