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/*
* CPU usage plugin to fbpanel
*
* Copyright (C) 2004 by Alexandre Pereira da Silva <alexandre.pereira@poli.usp.br>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/*A little bug fixed by Mykola <mykola@2ka.mipt.ru>:) */
#include <string.h>
#include <sys/time.h>
#include <time.h>
#include <sys/sysinfo.h>
#include <stdlib.h>
#include "plugin.h"
#include "panel.h"
#include "gtkbgbox.h"
#define KILOBYTE 1024
#define MAX_WGSIZE 100
//#define DEBUG
#include "dbg.h"
typedef unsigned long tick;
struct cpu_stat {
tick u, n, s, i;
};
typedef struct {
GdkGC *gc_cpu;
GdkColor *ccpu;
GtkWidget *da;
GtkWidget *evbox;
GdkPixmap *pixmap;
GtkTooltips *tip;
int timer;
tick *stats_cpu;
unsigned int ini_stats;
int Wwg;
int Hwg;
struct cpu_stat cpu_anterior;
} cpu_t;
static int
cpu_update(cpu_t *c)
{
int cpu_u=0, cpu_s=0, cpu_n=0, cpu_i=100;
unsigned int i;
struct cpu_stat cpu, cpu_r;
FILE *stat;
float total;
ENTER;
if(!c->pixmap)
RET(TRUE);
stat = fopen("/proc/stat", "r");
if(!stat)
RET(TRUE);
fscanf(stat, "cpu %lu %lu %lu %lu", &cpu.u, &cpu.n, &cpu.s, &cpu.i);
fclose(stat);
cpu_r.u = cpu.u - c->cpu_anterior.u;
cpu_r.n = cpu.n - c->cpu_anterior.n;
cpu_r.s = cpu.s - c->cpu_anterior.s;
cpu_r.i = cpu.i - c->cpu_anterior.i;
total = cpu_r.u + cpu_r.n + cpu_r.s + cpu_r.i;
cpu_u = cpu_r.u * c->Hwg / total;
cpu_s = cpu_r.n * c->Hwg / total;
cpu_n = cpu_r.s * c->Hwg / total;
cpu_i = cpu_r.i * c->Hwg / total;
c->cpu_anterior = cpu;
c->stats_cpu[c->ini_stats++] = cpu_u + cpu_s + cpu_n;
c->ini_stats %= c->Wwg;
gdk_draw_rectangle(c->pixmap, c->da->style->black_gc, TRUE, 0, 0, c->Wwg, c->Hwg);
for (i = 0; i < c->Wwg; i++) {
int val;
val = c->stats_cpu[(i + c->ini_stats) % c->Wwg];
if (val)
gdk_draw_line(c->pixmap, c->gc_cpu, i, c->Hwg, i, c->Hwg - val);
}
gtk_widget_queue_draw(c->da);
RET(TRUE);
}
static gint
configure_event(GtkWidget *widget, GdkEventConfigure *event, cpu_t *c)
{
ENTER;
if (c->pixmap)
g_object_unref(c->pixmap);
c->Wwg = widget->allocation.width;
c->Hwg = widget->allocation.height;
if (c->stats_cpu)
g_free(c->stats_cpu);
c->stats_cpu = g_new0( typeof(*c->stats_cpu), c->Wwg);
c->pixmap = gdk_pixmap_new (widget->window,
widget->allocation.width,
widget->allocation.height,
-1);
gdk_draw_rectangle (c->pixmap,
widget->style->black_gc,
TRUE,
0, 0,
widget->allocation.width,
widget->allocation.height);
RET(TRUE);
}
static gint
expose_event(GtkWidget *widget, GdkEventExpose *event, cpu_t *c)
{
ENTER;
gdk_draw_drawable (widget->window,
c->da->style->black_gc,
c->pixmap,
event->area.x, event->area.y,
event->area.x, event->area.y,
event->area.width, event->area.height);
RET(FALSE);
}
static int
cpu_constructor(plugin *p)
{
cpu_t *c;
ENTER;
c = g_new0(cpu_t, 1);
p->priv = c;
c->da = gtk_drawing_area_new();
gtk_widget_set_size_request(c->da, 40, 30);
gtk_widget_show(c->da);
c->tip = gtk_tooltips_new();
c->gc_cpu = gdk_gc_new(p->panel->topgwin->window);
DBG("here1\n");
c->ccpu = (GdkColor *)malloc(sizeof(GdkColor));
gdk_color_parse("green", c->ccpu);
gdk_colormap_alloc_color(gdk_drawable_get_colormap(p->panel->topgwin->window), c->ccpu, FALSE, TRUE);
gdk_gc_set_foreground(c->gc_cpu, c->ccpu);
gtk_bgbox_set_background(p->pwid, BG_STYLE, 0, 0);
gtk_container_add(GTK_CONTAINER(p->pwid), c->da);
gtk_container_set_border_width (GTK_CONTAINER (p->pwid), 1);
g_signal_connect (G_OBJECT (c->da),"configure_event",
G_CALLBACK (configure_event), (gpointer) c);
g_signal_connect (G_OBJECT (c->da), "expose_event",
G_CALLBACK (expose_event), (gpointer) c);
c->timer = g_timeout_add(1000, (GSourceFunc) cpu_update, (gpointer) c);
RET(1);
}
static void
cpu_destructor(plugin *p)
{
cpu_t *c = (cpu_t *) p->priv;
ENTER;
g_object_unref(c->pixmap);
g_object_unref(c->gc_cpu);
g_free(c->stats_cpu);
g_free(c->ccpu);
g_source_remove(c->timer);
g_free(p->priv);
RET();
}
plugin_class cpu_plugin_class = {
fname: NULL,
count: 0,
type : "cpu",
name : "Cpu usage",
version: "1.0",
description : "Display cpu usage",
constructor : cpu_constructor,
destructor : cpu_destructor,
};
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