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swflipdigit.cpp
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329
swflipdigit.cpp
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/***************************************************************************
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source::worx raDIYo
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Copyright © 2020-2022 c.holzheuer
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chris@sourceworx.org
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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***************************************************************************/
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/**
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* contains copy-writen material from qt example code:
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* @see shaped clock example
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* @see embedded/flipdigits example
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*
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* **/
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#include <QWidget>
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#include <QtCore>
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#include <QPainter>
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#include <QFontDatabase>
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#include <QColor>
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#include <QPen>
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#include <swflipdigit.h>
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#include <raDIYoglobals.h>
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SWFlipDigit::SWFlipDigit( QWidget *parent )
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: QWidget( parent ),
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_transition( Slide )
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{
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setFocusPolicy( Qt::StrongFocus );
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//setAttribute( Qt::WA_OpaquePaintEvent, true );
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setAttribute( Qt::WA_NoSystemBackground, true );
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connect(&_animator, SIGNAL(frameChanged(int)), SLOT(update()));
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_animator.setFrameRange( 0, 100 );
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_animator.setDuration( 600 );
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_animator.setEasingCurve( ( QEasingCurve( QEasingCurve::InOutQuad ) ) );
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_fontFamily = SWDEFAULTFONT;
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}
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SWFlipDigit::~SWFlipDigit()
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{
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}
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void SWFlipDigit::setTransition( FlipMode tr)
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{
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_transition = tr;
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}
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SWFlipDigit::FlipMode SWFlipDigit::transition() const
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{
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return _transition;
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}
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void SWFlipDigit::setValue( int value )
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{
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if( _value != value )
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{
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_value = qBound( _rangeFrom, value, _rangeTo );
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preparePixmap();
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update();
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}
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}
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void SWFlipDigit::flipTo( int n )
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{
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if( _value != n )
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{
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_value = qBound( _rangeFrom, n, _rangeTo );
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_lastPixmap = _pixmap;
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preparePixmap();
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_animator.stop();
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_animator.start();
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}
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}
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void SWFlipDigit::drawFrame( QPainter* painter, const QRect &rect )
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{
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painter->setPen(Qt::NoPen);
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QLinearGradient gradient( rect.topLeft(), rect.bottomLeft() );
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gradient.setColorAt(0.00, QColor(245, 245, 245) );
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gradient.setColorAt(0.49, QColor(192, 192, 192) );
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gradient.setColorAt(0.51, QColor(245, 245, 245) );
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gradient.setColorAt(1.00, QColor(192, 192, 192) );
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painter->setBrush( gradient );
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QRect r = rect;
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painter->drawRoundedRect( r, 15, 15, Qt::RelativeSize );
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r.adjust( 1, 4, -1, -4 );
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painter->setPen (QColor( 181, 181, 181 ) );
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painter->setBrush( Qt::NoBrush );
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painter->drawRoundedRect( r, 15, 15, Qt::RelativeSize );
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painter->setPen( QColor( 159, 159, 159 ));
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int y = rect.top() + rect.height() / 2 - 1;
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painter->drawLine( rect.left(), y, rect.right(), y );
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}
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QPixmap SWFlipDigit::drawDigits( int digit, const QRect &rect )
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{
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QString strDigit = QString::number( digit );
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if( strDigit.length() == 1 )
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strDigit.prepend( '0' );
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// FIX!
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QFont font;
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font.setFamily( _fontFamily );
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int fontHeight = _scaleFactor * _fontScale * rect.height();
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font.setPixelSize( fontHeight );
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//font.setBold( true );
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QPixmap pixmap( rect.size() * _scaleFactor );
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pixmap.fill( Qt::transparent );
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QLinearGradient gradient( QPoint( 0, 0 ), QPoint( 0, pixmap.height() ) );
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gradient.setColorAt( 0.00, QColor(128, 128, 128) );
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gradient.setColorAt( 0.49, QColor(64, 64, 64) );
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gradient.setColorAt( 0.51, QColor(128, 128, 128) );
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gradient.setColorAt( 1.00, QColor(16, 16, 16) );
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QPainter painter;
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painter.begin( &pixmap );
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painter.setFont( font );
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QPen pen;
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pen.setBrush( QBrush( gradient ) );
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painter.setPen( pen );
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QRect pos = pixmap.rect();
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pos.adjust( 0, -100, 0, 0 );
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painter.drawText( pos, Qt::AlignCenter, strDigit );
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painter.end();
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return pixmap.scaledToWidth( width(), Qt::SmoothTransformation );
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}
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void SWFlipDigit::preparePixmap()
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{
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_pixmap = QPixmap( size() );
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_pixmap.fill(Qt::transparent);
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QPainter painter( &_pixmap );
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painter.drawPixmap( 0, 0, drawDigits( _value, rect() ) );
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}
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void SWFlipDigit::resizeEvent( QResizeEvent* )
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{
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preparePixmap();
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update();
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}
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void SWFlipDigit::paintStatic()
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{
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QPainter painter( this );
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drawFrame( &painter, rect() );
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painter.drawPixmap( 0, 0, _pixmap );
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}
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void SWFlipDigit::paintSlide()
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{
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QPainter painter( this );
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painter.fillRect( rect(), Qt::black );
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//int pad = SWPADWIDTH;
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//QRect fr = rect().adjusted( pad, pad, -pad, -pad );
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drawFrame( &painter, rect() );
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painter.setClipRect( rect() );
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int y = height() * _animator.currentFrame() / 100;
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painter.drawPixmap( 0, y, _lastPixmap );
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painter.drawPixmap( 0, y - height(), _pixmap );
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}
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void SWFlipDigit::paintFlip()
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{
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QPainter painter( this );
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painter.setRenderHint( QPainter::SmoothPixmapTransform, true );
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painter.setRenderHint( QPainter::Antialiasing, true );
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int hw = width() / 2;
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int hh = height() / 2;
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// behind is the new pixmap
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// int pad = SWPADWIDTH;
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QRect fr = rect();//.adjusted( pad, pad, -pad, -pad );
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drawFrame( &painter, fr );
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painter.drawPixmap( 0, 0, _pixmap );
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int index = _animator.currentFrame();
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if( index <= 50 )
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{
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// the top part of the old pixmap is flipping
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int angle = -180 * index / 100;
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QTransform transform;
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transform.translate(hw, hh);
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transform.rotate( angle, Qt::XAxis );
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painter.setTransform(transform);
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drawFrame( &painter, fr.adjusted(-hw, -hh, -hw, -hh ) );
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painter.drawPixmap(-hw, -hh, _lastPixmap);
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// the bottom part is still the old pixmap
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painter.resetTransform();
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painter.setClipRect(0, hh, width(), hh);
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drawFrame( &painter, fr );
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painter.drawPixmap( 0, 0, _lastPixmap );
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return;
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}
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painter.setClipRect( 0, hh, width(), hh );
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// the bottom part is still the old pixmap
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drawFrame( &painter, fr );
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painter.drawPixmap(0, 0, _lastPixmap );
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// the bottom part of the new pixmap is flipping
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int angle = 180 - 180 * _animator.currentFrame() / 100;
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QTransform transform;
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transform.translate( hw, hh);
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transform.rotate( angle, Qt::XAxis );
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painter.setTransform( transform );
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drawFrame( &painter, fr.adjusted( -hw, -hh, -hw, -hh ) );
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painter.drawPixmap( -hw, -hh, _pixmap );
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}
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void SWFlipDigit::paintRotate()
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{
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QPainter p(this);
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//int pad = SWPADWIDTH;
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QRect fr = rect();//.adjusted(pad, pad, -pad, -pad);
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drawFrame(&p, fr);
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p.setClipRect(fr);
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int angle1 = -180 * _animator.currentFrame() / 100;
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int angle2 = 180 - 180 * _animator.currentFrame() / 100;
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int angle = ( _animator.currentFrame() <= 50 ) ? angle1 : angle2;
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QPixmap pix = ( _animator.currentFrame() <= 50 ) ? _lastPixmap : _pixmap;
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QTransform transform;
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transform.translate( width() / 2, height() / 2 );
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transform.rotate( angle, Qt::XAxis );
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p.setTransform(transform);
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p.setRenderHint( QPainter::SmoothPixmapTransform, true );
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p.drawPixmap(-width() / 2, -height() / 2, pix);
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}
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void SWFlipDigit::paintEvent( QPaintEvent* )
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{
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QPainter painter( this );
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painter.fillRect( rect(), Qt::black );
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if( _animator.state() == QTimeLine::Running )
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{
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if(_transition == Slide )
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paintSlide();
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if(_transition == Flip )
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paintFlip();
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if(_transition == Rotate )
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paintRotate();
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}
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else
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{
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paintStatic();
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}
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drawMark( this );
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}
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void SWFlipDigit::onDialDeltaChanged( int delta )
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{
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// gültigkeit sicherstellen
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int newval = _value + delta;
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newval = qBound( _rangeFrom, newval, _rangeTo );
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if( _value == newval )
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return;
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setValue( newval );
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update();
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}
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