ChartDirector 7.0 (Java Edition)

Color Vertical Bar Meters


          

This example demonstrates horizontal bar meters in various colors, with different color scales, and with title and value readout.

BaseMeter.addColorScale is used to create the color scales in the meters. The color scales are created with various colors, end point positions and widths at the end points.

The title and value readout are created as TextBox objects using BaseChart.addTitle and BaseChart.addTitle2, with the text box background set to the same color as that of the chart border.

Source Code Listing

[JSP Version] jspdemo/colorvbarmeter.jsp
<%@page import="ChartDirector.*, java.util.*" %> <%! // Function to create the demo charts void createChart(WebChartViewer viewer, int chartIndex) { // The value to display on the meter double value = 66.77; // The background, border and bar colors of the meters int[] bgColor = {0xcce4ff, 0xccffcc, 0xffdddd, 0xffffaa, 0xffccff, 0xeeeeee}; int[] borderColor = {0x000088, 0x006600, 0x880000, 0xee6600, 0x6600aa, 0x666666}; int[] barColor = {0x2299ff, 0x00ee00, 0xee4455, 0xff8800, 0x8833dd, 0x888888}; // Create a LinearMeter object of size 70 x 260 pixels with a 3-pixel thick rounded frame LinearMeter m = new LinearMeter(70, 260, bgColor[chartIndex], borderColor[chartIndex]); m.setRoundedFrame(Chart.Transparent); m.setThickFrame(3); // Set the scale region top-left corner at (28, 33), with size of 20 x 194 pixels. The scale // labels are located on the left (default - implies vertical meter). m.setMeter(28, 33, 20, 194); // Set meter scale from 0 - 100, with a tick every 10 units m.setScale(0, 100, 10); // Demostrate different types of color scales double[] smoothColorScale = {0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000}; double[] stepColorScale = {0, 0x33ff33, 50, 0xffff00, 80, 0xff3333, 100}; double[] highLowColorScale = {0, 0x0000ff, 40, Chart.Transparent, 60, Chart.Transparent, 100, 0xff0000}; double[] highColorScale = {70, Chart.Transparent, 100, 0xff0000}; double[] lowColorScale = {0, 0x0000ff, 30, Chart.Transparent}; if (chartIndex == 0) { // Add a 6-pixel thick smooth color scale at x = 53 (right of meter scale) m.addColorScale(smoothColorScale, 53, 6); } else if (chartIndex == 1) { // Add a high only color scale at x = 52 (right of meter scale) with thickness varying from // 0 to 8 m.addColorScale(highColorScale, 52, 0, 52, 8); // Add a low only color scale at x = 52 (right of meter scale) with thickness varying from 8 // to 0 m.addColorScale(lowColorScale, 52, 8, 52, 0); } else if (chartIndex == 2) { // Add a high only color scale at x = 52 (right of meter scale) with thickness varying from // 0 to 8 m.addColorScale(highColorScale, 52, 0, 52, 8); } else if (chartIndex == 3) { // Add a smooth color scale at x = 52 (right of meter scale) with thickness varying from 0 // to 8 m.addColorScale(smoothColorScale, 52, 0, 52, 8); } else if (chartIndex == 4) { // Add a 6-pixel thick high/low color scale at x = 53 (right of meter scale) m.addColorScale(highLowColorScale, 53, 6); } else { // Add a 6-pixel thick step color scale at x = 53 (right of meter scale) m.addColorScale(stepColorScale, 53, 6); } // Add a bar from 0 to value with glass effect and 4 pixel rounded corners m.addBar(0, value, barColor[chartIndex], Chart.glassEffect(Chart.NormalGlare, Chart.Left), 4); // Add a title using white (0xffffff) 8pt Arial Bold font with a border color background m.addTitle("Temp C", "Arial Bold", 8, 0xffffff).setBackground(borderColor[chartIndex]); // Add a bottom title using white (0xffffff) 8pt Arial Bold font with a border color background // to display the value m.addTitle2(Chart.Bottom, m.formatValue(value, "2"), "Arial Bold", 8, 0xffffff).setBackground( borderColor[chartIndex]); // Output the chart viewer.setChart(m, Chart.SVG); } %> <% // This example includes 6 charts WebChartViewer[] viewers = new WebChartViewer[6]; for (int i = 0; i < viewers.length; ++i) { viewers[i] = new WebChartViewer(request, "chart" + i); createChart(viewers[i], i); } %> <!DOCTYPE html> <html> <head> <title>Color Vertical Bar Meters</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;"> Color Vertical Bar Meters </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 are the chart images ****** --> <% for (int i = 0; i < viewers.length; ++i) { out.write(viewers[i].renderHTML(response)); out.write(" "); } %> </body> </html>