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retroshare-gui/src/gui/common/RSGraphWidget.cpp
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369
retroshare-gui/src/gui/common/RSGraphWidget.cpp
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/****************************************************************
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* This file is distributed under the following license:
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*
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* Copyright (C) 2014 RetroShare Team
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* Copyright (c) 2006-2007, crypton
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* Copyright (c) 2006, Matt Edman, Justin Hipple
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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****************************************************************/
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#include <sys/times.h>
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#include <iostream>
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#include <QtGlobal>
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#include <QPainter>
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#include <QDateTime>
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#include <QTimer>
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#include "RSGraphWidget.h"
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RSGraphSource::RSGraphSource()
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{
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_time_limit_msecs = 10*1000 ;
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_update_period_msecs = 1*1000 ;
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_time_orig_msecs = QDateTime::currentMSecsSinceEpoch() ;
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_timer = new QTimer ;
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QObject::connect(_timer,SIGNAL(timeout()),this,SLOT(update())) ;
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}
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RSGraphSource::~RSGraphSource()
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{
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stop() ;
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delete _timer ;
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}
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void RSGraphSource::clear()
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{
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_points.clear() ;
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}
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void RSGraphSource::stop()
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{
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_timer->stop() ;
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}
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void RSGraphSource::start()
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{
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_timer->stop();
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_timer->start((int)(_update_period_msecs)) ;
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}
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void RSGraphSource::getDataPoints(int index,std::vector<QPointF>& pts) const
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{
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pts.clear() ;
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qint64 now = getTime() ;
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for(std::list<std::pair<qint64,std::vector<float> > >::const_iterator it = _points.begin();it!=_points.end();++it)
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pts.push_back(QPointF( (now - (*it).first)/1000.0f,(*it).second[index])) ;
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}
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void RSGraphWidget::addSource(RSGraphSource *gs)
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{
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_sources.push_back(gs) ;
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}
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qint64 RSGraphSource::getTime() const
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{
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return QDateTime::currentMSecsSinceEpoch() - _time_orig_msecs ;
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}
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void RSGraphSource::update()
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{
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std::vector<float> vals ;
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getValues(vals) ;
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qint64 ms = getTime() ;
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_points.push_back(std::make_pair(ms,vals)) ;
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//std::cerr << "RSGraphSource::update() Got new data for time " << ms/1000.0 << ", now=" << ms << std::endl;
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// eliminate measurements that stand beyond the time limit
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for(std::list<std::pair<qint64,std::vector<float> > >::iterator it=_points.begin();it!=_points.end();)
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if( ms - (*it).first > _time_limit_msecs)
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{
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//std::cerr << " removing old value with time " << (*it).first/1000.0f << std::endl;
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it = _points.erase(it) ;
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}
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else
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break ;
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}
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void RSGraphSource::setCollectionTimeLimit(qint64 s) { _time_limit_msecs = s ; }
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void RSGraphSource::setCollectionTimePeriod(qint64 s) { _update_period_msecs = s ; }
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void RSGraphWidget::setTimeScale(float pixels_per_second)
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{
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_time_scale =pixels_per_second ;
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}
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/** Default contructor */
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RSGraphWidget::RSGraphWidget(QWidget *parent)
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: QFrame(parent)
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{
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_painter = new QPainter();
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_graphStyle = AreaGraph;
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/* Initialize graph values */
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_maxPoints = getNumPoints();
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_maxValue = MINUSER_SCALE;
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_time_scale = 5.0f ; // in pixels per second.
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_timer = new QTimer ;
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QObject::connect(_timer,SIGNAL(timeout()),this,SLOT(update())) ;
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_timer->start(1000);
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}
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/** Default destructor */
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RSGraphWidget::~RSGraphWidget()
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{
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delete _painter;
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for(uint32_t i=0;i<_sources.size();++i)
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delete _sources[i] ;
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}
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/** Gets the width of the desktop, which is the maximum number of points
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* we can plot in the graph. */
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int
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RSGraphWidget::getNumPoints()
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{
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QDesktopWidget *desktop = QApplication::desktop();
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int width = desktop->width();
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return width;
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}
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/** Clears the graph. */
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void
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RSGraphWidget::resetGraph()
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{
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_maxValue = MINUSER_SCALE;
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update();
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}
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/** Toggles display of respective graph lines and counters. */
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//void
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//DhtGraph::setShowCounters(bool showRSDHT, bool showALLDHT)
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//{
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// _showRSDHT = showRSDHT;
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// _showALLDHT = showALLDHT;
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// this->update();
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//}
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/** Overloads default QWidget::paintEvent. Draws the actual
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* bandwidth graph. */
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void RSGraphWidget::paintEvent(QPaintEvent *)
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{
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//std::cerr << "In paint event!" << std::endl;
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/* Set current graph dimensions */
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_rec = this->frameRect();
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/* Start the painter */
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_painter->begin(this);
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/* We want antialiased lines and text */
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_painter->setRenderHint(QPainter::Antialiasing);
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_painter->setRenderHint(QPainter::TextAntialiasing);
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/* Fill in the background */
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_painter->fillRect(_rec, QBrush(BACK_COLOR));
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_painter->drawRect(_rec);
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/* Paint the scale */
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paintScale();
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/* Plot the rsDHT/allDHT data */
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paintData();
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/* Paint the rsDHT/allDHT totals */
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paintTotals();
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/* Stop the painter */
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_painter->end();
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}
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/** Paints an integral and an outline of that integral for each data set (rsdht
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* and/or alldht) that is to be displayed. The integrals will be drawn first,
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* followed by the outlines, since we want the area of overlapping integrals
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* to blend, but not the outlines of those integrals. */
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void RSGraphWidget::paintData()
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{
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/* Convert the bandwidth data points to graph points */
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QVector<QPointF> points ;
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pointsFromData(points) ;
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/* Plot the bandwidth data as area graphs */
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if (_graphStyle == AreaGraph)
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paintIntegral(points, RSDHT_COLOR, 0.6);
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/* Plot the bandwidth as solid lines. If the graph style is currently an
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* area graph, we end up outlining the integrals. */
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paintLine(points, RSDHT_COLOR);
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}
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/** Returns a list of points on the bandwidth graph based on the supplied set
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* of rsdht or alldht values. */
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void RSGraphWidget::pointsFromData(QVector<QPointF>& points)
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{
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points.clear();
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int x = _rec.width();
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int y = _rec.height();
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qreal scale = (y - (y/10)) / _maxValue;
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qreal currValue;
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if(_sources.empty())
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return ;
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const RSGraphSource& source(*_sources.front()) ;
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float time_step = 1.0f ; // number of seconds per pixel
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/* Translate all data points to points on the graph frame */
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std::vector<QPointF> values ;
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source.getDataPoints(0,values) ;
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float last = values.back().x() ;
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//std::cerr << "Got " << values.size() << " values for index 0" << std::endl;
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float last_px = SCALE_WIDTH ;
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float last_py = 0.0f ;
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for (int i = 0; i < values.size(); ++i)
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{
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//std::cerr << "Value: (" << values[i].x() << " , " << values[i].y() << ")" << std::endl;
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// compute point in pixels
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float px = x - (values[i].x()-last)*_time_scale ;
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float py = y - values[i].y()*scale ;
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if(px >= SCALE_WIDTH && last_px < SCALE_WIDTH)
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{
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float alpha = (SCALE_WIDTH - last_px)/(px - last_px) ;
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float ipx = SCALE_WIDTH ;
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float ipy = (1-alpha)*last_py + alpha*py ;
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points << QPointF(ipx,y) ;
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points << QPointF(ipx,ipy) ;
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}
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else if(i==0)
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points << QPointF(px,y) ;
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last_px = px ;
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last_py = py ;
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if(px < SCALE_WIDTH)
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continue ;
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// remove midle point when 3 consecutive points have the same value.
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if(points.size() > 1 && points[points.size()-2].y() == points.back().y() && points.back().y() == py)
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points.pop_back() ;
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points << QPointF(px,py) ;
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if(i==values.size()-1)
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points << QPointF(px,y) ;
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}
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}
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/** Plots an integral using the data points in <b>points</b>. The area will be
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* filled in using <b>color</b> and an alpha-blending level of <b>alpha</b>
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* (default is opaque). */
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void RSGraphWidget::paintIntegral(const QVector<QPointF>& points, QColor color, qreal alpha)
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{
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/* Save the current brush, plot the integral, and restore the old brush */
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QBrush oldBrush = _painter->brush();
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color.setAlphaF(alpha);
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_painter->setBrush(QBrush(color));
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_painter->drawPolygon(points.data(), points.size());
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_painter->setBrush(oldBrush);
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}
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/** Iterates the input list and draws a line on the graph in the appropriate
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* color. */
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void RSGraphWidget::paintLine(const QVector<QPointF>& points, QColor color, Qt::PenStyle lineStyle)
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{
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/* Save the current brush, plot the line, and restore the old brush */
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QPen oldPen = _painter->pen();
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_painter->setPen(QPen(color, lineStyle));
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_painter->drawPolyline(points.data(), points.size());
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_painter->setPen(oldPen);
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}
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/** Paints selected total indicators on the graph. */
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void RSGraphWidget::paintTotals()
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{
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int x = SCALE_WIDTH + FONT_SIZE, y = 0;
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int rowHeight = FONT_SIZE;
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#if !defined(Q_WS_MAC)
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/* On Mac, we don't need vertical spacing between the text rows. */
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rowHeight += 5;
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#endif
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// /* If total received is selected */
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// y = rowHeight;
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// _painter->setPen(RSDHT_COLOR);
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// _painter->drawText(x, y,
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// tr("RetroShare users in DHT: ")+
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// " ("+tr("%1").arg(_rsDHT->first(), 0, 'f', 0)+")");
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}
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/** Returns a formatted string with the correct size suffix. */
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QString RSGraphWidget::totalToStr(qreal total)
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{
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/* Determine the correct size suffix */
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if (total < 1024) {
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/* Use KB suffix */
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return tr("%1 KB").arg(total, 0, 'f', 2);
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} else if (total < 1048576) {
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/* Use MB suffix */
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return tr("%1 MB").arg(total/1024.0, 0, 'f', 2);
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} else {
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/* Use GB suffix */
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return tr("%1 GB").arg(total/1048576.0, 0, 'f', 2);
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}
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}
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/** Paints the scale on the graph. */
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void RSGraphWidget::paintScale()
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{
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qreal markStep = _maxValue * .25;
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int top = _rec.y();
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int bottom = _rec.height();
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qreal paintStep = (bottom - (bottom/10)) / 4;
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/* Draw the other marks in their correctly scaled locations */
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qreal scale;
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qreal pos;
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for (int i = 1; i < 5; i++) {
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pos = bottom - (i * paintStep);
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scale = i * markStep;
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_painter->setPen(SCALE_COLOR);
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_painter->drawText(QPointF(5, pos+FONT_SIZE),
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tr("%1 Users").arg(scale, 0, 'f', 0));
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_painter->setPen(GRID_COLOR);
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_painter->drawLine(QPointF(SCALE_WIDTH, pos),
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QPointF(_rec.width(), pos));
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}
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/* Draw vertical separator */
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_painter->drawLine(SCALE_WIDTH, top, SCALE_WIDTH, bottom);
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}
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177
retroshare-gui/src/gui/common/RSGraphWidget.h
Normal file
177
retroshare-gui/src/gui/common/RSGraphWidget.h
Normal file
@ -0,0 +1,177 @@
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/****************************************************************
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* This file is distributed under the following license:
|
||||
*
|
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* Copyright (C) 2014 RetroShare Team
|
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* Copyright (c) 2006-2007, crypton
|
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* Copyright (c) 2006, Matt Edman, Justin Hipple
|
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*
|
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* 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., 51 Franklin Street, Fifth Floor,
|
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* Boston, MA 02110-1301, USA.
|
||||
****************************************************************/
|
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#pragma once
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#include <QApplication>
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#include <QDesktopWidget>
|
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#include <QFrame>
|
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#include <stdint.h>
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#define HOR_SPC 2 /** Space between data points */
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#define SCALE_WIDTH 75 /** Width of the scale */
|
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#define MINUSER_SCALE 2000 /** 2000 users is the minimum scale */
|
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#define SCROLL_STEP 4 /** Horizontal change on graph update */
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#define BACK_COLOR Qt::white
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#define SCALE_COLOR Qt::black
|
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#define GRID_COLOR Qt::black
|
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#define RSDHT_COLOR Qt::magenta
|
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#define ALLDHT_COLOR Qt::yellow
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#define FONT_SIZE 11
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// This class provides a source value that the graph can retrieve on demand.
|
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// In order to use your own source, derive from RSGraphSource and overload the value() method.
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//
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class RSGraphSource: public QObject
|
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{
|
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Q_OBJECT
|
||||
|
||||
public:
|
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RSGraphSource();
|
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virtual ~RSGraphSource() ;
|
||||
|
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void start() ;
|
||||
void stop() ;
|
||||
void clear() ;
|
||||
|
||||
virtual int n_values() const =0; // Method to overload in your own class
|
||||
|
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// Returns the n^th interpolated value at the given time in floating point seconds backward.
|
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virtual void getDataPoints(int index, std::vector<QPointF>& pts) const ;
|
||||
|
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// Sets the maximum time for keeping values. Units=seconds.
|
||||
void setCollectionTimeLimit(qint64 msecs) ;
|
||||
|
||||
// Sets the time period for collecting new values. Units=milliseconds.
|
||||
void setCollectionTimePeriod(qint64 msecs) ;
|
||||
|
||||
protected slots:
|
||||
// Calls the internal source for a new data points; called by the timer.
|
||||
void update() ;
|
||||
|
||||
protected:
|
||||
virtual void getValues(std::vector<float>& values) const = 0 ; // overload this in your own class to fill in the values you want to display.
|
||||
|
||||
qint64 getTime() const ; // returns time in ms since RS has started
|
||||
|
||||
std::list<std::pair<qint64,std::vector<float> > > _points ;
|
||||
|
||||
QTimer *_timer ;
|
||||
|
||||
qint64 _time_limit_msecs ;
|
||||
qint64 _update_period_msecs ;
|
||||
qint64 _time_orig_msecs ;
|
||||
};
|
||||
|
||||
class RSGraphWidget: public QFrame
|
||||
{
|
||||
Q_OBJECT
|
||||
|
||||
public:
|
||||
static const uint32_t RSGRAPH_FLAGS_AUTO_SCALE_Y = 0x0001 ; // automatically adjust Y scale
|
||||
static const uint32_t RSGRAPH_FLAGS_LOG_SCALE_Y = 0x0002 ; // log scale in Y
|
||||
static const uint32_t RSGRAPH_FLAGS_ALWAYS_COLLECT = 0x0004 ; // keep collecting while not displayed
|
||||
|
||||
/** Bandwidth graph style. */
|
||||
enum GraphStyle
|
||||
{
|
||||
SolidLine = 0, /**< Plot bandwidth as solid lines. */
|
||||
AreaGraph = 1 /**< Plot bandwidth as alpha blended area graphs. */
|
||||
};
|
||||
|
||||
/** Default Constructor */
|
||||
RSGraphWidget(QWidget *parent = 0);
|
||||
/** Default Destructor */
|
||||
~RSGraphWidget();
|
||||
|
||||
// sets the update interval period.
|
||||
//
|
||||
void setTimerPeriod(int miliseconds) ;
|
||||
void addSource(RSGraphSource *gs) ;
|
||||
void setTimeScale(float pixels_per_second) ;
|
||||
|
||||
/** Add data points. */
|
||||
//void addPoints(qreal rsDHT, qreal allDHT);
|
||||
/** Clears the graph. */
|
||||
void resetGraph();
|
||||
/** Toggles display of data counters. */
|
||||
//void setShowCounters(bool showRSDHT, bool showALLDHT);
|
||||
/** Sets the graph style used to display bandwidth data. */
|
||||
void setGraphStyle(GraphStyle style) { _graphStyle = style; }
|
||||
|
||||
protected:
|
||||
/** Overloaded QWidget::paintEvent() */
|
||||
void paintEvent(QPaintEvent *event);
|
||||
|
||||
protected slots:
|
||||
void updateDisplay() {}
|
||||
|
||||
private:
|
||||
/** Gets the width of the desktop, the max # of points. */
|
||||
int getNumPoints();
|
||||
|
||||
/** Paints an integral and an outline of that integral for each data set
|
||||
* (rsdht and/or alldht) that is to be displayed. */
|
||||
void paintData();
|
||||
/** Paints the rsdht/alldht totals. */
|
||||
void paintTotals();
|
||||
/** Paints the scale in the graph. */
|
||||
void paintScale();
|
||||
/** Returns a formatted string representation of total. */
|
||||
QString totalToStr(qreal total);
|
||||
/** Returns a list of points on the bandwidth graph based on the supplied set
|
||||
* of rsdht or alldht values. */
|
||||
void pointsFromData(QVector<QPointF> & ) ;
|
||||
|
||||
/** Paints a line with the data in <b>points</b>. */
|
||||
void paintLine(const QVector<QPointF>& points, QColor color,
|
||||
Qt::PenStyle lineStyle = Qt::SolidLine);
|
||||
/** Paints an integral using the supplied data. */
|
||||
void paintIntegral(const QVector<QPointF>& points, QColor color, qreal alpha = 1.0);
|
||||
|
||||
/** Style with which the bandwidth data will be graphed. */
|
||||
GraphStyle _graphStyle;
|
||||
/** A QPainter object that handles drawing the various graph elements. */
|
||||
QPainter* _painter;
|
||||
/** The current dimensions of the graph. */
|
||||
QRect _rec;
|
||||
/** The maximum data value plotted. */
|
||||
qreal _maxValue;
|
||||
/** The maximum number of points to store. */
|
||||
int _maxPoints;
|
||||
|
||||
qreal _time_scale ; // horizontal scale in pixels per sec.
|
||||
|
||||
/** Show the respective lines and counters. */
|
||||
//bool _showRSDHT;
|
||||
//bool _showALLDHT;
|
||||
|
||||
uint32_t _flags ;
|
||||
QTimer *_timer ;
|
||||
|
||||
std::vector<RSGraphSource *> _sources ;
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user