LCDCombo.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, see https://www.gnu.org/licenses
 *
 */
 
#include "LCDCombo.h"
 
#include "../HydrogenApp.h"
#include "../Skin.h"
 
#include <core/Globals.h>
 
 
LCDCombo::LCDCombo( QWidget *pParent, QSize size, bool bModifyOnChange )
        : QComboBox( pParent )
        , m_size( size )
        , m_bEntered( false )
        , m_bModifyOnChange( bModifyOnChange )
        , m_nMaxWidth( 0 )
        , m_bIsActive( true )
{
        setFocusPolicy( Qt::ClickFocus );
 
        if ( ! size.isNull() ) {
                adjustSize();
                setFixedSize( size );
        }
 
        updateStyleSheet();
 
        connect( HydrogenApp::get_instance(), &HydrogenApp::preferencesChanged, this, &LCDCombo::onPreferencesChanged );
        // Mark the current song modified if there was an user interaction
        // with the widget.
        connect( this, SIGNAL( activated(int) ), this, SLOT( handleIsModified(int) ) );
}
 
LCDCombo::~LCDCombo() {
}
 
void LCDCombo::handleIsModified( int ) {
        if ( m_bModifyOnChange ) {
                H2Core::Hydrogen::get_instance()->setIsModified( true );
        }
}
 
void LCDCombo::addItem( const QString& sText, const QVariant& userData ) {
        int nWidth =
                fontMetrics().size( Qt::TextSingleLine, sText ).width() *
                1.1 + // custom factor to ensure the text does fit
                view()->autoScrollMargin(); // width of the scrollbar
 
        if ( nWidth > m_nMaxWidth ) {
                m_nMaxWidth = nWidth;
        }
 
        QComboBox::addItem( sText, userData );
}
 
void LCDCombo::setIsActive( bool bIsActive ) {
        m_bIsActive = bIsActive;
        
        update();
        
        setEnabled( bIsActive );
}
 
void LCDCombo::showPopup() {
        if ( m_nMaxWidth > view()->sizeHint().width() ) {
                view()->setMinimumWidth( m_nMaxWidth );
        }
        
        QComboBox::showPopup();
}
 
void LCDCombo::updateStyleSheet() {
 
        auto pPref = H2Core::Preferences::get_instance();
 
 
        QColor widgetColor = pPref->getColorTheme()->m_widgetColor;
        QColor widgetTextColor = pPref->getColorTheme()->m_widgetTextColor;
        QColor widgetInactiveColor = 
                Skin::makeWidgetColorInactive( widgetColor );
        QColor widgetTextInactiveColor =
                Skin::makeTextColorInactive( widgetTextColor );
        
        setStyleSheet( QString( "\
QComboBox:enabled { \
    color: %1; \
    background-color: %2; \
    font-family: %3; \
    font-size: %4; \
} \
QComboBox:disabled { \
    color: %5; \
    background-color: %6; \
    font-family: %3; \
    font-size: %4; \
} \
QComboBox QAbstractItemView { \
    color: %1; \
    background-color: #babfcf; \
}")
                                   .arg( widgetTextColor.name() )
                                   .arg( widgetColor.name() )
                                   .arg( pPref->getLevel3FontFamily() )
                                   .arg( getPointSize( pPref->getFontSize() ) )
                                   .arg( widgetTextInactiveColor.name() )
                                   .arg( widgetInactiveColor.name() ) );
}
 
void LCDCombo::onPreferencesChanged( H2Core::Preferences::Changes changes ) {
        
        if ( changes & ( H2Core::Preferences::Changes::Colors |
                                         H2Core::Preferences::Changes::Font ) ) {
                updateStyleSheet();
        }
}
 
void LCDCombo::paintEvent( QPaintEvent *ev ) {
 
        auto pPref = H2Core::Preferences::get_instance();
        
        QComboBox::paintEvent( ev );
 
        if ( m_bEntered || hasFocus() ) {
                QPainter painter(this);
        
                QColor colorHighlightActive;
                if ( m_bIsActive ) {
                        colorHighlightActive = pPref->getColorTheme()->m_highlightColor;
                } else {
                        colorHighlightActive = pPref->getColorTheme()->m_lightColor;
                }
 
                // If the mouse is placed on the widget but the user hasn't
                // clicked it yet, the highlight will be done more transparent to
                // indicate that keyboard inputs are not accepted yet.
                if ( ! hasFocus() ) {
                        colorHighlightActive.setAlpha( 150 );
                }
        
                painter.fillRect( 0, m_size.height() - 2, m_size.width(), 2, colorHighlightActive );
        }
}
 
void LCDCombo::enterEvent( QEvent* ev ) {
        QComboBox::enterEvent( ev );
        m_bEntered = true;
}
 
void LCDCombo::leaveEvent( QEvent* ev ) {
        QComboBox::leaveEvent( ev );
        m_bEntered = false;
}
 
void LCDCombo::setSize( QSize size ) {
        m_size = size;
        
        setFixedSize( size );
        adjustSize();
}