1 files changed, 110 insertions, 0 deletions
diff --git a/src/graph.cpp b/src/graph.cpp
new file mode 100644
index 0000000..f0b4e8b
--- /dev/null
+++ b/src/graph.cpp
@@ -0,0 +1,110 @@
+/***************************************************************************
+                                 graph.cpp
+                             -------------------
+    begin                : Sat Sep 29 2001
+    copyright            : (C) 2001 - 2012 by Roland Riegel
+    email                : feedback@roland-riegel.de
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   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.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include "graph.h"
+#include "setting.h"
+#include "settingstore.h"
+#include "window.h"
+
+using namespace std;
+
+Graph::Graph()
+    : m_heightOfBars(5), m_maxDeflection(10 * 1024 * 1024 / 8)
+{
+}
+
+Graph::~Graph()
+{
+}
+
+// sets the number of the graph's vertical #-bars
+void Graph::setNumOfBars(unsigned int numOfBars)
+{
+    // vertically resize the graph's value list
+    m_values.resize(numOfBars);
+}
+
+// sets the height of the graph's vertical #-bars
+void Graph::setHeightOfBars(unsigned int heightOfBars)
+{
+    m_heightOfBars = heightOfBars;
+}
+
+void Graph::setMaxDeflection(unsigned long long maxDeflection)
+{
+    m_maxDeflection = maxDeflection;
+}
+
+// new traffic measurement has been made => update the graph's value list
+void Graph::update(unsigned long long value)
+{
+    // [new_value] = Bytes/s
+    
+    // put new value to the beginning of the list, it becomes the first #-bar
+    m_values.push_front(value);
+
+    // delete the last #-bar of the list, but keep at least one
+    if(m_values.size() > 1)
+        m_values.pop_back();
+}
+
+// print the graph with the upper left corner at the coordinates (x, y)
+void Graph::print(Window& window, int x, int y)
+{
+    window.setXY(x, y);
+    
+    // cycle through through the lines
+    for(unsigned int l = 0; l < m_heightOfBars; l++)
+    {
+        // for each line cycle through the rows
+        for(list<unsigned long long>::reverse_iterator r = m_values.rbegin(); r != m_values.rend() ; r++)
+        {
+            unsigned long long trafficPerLine = m_maxDeflection / m_heightOfBars;
+            unsigned long long lowerLimit = m_maxDeflection * (m_heightOfBars - l - 1) / m_heightOfBars;
+
+            if(*r < lowerLimit)
+            {
+                window.print(' ');
+            }
+            else 
+            {
+                unsigned long long restOfTraffic = *r - lowerLimit;
+
+                if(restOfTraffic >= trafficPerLine)
+                    window.print('#');
+                else if(restOfTraffic >= trafficPerLine * 7 / 10)
+                    window.print('|');
+                else if(restOfTraffic >= trafficPerLine * 3 / 10)
+                    window.print('.');
+                else
+                    window.print(' ');
+            }
+        }
+        window.print('\n');
+        window.setX(x);
+    }
+    
+}
+
+// reset all traffic values in the graph to zero
+void Graph::resetTrafficData()
+{
+    int size = m_values.size();
+    m_values.clear();
+    m_values.resize(size);
+}
+