#!/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 250 x 75 pixels with very light grey (0xeeeeee) backgruond and
# a light grey (0xccccccc) 3-pixel thick rounded frame
m = LinearMeter(70, 260, 0xeeeeee, 0xcccccc)
m.setRoundedFrame(Transparent)
m.setThickFrame(3)

# Set the scale region top-left corner at (28, 30), with size of 20 x 196 pixels. The scale labels
# are located on the left (default - implies vertical meter)
m.setMeter(28, 30, 20, 196)

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

# Demostrate different types of color scales and putting them at different positions
smoothColorScale = [0, 0x6666ff, 25, 0x00bbbb, 50, 0x00ff00, 75, 0xffff00, 100, 0xff0000]
stepColorScale = [0, 0x33ff33, 50, 0xffff33, 80, 0xff3333, 100]
highLowColorScale = [0, 0x6666ff, 70, Transparent, 100, 0xff0000]

if chartIndex == 0 :
    # Add the smooth color scale at the default position
    m.addColorScale(smoothColorScale)
elif chartIndex == 1 :
    # Add the step color scale at the default position
    m.addColorScale(stepColorScale)
elif chartIndex == 2 :
    # Add the high low scale at the default position
    m.addColorScale(highLowColorScale)
elif chartIndex == 3 :
    # Add the smooth color scale starting at x = 28 (left of scale) with zero width and ending at x
    # = 28 with 20 pixels width
    m.addColorScale(smoothColorScale, 28, 0, 28, 20)
elif chartIndex == 4 :
    # Add the smooth color scale starting at x = 38 (center of scale) with zero width and ending at
    # x = 28 with 20 pixels width
    m.addColorScale(smoothColorScale, 38, 0, 28, 20)
else :
    # Add the smooth color scale starting at x = 48 (right of scale) with zero width and ending at x
    # = 28 with 20 pixels width
    m.addColorScale(smoothColorScale, 48, 0, 28, 20)

# In this demo, we demostrate pointers of different shapes
if chartIndex < 3 :
    # Add a blue (0x0000cc) pointer of default shape at the specified value
    m.addPointer(value, 0x0000cc)
else :
    # Add a blue (0x0000cc) pointer of triangular shape the specified value
    m.addPointer(value, 0x0000cc).setShape(TriangularPointer, 0.7, 0.5)

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

# 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))

