root/trunk/gui/src/widgets/Rotary.cpp @ 1599

/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.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 "Rotary.h"
#include "LCD.h"
#include "../Skin.h"

#include <hydrogen/globals.h>

RotaryTooltip::RotaryTooltip( QPoint pos )
//  : QWidget( 0, "RotaryTooltip", Qt::WStyle_Customize| Qt::WStyle_NoBorder | Qt::WStyle_StaysOnTop| Qt::WX11BypassWM )
  : QWidget( 0, Qt::ToolTip )
{
        UNUSED( pos );

        m_pDisplay = new LCDDisplay( this, LCDDigit::SMALL_BLUE, 4);
        m_pDisplay->move( 0, 0 );
        resize( m_pDisplay->size() );

        QPalette defaultPalette;
        defaultPalette.setColor( QPalette::Background, QColor( 49, 53, 61 ) );
        this->setPalette( defaultPalette );

}


void RotaryTooltip::showTip( QPoint pos, QString sText )
{
        move( pos );
        m_pDisplay->setText( sText );
        show();
}

RotaryTooltip::~RotaryTooltip()
{
//      delete m_pDisplay;
}





///////////////////

QPixmap* Rotary::m_background_normal = NULL;
QPixmap* Rotary::m_background_center = NULL;


Rotary::Rotary( QWidget* parent, RotaryType type, QString sToolTip, bool bUseIntSteps, bool bUseValueTip )
 : QWidget( parent )
 , Object( "Rotary" )
 , m_bUseIntSteps( bUseIntSteps )
 , m_type( type )
 , m_fMin( 0.0 )
 , m_fMax( 1.0 )
 , m_bShowValueToolTip( bUseValueTip )
{
        setAttribute(Qt::WA_NoBackground);
        setToolTip( sToolTip );

        m_pValueToolTip = new RotaryTooltip( mapToGlobal( QPoint( 0, 0 ) ) );

        m_nWidgetWidth = 28;
        m_nWidgetHeight = 26;
        m_fValue = 0.0;

        if ( m_background_normal == NULL ) {
                m_background_normal = new QPixmap();
                if ( m_background_normal->load( Skin::getImagePath() + "/mixerPanel/rotary_images.png" ) == false ){
                        ERRORLOG( "Error loading pixmap" );
                }
        }
        if ( m_background_center == NULL ) {
                m_background_center = new QPixmap();
                if ( m_background_center->load( Skin::getImagePath() + "/mixerPanel/rotary_center_images.png" ) == false ){
                        ERRORLOG( "Error loading pixmap" );
                }
        }

        resize( m_nWidgetWidth, m_nWidgetHeight );
//      m_temp.resize( m_nWidgetWidth, m_nWidgetHeight );
}



Rotary::~ Rotary()
{
        delete m_pValueToolTip;
}



void Rotary::paintEvent( QPaintEvent* ev )
{
        UNUSED( ev );
        QPainter painter(this);

        float fRange = fabs( m_fMax ) + fabs( m_fMin );
        float fValue = fabs( m_fMin ) + m_fValue;

        int nFrame;
        if ( m_bUseIntSteps ) {
                nFrame = (int)( 63.0 * ( (int)fValue / fRange ) );
        }
        else {
                nFrame = (int)( 63.0 * ( fValue / fRange ) );
        }

//      INFOLOG( "\nrange: " + toString( fRange ) );
//      INFOLOG( "norm value: " + toString( fValue ) );
//      INFOLOG( "frame: " + toString( nFrame ) );

        if ( m_type == TYPE_NORMAL ) {

                int xPos = m_nWidgetWidth * nFrame;
                painter.drawPixmap( rect(), *m_background_normal, QRect( xPos, 0, m_nWidgetWidth, m_nWidgetHeight ) );
        }
        else {
                // the image is broken...
                if ( nFrame > 62 ) {
                        nFrame = 62;
                }
                int xPos = m_nWidgetWidth * nFrame;
                painter.drawPixmap( rect(), *m_background_center, QRect( xPos, 0, m_nWidgetWidth, m_nWidgetHeight ) );

        }
}



void Rotary::setValue( float fValue )
{
        if ( fValue == m_fValue ) {
                return;
        }

        if ( fValue < m_fMin ) {
                fValue = m_fMin;
        }
        else if ( fValue > m_fMax ) {
                fValue = m_fMax;
        }

        if ( fValue != m_fValue ) {
                m_fValue = fValue;
                update();
        }
}



void Rotary::mousePressEvent(QMouseEvent *ev)
{
        setCursor( QCursor( Qt::SizeVerCursor ) );

        m_fMousePressValue = m_fValue;
        m_fMousePressY = ev->y();

        if ( m_bShowValueToolTip ) {
                char tmp[20];
                sprintf( tmp, "%#.2f", m_fValue );
                m_pValueToolTip->showTip( mapToGlobal( QPoint( -38, 1 ) ), QString( tmp ) );
        }

        if ( ev->button() == Qt::LeftButton && ev->modifiers() == Qt::AltModifier ){
                MidiSenseWidget midiSense( this, true, this->getAction() );
                midiSense.exec();
        }
}




void Rotary::mouseReleaseEvent( QMouseEvent *ev )
{
        UNUSED( ev );

        setCursor( QCursor( Qt::ArrowCursor ) );
        m_pValueToolTip->hide();
}




void Rotary::wheelEvent ( QWheelEvent *ev )
{
        ev->accept();

        float stepfactor = 5.0; // course adjustment
        float delta = 1.0;

        // Control Modifier = fine adjustment
        if (ev->modifiers() == Qt::ControlModifier) {
                stepfactor = 1.0;
        }
        if ( !m_bUseIntSteps ) {
                float fRange = fabs( m_fMax ) + fabs( m_fMin );
                delta = fRange / 100.0;
        }
        if ( ev->delta() < 0 ) {
                delta = delta * -1.0;
        }
        setValue( getValue() + (delta * stepfactor) );
        emit valueChanged(this);
}



 void Rotary::mouseMoveEvent( QMouseEvent *ev ) {
        float fRange = fabs( m_fMax ) + fabs( m_fMin );

        float deltaY = ev->y() - m_fMousePressY;
        float fNewValue = ( m_fMousePressValue - ( deltaY / 100.0 * fRange ) );

        setValue( fNewValue );
        emit valueChanged(this);

        if ( m_bShowValueToolTip ) {
                char tmp[20];
                sprintf( tmp, "%#.2f", m_fValue );
                m_pValueToolTip->showTip( mapToGlobal( QPoint( -38, 1 ) ), QString( tmp ) );
        }
}



void Rotary::setMin( float fMin )
{
        m_fMin = fMin;
        update();
}

float Rotary::getMin()
{
        return m_fMin;
}



void Rotary::setMax( float fMax )
{
        m_fMax = fMax;
        update();
}


float Rotary::getMax()
{
        return m_fMax;
}