Set resistor style based on user's browser's language preference

README.md

@@ -51,11 +51,12 @@ You can link to the full page version of the application using the link shown ab
 
 If you want to embed the application in another page then use an iframe with the src being the full-page version.
 
-You can add query parameters to link to the full page version to change it's startup behaviour. The following are supported:
+You can add query parameters to link to change the applications startup behaviour. The following are supported:
 ```
 .../circuitjs1.html?cct=<string> // Load the circuit from the URL (like the # in the Java version)
 .../circuitjs1.html?startCircuit=<filename> // Loads the circuit named "filename" from the "Circuits" directory
-.../circuitjs1.html?euroResistors=<true|false>
+.../circuitjs1.html?euroResistors=<true|false> // Set to true to force "Euro" style resistors. If not specified the resistor style will be based on the user's browser's language preferences
+.../circuitjs1.html?usResistors=<true|false> // Set to true to force "US" style resistors. If not specified the resistor style will be based on the user's browser's language preferences
 .../circuitjs1.html?whiteBackground=<true|false>
 .../circuitjs1.html?conventionalCurrent=<true|false>
 ```

src/com/lushprojects/circuitjs1/client/CirSim.java

@@ -81,6 +81,7 @@
 import com.google.gwt.user.client.ui.Frame;
 import com.google.gwt.user.client.ui.Widget;
 import com.google.gwt.user.client.Window.Navigator;
+import com.google.gwt.i18n.shared.DefaultDateTimeFormatInfo;
 
 
 public class CirSim implements MouseDownHandler, MouseMoveHandler, MouseUpHandler,
@@ -319,7 +320,8 @@ public void init() {
 //	String useFrameStr = null;
 	boolean printable = false;
 	boolean convention = true;
-	boolean euro = false;
+	boolean euroRes = false;
+	boolean usRes = false;
 	MenuBar m;
 
 	CircuitElm.initClass(this);
@@ -354,7 +356,8 @@ public void init() {
 //			pause = Integer.parseInt(param);
 		startCircuit = qp.getValue("startCircuit");
 		startLabel   = qp.getValue("startLabel");
-		euro = qp.getBooleanValue("euroResistors", false);
+		euroRes = qp.getBooleanValue("euroResistors", false);
+		usRes = qp.getBooleanValue("usResistors",  false);
 //		useFrameStr  = qp.getValue("useFrame");
 //		String x = applet.getParameter("whiteBackground");
 //		if (x != null && x.equalsIgnoreCase("true"))
@@ -366,12 +369,7 @@ public void init() {
 		convention = qp.getBooleanValue("conventionalCurrent", true);
 	} catch (Exception e) { }
 
-//	boolean euro = (euroResistor != null && euroResistor.equalsIgnoreCase("true"));
-//	useFrame = (useFrameStr == null || !useFrameStr.equalsIgnoreCase("false"));
-//	if (useFrame)
-//	    main = this;
-//	else
-//	    main = applet;
+
 
 	String os = Navigator.getPlatform();
 	isMac = (os.toLowerCase().contains("mac"));
@@ -514,7 +512,12 @@ public void init() {
 			}
 	}));
 	m.addItem(euroResistorCheckItem = new CheckboxMenuItem("European Resistors"));
-	euroResistorCheckItem.setState(euro);
+	if (euroRes) 
+		euroResistorCheckItem.setState(true);
+	else if (usRes)
+		euroResistorCheckItem.setState(false);
+	else
+		euroResistorCheckItem.setState(!weAreInUS());
 	m.addItem(printableCheckItem = new CheckboxMenuItem("White Background",
 			new Command() { public void execute(){
 				int i;
@@ -4633,6 +4636,32 @@ public void updateModels() {
 	for (i = 0; i != elmList.size(); i++)
 	    elmList.get(i).updateModels();
     }
+
+    native void jsConsoleLog(String message) /*-{
+    try {
+        console.log(message);
+    } catch (e) {
+    }
+    }-*/;
+
+
+    native boolean weAreInUS() /*-{
+    try {
+    	l=window.navigator.language ;
+    	if (l.length > 2) {
+    		l = l.slice(-2);
+    		return (l == "US" || l=="CA");
+    	} else {
+    		return 0;
+    	}
+
+    } catch (e) { return 0;
+    }
+    }-*/;
+
 }
 
 
+
+
+