ChartDirector 6.0 (Python Edition)

Horizontal Linear Meter




This example demonstrates the basic steps in creating a horizontal linear meter.

A horizontal linear meter can be created using the following steps:

Source Code Listing

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

# The value to display on the meter
value = 74.25

# Create an LinearMeter object of size 250 x 65 pixels with a very light grey (0xeeeeee) background,
# and a rounded 3-pixel thick light grey (0xcccccc) border
m = LinearMeter(250, 65, 0xeeeeee, 0xcccccc)
m.setRoundedFrame(Transparent)
m.setThickFrame(3)

# Set the scale region top-left corner at (14, 23), with size of 218 x 20 pixels. The scale labels
# are located on the top (implies horizontal meter)
m.setMeter(14, 23, 218, 20, Top)

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

# Add a smooth color scale to the meter
smoothColorScale = [0, 0x6666ff, 25, 0x00bbbb, 50, 0x00ff00, 75, 0xffff00, 100, 0xff0000]
m.addColorScale(smoothColorScale)

# Add a blue (0x0000cc) pointer at the specified value
m.addPointer(value, 0x0000cc)

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

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

# The value to display on the meter
value = 74.25

# Create an LinearMeter object of size 250 x 65 pixels with a very light grey (0xeeeeee) background,
# and a rounded 3-pixel thick light grey (0xcccccc) border
m = LinearMeter(250, 65, 0xeeeeee, 0xcccccc)
m.setRoundedFrame(Transparent)
m.setThickFrame(3)

# Set the scale region top-left corner at (14, 23), with size of 218 x 20 pixels. The scale labels
# are located on the top (implies horizontal meter)
m.setMeter(14, 23, 218, 20, Top)

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

# Add a smooth color scale to the meter
smoothColorScale = [0, 0x6666ff, 25, 0x00bbbb, 50, 0x00ff00, 75, 0xffff00, 100, 0xff0000]
m.addColorScale(smoothColorScale)

# Add a blue (0x0000cc) pointer at the specified value
m.addPointer(value, 0x0000cc)

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