151 lines
4.5 KiB
C++
151 lines
4.5 KiB
C++
/*
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* Copyright 2009 Marco Martin <notmart@gmail.com>
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*
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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 Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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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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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "focusindicator_p.h"
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#include <QGraphicsSceneResizeEvent>
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#include <plasma/theme.h>
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#include <plasma/framesvg.h>
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#include <plasma/animator.h>
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namespace Plasma
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{
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FocusIndicator::FocusIndicator(QGraphicsWidget *parent, QString widget)
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: QGraphicsWidget(parent),
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m_parent(parent),
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m_background(0),
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m_prefix("hover")
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{
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setFlag(QGraphicsItem::ItemStacksBehindParent);
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setAcceptsHoverEvents(true);
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m_background = new Plasma::FrameSvg(this);
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m_background->setImagePath(widget);
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m_background->setElementPrefix("hover");
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m_background->setCacheAllRenderedFrames(true);
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m_fade = Animator::create(Animator::FadeAnimation, this);
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m_fade->setWidgetToAnimate(this);
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m_fade->setProperty("startOpacity", 0.0);
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m_fade->setProperty("targetOpacity", 1.0);
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parent->installEventFilter(this);
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connect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()), SLOT(syncGeometry()));
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syncGeometry();
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}
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FocusIndicator::~FocusIndicator()
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{
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delete m_fade;
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}
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void FocusIndicator::setCustomGeometry(const QRectF &geometry)
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{
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m_customGeometry = geometry;
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syncGeometry();
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}
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void FocusIndicator::setCustomPrefix(const QString &prefix)
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{
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m_customPrefix = prefix;
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}
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bool FocusIndicator::eventFilter(QObject *watched, QEvent *event)
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{
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if (static_cast<QGraphicsWidget *>(watched) != m_parent) {
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return false;
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}
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if (!m_parent->hasFocus() && event->type() == QEvent::GraphicsSceneHoverEnter) {
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m_background->setElementPrefix("hover");
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m_prefix = m_customPrefix + "hover";
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m_fade->setProperty("startOpacity", 0.0);
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m_fade->setProperty("targetOpacity", 1.0);
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syncGeometry();
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m_fade->start();
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} else if (!m_parent->hasFocus() && event->type() == QEvent::GraphicsSceneHoverLeave) {
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m_fade->setProperty("startOpacity", 1.0);
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m_fade->setProperty("targetOpacity", 0.0);
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m_fade->start();
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} else if (event->type() == QEvent::GraphicsSceneResize) {
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syncGeometry();
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} else if (event->type() == QEvent::FocusIn) {
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m_background->setElementPrefix("focus");
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m_prefix = m_customPrefix + "focus";
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m_fade->setProperty("startOpacity", 0.0);
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m_fade->setProperty("targetOpacity", 1.0);
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syncGeometry();
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m_fade->start();
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} else if (!m_parent->isUnderMouse() && event->type() == QEvent::FocusOut) {
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m_fade->setProperty("startOpacity", 1.0);
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m_fade->setProperty("targetOpacity", 0.0);
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m_fade->start();
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}
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return false;
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}
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void FocusIndicator::resizeEvent(QGraphicsSceneResizeEvent *event)
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{
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m_background->setElementPrefix("hover");
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m_background->resizeFrame(event->newSize());
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m_background->setElementPrefix("focus");
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m_background->resizeFrame(event->newSize());
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}
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void FocusIndicator::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(option)
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Q_UNUSED(widget)
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if (m_background->hasElementPrefix(m_prefix)) {
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m_background->paintFrame(painter);
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} else {
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m_background->paint(painter, QPoint(0,0), m_prefix);
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}
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}
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void FocusIndicator::syncGeometry()
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{
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QRectF geom;
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if (!m_customGeometry.isNull()) {
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geom = m_customGeometry;
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} else {
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geom = m_parent->boundingRect();
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}
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if (m_background->hasElementPrefix(m_prefix)) {
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qreal left, top, right, bottom;
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m_background->getMargins(left, top, right, bottom);
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setGeometry(QRectF(geom.topLeft() + QPointF(-left, -top), geom.size() + QSize(left+right, top+bottom)));
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} else {
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QRectF elementRect = m_background->elementRect(m_prefix);
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elementRect.moveCenter(geom.center());
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setGeometry(elementRect);
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}
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}
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}
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#include <focusindicator_p.moc>
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