LCDDisplay.cpp

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/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 * Copyright(c) 2008-2024 The hydrogen development team [hydrogen-devel@lists.sourceforge.net]
 *
 * http://www.hydrogen-music.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) any later version.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
 
#include "LCDDisplay.h"
#include "../HydrogenApp.h"
#include "../Skin.h"
 
#include <core/Globals.h>
#include <core/Preferences/Theme.h>
 
LCDDisplay::LCDDisplay( QWidget * pParent, QSize size, bool bFixedFont, bool bIsActive )
 : QLineEdit( pParent )
 , m_size( size )
 , m_bFixedFont( bFixedFont )
 , m_bUseRedFont( false )
 , m_bIsActive( bIsActive )
{
        setReadOnly( ! bIsActive );
        setEnabled( bIsActive );
        if ( ! bIsActive ) {
                setFocusPolicy( Qt::NoFocus );
        }
        setAlignment( Qt::AlignCenter );
        setLocale( QLocale( QLocale::C, QLocale::AnyCountry ) );
 
        auto pPref = H2Core::Preferences::get_instance();
        
        // Derive a set of scaling-dependent font sizes on the basis of
        // the default font size determined by Qt itself.
        QFont currentFont = font();
        int nStepSize = 2;
 
        m_fontPointSizes.resize( 3 );
        switch ( pPref->getFontSize() ) {
        case H2Core::FontTheme::FontSize::Small:
                m_fontPointSizes[ 0 ] = currentFont.pointSize();
                break;
        case H2Core::FontTheme::FontSize::Large:
                m_fontPointSizes[ 0 ] = currentFont.pointSize() - 2 * nStepSize;
                break;
        default:
                m_fontPointSizes[ 0 ] = currentFont.pointSize() - nStepSize;
        }
        
        m_fontPointSizes[ 1 ] = m_fontPointSizes[ 0 ] + nStepSize;
        m_fontPointSizes[ 2 ] = m_fontPointSizes[ 0 ] + 2 * nStepSize;
        
        if ( ! size.isNull() ) {
                adjustSize();
                setFixedSize( size );
        }
 
        updateFont();
        updateStyleSheet();
 
        connect( HydrogenApp::get_instance(), &HydrogenApp::preferencesChanged, this, &LCDDisplay::onPreferencesChanged );
}
 
LCDDisplay::~LCDDisplay() {
}
 
void LCDDisplay::setUseRedFont( bool bUseRedFont ) {
        if ( bUseRedFont != m_bUseRedFont ) {
                m_bUseRedFont = bUseRedFont;
                updateStyleSheet();
        }
}
 
void LCDDisplay::setIsActive( bool bIsActive ) {
        m_bIsActive = bIsActive;
        
        update();
 
        setReadOnly( ! bIsActive );
        setEnabled( bIsActive );
        
        if ( ! bIsActive ) {
                setFocusPolicy( Qt::NoFocus );
        }
        else {
                setFocusPolicy( Qt::StrongFocus );
        }
}
 
void LCDDisplay::updateFont() {
        
        if ( m_bFixedFont ) {
                return;
        }
        
        auto pPref = H2Core::Preferences::get_instance();
 
        int nIndex = 1;
        if ( pPref->getFontSize() == H2Core::FontTheme::FontSize::Small ) {
                nIndex = 0;
        } else if ( pPref->getFontSize() == H2Core::FontTheme::FontSize::Large ) {
                nIndex = 2;
        }
 
        QFont newFont = font();
        newFont.setFamily( pPref->getLevel3FontFamily() );
        newFont.setPointSize( m_fontPointSizes[ nIndex ] );
        setFont( newFont );
}
 
void LCDDisplay::updateStyleSheet() {
        auto pPref = H2Core::Preferences::get_instance();
        
        QColor textColor, textColorActive;
        if ( m_bUseRedFont ) {
                textColor = pPref->getColorTheme()->m_buttonRedColor;
                textColorActive = pPref->getColorTheme()->m_buttonRedColor;
        } else {
                textColor = pPref->getColorTheme()->m_windowTextColor;
                textColorActive = pPref->getColorTheme()->m_widgetTextColor;
        }
        QColor backgroundColor = pPref->getColorTheme()->m_windowColor;
 
        QColor backgroundColorActive = pPref->getColorTheme()->m_widgetColor;
 
        QString sStyleSheet = QString( "\
QLineEdit:enabled { \
    color: %1; \
    background-color: %2; \
} \
QLineEdit:disabled { \
    color: %3; \
    background-color: %4; \
}" )
                .arg( textColorActive.name() )
                .arg( backgroundColorActive.name() )
                .arg( textColor.name() )
                .arg( backgroundColor.name() );
 
        // For fixed font displays we have to add the current font
        // parameters as well to avoid any inherited changes.
        if ( m_bFixedFont && font().pixelSize() > 0 ) {
                sStyleSheet.append( QString( "\
QLineEdit { \
    font-size: %1px; \
    font-family: %2; \
}" )
                                                        .arg( font().pixelSize() )
                                                        .arg( font().family() ) );
        }
 
        setStyleSheet( sStyleSheet );
}
 
void LCDDisplay::onPreferencesChanged( H2Core::Preferences::Changes changes ) {
        if ( changes & ( H2Core::Preferences::Changes::Colors |
                                         H2Core::Preferences::Changes::Font ) ) {
                updateFont();
                updateStyleSheet();
        }
}
 
void LCDDisplay::paintEvent( QPaintEvent *ev ) {
 
        QLineEdit::paintEvent( ev );
        updateFont();
}