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/***************************************************************************
Copyright (C) 2011 - Olivier ROUITS <olivier.rouits@free.fr>
From Giuseppe Cigala code (qvumeter)
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.
***************************************************************************/
/**
* @file qjrmeter.cpp
* $Author$
* $Date$
* $Revision$
* @brief Implementation of QJRMeter class
*/
#include "qjrmeter.h"
#define QJRM_LEDHEIGHT 1
#define QJRM_LEDWIDTH 10
#define QJRM_BORDER 5
#define QJRM_LEDCOUNT (QJRM_MAXLEVEL - QJRM_MINLEVEL)
#define QJRM_LEDBARHEIGHT (QJRM_LEDCOUNT*(QJRM_LEDHEIGHT+1))
#define QJRM_WIDTH (2*QJRM_BORDER + QJRM_LEDWIDTH)
#define QJRM_HEIGHT (2*QJRM_BORDER + QJRM_LEDBARHEIGHT)
QJRMeter::QJRMeter(QWidget *parent) : QWidget(parent)
{
colorBack = QColor(60, 60, 60);
colorLevel = Qt::white;
colorHigh = Qt::red;
colorLow = Qt::green;
compLevel = -20;
leftLevel = QJRM_MINLEVEL;
rightLevel = QJRM_MINLEVEL;
}
void QJRMeter::paintEvent(QPaintEvent *)
{
paintBorder();
paintBar();
}
void QJRMeter::paintBorder()
{
QPainter painter(this);
QColor light = Qt::white;
QColor dark = colorBack.darker(140);
painter.setPen(QPen(colorBack, 3, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
// left round side
QLinearGradient gradL(0, 0, QJRM_BORDER, 0);
gradL.setColorAt(0, light);
gradL.setColorAt(1, colorBack);
gradL.setSpread(QGradient::PadSpread);
painter.setBrush(gradL);
QRect borderL(0, 0, QJRM_WIDTH/2, QJRM_HEIGHT);
painter.drawRect(borderL);
// right round side
QLinearGradient gradR(QJRM_WIDTH-QJRM_BORDER, 0, QJRM_WIDTH, 0);
gradR.setColorAt(0, colorBack);
gradR.setColorAt(1, dark);
gradR.setSpread(QGradient::PadSpread);
painter.setBrush(gradR);
QRect borderR(QJRM_WIDTH/2, 0, QJRM_WIDTH/2, QJRM_HEIGHT);
painter.drawRect(borderR);
}
void QJRMeter::paintBar()
{
QPainter painter(this);
QLinearGradient grad(0, QJRM_BORDER, 0, QJRM_HEIGHT-QJRM_BORDER);
grad.setColorAt(0, colorHigh);
grad.setColorAt(1, colorLow);
grad.setSpread(QGradient::PadSpread);
painter.setBrush(grad);
// draw color bar
QRect barL(QJRM_BORDER, QJRM_BORDER, QJRM_LEDWIDTH, QJRM_LEDBARHEIGHT);
painter.drawRect(barL);
// draw hiding bar
painter.setBrush(QColor(40, 40, 40));
int leftHeight = QJRM_LEDBARHEIGHT - (QJRM_LEDHEIGHT+1) * (leftLevel-QJRM_MINLEVEL);
int rightHeight = QJRM_LEDBARHEIGHT - (QJRM_LEDHEIGHT+1) * (rightLevel-QJRM_MINLEVEL);
QRect hideBarL(QJRM_BORDER, QJRM_BORDER, QJRM_LEDWIDTH/2, leftHeight );
painter.drawRect(hideBarL);
QRect hideBarR(QJRM_BORDER+QJRM_LEDWIDTH/2, QJRM_BORDER, QJRM_LEDWIDTH/2, rightHeight );
painter.drawRect(hideBarR);
// draw led intersections
painter.setPen(QPen(Qt::black, 1));
for (int i = 0; i < QJRM_LEDCOUNT; i++) {
int y = i*(QJRM_LEDHEIGHT+1) + QJRM_BORDER;
painter.drawLine(QJRM_BORDER, y, QJRM_BORDER + QJRM_LEDWIDTH, y);
}
// draw pause intersection
int y = QJRM_BORDER + QJRM_LEDBARHEIGHT - (QJRM_LEDHEIGHT+1) * (compLevel-QJRM_MINLEVEL);
painter.setPen(QPen(Qt::white, 1));
painter.drawLine(QJRM_BORDER, y, QJRM_BORDER + QJRM_LEDWIDTH, y);
}
void QJRMeter::setColorBack(QColor color)
{
colorBack = color;
update();
}
void QJRMeter::setColorLevel(QColor color)
{
colorLevel = color;
update();
}
void QJRMeter::setColorHigh(QColor color)
{
colorHigh = color;
update();
}
void QJRMeter::setColorLow(QColor color)
{
colorLow = color;
update();
}
void QJRMeter::setLeftLevel(double level)
{
if (level > QJRM_MAXLEVEL)
{
leftLevel = QJRM_MAXLEVEL;
update();
}
else if (level < QJRM_MINLEVEL)
{
leftLevel = QJRM_MINLEVEL;
update();
}
else
{
leftLevel = level;
update();
}
}
void QJRMeter::setRightLevel(double level)
{
if (level > QJRM_MAXLEVEL)
{
rightLevel = QJRM_MAXLEVEL;
update();
}
else if (level < QJRM_MINLEVEL)
{
rightLevel = QJRM_MINLEVEL;
update();
}
else
{
rightLevel = level;
update();
}
}
void QJRMeter::setCompLevel(double level)
{
if (level > QJRM_MAXLEVEL)
{
compLevel = QJRM_MAXLEVEL;
update();
}
else if (level < QJRM_MINLEVEL)
{
compLevel = QJRM_MINLEVEL;
update();
}
else
{
compLevel = level;
update();
}
}
QSize QJRMeter::minimumSizeHint() const
{
return QSize(QJRM_WIDTH, QJRM_HEIGHT);
}
QSize QJRMeter::sizeHint() const
{
return QSize(QJRM_WIDTH, QJRM_HEIGHT);
}
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