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kde-workspace/libs/oxygen/oxygenhelper.cpp
Ivailo Monev 4a613cc1ab generic: drop unused oxygen style background pixmap feature 
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
2023-07-31 08:54:54 +00:00

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/*
* Copyright 2009-2010 Hugo Pereira Da Costa <hugo.pereira@free.fr>
* Copyright 2008 Long Huynh Huu <long.upcase@googlemail.com>
* Copyright 2007 Matthew Woehlke <mw_triad@users.sourceforge.net>
* Copyright 2007 Casper Boemann <cbr@boemann.dk>
* Copyright 2007 Fredrik Höglund <fredrik@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License version 2 as published by the Free Software Foundation.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "oxygenhelper.h"
#include <KColorUtils>
#include <KColorScheme>
#include <KDebug>
#include <KGlobalSettings>
#include <QtGui/QWidget>
#include <QtGui/QPainter>
#include <QtGui/QPen>
#include <math.h>
#ifdef Q_WS_X11
#include <QtGui/qx11info_x11.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <fixx11h.h>
#endif
namespace Oxygen
{
const qreal Helper::_slabThickness = 0.45;
const qreal Helper::_shadowGain = 1.5;
const qreal Helper::_glowBias = 0.6;
//____________________________________________________________________
// NOTE: Oxygen::StyleHelper needs to use a KConfig from its own KComponentData
// Since the ctor order causes a SEGV if we try to pass in a KConfig here from
// a KComponentData constructed in the OxygenStyleHelper ctor, we'll just keep
// one here, even though the window decoration doesn't really need it.
Helper::Helper( const QByteArray& componentName ):
_componentData( componentName, 0, KComponentData::SkipMainComponentRegistration )
{
_config = _componentData.config();
_contrast = KGlobalSettings::contrastF( _config );
// background contrast is calculated so that it is 0.9
// when KGlobalSettings contrast value of 0.7
_bgcontrast = qMin( 1.0, 0.9*_contrast/0.7 );
_backgroundCache.setMaxCost( 64 );
#ifdef Q_WS_X11
// create background atoms
_backgroundGradientAtom = XInternAtom( QX11Info::display(), "_KDE_OXYGEN_BACKGROUND_GRADIENT", False);
#endif
}
//____________________________________________________________________
KSharedConfigPtr Helper::config() const
{ return _config; }
//____________________________________________________________________
void Helper::reloadConfig()
{
_config->reparseConfiguration();
_contrast = KGlobalSettings::contrastF( _config );
_bgcontrast = qMin( 1.0, 0.9*_contrast/0.7 );
_viewFocusBrush = KStatefulBrush( KColorScheme::View, KColorScheme::FocusColor, config() );
_viewHoverBrush = KStatefulBrush( KColorScheme::View, KColorScheme::HoverColor, config() );
_viewNegativeTextBrush = KStatefulBrush( KColorScheme::View, KColorScheme::NegativeText, config() );
}
//____________________________________________________________________
void Helper::invalidateCaches()
{
_slabCache.clear();
_slabSunkenCache.clear();
_decoColorCache.clear();
_lightColorCache.clear();
_darkColorCache.clear();
_shadowColorCache.clear();
_backgroundTopColorCache.clear();
_backgroundBottomColorCache.clear();
_backgroundRadialColorCache.clear();
_backgroundColorCache.clear();
_backgroundCache.clear();
_dotCache.clear();
}
//____________________________________________________________________
void Helper::setMaxCacheSize( int value )
{
// assign value
_slabCache.setMaxCacheSize( value );
_slabSunkenCache.setMaxCost( value );
_backgroundCache.setMaxCost( value );
_dotCache.setMaxCost( value );
/* note: we do not limit the size of the color caches on purpose, since they should be small anyway */
}
//____________________________________________________________________
void Helper::renderWindowBackground( QPainter* p, const QRect& clipRect, const QWidget* widget, const QWidget* window, const QColor& color, int yShift, int gradientHeight )
{
// get coordinates relative to the client area
// this is stupid. One could use mapTo if this was taking const QWidget* and not
// QWidget* as argument.
const QWidget* w( widget );
int x( 0 );
int y( -yShift );
while ( w != window && !w->isWindow() && w != w->parentWidget() )
{
x += w->geometry().x();
y += w->geometry().y();
w = w->parentWidget();
}
if ( clipRect.isValid() )
{
p->save();
p->setClipRegion( clipRect,Qt::IntersectClip );
}
// calculate upper part height
// special tricks are needed
// to handle both window contents and window decoration
const QRect r = window->rect();
int height( window->frameGeometry().height() );
int width( window->frameGeometry().width() );
if( yShift > 0 )
{
height -= 2*yShift;
width -= 2*yShift;
}
// gradient offset
const int offset( gradientHeight - 20 );
// draw upper linear gradient
const int splitY( offset + qMin( 300, ( 3*height )/4 ) );
const QRect upperRect( -x, -y, r.width(), splitY );
QPixmap tile( verticalGradient( color, splitY, offset ) );
p->drawTiledPixmap( upperRect, tile );
// draw lower flat part
const QRect lowerRect( -x, splitY-y, r.width(), r.height() - splitY-yShift );
p->fillRect( lowerRect, backgroundBottomColor( color ) );
// draw upper radial gradient
const int radialW( qMin( 600, width ) );
const QRect radialRect( ( r.width() - radialW ) / 2-x, -y, radialW, offset + 64 );
if ( clipRect.intersects( radialRect ) )
{
tile = radialGradient( color, radialW, offset + 64 );
p->drawPixmap( radialRect, tile );
}
if ( clipRect.isValid() )
{ p->restore(); }
}
//_____________________________________________________________
void Helper::renderDot( QPainter* p, const QPoint& point, const QColor& baseColor )
{
const quint64 key( colorKey(baseColor) );
QPixmap* pixmap( _dotCache.object( key ) );
if( !pixmap )
{
pixmap = new QPixmap( 4, 4 );
pixmap->fill( Qt::transparent );
const qreal diameter( 1.8 );
QPainter painter( pixmap );
painter.setRenderHint( QPainter::Antialiasing );
painter.setPen( Qt::NoPen );
const QPoint center( pixmap->rect().center() );
// light ellipse
painter.setBrush( calcLightColor( baseColor ) );
painter.drawEllipse( QRectF( center.x()-diameter/2+1.0, center.y()-diameter/2+1.0, diameter, diameter ) );
// dark ellipse
painter.setBrush( calcDarkColor( baseColor ).darker( 130 ) );
painter.drawEllipse( QRectF( center.x()-diameter/2+0.5, center.y()-diameter/2+0.5, diameter, diameter ) );
painter.end();
// store in cache
_dotCache.insert( key, pixmap );
}
p->save();
p->translate( point - QPoint( 1,1 ) );
p->setRenderHint( QPainter::Antialiasing );
p->drawPixmap( QPoint( 0,0 ), *pixmap );
p->restore();
}
//____________________________________________________________________
bool Helper::lowThreshold( const QColor& color )
{
const quint32 key( colorKey(color) );
ColorMap::iterator iter( _lowThreshold.find( key ) );
if( iter != _lowThreshold.end() ) return iter.value();
else {
const QColor darker( KColorScheme::shade( color, KColorScheme::MidShade, 0.5 ) );
const bool result( KColorUtils::luma( darker ) > KColorUtils::luma( color ) );
_lowThreshold.insert( key, result );
return result;
}
}
//____________________________________________________________________
bool Helper::highThreshold( const QColor& color )
{
const quint32 key( colorKey(color) );
ColorMap::iterator iter( _highThreshold.find( key ) );
if( iter != _highThreshold.end() ) return iter.value();
else {
const QColor lighter( KColorScheme::shade( color, KColorScheme::LightShade, 0.5 ) );
const bool result( KColorUtils::luma( lighter ) < KColorUtils::luma( color ) );
_highThreshold.insert( key, result );
return result;
}
}
//____________________________________________________________________
QColor Helper::alphaColor( QColor color, qreal alpha )
{
if( alpha >= 0 && alpha < 1.0 )
{ color.setAlphaF( alpha*color.alphaF() ); }
return color;
}
//____________________________________________________________________
const QColor& Helper::backgroundRadialColor( const QColor& color )
{
const quint64 key( colorKey(color) );
QColor* out( _backgroundRadialColorCache.object( key ) );
if( !out )
{
if( lowThreshold( color ) ) out = new QColor( KColorScheme::shade( color, KColorScheme::LightShade, 0.0 ) );
else if( highThreshold( color ) ) out = new QColor( color );
else out = new QColor( KColorScheme::shade( color, KColorScheme::LightShade, _bgcontrast ) );
_backgroundRadialColorCache.insert( key, out );
}
return *out;
}
//_________________________________________________________________________
const QColor& Helper::backgroundTopColor( const QColor& color )
{
const quint64 key( colorKey(color) );
QColor* out( _backgroundTopColorCache.object( key ) );
if( !out )
{
if( lowThreshold( color ) ) out = new QColor( KColorScheme::shade( color, KColorScheme::MidlightShade, 0.0 ) );
else {
const qreal my( KColorUtils::luma( KColorScheme::shade( color, KColorScheme::LightShade, 0.0 ) ) );
const qreal by( KColorUtils::luma( color ) );
out = new QColor( KColorUtils::shade( color, ( my - by ) * _bgcontrast ) );
}
_backgroundTopColorCache.insert( key, out );
}
return *out;
}
//_________________________________________________________________________
const QColor& Helper::backgroundBottomColor( const QColor& color )
{
const quint64 key( colorKey(color) );
QColor* out( _backgroundBottomColorCache.object( key ) );
if( !out )
{
const QColor midColor( KColorScheme::shade( color, KColorScheme::MidShade, 0.0 ) );
if( lowThreshold( color ) ) out = new QColor( midColor );
else {
const qreal by( KColorUtils::luma( color ) );
const qreal my( KColorUtils::luma( midColor ) );
out = new QColor( KColorUtils::shade( color, ( my - by ) * _bgcontrast ) );
}
_backgroundBottomColorCache.insert( key, out );
}
return *out;
}
//____________________________________________________________________
const QColor& Helper::calcLightColor( const QColor& color )
{
const quint64 key( colorKey(color) );
QColor* out( _lightColorCache.object( key ) );
if( !out )
{
out = new QColor( highThreshold( color ) ? color: KColorScheme::shade( color, KColorScheme::LightShade, _contrast ) );
_lightColorCache.insert( key, out );
}
return *out;
}
//____________________________________________________________________
const QColor& Helper::calcDarkColor( const QColor& color )
{
const quint64 key( colorKey(color) );
QColor* out( _darkColorCache.object( key ) );
if( !out )
{
out = new QColor( ( lowThreshold( color ) ) ?
KColorUtils::mix( calcLightColor( color ), color, 0.3 + 0.7 * _contrast ):
KColorScheme::shade( color, KColorScheme::MidShade, _contrast ) );
_darkColorCache.insert( key, out );
}
return *out;
}
//____________________________________________________________________
const QColor& Helper::calcShadowColor( const QColor& color )
{
const quint64 key( colorKey(color) );
QColor* out( _shadowColorCache.object( key ) );
if( !out )
{
out = new QColor( ( lowThreshold( color ) ) ?
KColorUtils::mix( Qt::black, color, color.alphaF() ) :
KColorScheme::shade(
KColorUtils::mix( Qt::black, color, color.alphaF() ),
KColorScheme::ShadowShade,
_contrast ) );
// make sure shadow color has the same alpha channel as the input
out->setAlpha( color.alpha() );
// insert in cache
_shadowColorCache.insert( key, out );
}
return *out;
}
//____________________________________________________________________
const QColor& Helper::backgroundColor( const QColor& color, qreal ratio )
{
const quint64 key( ( colorKey(color) << 32 ) | int( ratio*512 ) );
QColor *out( _backgroundColorCache.object( key ) );
if( !out )
{
if( ratio < 0.5 )
{
const qreal a( 2.0*ratio );
out = new QColor( KColorUtils::mix( backgroundTopColor( color ), color, a ) );
} else {
const qreal a( 2.0*ratio-1 );
out = new QColor( KColorUtils::mix( color, backgroundBottomColor( color ), a ) );
}
_backgroundColorCache.insert( key, out );
}
return *out;
}
//____________________________________________________________________
QPixmap Helper::verticalGradient( const QColor& color, int height, int offset )
{
const quint64 key( ( colorKey(color) << 32 ) | height | 0x8000 );
QPixmap* pixmap( _backgroundCache.object( key ) );
if ( !pixmap )
{
pixmap = new QPixmap( 1, height );
pixmap->fill( Qt::transparent );
QLinearGradient gradient( 0, offset, 0, height );
gradient.setColorAt( 0.0, backgroundTopColor( color ) );
gradient.setColorAt( 0.5, color );
gradient.setColorAt( 1.0, backgroundBottomColor( color ) );
QPainter p( pixmap );
p.fillRect( pixmap->rect(), gradient );
p.end();
_backgroundCache.insert( key, pixmap );
}
return *pixmap;
}
//____________________________________________________________________
QPixmap Helper::radialGradient( const QColor& color, int width, int height )
{
const quint64 key( ( colorKey(color) << 32 ) | width | 0xb000 );
QPixmap* pixmap( _backgroundCache.object( key ) );
if ( !pixmap )
{
pixmap = new QPixmap( width, height );
pixmap->fill( Qt::transparent );
QRadialGradient gradient( 64, height-64, 64 );
QColor radialColor = backgroundRadialColor( color );
radialColor.setAlpha( 255 ); gradient.setColorAt( 0, radialColor );
radialColor.setAlpha( 101 ); gradient.setColorAt( 0.5, radialColor );
radialColor.setAlpha( 37 ); gradient.setColorAt( 0.75, radialColor );
radialColor.setAlpha( 0 ); gradient.setColorAt( 1, radialColor );
QPainter painter( pixmap );
painter.setWindow( 0, 0, 128, height );
painter.fillRect( QRect( 0,0,128,height ), gradient );
painter.end();
_backgroundCache.insert( key, pixmap );
}
return *pixmap;
}
//____________________________________________________________________________________
const QColor& Helper::decoColor( const QColor& background, const QColor& color )
{
const quint64 key( ( colorKey(background) << 32 ) | colorKey(color) );
QColor* out( _decoColorCache.object( key ) );
if( !out )
{
out = new QColor( KColorUtils::mix( background, color, 0.8*(1.0 + _contrast ) ) );
_decoColorCache.insert( key, out );
}
return *out;
}
//_______________________________________________________________________
QRegion Helper::roundedMask( const QRect& r, int left, int right, int top, int bottom ) const
{
// get rect geometry
int x, y, w, h;
r.getRect( &x, &y, &w, &h );
QRegion mask( x + 4*left, y + 0*top, w-4*( left+right ), h-0*( top+bottom ) );
mask += QRegion( x + 0*left, y + 4*top, w-0*( left+right ), h-4*( top+bottom ) );
mask += QRegion( x + 2*left, y + 1*top, w-2*( left+right ), h-1*( top+bottom ) );
mask += QRegion( x + 1*left, y + 2*top, w-1*( left+right ), h-2*( top+bottom ) );
return mask;
}
//______________________________________________________________________
void Helper::drawFloatFrame(
QPainter* p, const QRect r,
const QColor& color,
bool drawUglyShadow, bool isActive, const QColor& frameColor, TileSet::Tiles tiles )
{
p->save();
p->setRenderHint( QPainter::Antialiasing );
const QRect frame( r.adjusted( 1,1,-1,-1 ) );
int x,y,w,h;
frame.getRect( &x, &y, &w, &h );
QColor light( calcLightColor( backgroundTopColor( color ) ) );
QColor dark( calcLightColor( backgroundBottomColor( color ) ) );
p->setBrush( Qt::NoBrush );
if ( drawUglyShadow )
{
if( isActive )
{
//window active - it's a glow - not a shadow
const QColor glow( KColorUtils::mix( QColor( 128,128,128 ), frameColor, 0.7 ) );
p->setPen( glow );
if( tiles & TileSet::Top )
{
p->drawLine( QPointF( x+4, y-0.5 ), QPointF( x+w-4, y-0.5 ) );
p->drawArc( QRectF( x-0.5, y-0.5, 11, 11 ),90*16, 90*16 );
p->drawArc( QRectF( x+w-11+0.5, y-0.5, 11, 11 ), 0, 90*16 );
}
if( tiles & TileSet::Left ) p->drawLine( QPointF( x-0.5, y+4 ), QPointF( x-0.5, y+h-4 ) );
if( tiles & TileSet::Right ) p->drawLine( QPointF( x+w+0.5, y+4 ), QPointF( x+w+0.5, y+h-4 ) );
if( tiles & TileSet::Bottom )
{
if( tiles & TileSet::Left ) p->drawArc( QRectF( x-0.5, y+h-11+0.5, 11, 11 ),180*16, 90*16 );
if( tiles & TileSet::Right ) p->drawArc( QRectF( x+w-11+0.5, y+h-11+0.5, 11, 11 ),270*16, 90*16 );
p->drawLine( QPointF( x+4, y+h+0.5 ), QPointF( x+w-4, y+h+0.5 ) );
}
light = KColorUtils::mix( light, frameColor );
dark = KColorUtils::mix( dark, frameColor );
} else {
// window inactive - draw something resembling shadow
// fully desaturate
const QColor shadow( KColorUtils::darken( color, 0.0, 0.0 ) );
if( tiles & TileSet::Top )
{
p->setPen( KColorUtils::darken( shadow, 0.2 ) );
p->drawLine( QPointF( x+4, y-0.5 ), QPointF( x+w-4, y-0.5 ) );
if( tiles & TileSet::Left ) p->drawArc( QRectF( x-0.5, y-0.5, 11, 11 ),90*16, 90*16 );
if( tiles & TileSet::Right ) p->drawArc( QRectF( x+w-11+0.5, y-0.5, 11, 11 ), 0, 90*16 );
}
p->setPen( KColorUtils::darken( shadow, 0.35 ) );
if( tiles & TileSet::Left ) p->drawLine( QPointF( x-0.5, y+4 ), QPointF( x-0.5, y+h-4 ) );
if( tiles & TileSet::Right ) p->drawLine( QPointF( x+w+0.5, y+4 ), QPointF( x+w+0.5, y+h-4 ) );
if( tiles & TileSet::Bottom )
{
p->setPen( KColorUtils::darken( shadow, 0.45 ) );
if( tiles & TileSet::Left ) p->drawArc( QRectF( x-0.5, y+h-11+0.5, 11, 11 ),180*16, 90*16 );
if( tiles & TileSet::Right ) p->drawArc( QRectF( x+w-11+0.5, y+h-11+0.5, 11, 11 ),270*16, 90*16 );
p->setPen( KColorUtils::darken( shadow, 0.6 ) );
p->drawLine( QPointF( x+4, y+h+0.5 ), QPointF( x+w-4, y+h+0.5 ) );
}
}
}
// top frame
if( tiles & TileSet::Top )
{
p->setPen( QPen( light, 0.8 ) );
p->drawLine( QPointF( x+4, y+0.6 ), QPointF( x+w-4, y+0.6 ) );
}
// corner and side frames
// sides are drawn even if Top only is selected, but with a different gradient
if( h >= 4+1.5 )
{
QLinearGradient lg( 0.0, y+1.5, 0.0, y+h-4 );
lg.setColorAt( 0, light );
lg.setColorAt( 1, alphaColor( light, 0 ) );
if( h > 20.5 ) lg.setColorAt( qMax( 0.0, 1.0 - 12.0/( h-5.5 ) ), alphaColor( light, 0.5 ) );
else if( h > 8.5 ) lg.setColorAt( qMax( 0.0, 3.0/( h-5.5 ) ), alphaColor( light, 0.5 ) );
p->setPen( QPen( lg, 0.8 ) );
if( tiles & TileSet::Left ) p->drawLine( QPointF( x+0.6, y+4 ), QPointF( x+0.6, y+h-4 ) );
if( tiles & TileSet::Right ) p->drawLine( QPointF( x+w-0.6, y+4 ), QPointF( x+w-0.6, y+h-4 ) );
}
if( tiles & TileSet::Top )
{
const qreal offset = 0.5;
const qreal arc( 7.0 );
p->drawArc( QRectF( x+offset, y+offset, arc, arc ),90*16, 90*16 );
p->drawArc( QRectF( x+w-arc-offset, y+offset, arc, arc ), 0, 90*16 );
}
p->restore();
}
//______________________________________________________________________________________
void Helper::drawSeparator( QPainter* p, const QRect& rect, const QColor& color, Qt::Orientation orientation )
{
QColor light( calcLightColor( color ) );
QColor dark( calcDarkColor( color ) );
p->save();
p->setRenderHint( QPainter::Antialiasing,false );
QPoint start,end,offset;
if ( orientation == Qt::Horizontal )
{
start = QPoint( rect.x(),rect.y()+rect.height()/2-1 );
end = QPoint( rect.right(),rect.y()+rect.height()/2-1 );
offset = QPoint( 0,1 );
} else {
start = QPoint( rect.x()+rect.width()/2-1,rect.y() );
end = QPoint( rect.x()+rect.width()/2-1,rect.bottom() );
offset = QPoint( 1,0 );
light.setAlpha( 150 );
}
QLinearGradient lg( start,end );
lg.setColorAt( 0.3, dark );
lg.setColorAt( 0.7, dark );
dark.setAlpha( 0 );
lg.setColorAt( 0.0, dark );
lg.setColorAt( 1.0, dark );
p->setPen( QPen( lg,1 ) );
if ( orientation == Qt::Horizontal ) p->drawLine( start,end );
else p->drawLine( start+offset,end+offset );
lg = QLinearGradient( start,end );
lg.setColorAt( 0.3, light );
lg.setColorAt( 0.7, light );
light.setAlpha( 0 );
lg.setColorAt( 0.0, light );
lg.setColorAt( 1.0, light );
p->setPen( QPen( lg,1 ) );
if ( orientation == Qt::Horizontal ) p->drawLine( start+offset,end+offset );
else
{
p->drawLine( start,end );
p->drawLine( start+offset*2,end+offset*2 );
}
p->restore();
}
//________________________________________________________________________________________________________
TileSet *Helper::slab( const QColor& color, const QColor& glow, qreal shade, int size )
{
Oxygen::Cache<TileSet>::Value* cache( _slabCache.get( color ) );
const quint64 key( ( colorKey(glow) << 32 ) | ( quint64( 256.0 * shade ) << 24 ) | size );
TileSet *tileSet = cache->object( key );
const qreal hScale( 1 );
const int hSize( size*hScale );
const int vSize( size );
if ( !tileSet )
{
QPixmap pixmap( hSize*2,vSize*2 );
pixmap.fill( Qt::transparent );
QPainter p( &pixmap );
p.setRenderHints( QPainter::Antialiasing );
p.setPen( Qt::NoPen );
const int fixedSize( 14 );
p.setWindow( 0,0,fixedSize*hScale, fixedSize );
// draw all components
if( color.isValid() ) drawShadow( p, calcShadowColor( color ), 14 );
if( glow.isValid() ) drawOuterGlow( p, glow, 14 );
if( color.isValid() ) drawSlab( p, color, shade );
p.end();
tileSet = new TileSet( pixmap, hSize, vSize, hSize, vSize, hSize-1, vSize, 2, 1 );
cache->insert( key, tileSet );
}
return tileSet;
}
//________________________________________________________________________________________________________
TileSet *Helper::slabSunken( const QColor& color, int size )
{
const quint64 key( colorKey(color) << 32 | size );
TileSet *tileSet = _slabSunkenCache.object( key );
if ( !tileSet )
{
QPixmap pixmap( size*2, size*2 );
pixmap.fill( Qt::transparent );
QPainter p( &pixmap );
p.setRenderHints( QPainter::Antialiasing );
p.setPen( Qt::NoPen );
p.setWindow( 0,0,14,14 );
// shadow
p.setCompositionMode( QPainter::CompositionMode_SourceOver );
drawInverseShadow( p, calcShadowColor( color ), 3, 8, 0.0 );
// contrast pixel
{
QColor light( calcLightColor( color ) );
QLinearGradient blend( 0, 2, 0, 16 );
blend.setColorAt( 0.5, Qt::transparent );
blend.setColorAt( 1.0, light );
p.setBrush( Qt::NoBrush );
p.setPen( QPen( blend, 1 ) );
p.drawRoundedRect( QRectF( 2.5, 2.5, 9, 9 ), 4.0, 4.0 );
p.setPen( Qt::NoPen );
}
p.end();
tileSet = new TileSet( pixmap, size, size, size, size, size-1, size, 2, 1 );
_slabSunkenCache.insert( key, tileSet );
}
return tileSet;
}
//________________________________________________________________________________________________________
void Helper::fillSlab( QPainter& p, const QRect& rect, int size ) const
{
const qreal s( qreal( size ) * ( 3.6 + ( 0.5 * _slabThickness ) ) / 7.0 );
const QRectF r( QRectF( rect ).adjusted( s, s, -s, -s ) );
if( !r.isValid() ) return;
p.drawRoundedRect( r, s/2, s/2 );
}
//________________________________________________________________________________________________________
void Helper::fillButtonSlab( QPainter& painter, const QRect& r, const QColor& color, bool sunken )
{
painter.save();
painter.setRenderHint( QPainter::Antialiasing );
painter.setPen( Qt::NoPen );
if( sunken && calcShadowColor( color ).value() > color.value() )
{
QLinearGradient innerGradient( 0, r.top(), 0, r.bottom() + r.height() );
innerGradient.setColorAt( 0.0, color );
innerGradient.setColorAt( 1.0, calcLightColor( color ) );
painter.setBrush( innerGradient );
} else if( sunken ) {
QLinearGradient innerGradient( 0, r.top() - r.height(), 0, r.bottom() );
innerGradient.setColorAt( 0.0, calcLightColor( color ) );
innerGradient.setColorAt( 1.0, color );
painter.setBrush( innerGradient );
} else {
QLinearGradient innerGradient( 0, r.top()-0.2*r.height(), 0, r.bottom()+ 0.4*r.height() );
innerGradient.setColorAt( 0.0, calcLightColor( color ) );
innerGradient.setColorAt( 0.6, color );
painter.setBrush( innerGradient );
}
fillSlab( painter, r );
painter.restore();
}
//________________________________________________________________________________________________________
void Helper::drawInverseShadow(
QPainter& p, const QColor& color,
int pad, int size, qreal fuzz ) const
{
const qreal m( qreal( size )*0.5 );
const qreal offset( 0.8 );
const qreal k0( ( m-2 ) / qreal( m+2.0 ) );
QRadialGradient shadowGradient( pad+m, pad+m+offset, m+2 );
for ( int i = 0; i < 8; i++ )
{
// sinusoidal gradient
const qreal k1( ( qreal( 8 - i ) + k0 * qreal( i ) ) * 0.125 );
const qreal a( ( cos( 3.14159 * i * 0.125 ) + 1.0 ) * 0.25 );
shadowGradient.setColorAt( k1, alphaColor( color, a * _shadowGain ) );
}
shadowGradient.setColorAt( k0, alphaColor( color, 0.0 ) );
p.setBrush( shadowGradient );
p.drawEllipse( QRectF( pad-fuzz, pad-fuzz, size+fuzz*2.0, size+fuzz*2.0 ) );
}
//____________________________________________________________________
const QWidget* Helper::checkAutoFillBackground( const QWidget* w ) const
{
if( !w ) return NULL;
if( w->autoFillBackground() ) return w;
if( w->isWindow() ) return 0;
for( const QWidget* parent = w->parentWidget(); parent!=0; parent = parent->parentWidget() )
{
if( parent->autoFillBackground() ) return parent;
if( parent == w->window() ) break;
}
return NULL;
}
//____________________________________________________________________
void Helper::setHasBackgroundGradient( WId id, bool value ) const
{
#ifdef Q_WS_X11
setHasHint( id, _backgroundGradientAtom, value );
#else
Q_UNUSED( id );
Q_UNUSED( value );
#endif
return;
}
//____________________________________________________________________
bool Helper::hasBackgroundGradient( WId id ) const
{
#ifdef Q_WS_X11
return hasHint( id, _backgroundGradientAtom );
#else
Q_UNUSED( id );
return false;
#endif
}
//______________________________________________________________________________________
void Helper::drawSlab( QPainter& p, const QColor& color, qreal shade )
{
const QColor light( KColorUtils::shade( calcLightColor( color ), shade ) );
const QColor base( alphaColor( light, 0.85 ) );
const QColor dark( KColorUtils::shade( calcDarkColor( color ), shade ) );
// bevel, part 1
p.save();
const qreal y( KColorUtils::luma( base ) );
const qreal yl( KColorUtils::luma( light ) );
const qreal yd( KColorUtils::luma( dark ) );
QLinearGradient bevelGradient1( 0, 7, 0, 11 );
bevelGradient1.setColorAt( 0.0, light );
if ( y < yl && y > yd )
{
// no middle when color is very light/dark
bevelGradient1.setColorAt( 0.5, base );
}
bevelGradient1.setColorAt( 0.9, base );
p.setBrush( bevelGradient1 );
p.drawRoundedRect( QRectF( 3.0,3.0,8.0,8.0 ), 3.5, 3.5 );
// bevel, part 2
if ( _slabThickness > 0.0 )
{
QLinearGradient bevelGradient2( 0, 6, 0, 19 );
bevelGradient2.setColorAt( 0.0, light );
bevelGradient2.setColorAt( 0.9, base );
p.setBrush( bevelGradient2 );
p.drawEllipse( QRectF( 3.6,3.6,6.8,6.8 ) );
}
// inside mask
p.setCompositionMode( QPainter::CompositionMode_DestinationOut );
p.setBrush( Qt::black );
const qreal ic( 3.6 + 0.5*_slabThickness );
const qreal is( 14.0 - 2.0*ic );
p.drawEllipse( QRectF( ic, ic, is, is ) );
p.restore();
}
//___________________________________________________________________________________________
void Helper::drawShadow( QPainter& p, const QColor& color, int size )
{
const qreal m( qreal( size-2 )*0.5 );
const qreal offset( 0.8 );
const qreal k0( ( m-4.0 ) / m );
QRadialGradient shadowGradient( m+1.0, m+offset+1.0, m );
for ( int i = 0; i < 8; i++ )
{
// sinusoidal gradient
const qreal k1( ( k0 * qreal( 8 - i ) + qreal( i ) ) * 0.125 );
const qreal a( ( cos( M_PI * i * 0.125 ) + 1.0 ) * 0.30 );
shadowGradient.setColorAt( k1, alphaColor( color, a * _shadowGain ) );
}
shadowGradient.setColorAt( 1.0, alphaColor( color, 0.0 ) );
p.save();
p.setBrush( shadowGradient );
p.drawEllipse( QRectF( 0, 0, size, size ) );
p.restore();
}
//_______________________________________________________________________
void Helper::drawOuterGlow( QPainter& p, const QColor& color, int size )
{
const QRectF r( 0, 0, size, size );
const qreal m( qreal( size )*0.5 );
const qreal width( 3 );
const qreal bias( _glowBias * qreal( 14 )/size );
// k0 is located at width - bias from the outer edge
const qreal gm( m + bias - 0.9 );
const qreal k0( ( m-width+bias ) / gm );
QRadialGradient glowGradient( m, m, gm );
for ( int i = 0; i < 8; i++ )
{
// k1 grows linearly from k0 to 1.0
const qreal k1( k0 + qreal( i )*( 1.0-k0 )/8.0 );
// a folows sqrt curve
const qreal a( 1.0 - sqrt( qreal( i )/8 ) );
glowGradient.setColorAt( k1, alphaColor( color, a ) );
}
// glow
p.save();
p.setBrush( glowGradient );
p.drawEllipse( r );
// inside mask
p.setCompositionMode( QPainter::CompositionMode_DestinationOut );
p.setBrush( Qt::black );
p.drawEllipse( r.adjusted( width+0.5, width+0.5, -width-1, -width-1 ) );
p.restore();
}
#ifdef Q_WS_X11
//____________________________________________________________________
void Helper::setHasHint( WId id, Atom atom, bool value ) const
{
if( !id ) return;
unsigned long uLongValue( value );
XChangeProperty(
QX11Info::display(), id, atom, XA_CARDINAL, 32, PropModeReplace,
reinterpret_cast<const unsigned char *>(&uLongValue), 1 );
return;
}
//____________________________________________________________________
bool Helper::hasHint( WId id, Atom atom ) const
{
if( !id ) return false;
Atom type( None );
int format(0);
unsigned char *data(0);
unsigned long n(0), left(0);
XGetWindowProperty(
QX11Info::display(), id, atom,
0, 1L, false,
XA_CARDINAL, &type,
&format, &n, &left,
&data);
// finish if no data is found
if( data == NULL || n != 1 ) return false;
else return *data;
}
#endif
}
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