ChartDirector Ver 5.0 (Python Edition)

Multi-Pointer Horizontal Meter




This example demonstrates a horizontal linear meter with multiple pointers.

ChartDirector supports adding arbitrary number of pointers to a meter using BaseMeter.addPointer. The shape of each pointer is configurable by using MeterPointer.setShape or MeterPointer.setShape2.

Source Code Listing

[Standalone Version] pythondemo\multihmeter.py
#!/usr/bin/python
from pychartdir import *

# The values to display on the meter
value0 = 30.99
value1 = 45.35
value2 = 77.64

# Create an LinearMeter object of size 250 x 75 pixels, using silver background with
# a 2 pixel black 3D depressed border.
m = LinearMeter(250, 75, silverColor(), 0, -2)

# Set the scale region top-left corner at (15, 25), with size of 220 x 20 pixels. The
# scale labels are located on the top (implies horizontal meter)
m.setMeter(15, 25, 220, 20, Top)

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

# Set 0 - 50 as green (99ff99) zone, 50 - 80 as yellow (ffff66) zone, and 80 - 100 as
# red (ffcccc) zone
m.addZone(0, 50, '0x99ff99')
m.addZone(50, 80, '0xffff66')
m.addZone(80, 100, '0xffcccc')

# Add deep red (000080), deep green (008000) and deep blue (800000) pointers to
# reflect the values
m.addPointer(value0, '0x000080')
m.addPointer(value1, '0x008000')
m.addPointer(value2, '0x800000')

# Add a label at bottom-left (10, 68) using Arial Bold/8 pts/red (c00000)
m.addText(10, 68, "Temp C", "arialbd.ttf", 8, '0xc00000', BottomLeft)

# Add three text boxes to show the values in this meter
m.addText(148, 70, m.formatValue(value0, "2"), "arial.ttf", 8, '0x6666ff',
    BottomRight).setBackground(0, 0, -1)
m.addText(193, 70, m.formatValue(value1, "2"), "arial.ttf", 8, '0x33ff33',
    BottomRight).setBackground(0, 0, -1)
m.addText(238, 70, m.formatValue(value2, "2"), "arial.ttf", 8, '0xff3333',
    BottomRight).setBackground(0, 0, -1)

# Output the chart
m.makeChart("multihmeter.png")

[CGI Version] pythondemo_cgi\multihmeter.py
#!/usr/bin/python
from pychartdir import *

# The values to display on the meter
value0 = 30.99
value1 = 45.35
value2 = 77.64

# Create an LinearMeter object of size 250 x 75 pixels, using silver background with
# a 2 pixel black 3D depressed border.
m = LinearMeter(250, 75, silverColor(), 0, -2)

# Set the scale region top-left corner at (15, 25), with size of 220 x 20 pixels. The
# scale labels are located on the top (implies horizontal meter)
m.setMeter(15, 25, 220, 20, Top)

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

# Set 0 - 50 as green (99ff99) zone, 50 - 80 as yellow (ffff66) zone, and 80 - 100 as
# red (ffcccc) zone
m.addZone(0, 50, '0x99ff99')
m.addZone(50, 80, '0xffff66')
m.addZone(80, 100, '0xffcccc')

# Add deep red (000080), deep green (008000) and deep blue (800000) pointers to
# reflect the values
m.addPointer(value0, '0x000080')
m.addPointer(value1, '0x008000')
m.addPointer(value2, '0x800000')

# Add a label at bottom-left (10, 68) using Arial Bold/8 pts/red (c00000)
m.addText(10, 68, "Temp C", "arialbd.ttf", 8, '0xc00000', BottomLeft)

# Add three text boxes to show the values in this meter
m.addText(148, 70, m.formatValue(value0, "2"), "arial.ttf", 8, '0x6666ff',
    BottomRight).setBackground(0, 0, -1)
m.addText(193, 70, m.formatValue(value1, "2"), "arial.ttf", 8, '0x33ff33',
    BottomRight).setBackground(0, 0, -1)
m.addText(238, 70, m.formatValue(value2, "2"), "arial.ttf", 8, '0xff3333',
    BottomRight).setBackground(0, 0, -1)

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