added fit, zoom in and zoom out

src/main/java/de/neemann/digital/gui/Main.java

@@ -76,6 +76,9 @@ public class Main extends JFrame implements ClosingWindowListener.ConfirmSave, E
     private static final Icon ICON_SAVE = IconCreator.create("Save24.gif");
     private static final Icon ICON_SAVE_AS = IconCreator.create("SaveAs24.gif");
     private static final Icon ICON_FAST = IconCreator.create("FastForward24.gif");
+    private static final Icon ICON_EXPAND = IconCreator.create("Expand24.gif");
+    private static final Icon ICON_ZOOMIN = IconCreator.create("ZoomIn24.gif");
+    private static final Icon ICON_ZOOMOUT = IconCreator.create("ZoomOut24.gif");
     private final CircuitComponent circuitComponent;
     private final ToolTipAction save;
     private ToolTipAction doStep;
@@ -180,6 +183,10 @@ public class Main extends JFrame implements ClosingWindowListener.ConfirmSave, E
         save = createFileMenu(menuBar, toolBar, normalMode);
         toolBar.addSeparator();
 
+        createViewMenu(menuBar, toolBar);
+
+        toolBar.addSeparator();
+
         ToolTipAction elementStateAction = elementState.createToolTipAction(Lang.get("menu_element"), ICON_ELEMENT).setToolTip(Lang.get("menu_element_tt"));
 
         createEditMenu(menuBar, elementStateAction);
@@ -207,6 +214,30 @@ public class Main extends JFrame implements ClosingWindowListener.ConfirmSave, E
         setLocationRelativeTo(parent);
     }
 
+    private void createViewMenu(JMenuBar menuBar, JToolBar toolBar) {
+        ToolTipAction maximize = new ToolTipAction(Lang.get("menu_maximize"), ICON_EXPAND) {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                circuitComponent.fitCircuit();
+            }
+        };
+        ToolTipAction zoomIn = new ToolTipAction(Lang.get("menu_zoomIn"), ICON_ZOOMIN) {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                circuitComponent.scaleCircuit(1.2);
+            }
+        };
+        ToolTipAction zoomOut = new ToolTipAction(Lang.get("menu_zoomOut"), ICON_ZOOMOUT) {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                circuitComponent.scaleCircuit(0.8);
+            }
+        };
+        toolBar.add(zoomIn.createJButtonNoText());
+        toolBar.add(zoomOut.createJButtonNoText());
+        toolBar.add(maximize.createJButtonNoText());
+    }
+
     /**
      * Creates the file menu and adds it to menu and toolbar
      *

src/main/java/de/neemann/digital/gui/components/CircuitComponent.java

@@ -271,7 +271,14 @@ public class CircuitComponent extends JComponent {
      */
     public void setCircuit(Circuit circuit) {
         this.circuit = circuit;
+        fitCircuit();
+        setModeAndReset(false);
+    }
 
+    /**
+     * maximizes the circuit shown
+     */
+    public void fitCircuit() {
         GraphicMinMax gr = new GraphicMinMax();
         circuit.drawTo(gr);
         if (gr.getMin() != null && getWidth() != 0 && getHeight() != 0) {
@@ -290,8 +297,26 @@ public class CircuitComponent extends JComponent {
             transform.translate(dif.x / s, dif.y / s);  // move drawing center to frame center
         } else
             transform = new AffineTransform();
+        repaint();
+    }
 
-        setModeAndReset(false);
+    /**
+     * scales the circuit
+     *
+     * @param f factor to scale
+     */
+    public void scaleCircuit(double f) {
+        try {
+            Point2D.Double p = new Point2D.Double();
+            transform.inverseTransform(new Point(getWidth() / 2, getHeight() / 2), p);
+            Vector dif = new Vector((int) Math.round(p.getX()), (int) Math.round(p.getY()));
+            transform.translate(dif.x, dif.y);
+            transform.scale(f, f);
+            transform.translate(-dif.x, -dif.y);
+            repaint();
+        } catch (NoninvertibleTransformException e1) {
+            throw new RuntimeException(e1);
+        }
     }
 
     private void editAttributes(VisualElement vp, MouseEvent e) {
@@ -336,7 +361,7 @@ public class CircuitComponent extends JComponent {
         @Override
         public void mouseReleased(MouseEvent e) {
             activeMouseController.released(e);
-            if (!wasMoved(e))
+            if (!(wasMoved(e) || isMoved))
                 activeMouseController.clicked(e);
         }
 

src/main/resources/lang/lang_de.properties

@@ -270,6 +270,11 @@ menu_analyse=Analyse
 menu_analyse_tt=Analyse der aktuellen Schaltung
 menu_synthesise=Synthese
 menu_synthesise_tt=Erzeugt minimale boolsche Ausdr\u00FCcke, welche durch eine Wahrheitstabelle beschrieben werden.
+menu_maximize=maximieren
+menu_zoomIn=vergr\u00F6\u00DFern
+menu_zoomOut=verkleinern
+
+
 menu_table_size=Gr\u00F6\u00DFe
 menu_table_N_variables={0} Variablen
 menu_table_reorder=Umsortieren

src/main/resources/lang/lang_en.properties

@@ -249,6 +249,11 @@ menu_analyse=Analyse
 menu_analyse_tt=Analyses the actual circuit
 menu_synthesise=Synthesise
 menu_synthesise_tt=Generates the minimal bool expressions described by a truth table.
+menu_maximize=Maximize
+menu_zoomIn=zoom in
+menu_zoomOut=zoom out
+
+
 menu_table_size=Size
 menu_table_N_variables={0} Variables
 menu_table_reorder=Reorder