//
// QasTools: Dektop toolset for the Linux sound system ALSA
//
// License: See COPYING file that comes with this source distribution
//
// Author: Sebastian Holtermann <sebholt@xwmw.org>, (C) 2012
//

#include "slider_status_widget.hpp"

#include "wdg/sliders_pad.hpp"
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QFontMetrics>
#include <QSpacerItem>
#include <QPushButton>
#include <QMenu>
#include <QAction>
#include <QContextMenuEvent>

#include <iostream>


namespace MWdg
{


Slider_Status_Widget::Slider_Status_Widget (
	QWidget * parent_n ) :
QWidget ( parent_n, Qt::Tool ),
_sliders_pad ( 0 )
{
	setWindowTitle ( tr ( "Slider value" ) );

	QFont fnt_title ( _volume_title.font() );
	fnt_title.setWeight ( QFont::Bold );

	const Qt::Alignment align_lc ( Qt::AlignLeft | Qt::AlignVCenter );
	const Qt::Alignment align_rc ( Qt::AlignRight | Qt::AlignVCenter );
	const Qt::Alignment align_cc ( Qt::AlignHCenter | Qt::AlignVCenter );

	_lbl_value.setText ( tr ( "Value" ) );
	_lbl_value.setFont ( fnt_title );

	_lbl_max.setText ( tr ( "Max." ) );
	_lbl_max.setToolTip ( tr ( "Maximum" ) );
	_lbl_max.setFont ( fnt_title );

	_lbl_min.setText ( tr ( "Min." ) );
	_lbl_min.setFont ( fnt_title );
	_lbl_min.setToolTip ( tr ( "Minimum" ) );


	// Volume
	// Volume label
	_volume_title.setFont ( fnt_title );
	_volume_title.setText ( tr ( "Volume" ) );

	_volume_value.setSingleStep ( 1 );
	_volume_value.setKeyboardTracking ( false );

	// Volume value
	_volume_value.setToolTip ( tr ( "Current volume" ) );
	connect ( &_volume_value, SIGNAL ( valueChanged ( int ) ),
		this, SLOT ( volume_value_changed ( int ) ) );

	// Volume range
	_volume_max.setAlignment ( align_cc );
	_volume_max.setToolTip ( tr ( "Volume maximum" ) );
	_volume_max.setTextInteractionFlags ( Qt::TextSelectableByMouse );
	_volume_max.set_min_text ( volume_string ( -65000 ) );

	_volume_min.setAlignment ( align_cc );
	_volume_min.setToolTip ( tr ( "Volume minimum" ) );
	_volume_min.setTextInteractionFlags ( Qt::TextSelectableByMouse );
	_volume_min.set_min_text ( volume_string ( -65000 ) );


	// Decibel
	// Decibel label
	_db_title.setFont ( fnt_title );
	_db_title.setText ( tr ( "Decibel" ) );

	// Decibel value
	_db_value.setButtonSymbols ( QAbstractSpinBox::NoButtons );
	_db_value.setSingleStep ( 0 );
	_db_value.setKeyboardTracking ( false );
	_db_value.setToolTip ( tr ( "Current Decibel value" ) );

	connect ( &_db_value, SIGNAL ( valueChanged ( double ) ),
		this, SLOT ( db_value_changed ( double ) ) );

	// Decibel range
	_db_max.setAlignment ( align_rc );
	_db_max.set_min_text ( db_string ( -99.99 ) );
	_db_max.setToolTip ( tr ( "Decibel maximum" ) );
	_db_max.setTextInteractionFlags ( Qt::TextSelectableByMouse );

	_db_min.setAlignment ( align_rc );
	_db_min.set_min_text ( db_string ( -99.99 ) );
	_db_min.setToolTip ( tr ( "Decibel minimum" ) );
	_db_min.setTextInteractionFlags ( Qt::TextSelectableByMouse );


	// Element name
	_elem_name.setFont ( fnt_title );
	_elem_name.setToolTip ( tr ( "Element name" ) );


	// Layout
	{
		QVBoxLayout * lay_vbox ( new QVBoxLayout );

		lay_vbox->addWidget ( &_elem_name );

		{
			QGridLayout * lay_grid ( new QGridLayout );
			lay_grid->setContentsMargins ( 0, 0, 0, 0 );

			const int fnt_w ( fontMetrics().averageCharWidth() );
			const int fnt_h ( fontMetrics().height() );
			QSpacerItem * spacer[8];
			for ( unsigned int ii=0; ii < 8; ++ii ) {
				spacer[ii] = new QSpacerItem ( fnt_w, fnt_h );
			}

			unsigned int sp_idx ( 0 );
			unsigned int row ( 0 );
			unsigned int col ( 0 );
			++col;
			lay_grid->addItem ( spacer[sp_idx++], row, col++ );
			lay_grid->addWidget ( &_volume_title, row, col++ );
			lay_grid->addItem ( spacer[sp_idx++], row, col++ );
			lay_grid->addWidget ( &_db_title,     row, col++ );

			++row;
			col = 0;
			lay_grid->addWidget ( &_lbl_value,    row, col++ );
			lay_grid->addItem ( spacer[sp_idx++], row, col++ );
			lay_grid->addWidget ( &_volume_value, row, col++ );
			lay_grid->addItem ( spacer[sp_idx++], row, col++ );
			lay_grid->addWidget ( &_db_value,     row, col++ );

			++row;
			col = 0;
			lay_grid->addWidget ( &_lbl_max,      row, col++ );
			lay_grid->addItem ( spacer[sp_idx++], row, col++ );
			lay_grid->addWidget ( &_volume_max,   row, col++ );
			lay_grid->addItem ( spacer[sp_idx++], row, col++ );
			lay_grid->addWidget ( &_db_max,       row, col++ );

			++row;
			col = 0;
			lay_grid->addWidget ( &_lbl_min,      row, col++ );
			lay_grid->addItem ( spacer[sp_idx++], row, col++ );
			lay_grid->addWidget ( &_volume_min,   row, col++ );
			lay_grid->addItem ( spacer[sp_idx++], row, col++ );
			lay_grid->addWidget ( &_db_min,       row, col++ );

			QBoxLayout * lay_hbox ( new QHBoxLayout() );
			lay_hbox->setContentsMargins ( 0, 0, 0, 0 );
			lay_hbox->addLayout ( lay_grid );
			lay_hbox->addStretch ( 1 );

			lay_vbox->addLayout ( lay_hbox );
		}

		lay_vbox->addStretch ( 1 );

		setLayout ( lay_vbox );
	}
}


Slider_Status_Widget::~Slider_Status_Widget ( )
{
}


void
Slider_Status_Widget::set_sliders_pad (
	::Wdg::Sliders_Pad * pad_n )
{
	if ( sliders_pad() != 0 ) {
		disconnect ( sliders_pad(), 0, this, 0 );
	}

	_sliders_pad = pad_n;

	if ( sliders_pad() != 0 ) {
		connect ( sliders_pad(), SIGNAL ( sig_focus_changed() ),
			this, SLOT ( slider_focus_changed() ) );
	}
}


void
Slider_Status_Widget::slider_focus_changed ( )
{
	//::std::cout << "Slider_Status_Widget::slider_focus_changed" << "\n";

	if ( sliders_pad() != 0 ) {
		if ( sliders_pad()->focus_info().has_focus ) {
			this->select_slider (
				sliders_pad()->focus_info().group_idx,
				sliders_pad()->focus_info().column_idx );
		}
	}
}


void
Slider_Status_Widget::volume_value_changed (
	int value_n )
{
	this->elem_set_volume ( value_n );
}


void
Slider_Status_Widget::db_value_changed (
	double value_n )
{
	const long dB_long ( value_n * 100.0 );
	this->elem_set_nearest_dB ( dB_long );
	update_values();
}


void
Slider_Status_Widget::mixer_values_changed ( )
{
	update_values();
}


void
Slider_Status_Widget::update_values ( )
{
	QString txt ( "%1" );
	{
		const long val ( this->elem_volume_value() );
		_volume_value.blockSignals ( true );
		_volume_value.setValue ( val );
		_volume_value.blockSignals ( false );
	}

	if ( this->elem_has_dB() ) {
		const double val ( this->elem_dB_value() / 100.0 );
		_db_value.blockSignals ( true );
		_db_value.setValue ( val );
		_db_value.blockSignals ( false );
	}
}


void
Slider_Status_Widget::setup_values ( )
{
	QString txt_special;
	QString txt_max;
	QString txt_min;

	long vol_min;
	long vol_max;

	bool has_vol ( this->elem_has_volume() );
	bool has_db ( this->elem_has_dB() );

	_elem_name.setText ( this->elem_name() );


	// Volume
	_volume_title.setEnabled ( has_vol );
	_volume_value.setEnabled ( has_vol );
	_volume_max.setEnabled ( has_vol );
	_volume_min.setEnabled ( has_vol );

	if ( has_vol ) {
		vol_min = this->elem_volume_min();
		vol_max = this->elem_volume_max();

		txt_special = QString();
		txt_max = volume_string ( vol_max );
		txt_min = volume_string ( vol_min );
	} else {
		vol_min = 0;
		vol_max = 0;

		txt_special = " ";
		txt_max = "";
		txt_min = "";
	}

	_volume_value.blockSignals ( true );
	_volume_value.setSpecialValueText ( txt_special );
	_volume_value.setRange ( vol_min, vol_max );
	_volume_value.setValue ( vol_min ); // To show the special text on demand
	_volume_value.blockSignals ( false );

	_volume_max.setText ( txt_max );
	_volume_min.setText ( txt_min );


	// Decibel

	_db_title.setEnabled ( has_db );
	_db_value.setEnabled ( has_db );
	_db_max.setEnabled ( has_db );
	_db_min.setEnabled ( has_db );

	if ( has_db ) {
		vol_min = this->elem_dB_min();
		vol_max = this->elem_dB_max();

		txt_special = QString();
		txt_max = db_string ( vol_max / 100.0 );
		txt_min = db_string ( vol_min / 100.0 );
	} else {
		vol_min = -9900;
		vol_max = 0;

		txt_special = " ";
		txt_max = "";
		txt_min = "";
	}

	_db_value.blockSignals ( true );
	_db_value.setSpecialValueText ( txt_special );
	_db_value.setRange ( vol_min / 100.0, vol_max / 100.0 );
	_db_value.setValue ( vol_min / 100.0 ); // To show the special text on demand
	_db_value.blockSignals ( false );

	_db_max.setText ( txt_max );
	_db_min.setText ( txt_min );

	updateGeometry();
}


void
Slider_Status_Widget::contextMenuEvent (
	QContextMenuEvent * event_n )
{
	QMenu cmenu ( this );

	QAction * act_close ( cmenu.addAction ( tr ( "Close slider value display" ) ) );
	if ( QIcon::hasThemeIcon ( "window-close" ) ) {
		act_close->setIcon ( QIcon::fromTheme ( "window-close" ) );
	}
	connect ( act_close, SIGNAL ( triggered ( bool ) ),
		this, SLOT ( close() ) );

	cmenu.exec ( event_n->globalPos() );
}


} // End of namespace