#!/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 = 50

# The main color of the four meters in this example. The other colors and gradients are derived from
# the main color.
colorList = [0x007700, 0x770077, 0x0033dd, 0x880000]
mainColor = colorList[chartIndex]

#
# In this example, we demonstrate how to parameterized by size, so that the chart size can be
# changed by changing just one variable.
#
size = 300

# The radius of the entire meter, which is size / 2, minus 2 pixels for margin
outerRadius = int(size / 2 - 2)

# The radius of the meter scale
scaleRadius = int(outerRadius * 92 / 100)

# The radius of the inner decorative circle
innerRadius = int(scaleRadius * 40 / 100)

# The width of the color scale
colorScaleWidth = int(scaleRadius * 10 / 100)

# Major tick length
tickLength = int(scaleRadius * 10 / 100)

# Major tick width
tickWidth = int(scaleRadius * 1 / 100 + 1)

# Label font size
fontSize = int(scaleRadius * 13 / 100)

#
# Create an angular meter based on the above parameters
#

# Create an AngularMeter object of the specified size. In this demo, we use black (0x000000) as the
# background color. You can also use transparent or other colors.
m = AngularMeter(size, size, 0x000000)

# Set the default text and line colors to white (0xffffff)
m.setColor(TextColor, 0xffffff)
m.setColor(LineColor, 0xffffff)

# Set meter center and scale radius, and set the scale angle from -180 to +90 degrees
m.setMeter(size / 2, size / 2, scaleRadius, -180, 90)

# Background gradient with the mainColor at the center and become darker near the border
bgGradient = [0, mainColor, 0.5, m.adjustBrightness(mainColor, 0.75), 1, m.adjustBrightness(
    mainColor, 0.15)]

# Fill the meter background with the background gradient
m.addRing(0, outerRadius, m.relativeRadialGradient(bgGradient, outerRadius * 0.66))

# Fill the inner circle with the same background gradient for decoration
m.addRing(0, innerRadius, m.relativeRadialGradient(bgGradient, innerRadius * 0.8))

# Gradient for the neon backlight, with the main color at the scale radius fading to transparent
neonGradient = [0.89, Transparent, 1, mainColor, 1.07, Transparent]
m.addRing(int(scaleRadius * 85 / 100), outerRadius, m.relativeRadialGradient(neonGradient))

# The neon ring at the scale radius with width equal to 1/80 of the scale radius, creating using a
# brighter version of the main color
m.addRing(scaleRadius, int(scaleRadius + scaleRadius / 80), m.adjustBrightness(mainColor, 2))

# Meter scale is 0 - 100, with major/minor/micro ticks every 10/5/1 units
m.setScale(0, 100, 10, 5, 1)

# Set the scale label style, tick length and tick width. The minor and micro tick lengths are 80%
# and 60% of the major tick length, and their widths are around half of the major tick width.
m.setLabelStyle("ariali.ttf", fontSize)
m.setTickLength( - tickLength,  - int(tickLength * 80 / 100),  - int(tickLength * 60 / 100))
m.setLineWidth(0, tickWidth, int((tickWidth + 1) / 2), int((tickWidth + 1) / 2))

# Demostrate different types of color scales and glare effects and putting them at different
# positions.
smoothColorScale = [0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000]
stepColorScale = [0, 0x00dd00, 60, 0xddaa00, 80, 0xdd0000, 100]
highColorScale = [70, Transparent, 100, 0xff0000]

if chartIndex == 1 :
    # Add the smooth color scale just outside the inner circle
    m.addColorScale(smoothColorScale, innerRadius + 1, colorScaleWidth)
    # Add glare up to the scale radius, concave and spanning 190 degrees
    m.addGlare(scaleRadius, -190)
elif chartIndex == 2 :
    # Add the high color scale at the default position
    m.addColorScale(highColorScale)
    # Add glare up to the scale radius
    m.addGlare(scaleRadius)
else :
    # Add the step color scale just outside the inner circle
    m.addColorScale(stepColorScale, innerRadius + 1, colorScaleWidth)
    # Add glare up to the scale radius, concave and spanning 190 degrees and rotated by -45 degrees
    m.addGlare(scaleRadius, -190, -45)

# Add a red (0xff0000) pointer at the specified value
m.addPointer2(value, 0xff0000)

# Set the cap background to a brighter version of the mainColor, and using black (0x000000) for the
# cap and grey (0x999999) for the cap border
m.setCap2(m.adjustBrightness(mainColor, 1.1), 0x000000, 0x999999)

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

