//---------------------------------------------------------------------------
/*
QtLedWidget, Qt widget for displaying the Led class
Copyright (C) 2011 Richel Bilderbeek
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 3 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 <http://www.gnu.org/licenses/>.
*/
//---------------------------------------------------------------------------
//From http://www.richelbilderbeek.nl/CppQtLedWidget.htm
//---------------------------------------------------------------------------
#include <cassert>
#include <iostream>
//---------------------------------------------------------------------------
#include <boost/numeric/conversion/cast.hpp>
//---------------------------------------------------------------------------
#include <QPainter>
//---------------------------------------------------------------------------
#include "led.h"
#include "qtledwidget.h"
//#include "trace.h"
//---------------------------------------------------------------------------
QtLedWidget::QtLedWidget(
QWidget *parent,
const double intensity,
const unsigned char red,
const unsigned char green,
const unsigned char blue)
: QWidget(parent),
m_widget(new LedWidget(intensity,red,green,blue))
{
assert(m_widget);
m_widget->GetLed()->m_signal_color_changed.connect(
boost::bind(
&QtLedWidget::repaint,
this));
m_widget->GetLed()->m_signal_intensity_changed.connect(
boost::bind(
&QtLedWidget::repaint,
this));
m_widget->m_signal_geometry_changed.connect(
boost::bind(
&QtLedWidget::OnResize,
this));
this->GetWidget()->SetGeometry(Rect(0,0,100,100));
this->GetWidget()->GetLed()->SetColor(255,124,0);
this->GetWidget()->GetLed()->SetIntensity(0.99);
}
//---------------------------------------------------------------------------
///Draw a Led from a Led
void QtLedWidget::DrawLed(
QPainter& painter,
const int left, const int top,
const int width, const int height,
const Led * const led)
{
const int red = boost::numeric_cast<int>(led->GetRed());
const int green = boost::numeric_cast<int>(led->GetGreen());
const int blue = boost::numeric_cast<int>(led->GetBlue());
const double intensity = led->GetIntensity();
//Fraction red/green/blue
const double fR = static_cast<double>(red ) / 255.0;
const double fG = static_cast<double>(green) / 255.0;
const double fB = static_cast<double>(blue ) / 255.0;
{
//Draw circle and major surface
const double maxBrightness = 0.66 * 255.0;
const double minBrightness = 0.25 * maxBrightness;
const int r = static_cast<int>(
minBrightness + (fR * intensity * (maxBrightness - minBrightness) ) );
const int g = static_cast<int>(
minBrightness + (fG * intensity * (maxBrightness - minBrightness) ) );
const int b = static_cast<int>(
minBrightness + (fB * intensity * (maxBrightness - minBrightness) ) );
assert( r >= 0 ); assert( r < 256);
assert( g >= 0 ); assert( g < 256);
assert( b >= 0 ); assert( b < 256);
const int pen_width = 1 + (std::min(width,height) / 25);
{
QPen pen = painter.pen();
pen.setWidth(pen_width);
pen.setColor(QColor(0,0,0));
painter.setPen(pen);
}
painter.setBrush(QBrush(QColor(r,g,b)));
painter.drawEllipse(
left + pen_width,
top + pen_width,
width - (2 * pen_width),
height - (2 * pen_width));
}
{
//Draw topleft smaller lighter surface
const double maxBrightness = 1.00 * 255.0;
const double minBrightness = 0.25 * maxBrightness;
const int r = static_cast<int>(
minBrightness + (fR * intensity * (maxBrightness - minBrightness) ) );
const int g = static_cast<int>(
minBrightness + (fG * intensity * (maxBrightness - minBrightness) ) );
const int b = static_cast<int>(
minBrightness + (fB * intensity * (maxBrightness - minBrightness) ) );
assert( r >= 0 ); assert( r < 256);
assert( g >= 0 ); assert( g < 256);
assert( b >= 0 ); assert( b < 256);
const int x = left + (width / 2) - (0.707 * static_cast<double>(width ) * 0.5);
const int y = top + (height / 2) - (0.707 * static_cast<double>(height) * 0.5);
const int w = (0.707 * static_cast<double>(width ) * 0.5);
const int h = (0.707 * static_cast<double>(height) * 0.5);
{
QPen pen = painter.pen();
pen.setWidth(1);
pen.setColor(QColor(r,g,b));
painter.setPen(pen);
}
painter.setBrush(QBrush(QColor(r,g,b)));
painter.drawEllipse(x,y,w,h);
}
{
//Draw bottomright smaller lighter surface
const double maxBrightness = 0.33 * 255.0;
const double minBrightness = 0.25 * maxBrightness;
const int r = static_cast<int>(
minBrightness + (fR * intensity * (maxBrightness - minBrightness) ) );
const int g = static_cast<int>(
minBrightness + (fG * intensity * (maxBrightness - minBrightness) ) );
const int b = static_cast<int>(
minBrightness + (fB * intensity * (maxBrightness - minBrightness) ) );
assert( r >= 0 ); assert( r < 256);
assert( g >= 0 ); assert( g < 256);
assert( b >= 0 ); assert( b < 256);
const int x = left + (width / 2) - 1;
const int y = top + (height / 2) - 1;
const int w = (0.707 * static_cast<double>(width ) * 0.5);
const int h = (0.707 * static_cast<double>(height) * 0.5);
{
QPen pen = painter.pen();
pen.setWidth(1);
pen.setColor(QColor(r,g,b));
painter.setPen(pen);
}
painter.setBrush(QBrush(QColor(r,g,b)));
painter.drawEllipse(x,y,w,h);
}
}
//---------------------------------------------------------------------------
///Draw a Led from a LedWidget
void QtLedWidget::DrawLed(
QPainter& painter,
const LedWidget * const widget)
{
DrawLed(
painter,
widget->GetGeometry().GetX(),
widget->GetGeometry().GetY(),
widget->GetGeometry().GetWidth(),
widget->GetGeometry().GetHeight(),
widget->GetLed());
}
//---------------------------------------------------------------------------
const std::string QtLedWidget::GetVersion()
{
return "1.2";
}
//---------------------------------------------------------------------------
const std::vector<std::string> QtLedWidget::GetVersionHistory()
{
std::vector<std::string> v;
v.push_back("2011-04-10: Version 1.0: initial version");
v.push_back("2011-04-11: Version 1.1: added About information");
v.push_back("2011-09-08: Version 1.2: removed redundant signals");
return v;
}
//---------------------------------------------------------------------------
///OnResize is called when the geometry of the LedWidget is changed
void QtLedWidget::OnResize()
{
this->setGeometry(
this->GetWidget()->GetGeometry().GetX(),
this->GetWidget()->GetGeometry().GetY(),
this->GetWidget()->GetGeometry().GetWidth(),
this->GetWidget()->GetGeometry().GetHeight());
this->repaint();
}
//---------------------------------------------------------------------------
void QtLedWidget::paintEvent(QPaintEvent *)
{
QPainter p(this);
DrawLed(p,m_widget.get());
}
//---------------------------------------------------------------------------
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