Enhanced Area Chart

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

The brushed silver background is achieved by using pychartdir.brushedSilverColor to create the brushed silver color, then use it in XYChart.XYChart as the chart background color.
The rounded frame is configured using BaseChart.setRoundedFrame.
The soft drop shadow is configured using BaseChart.setDropShadow.
Add a title to the chart using BaseChart.addTitle. The title text is represented using CDML to include star icons in the text.
Add a transparent box using BaseChart.addText and Box.setSize, with a depressed 3D border configured with Box.setBackground and rounded corners configured with Box.setRoundedCorners. The box is for decorative purpose and acts as the border for the chart contents excluding the title.
Set the background, border and grid colors of the plot area using XYChart.setPlotArea.
Add titles to the axes using Axis.setTitle.
Set the axis widths using Axis.setWidth.
Use a semi-transparent gradient color as the area color. The gradient color is created using BaseChart.linearGradientColor.
Add a logo at the bottom right corner of the plot area as custom text using BaseChart.addText with BottomRight alignment. The logo includes images and text encoded using CDML.

pythondemo\enhancedarea.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 *

# 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*><*/*>", "Times New Roman Bold Italic", 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=Times New Roman Bold " \
    "Italic,size=10,color=804040*>Molecular\nEngineering<*/*>").setAlignment(BottomRight)

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