MatrixDisplayWidget.cpp

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/*
 * This file is part of ArmarX.
 *
 * Copyright (C) 2011-2016, High Performance Humanoid Technologies (H2T), Karlsruhe Institute of Technology (KIT), all rights reserved.
 *
 * ArmarX is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * ArmarX 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/>.
 *
 * @package
 * @author
 * @date
 * @copyright  http://www.gnu.org/licenses/gpl-2.0.txt
 *             GNU General Public License
 */
#include "MatrixDisplayWidget.h"
 
#include <iostream>
 
#include <pthread.h>
 
#include <QPainter>
 
#include <RobotAPI/gui-plugins/HapticUnitPlugin/ui_MatrixDisplayWidget.h>
 
namespace armarx
{
    MatrixDisplayWidget::MatrixDisplayWidget(QWidget* parent) :
        QWidget(parent), ui(new Ui::MatrixDisplayWidget)
    {
        ui->setupUi(this);
        this->min = 0;
        this->max = 1;
        this->data = MatrixXf(1, 1);
        this->data(0, 0) = 0;
        QColor c[] = {QColor::fromHsv(0, 0, 0),
                      QColor::fromHsv(240, 255, 255),
                      QColor::fromHsv(270, 255, 255),
                      QColor::fromHsv(300, 255, 255),
                      QColor::fromHsv(0, 255, 255),
                      QColor::fromHsv(30, 255, 255),
                      QColor::fromHsv(60, 255, 255)};
        this->colors = std::valarray<QColor>(c, sizeof c / sizeof c[0]);
 
        //connect(this, SIGNAL(updateData(MatrixXf)), SLOT(setData(MatrixXf)), Qt::QueuedConnection);
        connect(this, SIGNAL(doUpdate()), SLOT(update()), Qt::QueuedConnection);
    }
 
    MatrixDisplayWidget::~MatrixDisplayWidget()
    {
        delete ui;
    }
 
    void
    MatrixDisplayWidget::paintEvent(QPaintEvent*)
    {
        mtx.lock();
        MatrixXf data = this->data;
 
        //cout << "[" << pthread_self() << "] MatrixDisplayWidget::paintEvent" << endl;
 
        int pixelSize = std::min(width() / data.cols(), height() / data.rows());
        int dx = (width() - pixelSize * data.cols()) / 2;
        int dy = (height() - pixelSize * data.rows()) / 2;
        QPainter painter(this);
        painter.fillRect(rect(), QColor::fromRgb(0, 0, 0));
        painter.setFont(QFont("Arial", 8));
 
        for (int x = 0; x < data.cols(); x++)
        {
            for (int y = 0; y < data.rows(); y++)
            {
                QRect target = QRect(dx + x * pixelSize, dy + y * pixelSize, pixelSize, pixelSize);
                painter.fillRect(target, getColor(data(y, x), min, max));
                painter.drawText(target, Qt::AlignCenter, QString::number(data(y, x)));
            }
        }
 
        painter.setFont(QFont("Arial", 12));
        painter.drawText(rect(), Qt::AlignBottom | Qt::AlignRight, infoOverlay);
 
        mtx.unlock();
    }
 
    QColor
    MatrixDisplayWidget::getColor(float value, float min, float max)
    {
        value = (value - min) / (max - min) * (colors.size() - 1);
 
        if (value < 0)
        {
            return colors[0];
        }
 
        if (value >= colors.size() - 1)
        {
            return colors[colors.size() - 1];
        }
 
        int i = (int)value;
        float f2 = value - i;
        float f1 = 1 - f2;
        QColor c1 = colors[i];
        QColor c2 = colors[i + 1];
        return QColor((int)(c1.red() * f1 + c2.red() * f2),
                      (int)(c1.green() * f1 + c2.green() * f2),
                      (int)(c1.blue() * f1 + c2.blue() * f2));
    }
} // namespace armarx