927d2dd51c
* IOT dashboard: Make light dimmer use arc renderer * use shadow * add value text * add warm and cold parts * add knob * handle input * only move knob when drawing along the arc * improve input handling * add tickmarks * add tickmarks node * clean up a bit * Update screenshot of IOT dashboard for github site
130 lines
3.7 KiB
C++
130 lines
3.7 KiB
C++
/******************************************************************************
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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 "RadialTickmarksNode.h"
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#include <QSGFlatColorMaterial>
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#include <QtMath>
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QSK_QT_PRIVATE_BEGIN
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#include <private/qsgnode_p.h>
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QSK_QT_PRIVATE_END
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static constexpr inline qreal qskTickFactor( QskScaleTickmarks::TickType type )
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{
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using TM = QskScaleTickmarks;
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return type == TM::MinorTick ? 0.7 : ( type == TM::MinorTick ? 0.85 : 1.0 );
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}
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class RadialTickmarksNodePrivate final : public QSGGeometryNodePrivate
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{
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public:
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RadialTickmarksNodePrivate()
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: geometry( QSGGeometry::defaultAttributes_Point2D(), 0 )
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{
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#if QT_VERSION >= QT_VERSION_CHECK( 5, 8, 0 )
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geometry.setDrawingMode( QSGGeometry::DrawLines );
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#else
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geometry.setDrawingMode( GL_LINES );
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#endif
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geometry.setVertexDataPattern( QSGGeometry::StaticPattern );
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}
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QSGGeometry geometry;
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QSGFlatColorMaterial material;
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QskIntervalF boundaries;
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QskScaleTickmarks tickmarks;
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QRectF rect;
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int lineWidth = 0;
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uint hash = 0;
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};
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RadialTickmarksNode::RadialTickmarksNode()
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: QSGGeometryNode( *new RadialTickmarksNodePrivate )
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{
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Q_D( RadialTickmarksNode );
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setGeometry( &d->geometry );
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setMaterial( &d->material );
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}
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RadialTickmarksNode::~RadialTickmarksNode()
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{
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}
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void RadialTickmarksNode::update(const QColor& color, const QRectF& rect,
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const QskArcMetrics& arcMetrics, const QskIntervalF& /*boundaries*/,
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const QskScaleTickmarks& tickmarks, int lineWidth,
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Qt::Orientation /*orientation*/ )
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{
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Q_D( RadialTickmarksNode );
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if( lineWidth != d->lineWidth )
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{
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d->lineWidth = lineWidth;
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d->geometry.setLineWidth( lineWidth );
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markDirty( QSGNode::DirtyGeometry );
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}
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const uint hash = tickmarks.hash( 17435 );
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if( ( hash != d->hash ) || ( rect != d->rect ) )
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{
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d->hash = hash;
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d->rect = rect;
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d->geometry.allocate( tickmarks.tickCount() * 2 );
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auto vertexData = d->geometry.vertexDataAsPoint2D();
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const auto center = rect.center();
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const auto radius = 0.5 * rect.width();
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const auto needleRadius = radius - arcMetrics.width();
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using TM = QskScaleTickmarks;
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for( int i = TM::MinorTick; i <= TM::MajorTick; i++ )
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{
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const auto tickType = static_cast< TM::TickType >( i );
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const auto ticks = tickmarks.ticks( tickType );
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const auto startAngle = arcMetrics.startAngle();
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const auto endAngle = startAngle + arcMetrics.spanAngle();
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for( const auto tick : ticks )
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{
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const qreal ratio = ( tick - startAngle ) / ( endAngle - startAngle );
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const qreal angle = ratio * ( endAngle - startAngle );
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const qreal cos = qFastCos( qDegreesToRadians( angle ) );
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const qreal sin = qFastSin( qDegreesToRadians( angle ) );
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const auto xStart = center.x() - radius * cos;
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const auto yStart = center.y() - radius * sin;
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const auto xEnd = center.x() - needleRadius * cos;
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const auto yEnd = center.y() - needleRadius * sin;
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vertexData[ 0 ].set( xStart, yStart );
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vertexData[ 1 ].set( xEnd, yEnd );
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vertexData += 2;
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}
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}
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d->geometry.markVertexDataDirty();
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markDirty( QSGNode::DirtyGeometry );
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}
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if ( color != d->material.color() )
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{
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d->material.setColor( color );
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markDirty( QSGNode::DirtyMaterial );
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}
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}
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