ChartDirector 6.2 (.NET Edition)

Square Angular Meters

This example demonstrates angular meters of which the pointers are pivoted at the corners of squares.

The meters in this example are achieved by using various start angles and end angles with 90 degrees angular span between them.

Source Code Listing

[Windows Forms - C# version] NetWinCharts\CSharpWinCharts\squareameter.cs
 ```using System; using ChartDirector; namespace CSharpChartExplorer { public class squareameter : DemoModule { //Name of demo module public string getName() { return "Square Angular Meters"; } //Number of charts produced in this demo module public int getNoOfCharts() { return 4; } //Main code for creating charts public void createChart(WinChartViewer viewer, int chartIndex) { // The value to display on the meter double value = 4.75; // Create an AugularMeter object of size 110 x 110 pixels, using silver background color // with a black 2 pixel 3D depressed border. AngularMeter m = new AngularMeter(110, 110, Chart.silverColor(), 0x000000, -2); // Set meter appearance according to a parameter if (chartIndex == 0) { // Set the meter center at bottom left corner (15, 95), with radius 85 pixels. Meter // spans from 90 - 0 degrees. m.setMeter(15, 95, 85, 90, 0); // Add a label to the meter centered at (35, 75) m.addText(35, 75, "VDC", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at top right corner (103, 7) m.addText(103, 7, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.TopRight ).setBackground(0, 0, -1); } else if (chartIndex == 1) { // Set the meter center at top left corner (15, 15), with radius 85 pixels. Meter // spans from 90 - 180 degrees. m.setMeter(15, 15, 85, 90, 180); // Add a label to the meter centered at (35, 35) m.addText(35, 35, "AMP", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at bottom right corner (103, 103) m.addText(103, 103, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.BottomRight).setBackground(0, 0, -1); } else if (chartIndex == 2) { // Set the meter center at top right corner (15, 95), with radius 85 pixels. Meter // spans from 270 - 180 degrees. m.setMeter(95, 15, 85, 270, 180); // Add a label to the meter centered at (75, 35) m.addText(75, 35, "KW", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at bottom left corner (7, 103) m.addText(7, 103, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.BottomLeft ).setBackground(0, 0, -1); } else { // Set the meter center at bottom right corner (95, 95), with radius 85 pixels. // Meter spans from 270 - 360 degrees. m.setMeter(95, 95, 85, 270, 360); // Add a label to the meter centered at (75, 75) m.addText(75, 75, "RPM", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at top left corner (7, 7) m.addText(7, 7, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.TopLeft ).setBackground(0, 0, -1); } // Meter scale is 0 - 10, with a major tick every 2 units, and minor tick every 1 unit m.setScale(0, 10, 2, 1); // Set 0 - 6 as green (99ff99) zone, 6 - 8 as yellow (ffff00) zone, and 8 - 10 as red // (ff3333) zone m.addZone(0, 6, 0x99ff99, 0x808080); m.addZone(6, 8, 0xffff00, 0x808080); m.addZone(8, 10, 0xff3333, 0x808080); // Add a semi-transparent black (80000000) pointer at the specified value m.addPointer(value, unchecked((int)0x80000000)); // Output the chart viewer.Chart = m; } } }```

[Windows Forms - VB Version] NetWinCharts\VBNetWinCharts\squareameter.vb
 ```Imports System Imports Microsoft.VisualBasic Imports ChartDirector Public Class squareameter Implements DemoModule 'Name of demo module Public Function getName() As String Implements DemoModule.getName Return "Square Angular Meters" End Function 'Number of charts produced in this demo module Public Function getNoOfCharts() As Integer Implements DemoModule.getNoOfCharts Return 4 End Function 'Main code for creating charts Public Sub createChart(viewer As WinChartViewer, chartIndex As Integer) _ Implements DemoModule.createChart ' The value to display on the meter Dim value As Double = 4.75 ' Create an AugularMeter object of size 110 x 110 pixels, using silver background color with ' a black 2 pixel 3D depressed border. Dim m As AngularMeter = New AngularMeter(110, 110, Chart.silverColor(), &H000000, -2) ' Set meter appearance according to a parameter If chartIndex = 0 Then ' Set the meter center at bottom left corner (15, 95), with radius 85 pixels. Meter ' spans from 90 - 0 degrees. m.setMeter(15, 95, 85, 90, 0) ' Add a label to the meter centered at (35, 75) m.addText(35, 75, "VDC", "Arial Bold", 12, Chart.TextColor, Chart.Center) ' Add a text box to show the value at top right corner (103, 7) m.addText(103, 7, m.formatValue(value, "2"), "Arial", 8, &Hffffff, Chart.TopRight _ ).setBackground(0, 0, -1) ElseIf chartIndex = 1 Then ' Set the meter center at top left corner (15, 15), with radius 85 pixels. Meter spans ' from 90 - 180 degrees. m.setMeter(15, 15, 85, 90, 180) ' Add a label to the meter centered at (35, 35) m.addText(35, 35, "AMP", "Arial Bold", 12, Chart.TextColor, Chart.Center) ' Add a text box to show the value at bottom right corner (103, 103) m.addText(103, 103, m.formatValue(value, "2"), "Arial", 8, &Hffffff, Chart.BottomRight _ ).setBackground(0, 0, -1) ElseIf chartIndex = 2 Then ' Set the meter center at top right corner (15, 95), with radius 85 pixels. Meter spans ' from 270 - 180 degrees. m.setMeter(95, 15, 85, 270, 180) ' Add a label to the meter centered at (75, 35) m.addText(75, 35, "KW", "Arial Bold", 12, Chart.TextColor, Chart.Center) ' Add a text box to show the value at bottom left corner (7, 103) m.addText(7, 103, m.formatValue(value, "2"), "Arial", 8, &Hffffff, Chart.BottomLeft _ ).setBackground(0, 0, -1) Else ' Set the meter center at bottom right corner (95, 95), with radius 85 pixels. Meter ' spans from 270 - 360 degrees. m.setMeter(95, 95, 85, 270, 360) ' Add a label to the meter centered at (75, 75) m.addText(75, 75, "RPM", "Arial Bold", 12, Chart.TextColor, Chart.Center) ' Add a text box to show the value at top left corner (7, 7) m.addText(7, 7, m.formatValue(value, "2"), "Arial", 8, &Hffffff, Chart.TopLeft _ ).setBackground(0, 0, -1) End If ' Meter scale is 0 - 10, with a major tick every 2 units, and minor tick every 1 unit m.setScale(0, 10, 2, 1) ' Set 0 - 6 as green (99ff99) zone, 6 - 8 as yellow (ffff00) zone, and 8 - 10 as red ' (ff3333) zone m.addZone(0, 6, &H99ff99, &H808080) m.addZone(6, 8, &Hffff00, &H808080) m.addZone(8, 10, &Hff3333, &H808080) ' Add a semi-transparent black (80000000) pointer at the specified value m.addPointer(value, &H80000000) ' Output the chart viewer.Chart = m End Sub End Class```

[WPF - C#] NetWPFCharts\squareameter.cs
 ```using System; using ChartDirector; namespace CSharpWPFDemo { public class squareameter : DemoModule { //Name of demo module public string getName() { return "Square Angular Meters"; } //Number of charts produced in this demo module public int getNoOfCharts() { return 4; } //Main code for creating charts public void createChart(WPFChartViewer viewer, int chartIndex) { // The value to display on the meter double value = 4.75; // Create an AugularMeter object of size 110 x 110 pixels, using silver background color // with a black 2 pixel 3D depressed border. AngularMeter m = new AngularMeter(110, 110, Chart.silverColor(), 0x000000, -2); // Set meter appearance according to a parameter if (chartIndex == 0) { // Set the meter center at bottom left corner (15, 95), with radius 85 pixels. Meter // spans from 90 - 0 degrees. m.setMeter(15, 95, 85, 90, 0); // Add a label to the meter centered at (35, 75) m.addText(35, 75, "VDC", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at top right corner (103, 7) m.addText(103, 7, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.TopRight ).setBackground(0, 0, -1); } else if (chartIndex == 1) { // Set the meter center at top left corner (15, 15), with radius 85 pixels. Meter // spans from 90 - 180 degrees. m.setMeter(15, 15, 85, 90, 180); // Add a label to the meter centered at (35, 35) m.addText(35, 35, "AMP", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at bottom right corner (103, 103) m.addText(103, 103, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.BottomRight).setBackground(0, 0, -1); } else if (chartIndex == 2) { // Set the meter center at top right corner (15, 95), with radius 85 pixels. Meter // spans from 270 - 180 degrees. m.setMeter(95, 15, 85, 270, 180); // Add a label to the meter centered at (75, 35) m.addText(75, 35, "KW", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at bottom left corner (7, 103) m.addText(7, 103, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.BottomLeft ).setBackground(0, 0, -1); } else { // Set the meter center at bottom right corner (95, 95), with radius 85 pixels. // Meter spans from 270 - 360 degrees. m.setMeter(95, 95, 85, 270, 360); // Add a label to the meter centered at (75, 75) m.addText(75, 75, "RPM", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at top left corner (7, 7) m.addText(7, 7, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.TopLeft ).setBackground(0, 0, -1); } // Meter scale is 0 - 10, with a major tick every 2 units, and minor tick every 1 unit m.setScale(0, 10, 2, 1); // Set 0 - 6 as green (99ff99) zone, 6 - 8 as yellow (ffff00) zone, and 8 - 10 as red // (ff3333) zone m.addZone(0, 6, 0x99ff99, 0x808080); m.addZone(6, 8, 0xffff00, 0x808080); m.addZone(8, 10, 0xff3333, 0x808080); // Add a semi-transparent black (80000000) pointer at the specified value m.addPointer(value, unchecked((int)0x80000000)); // Output the chart viewer.Chart = m; } } }```

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\squareameter.aspx
(Click here on how to convert this code to code-behind style.)
 ```<%@ Page Language="C#" Debug="true" %> <%@ Import Namespace="ChartDirector" %> <%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %> ```

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\squareameter.aspx
(Click here on how to convert this code to code-behind style.)
 ```<%@ Page Language="VB" Debug="true" %> <%@ Import Namespace="ChartDirector" %> <%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %> ```

[ASP.NET MVC - Controller] NetMvcCharts\Controllers\SquareameterController.cs
 ```using System; using System.Web.Mvc; using ChartDirector; namespace NetMvcCharts.Controllers { public class SquareameterController : Controller { // // Default Action // public ActionResult Index() { ViewBag.Title = "Square Angular Meters"; // This example contains 4 charts. ViewBag.Viewer = new RazorChartViewer[4]; for (int i = 0; i < ViewBag.Viewer.Length; ++i) createChart(ViewBag.Viewer[i] = new RazorChartViewer(HttpContext, "chart" + i), i); return View("~/Views/Shared/ChartView.cshtml"); } // // Create chart // private void createChart(RazorChartViewer viewer, int chartIndex) { // The value to display on the meter double value = 4.75; // Create an AugularMeter object of size 110 x 110 pixels, using silver background color with // a black 2 pixel 3D depressed border. AngularMeter m = new AngularMeter(110, 110, Chart.silverColor(), 0x000000, -2); // Set meter appearance according to a parameter if (chartIndex == 0) { // Set the meter center at bottom left corner (15, 95), with radius 85 pixels. Meter // spans from 90 - 0 degrees. m.setMeter(15, 95, 85, 90, 0); // Add a label to the meter centered at (35, 75) m.addText(35, 75, "VDC", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at top right corner (103, 7) m.addText(103, 7, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.TopRight ).setBackground(0, 0, -1); } else if (chartIndex == 1) { // Set the meter center at top left corner (15, 15), with radius 85 pixels. Meter spans // from 90 - 180 degrees. m.setMeter(15, 15, 85, 90, 180); // Add a label to the meter centered at (35, 35) m.addText(35, 35, "AMP", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at bottom right corner (103, 103) m.addText(103, 103, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.BottomRight ).setBackground(0, 0, -1); } else if (chartIndex == 2) { // Set the meter center at top right corner (15, 95), with radius 85 pixels. Meter spans // from 270 - 180 degrees. m.setMeter(95, 15, 85, 270, 180); // Add a label to the meter centered at (75, 35) m.addText(75, 35, "KW", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at bottom left corner (7, 103) m.addText(7, 103, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.BottomLeft ).setBackground(0, 0, -1); } else { // Set the meter center at bottom right corner (95, 95), with radius 85 pixels. Meter // spans from 270 - 360 degrees. m.setMeter(95, 95, 85, 270, 360); // Add a label to the meter centered at (75, 75) m.addText(75, 75, "RPM", "Arial Bold", 12, Chart.TextColor, Chart.Center); // Add a text box to show the value at top left corner (7, 7) m.addText(7, 7, m.formatValue(value, "2"), "Arial", 8, 0xffffff, Chart.TopLeft ).setBackground(0, 0, -1); } // Meter scale is 0 - 10, with a major tick every 2 units, and minor tick every 1 unit m.setScale(0, 10, 2, 1); // Set 0 - 6 as green (99ff99) zone, 6 - 8 as yellow (ffff00) zone, and 8 - 10 as red // (ff3333) zone m.addZone(0, 6, 0x99ff99, 0x808080); m.addZone(6, 8, 0xffff00, 0x808080); m.addZone(8, 10, 0xff3333, 0x808080); // Add a semi-transparent black (80000000) pointer at the specified value m.addPointer(value, unchecked((int)0x80000000)); // Output the chart viewer.Image = m.makeWebImage(Chart.PNG); } } }```

[ASP.NET MVC - View] NetMvcCharts\Views\Shared\ChartView.cshtml
 ```@{ Layout = null; } @ViewBag.Title
@ViewBag.Title

@{ if (ViewBag.Viewer is Array) { // Display multiple charts for (int i = 0; i < ViewBag.Viewer.Length; ++i) { @:@Html.Raw(ViewBag.Viewer[i].RenderHTML()) } } else { // Display one chart only @:@Html.Raw(ViewBag.Viewer.RenderHTML()) } }
```