ChartDirector Ver 3.0 (Python Edition)

Horizontal Bar Chart




This example illustrates a horizontal bar chart with invisible axes and plot area, using a gradient color for the bars.

The key features demonstrated in this example are:

Source Code Listing

[File: pythondemo/hbar.py] (The CGI version is available as "pythondemo_cgi/hbar.py".)
#!/usr/bin/python from pychartdir import * #The data for the bar chart data = [3.9, 8.1, 10.9, 14.2, 18.1, 19.0, 21.2, 23.2, 25.7, 36] #The labels for the bar chart labels = ["Bastic Group", "Simpa", "YG Super", "CID", "Giga Tech", "Indo Digital", "Supreme", "Electech", "THP Thunder", "Flash Light"] #Create a XYChart object of size 600 x 250 pixels c = XYChart(600, 250) #Add a title to the chart using Arial Bold Italic font c.addTitle("Revenue Estimation - Year 2002", "arialbi.ttf") #Set the plotarea at (100, 30) and of size 400 x 200 pixels. Set the plotarea #border, background and grid lines to Transparent c.setPlotArea(100, 30, 400, 200, Transparent, Transparent, Transparent, Transparent, Transparent) #Add a bar chart layer using the given data. Use a gradient color for the bars, #where the gradient is from dark green (0x008000) to white (0xffffff) layer = c.addBarLayer(data, c.gradientColor(100, 0, 500, 0, 0x8000, 0xffffff)) #Swap the axis so that the bars are drawn horizontally c.swapXY(1) #Set the bar gap to 10% layer.setBarGap(0.1) #Use the format "US$ xxx millions" as the bar label layer.setAggregateLabelFormat("US$ {value} millions") #Set the bar label font to 10 pts Times Bold Italic/dark red (0x663300) layer.setAggregateLabelStyle("timesbi.ttf", 10, 0x663300) #Set the labels on the x axis textbox = c.xAxis().setLabels(labels) #Set the x axis label font to 10pt Arial Bold Italic textbox.setFontStyle("arialbi.ttf") textbox.setFontSize(10) #Set the x axis to Transparent, with labels in dark red (0x663300) c.xAxis().setColors(Transparent, 0x663300) #Set the y axis and labels to Transparent c.yAxis().setColors(Transparent, Transparent) #output the chart c.makeChart("hbar.png")