183 lines
5.7 KiB
C++
183 lines
5.7 KiB
C++
/***************************************************************************
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* Copyright 2009 by Alessandro Diaferia <alediaferia@gmail.com> *
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* Copyright 2009 by 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 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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* *
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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 General Public License *
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* 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 "itembackground.h"
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#include <QPainter>
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#include <QStyleOptionGraphicsItem>
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#include <kdebug.h>
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#include <plasma/framesvg.h>
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#include <plasma/animator.h>
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#include <plasma/theme.h>
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namespace Plasma
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{
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class ItemBackgroundPrivate
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{
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public:
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ItemBackgroundPrivate()
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{}
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Plasma::FrameSvg *frameSvg;
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QRectF oldGeometry;
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QRectF newGeometry;
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int animId;
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qreal opacity;
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bool fading;
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bool fadeIn;
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bool immediate;
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};
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ItemBackground::ItemBackground(QGraphicsWidget *parent)
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: QGraphicsWidget(parent),
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d(new ItemBackgroundPrivate)
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{
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d->frameSvg = new Plasma::FrameSvg(this);
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d->animId = 0;
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d->opacity = 1;
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d->fading = false;
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d->fadeIn = false;
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d->immediate = false;
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setContentsMargins(0, 0, 0, 0);
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d->frameSvg->setImagePath("widgets/viewitem");
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d->frameSvg->setEnabledBorders(Plasma::FrameSvg::AllBorders);
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d->frameSvg->setCacheAllRenderedFrames(true);
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d->frameSvg->setElementPrefix("hover");
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setAcceptedMouseButtons(0);
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setZValue(-800);
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}
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ItemBackground::~ItemBackground()
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{
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delete d;
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}
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void ItemBackground::setTarget(const QRectF &newGeometry)
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{
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qreal left, top, right, bottom;
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d->frameSvg->getMargins(left, top, right, bottom);
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d->oldGeometry = geometry();
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d->newGeometry = newGeometry.adjusted(-left, -top, right, bottom);
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if (!isVisible()) {
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setGeometry(d->newGeometry);
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return;
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}
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QGraphicsWidget *pw = parentWidget();
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if (pw) {
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d->newGeometry = d->newGeometry.intersected(QRectF(QPointF(0,0), pw->size()));
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}
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if (d->animId != 0) {
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Plasma::Animator::self()->stopCustomAnimation(d->animId);
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}
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d->fading = false;
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d->opacity = 1;
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d->animId = Plasma::Animator::self()->customAnimation(
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15, 250, Plasma::Animator::EaseInOutCurve, this, "animationUpdate");
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}
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void ItemBackground::setTargetItem(QGraphicsItem *target)
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{
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QRectF rect = target->boundingRect();
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rect.moveTopLeft(target->pos());
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setTarget(rect);
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}
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QVariant ItemBackground::itemChange(GraphicsItemChange change, const QVariant &value)
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{
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if (d->immediate) {
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return value;
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}
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if (change == ItemVisibleChange) {
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bool visible = value.toBool();
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bool retVisible = visible;
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if (visible == isVisible() || d->animId == 0) {
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retVisible = true;
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}
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d->fading = true;
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d->fadeIn = visible;
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if (d->animId != 0) {
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Plasma::Animator::self()->stopCustomAnimation(d->animId);
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}
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d->animId = Plasma::Animator::self()->customAnimation(
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10, 250, Plasma::Animator::EaseInCurve, this, "animationUpdate");
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return retVisible;
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}
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return value;
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}
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void ItemBackground::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(widget)
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if (d->frameSvg->frameSize() != option->rect.size()) {
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d->frameSvg->resizeFrame(option->rect.size());
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}
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if (qFuzzyCompare(d->opacity, (qreal)1.0)) {
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d->frameSvg->paintFrame(painter, option->rect.topLeft());
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} else if (qFuzzyCompare(d->opacity+1, (qreal)1.0)) {
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return;
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} else {
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QPixmap framePix = d->frameSvg->framePixmap();
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QPainter bufferPainter(&framePix);
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bufferPainter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
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bufferPainter.fillRect(framePix.rect(), QColor(0, 0, 0, 255 * d->opacity));
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bufferPainter.end();
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painter->drawPixmap(framePix.rect(), framePix, framePix.rect());
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}
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}
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void ItemBackground::animationUpdate(qreal progress)
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{
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if (progress == 1) {
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d->animId = 0;
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}
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if (d->fading) {
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d->opacity = d->fadeIn?progress:1-progress;
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if (!d->fadeIn && qFuzzyCompare(d->opacity+1, (qreal)1.0)) {
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d->immediate = true;
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hide();
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d->immediate = false;
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}
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} else {
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setGeometry(d->oldGeometry.x() + (d->newGeometry.x() - d->oldGeometry.x()) * progress,
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d->oldGeometry.y() + (d->newGeometry.y() - d->oldGeometry.y()) * progress,
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d->oldGeometry.width() + (d->newGeometry.width() - d->oldGeometry.width()) * progress,
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d->oldGeometry.height() + (d->newGeometry.height() - d->oldGeometry.height()) * progress);
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}
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update();
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}
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}
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