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path: root/src/plugins/stats/statistics.c
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/*
     This file is part of GNUnet
     (C) 2004, 2005, 2006 Christian Grothoff (and other contributing authors)

     GNUnet 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, or (at your
     option) any later version.

     GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.

     Portions of this code were adopted from the
     gnome-system-monitor v2.0.5, (C) 2001 Kevin Vandersloot
*/

#include "platform.h"
#include "gnunetgtk_common.h"
#include <GNUnet/gnunet_stats_lib.h>
#include <GNUnet/gnunet_getoption_lib.h>
#include "functions.h"

#define MAX_COLOR 6
#define GNOME_PAD_SMALL 2
#define FRAME_WIDTH 0


typedef struct
{
  gint type;
  guint count;
  guint speed;
  guint draw_width, draw_height;
  guint num_points;
  guint allocated;
  GdkColor *colors;
  gfloat **data;
  gfloat **odata;
  guint data_size;
  gint colors_allocated;
  GtkWidget *main_widget;
  GtkWidget *disp;
  GtkWidget *label;
  GdkPixmap *pixmap;
  GdkGC *gc;
  int timer_index;
  gboolean draw;
  int statIdx;
} LoadGraph;

typedef struct
{
  GdkColor bg_color;
  GdkColor frame_color;
  GdkColor mem_color[MAX_COLOR];
} ProcConfig;

static unsigned long long UPDATE_INTERVAL;

/**
 * Redraws the backing pixmap for the load graph and updates the window
 */
static void
load_graph_draw (LoadGraph * g)
{
  guint i;
  guint j;
  gint dely;
  float delx;
  float max;
  GdkFont *font;

  if (!g->disp->window)
    return;

  g->draw_width = g->disp->allocation.width;
  g->draw_height = g->disp->allocation.height;

  if (!g->pixmap)
    g->pixmap = gdk_pixmap_new (g->disp->window,
                                g->draw_width, g->draw_height,
                                gtk_widget_get_visual (g->disp)->depth);

  /* Create GC if necessary. */
  if (!g->gc)
    {
      g->gc = gdk_gc_new (g->disp->window);
      gdk_gc_copy (g->gc, g->disp->style->white_gc);
    }

  /* Allocate colors. */
  if (!g->colors_allocated)
    {
      GdkColormap *colormap;

      colormap = gdk_window_get_colormap (g->disp->window);
      for (i = 0; i < 2 + g->count; i++)
        gdk_color_alloc (colormap, &(g->colors[i]));

      g->colors_allocated = 1;
    }
  /* Erase Rectangle */
  gdk_gc_set_foreground (g->gc, &(g->colors[0]));
  gdk_draw_rectangle (g->pixmap,
                      g->gc,
                      TRUE, 0, 0,
                      g->disp->allocation.width, g->disp->allocation.height);

  /* draw frame */
  gdk_gc_set_foreground (g->gc, &(g->colors[1]));
  gdk_draw_rectangle (g->pixmap,
                      g->gc,
                      FALSE, 0, 0, g->draw_width, g->disp->allocation.height);

  max = 0.26;                   /* force showing at least the 25% line */
  for (i = 0; i < g->num_points - 1; i++)
    for (j = 0; j < g->count; j++)
      if (g->data[i][j] > max)
        max = g->data[i][j];
  max = max * 1.01;             /* leave top 1% free */

  font = gdk_font_load ("fixed");       /* deprecated, but pango is far more than
                                           what we need here -- fix later? */
  /* draw lines at 25%, 50%, 75% and 100% of max */
  dely = g->draw_height / max / 4;
  for (i = 1; i < 5; i++)
    {
      gint y1 = g->draw_height + 1 - i * dely;
      if ((dely < 30) && (i != 4))
        continue;               /* only print additional
                                   lines if there is enough space! */
      if (y1 > 0)
        {
          const gchar *label[] = {
            NULL,
            " 25%",
            " 50%",
            " 75%",
            "100%",
          };
          gdk_draw_string (g->pixmap, font, g->gc, 10, y1 - 8, label[i]);
          gdk_draw_line (g->pixmap, g->gc, 0, y1, g->draw_width, y1);
          if (i == 4)
            {
              /* extra-thick line at 100% */
              gdk_draw_line (g->pixmap, g->gc,
                             0, y1 - 1, g->draw_width, y1 - 1);
              gdk_draw_line (g->pixmap, g->gc,
                             0, y1 + 1, g->draw_width, y1 + 1);

            }
        }
    }
  gdk_gc_set_line_attributes (g->gc,
                              2,
                              GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_MITER);
  delx = (float) g->draw_width / (g->num_points - 1);

  for (j = 0; j < g->count; j++)
    {
      gdk_gc_set_foreground (g->gc, &(g->colors[j + 2]));
      for (i = 0; i < g->num_points - 1; i++)
        {
          gint x1 = i * delx;
          gint x2 = (i + 1) * delx;
          gint y1 = g->data[i][j] / max * g->draw_height - 1;
          gint y2 = g->data[i + 1][j] / max * g->draw_height - 1;

          if ((g->data[i][j] != -1) && (g->data[i + 1][j] != -1))
            {
              if (stats[g->statIdx].fill <= j)
                {
                  gdk_draw_line (g->pixmap, g->gc,
                                 g->draw_width - x2,
                                 g->draw_height - y2,
                                 g->draw_width - x1, g->draw_height - y1);
                }
              else
                {
                  GdkPoint points[4];

                  points[0].x = g->draw_width - x2;
                  points[0].y = g->draw_height - y2;
                  points[1].x = g->draw_width - x1;
                  points[1].y = g->draw_height - y1;
                  points[2].x = g->draw_width - x1;
                  points[3].x = g->draw_width - x2;
                  if (j == 0)
                    {
                      points[2].y = g->draw_height;
                      points[3].y = g->draw_height;
                    }
                  else
                    {
                      gint ly1 = g->data[i][j - 1] / max * g->draw_height - 1;
                      gint ly2 =
                        g->data[i + 1][j - 1] / max * g->draw_height - 1;
                      points[2].y = g->draw_height - ly1;
                      points[3].y = g->draw_height - ly2;
                    }
                  gdk_draw_polygon (g->pixmap, g->gc, 1, points, 4);
                }
            }
        }
    }

  gdk_gc_set_line_attributes (g->gc, 1,
                              GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_MITER);

  gdk_draw_pixmap (g->disp->window,
                   g->disp->style->fg_gc[GTK_WIDGET_STATE (g->disp)],
                   g->pixmap,
                   0, 0,
                   0, 0,
                   g->disp->allocation.width, g->disp->allocation.height);
}


/* Updates the load graph when the timeout expires */
static gboolean
load_graph_update (gpointer ptr)
{
  LoadGraph *g = ptr;
  guint i;
  guint j;

  for (i = 0; i < g->num_points; i++)
    memcpy (g->odata[i], g->data[i], g->data_size * g->count);
  stats[g->statIdx].getData (stats[g->statIdx].get_closure, g->data);
  for (i = 0; i < g->num_points - 1; i++)
    for (j = 0; j < g->count; j++)
      g->data[i + 1][j] = g->odata[i][j];
  if (g->draw)
    load_graph_draw (g);
  return TRUE;
}

static void
load_graph_unalloc (LoadGraph * g)
{
  int i;
  if (!g->allocated)
    return;
  for (i = 0; i < g->num_points; i++)
    {
      FREE (g->data[i]);
      FREE (g->odata[i]);
    }
  FREE (g->data);
  FREE (g->odata);
  g->data = g->odata = NULL;
  if (g->pixmap)
    {
      gdk_pixmap_unref (g->pixmap);
      g->pixmap = NULL;
    }
  g->allocated = FALSE;
}

static void
load_graph_alloc (LoadGraph * g)
{
  int i;
  int j;

  if (g->allocated)
    return;

  g->data = MALLOC (sizeof (gfloat *) * g->num_points);
  g->odata = MALLOC (sizeof (gfloat *) * g->num_points);
  g->data_size = sizeof (gfloat);
  for (i = 0; i < g->num_points; i++)
    {
      g->data[i] = MALLOC (g->data_size * g->count);
      g->odata[i] = MALLOC (g->data_size * g->count);
    }
  for (i = 0; i < g->num_points; i++)
    for (j = 0; j < g->count; j++)
      g->data[i][j] = -1;
  g->allocated = TRUE;
}

static gint
load_graph_configure (GtkWidget * widget,
                      GdkEventConfigure * event, gpointer data_ptr)
{
  LoadGraph *c = (LoadGraph *) data_ptr;

  if (c->pixmap)
    {
      gdk_pixmap_unref (c->pixmap);
      c->pixmap = NULL;
    }

  if (!c->pixmap)
    c->pixmap = gdk_pixmap_new (widget->window,
                                widget->allocation.width,
                                widget->allocation.height,
                                gtk_widget_get_visual (c->disp)->depth);
  gdk_draw_rectangle (c->pixmap,
                      widget->style->black_gc,
                      TRUE, 0, 0,
                      widget->allocation.width, widget->allocation.height);
  gdk_draw_pixmap (widget->window,
                   c->disp->style->fg_gc[GTK_WIDGET_STATE (widget)],
                   c->pixmap,
                   0, 0,
                   0, 0,
                   c->disp->allocation.width, c->disp->allocation.height);

  load_graph_draw (c);
  return TRUE;
}

static gint
load_graph_expose (GtkWidget * widget,
                   GdkEventExpose * event, gpointer data_ptr)
{
  LoadGraph *g = (LoadGraph *) data_ptr;

  gdk_draw_pixmap (widget->window,
                   widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
                   g->pixmap,
                   event->area.x, event->area.y,
                   event->area.x, event->area.y,
                   event->area.width, event->area.height);
  return FALSE;
}

static void
load_graph_stop (LoadGraph * g)
{
  if (!g)
    return;
  if (g->timer_index != -1)
    {
      gtk_timeout_remove (g->timer_index);
      g->timer_index = -1;
    }
  g->draw = FALSE;
}

static void
load_graph_destroy (GtkWidget * widget, gpointer data_ptr)
{
  LoadGraph *g = (LoadGraph *) data_ptr;
  load_graph_stop (g);
  if (g->timer_index != -1)
    gtk_timeout_remove (g->timer_index);
  load_graph_unalloc (g);
  FREE (g->colors);
  FREE (g);
}

static LoadGraph *
load_graph_new (int statIdx, const ProcConfig * config)
{
  LoadGraph *g;
  unsigned int i;

  if (stats[statIdx].count > MAX_COLOR)
    {
      GE_BREAK (NULL, 0);
      return NULL;
    }

  g = MALLOC (sizeof (LoadGraph));
  g->statIdx = statIdx;
  g->count = stats[statIdx].count;
  g->speed = UPDATE_INTERVAL / cronMILLIS;
  g->num_points = 600;
  g->colors = MALLOC (sizeof (GdkColor) * (2 + g->count));
  g->colors[0] = config->bg_color;
  g->colors[1] = config->frame_color;
  for (i = 0; i < g->count; i++)
    g->colors[2 + i] = config->mem_color[i];
  g->timer_index = -1;
  g->draw = FALSE;
  g->main_widget = gtk_vbox_new (FALSE, FALSE);
  gtk_widget_show (g->main_widget);
  g->disp = gtk_drawing_area_new ();
  gtk_widget_show (g->disp);
  gtk_signal_connect (GTK_OBJECT (g->disp),
                      "expose_event", GTK_SIGNAL_FUNC (load_graph_expose), g);
  gtk_signal_connect (GTK_OBJECT (g->disp),
                      "configure_event",
                      GTK_SIGNAL_FUNC (load_graph_configure), g);
  gtk_signal_connect (GTK_OBJECT (g->disp),
                      "destroy", GTK_SIGNAL_FUNC (load_graph_destroy), g);
  gtk_widget_add_events (g->disp, GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK);
  gtk_box_pack_start (GTK_BOX (g->main_widget), g->disp, TRUE, TRUE, 0);
  load_graph_alloc (g);
  gtk_widget_show_all (g->main_widget);
  g->timer_index = gtk_timeout_add (g->speed, &load_graph_update, g);

  return g;
}

static GtkWidget *
create_sys_view (int statIdx, const ProcConfig * config)
{
  GtkWidget *mem_frame;
  LoadGraph *mem_graph;

  mem_graph = load_graph_new (statIdx, config);
  if (mem_graph == NULL)
    return NULL;                /* oops */
  mem_frame = gtk_frame_new (_(stats[statIdx].frameName));
  gtk_container_add (GTK_CONTAINER (mem_frame), mem_graph->main_widget);
  gtk_container_set_border_width (GTK_CONTAINER (mem_graph->main_widget),
                                  GNOME_PAD_SMALL);
  gtk_container_set_border_width (GTK_CONTAINER (mem_frame), GNOME_PAD_SMALL);
  gtk_widget_show (mem_frame);
  if (mem_graph->timer_index == -1)
    mem_graph->timer_index
      = gtk_timeout_add (mem_graph->speed, &load_graph_update, mem_graph);
  mem_graph->draw = TRUE;
  return mem_frame;
}





void
init_stats (struct GE_Context *ectx, struct GC_Configuration *cfg)
{
  GtkWidget *sys_box;
  GtkWidget *label;
  GtkWidget *notebook;
  ProcConfig config;
  int i;

  GC_get_configuration_value_number (cfg,
                                     "GNUNET-GTK",
                                     "STATS-INTERVAL",
                                     1,
                                     99 * cronYEARS,
                                     30 * cronSECONDS, &UPDATE_INTERVAL);
  init_functions (ectx, cfg);
  notebook = glade_xml_get_widget (getMainXML (), "statsNotebook");
  memset (&config, 0, sizeof (ProcConfig));
  gdk_color_parse ("black", &config.bg_color);
  gdk_color_parse ("gray", &config.frame_color);
  gdk_color_parse ("red", &config.mem_color[0]);
  gdk_color_parse ("green", &config.mem_color[1]);
  gdk_color_parse ("yellow", &config.mem_color[2]);
  gdk_color_parse ("blue", &config.mem_color[3]);
  gdk_color_parse ("gray", &config.mem_color[4]);
  gdk_color_parse ("magenta", &config.mem_color[5]);
  GE_ASSERT (ectx, MAX_COLOR == 6);
  i = -1;
  while (stats[++i].paneName != NULL)
    {
      sys_box = create_sys_view (i, &config);
      if (sys_box == NULL)
        continue;               /* oops */

      label = gtk_label_new (gettext (stats[i].paneName));
      gtk_notebook_append_page (GTK_NOTEBOOK (notebook), sys_box, label);
    }
  gtk_widget_show (notebook);
}

void
done_stats ()
{
  done_functions ();
}


/* end of statistics.c */