improved error messages

pom.xml

@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>de.srsoftware</groupId>
 	<artifactId>web4rail</artifactId>
-	<version>1.3.56</version>
+	<version>1.3.57</version>
 	<name>Web4Rail</name>
 	<packaging>jar</packaging>
 	<description>Java Model Railway Control</description>

resources/css/style.css

@@ -256,7 +256,14 @@ fieldset{
 	border-radius: 5px;
 }
 .error{
-	background: red;
+	background: orange;
+	margin: 30px 10px 5px;
+	padding: 0;
+	border-radius: 10px;
+}
+
+.error p{
+	padding: 5px;
 }
 
 h4,ul{

resources/js/plan.js

@@ -37,7 +37,7 @@ function arrangeTabs(){
 	var tabs = $('<div/>',{'class':'tabs'});
 	var winId = $('.window').attr('id')+"-";
 	
-	tabs.insertAfter($('.swapbtn'));
+	tabs.insertAfter($('.error'));
 	var target = null;
 	var index = null;
 	$('.window > fieldset > legend').each(function(){

resources/translations/Application.de.translation

@@ -1,4 +1,5 @@
 abort : abbrechen
+Aborting route allocation... : Routen-Reservierung wird abgebrochen...
 Accessory : Zubehör
 Action : Aktion
 Actions : Aktionen

src/main/java/de/srsoftware/web4rail/BaseClass.java

@@ -423,13 +423,21 @@ public abstract class BaseClass implements Constants{
 		return (T) this;
 	}
 	
-	public Window properties() {
-		return properties(new ArrayList<>(), new FormInput(), new ArrayList<>());
+	public Window properties(String...error) {
+		return properties(new ArrayList<>(), new FormInput(), new ArrayList<>(),error);
 	}
 
 	
-	protected Window properties(List<Fieldset> preForm,FormInput formInputs,List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm,FormInput formInputs,List<Fieldset> postForm, String...errorMessages) {
 		Window win = new Window(getClass().getSimpleName()+"-properties", t("Properties of {}",this.title()));
+
+		Tag errorDiv = new Tag("div").clazz("error").content("");
+		if (errorMessages != null && errorMessages.length > 0) {
+			for (String errorMessage : errorMessages) {
+				if (isSet(errorMessage)) new Tag("p").content(errorMessage).addTo(errorDiv);
+			}
+		}
+		errorDiv.addTo(win);
 		
 		preForm.forEach(fieldset -> fieldset.addTo(win));
 

src/main/java/de/srsoftware/web4rail/Route.java

@@ -88,7 +88,7 @@ public class Route extends BaseClass {
 	public  Direction					   endDirection;
 	private Vector<Tile>                   path;
 	private Vector<Signal>                 signals;
-	private Train                          train;
+	//private Train                          train;
 	private HashMap<String,ActionList>     triggeredActions = new HashMap<String, ActionList>();
 	private HashMap<Turnout,Turnout.State> turnouts;
 	private Block                          startBlock = null;
@@ -214,7 +214,7 @@ public class Route extends BaseClass {
 	private Fieldset basicProperties() {
 		Fieldset fieldset = new Fieldset(t("Route properties"));
 		
-		if (isSet(train)) train.link("span",t("Train")+": "+train).addTo(fieldset);
+//		if (isSet(train)) train.link("span",t("Train")+": "+train).addTo(fieldset);
 		Tag list = new Tag("ul");
 		startBlock.link("li",t("Origin: {} to {}",startBlock.name,startDirection)).addTo(list);
 		endBlock.link("li",t("Destination: {} from {}",endBlock.name,endDirection.inverse())).addTo(list);
@@ -319,15 +319,16 @@ public class Route extends BaseClass {
 	 * @param contact
 	 * @param trainHead
 	 */
-	public void contact(Contact contact) {
+	public void contact(Context context) {
+		Contact contact = context.contact();
 		if (triggeredContacts.contains(contact)) return; // don't trigger contact a second time
 		triggeredContacts.add(contact);
-		LOG.debug("{} on {} activated {}.",train,this,contact);
+		LOG.debug("{} on {} activated {}.",context.train(),this,contact);
 		ActionList actions = triggeredActions.get(contact.trigger());
 		LOG.debug("Contact has id {} / trigger {} and is assigned with {}",contact.id(),contact.trigger(),isNull(actions)?t("nothing"):actions);
 		if (isNull(actions)) return;
-		Context context = new Context(this).train(train).contact(contact);
-		actions.fire(context,"Route.Contact("+contact.addr()+")");
+		//Context context = new Context(this).train(train).contact(contact);
+		actions.fire(context.route(this),"Route.Contact("+contact.addr()+")");
 	}
 
 	public Vector<Contact> contacts() {
@@ -375,7 +376,7 @@ public class Route extends BaseClass {
 		return endBlock;
 	}	
 	
-	public void finish() {
+	public void finish(Train train) {
 		LOG.debug("{}.finish()",this);
 		train.endRoute();
 		free();				
@@ -386,6 +387,7 @@ public class Route extends BaseClass {
 	
 	private void free() {
 		for (Tile tile : path) {
+			Train train = tile.train();
 			if (isSet(train) && train.onTrace(tile)) {
 				tile.setState(Status.OCCUPIED, train);
 			} else tile.free();
@@ -687,7 +689,7 @@ public class Route extends BaseClass {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 
 		preForm.add(conditions.list(t("Route will only be available, if all conditions are fulfilled.")));
 		preForm.add(contactsAndActions());
@@ -703,7 +705,7 @@ public class Route extends BaseClass {
 		postForm.add(basicProperties());
 		if (!turnouts.isEmpty()) postForm.add(turnouts());
 		postForm.add(brakeTimes());
-		Window win = super.properties(preForm, formInputs, postForm);
+		Window win = super.properties(preForm, formInputs, postForm,errors);
 		previewScript().addTo(win);
 		return win;
 	}
@@ -715,7 +717,7 @@ public class Route extends BaseClass {
 	@Override
 	public BaseClass remove() {
 		LOG.debug("Removing route ({}) {}",id(),this);
-		if (isSet(train)) train.removeChild(this);
+//		if (isSet(train)) train.removeChild(this);
 		for (Tile tile : path) {
 			tile.removeChild(this);
 		}
@@ -734,7 +736,7 @@ public class Route extends BaseClass {
 		if (child == endBlock) endBlock = null;
 		path.remove(child);
 		signals.remove(child);
-		if (child == train) train = null;
+//		if (child == train) train = null;
 		for (ActionList list : triggeredActions.values()) {
 			list.removeChild(child);
 		}
@@ -746,8 +748,9 @@ public class Route extends BaseClass {
 	
 	public boolean reset() {
 		LOG.debug("{}.reset()",this);
+		setSignals(Signal.RED);
 		free();
-		train = null;		
+//		train = null;		
 		return true;
 	}
 	
@@ -794,15 +797,15 @@ public class Route extends BaseClass {
 //		if (state == State.STARTED) return true;
 		LOG.debug("{}.start()",this);
 		if (isNull(newTrain)) return false; // can't set route's train to null
-		if (isSet(train)) {
+/*		if (isSet(train)) {
 			if (newTrain != train) return false; // can't alter route's train
-		} else train = newTrain.setRoute(this); // set new train
+		} else train = */newTrain.setRoute(this); // set new train
 		
 		ActionList startActions = triggeredActions.get(ROUTE_START);
 		
 		if (isSet(startActions)) {
-			Context context = new Context(train).route(this);
-			if (!startActions.fire(context,this+".start("+train.name()+")")) return false; // start actions failed
+			Context context = new Context(newTrain).route(this);
+			if (!startActions.fire(context,this+".start("+newTrain.name()+")")) return false; // start actions failed
 		}
 //		state = State.STARTED;
 		triggeredContacts.clear();
@@ -822,12 +825,12 @@ public class Route extends BaseClass {
 
 	@Override
 	public String toString() {
-		return getClass().getSimpleName()+"("+(isSet(train)?train+":":"")+name()+")";
+		return getClass().getSimpleName()+"("+name()+")";
 	}
 		
-	public Train train() {
+/*	public Train train() {
 		return train;
-	}
+	}*/
 	
 	private Fieldset turnouts() {
 		Fieldset win = new Fieldset(t("Turnouts"));

src/main/java/de/srsoftware/web4rail/actions/Action.java

@@ -138,10 +138,10 @@ public abstract class Action extends BaseClass {
 	}
 
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Edit json"),button(t("export"), Map.of(ACTION, ACTION_SAVE)));
 
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	public static Tag selector() {

src/main/java/de/srsoftware/web4rail/actions/ActionList.java

@@ -252,11 +252,11 @@ public class ActionList extends Action implements Iterable<Action>{
 	}
 
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Fieldset fieldset = new Fieldset(t("Actions"));
 		list().addTo(fieldset);
 		postForm.add(fieldset);
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/AddRemoveDestination.java

@@ -86,14 +86,14 @@ public class AddRemoveDestination extends Action {
 	}
 
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Tag span = new Tag("span");
 		button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,Train.DESTINATION)).addTo(span);
 		button(t("Clear destinations"),Map.of(ACTION,ACTION_UPDATE,Train.DESTINATION,"0")).addTo(span);
 		formInputs.add(t("Destination")+": "+(isNull(destination) ? t("Clear destinations") : destination),span);
 		formInputs.add(t("Turn at destination"),new Checkbox(TURN, t("Turn"), turnAtDestination));
 		formInputs.add(t("Shunting"),new Checkbox(SHUNTING, t("Shunting"), shunting));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/AddRemoveTag.java

@@ -51,13 +51,13 @@ public class AddRemoveTag extends Action{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Tag"),new Input(TAG, tag));
 		Tag div = new Tag("div");
 		new Radio(TYPE, ACTION_ADD, t("add"), !remove).addTo(div);
 		new Radio(TYPE, ACTION_DROP, t("delete"), remove).addTo(div);
 		formInputs.add(t("Action"),div);
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/AlterDirection.java

@@ -77,14 +77,14 @@ public class AlterDirection extends Action{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Tag radios = new Tag("div");
 		for (NEWDIR d : NEWDIR.values()) {
 			new Radio(NEW_DIRECTION, d, t("{}",d), newDir == d).addTo(radios);	
 		}
 		
 		formInputs.add(t("new direction"),radios);
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@SuppressWarnings("incomplete-switch")

src/main/java/de/srsoftware/web4rail/actions/ConditionalAction.java

@@ -70,9 +70,9 @@ public class ConditionalAction extends ActionList {
 	}
 
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		preForm.add(conditions.list());
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 		
 	}
 

src/main/java/de/srsoftware/web4rail/actions/CoupleTrain.java

@@ -56,10 +56,10 @@ public class CoupleTrain extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Couple"),new Checkbox(LAST, t("last parked train"), last));
 		formInputs.add(t("Swap order"),new Checkbox(SWAP, t("Swap order of trains"), swap));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/DelayedAction.java

@@ -61,10 +61,10 @@ public class DelayedAction extends ActionList {
 	}
 		
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Minimum delay"),new Input(MIN_DELAY,min_delay).numeric().addTo(new Tag("span")).content(NBSP+"ms"));
 		formInputs.add(t("Maximum delay"),new Input(MAX_DELAY,max_delay).numeric().addTo(new Tag("span")).content(NBSP+"ms"));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	public DelayedAction setMaxDelay(int max_delay) {

src/main/java/de/srsoftware/web4rail/actions/DetermineTrainInBlock.java

@@ -55,9 +55,9 @@ public class DetermineTrainInBlock extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Block")+": "+(isNull(block) ? t("unset") : block),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,BLOCK)));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/DisableEnableBlock.java

@@ -64,13 +64,13 @@ public class DisableEnableBlock extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Block")+": "+(isNull(block) ? t("block from context") : block),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,Block.class.getSimpleName())));
 		Tag radios = new Tag("p");
 		new Radio(STATE, "enable", t("enable"), !disable).addTo(radios);
 		new Radio(STATE, "disable", t("disable"), disable).addTo(radios);
 		formInputs.add(t("Action"),radios);
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/EngageDecoupler.java

@@ -57,10 +57,10 @@ public class EngageDecoupler extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Decoupler")+": "+(isNull(decoupler) ? t("unset") : decoupler),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,DECOUPLER)));
 		
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/FinishRoute.java

@@ -2,6 +2,7 @@ package de.srsoftware.web4rail.actions;
 
 import de.srsoftware.web4rail.BaseClass;
 import de.srsoftware.web4rail.Route;
+import de.srsoftware.web4rail.moving.Train;
 
 public class FinishRoute extends Action {
 
@@ -12,7 +13,9 @@ public class FinishRoute extends Action {
 	@Override
 	public boolean fire(Context context,Object cause) {
 		Route route = context.route();
-		if (isSet(route)) route.finish();
+		Train train = context.train();
+		if (isNull(train)) return false;
+		if (isSet(route)) route.finish(train);
 		return true;
 	}
 }

src/main/java/de/srsoftware/web4rail/actions/Loop.java

@@ -73,9 +73,9 @@ public class Loop extends ActionList {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Select object"),typeSelector());
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	public String toString() {

src/main/java/de/srsoftware/web4rail/actions/SendCommand.java

@@ -71,13 +71,13 @@ public class SendCommand extends Action{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Command to send"),new Input(COMMAND, command));
 		Tag div = new Tag("div");
 		new Radio(TARGET, Target.SYSTEM, t("Operating System"), target == Target.SYSTEM).addTo(div);
 		new Radio(TARGET, Target.SRCP, t("SRCP daemon"), target == Target.SRCP).addTo(div);
 		formInputs.add(t("Send command to"),div);
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/SetContextTrain.java

@@ -52,9 +52,9 @@ public class SetContextTrain extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Select train"),Train.selector(train, null));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/SetDisplayText.java

@@ -62,9 +62,9 @@ public class SetDisplayText extends TextAction{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Display")+": "+(isNull(display) ? t("unset") : display),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,DISPLAY)));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 		
 	@Override

src/main/java/de/srsoftware/web4rail/actions/SetPower.java

@@ -58,14 +58,14 @@ public class SetPower extends Action{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Tag div = new Tag("div");
 		new Radio(STATE, POWERCHANGE.ON, t("On"), pc == POWERCHANGE.ON).addTo(div);
 		new Radio(STATE, POWERCHANGE.OFF, t("Off"), pc == POWERCHANGE.OFF).addTo(div);
 		new Radio(STATE, POWERCHANGE.TOGGLE, t("Toggle"), pc == POWERCHANGE.TOGGLE).addTo(div);
 		formInputs.add(t("Set state to"),div);
 		
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/SetRelayOrSwitch.java

@@ -79,7 +79,7 @@ public class SetRelayOrSwitch extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Tag span = new Tag("span");
 		if (isSet(relayOrSwitch)) span.content(relayOrSwitch+NBSP);
 		button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,Relay.class.getSimpleName())).addTo(span);
@@ -96,7 +96,7 @@ public class SetRelayOrSwitch extends Action {
 		}
 		formInputs.add(t("Select state"),state);
 		
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/SetSignal.java

@@ -59,7 +59,7 @@ public class SetSignal extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Signal")+": "+(isNull(signal) ? t("unset") : signal),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,SIGNAL)));
 		Select state = new Select(Signal.STATE);
 		for (String st:Signal.knownStates) {
@@ -68,7 +68,7 @@ public class SetSignal extends Action {
 		}
 		formInputs.add(t("Select state"),state);
 
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/SetSpeed.java

@@ -47,9 +47,9 @@ public class SetSpeed extends Action{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Set speed to"),new Input(MAX_SPEED, speed).numeric().addTo(new Tag("span")).content(NBSP+speedUnit));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	public int getSpeed() {

src/main/java/de/srsoftware/web4rail/actions/SetTurnout.java

@@ -66,7 +66,7 @@ public class SetTurnout extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 
 		formInputs.add(t("Turnout")+": "+(isNull(turnout) ? t("unset") : turnout),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,TURNOUT)));
 		if (isSet(turnout)) {
@@ -79,7 +79,7 @@ public class SetTurnout extends Action {
 			formInputs.add(t("Select state"),select);
 		}
 		
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/SplitTrain.java

@@ -47,9 +47,9 @@ public class SplitTrain extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Split behind"),new Input(POSITION, position).numeric().addTo(new Tag("span")).content(t("&nbsp;cars")));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/StartStopAuto.java

@@ -41,13 +41,13 @@ public class StartStopAuto extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Tag radios = new Tag("div");
 		new Radio(INVERTED, "on", t("Start autopilot"), inverted).addTo(radios);
 		new Radio(INVERTED, "off", t("Stop autopilot"), !inverted).addTo(radios);
 		formInputs.add(t("Action"), radios);
 		
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/SwitchFunction.java

@@ -61,7 +61,7 @@ public class SwitchFunction extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		
 		Select selector = new Select(FUNCTION);
 		for (int i=1; i<5;i++) {
@@ -76,7 +76,7 @@ public class SwitchFunction extends Action {
 		new Radio(EFFECT, OFF, t("Off"), effect == OFF).addTo(radioGroup);
 		formInputs.add(t("Effect"),radioGroup);
 		
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/TextAction.java

@@ -46,9 +46,9 @@ public abstract class TextAction extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Text"),new Input(TEXT, text));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 		
 	@Override

src/main/java/de/srsoftware/web4rail/actions/TriggerContact.java

@@ -41,9 +41,9 @@ public class TriggerContact extends Action {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Select contact")+": "+(isNull(contact) ? t("unset") : contact),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,CONTACT)));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/WaitForContact.java

@@ -99,7 +99,7 @@ public class WaitForContact extends ActionList {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Contact")+": "+(isNull(contact) ? t("unset") : contact),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,CONTACT)));
 		formInputs.add(t("Timeout"),new Input(TIMEOUT,timeout).numeric().addTo(new Tag("span")).content(NBSP+"ms"));
 		
@@ -108,7 +108,7 @@ public class WaitForContact extends ActionList {
 		timeoutActions.list().addTo(fieldset);
 		postForm.add(fieldset);
 
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/BlockFree.java

@@ -51,9 +51,9 @@ public class BlockFree extends Condition {
 	}
 
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Block")+": "+(isNull(block) ? t("unset") : block),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,BLOCK)));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/CarInTrain.java

@@ -38,10 +38,10 @@ public class CarInTrain extends Condition {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Select car"),Car.selector(car, null));
 		
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/CarOrientation.java

@@ -59,7 +59,7 @@ public class CarOrientation extends Condition {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Select car"),Car.selector(isSet(car) ? car : t("Car of train"), null));
 		formInputs.add(t("If car of train: inspect car number"),new Input(POSITION, position).numeric().addTo(new Tag("span")).content(NBSP+"("+t("Use negative number to count from end.")+")"));
 		
@@ -67,7 +67,7 @@ public class CarOrientation extends Condition {
 		new Radio(ORIENTATION, "f", t("forward"), orientation).addTo(radioGroup);
 		new Radio(ORIENTATION, "r", t("revers"), !orientation).addTo(radioGroup);
 
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/Condition.java

@@ -142,9 +142,9 @@ public abstract class Condition extends BaseClass {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		inversionOption(formInputs);
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	public static Select selector() {

src/main/java/de/srsoftware/web4rail/conditions/ConditionList.java

@@ -114,10 +114,10 @@ public class ConditionList extends Condition implements Iterable<Condition>{
 	}
 	
 	@Override
-	public Window properties() {
+	public Window properties(String...errors) {
 		BaseClass parent = parent();
-		if (isSet(parent)) return parent.properties();
-		return super.properties();
+		if (isSet(parent)) return parent.properties(errors);
+		return super.properties(errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/RouteEndBlock.java

@@ -57,9 +57,9 @@ public class RouteEndBlock extends Condition{
 	}
 
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Block")+": "+(isNull(block) ? t("unset") : block),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,BLOCK)));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/SwitchIsOn.java

@@ -61,10 +61,10 @@ public class SwitchIsOn extends Condition {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Select switch")+": "+(isNull(swtch) ? t("unset") : swtch),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,SWITCH)));
 
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/TrainHasTag.java

@@ -46,9 +46,9 @@ public class TrainHasTag extends Condition {
 	}
 
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Tag"),new Input(TAG, tag == null ? "" : tag));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/TrainLength.java

@@ -34,9 +34,9 @@ public class TrainLength extends Condition {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Maximum train length"),new Input(LENGTH, treshold).numeric().addTo(new Tag("span")).content(lengthUnit));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/TrainSelect.java

@@ -34,9 +34,9 @@ public class TrainSelect extends Condition {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Select train")+":",Train.selector(train, null));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/TrainSpeed.java

@@ -33,9 +33,9 @@ public class TrainSpeed extends Condition {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Train speed"),new Input(SPEED, treshold).numeric().addTo(new Tag("span")).content(speedUnit));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/conditions/TrainWasInBlock.java

@@ -48,10 +48,10 @@ public class TrainWasInBlock extends Condition {
 	}
 
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Block")+": "+(isNull(block) ? t("block from context") : block),button(t("Select from plan"),Map.of(ACTION,ACTION_UPDATE,ASSIGN,BLOCK)));
 		formInputs.add(t("Seek in last"), new Input(COUNT, count).numeric().addTo(new Tag("span")).content(NBSP+t("blocks of train")));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/moving/Car.java

@@ -243,7 +243,7 @@ public class Car extends BaseClass implements Comparable<Car>{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Name"),new Input(NAME,name));
 		formInputs.add(t("Stock ID"),new Input(STOCK_ID,stockId));
 		formInputs.add(t("Length"),new Input(LENGTH,length).attr("type", "number").addTo(new Tag("span")).content(NBSP+lengthUnit));
@@ -255,7 +255,7 @@ public class Car extends BaseClass implements Comparable<Car>{
 		if (train != null) formInputs.add(t("Train"), train.link());
 		formInputs.add(t("Current orientation"),new Tag("span").content(orientation ? t("forward") : t("reverse")));
 				
-		return super.properties(preForm,formInputs,postForm);
+		return super.properties(preForm,formInputs,postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/moving/Locomotive.java

@@ -142,7 +142,7 @@ public class Locomotive extends Car implements Constants,Device{
 		par.addTo(fieldset);
 
 		Tag direction = new Tag("p");
-		if ((isSet(train) && (train.speed > 0 || isSet(train.route()))) || (isSet(loco) && loco.speed > 0)) {
+		if ((isSet(train) && train.isStoppable()) || (isSet(loco) && loco.speed > 0)) {
 			params.put(ACTION, ACTION_STOP);
 			new Button(t("Stop"),params).clazz(ACTION_STOP).addTo(direction);			
 		}
@@ -338,7 +338,7 @@ public class Locomotive extends Car implements Constants,Device{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		preForm.add(cockpit(this));
 		Tag div = new Tag("div");
 		for (Protocol proto : Protocol.values()) {
@@ -347,7 +347,7 @@ public class Locomotive extends Car implements Constants,Device{
 		formInputs.add(t("Protocol"),div);
 		formInputs.add(t("Address"),new Input(ADDRESS, address).numeric());
 		postForm.add(programming());
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 
 	private void queue() {

src/main/java/de/srsoftware/web4rail/moving/Train.java

@@ -48,15 +48,6 @@ import de.srsoftware.web4rail.tiles.Tile.Status;
  * @author Stephan Richter, SRSoftware 2020-2021 * 
  */
 public class Train extends BaseClass implements Comparable<Train> {
-	
-	public interface Listener {
-		enum Signal {
-			STOP
-		}
-		
-		public void on(Signal signal);
-	}
-
 	private static final Logger LOG = LoggerFactory.getLogger(Train.class);
 
 	private static final String CAR_ID  = "carId";
@@ -101,10 +92,10 @@ public class Train extends BaseClass implements Comparable<Train> {
 	private static final String SHUNTING = "shunting";
 	private boolean shunting = false;
 
-	private HashSet<Listener> listeners = new HashSet<Train.Listener>();
-
 	private BrakeProcessor brakeProcessor;
 
+	private PathFinder pathFinder;
+
 	public static Object action(HashMap<String, String> params, Plan plan) throws IOException {
 		String action = params.get(ACTION);
 		if (isNull(action)) return t("No action passed to Train.action!");
@@ -150,8 +141,8 @@ public class Train extends BaseClass implements Comparable<Train> {
 			case ACTION_SLOWER10:
 				return train.slower(10);
 			case ACTION_START:
-				train.start();
-				return train.properties();
+				String error = train.start();
+				return train.properties(error);
 			case ACTION_STOP:
 				return train.stopNow();
 			case ACTION_TIMES:
@@ -186,10 +177,6 @@ public class Train extends BaseClass implements Comparable<Train> {
 		return properties();
 	}
 
-	public void addListener(Listener listener) {
-		listeners.add(listener);
-	}
-	
 	public boolean automatic() {
 		return false;		
 	}
@@ -323,7 +310,7 @@ public class Train extends BaseClass implements Comparable<Train> {
 	public void contact(Contact contact) {
 		if (isSet(route)) {
 			Route lastRoute = route; // route field might be set to null during route.contact(...)!
-			route.contact(contact);
+			route.contact(new Context(contact).train(this));
 			traceFrom(contact,lastRoute);
 		}
 	}
@@ -625,7 +612,7 @@ public class Train extends BaseClass implements Comparable<Train> {
 
 			
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Tag propList = new Tag("ul").clazz("proplist");		
 		
 		if (isSet(currentBlock)) currentBlock.button(currentBlock.toString()).addTo(new Tag("li").content(t("Current location")+COL)).addTo(propList);
@@ -675,7 +662,7 @@ public class Train extends BaseClass implements Comparable<Train> {
 		postForm.add(blockHistory());
 		
 		
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 
 	public Object quitAutopilot() {
@@ -878,34 +865,37 @@ public class Train extends BaseClass implements Comparable<Train> {
 	}
 
 
-	public void start() {
-		new PathFinder(this,currentBlock,direction) {
+	public String start() {
+		if (isSet(pathFinder)) return t("Pathfinder already active for {}!",this);
+		pathFinder = new PathFinder(this,currentBlock,direction) {
 			
 			@Override
 			public void aborted() {
-				LOG.debug("Aborted");
+				plan.stream(t("Aborting route allocation..."));
+				LOG.debug("{} aborted",this);
 			}
 			
 			@Override
 			public void found(Route newRoute) {
-				// TODO Auto-generated method stub
-				LOG.debug("Found route {} for {}",newRoute,Train.this);
+				LOG.debug("Found route {} for {}",newRoute,Train.this);				
 			}
 
 			@Override
 			public void locked(Route newRoute) {
-				// TODO Auto-generated method stub
 				LOG.debug("Locked route {} for {}",newRoute,Train.this);
 			}
 			
 			@Override
 			public void prepared(Route newRoute) {
 				LOG.debug("Prepared route {} for {}",newRoute,Train.this);
-				newRoute.start(Train.this);
+				route = newRoute;
+				pathFinder = null;
+				route.start(Train.this);
 			}
 
 	
 		}.start();
+		return null;
 	}
 
 	public static void startAll() {
@@ -930,9 +920,12 @@ public class Train extends BaseClass implements Comparable<Train> {
 		brakeProcessor = new BrakeProcessor(this).start();
 	}
 
-	public Object stopNow() {
+	public Window stopNow() {
 		setSpeed(0);
-		listeners.forEach(listener -> listener.on(Listener.Signal.STOP)); // abort PathFinder
+		if (isSet(pathFinder)) {
+			pathFinder.abort();
+			pathFinder = null;
+		}
 		if (isSet(route)) {
 			route.reset();
 			route = null;
@@ -986,8 +979,7 @@ public class Train extends BaseClass implements Comparable<Train> {
 					newTrace.add(tile);
 					remainingLength -= tile.length();
 				} else if (Route.freeBehindTrain) {
-					
-					// TODO
+					tile.free();
 				} else break;				
 			}
 		}		
@@ -1031,4 +1023,11 @@ public class Train extends BaseClass implements Comparable<Train> {
 	public boolean usesAutopilot() {
 		return false; // TODO
 	}
+
+	public boolean isStoppable() {
+		if (speed > 0) return true;
+		if (isSet(pathFinder)) return true;
+		if (isSet(route)) return true;
+		return false;
+	}
 }

src/main/java/de/srsoftware/web4rail/threads/BrakeProcessor.java

@@ -39,10 +39,12 @@ public class BrakeProcessor extends BaseClass implements Runnable {
 		int step = brakeTime;
 		for (int i = 0; i < 15; i++) {
 			long calculatedDistance = calculate(brakeTime, startSpeed);
-			step /= 2;
-			if (step < 1) step = 1;
-			if (measuredDistance > calculatedDistance) brakeTime += step;
-			if (measuredDistance < calculatedDistance) brakeTime -= step;
+			if (measuredDistance > calculatedDistance) brakeTime += brakeTime/2;
+			if (measuredDistance < calculatedDistance) {
+				step /= 2;
+				if (step < 1) step = 1;
+				brakeTime -= step;
+			}
 			LOG.debug("new brake time: {}, calculated distance: {}", brakeTime, calculatedDistance);
 		}
 		route.brakeTime(train.brakeId(), brakeTime);

src/main/java/de/srsoftware/web4rail/threads/PathFinder.java

@@ -18,7 +18,7 @@ import de.srsoftware.web4rail.tiles.Block;
 /**
  * @author Stephan Richter, SRSoftware 2020-2021 
  */
-public abstract class PathFinder extends BaseClass implements Runnable, Train.Listener{
+public abstract class PathFinder extends BaseClass implements Runnable{
 	public static final Logger LOG = LoggerFactory.getLogger(PathFinder.class);
 //	private Context context;
 	private boolean aborted = false;
@@ -150,14 +150,21 @@ public abstract class PathFinder extends BaseClass implements Runnable, Train.Li
 	public void run() {		
 		while (true) {
 			if (aborted) return;
-			Route route = chooseRoute();
+			Route route = chooseRoute();			
 			if (isSet(route)) {
-				found(route);
 				if (aborted) return;
+				found(route);
 				if (route.allocateFor(train)) {
+					if (aborted) {
+						route.reset();
+						return;
+					}
 					locked(route);
-					if (aborted) return;
 					if (route.prepareFor(train)) {
+						if (aborted) {
+							route.reset();
+							return;
+						}
 						prepared(route);
 						return;
 					}
@@ -172,19 +179,10 @@ public abstract class PathFinder extends BaseClass implements Runnable, Train.Li
 	public abstract void found(Route r);
 	public abstract void prepared(Route r);
 	
-	@Override
-	public void on(Signal signal) {
-		switch (signal) {
-		case STOP:
-			abort();
-			break;
-		}
-	}
-	
-	public void start() {
-		train.addListener(this);
+	public PathFinder start() {
 		Thread thread = new Thread(this);
 		thread.setName("Pathfinder("+train+")");
 		thread.start();
+		return this;
 	}
 }

src/main/java/de/srsoftware/web4rail/tiles/Block.java

@@ -325,14 +325,14 @@ public abstract class Block extends StretchableTile{
 
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Name"),new Input(NAME, name));
 		formInputs.add("",new Checkbox(ALLOW_TURN,t("Turn allowed"),turnAllowed));
 		formInputs.add(t("Train"),Train.selector(train, null));
 		postForm.add(contactForm());
 		postForm.add(waitTimeForm());
 		if (!parkedTrains.isEmpty()) postForm.add(parkedTrainList());
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 
 	public Tile raise(String tag) {

src/main/java/de/srsoftware/web4rail/tiles/Bridge.java

@@ -75,12 +75,12 @@ public abstract class Bridge extends Tile {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Fieldset fieldset = new Fieldset(t("Counterpart"));
 		new Tag("p").content(isSet(counterpart) ? t("Connected to {}.",counterpart) : t("Not connected to other bridge part!")).addTo(fieldset);		
 		button(t("Select counterpart"),Map.of(ACTION,ACTION_CONNECT)).addTo(fieldset);
 		preForm.add(fieldset);
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 
 	public Window propMenu() {

src/main/java/de/srsoftware/web4rail/tiles/Contact.java

@@ -190,7 +190,7 @@ public class Contact extends Tile{
 	}
 
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Tag span = new Tag("span");
 		new Input(ADDRESS, addr).numeric().addTo(span).content(NBSP);
 		button(t("learn"),Map.of(ACTION,ACTION_ANALYZE)).addTo(span);
@@ -199,7 +199,7 @@ public class Contact extends Tile{
 		Fieldset fieldset = new Fieldset(t("Actions")).id("props-actions");
 		actions.list().addTo(fieldset);
 		postForm.add(fieldset);
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/tiles/Decoupler.java

@@ -111,7 +111,7 @@ public abstract class Decoupler extends Tile implements Device{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Tag div = new Tag("div");
 		for (Protocol proto : Protocol.values()) {
 			new Radio(PROTOCOL, proto.toString(), t(proto.toString()), proto == protocol).addTo(div);
@@ -120,7 +120,7 @@ public abstract class Decoupler extends Tile implements Device{
 		formInputs.add(t("Address"),new Input(ADDRESS, address).numeric());
 		formInputs.add(t("Port"),new Input(PORT, port).numeric());
 
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	private char proto() {

src/main/java/de/srsoftware/web4rail/tiles/Relay.java

@@ -124,7 +124,7 @@ public class Relay extends Tile implements Device{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Name"),new Input(NAME,name));
 		Tag div = new Tag("div");
 		for (Protocol proto : Protocol.values()) {
@@ -136,7 +136,7 @@ public class Relay extends Tile implements Device{
 		formInputs.add(t("Label for state {}","B"),new Input(LABEL_B, stateLabelB));
 		formInputs.add(t("Port for state {}",stateLabelA),new Input(PORT_A, portA).numeric());
 		formInputs.add(t("Port for state {}",stateLabelB),new Input(PORT_B, portB).numeric());
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 		
 	private char proto() {

src/main/java/de/srsoftware/web4rail/tiles/Signal.java

@@ -127,7 +127,7 @@ public abstract class Signal extends Tile {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Fieldset aspectEditor = new Fieldset(t("Aspects")).id("props-aspects");
 		Form form = new Form("aspect-form");
 		new Input(REALM,REALM_PLAN).hideIn(form);
@@ -158,7 +158,7 @@ public abstract class Signal extends Tile {
 		form.addTo(aspectEditor);
 		
 		postForm.add(aspectEditor);
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 
 	public boolean state(String aspect) {

src/main/java/de/srsoftware/web4rail/tiles/StretchableTile.java

@@ -56,9 +56,9 @@ public abstract class StretchableTile extends TileWithShadow {
 	}
 		
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(stretchType(),new Input(STRETCH_LENGTH, stretch).numeric().addTo(new Tag("span")).content(NBSP+t("Tile(s)")));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/tiles/Switch.java

@@ -126,7 +126,7 @@ public class Switch extends Tile{
 	}
 
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Fieldset fieldset = new Fieldset(t("Actions (On)"));
 		fieldset.id("actionsOn");
 		actionsOn.list().addTo(fieldset);
@@ -135,7 +135,7 @@ public class Switch extends Tile{
 		fieldset.id("actionsOff");
 		actionsOff.list().addTo(fieldset);
 		postForm.add(fieldset);
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/tiles/TextDisplay.java

@@ -33,9 +33,9 @@ public class TextDisplay extends StretchableTile {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Text"),new Input(TEXT, text));
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 
 	public static Select selector(TextDisplay preselected,Collection<TextDisplay> exclude) {

src/main/java/de/srsoftware/web4rail/tiles/Tile.java

@@ -260,7 +260,7 @@ public abstract class Tile extends BaseClass implements Comparable<Tile>{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Fieldset fieldset = null;
 		
 		if (isSet(train)) {
@@ -332,7 +332,7 @@ public abstract class Tile extends BaseClass implements Comparable<Tile>{
 			}
 		}
 		
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	private static String replace(String line, Entry<String, Object> replacement) {

src/main/java/de/srsoftware/web4rail/tiles/Turnout.java

@@ -116,14 +116,14 @@ public abstract class Turnout extends Tile implements Device{
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		Tag div = new Tag("div");
 		for (Protocol proto : Protocol.values()) {
 			new Radio(PROTOCOL, proto.toString(), t(proto.toString()), proto == protocol).addTo(div);
 		}
 		formInputs.add(t("Protocol"),div);
 		formInputs.add(t("Address"),new Input(ADDRESS, address).numeric());
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	private char proto() {

src/main/java/de/srsoftware/web4rail/tiles/TurnoutL.java

@@ -36,10 +36,10 @@ public abstract class TurnoutL extends Turnout {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Straight port")+COL,new Input(STRAIGHT, portA).numeric());
 		formInputs.add(t("Left port")+COL,new Input(LEFT, portB).numeric());
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override

src/main/java/de/srsoftware/web4rail/tiles/TurnoutR.java

@@ -37,10 +37,10 @@ public abstract class TurnoutR extends Turnout {
 	}
 	
 	@Override
-	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm) {
+	protected Window properties(List<Fieldset> preForm, FormInput formInputs, List<Fieldset> postForm,String...errors) {
 		formInputs.add(t("Straight port")+COL,new Input(STRAIGHT, portA).numeric());
 		formInputs.add(t("Right port")+COL,new Input(RIGHT, portB).numeric());
-		return super.properties(preForm, formInputs, postForm);
+		return super.properties(preForm, formInputs, postForm,errors);
 	}
 	
 	@Override