Hello,
A few posts back, I included source code to some gauges I had whipped =
together. After some constructive advice from John Hunter (Thanks!), =
I've had time to polish them a bit and include the logarithmic ones as =
promised.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D
#!/usr/bin/env python
"""
The Log_Meter widget draws a logarithmic meter, either horizontally or =
vertically. You supply the direction, limits,
shaded regions, names and the current value, and invoke it like this:
from pylab import figure, show
=20
raw_value =3D -4.0
raw_limits =3D [-10.0,10.0,5,1]
raw_zones =3D [[-10.0,0.0,'r'],[0.0,5.0,'y'],[5.0,10.0,'g']]
attribute_name =3D "Rx MOS (24h)"
=20
s_length =3D 0.3
p_length =3D 2.0
fig_height =3D s_length + 1.0
fig_width =3D p_length + 0.4
fig =3D figure( figsize=3D(fig_width, fig_height) )
=20
rect =3D [(0.2/fig_width), (0.5/fig_height),
(p_length/fig_width), (s_length/fig_height)]
=20
meter =3D Log_Meter(fig, rect,
xlim=3D( -0.1, p_length+0.1 ),
ylim=3D( -0.4, s_length+0.1 ),
xticks=3D[],
yticks=3D[],
)
meter.set_axis_off()
fig.add_axes(meter)
show()
"""
from __future__ import division
from matplotlib.figure import Figure
from matplotlib.axes import Axes
import math
import types
from math import pi
class Meter(Axes):
def __init__(self, vertical, raw_value, raw_limits, raw_zones, =
attribute_name, field_names, file_name, resolution, p_length, s_length, =
*args, **kwargs):
Axes.__init__(self, *args, **kwargs)
#Perform Checking
if( raw_limits[0] =3D=3D raw_limits[1] ):
raise ValueError('identical_limits_exception: %s' % =
raw_limits)
if( raw_limits[1] > raw_limits[0] ):
self.graph_positive =3D True
else: #Swap the limits around
self.graph_positive =3D False
raw_limits[0], raw_limits[1] =3D raw_limits[1] =3D =
raw_limits[0]
=20
if not( math.log10(raw_limits[0]) % 1.0 =3D=3D 0 and =
math.log10(raw_limits[1]) % 1.0 =3D=3D 0 ):
raise ValueError('bad_limits_exception:%s' % raw_limits)
for zone in raw_zones:
if( zone[0] > zone[1] ): #Swap the zones so zone[1] > =
zone[0]
zone[0], zone[1] =3D zone[1] =3D zone[0]
if( zone[1] < raw_limits[0] or zone[0] > raw_limits[1] =
):
raise ValueError('bad_zone_exception'%zone)
if( zone[0] < raw_limits[0] ):
zone[0] =3D raw_limits[0]
if( zone[1] > raw_limits[1] ):
zone[1] =3D raw_limits[1]
=20
=20
=20
#Stuff all of the variables into self.
self.vertical =3D vertical
self.raw_value =3D raw_value
self.raw_limits =3D raw_limits
self.raw_zones =3D raw_zones
self.attribute_name =3D attribute_name
self.field_names =3D field_names
self.file_name =3D file_name
self.resolution =3D resolution
self.p_length =3D p_length
self.s_length =3D s_length
=20
#Draw the meter
self.graph_center =3D =
((math.log10(self.raw_limits[0])+math.log10(self.raw_limits[1]))/2)
for zone in raw_zones:
self.draw_bar( zone, False)
self.draw_bar( None, True)
self.draw_ticks()
self.draw_needle()
if( vertical ):
self.text( self.s_length/2, =
math.log10(self.raw_limits[0])-0.2, self.attribute_name, size=3D12, =
va=3D'top', ha=3D'center')
else:
self.text( self.graph_center, self.s_length+0.25, =
self.attribute_name, size=3D12, va=3D'bottom', ha=3D'center')
=20
def draw_bar( self, zone, border ):
if( border ):
start =3D self.raw_limits[0]
end =3D self.raw_limits[1]
else:
start =3D zone[0]
end =3D zone[1]
colour =3D zone[2]
=20
if( self.graph_positive ):
start =3D math.log10(start)
end =3D math.log10(end)
else:
start =3D -math.log10(start)
end =3D -math.log10(end)
=20
s_vect =3D [ 0.0, 0.0, self.s_length, self.s_length ]
p_vect =3D [ start, end, end, start ]
=20
if( border ):
#Close the loop
p_vect.append(start)
s_vect.append(0.0)
if( self.vertical ):
p =3D self.plot(s_vect, p_vect, 'b-', color=3D'black', =
linewidth=3D1.5)
else:
p =3D self.plot(p_vect, s_vect, 'b-', color=3D'black', =
linewidth=3D1.5)
else:
if( self.vertical ):
p =3D self.fill(s_vect, p_vect, colour, linewidth=3D0.0, =
alpha=3D0.4)
else:
p =3D self.fill(p_vect, s_vect, colour, linewidth=3D0.0, =
alpha=3D0.4)
def draw_needle( self ):
if( self.raw_value =3D=3D None ):
if( self.vertical ):
self.text( (self.s_length + 0.05), self.graph_center, =
"N/A", size=3D10, va=3D'center', ha=3D'left')
else:
self.text( self.graph_center, (self.s_length + 0.05), =
"N/A", size=3D10, va=3D'bottom', ha=3D'center')
else:
#Clamp the value to the limits
value =3D math.log10(self.raw_value)
if( self.raw_value < self.raw_limits[0] ):
value =3D math.log10(self.raw_limits[0])
if( self.raw_value > self.raw_limits[1] ):
value =3D math.log10(self.raw_limits[1])
=20
if( self.vertical ):
self.text( (self.s_length + 0.05), value, "%.2f" % =
self.raw_value, size=3D10, va=3D'center', ha=3D'left')=20
else:
self.text( value, (self.s_length + 0.05), "%.2f" % =
self.raw_value, size=3D10, va=3D'bottom', ha=3D'center')=20
=20
if( not self.graph_positive ):
value =3D -value
s_vect =3D [ self.s_length/2, self.s_length, self.s_length ]
p_vect =3D [ value + 0.00, value - 0.1, value + 0.1 ]
=20
if( self.vertical ):
self.fill(s_vect, p_vect, 'black')
else:
self.fill(p_vect, s_vect, 'black')
=20
=20
def draw_ticks( self ):
i =3D self.raw_limits[0]
step =3D self.raw_limits[0]
while( i < self.raw_limits[1] ):
while( i < (step * 10) ):
value =3D math.log10(i)
if( not self.graph_positive ):
value =3D -value
mantissa =3D int(i / math.pow(10, =
math.ceil(math.log10(i))-1))
if( mantissa =3D=3D 10 or mantissa =3D=3D 1 ):
if( self.vertical ):
self.text( -0.05, value, "%g" % i, size=3D10, =
va=3D'center', ha=3D'right')
else: =20
self.text( value, -0.05, "%g" % i, size=3D10, =
va=3D'top', ha=3D'center')=20
tick_length =3D self.s_length
else:
tick_length =3D self.s_length * 0.2
s_vect =3D [ 0.0, tick_length ]
p_vect =3D [ value, value ]
if( self.vertical ):
p =3D self.plot(s_vect, p_vect, 'b-', linewidth=3D1, =
color=3D'black', alpha=3D0.2)
else:
p =3D self.plot(p_vect, s_vect, 'b-', linewidth=3D1, =
color=3D'black', alpha=3D0.2)
i +=3D step
i =3D step * 10
step =3D step * 10
i =3D self.raw_limits[1]
value =3D math.log10(i)
if( not self.graph_positive ):
value =3D -value
mantissa =3D int(i / math.pow(10, math.ceil(math.log10(i))-1))
if( mantissa =3D=3D 10 ):
if( self.vertical ):
self.text( -0.05, value, "%g" % i, size=3D10, =
va=3D'center', ha=3D'right')
else: =20
self.text( value, -0.05, "%g" % i, size=3D10, =
va=3D'top', ha=3D'center')=20
=20
=20
def make_widget( vertical, raw_value, raw_limits, raw_zones, =
attribute_name, field_names, file_name, resolution=3D72 ): =20
from pylab import figure, show, savefig
p_length =3D 2.0 # Length of the Primary axis
s_length =3D 0.3 # Length of the Secondary axis
=20
if( vertical ):=20
fig_height =3D p_length + 0.6
fig_width =3D s_length + 1.0
fig =3D figure( figsize=3D(fig_width, fig_height) )
rect =3D [(0.5/fig_width), (0.4/fig_height), =
(s_length/fig_width), (p_length/fig_height)]
meter =3D Meter(vertical, raw_value,=20
raw_limits, raw_zones,=20
attribute_name, field_names,=20
file_name, resolution,=20
p_length, s_length,
fig, rect,
xlim=3D( -0.2, s_length+0.1 ),
ylim=3D( -0.1, p_length+0.1 ),
xticks=3D[],
yticks=3D[]
)
else:
fig_height =3D s_length + 1.0
fig_width =3D p_length + 0.4
fig =3D figure( figsize=3D(fig_width, fig_height) )
rect =3D [(0.2/fig_width), (0.5/fig_height), =
(p_length/fig_width), (s_length/fig_height)]
meter =3D Meter(vertical, raw_value,=20
raw_limits, raw_zones,=20
attribute_name, field_names,=20
file_name, resolution,
p_length, s_length,
fig, rect,
xlim=3D( -0.1, p_length+0.1 ),
ylim=3D( -0.4, s_length+0.1 ),
xticks=3D[],
yticks=3D[],
)
=20
meter.set_axis_off()
fig.add_axes(meter)
# show()
fig.canvas.print_figure( file_name,dpi=3Dresolution ) =20
=20
=20
#make_widget( True, 0.01, [0.001,10.0], =
[[0.001,0.01,'r'],[0.01,0.1,'y'],[0.1,10.0,'g']], "Rx MOS (24h)", ['WLL =
to LAS','LAS to WLL','WLL to LAS','LAS to WLL'], 'log_meter.png', 100)
=20
''' =20
=20
if __name__=3D=3D'__main__':
from pylab import figure, show, savefig
=20
vertical =3D True =20
=20
raw_value =3D 0.1
raw_limits =3D [0.0001,10.0,5,1]
raw_zones =3D [[0.0001,0.001,'r'],[0.001,0.1,'y'],[0.1,10.0,'g']]
attribute_name =3D "Rx MOS (24h)"
=20
p_length =3D 2.0 # Length of the Primary axis
s_length =3D 0.3 # Length of the Secondary axis
=20
if( vertical ):=20
fig_height =3D p_length + 0.6
fig_width =3D s_length + 1.0
fig =3D figure( figsize=3D(fig_width, fig_height) )
rect =3D [(0.5/fig_width), (0.4/fig_height), =
(s_length/fig_width), (p_length/fig_height)]
meter =3D Meter(fig, rect,
xlim=3D( -0.2, s_length+0.1 ),
ylim=3D( -0.1, p_length+0.1 ),
xticks=3D[],
yticks=3D[],
)
else:
fig_height =3D s_length + 1.0
fig_width =3D p_length + 0.4
fig =3D figure( figsize=3D(fig_width, fig_height) )
rect =3D [(0.2/fig_width), (0.5/fig_height), =
(p_length/fig_width), (s_length/fig_height)]
meter =3D Meter(fig, rect,
xlim=3D( -0.1, p_length+0.1 ),
ylim=3D( -0.4, s_length+0.1 ),
xticks=3D[],
yticks=3D[],
)
=20
meter.set_axis_off()
fig.add_axes(meter)
# show()
fig.canvas.print_figure('log_meter',dpi=3D72)
'''