ChartDirector 7.0 (Python Edition)

White Horizontal Bar Meters


          

This example demonstrates horizontal bar meters in a white coloring scheme, and with bars in various shading styles.

Source Code Listing

pythondemo\whitehbarmeter.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 = 75.35 # Create a LinearMeter object of size 260 x 80 pixels with very light grey (0xeeeeee) backgruond # and a light grey (0xccccccc) 3-pixel thick rounded frame m = LinearMeter(260, 80, 0xeeeeee, 0xaaaaaa) m.setRoundedFrame(Transparent) m.setThickFrame(3) # Set the scale region top-left corner at (18, 24), with size of 222 x 20 pixels. The scale # labels are located on the top (implies horizontal meter) m.setMeter(18, 24, 222, 20, Top) # Set meter scale from 0 - 100, with a tick every 10 units m.setScale(0, 100, 10) # 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, Top), 4) # Add a 5-pixel thick smooth color scale at y = 48 (below the meter scale) m.addColorScale(smoothColorScale, 48, 5) elif chartIndex == 1 : # Add a green (0x00cc00) bar from 0 to value with bar lighting effect m.addBar(0, value, 0x00cc00, barLighting()) # Add a 5-pixel thick step color scale at y = 48 (below the meter scale) m.addColorScale(stepColorScale, 48, 5) elif chartIndex == 2 : # Add a purple (0x8833dd) bar from 0 to value with glass effect and 4 pixel rounded corners m.addBar(0, value, 0x8833dd, glassEffect(NormalGlare, Top), 4) # Add a 5-pixel thick high/low color scale at y = 48 (below the meter scale) m.addColorScale(highLowColorScale, 48, 5) elif chartIndex == 3 : # Add an orange (0xff8800) bar from 0 to value with cylinder lighting effect m.addBar(0, value, 0xff8800, cylinderEffect()) # Add a high only color scale at y = 48 (below the meter scale) with thickness varying from # 0 to 8 m.addColorScale(highColorScale, 48, 0, 48, 8) elif chartIndex == 4 : # Add a red (0xee3333) bar from 0 to value with glass effect and 4 pixel rounded corners m.addBar(0, value, 0xee3333, glassEffect(NormalGlare, Top), 4) # Add a 5-pixel thick smooth color scale at y = 48 (below the meter scale) m.addColorScale(smoothColorScale, 48, 5) else : # Add a grey (0xaaaaaa) bar from 0 to value m.addBar(0, value, 0xaaaaaa) # Add a 5-pixel thick step color scale at y = 48 (below the meter scale) m.addColorScale(stepColorScale, 48, 5) # Add a label right aligned to (243, 65) using 8pt Arial Bold font m.addText(243, 65, "Temperature C", "Arial Bold", 8, TextColor, Right) # Add a text box left aligned to (18, 65). Display the value using white (0xffffff) 8pt Arial # Bold font on a black (0x000000) background with depressed rounded border. t = m.addText(18, 65, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Left) t.setBackground(0x000000, 0x000000, -1) t.setRoundedCorners(3) # Output the chart m.makeChart("whitehbarmeter%s.png" % chartIndex) createChart(0) createChart(1) createChart(2) createChart(3) createChart(4) createChart(5)