#!/usr/bin/python
from pychartdir import *
import cgi, sys

# Get HTTP query parameters
query = cgi.FieldStorage()

# This script can draw different charts depending on the chartIndex
chartIndex = int(query["img"].value)

# The value to display on the meter
value = 75.35

# Create a LinearMeter object of size 260 x 80 pixels with very light grey (0xeeeeee) backgruond and
# a light grey (0xccccccc) 3-pixel thick rounded frame
m = LinearMeter(260, 80, 0xeeeeee, 0xaaaaaa)
m.setRoundedFrame(Transparent)
m.setThickFrame(3)

# Set the scale region top-left corner at (18, 24), with size of 222 x 20 pixels. The scale labels
# are located on the top (implies horizontal meter)
m.setMeter(18, 24, 222, 20, Top)

# Set meter scale from 0 - 100, with a tick every 10 units
m.setScale(0, 100, 10)

# Demostrate different types of color scales
smoothColorScale = [0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000]
stepColorScale = [0, 0x00dd00, 50, 0xffff00, 80, 0xff0000, 100]
highLowColorScale = [0, 0x0000ff, 40, Transparent, 60, Transparent, 100, 0xff0000]
highColorScale = [70, Transparent, 100, 0xff0000]

if chartIndex == 0 :
    # Add a blue (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
    m.addBar(0, value, 0x0088ff, glassEffect(NormalGlare, Top), 4)
    # Add a 5-pixel thick smooth color scale at y = 48 (below the meter scale)
    m.addColorScale(smoothColorScale, 48, 5)
elif chartIndex == 1 :
     # Add a green (0x00cc00) bar from 0 to value with bar lighting effect
    m.addBar(0, value, 0x00cc00, barLighting())
    # Add a 5-pixel thick step color scale at y = 48 (below the meter scale)
    m.addColorScale(stepColorScale, 48, 5)
elif chartIndex == 2 :
    # Add a purple (0x8833dd) bar from 0 to value with glass effect and 4 pixel rounded corners
    m.addBar(0, value, 0x8833dd, glassEffect(NormalGlare, Top), 4)
    # Add a 5-pixel thick high/low color scale at y = 48 (below the meter scale)
    m.addColorScale(highLowColorScale, 48, 5)
elif chartIndex == 3 :
      # Add an orange (0xff8800) bar from 0 to value with cylinder lighting effect
    m.addBar(0, value, 0xff8800, cylinderEffect())
    # Add a high only color scale at y = 48 (below the meter scale) with thickness varying from 0 to
    # 8
    m.addColorScale(highColorScale, 48, 0, 48, 8)
elif chartIndex == 4 :
    # Add a red (0xee3333) bar from 0 to value with glass effect and 4 pixel rounded corners
    m.addBar(0, value, 0xee3333, glassEffect(NormalGlare, Top), 4)
    # Add a 5-pixel thick smooth color scale at y = 48 (below the meter scale)
    m.addColorScale(smoothColorScale, 48, 5)
else :
    # Add a grey (0xaaaaaa) bar from 0 to value
    m.addBar(0, value, 0xaaaaaa)
    # Add a 5-pixel thick step color scale at y = 48 (below the meter scale)
    m.addColorScale(stepColorScale, 48, 5)

# Add a label right aligned to (243, 65) using 8pt Arial Bold font
m.addText(243, 65, "Temperature C", "arialbd.ttf", 8, TextColor, Right)

# Add a text box left aligned to (18, 65). Display the value using white (0xffffff) 8pt Arial Bold
# font on a black (0x000000) background with depressed rounded border.
t = m.addText(18, 65, m.formatValue(value, "2"), "arial.ttf", 8, 0xffffff, Left)
t.setBackground(0x000000, 0x000000, -1)
t.setRoundedCorners(3)

# Output the chart
print("Content-type: image/png\n")
binaryPrint(m.makeChart2(PNG))

