Clementine-audio-player-Mac.../src/widgets/freespacebar.cpp

208 lines
6.7 KiB
C++

/* This file is part of Clementine.
Clementine 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 3 of the License, or
(at your option) any later version.
Clementine 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 Clementine. If not, see <http://www.gnu.org/licenses/>.
*/
#include "freespacebar.h"
#include "core/utilities.h"
#include <QLinearGradient>
#include <QPainter>
const int FreeSpaceBar::kBarHeight = 20;
const int FreeSpaceBar::kBarBorderRadius = 8;
const int FreeSpaceBar::kMarkerSpacing = 32;
const int FreeSpaceBar::kLabelBoxSize = 12;
const int FreeSpaceBar::kLabelBoxPadding = 4;
const int FreeSpaceBar::kLabelSpacing = 16;
const QRgb FreeSpaceBar::kColorBg1 = qRgb(214, 207, 200);
const QRgb FreeSpaceBar::kColorBg2 = qRgb(234, 226, 218);
const QRgb FreeSpaceBar::kColorAdd1 = qRgb(136, 180, 229);
const QRgb FreeSpaceBar::kColorAdd2 = qRgb(72, 146, 229);
const QRgb FreeSpaceBar::kColorBar1 = qRgb(250, 148, 76);
const QRgb FreeSpaceBar::kColorBar2 = qRgb(214, 102, 24);
const QRgb FreeSpaceBar::kColorBorder = qRgb(174, 168, 162);
FreeSpaceBar::FreeSpaceBar(QWidget *parent)
: QWidget(parent),
free_(100),
additional_(0),
total_(100),
free_text_(tr("Available")),
additional_text_(tr("New songs")),
used_text_(tr("Used"))
{
setMinimumHeight(sizeHint().height());
}
QSize FreeSpaceBar::sizeHint() const {
return QSize(150, kBarHeight + kLabelBoxPadding + fontMetrics().height());
}
void FreeSpaceBar::paintEvent(QPaintEvent*) {
// Geometry
QRect bar_rect(rect());
bar_rect.setHeight(kBarHeight);
QRect reflection_rect(bar_rect);
reflection_rect.moveTop(reflection_rect.bottom());
QRect labels_rect(rect());
labels_rect.setTop(labels_rect.top() + kBarHeight + kLabelBoxPadding);
// Draw the reflection
// Create the reflected pixmap
QImage reflection(reflection_rect.size(), QImage::Format_ARGB32_Premultiplied);
reflection.fill(palette().color(QPalette::Background).rgba());
QPainter p(&reflection);
// Set up the transformation
QTransform transform;
transform.scale(1.0, -1.0);
transform.translate(0.0, -reflection.height());
p.setTransform(transform);
// Draw the bar
DrawBar(&p, QRect(QPoint(0, 0), reflection.size()));
// Make it fade out towards the bottom
QLinearGradient fade_gradient(reflection.rect().topLeft(), reflection.rect().bottomLeft());
fade_gradient.setColorAt(0.0, QColor(0, 0, 0, 0));
fade_gradient.setColorAt(1.0, QColor(0, 0, 0, 128));
p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
p.fillRect(reflection.rect(), fade_gradient);
p.end();
// Draw on the widget
p.begin(this);
DrawBar(&p, bar_rect);
p.drawImage(reflection_rect, reflection);
DrawText(&p, labels_rect);
}
void FreeSpaceBar::DrawBar(QPainter* p, const QRect& r) {
p->setRenderHint(QPainter::Antialiasing, true);
p->setRenderHint(QPainter::HighQualityAntialiasing, true);
QRect bar_rect(r);
bar_rect.setWidth(float(bar_rect.width()) * (float(total_ - free_) / total_));
QLinearGradient background_gradient(r.topLeft(), r.bottomLeft());
background_gradient.setColorAt(0, kColorBg1);
background_gradient.setColorAt(1, kColorBg2);
QLinearGradient bar_gradient(bar_rect.topLeft(), bar_rect.bottomLeft());
bar_gradient.setColorAt(0, kColorBar1);
bar_gradient.setColorAt(1, kColorBar2);
// Draw the background
p->setPen(Qt::NoPen);
p->setBrush(background_gradient);
p->drawRoundedRect(r, kBarBorderRadius, kBarBorderRadius);
// Create a path to use for clipping the bars
QPainterPath clip_path;
clip_path.addRoundedRect(r, kBarBorderRadius, kBarBorderRadius);
p->setClipPath(clip_path);
// Draw any additional space
if (additional_) {
QRect additional_rect(bar_rect);
additional_rect.setLeft(bar_rect.right());
additional_rect.setWidth(float(r.width()) * (
float(qMin(free_, additional_)) / total_) + 1);
QLinearGradient additional_gradient(additional_rect.topLeft(), additional_rect.bottomLeft());
additional_gradient.setColorAt(0, kColorAdd1);
additional_gradient.setColorAt(1, kColorAdd2);
p->fillRect(additional_rect, additional_gradient);
}
// Draw the bar foreground
p->fillRect(bar_rect, bar_gradient);
// Draw a border
p->setClipping(false);
p->setPen(kColorBorder);
p->setBrush(Qt::NoBrush);
p->drawRoundedRect(r, kBarBorderRadius, kBarBorderRadius);
// Draw marker lines over the top every few pixels
p->setOpacity(0.35);
p->setRenderHint(QPainter::Antialiasing, false);
p->setPen(QPen(palette().color(QPalette::Light), 1.0));
for (int x = r.left() + kMarkerSpacing ; x < r.right() ; x += kMarkerSpacing) {
p->drawLine(x, r.top() + 2, x, r.bottom() - 2);
}
p->setOpacity(1.0);
}
void FreeSpaceBar::DrawText(QPainter* p, const QRect& r) {
QFont small_font(font());
small_font.setPointSize(small_font.pointSize() - 1);
small_font.setBold(true);
QFontMetrics small_metrics(small_font);
p->setFont(small_font);
// Work out the geometry for the text
QList<Label> labels;
labels << Label(TextForSize(used_text_, total_ - free_), kColorBar1);
if (additional_)
labels << Label(TextForSize(additional_text_, additional_), kColorAdd1);
labels << Label(TextForSize(free_text_, free_ - additional_), kColorBg2);
int text_width = 0;
foreach (const Label& label, labels)
text_width += kLabelBoxSize + kLabelBoxPadding + kLabelSpacing + small_metrics.width(label.text);
// Draw the text
int x = (r.width() - text_width) / 2;
p->setRenderHint(QPainter::Antialiasing, false);
foreach (const Label& label, labels) {
const bool light = palette().color(QPalette::Base).value() > 128;
QRect box(x, r.top() + (r.height() - kLabelBoxSize)/2, kLabelBoxSize, kLabelBoxSize);
p->setPen(label.color.darker());
p->setBrush(label.color);
p->drawRect(box);
QRect text(x + kLabelBoxSize + kLabelBoxPadding, r.top(), small_metrics.width(label.text), r.height());
p->setPen(light ? label.color.darker() : label.color);
p->drawText(text, Qt::AlignCenter, label.text);
x += kLabelBoxSize + kLabelBoxPadding + kLabelSpacing + small_metrics.width(label.text);
}
}
QString FreeSpaceBar::TextForSize(const QString& prefix, qint64 size) const {
QString ret;
if (size > 0)
ret = Utilities::PrettySize(size);
else if (size < 0)
ret = "-" + Utilities::PrettySize(-size);
else
ret = "0 MB";
if (!prefix.isEmpty())
ret.prepend(prefix + " ");
return ret;
}