/*  ColorPaletteButtonItem.cpp
 *
 *  Copyright (C) 2014  Jim Evins <evins@snaught.com>
 *
 *  This file is part of gLabels-qt.
 *
 *  gLabels-qt 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  gLabels-qt 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 gLabels-qt.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "ColorPaletteButtonItem.h"


#include <QPainter>
#include <QMouseEvent>


//
// Private Configuration Data
//
namespace
{
	const int     border = 4;
	const int     hBox = 25;
	const int     outlineWidthPixels = 1;
}


///
/// Constructor From Data
///
ColorPaletteButtonItem::ColorPaletteButtonItem( const QString& text, QWidget* parent )
	: QWidget(parent), mText(text), mHover(false)
{
	setSizePolicy( QSizePolicy( QSizePolicy::Preferred, QSizePolicy::Fixed ) );
	setMinimumSize( hBox+2*border+1, hBox+2*border+1 );
}


///
/// Paint Event
///
void ColorPaletteButtonItem::paintEvent( QPaintEvent* event )
{
	QPainter painter(this);

	//
	// Draw background
	//
	if ( mHover )
	{
		QLinearGradient gradient( 0, 0, 0, height() );
		gradient.setColorAt( 0, palette().color( QPalette::Highlight ).lighter() );
		gradient.setColorAt( 1, palette().color( QPalette::Highlight ) );
		painter.setBrush( QBrush( gradient ) );
			
		QPen pen( palette().color( QPalette::Text ) );
		pen.setWidth( outlineWidthPixels );
		painter.setPen( pen );

		painter.drawRect( 0, 0, width()-1, height()-1 );
	}

	//
	// Draw text
	//
	painter.setBrush( QBrush( Qt::NoBrush ) );

	if ( mHover )
	{
		painter.setPen( QPen( palette().color( QPalette::HighlightedText ) ) );
	}
	else
	{
		painter.setPen( QPen( palette().color( QPalette::Text ) ) );
	}

	QRect textRect( border, border, width()-2*border, hBox );

	painter.drawText( textRect, Qt::AlignLeft|Qt::AlignVCenter, mText );
}


///
/// Enter Event
///
void ColorPaletteButtonItem::enterEvent( QEvent* event )
{
	mHover = true;
	update();
}


///
/// Leave Event
///
void ColorPaletteButtonItem::leaveEvent( QEvent* event )
{
	mHover = false;
	update();
}

	
///
/// Mouse Press Event
///
void ColorPaletteButtonItem::mousePressEvent( QMouseEvent* event )
{
	emit activated();
}