ChartDirector 6.0 (Python Edition)

Enhanced Area Chart




This example extends the Simple Area Chart example by decorating the chart using a number of chart formatting features.

Source Code Listing

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

# The data for the area chart
data = [30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 89, 60, 55, 53, 35, 50, 66, 56, 48, 52,
    65, 62]

# The labels for the area chart
labels = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15",
    "16", "17", "18", "19", "20", "21", "22", "23", "24"]

# Create a XYChart object of size 600 x 360 pixels, with a brushed silver background, 1 pixel 3D
# border effect, rounded corners and soft drop shadow.
c = XYChart(600, 360, brushedSilverColor(), Transparent, 1)
c.setRoundedFrame()
c.setDropShadow()

# Add a title box to the chart using 18pt Times Bold Italic font.
title = c.addTitle(
    "<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> Performance Enhancer " \
    "<*img=star.png*><*img=star.png*><*/*>", "timesbi.ttf", 18)

#
# Use a text box with a depressed 3D border to create the inner depressed region
#

# The width of the frame border
frameWidth = 5

# Set the depressed region position
contentBox = c.addText(frameWidth, title.getHeight(), "")
contentBox.setSize(c.getDrawArea().getWidth() - 1 - frameWidth * 2, c.getDrawArea().getHeight(
    ) - title.getHeight() - frameWidth - 1)

# Use -1 as the rasied effect to create a depressed region
contentBox.setBackground(Transparent, Transparent, -1)

# Set rounded corners, and put the text box at the back of the chart
contentBox.setRoundedCorners(10)
contentBox.setZOrder(ChartBackZ)

# Tentatively set the plotarea to 50 pixels from the left depressed edge, and 25 pixels under the
# top depressed edge. Set the width to 75 pixels less than the depressed region width, and the
# height to 75 pixels less than the depressed region height. Use white (ffffff) background,
# transparent border, and grey (cccccc) horizontal and vertical grid lines.
plotArea = c.setPlotArea(50 + contentBox.getLeftX(), contentBox.getTopY() + 25, contentBox.getWidth(
    ) - 75, contentBox.getHeight() - 75, 0xffffff, -1, -1, 0xcccccc, -1)

# Add a title to the y axis
c.yAxis().setTitle("Energy Concentration (KJ per liter)")

# Set the labels on the x axis.
c.xAxis().setLabels(labels)

# Display 1 out of 3 labels on the x-axis.
c.xAxis().setLabelStep(3)

# Add a title to the x axis using CDML
c.xAxis().setTitle("<*block,valign=absmiddle*><*img=clock.png*>  Elapsed Time (hour)<*/*>")

# Set the axes width to 2 pixels
c.xAxis().setWidth(2)
c.yAxis().setWidth(2)

# Add an area layer to the chart using a gradient color that changes vertically from
# semi-transparent red (60ff0000) to semi-transparent white (60ffffff)
c.addAreaLayer(data, c.linearGradientColor(0, contentBox.getTopY() + 20, 0, contentBox.getTopY(
    ) + contentBox.getHeight() - 50, 0x60ff0000, 0x60ffffff))

# Adjust the plot area size, such that the bounding box (inclusive of axes) is 15 pixels from the
# left depressed edge, 25 pixels below the top depressed edge, 25 pixels from the right depressed
# edge, and 15 pixels above the bottom depressed edge.
c.packPlotArea(contentBox.getLeftX() + 15, contentBox.getTopY() + 25, contentBox.getLeftX(
    ) + contentBox.getWidth() - 25, contentBox.getTopY() + contentBox.getHeight() - 15)

# Add a custom CDML text with the bottom right corner is anchored to the bootom right corner of the
# plot area, with 5 pixels margin.
c.addText(plotArea.getLeftX() + plotArea.getWidth() - 5, plotArea.getTopY() + plotArea.getHeight(
    ) - 5,
    "<*block,valign=absmiddle*><*img=small_molecule.png*> <*block*>" \
    "<*font=timesbi.ttf,size=10,color=804040*>Molecular\nEngineering<*/*>").setAlignment(BottomRight
    )

# Output the chart
c.makeChart("enhancedarea.jpg")

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

# The data for the area chart
data = [30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 89, 60, 55, 53, 35, 50, 66, 56, 48, 52,
    65, 62]

# The labels for the area chart
labels = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15",
    "16", "17", "18", "19", "20", "21", "22", "23", "24"]

# Create a XYChart object of size 600 x 360 pixels, with a brushed silver background, 1 pixel 3D
# border effect, rounded corners and soft drop shadow.
c = XYChart(600, 360, brushedSilverColor(), Transparent, 1)
c.setRoundedFrame()
c.setDropShadow()

# Set directory for loading images to current script directory
# Need when running under Microsoft IIS
c.setSearchPath(os.path.dirname(sys.argv[0]))

# Add a title box to the chart using 18pt Times Bold Italic font.
title = c.addTitle(
    "<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> Performance Enhancer " \
    "<*img=star.png*><*img=star.png*><*/*>", "timesbi.ttf", 18)

#
# Use a text box with a depressed 3D border to create the inner depressed region
#

# The width of the frame border
frameWidth = 5

# Set the depressed region position
contentBox = c.addText(frameWidth, title.getHeight(), "")
contentBox.setSize(c.getDrawArea().getWidth() - 1 - frameWidth * 2, c.getDrawArea().getHeight(
    ) - title.getHeight() - frameWidth - 1)

# Use -1 as the rasied effect to create a depressed region
contentBox.setBackground(Transparent, Transparent, -1)

# Set rounded corners, and put the text box at the back of the chart
contentBox.setRoundedCorners(10)
contentBox.setZOrder(ChartBackZ)

# Tentatively set the plotarea to 50 pixels from the left depressed edge, and 25 pixels under the
# top depressed edge. Set the width to 75 pixels less than the depressed region width, and the
# height to 75 pixels less than the depressed region height. Use white (ffffff) background,
# transparent border, and grey (cccccc) horizontal and vertical grid lines.
plotArea = c.setPlotArea(50 + contentBox.getLeftX(), contentBox.getTopY() + 25, contentBox.getWidth(
    ) - 75, contentBox.getHeight() - 75, 0xffffff, -1, -1, 0xcccccc, -1)

# Add a title to the y axis
c.yAxis().setTitle("Energy Concentration (KJ per liter)")

# Set the labels on the x axis.
c.xAxis().setLabels(labels)

# Display 1 out of 3 labels on the x-axis.
c.xAxis().setLabelStep(3)

# Add a title to the x axis using CDML
c.xAxis().setTitle("<*block,valign=absmiddle*><*img=clock.png*>  Elapsed Time (hour)<*/*>")

# Set the axes width to 2 pixels
c.xAxis().setWidth(2)
c.yAxis().setWidth(2)

# Add an area layer to the chart using a gradient color that changes vertically from
# semi-transparent red (60ff0000) to semi-transparent white (60ffffff)
c.addAreaLayer(data, c.linearGradientColor(0, contentBox.getTopY() + 20, 0, contentBox.getTopY(
    ) + contentBox.getHeight() - 50, 0x60ff0000, 0x60ffffff))

# Adjust the plot area size, such that the bounding box (inclusive of axes) is 15 pixels from the
# left depressed edge, 25 pixels below the top depressed edge, 25 pixels from the right depressed
# edge, and 15 pixels above the bottom depressed edge.
c.packPlotArea(contentBox.getLeftX() + 15, contentBox.getTopY() + 25, contentBox.getLeftX(
    ) + contentBox.getWidth() - 25, contentBox.getTopY() + contentBox.getHeight() - 15)

# Add a custom CDML text with the bottom right corner is anchored to the bootom right corner of the
# plot area, with 5 pixels margin.
c.addText(plotArea.getLeftX() + plotArea.getWidth() - 5, plotArea.getTopY() + plotArea.getHeight(
    ) - 5,
    "<*block,valign=absmiddle*><*img=small_molecule.png*> <*block*>" \
    "<*font=timesbi.ttf,size=10,color=804040*>Molecular\nEngineering<*/*>").setAlignment(BottomRight
    )

# Output the chart
print("Content-type: image/jpeg\n")
binaryPrint(c.makeChart2(JPG))