#!/usr/bin/env python
# Copyright (C) 2007, Eduardo Silva (edsiper@gmail.com).
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import sys
import gtk
import string
import gobject
import drwarea
import procmem
class CPU_Usage:
CPU_HZ = 0
last_jiffies = 0
times = 0
def __init__(self):
self.CPU_hz = os.sysconf(2)
def _get_CPU_data(self):
# Uptime info
stat_file = "/proc/stat"
try:
infile = file(stat_file, "r")
except:
print "Error trying uptime file"
return -1
stat_line = infile.readline()
cpu_info = string.split(stat_line, ' ')
infile.close()
return cpu_info
def _get_CPU_usage(self):
cpu_info = self._get_CPU_data()
used_jiffies = (int(cpu_info[2]) + int(cpu_info[3]) + int(cpu_info[4]))
if self.times ==0:
self.last_jiffies = used_jiffies
self.times +=1
return True
new_ujiffies = (used_jiffies - self.last_jiffies)
new_ajiffies = ((self.frequency/1000) * self.CPU_hz)
if new_ajiffies <= 0:
pcpu = 0.0
else:
pcpu = ((new_ujiffies*100)/new_ajiffies)
if pcpu >100:
pcpu = 100
self.times +=1
self.last_jiffies = used_jiffies
return pcpu
class XO_CPU(gtk.Frame):
context = None
frequency_timer = 1
graph_offset = 7
def __init__(self):
gtk.Frame.__init__(self, 'System CPU Usage')
self.set_border_width(10)
self._updated = False
self.drw_width = (gtk.gdk.screen_width() * 99 / 100) - 50
self.drw_height = (gtk.gdk.screen_height() * 15 / 100) - 20
self.y_cpu = self.drw_height - self.graph_offset
self._cpu = 0
self._cpu_buffer = [0]
self._drawingarea = gtk.DrawingArea()
self._drawingarea.set_size_request(self.drw_width, self.drw_height)
self._drawingarea.connect("expose-event", self.do_expose)
self.dat = drwarea.Drawing_Area_Tools(self._drawingarea)
fixed = gtk.Fixed()
fixed.set_border_width(10)
fixed.add(self._drawingarea)
self.add(fixed)
self._DRW_CPU = CPU_Usage()
self._DRW_CPU.frequency = 1000 # 1 Second
gobject.timeout_add(self._DRW_CPU.frequency, self._update_cpu_usage)
def _update_cpu_usage(self):
redraw_all = False
# end of the drawing area
if ((self.frequency_timer + 1)*self.graph_offset) >= (self.drw_width - self.graph_offset):
self.frequency_timer = 1
self._cpu_buffer = [self._cpu_buffer[-1]]
redraw_all = True
length = 1
else:
length = len(self._cpu_buffer) - 1
self._cpu = self._DRW_CPU._get_CPU_usage()
self._cpu_buffer.append(self._cpu)
self._updated = True
if redraw_all:
area_x = 0
area_width = self.drw_width
else:
area_x = (length*self.graph_offset)
area_width = self.graph_offset*2
self._drawingarea.queue_draw_area(area_x, 0, area_width, self.drw_height - 5)
self.frequency_timer += 1
return True
def _get_y_cpu(self, pcpu):
height = (self.dat.range_y['to']) - (self.dat.range_y['from'])
# Get percent of cpu usage
y_value = (height - ((pcpu*height)/100) + 4)
return int(y_value)
def do_expose(self, widget, event):
context = widget.window.cairo_create()
context.rectangle(0, 0, self.dat.width - 1, self.dat.height - 1)
context.set_source_rgb (0,0,0)
context.fill_preserve()
if event.area.x == 0:
draw_all = True
else:
draw_all = False
context.rectangle(event.area.x, event.area.y, event.area.width, event.area.height)
context.clip()
# Drawing horizontal and vertical border lines
self.dat.draw_border_lines(context)
# Drawing grid
line_margin = self.dat.margin
context.set_source_rgb(1, 1, 1)
context.set_line_width(1)
#self.draw_grid(context, event, line_margin + 1, line_margin + 1, self.dat.width - line_margin - 2, self.dat.height - line_margin - 2)
self._draw_buffer(event, widget, context, draw_all)
cpu_label = str(round(self._cpu, 4))
self.set_label('System CPU Usage: ' + cpu_label + ' %')
self._updated = False
return False
# Draw a grid
def draw_grid(self, context, event, init_x, init_y, end_x, end_y):
x_range = (end_x - init_x) + 5
y_range = (end_y - init_y) + 1
current_y = init_y
context.set_line_width(0.3)
#for y in range(y_range):
for y in range(0, y_range, 20):
if (y%20) == 0:
context.move_to(init_x, y)
context.line_to(end_x, y)
for x in range(0, x_range, 20):
if (x%20) == 0:
context.move_to(x, init_y)
context.line_to(x, end_y)
context.stroke()
def check_context(self, event, offset, length, freq):
print "CONTEXT ALLOWED - from: " + str(event.area.x) + " to: " + str(event.area.x+event.area.width)
if event.area.x != (freq*self.graph_offset):
print "************************"
print " ERROR DRAWING CONTEXT"
print " ---> Area X: " + str(event.area.x) + " To X: " + str(freq*self.graph_offset)
print "************************"
def _draw_buffer(self, event, drwarea, context, draw_all=True):
buffer_offset = 0
freq = 1 # Frequency timer
length = len(self._cpu_buffer)
if length == 0:
return
# Context properties
context.set_line_width(2)
context.set_source_rgb(0,1,0)
if draw_all == True:
buffer_offset = 0
freq = 0
else:
freq = buffer_offset = (event.area.x/self.graph_offset)
for pcpu in self._cpu_buffer[buffer_offset:length]:
if buffer_offset == 0:
from_y = self.drw_height - self.graph_offset
from_x = self.graph_offset
else:
from_y = self._get_y_cpu(self._cpu_buffer[buffer_offset-1])
from_x = (freq * self.graph_offset)
to_x = (freq+1) * self.graph_offset
to_y = self._get_y_cpu(pcpu)
# Debug context, just for development
#self.check_context(event, buffer_offset, length, freq)
self.dat.draw_line(context, from_x, from_y, to_x, to_y)
buffer_offset+=1
freq+=1
context.stroke()