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

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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/
#include "stylehelper.h"
#include <QtGui/QPixmapCache>
#include <QtGui/QWidget>
#include <QtCore/QRect>
#include <QtGui/QPainter>
#include <QtGui/QApplication>
#include <QtGui/QPalette>
#include <QtGui/QStyleOption>
#include <QtCore/QObject>
// Clamps float color values within (0, 255)
static int clamp(float x)
{
const int val = x > 255 ? 255 : static_cast<int>(x);
return val < 0 ? 0 : val;
}
namespace Utils {
qreal StyleHelper::sidebarFontSize()
{
#if defined(Q_WS_MAC)
return 10;
#else
return 7.5;
#endif
}
QColor StyleHelper::panelTextColor(bool lightColored)
{
if (!lightColored)
return Qt::white;
else
return Qt::black;
}
// Invalid by default, setBaseColor needs to be called at least once
QColor StyleHelper::m_baseColor;
QColor StyleHelper::m_requestedBaseColor;
QColor StyleHelper::baseColor(bool lightColored)
{
if (!lightColored)
return m_baseColor;
else
return m_baseColor.lighter(230);
}
QColor StyleHelper::highlightColor(bool lightColored)
{
QColor result = baseColor(lightColored);
if (!lightColored)
result.setHsv(result.hue(),
clamp(result.saturation()),
clamp(result.value() * 1.16));
else
result.setHsv(result.hue(),
clamp(result.saturation()),
clamp(result.value() * 1.06));
return result;
}
QColor StyleHelper::shadowColor(bool lightColored)
{
QColor result = baseColor(lightColored);
result.setHsv(result.hue(),
clamp(result.saturation() * 1.1),
clamp(result.value() * 0.70));
return result;
}
QColor StyleHelper::borderColor(bool lightColored)
{
QColor result = baseColor(lightColored);
result.setHsv(result.hue(),
result.saturation(),
result.value() / 2);
return result;
}
// We try to ensure that the actual color used are within
// reasonalbe bounds while generating the actual baseColor
// from the users request.
void StyleHelper::setBaseColor(const QColor &newcolor)
{
m_requestedBaseColor = newcolor;
QColor color;
color.setHsv(newcolor.hue(),
newcolor.saturation() * 0.7,
64 + newcolor.value() / 3);
if (color.isValid() && color != m_baseColor) {
m_baseColor = color;
foreach (QWidget *w, QApplication::topLevelWidgets())
w->update();
}
}
static void verticalGradientHelper(QPainter *p, const QRect &spanRect, const QRect &rect, bool lightColored)
{
QColor highlight = StyleHelper::highlightColor(lightColored);
QColor shadow = StyleHelper::shadowColor(lightColored);
QLinearGradient grad(spanRect.topRight(), spanRect.topLeft());
grad.setColorAt(0, highlight.lighter(117));
grad.setColorAt(1, shadow.darker(109));
p->fillRect(rect, grad);
QColor light(255, 255, 255, 80);
p->setPen(light);
p->drawLine(rect.topRight() - QPoint(1, 0), rect.bottomRight() - QPoint(1, 0));
QColor dark(0, 0, 0, 90);
p->setPen(dark);
p->drawLine(rect.topLeft(), rect.bottomLeft());
}
void StyleHelper::verticalGradient(QPainter *painter, const QRect &spanRect, const QRect &clipRect, bool lightColored)
{
if (StyleHelper::usePixmapCache()) {
QString key;
QColor keyColor = baseColor(lightColored);
key.sprintf("mh_vertical %d %d %d %d %d",
spanRect.width(), spanRect.height(), clipRect.width(),
clipRect.height(), keyColor.rgb());;
QPixmap pixmap;
if (!QPixmapCache::find(key, pixmap)) {
pixmap = QPixmap(clipRect.size());
QPainter p(&pixmap);
QRect rect(0, 0, clipRect.width(), clipRect.height());
verticalGradientHelper(&p, spanRect, rect, lightColored);
p.end();
QPixmapCache::insert(key, pixmap);
}
painter->drawPixmap(clipRect.topLeft(), pixmap);
} else {
verticalGradientHelper(painter, spanRect, clipRect, lightColored);
}
}
// Draws a cached pixmap with shadow
void StyleHelper::drawIconWithShadow(const QIcon &icon, const QRect &rect,
QPainter *p, QIcon::Mode iconMode, int radius, const QColor &color, const QPoint &offset)
{
QPixmap cache;
QString pixmapName = QString("icon %0 %1 %2").arg(icon.cacheKey()).arg(iconMode).arg(rect.height());
if (!QPixmapCache::find(pixmapName, cache)) {
QPixmap px = icon.pixmap(rect.size());
cache = QPixmap(px.size() + QSize(radius * 2, radius * 2));
cache.fill(Qt::transparent);
QPainter cachePainter(&cache);
if (iconMode == QIcon::Disabled) {
QImage im = px.toImage().convertToFormat(QImage::Format_ARGB32);
for (int y=0; y<im.height(); ++y) {
QRgb *scanLine = (QRgb*)im.scanLine(y);
for (int x=0; x<im.width(); ++x) {
QRgb pixel = *scanLine;
char intensity = qGray(pixel);
*scanLine = qRgba(intensity, intensity, intensity, qAlpha(pixel));
++scanLine;
}
}
px = QPixmap::fromImage(im);
}
// Draw shadow
QImage tmp(px.size() + QSize(radius * 2, radius * 2 + 1), QImage::Format_ARGB32_Premultiplied);
tmp.fill(Qt::transparent);
QPainter tmpPainter(&tmp);
tmpPainter.setCompositionMode(QPainter::CompositionMode_Source);
tmpPainter.drawPixmap(QPoint(radius, radius), px);
tmpPainter.end();
// blur the alpha channel
QImage blurred(tmp.size(), QImage::Format_ARGB32_Premultiplied);
blurred.fill(Qt::transparent);
QPainter blurPainter(&blurred);
qt_blurImage(&blurPainter, tmp, radius, false, true);
blurPainter.end();
tmp = blurred;
// blacken the image...
tmpPainter.begin(&tmp);
tmpPainter.setCompositionMode(QPainter::CompositionMode_SourceIn);
tmpPainter.fillRect(tmp.rect(), color);
tmpPainter.end();
tmpPainter.begin(&tmp);
tmpPainter.setCompositionMode(QPainter::CompositionMode_SourceIn);
tmpPainter.fillRect(tmp.rect(), color);
tmpPainter.end();
// draw the blurred drop shadow...
cachePainter.drawImage(QRect(0, 0, cache.rect().width(), cache.rect().height()), tmp);
// Draw the actual pixmap...
cachePainter.drawPixmap(QPoint(radius, radius) + offset, px);
QPixmapCache::insert(pixmapName, cache);
}
QRect targetRect = cache.rect();
targetRect.moveCenter(rect.center());
p->drawPixmap(targetRect.topLeft() - offset, cache);
}
} // namespace Utils