f98593d3fb
A new QML item "ThumbnailItem" is registered to the TabBox. The C++ implementation finds the EffectWindow of the TabBox and adds itself to the EffectWindow. While rendering the EffectWindow the information for all registered ThumbnailItems are extracted and the thumbnail is rendered on top of the EffectWindow. This has obvious limitations like you cannot put other QML items on top of the thumbnail. Nevertheless it works well enough to be a possible replacement for e.g. BoxSwitch effect. When compositing is disabled an icon is rendered instead of the Thumbnail. One TabBox Layout inspired by BoxSwitch Effect is added. For the KCM small pre-rendered items are used. REVIEW: 103039
113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2011 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "thumbnailitem.h"
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// KWin
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#include "client.h"
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#include "effects.h"
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#include "workspace.h"
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// Qt
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#include <QtDeclarative/QDeclarativeContext>
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#include <QtDeclarative/QDeclarativeEngine>
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#include <QtDeclarative/QDeclarativeView>
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// KDE
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#include <KDE/KDebug>
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namespace KWin
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{
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ThumbnailItem::ThumbnailItem(QDeclarativeItem* parent)
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: QDeclarativeItem(parent)
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, m_wId(0)
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, m_parent(QWeakPointer<EffectWindowImpl>())
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{
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setFlags(flags() & ~QGraphicsItem::ItemHasNoContents);
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if (effects) {
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connect(effects, SIGNAL(windowAdded(EffectWindow*)), SLOT(effectWindowAdded()));
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}
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QTimer::singleShot(0, this, SLOT(init()));
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}
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ThumbnailItem::~ThumbnailItem()
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{
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}
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void ThumbnailItem::init()
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{
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findParentEffectWindow();
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if (!m_parent.isNull()) {
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m_parent.data()->registerThumbnail(this);
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}
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}
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void ThumbnailItem::findParentEffectWindow()
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{
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if (effects) {
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QDeclarativeContext *ctx = QDeclarativeEngine::contextForObject(this);
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if (!ctx) {
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kDebug(1212) << "No Context";
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return;
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}
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const QVariant variant = ctx->engine()->rootContext()->contextProperty("viewId");
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if (!variant.isValid()) {
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kDebug(1212) << "Required context property 'viewId' not found";
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return;
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}
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if (EffectWindowImpl *w = static_cast<EffectWindowImpl*>(effects->findWindow(variant.value<qulonglong>()))) {
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m_parent = QWeakPointer<EffectWindowImpl>(w);
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}
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}
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}
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void ThumbnailItem::setWId(qulonglong wId)
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{
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m_wId = wId;
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emit wIdChanged(wId);
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}
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void ThumbnailItem::effectWindowAdded()
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{
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// the window might be added before the EffectWindow is created
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// by using this slot we can register the thumbnail when it is finally created
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if (m_parent.isNull()) {
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findParentEffectWindow();
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if (!m_parent.isNull()) {
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m_parent.data()->registerThumbnail(this);
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}
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}
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}
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void ThumbnailItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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if (effects) {
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QDeclarativeItem::paint(painter, option, widget);
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return;
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}
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Client *client = Workspace::self()->findClient(WindowMatchPredicate(m_wId));
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if (!client) {
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QDeclarativeItem::paint(painter, option, widget);
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return;
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}
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QPixmap pixmap = client->icon(boundingRect().size().toSize());
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const QSize size(boundingRect().size().toSize() - pixmap.size());
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painter->drawPixmap(boundingRect().adjusted(size.width()/2.0, size.height()/2.0, -size.width()/2.0, -size.height()/2.0).toRect(),
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pixmap);
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}
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} // namespace KWin
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