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/*
* Cantata
*
* Copyright (c) 2011-2022 Craig Drummond <craig.p.drummond@gmail.com>
*
* ----
*
* 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "ratingwidget.h"
#include "mpd-interface/song.h"
#include "support/icon.h"
#include <QApplication>
#include <QFontMetrics>
#include <QLabel>
#include <QMouseEvent>
#include <QPainter>
#include <QSvgRenderer>
static bool allowHalfStars = true;// TODO: Make this configurable???
static const int constNumStars = Song::Rating_Max / Song::Rating_Step;
static const int constBorder = 2;
RatingPainter::RatingPainter(int s)
: starSz(s), pixmapSize((starSz * constNumStars) + (constBorder * (constNumStars - 1)), starSz), col(QApplication::palette().text().color())
{
}
void RatingPainter::paint(QPainter* p, const QRect& r, int rating)
{
if (rating < 0 || rating > Song::Rating_Max) {
return;
}
double pixelRatio = p && p->device() ? p->device()->DEVICE_PIXEL_RATIO() : 1.0;
if (!isNull() && !Utils::equal(pixelRatio, pixmaps[0].DEVICE_PIXEL_RATIO())) {
pixmaps[0] = QPixmap();
}
if (isNull()) {
QSvgRenderer renderer;
QFile f(":stars.svg");
QByteArray bytes;
if (f.open(QIODevice::ReadOnly)) {
bytes = f.readAll();
}
if (!bytes.isEmpty()) {
bytes.replace("#000", col.name().toLatin1());
if (pixelRatio > 1.25) {
bytes.replace("stroke-width=\"3\"", "stroke-width=\"6\"");
}
}
renderer.load(bytes);
int pixSize = starSz * pixelRatio;
for (int p = 0; p < 2; ++p) {
pixmaps[p] = QPixmap(pixSize, pixSize);
pixmaps[p].fill(Qt::transparent);
QPainter painter(&(pixmaps[p]));
renderer.render(&painter, 1 == p ? "on" : "off", QRectF(0, 0, pixSize, pixSize));
}
pixmaps[2] = QPixmap(pixSize, pixSize);
pixmaps[2].fill(Qt::transparent);
QPainter painter(&(pixmaps[2]));
int halfSz = (pixSize / 2.0) + 0.5;
painter.drawPixmap(0, 0, pixmaps[1], 0, 0, halfSz, pixSize);
painter.drawPixmap(halfSz, 0, pixmaps[0], halfSz, 0, pixSize - halfSz, pixSize);
painter.end();
for (int p = 0; p < 3; ++p) {
pixmaps[p].setDevicePixelRatio(pixelRatio);
}
}
int fullStars = rating / Song::Rating_Step;
bool half = allowHalfStars && rating % Song::Rating_Step;
QSize layoutSize = pixmaps[0].size() / pixmaps[0].DEVICE_PIXEL_RATIO();
QRect pr(r.x(), r.y() + (r.height() - layoutSize.width()) / 2, layoutSize.width(), layoutSize.height());
for (int i = 0; i < constNumStars; ++i) {
p->drawPixmap(pr, pixmaps[half && i == fullStars ? 2 : i < fullStars ? 1
: 0]);
pr.setX(pr.x() + layoutSize.width() + constBorder);
}
}
void RatingPainter::setColor(const QColor& c)
{
if (col != c) {
col = c;
if (!isNull()) {
pixmaps[0] = QPixmap();
}
}
}
RatingWidget::RatingWidget(QWidget* parent)
: QWidget(parent), rp(Icon::stdSize(QFontMetricsF(QApplication::font()).height() * 0.9)), val(0), hoverVal(-1), showZeroForNull(false)
{
setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
setMouseTracking(true);
setFixedSize(rp.size());
}
void RatingWidget::setValue(int v)
{
val = v;
update();
}
void RatingWidget::setColor(const QColor& c)
{
if (c != rp.color()) {
rp.setColor(c);
if (!rp.isNull()) {
update();
}
}
}
void RatingWidget::paintEvent(QPaintEvent* e)
{
Q_UNUSED(e)
QPainter p(this);
if (!isEnabled()) {
p.setOpacity(0.5);
}
rp.paint(&p, rect(), -1 == hoverVal ? (showZeroForNull && val == Song::Rating_Null ? 0 : val) : hoverVal);
}
void RatingWidget::mousePressEvent(QMouseEvent* e)
{
Q_UNUSED(e)
val = valueForPos(e->pos());
emit valueChanged(val);
}
void RatingWidget::mouseMoveEvent(QMouseEvent* e)
{
Q_UNUSED(e)
hoverVal = valueForPos(e->pos());
update();
}
void RatingWidget::leaveEvent(QEvent* e)
{
Q_UNUSED(e)
hoverVal = -1;
update();
}
QRect RatingWidget::contentsRect() const
{
const QRect& r = rect();
const int width = rp.size().width();
const int x = r.x() + (r.width() - width) / 2;
return QRect(x, r.y(), width, r.height());
}
int RatingWidget::valueForPos(const QPoint& pos) const
{
const QRect contents = contentsRect();
const double raw = double(pos.x() - contents.left()) / contents.width();
if (!allowHalfStars) {
int v = (raw * Song::Rating_Max);
if (v % Song::Rating_Step) {
v++;
}
return v;
}
return (raw * Song::Rating_Max) + 0.5;
}
#include "moc_ratingwidget.cpp"
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