This example demonstrates vertical bar meters in a black coloring scheme, and with bars in various shading styles.
This example demonstrates vertical bar meters in a black coloring scheme, and with bars in various shading styles.
ChartDirector 7.0 (Python Edition)
Black Vertical Bar Meters
Source Code Listing
#!/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 = 66.77
# Create a LinearMeter object of size 70 x 260 pixels with black background and rounded corners
m = LinearMeter(70, 260, 0x000000)
m.setRoundedFrame(Transparent)
# Set the default text and line colors to white (0xffffff)
m.setColor(TextColor, 0xffffff)
m.setColor(LineColor, 0xffffff)
# Set the scale region top-left corner at (36, 30), with size of 20 x 196 pixels. The scale
# labels are located on the left (default - implies vertical meter).
m.setMeter(36, 30, 20, 196)
# Set meter scale from 0 - 100, with a tick every 10 units
m.setScale(0, 100, 10)
# Add the chart title at the top center
title = m.addText(m.getWidth() / 2, 5, "Temp C", "Arial Bold", 8, TextColor, TopCenter)
# Move the scale labels 8 pixels from the meter scale to make room for the color scale
m.setLabelPos(0, 8)
# Demostrate different types of color scales
smoothColorScale = [0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000]
stepColorScale = [0, 0x00dd00, 50, 0xffff00, 80, 0xff0000, 100]
highLowColorScale = [0, 0x0000ff, 40, Transparent, 60, Transparent, 100, 0xff0000]
highColorScale = [70, Transparent, 100, 0xff0000]
if chartIndex == 0 :
# Add a blue (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
m.addBar(0, value, 0x0088ff, glassEffect(NormalGlare, Left), 4)
# Add a 4-pixel thick smooth color scale at x = 29 (left of meter scale)
m.addColorScale(smoothColorScale, 29, 4)
elif chartIndex == 1 :
# Add a yellow (0xCC9922) bar from 0 to value with bar lighting effect
m.addBar(0, value, 0xcc9922, barLighting())
# Add a 4-pixel thick smooth color scale at x = 29 (left of meter scale)
m.addColorScale(smoothColorScale, 29, 4)
# Set the title style to black text on a yellow (0xcc9922) background with rounded corners
title.setFontColor(0x000000)
title.setBackground(0xcc9922)
title.setRoundedCorners(2)
elif chartIndex == 2 :
# Add a grey (0xaaaaaa) bar from 0 to value with bar lighting effect
m.addBar(0, value, 0xaaaaaa, barLighting())
# Add a 4-pixel high/low color scale at x = 29 (left of meter scale)
m.addColorScale(highLowColorScale, 29, 4)
elif chartIndex == 3 :
# Add a brown (0xbb6622) bar from 0 to value with cylinder lighting effect
m.addBar(0, value, 0xbb6622, cylinderEffect())
# Add a 4 pixel thick brown (0xbb6622) frame
m.setThickFrame(4, 0xbb6622)
# Add a high only color scale at x = 29 (left of meter scale)
m.addColorScale(highColorScale, 29, 4)
elif chartIndex == 4 :
# Add a purple (0x7755ee) bar from 0 to value
m.addBar(0, value, 0x7755ee)
# Add a 4 pixel thick purple (0x880088) frame
m.setThickFrame(4, 0x880088)
# Add a 4-pixel high/low color scale at x = 29 (left of meter scale)
m.addColorScale(highLowColorScale, 29, 4)
else :
# Add a green (0x00bb00) bar from 0 to value with soft lighting effect and 4 pixel rounded
# corners
m.addBar(0, value, 0x00bb00, softLighting(), 4)
# Add a 4-pixel step color scale at x = 29 (left of meter scale)
m.addColorScale(stepColorScale, 29, 4)
# Add a text box at the bottom-center. Display the value using white (0xffffff) 8pt Arial Bold
# font on a black (0x000000) background with depressed grey (0x333333) rounded border.
t = m.addText(m.getWidth() / 2, m.getHeight() - 7, m.formatValue(value, "2"), "Arial Bold", 8,
0xffffff, BottomCenter)
t.setBackground(0x000000, 0x333333, -1)
t.setRoundedCorners(3)
# Output the chart
m.makeChart("blackvbarmeter%s.png" % chartIndex)
createChart(0)
createChart(1)
createChart(2)
createChart(3)
createChart(4)
createChart(5)