initial implementation for the playground/gradients added. This demo is
intended to compare how gradients are rendered with the different QSkinny backends to the raster paint engine
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fd5856cd50
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CONFIG += qskexample
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QT += widgets quickwidgets
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HEADERS +=
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SOURCES += \
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main.cpp
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linux {
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pedantic {
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QMAKE_CXXFLAGS += -isystem $$[QT_INSTALL_HEADERS]/QtQuickWidgets
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QMAKE_CXXFLAGS += -isystem $$[QT_INSTALL_HEADERS]/QtWidgets
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}
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}
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/******************************************************************************
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* QSkinny - Copyright (C) 2016 Uwe Rathmann
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* This file may be used under the terms of the 3-clause BSD License
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*****************************************************************************/
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#include <SkinnyNamespace.h>
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#include <QskControl.h>
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#include <QskGradient.h>
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#include <QWidget>
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#include <QApplication>
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#include <QQuickWidget>
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#include <QHBoxLayout>
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#include <QPainter>
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class BoxQsk: public QQuickWidget
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{
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public:
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BoxQsk( QWidget* parent = nullptr )
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: QQuickWidget( parent )
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{
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setSizePolicy( QSizePolicy::Ignored, QSizePolicy::Ignored );
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setContentsMargins( QMargins() );
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setResizeMode( QQuickWidget::SizeRootObjectToView );
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m_control = new QskControl();
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setContent( QUrl(), nullptr, m_control );
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}
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void showGradient( const QGradient& gradient )
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{
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QskGradient qskGradient( gradient );
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/*
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Eliminate the useless offsets that have been added to work around
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QGradients limitation to have stops at the same position
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*/
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auto stops = qskGradient.stops();
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for ( int i = 1; i < stops.count(); i++ )
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{
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if ( stops[i].position() - stops[i-1].position() < 1e-5 )
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stops[i].setPosition( stops[i-1].position() );
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}
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qskGradient.setStops( stops );
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m_control->setBackground( qskGradient );
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}
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private:
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QskControl* m_control;
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};
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class BoxQt: public QWidget
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{
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public:
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BoxQt( QWidget* parent = nullptr )
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: QWidget( parent )
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{
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setContentsMargins( QMargins() );
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setSizePolicy( QSizePolicy::Ignored, QSizePolicy::Ignored );
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}
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void showGradient( const QGradient& gradient )
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{
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m_gradient = gradient;
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m_gradient.setCoordinateMode( QGradient::ObjectMode );
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update();
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}
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protected:
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void paintEvent( QPaintEvent* ) override
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{
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QPainter painter( this );
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painter.fillRect( contentsRect(), m_gradient );
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}
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private:
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QGradient m_gradient;
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};
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class GradientBox: public QWidget
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{
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Q_OBJECT
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public:
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GradientBox( QWidget* parent = nullptr )
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: QWidget( parent )
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{
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m_qtBox = new BoxQt();
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m_qskBox = new BoxQsk();
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auto layout = new QHBoxLayout( this );
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layout->addWidget( m_qskBox );
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layout->addWidget( m_qtBox );
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showGradient( { Qt::green, Qt::red, Qt::yellow, Qt::cyan, Qt::darkCyan } );
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}
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void showGradient( const QVector< QColor >& colors )
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{
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const auto step = 1.0 / colors.size();
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QGradientStops stops;
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for ( int i = 0; i < colors.size(); i++ )
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{
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auto pos = i * step;
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if ( i > 0 )
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pos += 1e-6; // QGradient does not support stops at the same position
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stops += { pos, colors[i] };
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stops += { ( i + 1 ) * step, colors[i] };
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}
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QLinearGradient gradient( 0.0, 0.0, 0.0, 1.0 );
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gradient.setStops( stops );
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showGradient( gradient );
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}
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public Q_SLOTS:
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void showGradient( const QGradient& gradient )
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{
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m_qtBox->showGradient( gradient );
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m_qskBox->showGradient( gradient );
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}
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private:
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BoxQt* m_qtBox;
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BoxQsk* m_qskBox;
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};
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int main( int argc, char** argv )
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{
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QApplication app( argc, argv );
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Skinny::init(); // we need a skin
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GradientBox box;
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box.resize( 600, 600 );
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box.show();
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return app.exec();
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}
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#include "main.moc"
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@ -19,5 +19,6 @@ qtHaveModule(webengine) {
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qtHaveModule(quickwidgets) {
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SUBDIRS += \
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grids
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grids \
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gradients
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}
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