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 Meter widget draws a linear 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 H_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_values, raw_limits, raw_zones, =
attribute_name, field_names, file_name, resolution, p_length, s_length, =
*args, **kwargs): =20
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( ((raw_limits[2]/raw_limits[3]) % 1.0) * raw_limits[3] =
=3D=3D 0 ): #There must be an integer number of minor ticks for each =
major tick
raise ValueError('bad_tick_spacing_exception')
if( raw_limits[2] <=3D 0 or raw_limits[3] <=3D 0 or =
raw_limits[2] < raw_limits[3] or raw_limits[3] > =
abs(raw_limits[1]-raw_limits[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
#Adjust the scaling
self.scaled_limits =3D []
for limit in raw_limits:
self.scaled_limits.append( limit * p_length / =
(raw_limits[1]-raw_limits[0]))
=20
#Stuff all of the variables into self.
self.vertical =3D vertical
self.raw_values =3D raw_values
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 =
((self.scaled_limits[1]+self.scaled_limits[0])/2)
for zone in raw_zones:
self.draw_bar( zone, False)
self.draw_bar( None, True)
self.draw_dividers()
self.draw_ticks()
self.draw_needle()
if( vertical ):
self.text( self.s_length/2, self.scaled_limits[1]+0.05, =
self.attribute_name, size=3D12, va=3D'bottom', ha=3D'center')
else:
self.text( self.graph_center, self.s_length+0.05, =
self.attribute_name, size=3D12, va=3D'bottom', ha=3D'center')
=20
def draw_bar( self, zone, border):
if( border ):
start =3D self.scaled_limits[0]
end =3D self.scaled_limits[1]
else:
start =3D (zone[0] * self.p_length / =
(self.raw_limits[1]-self.raw_limits[0]))
end =3D (zone[1] * self.p_length / =
(self.raw_limits[1]-self.raw_limits[0]))
colour =3D zone[2]
=20
if( not self.graph_positive ):
start =3D -start
end =3D -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_dividers( self ):
i =3D 1
num_fields =3D len(self.raw_values)
while( i < num_fields ):
s_vect =3D [
(i * self.s_length)/num_fields,
(i * self.s_length)/num_fields,
]
p_vect =3D [
self.scaled_limits[0],
self.scaled_limits[1],
]
if( self.vertical ):
self.plot(s_vect, p_vect, 'b-', color=3D'black', =
linewidth=3D1.0)
else:
self.plot(p_vect, s_vect, 'b-', color=3D'black', =
linewidth=3D1.0)
i +=3D 1=20
=20
def draw_needle( self ):
i =3D 0 =20
for raw_value in self.raw_values:
=20
if( raw_value =3D=3D None ):
if( self.vertical ):
self.text( ((i + 1) * =
self.s_length)/len(self.raw_values),(self.scaled_limits[0]-0.05), "%s : =
N/A" % self.field_names[i], size=3D10, va=3D'top', ha=3D'right', =
rotation=3D45)
else:
self.text( (self.scaled_limits[0] - 0.05), ((i + =
0.5) * self.s_length)/len(self.raw_values), "%s : N/A" % =
self.field_names[i], size=3D10, va=3D'center', ha=3D'right')
else:
=20
#Clamp the value to the limits
value =3D raw_value * self.p_length / =
(self.raw_limits[1]-self.raw_limits[0])
if( raw_value < self.raw_limits[0] ):
value =3D self.raw_limits[0] * self.p_length / =
(self.raw_limits[1]-self.raw_limits[0])
if( raw_value > self.raw_limits[1] ):
value =3D self.raw_limits[1] * self.p_length / =
(self.raw_limits[1]-self.raw_limits[0])
=20
if( self.vertical ):
self.text( ((i + 1) * =
self.s_length)/len(self.raw_values),(self.scaled_limits[0] - 0.05), "%s =
: %.2f" % (self.field_names[i], raw_value), size=3D10, va=3D'top', =
ha=3D'right', rotation=3D45)=20
else:
self.text( (self.scaled_limits[0] - 0.05), ((i + =
0.5) * self.s_length)/len(self.raw_values), "%s : %.2f" % =
(self.field_names[i], raw_value), size=3D10, va=3D'center', =
ha=3D'right')=20
=20
if( not self.graph_positive ):
value =3D -value
=20
s_vect =3D [
((i + 0 ) * self.s_length)/len(self.raw_values),
((i + 0.5) * self.s_length)/len(self.raw_values),
((i + 1 ) * self.s_length)/len(self.raw_values),
((i + 0.5) * self.s_length)/len(self.raw_values),
]
p_vect =3D [
value,
value - 0.05,
value,
value + 0.05,
]
=20
if( self.vertical ):
self.fill(s_vect, p_vect, 'b', alpha=3D0.4)
else:
self.fill(p_vect, s_vect, 'b', alpha=3D0.4)
i +=3D 1
=20
=20
def draw_ticks( self ):
num_fields =3D len(self.raw_values)
if( self.graph_positive ):
offset =3D self.scaled_limits[0]
else:
offset =3D self.scaled_limits[1]
i =3D 0
j =3D self.raw_limits[0]
while( i*self.scaled_limits[3] + self.scaled_limits[0] <=3D =
self.scaled_limits[1] ):
if( i % (self.scaled_limits[2]/self.scaled_limits[3]) =3D=3D =
0):
tick_length =3D self.s_length
if( self.vertical ):
if( type(self.raw_limits[2]) is types.FloatType ):
self.text( -0.05, offset, "%.2f" % j, size=3D10, =
va=3D'center', ha=3D'right')=20
else:
self.text( -0.05, offset, "%d" % int(j), =
size=3D10, va=3D'center', ha=3D'right')
else:
if( type(self.raw_limits[2]) is types.FloatType ):
self.text( offset, -0.05, "%.2f" % j, size=3D10, =
va=3D'top', ha=3D'center')=20
else:
self.text( offset, -0.05, "%d" % int(j), =
size=3D10, va=3D'top', ha=3D'center')=20
j +=3D self.raw_limits[2]
else:
tick_length =3D (self.s_length/num_fields) * 0.2
=20
s_vect =3D [ 0.0, tick_length ]
p_vect =3D [ offset, offset ]
=20
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 1
if( self.graph_positive ):
offset +=3D self.scaled_limits[3]
else:
offset -=3D self.scaled_limits[3]
=20
if( i % (self.scaled_limits[2]/self.scaled_limits[3]) =3D=3D 0):
if( self.vertical ):
if( type(self.raw_limits[2]) is types.FloatType ):
self.text( -0.01, offset, "%.2f" % j, size=3D10, =
va=3D'top', ha=3D'center')=20
else:
self.text( -0.01, offset, "%d" % int(j), size=3D10, =
va=3D'top', ha=3D'center')=20
else:
if( type(self.raw_limits[2]) is types.FloatType ):
self.text( offset, -0.1, "%.2f" % j, size=3D10, =
va=3D'top', ha=3D'center')=20
else:
self.text( offset, -0.1, "%d" % int(j), size=3D10, =
va=3D'top', ha=3D'center')=20
=20
def make_widget( vertical, raw_values, raw_limits, raw_zones, =
attribute_name, field_names, file_name, resolution=3D72 ):
from pylab import figure, show, savefig
=20
p_length =3D 4.0 # Length of the Primary axis
s_length =3D 0.3 * len(raw_values) # Length of the Secondary axis
=20
if( vertical ):=20
fig_height =3D p_length + 1.6
fig_width =3D s_length + 1.1
fig =3D figure( figsize=3D(fig_width, fig_height) )
rect =3D [(0.9/fig_width), (1.3/fig_height), =
(s_length/fig_width), (p_length/fig_height)]
meter =3D Meter(vertical, raw_values,=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 + 0.5
fig_width =3D p_length + 1.9
fig =3D figure( figsize=3D(fig_width, fig_height) )
rect =3D [(1.7/fig_width), (0.2/fig_height), =
(p_length/fig_width), (s_length/fig_height)]
meter =3D Meter(vertical, raw_values,=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( False, [-3.0, 6.0, None, 0.25], [-10.0,10.0,5,1], =
[[-10.0,0.0,'r'],[0.0,5.0,'y'],[5.0,10.0,'g']], "Rx MOS (24h)", ['WLL to =
LAS','LAS to WLL','WLL to LAS','LAS to WLL'], 'multimeter.png', 100)
''' =20
=20
if __name__=3D=3D'__main__':
from pylab import figure, show, savefig
=20
vertical =3D False =20
=20
raw_values =3D [-3.0, 6.0, None, 0.25]
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)"
field_names =3D ['WLL to LAS','LAS to WLL','WLL to LAS','LAS to =
WLL']
=20
p_length =3D 4.0 # Length of the Primary axis
s_length =3D 0.3 * len(raw_values) # Length of the Secondary axis
=20
if( vertical ):=20
fig_height =3D p_length + 1.6
fig_width =3D s_length + 1.1
fig =3D figure( figsize=3D(fig_width, fig_height) )
rect =3D [(0.9/fig_width), (1.3/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 + 0.5
fig_width =3D p_length + 1.9
fig =3D figure( figsize=3D(fig_width, fig_height) )
rect =3D [(1.7/fig_width), (0.2/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('multimeter',dpi=3D72)
'''