ChartDirector 7.0 (Java Edition)

Black Vertical Linear Meters


          

This example demonstrates vertical bar meters in a black coloring scheme.

Source Code Listing

[JSP Version] jspdemo/blackvlinearmeter.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 = 74.25; // Create a LinearMeter object of size 70 x 260 pixels with black background and rounded corners LinearMeter m = new LinearMeter(70, 260, 0x000000); m.setRoundedFrame(Chart.Transparent); // Set the default text and line colors to white (0xffffff) m.setColor(Chart.TextColor, 0xffffff); m.setColor(Chart.LineColor, 0xffffff); // Set the scale region top-left corner at (28, 30), with size of 20 x 196 pixels. The scale // labels are located on the left (default - implies vertical meter) m.setMeter(28, 30, 20, 196); // Set meter scale from 0 - 100, with a tick every 10 units m.setScale(0, 100, 10); // The tick line width to 1 pixel m.setLineWidth(0, 1); // Demostrate different types of color scales and putting them at different positions double[] smoothColorScale = {0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000}; double[] stepColorScale = {0, 0x00cc00, 50, 0xeecc00, 80, 0xdd0000, 100}; double[] highLowColorScale = {0, 0x0000ff, 70, Chart.Transparent, 100, 0xff0000}; if (chartIndex == 0) { // Add the smooth color scale at the default position m.addColorScale(smoothColorScale); } else if (chartIndex == 1) { // Add the step color scale at the default position m.addColorScale(stepColorScale); } else if (chartIndex == 2) { // Add the high low scale at the default position m.addColorScale(highLowColorScale); } else if (chartIndex == 3) { // Add the smooth color scale starting at x = 28 (left of scale) with zero width and ending // at x = 28 with 20 pixels width m.addColorScale(smoothColorScale, 28, 0, 28, 20); } else if (chartIndex == 4) { // Add the smooth color scale starting at x = 38 (center of scale) with zero width and // ending at x = 28 with 20 pixels width m.addColorScale(smoothColorScale, 38, 0, 28, 20); } else { // Add the smooth color scale starting at x = 48 (right of scale) with zero width and ending // at x = 28 with 20 pixels width m.addColorScale(smoothColorScale, 48, 0, 28, 20); } // Add a blue (0x0000cc) pointer with white (0xffffff) border at the specified value m.addPointer(value, 0x0000cc, 0xffffff); // Add a label at the top-center using 8pt Arial Bold font m.addText(m.getWidth() / 2, 5, "Temp C", "Arial Bold", 8, Chart.TextColor, Chart.Top); // Add a text box at the bottom-center. Display the value using white (0xffffff) 8pt Arial Bold // font on a black (0x000000) background with depressed grey (0x444444) rounded border. TextBox t = m.addText(m.getWidth() / 2, m.getHeight() - 7, m.formatValue(value, "2"), "Arial Bold", 8, 0xffffff, Chart.Bottom); t.setBackground(0x000000, 0x444444, -1); t.setRoundedCorners(3); // 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>Black Vertical Linear 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;"> Black Vertical Linear 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>