#!/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 = 74.25

# Create a LinearMeter object of size 70 x 260 pixels with very light grey (0xeeeeee) backgruond and
# a grey (0xbbbbbb) 3-pixel thick rounded frame
m = LinearMeter(70, 260, 0xeeeeee, 0xbbbbbb)
m.setRoundedFrame(Transparent)
m.setThickFrame(3)

# Set the scale region top-left corner at (28, 33), with size of 20 x 194 pixels. The scale labels
# are located on the left (default - implies vertical meter).
m.setMeter(28, 33, 20, 194)

# 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]
highColorScale = [70, Transparent, 100, 0xff0000]
lowColorScale = [0, 0x0000ff, 30, Transparent]

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, Left), 4)
    # Add a 6-pixel thick smooth color scale at x = 53 (right of meter scale)
    m.addColorScale(smoothColorScale, 53, 6)
elif chartIndex == 1 :
     # Add a green (0x00cc00) bar from 0 to value with bar lighting effect and 4 pixel rounded
     # corners
    m.addBar(0, value, 0x00cc00, barLighting(), 4)
    # Add a high only color scale at x = 52 (right of meter scale) with thickness varying from 0 to
    # 8
    m.addColorScale(highColorScale, 52, 0, 52, 8)
    # Add a low only color scale at x = 52 (right of meter scale) with thickness varying from 8 to 0
    m.addColorScale(lowColorScale, 52, 8, 52, 0)
elif chartIndex == 2 :
    # Add a purple (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
    m.addBar(0, value, 0x8833dd, glassEffect(NormalGlare, Left), 4)
    # Add a high only color scale at x = 52 (right of meter scale) with thickness varying from 0 to
    # 8
    m.addColorScale(highColorScale, 52, 0, 52, 8)
elif chartIndex == 3 :
     # Add a orange (0xff8800) bar from 0 to value with cylinder lighting effect
    m.addBar(0, value, 0xff8800, cylinderEffect())
    # Add a high only color scale at x = 53 (right of meter scale)
    m.addColorScale(highColorScale, 53, 6)
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, Left), 4)
    # Add a step color scale at x = 53 (right of meter scale)
    m.addColorScale(stepColorScale, 53, 6)
else :
     # Add a grey (0xaaaaaa) bar from 0 to value
    m.addBar(0, value, 0xaaaaaa)
    # Add a smooth color scale at x = 52 (right of meter scale) with thickness varying from 0 to 8
    m.addColorScale(smoothColorScale, 52, 0, 52, 8)

# Add a title using 8pt Arial Bold font with grey (0xbbbbbb) background
m.addTitle("Temp C", "arialbd.ttf", 8, TextColor).setBackground(0xbbbbbb)

# Add a text box at the bottom-center. Display the value using white (0xffffff) 8pt Arial Bold font
# on a black (0x000000) background with rounded border.
t = m.addText(m.getWidth() / 2, m.getHeight() - 8, m.formatValue(value, "2"), "arialbd.ttf", 8,
    0xffffff, Bottom)
t.setBackground(0x000000)
t.setRoundedCorners(3)
t.setMargin2(5, 5, 2, 1)

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

