switch behaves like an input, see #319

src/main/java/de/neemann/digital/core/element/Keys.java

@@ -815,4 +815,9 @@ public final class Keys {
             new Key<>("wireToolTips", false);
 
 
+    /**
+     * The switch acts as input
+     */
+    public static final Key<Boolean> SWITCH_ACTS_AS_INPUT =
+            new Key<>("switchActsAsInput", false).setSecondary();
 }

src/main/java/de/neemann/digital/core/switching/Switch.java

@@ -25,10 +25,14 @@ public class Switch implements Element, NodeInterface, Countable {
             .addAttribute(Keys.BITS)
             .addAttribute(Keys.LABEL)
             .addAttribute(Keys.POLES)
-            .addAttribute(Keys.CLOSED);
+            .addAttribute(Keys.CLOSED)
+            .addAttribute(Keys.SWITCH_ACTS_AS_INPUT);
 
     private final PlainSwitch[] poles;
+    private final String label;
+    private final boolean switchActsAsInput;
     private boolean closed;
+    private ObservableValue value;
 
     /**
      * Create a new instance
@@ -52,6 +56,8 @@ public class Switch implements Element, NodeInterface, Countable {
         poles = new PlainSwitch[poleCount];
         for (int i = 0; i < poleCount; i++)
             poles[i] = new PlainSwitch(bits, closed, "A" + (i + 1), "B" + (i + 1));
+        label = attr.getLabel();
+        switchActsAsInput = attr.get(Keys.SWITCH_ACTS_AS_INPUT);
     }
 
     @Override
@@ -79,6 +85,21 @@ public class Switch implements Element, NodeInterface, Countable {
 
     @Override
     public void registerNodes(Model model) {
+        if (switchActsAsInput && !label.isEmpty()) {
+            value = new ObservableValue(label, 1);
+            value.addObserver(new NodeInterface() {
+                @Override
+                public ObservableValues getOutputs() {
+                    return value.asList();
+                }
+
+                @Override
+                public void hasChanged() {
+                    setClosed(value.getBool());
+                }
+            });
+            model.addInput(new Signal(label, value));
+        }
     }
 
     @Override
@@ -93,9 +114,13 @@ public class Switch implements Element, NodeInterface, Countable {
      * @param closed true if closed
      */
     public void setClosed(boolean closed) {
-        this.closed = closed;
+        if (this.closed != closed) {
-        for (PlainSwitch p : poles)
+            if (value != null)
-            p.setClosed(closed);
+                value.setBool(closed);
+            this.closed = closed;
+            for (PlainSwitch p : poles)
+                p.setClosed(closed);
+        }
     }
 
     /**

src/main/resources/lang/lang_de.xml

@@ -1361,6 +1361,10 @@ Sind evtl. die Namen der Variablen nicht eindeutig?</string>
     <string name="key_showTutorial">Tutorial beim Start anzeigen</string>
     <string name="key_showTutorial_tt">Aktiviert das Tutorial.</string>
 
+    <string name="key_switchActsAsInput">Schalter verhält sich wie ein Eingang</string>
+    <string name="key_switchActsAsInput_tt">Wird das Model analysiert, verhält sich der Schalter wie ein Eingang, wobei
+        "offen" einer '0' und "geschlossen" einer '1' entspricht.</string>
+
     <string name="menu_exportSVGSettings">SVG Exporteinstellungen</string>
     <string name="key_SVG_LaTeX">Text im LaTeX-Format</string>
     <string name="key_SVG_LaTeX_tt">Text wird in LaTeX-Notation eingefügt. Inkscape ist für die Weiterverabeitung erforderlich.</string>

src/main/resources/lang/lang_en.xml

@@ -1347,6 +1347,9 @@
     <string name="key_showTutorial">Show Tutorial at Startup</string>
     <string name="key_showTutorial_tt">Enables the tutorial.</string>
 
+    <string name="key_switchActsAsInput">Switch behaves like an input</string>
+    <string name="key_switchActsAsInput_tt">If the model is analyzed, the switch behaves like an input, where "open" corresponds to '0' and "closed" to '1'.</string>
+
     <string name="menu_exportSVGSettings">SVG Export Settings</string>
     <string name="key_SVG_LaTeX">Text in LaTeX notation</string>
     <string name="key_SVG_LaTeX_tt">Text is inserted in LaTeX notation. Inkscape is required for further processing.</string>