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breeze/kdecoration/breezedecoration.cpp

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/*
* Copyright 2014 Martin Gräßlin <mgraesslin@kde.org>
* Copyright 2014 Hugo Pereira Da Costa <hugo.pereira@free.fr>
* Copyright 2018 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
*
* 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) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy
* defined in Section 14 of version 3 of the license.
*
* 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. If not, see <http://www.gnu.org/licenses/>.
*/
#include "breezedecoration.h"
#include "breeze.h"
#include "breezesettingsprovider.h"
#include "config-breeze.h"
#include "config/breezeconfigwidget.h"
#include "breezebutton.h"
#include "breezesizegrip.h"
#include "breezeboxshadowrenderer.h"
#include <KDecoration2/DecoratedClient>
#include <KDecoration2/DecorationButtonGroup>
#include <KDecoration2/DecorationSettings>
#include <KDecoration2/DecorationShadow>
#include <KConfigGroup>
#include <KColorUtils>
#include <KSharedConfig>
#include <KPluginFactory>
#include <QPainter>
#include <QTextStream>
#include <QTimer>
#include <QVariantAnimation>
#if BREEZE_HAVE_X11
#include <QX11Info>
#endif
#include <cmath>
K_PLUGIN_FACTORY_WITH_JSON(
BreezeDecoFactory,
"breeze.json",
registerPlugin<Breeze::Decoration>();
registerPlugin<Breeze::Button>(QStringLiteral("button"));
registerPlugin<Breeze::ConfigWidget>(QStringLiteral("kcmodule"));
)
namespace
{
struct ShadowParams {
ShadowParams()
: offset(QPoint(0, 0))
, radius(0)
, opacity(0) {}
ShadowParams(const QPoint &offset, int radius, qreal opacity)
: offset(offset)
, radius(radius)
, opacity(opacity) {}
QPoint offset;
int radius;
qreal opacity;
};
struct CompositeShadowParams {
CompositeShadowParams() = default;
CompositeShadowParams(
const QPoint &offset,
const ShadowParams &shadow1,
const ShadowParams &shadow2)
: offset(offset)
, shadow1(shadow1)
, shadow2(shadow2) {}
bool isNone() const {
return qMax(shadow1.radius, shadow2.radius) == 0;
}
QPoint offset;
ShadowParams shadow1;
ShadowParams shadow2;
};
const CompositeShadowParams s_shadowParams[] = {
// None
CompositeShadowParams(),
// Small
CompositeShadowParams(
QPoint(0, 4),
ShadowParams(QPoint(0, 0), 16, 1),
ShadowParams(QPoint(0, -2), 8, 0.4)),
// Medium
CompositeShadowParams(
QPoint(0, 8),
ShadowParams(QPoint(0, 0), 32, 0.9),
ShadowParams(QPoint(0, -4), 16, 0.3)),
// Large
CompositeShadowParams(
QPoint(0, 12),
ShadowParams(QPoint(0, 0), 48, 0.8),
ShadowParams(QPoint(0, -6), 24, 0.2)),
// Very large
CompositeShadowParams(
QPoint(0, 16),
ShadowParams(QPoint(0, 0), 64, 0.7),
ShadowParams(QPoint(0, -8), 32, 0.1)),
};
inline CompositeShadowParams lookupShadowParams(int size)
{
switch (size) {
case Breeze::InternalSettings::ShadowNone:
return s_shadowParams[0];
case Breeze::InternalSettings::ShadowSmall:
return s_shadowParams[1];
case Breeze::InternalSettings::ShadowMedium:
return s_shadowParams[2];
case Breeze::InternalSettings::ShadowLarge:
return s_shadowParams[3];
case Breeze::InternalSettings::ShadowVeryLarge:
return s_shadowParams[4];
default:
// Fallback to the Large size.
return s_shadowParams[3];
}
}
}
namespace Breeze
{
using KDecoration2::ColorRole;
using KDecoration2::ColorGroup;
//________________________________________________________________
static int g_sDecoCount = 0;
static int g_shadowSizeEnum = InternalSettings::ShadowLarge;
static int g_shadowStrength = 255;
static QColor g_shadowColor = Qt::black;
static QSharedPointer<KDecoration2::DecorationShadow> g_sShadow;
//________________________________________________________________
Decoration::Decoration(QObject *parent, const QVariantList &args)
: KDecoration2::Decoration(parent, args)
, m_animation( new QVariantAnimation( this ) )
{
g_sDecoCount++;
}
//________________________________________________________________
Decoration::~Decoration()
{
g_sDecoCount--;
if (g_sDecoCount == 0) {
// last deco destroyed, clean up shadow
g_sShadow.clear();
}
deleteSizeGrip();
}
//________________________________________________________________
void Decoration::setOpacity( qreal value )
{
if( m_opacity == value ) return;
m_opacity = value;
update();
if( m_sizeGrip ) m_sizeGrip->update();
}
//________________________________________________________________
QColor Decoration::titleBarColor() const
{
auto c = client().data();
if( hideTitleBar() ) return c->color( ColorGroup::Inactive, ColorRole::TitleBar );
else if( m_animation->state() == QAbstractAnimation::Running )
{
return KColorUtils::mix(
c->color( ColorGroup::Inactive, ColorRole::TitleBar ),
c->color( ColorGroup::Active, ColorRole::TitleBar ),
m_opacity );
} else return c->color( c->isActive() ? ColorGroup::Active : ColorGroup::Inactive, ColorRole::TitleBar );
}
//________________________________________________________________
QColor Decoration::outlineColor() const
{
auto c( client().data() );
if( !m_internalSettings->drawTitleBarSeparator() ) return QColor();
if( m_animation->state() == QAbstractAnimation::Running )
{
QColor color( c->palette().color( QPalette::Highlight ) );
color.setAlpha( color.alpha()*m_opacity );
return color;
} else if( c->isActive() ) return c->palette().color( QPalette::Highlight );
else return QColor();
}
//________________________________________________________________
QColor Decoration::fontColor() const
{
auto c = client().data();
if( m_animation->state() == QAbstractAnimation::Running )
{
return KColorUtils::mix(
c->color( ColorGroup::Inactive, ColorRole::Foreground ),
c->color( ColorGroup::Active, ColorRole::Foreground ),
m_opacity );
} else return c->color( c->isActive() ? ColorGroup::Active : ColorGroup::Inactive, ColorRole::Foreground );
}
//________________________________________________________________
void Decoration::init()
{
auto c = client().data();
// active state change animation
// It is important start and end value are of the same type, hence 0.0 and not just 0
m_animation->setStartValue( 0.0 );
m_animation->setEndValue( 1.0 );
m_animation->setEasingCurve( QEasingCurve::InOutQuad );
connect(m_animation, &QVariantAnimation::valueChanged, this, [this](const QVariant &value) {
setOpacity(value.toReal());
});
reconfigure();
updateTitleBar();
auto s = settings();
connect(s.data(), &KDecoration2::DecorationSettings::borderSizeChanged, this, &Decoration::recalculateBorders);
// a change in font might cause the borders to change
connect(s.data(), &KDecoration2::DecorationSettings::fontChanged, this, &Decoration::recalculateBorders);
connect(s.data(), &KDecoration2::DecorationSettings::spacingChanged, this, &Decoration::recalculateBorders);
// buttons
connect(s.data(), &KDecoration2::DecorationSettings::spacingChanged, this, &Decoration::updateButtonsGeometryDelayed);
connect(s.data(), &KDecoration2::DecorationSettings::decorationButtonsLeftChanged, this, &Decoration::updateButtonsGeometryDelayed);
connect(s.data(), &KDecoration2::DecorationSettings::decorationButtonsRightChanged, this, &Decoration::updateButtonsGeometryDelayed);
// full reconfiguration
connect(s.data(), &KDecoration2::DecorationSettings::reconfigured, this, &Decoration::reconfigure);
connect(s.data(), &KDecoration2::DecorationSettings::reconfigured, SettingsProvider::self(), &SettingsProvider::reconfigure, Qt::UniqueConnection );
connect(s.data(), &KDecoration2::DecorationSettings::reconfigured, this, &Decoration::updateButtonsGeometryDelayed);
connect(c, &KDecoration2::DecoratedClient::adjacentScreenEdgesChanged, this, &Decoration::recalculateBorders);
connect(c, &KDecoration2::DecoratedClient::maximizedHorizontallyChanged, this, &Decoration::recalculateBorders);
connect(c, &KDecoration2::DecoratedClient::maximizedVerticallyChanged, this, &Decoration::recalculateBorders);
connect(c, &KDecoration2::DecoratedClient::shadedChanged, this, &Decoration::recalculateBorders);
connect(c, &KDecoration2::DecoratedClient::captionChanged, this,
[this]()
{
// update the caption area
update(titleBar());
}
);
connect(c, &KDecoration2::DecoratedClient::activeChanged, this, &Decoration::updateAnimationState);
connect(c, &KDecoration2::DecoratedClient::widthChanged, this, &Decoration::updateTitleBar);
connect(c, &KDecoration2::DecoratedClient::maximizedChanged, this, &Decoration::updateTitleBar);
connect(c, &KDecoration2::DecoratedClient::maximizedChanged, this, &Decoration::setOpaque);
connect(c, &KDecoration2::DecoratedClient::widthChanged, this, &Decoration::updateButtonsGeometry);
connect(c, &KDecoration2::DecoratedClient::maximizedChanged, this, &Decoration::updateButtonsGeometry);
connect(c, &KDecoration2::DecoratedClient::adjacentScreenEdgesChanged, this, &Decoration::updateButtonsGeometry);
connect(c, &KDecoration2::DecoratedClient::shadedChanged, this, &Decoration::updateButtonsGeometry);
createButtons();
createShadow();
}
//________________________________________________________________
void Decoration::updateTitleBar()
{
auto s = settings();
auto c = client().data();
const bool maximized = isMaximized();
const int width = maximized ? c->width() : c->width() - 2*s->largeSpacing()*Metrics::TitleBar_SideMargin;
const int height = maximized ? borderTop() : borderTop() - s->smallSpacing()*Metrics::TitleBar_TopMargin;
const int x = maximized ? 0 : s->largeSpacing()*Metrics::TitleBar_SideMargin;
const int y = maximized ? 0 : s->smallSpacing()*Metrics::TitleBar_TopMargin;
setTitleBar(QRect(x, y, width, height));
}
//________________________________________________________________
void Decoration::updateAnimationState()
{
if( m_internalSettings->animationsEnabled() )
{
auto c = client().data();
m_animation->setDirection( c->isActive() ? QAbstractAnimation::Forward : QAbstractAnimation::Backward );
if( m_animation->state() != QAbstractAnimation::Running ) m_animation->start();
} else {
update();
}
}
//________________________________________________________________
void Decoration::updateSizeGripVisibility()
{
auto c = client().data();
if( m_sizeGrip )
{ m_sizeGrip->setVisible( c->isResizeable() && !isMaximized() && !c->isShaded() ); }
}
//________________________________________________________________
int Decoration::borderSize(bool bottom) const
{
const int baseSize = settings()->smallSpacing();
if( m_internalSettings && (m_internalSettings->mask() & BorderSize ) )
{
switch (m_internalSettings->borderSize()) {
case InternalSettings::BorderNone: return 0;
case InternalSettings::BorderNoSides: return bottom ? qMax(4, baseSize) : 0;
default:
case InternalSettings::BorderTiny: return bottom ? qMax(4, baseSize) : baseSize;
case InternalSettings::BorderNormal: return baseSize*2;
case InternalSettings::BorderLarge: return baseSize*3;
case InternalSettings::BorderVeryLarge: return baseSize*4;
case InternalSettings::BorderHuge: return baseSize*5;
case InternalSettings::BorderVeryHuge: return baseSize*6;
case InternalSettings::BorderOversized: return baseSize*10;
}
} else {
switch (settings()->borderSize()) {
case KDecoration2::BorderSize::None: return 0;
case KDecoration2::BorderSize::NoSides: return bottom ? qMax(4, baseSize) : 0;
default:
case KDecoration2::BorderSize::Tiny: return bottom ? qMax(4, baseSize) : baseSize;
case KDecoration2::BorderSize::Normal: return baseSize*2;
case KDecoration2::BorderSize::Large: return baseSize*3;
case KDecoration2::BorderSize::VeryLarge: return baseSize*4;
case KDecoration2::BorderSize::Huge: return baseSize*5;
case KDecoration2::BorderSize::VeryHuge: return baseSize*6;
case KDecoration2::BorderSize::Oversized: return baseSize*10;
}
}
}
//________________________________________________________________
void Decoration::reconfigure()
{
m_internalSettings = SettingsProvider::self()->internalSettings( this );
// animation
m_animation->setDuration( m_internalSettings->animationsDuration() );
// borders
recalculateBorders();
// shadow
createShadow();
// size grip
if( hasNoBorders() && m_internalSettings->drawSizeGrip() ) createSizeGrip();
else deleteSizeGrip();
}
//________________________________________________________________
void Decoration::recalculateBorders()
{
auto c = client().data();
auto s = settings();
// left, right and bottom borders
const int left = isLeftEdge() ? 0 : borderSize();
const int right = isRightEdge() ? 0 : borderSize();
const int bottom = (c->isShaded() || isBottomEdge()) ? 0 : borderSize(true);
int top = 0;
if( hideTitleBar() ) top = bottom;
else {
QFontMetrics fm(s->font());
top += qMax(fm.height(), buttonHeight() );
// padding below
// extra pixel is used for the active window outline
const int baseSize = s->smallSpacing();
top += baseSize*Metrics::TitleBar_BottomMargin + 1;
// padding above
top += baseSize*TitleBar_TopMargin;
}
setBorders(QMargins(left, top, right, bottom));
// extended sizes
const int extSize = s->largeSpacing();
int extSides = 0;
int extBottom = 0;
if( hasNoBorders() )
{
if( !isMaximizedHorizontally() ) extSides = extSize;
if( !isMaximizedVertically() ) extBottom = extSize;
} else if( hasNoSideBorders() && !isMaximizedHorizontally() ) {
extSides = extSize;
}
setResizeOnlyBorders(QMargins(extSides, 0, extSides, extBottom));
}
//________________________________________________________________
void Decoration::createButtons()
{
m_leftButtons = new KDecoration2::DecorationButtonGroup(KDecoration2::DecorationButtonGroup::Position::Left, this, &Button::create);
m_rightButtons = new KDecoration2::DecorationButtonGroup(KDecoration2::DecorationButtonGroup::Position::Right, this, &Button::create);
updateButtonsGeometry();
}
//________________________________________________________________
void Decoration::updateButtonsGeometryDelayed()
{ QTimer::singleShot( 0, this, &Decoration::updateButtonsGeometry ); }
//________________________________________________________________
void Decoration::updateButtonsGeometry()
{
const auto s = settings();
// adjust button position
const int bHeight = captionHeight() + (isTopEdge() ? s->smallSpacing()*Metrics::TitleBar_TopMargin:0);
const int bWidth = buttonHeight();
const int verticalOffset = (isTopEdge() ? s->smallSpacing()*Metrics::TitleBar_TopMargin:0) + (captionHeight()-buttonHeight())/2;
foreach( const QPointer<KDecoration2::DecorationButton>& button, m_leftButtons->buttons() + m_rightButtons->buttons() )
{
button.data()->setGeometry( QRectF( QPoint( 0, 0 ), QSizeF( bWidth, bHeight ) ) );
static_cast<Button*>( button.data() )->setOffset( QPointF( 0, verticalOffset ) );
static_cast<Button*>( button.data() )->setIconSize( QSize( bWidth, bWidth ) );
}
// left buttons
if( !m_leftButtons->buttons().isEmpty() )
{
// spacing
m_leftButtons->setSpacing(s->smallSpacing()*Metrics::TitleBar_ButtonSpacing);
// padding
const int vPadding = isTopEdge() ? 0 : s->smallSpacing()*Metrics::TitleBar_TopMargin;
const int hPadding = s->smallSpacing()*Metrics::TitleBar_SideMargin;
if( isLeftEdge() )
{
// add offsets on the side buttons, to preserve padding, but satisfy Fitts law
auto button = static_cast<Button*>( m_leftButtons->buttons().front().data() );
button->setGeometry( QRectF( QPoint( 0, 0 ), QSizeF( bWidth + hPadding, bHeight ) ) );
button->setFlag( Button::FlagFirstInList );
button->setHorizontalOffset( hPadding );
m_leftButtons->setPos(QPointF(0, vPadding));
} else m_leftButtons->setPos(QPointF(hPadding + borderLeft(), vPadding));
}
// right buttons
if( !m_rightButtons->buttons().isEmpty() )
{
// spacing
m_rightButtons->setSpacing(s->smallSpacing()*Metrics::TitleBar_ButtonSpacing);
// padding
const int vPadding = isTopEdge() ? 0 : s->smallSpacing()*Metrics::TitleBar_TopMargin;
const int hPadding = s->smallSpacing()*Metrics::TitleBar_SideMargin;
if( isRightEdge() )
{
auto button = static_cast<Button*>( m_rightButtons->buttons().back().data() );
button->setGeometry( QRectF( QPoint( 0, 0 ), QSizeF( bWidth + hPadding, bHeight ) ) );
button->setFlag( Button::FlagLastInList );
m_rightButtons->setPos(QPointF(size().width() - m_rightButtons->geometry().width(), vPadding));
} else m_rightButtons->setPos(QPointF(size().width() - m_rightButtons->geometry().width() - hPadding - borderRight(), vPadding));
}
update();
}
//________________________________________________________________
void Decoration::paint(QPainter *painter, const QRect &repaintRegion)
{
// TODO: optimize based on repaintRegion
auto c = client().data();
auto s = settings();
// paint background
if( !c->isShaded() )
{
painter->fillRect(rect(), Qt::transparent);
painter->save();
painter->setRenderHint(QPainter::Antialiasing);
painter->setPen(Qt::NoPen);
painter->setBrush( c->color( c->isActive() ? ColorGroup::Active : ColorGroup::Inactive, ColorRole::Frame ) );
// clip away the top part
if( !hideTitleBar() ) painter->setClipRect(0, borderTop(), size().width(), size().height() - borderTop(), Qt::IntersectClip);
if( s->isAlphaChannelSupported() ) painter->drawRoundedRect(rect(), Metrics::Frame_FrameRadius, Metrics::Frame_FrameRadius);
else painter->drawRect( rect() );
painter->restore();
}
if( !hideTitleBar() ) paintTitleBar(painter, repaintRegion);
if( hasBorders() && !s->isAlphaChannelSupported() )
{
painter->save();
painter->setRenderHint(QPainter::Antialiasing, false);
painter->setBrush( Qt::NoBrush );
painter->setPen( c->isActive() ?
c->color( ColorGroup::Active, ColorRole::TitleBar ):
c->color( ColorGroup::Inactive, ColorRole::Foreground ) );
painter->drawRect( rect().adjusted( 0, 0, -1, -1 ) );
painter->restore();
}
}
//________________________________________________________________
void Decoration::paintTitleBar(QPainter *painter, const QRect &repaintRegion)
{
const auto c = client().data();
const QRect titleRect(QPoint(0, 0), QSize(size().width(), borderTop()));
if ( !titleRect.intersects(repaintRegion) ) return;
painter->save();
painter->setPen(Qt::NoPen);
// render a linear gradient on title area
if( c->isActive() && m_internalSettings->drawBackgroundGradient() )
{
const QColor titleBarColor( this->titleBarColor() );
QLinearGradient gradient( 0, 0, 0, titleRect.height() );
gradient.setColorAt(0.0, titleBarColor.lighter( 120 ) );
gradient.setColorAt(0.8, titleBarColor);
painter->setBrush(gradient);
} else {
painter->setBrush( titleBarColor() );
}
auto s = settings();
if( isMaximized() || !s->isAlphaChannelSupported() )
{
painter->drawRect(titleRect);
} else if( c->isShaded() ) {
painter->drawRoundedRect(titleRect, Metrics::Frame_FrameRadius, Metrics::Frame_FrameRadius);
} else {
painter->setClipRect(titleRect, Qt::IntersectClip);
// the rect is made a little bit larger to be able to clip away the rounded corners at the bottom and sides
painter->drawRoundedRect(titleRect.adjusted(
isLeftEdge() ? -Metrics::Frame_FrameRadius:0,
isTopEdge() ? -Metrics::Frame_FrameRadius:0,
isRightEdge() ? Metrics::Frame_FrameRadius:0,
Metrics::Frame_FrameRadius),
Metrics::Frame_FrameRadius, Metrics::Frame_FrameRadius);
}
const QColor outlineColor( this->outlineColor() );
if( !c->isShaded() && outlineColor.isValid() )
{
// outline
painter->setRenderHint( QPainter::Antialiasing, false );
painter->setBrush( Qt::NoBrush );
painter->setPen( outlineColor );
painter->drawLine( titleRect.bottomLeft(), titleRect.bottomRight() );
}
painter->restore();
// draw caption
painter->setFont(s->font());
painter->setPen( fontColor() );
const auto cR = captionRect();
const QString caption = painter->fontMetrics().elidedText(c->caption(), Qt::ElideMiddle, cR.first.width());
painter->drawText(cR.first, cR.second | Qt::TextSingleLine, caption);
// draw all buttons
m_leftButtons->paint(painter, repaintRegion);
m_rightButtons->paint(painter, repaintRegion);
}
//________________________________________________________________
int Decoration::buttonHeight() const
{
const int baseSize = settings()->gridUnit();
switch( m_internalSettings->buttonSize() )
{
case InternalSettings::ButtonTiny: return baseSize;
case InternalSettings::ButtonSmall: return baseSize*1.5;
default:
case InternalSettings::ButtonDefault: return baseSize*2;
case InternalSettings::ButtonLarge: return baseSize*2.5;
case InternalSettings::ButtonVeryLarge: return baseSize*3.5;
}
}
//________________________________________________________________
int Decoration::captionHeight() const
{ return hideTitleBar() ? borderTop() : borderTop() - settings()->smallSpacing()*(Metrics::TitleBar_BottomMargin + Metrics::TitleBar_TopMargin ) - 1; }
//________________________________________________________________
QPair<QRect,Qt::Alignment> Decoration::captionRect() const
{
if( hideTitleBar() ) return qMakePair( QRect(), Qt::AlignCenter );
else {
auto c = client().data();
const int leftOffset = m_leftButtons->buttons().isEmpty() ?
Metrics::TitleBar_SideMargin*settings()->smallSpacing():
m_leftButtons->geometry().x() + m_leftButtons->geometry().width() + Metrics::TitleBar_SideMargin*settings()->smallSpacing();
const int rightOffset = m_rightButtons->buttons().isEmpty() ?
Metrics::TitleBar_SideMargin*settings()->smallSpacing() :
size().width() - m_rightButtons->geometry().x() + Metrics::TitleBar_SideMargin*settings()->smallSpacing();
const int yOffset = settings()->smallSpacing()*Metrics::TitleBar_TopMargin;
const QRect maxRect( leftOffset, yOffset, size().width() - leftOffset - rightOffset, captionHeight() );
switch( m_internalSettings->titleAlignment() )
{
case InternalSettings::AlignLeft:
return qMakePair( maxRect, Qt::AlignVCenter|Qt::AlignLeft );
case InternalSettings::AlignRight:
return qMakePair( maxRect, Qt::AlignVCenter|Qt::AlignRight );
case InternalSettings::AlignCenter:
return qMakePair( maxRect, Qt::AlignCenter );
default:
case InternalSettings::AlignCenterFullWidth:
{
// full caption rect
const QRect fullRect = QRect( 0, yOffset, size().width(), captionHeight() );
QRect boundingRect( settings()->fontMetrics().boundingRect( c->caption()).toRect() );
// text bounding rect
boundingRect.setTop( yOffset );
boundingRect.setHeight( captionHeight() );
boundingRect.moveLeft( ( size().width() - boundingRect.width() )/2 );
if( boundingRect.left() < leftOffset ) return qMakePair( maxRect, Qt::AlignVCenter|Qt::AlignLeft );
else if( boundingRect.right() > size().width() - rightOffset ) return qMakePair( maxRect, Qt::AlignVCenter|Qt::AlignRight );
else return qMakePair(fullRect, Qt::AlignCenter);
}
}
}
}
//________________________________________________________________
void Decoration::createShadow()
{
if (!g_sShadow
||g_shadowSizeEnum != m_internalSettings->shadowSize()
|| g_shadowStrength != m_internalSettings->shadowStrength()
|| g_shadowColor != m_internalSettings->shadowColor())
{
g_shadowSizeEnum = m_internalSettings->shadowSize();
g_shadowStrength = m_internalSettings->shadowStrength();
g_shadowColor = m_internalSettings->shadowColor();
const CompositeShadowParams params = lookupShadowParams(g_shadowSizeEnum);
if (params.isNone()) {
g_sShadow.clear();
setShadow(g_sShadow);
return;
}
auto withOpacity = [](const QColor &color, qreal opacity) -> QColor {
QColor c(color);
c.setAlphaF(opacity);
return c;
};
const QSize boxSize = BoxShadowRenderer::calculateMinimumBoxSize(params.shadow1.radius)
.expandedTo(BoxShadowRenderer::calculateMinimumBoxSize(params.shadow2.radius));
BoxShadowRenderer shadowRenderer;
shadowRenderer.setBorderRadius(Metrics::Frame_FrameRadius + 0.5);
shadowRenderer.setBoxSize(boxSize);
shadowRenderer.setDevicePixelRatio(1.0); // TODO: Create HiDPI shadows?
const qreal strength = static_cast<qreal>(g_shadowStrength) / 255.0;
shadowRenderer.addShadow(params.shadow1.offset, params.shadow1.radius,
withOpacity(g_shadowColor, params.shadow1.opacity * strength));
shadowRenderer.addShadow(params.shadow2.offset, params.shadow2.radius,
withOpacity(g_shadowColor, params.shadow2.opacity * strength));
QImage shadowTexture = shadowRenderer.render();
QPainter painter(&shadowTexture);
painter.setRenderHint(QPainter::Antialiasing);
const QRect outerRect = shadowTexture.rect();
QRect boxRect(QPoint(0, 0), boxSize);
boxRect.moveCenter(outerRect.center());
// Mask out inner rect.
const QMargins padding = QMargins(
boxRect.left() - outerRect.left() - Metrics::Shadow_Overlap - params.offset.x(),
boxRect.top() - outerRect.top() - Metrics::Shadow_Overlap - params.offset.y(),
outerRect.right() - boxRect.right() - Metrics::Shadow_Overlap + params.offset.x(),
outerRect.bottom() - boxRect.bottom() - Metrics::Shadow_Overlap + params.offset.y());
const QRect innerRect = outerRect - padding;
painter.setPen(Qt::NoPen);
painter.setBrush(Qt::black);
painter.setCompositionMode(QPainter::CompositionMode_DestinationOut);
painter.drawRoundedRect(
innerRect,
Metrics::Frame_FrameRadius + 0.5,
Metrics::Frame_FrameRadius + 0.5);
// Draw outline.
painter.setPen(withOpacity(g_shadowColor, 0.2 * strength));
painter.setBrush(Qt::NoBrush);
painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
painter.drawRoundedRect(
innerRect,
Metrics::Frame_FrameRadius - 0.5,
Metrics::Frame_FrameRadius - 0.5);
painter.end();
g_sShadow = QSharedPointer<KDecoration2::DecorationShadow>::create();
g_sShadow->setPadding(padding);
g_sShadow->setInnerShadowRect(QRect(outerRect.center(), QSize(1, 1)));
g_sShadow->setShadow(shadowTexture);
}
setShadow(g_sShadow);
}
//_________________________________________________________________
void Decoration::createSizeGrip()
{
// do nothing if size grip already exist
if( m_sizeGrip ) return;
#if BREEZE_HAVE_X11
if( !QX11Info::isPlatformX11() ) return;
// access client
auto c = client().data();
if( !c ) return;
if( c->windowId() != 0 )
{
m_sizeGrip = new SizeGrip( this );
connect( c, &KDecoration2::DecoratedClient::maximizedChanged, this, &Decoration::updateSizeGripVisibility );
connect( c, &KDecoration2::DecoratedClient::shadedChanged, this, &Decoration::updateSizeGripVisibility );
connect( c, &KDecoration2::DecoratedClient::resizeableChanged, this, &Decoration::updateSizeGripVisibility );
}
#endif
}
//_________________________________________________________________
void Decoration::deleteSizeGrip()
{
if( m_sizeGrip )
{
m_sizeGrip->deleteLater();
m_sizeGrip = nullptr;
}
}
} // namespace
#include "breezedecoration.moc"