Square Angular Meters

pythondemo\squareameter.py
#!/usr/bin/python

# The ChartDirector for Python module is assumed to be in "../lib"
import sys, os
sys.path.insert(0, os.path.join(os.path.abspath(sys.path[0]), "..", "lib"))

from pychartdir import *

def createChart(chartIndex) :

    # The value to display on the meter
    value = 4.75

    # Create an AugularMeter object of size 110 x 110 pixels, using silver background color with a
    # black 2 pixel 3D depressed border.
    m = AngularMeter(110, 110, silverColor(), 0x000000, -2)

    # Set meter appearance according to a parameter
    if chartIndex == 0 :
        # Set the meter center at bottom left corner (15, 95), with radius 85 pixels. Meter spans
        # from 90 - 0 degrees.
        m.setMeter(15, 95, 85, 90, 0)
        # Add a label to the meter centered at (35, 75)
        m.addText(35, 75, "VDC", "Arial Bold", 12, TextColor, Center)
        # Add a text box to show the value at top right corner (103, 7)
        m.addText(103, 7, m.formatValue(value, "2"), "Arial", 8, 0xffffff, TopRight).setBackground(
            0, 0, -1)
    elif chartIndex == 1 :
        # Set the meter center at top left corner (15, 15), with radius 85 pixels. Meter spans from
        # 90 - 180 degrees.
        m.setMeter(15, 15, 85, 90, 180)
        # Add a label to the meter centered at (35, 35)
        m.addText(35, 35, "AMP", "Arial Bold", 12, TextColor, Center)
        # Add a text box to show the value at bottom right corner (103, 103)
        m.addText(103, 103, m.formatValue(value, "2"), "Arial", 8, 0xffffff, BottomRight
            ).setBackground(0, 0, -1)
    elif chartIndex == 2 :
        # Set the meter center at top right corner (15, 95), with radius 85 pixels. Meter spans from
        # 270 - 180 degrees.
        m.setMeter(95, 15, 85, 270, 180)
        # Add a label to the meter centered at (75, 35)
        m.addText(75, 35, "KW", "Arial Bold", 12, TextColor, Center)
        # Add a text box to show the value at bottom left corner (7, 103)
        m.addText(7, 103, m.formatValue(value, "2"), "Arial", 8, 0xffffff, BottomLeft
            ).setBackground(0, 0, -1)
    else :
        # Set the meter center at bottom right corner (95, 95), with radius 85 pixels. Meter spans
        # from 270 - 360 degrees.
        m.setMeter(95, 95, 85, 270, 360)
        # Add a label to the meter centered at (75, 75)
        m.addText(75, 75, "RPM", "Arial Bold", 12, TextColor, Center)
        # Add a text box to show the value at top left corner (7, 7)
        m.addText(7, 7, m.formatValue(value, "2"), "Arial", 8, 0xffffff, TopLeft).setBackground(0,
            0, -1)

    # Meter scale is 0 - 10, with a major tick every 2 units, and minor tick every 1 unit
    m.setScale(0, 10, 2, 1)

    # Set 0 - 6 as green (99ff99) zone, 6 - 8 as yellow (ffff00) zone, and 8 - 10 as red (ff3333)
    # zone
    m.addZone(0, 6, 0x99ff99, 0x808080)
    m.addZone(6, 8, 0xffff00, 0x808080)
    m.addZone(8, 10, 0xff3333, 0x808080)

    # Add a semi-transparent black (80000000) pointer at the specified value
    m.addPointer(value, 0x80000000)

    # Output the chart
    m.makeChart("squareameter%s.png" % chartIndex)


createChart(0)
createChart(1)
createChart(2)
createChart(3)