1 files changed, 134 insertions, 0 deletions
diff --git a/test/chartarea/widget.cpp b/test/chartarea/widget.cpp
new file mode 100644
index 0000000..0da898d
--- /dev/null
+++ b/test/chartarea/widget.cpp
@@ -0,0 +1,134 @@
+/***********************************************************************
+* Copyright 2003-2004  Max Howell <max.howell@methylblue.com>
+* Copyright 2008-2009  Martin Sandsmark <martin.sandsmark@kde.org>
+*
+* 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) version 3 or any later version
+* accepted by the membership of KDE e.V. (or its successor approved
+* by the membership of KDE e.V.), which shall act as a proxy
+* defined in Section 14 of version 3 of the license.
+*
+* 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/>.
+***********************************************************************/
+
+#include "widget.h"
+
+#include <QWidget>
+#include <QPainter>
+#include <QVector>
+#include <QPointF>
+#include <iostream>
+
+ChartArea::Widget::Widget(QWidget *parent)
+        : QWidget(parent)
+{
+    setSizePolicy(QSizePolicy::Preferred,QSizePolicy::MinimumExpanding);
+    setMinimumHeight(20);
+    setMinimumWidth(100);
+}
+
+ChartArea::Widget::~Widget()
+{
+}
+
+void ChartArea::Widget::invalidate()
+{
+}
+
+void ChartArea::Widget::resizeEvent(QResizeEvent*)
+{
+    /*std::cerr << "width(): " << width() << std::endl;
+    std::cerr << "height(): " << height() << std::endl;*/
+}
+
+void ChartArea::Widget::addValue(uint64_t value)
+{
+    //m_values.push_back(value);
+    while(m_values.size()>64)
+        m_values.erase(m_values.begin());
+    update();
+}
+
+void ChartArea::Widget::paintEvent(QPaintEvent*)
+{
+    //std::cerr << "paintEvent(): " << width() << std::endl;
+
+    QPainter painter;
+    painter.begin(this);
+    painter.drawRect(0,0,width()-1,height()-1);
+    painter.setRenderHint(QPainter::Antialiasing,true);
+    painter.setRenderHint(QPainter::SmoothPixmapTransform,true);
+    painter.setRenderHint(QPainter::HighQualityAntialiasing,true);
+
+    while(m_values.size()<64)
+        m_values.insert(m_values.begin(),0);
+    std::vector<uint64_t> values=m_values;
+    QVector<QPointF> points;
+    {
+        uint64_t max=0;
+        unsigned int index=0;
+        while(index<values.size())
+        {
+            if(max<values.at(index))
+                max=values.at(index);
+            index++;
+        }
+        if(max<=0)
+        {
+            points << QPointF(0, height()-1);
+            points << QPointF(width()/2, height()-1);
+            points << QPointF(width()-1, height()-1);
+        }
+        else
+        {
+            index=0;
+            while(index<values.size())
+            {
+                int w=width()-1;
+                int nw=w*index/(m_values.size()-1);
+                points << QPointF(nw, height()-values.at(index)*height()/max);
+                index++;
+            }
+        }
+    }
+
+    painter.setPen(Qt::NoPen);
+    QLinearGradient gradient(0,height()*0.5,0,height());
+    gradient.setColorAt(0, QColor(160,240,160,150));
+    //gradient.setColorAt(0.2, QColor(100,220,100,200));
+    gradient.setColorAt(1, QColor(160,240,160,0));
+    painter.setBrush(gradient);
+    points.push_front(QPointF(0, height()-1));
+    points.push_back(QPointF(width()-1, height()-1));
+    painter.drawPolygon(QPolygonF(points));
+
+    if(width()*height()>250000)
+        painter.setPen(QPen(QColor(160,240,160), 3));
+    else
+        painter.setPen(QPen(QColor(160,240,160), 2));
+    painter.drawPolyline(QPolygonF(points));
+
+
+    // todo: bounding rect + center flag
+    if(height()>30)
+    {
+        QFont font = painter.font();
+        int heightTemp=height()/5;
+        if(heightTemp<14)
+            heightTemp=14;
+        font.setPixelSize(heightTemp);
+        painter.setFont(font);
+
+        painter.setPen(QPen(QColor(140,140,140), 3));
+        painter.drawText(0,0,width(),height(),Qt::AlignHCenter | Qt::AlignBottom,tr("%1B/s").arg(m_values.back()));
+    }
+    painter.end();
+}