add isPolarized to component interface

diylc/diylc-core/src/main/java/org/diylc/core/IDIYComponent.java

@@ -199,4 +199,13 @@ public interface IDIYComponent<T> extends Serializable, Cloneable {
    * @param project
    */
   void createdIn(Project project);
+
+  /**
+   * Returns whether this component is polarized (direction matters for electronic function).
+   * Default implementation returns true, components that are not polarized should override this.
+   * @return true if the component is polarized, false otherwise
+   */
+  default boolean isPolarized() {
+    return true;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/electromechanical/FuseHolderPanel.java

@@ -350,4 +350,9 @@ public class FuseHolderPanel extends AbstractMultiPartComponent<String> {
     Rectangle2D bounds = getBody()[0].getBounds2D();
     return new Rectangle2D.Double(bounds.getX() - margin, bounds.getY() - margin, bounds.getWidth() + 2 * margin, bounds.getHeight() + 2 * margin);
   }
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/AirCoreInductor.java

@@ -155,4 +155,9 @@ public class AirCoreInductor extends AbstractLeadedComponent<Inductance> {
   public void setResistance(Resistance resistance) {
     this.resistance = resistance;
   }
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/AxialElectrolyticCapacitor.java

@@ -280,4 +280,9 @@ public class AxialElectrolyticCapacitor extends AbstractLeadedComponent<Capacita
 
     return new Color((int) r, (int) g, (int) b, (int) a);
   }
+
+  @Override
+  public boolean isPolarized() {
+    return polarized;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/AxialFilmCapacitor.java

@@ -104,4 +104,9 @@ public class AxialFilmCapacitor extends AbstractFilmCapacitor implements IDatash
   public boolean getFlipStanding() {
     return super.getFlipStanding();
   }
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/CapacitorSymbol.java

@@ -96,6 +96,11 @@ public class CapacitorSymbol extends AbstractSchematicLeadedSymbol<Capacitance>
     this.polarized = polarized;
   }
 
+  @Override
+  public boolean isPolarized() {
+    return polarized;
+  }
+
   public void drawIcon(Graphics2D g2d, int width, int height) {
     g2d.rotate(-Math.PI / 4, width / 2, height / 2);
     g2d.setColor(LEAD_COLOR);

diylc/diylc-library/src/main/java/org/diylc/components/passive/CrystalOscillator.java

@@ -133,4 +133,9 @@ public class CrystalOscillator extends AbstractLeadedComponent<Frequency> implem
   protected Size getDefaultWidth() {
     return DEFAULT_WIDTH;
   }
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/FuseSymbol.java

@@ -109,4 +109,9 @@ public class FuseSymbol extends AbstractSchematicLeadedSymbol<Current> {
   protected boolean useShapeRectAsPosition() {
     return false;
   }
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/InductorSymbol.java

@@ -151,4 +151,9 @@ public class InductorSymbol extends AbstractSchematicLeadedSymbol<Inductance> {
   public void setCore(boolean core) {
     this.core = core;
   }
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/RadialCeramicDiskCapacitor.java

@@ -116,4 +116,9 @@ public class RadialCeramicDiskCapacitor extends AbstractRadialComponent<Capacita
   protected Shape getBodyShape() {
     return new Ellipse2D.Double(0f, 0f, getLength().convertToPixels(), getClosestOdd(getWidth().convertToPixels()));
   }
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/RadialElectrolytic.java

@@ -323,4 +323,9 @@ public class RadialElectrolytic extends AbstractRadialComponent<Capacitance> imp
     }
     return new Ellipse2D.Double(0f, 0f, getClosestOdd(diameter), getClosestOdd(diameter));
   }
+
+  @Override
+  public boolean isPolarized() {
+    return polarized;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/RadialFilmCapacitor.java

@@ -151,4 +151,9 @@ public class RadialFilmCapacitor extends AbstractFilmCapacitor implements IDatas
       return name().substring(0, 1) + name().substring(1).toLowerCase();
     }
   }
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/RadialInductor.java

@@ -219,4 +219,9 @@ public class RadialInductor extends AbstractRadialComponent<Inductance> {
   public void setLip(Size lip) {
     this.lip = lip;
   }
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/RadialMicaCapacitor.java

@@ -147,4 +147,9 @@ public class RadialMicaCapacitor extends AbstractRadialComponent<Capacitance> im
     a.add(new Area(new Ellipse2D.Double(length - width, 0, width, width)));
     return a;
   }
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/Resistor.java

@@ -221,6 +221,11 @@ public class Resistor extends AbstractLeadedComponent<Resistance> implements IGe
     return super.getFlipStanding();
   }
 
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
+
   public enum ResistorShape {
     Tubular, Tubular_Beveled, Standard;
     

diylc/diylc-library/src/main/java/org/diylc/components/passive/ResistorSymbol.java

@@ -160,6 +160,11 @@ public class ResistorSymbol extends AbstractSchematicLeadedSymbol<Resistance> {
   public enum DrawStyle {
 		ANSI, IEC 
 	}
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }
 
 

diylc/diylc-library/src/main/java/org/diylc/components/passive/TantalumCapacitor.java

@@ -244,4 +244,9 @@ public class TantalumCapacitor extends AbstractRadialComponent<Capacitance> {
     }
     return new Ellipse2D.Double(0f, 0f, getClosestOdd(diameter), getClosestOdd(diameter));
   }
+
+  @Override
+  public boolean isPolarized() {
+    return true;
+  }
 }

diylc/diylc-library/src/main/java/org/diylc/components/passive/ToroidalInductor.java

@@ -165,4 +165,9 @@ public class ToroidalInductor extends AbstractLeadedComponent<Inductance> implem
   public void setResistance(Resistance resistance) {
     this.resistance = resistance;
   }
+
+  @Override
+  public boolean isPolarized() {
+    return false;
+  }
 }