ChartDirector 7.0 (Java Edition)

Multi-Layer Gantt Chart




This example demonstrates a gantt chart containing two layers for the planned and actual dates.

The two layers are created using XYChart.addBoxWhiskerLayer. The bar width of the top layer is set using BaseBoxLayer.setDataWidth to a narrow width so that it will not block the bottom layer.

In this example, the color of the top layer is a pattern color created using an 4 x 4 in-memory pattern with BaseChart.patternColor.

Source Code Listing

[JSP Version] jspdemo/layergantt.jsp
<%@page import="ChartDirector.*, java.util.*" %> <% // the names of the tasks String[] labels = {"Market Research", "Define Specifications", "Overall Archiecture", "Project Planning", "Detail Design", "Software Development", "Test Plan", "Testing and QA", "User Documentation"}; // the planned start dates and end dates for the tasks Date[] startDate = {new GregorianCalendar(2004, 7, 16).getTime(), new GregorianCalendar(2004, 7, 30 ).getTime(), new GregorianCalendar(2004, 8, 13).getTime(), new GregorianCalendar(2004, 8, 20 ).getTime(), new GregorianCalendar(2004, 8, 27).getTime(), new GregorianCalendar(2004, 9, 4 ).getTime(), new GregorianCalendar(2004, 9, 25).getTime(), new GregorianCalendar(2004, 10, 1 ).getTime(), new GregorianCalendar(2004, 10, 8).getTime()}; Date[] endDate = {new GregorianCalendar(2004, 7, 30).getTime(), new GregorianCalendar(2004, 8, 13 ).getTime(), new GregorianCalendar(2004, 8, 27).getTime(), new GregorianCalendar(2004, 9, 4 ).getTime(), new GregorianCalendar(2004, 9, 11).getTime(), new GregorianCalendar(2004, 10, 8 ).getTime(), new GregorianCalendar(2004, 10, 8).getTime(), new GregorianCalendar(2004, 10, 22 ).getTime(), new GregorianCalendar(2004, 10, 22).getTime()}; // the actual start dates and end dates for the tasks up to now Date[] actualStartDate = {new GregorianCalendar(2004, 7, 16).getTime(), new GregorianCalendar(2004, 7, 27).getTime(), new GregorianCalendar(2004, 8, 9).getTime(), new GregorianCalendar(2004, 8, 18 ).getTime(), new GregorianCalendar(2004, 8, 22).getTime()}; Date[] actualEndDate = {new GregorianCalendar(2004, 7, 27).getTime(), new GregorianCalendar(2004, 8, 9).getTime(), new GregorianCalendar(2004, 8, 27).getTime(), new GregorianCalendar(2004, 9, 2 ).getTime(), new GregorianCalendar(2004, 9, 8).getTime()}; // Create a XYChart object of size 620 x 280 pixels. Set background color to light green (ccffcc) // with 1 pixel 3D border effect. XYChart c = new XYChart(620, 280, 0xccffcc, 0x000000, 1); // Add a title to the chart using 15 points Times Bold Itatic font, with white (ffffff) text on a // dark green (0x6000) background c.addTitle("Multi-Layer Gantt Chart Demo", "Times New Roman Bold Italic", 15, 0xffffff ).setBackground(0x006000); // Set the plotarea at (140, 55) and of size 460 x 200 pixels. Use alternative white/grey // background. Enable both horizontal and vertical grids by setting their colors to grey (c0c0c0). // Set vertical major grid (represents month boundaries) 2 pixels in width c.setPlotArea(140, 55, 460, 200, 0xffffff, 0xeeeeee, Chart.LineColor, 0xc0c0c0, 0xc0c0c0 ).setGridWidth(2, 1, 1, 1); // swap the x and y axes to create a horziontal box-whisker chart c.swapXY(); // Set the y-axis scale to be date scale from Aug 16, 2004 to Nov 22, 2004, with ticks every 7 days // (1 week) c.yAxis().setDateScale(new GregorianCalendar(2004, 7, 16).getTime(), new GregorianCalendar(2004, 10, 22).getTime(), 86400 * 7); // Add a red (ff0000) dash line to represent the current day c.yAxis().addMark(Chart.CTime(new GregorianCalendar(2004, 9, 8).getTime()), c.dashLineColor( 0xff0000, Chart.DashLine)); // Set multi-style axis label formatting. Month labels are in Arial Bold font in "mmm d" format. // Weekly labels just show the day of month and use minor tick (by using '-' as first character of // format string). c.yAxis().setMultiFormat(Chart.StartOfMonthFilter(), "<*font=Arial Bold*>{value|mmm d}", Chart.StartOfDayFilter(), "-{value|d}"); // Set the y-axis to shown on the top (right + swapXY = top) c.setYAxisOnRight(); // Set the labels on the x axis c.xAxis().setLabels(labels); // Reverse the x-axis scale so that it points downwards. c.xAxis().setReverse(); // Set the horizontal ticks and grid lines to be between the bars c.xAxis().setTickOffset(0.5); // Use blue (0000aa) as the color for the planned schedule int plannedColor = 0x0000aa; // Use a red hash pattern as the color for the actual dates. The pattern is created as a 4 x 4 // bitmap defined in memory as an array of colors. int[] hashPattern = {0xffffff, 0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xffffff}; int actualColor = c.patternColor(hashPattern, 4); // Add a box whisker layer to represent the actual dates. We add the actual dates layer first, so it // will be the top layer. BoxWhiskerLayer actualLayer = c.addBoxLayer(Chart.CTime(actualStartDate), Chart.CTime(actualEndDate), actualColor, "Actual"); // Set the bar height to 8 pixels so they will not block the bottom bar actualLayer.setDataWidth(8); // Add a box-whisker layer to represent the planned schedule date c.addBoxLayer(Chart.CTime(startDate), Chart.CTime(endDate), plannedColor, "Planned").setBorderColor( Chart.SameAsMainColor); // Add a legend box on the top right corner (595, 60) of the plot area with 8 pt Arial Bold font. // Use a semi-transparent grey (80808080) background. LegendBox b = c.addLegend(595, 60, false, "Arial Bold", 8); b.setAlignment(Chart.TopRight); b.setBackground(0x80808080, -1, 2); // Output the chart WebChartViewer viewer = new WebChartViewer(request, "chart1"); viewer.setChart(c, Chart.SVG); // Include tool tip for the chart viewer.setImageMap(c.getHTMLImageMap("", "", "title='{xLabel} ({dataSetName}): {top|mmm dd, yyyy} to {bottom|mmm dd, yyyy}'")); %> <!DOCTYPE html> <html> <head> <title>Multi-Layer Gantt Chart</title> <!-- Include ChartDirector Javascript Library to support chart interactions --> <script type="text/javascript" src="cdjcv.js"></script> </head> <body style="margin:5px 0px 0px 5px"> <div style="font:bold 18pt verdana;"> Multi-Layer Gantt Chart </div> <hr style="border:solid 1px #000080; background:#000080" /> <div style="font:10pt verdana; margin-bottom:1.5em"> <a href="viewsource.jsp?file=<%=request.getServletPath()%>">View Source Code</a> </div> <!-- ****** Here is the chart image ****** --> <%= viewer.renderHTML(response) %> </body> </html>