104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
/* This file is part of Clementine.
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Clementine 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 3 of the License, or
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(at your option) any later version.
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Clementine 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 Clementine. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "widgetfadehelper.h"
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#include <QPainter>
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#include <QTimeLine>
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#include <QtDebug>
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// Exported by QtGui
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void qt_blurImage(QPainter *p, QImage &blurImage, qreal radius, bool quality, bool alphaOnly, int transposed = 0);
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WidgetFadeHelper::WidgetFadeHelper(QWidget* parent, int msec)
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: QWidget(parent),
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parent_(parent),
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blur_timeline_(new QTimeLine(msec, this)),
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fade_timeline_(new QTimeLine(msec, this))
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{
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setAttribute(Qt::WA_TransparentForMouseEvents);
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connect(blur_timeline_, SIGNAL(valueChanged(qreal)), SLOT(update()));
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connect(fade_timeline_, SIGNAL(valueChanged(qreal)), SLOT(update()));
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connect(fade_timeline_, SIGNAL(finished()), SLOT(FadeFinished()));
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hide();
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}
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void WidgetFadeHelper::StartBlur() {
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// Take a "screenshot" of the window
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original_pixmap_ = QPixmap::grabWidget(parent_);
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QImage original_image = original_pixmap_.toImage();
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// Blur it
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QImage blurred(original_image.size(), QImage::Format_ARGB32_Premultiplied);
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blurred.fill(Qt::transparent);
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QPainter blur_painter(&blurred);
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qt_blurImage(&blur_painter, original_image, 10.0, true, false);
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blur_painter.end();
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blurred_pixmap_ = QPixmap::fromImage(blurred);
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// Cover the parent
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resize(parent_->size());
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raise();
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show();
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// Start the timeline
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blur_timeline_->stop();
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blur_timeline_->start();
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}
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void WidgetFadeHelper::StartFade() {
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if (blur_timeline_->state() == QTimeLine::Running) {
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// Blur timeline is still running, so we need render the current state
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// into a new pixmap.
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QPixmap pixmap(original_pixmap_);
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QPainter painter(&pixmap);
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painter.setOpacity(blur_timeline_->currentValue());
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painter.drawPixmap(0, 0, blurred_pixmap_);
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painter.end();
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blurred_pixmap_ = pixmap;
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}
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blur_timeline_->stop();
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original_pixmap_ = QPixmap();
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// Start the timeline
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fade_timeline_->stop();
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fade_timeline_->start();
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}
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void WidgetFadeHelper::paintEvent(QPaintEvent* ) {
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QPainter p(this);
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if (fade_timeline_->state() != QTimeLine::Running) {
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// We're fading in the blur
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p.setOpacity(blur_timeline_->currentValue());
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} else {
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// Fading out the blur into the new image
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p.setOpacity(1.0 - fade_timeline_->currentValue());
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}
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p.drawPixmap(0, 0, blurred_pixmap_);
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}
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void WidgetFadeHelper::FadeFinished() {
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hide();
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original_pixmap_ = QPixmap();
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blurred_pixmap_ = QPixmap();
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}
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