From e6d55cba85fc49b3dfac8150c397540bda369847 Mon Sep 17 00:00:00 2001
From: Marian Gasparovic <marian.gasparovic@canonical.com>
Date: Sun, 4 Feb 2018 18:36:36 +0100
Subject: Scaling network graph using thresholds defined by user

---
 multiload/load-graph.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 86 insertions(+), 2 deletions(-)

(limited to 'multiload/load-graph.c')

diff --git a/multiload/load-graph.c b/multiload/load-graph.c
index e3d0c12c..5eb90e8f 100644
--- a/multiload/load-graph.c
+++ b/multiload/load-graph.c
@@ -66,8 +66,8 @@ load_graph_draw (LoadGraph *g)
   cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
   cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
 
-  /* all graphs except Load go this path */
-  if (g->id != 4)
+  /* all graphs except Load and Net go this path */
+  if (g->id != 4 && g->id != 2)
   {
     for (i = 0; i < g->draw_width; i++)
       g->pos [i] = g->draw_height - 1;
@@ -87,7 +87,91 @@ load_graph_draw (LoadGraph *g)
       }
       cairo_stroke (cr);
     }
+  }
+  /* This is for network graph */
+  else if (g->id == 2)
+  {
+    guint maxnet = 1;
+    gint segments = 1;
+    gint combined = 0;
+    for (i = 0; i < g->draw_width; i++)
+    {
+      g->pos [i] = g->draw_height - 1;
+      combined = 0;
+      combined += g->data[i][0];
+      combined += g->data[i][1];
+      combined += g->data[i][2];
+      if (combined > maxnet)
+        maxnet = combined;
+    }
+    //printf("max = %d ", maxnet);
+    guint level = 0;
+    GdkRGBA grid_color;
+    if (maxnet > g->net_threshold3) {
+      g->net_threshold = g->net_threshold3;
+      level = 3;
+    }
+    else
+      if (maxnet > g->net_threshold2) {
+        g->net_threshold = g->net_threshold2;
+        level = 2;
+      }
+      else {
+        g->net_threshold = g->net_threshold1;
+        level = 1;
+        if (maxnet < g->net_threshold1)
+          level = 0;
+      }
+
+    //printf("level %d maxnet = %d ", level, maxnet);
+    maxnet = maxnet/g->net_threshold;
+    segments = MAX (maxnet+1,1);
+    float ratio = (float)g->draw_height/g->net_threshold/segments;
+    //printf("segments %d ratio = %f t1=%ld t2=%ld t3=%ld t=%ld\n", segments, ratio, g->net_threshold1, g->net_threshold2, g->net_threshold3, g->net_threshold);
+
+    for (j = 0; j < g->n-1; j++)
+    {
+      gdk_cairo_set_source_rgba (cr, &(g->colors [j]));
+
+      for (i = 0; i < g->draw_width; i++)
+      {
+        cairo_move_to (cr, g->draw_width - i - 0.5, g->pos[i] + 0.5);
+        cairo_line_to (cr, g->draw_width - i - 0.5, g->pos[i] - 0.5 - ((g->data [i][j] * ratio)));
+        g->pos [i] -= ((g->data [i][j] * ratio));
+      }
+      cairo_stroke (cr);
+    }
+
+    for (j = g->n-1; j < g->n; j++)
+    {
+      gdk_cairo_set_source_rgba (cr, &(g->colors [j]));
+      for (i = 0; i < g->draw_width; i++)
+      {
+          cairo_move_to (cr, g->draw_width - i - 0.5, g->pos[i] + 0.5);
+          cairo_line_to (cr, g->draw_width - i - 0.5, 0.5);
+      }
+      cairo_stroke (cr);
+    }
 
+    /* draw grid lines if needed */
+    gdk_cairo_set_source_rgba (cr, &(g->colors [4]));
+    double spacing = 0;
+    for (k = 0; k < segments -1; k++)
+    {
+      spacing = ((double) g->draw_height/segments) * (k+1);
+      cairo_move_to (cr, 0.5, spacing);
+      cairo_line_to (cr, g->draw_width-0.5, spacing);
+    }
+    cairo_stroke (cr);
+    /* draw indicator if needed */
+    if (level > 0)
+    {
+      gdk_cairo_set_source_rgba (cr, &(g->colors [5]));
+      for (k = 0; k< level; k++ )
+        cairo_rectangle(cr, 0.5, (k*2) * g->draw_height/5, 5, g->draw_height/5);
+      cairo_fill(cr);
+    }
+    cairo_stroke (cr);
   }
   /* this is Load graph */
   else
-- 
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