BJT symbol

diy-layout-creator --username bancika@gmail.com/diylc-library/src/org/diylc/components/semiconductors/AbstractTransistorSymbol.java

@@ -34,7 +34,7 @@ public abstract class AbstractTransistorSymbol extends AbstractComponent<String>
 			new Point(0, 0) };
 	protected Color color = COLOR;
 	protected Display display = Display.NAME;
-	protected Shape[] body;
+	transient protected Shape[] body;
 
 	public AbstractTransistorSymbol() {
 		super();

diy-layout-creator --username bancika@gmail.com/diylc-library/src/org/diylc/components/semiconductors/BJTPolarity.java

@@ -0,0 +1,21 @@
+package org.diylc.components.semiconductors;
+
+public enum BJTPolarity {
+
+	NPN("NPN"), PNP("PNP");
+
+	private String title;
+
+	private BJTPolarity(String title) {
+		this.title = title;
+	}
+
+	public String getTitle() {
+		return title;
+	}
+
+	@Override
+	public String toString() {
+		return title;
+	}
+}

diy-layout-creator --username bancika@gmail.com/diylc-library/src/org/diylc/components/semiconductors/BJTSymbol.java

@@ -0,0 +1,99 @@
+package org.diylc.components.semiconductors;
+
+import java.awt.Graphics2D;
+import java.awt.Polygon;
+import java.awt.Shape;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Area;
+import java.awt.geom.GeneralPath;
+
+import org.diylc.common.ObjectCache;
+import org.diylc.core.IDIYComponent;
+import org.diylc.core.annotations.ComponentDescriptor;
+import org.diylc.core.annotations.EditableProperty;
+
+@ComponentDescriptor(name = "BJT Symbol", author = "Branislav Stojkovic", category = "Semiconductors", instanceNamePrefix = "Q", description = "Bipolar junction transistor schematic symbol", stretchable = false, zOrder = IDIYComponent.COMPONENT)
+public class BJTSymbol extends AbstractTransistorSymbol {
+
+	private static final long serialVersionUID = 1L;
+
+	protected BJTPolarity polarity = BJTPolarity.NPN;
+
+	public Shape[] getBody() {
+		if (body == null) {
+			body = new Shape[3];
+			int x = controlPoints[0].x;
+			int y = controlPoints[0].y;
+			int pinSpacing = (int) PIN_SPACING.convertToPixels();
+
+			GeneralPath polyline = new GeneralPath();
+
+			polyline.moveTo(x + pinSpacing / 2, y - pinSpacing * 3 / 2);
+			polyline.lineTo(x + pinSpacing / 2, y + pinSpacing * 3 / 2);
+
+			body[0] = polyline;
+
+			polyline = new GeneralPath();
+
+			polyline.moveTo(x, y);
+			polyline.lineTo(x + pinSpacing / 2, y);
+			polyline.moveTo(x + pinSpacing / 2, y - pinSpacing * 7 / 8);
+			polyline.lineTo(x + pinSpacing * 2, y - pinSpacing * 3 / 2);
+			polyline.lineTo(x + pinSpacing * 2, y - pinSpacing * 2);
+			polyline.moveTo(x + pinSpacing / 2, y + pinSpacing * 7 / 8);
+			polyline.lineTo(x + pinSpacing * 2, y + pinSpacing * 3 / 2);
+			polyline.lineTo(x + pinSpacing * 2, y + pinSpacing * 2);
+			body[1] = polyline;
+
+			Area arrow;
+			double theta;
+			if (polarity == BJTPolarity.NPN) {
+				theta = Math.atan(5.0 / 12);
+				arrow = new Area(new Polygon(new int[] { x + pinSpacing, x + pinSpacing,
+						x + pinSpacing * 10 / 6 }, new int[] {
+						y - pinSpacing / 5 + pinSpacing * 7 / 8,
+						y + pinSpacing / 5 + pinSpacing * 7 / 8, y + pinSpacing * 7 / 8 }, 3));
+				arrow.transform(AffineTransform.getRotateInstance(theta, x + pinSpacing / 2, y
+						+ pinSpacing * 7 / 8));
+			} else {
+				theta = -Math.atan(5.0 / 12);
+				arrow = new Area(new Polygon(new int[] { x + pinSpacing, x + pinSpacing * 10 / 6,
+						x + pinSpacing * 10 / 6 }, new int[] { y - pinSpacing * 7 / 8,
+						y - pinSpacing / 5 - pinSpacing * 7 / 8,
+						y + pinSpacing / 5 - pinSpacing * 7 / 8 }, 3));
+				arrow.transform(AffineTransform.getRotateInstance(theta, x + pinSpacing / 2, y
+						- pinSpacing * 7 / 8));
+			}
+			body[2] = arrow;
+		}
+		return body;
+	}
+
+	@Override
+	public void drawIcon(Graphics2D g2d, int width, int height) {
+		g2d.setColor(COLOR);
+
+		g2d.setStroke(ObjectCache.getInstance().fetchBasicStroke(2));
+		g2d.drawLine(width / 3, height / 5, width / 3, height * 4 / 5);
+
+		g2d.setStroke(ObjectCache.getInstance().fetchBasicStroke(1));
+		g2d.drawLine(width / 8, height / 2, width / 3, height / 2);
+
+		g2d.drawLine(width * 3 / 4, 1, width * 3 / 4, height / 4);
+		g2d.drawLine(width / 3, height / 3 + 1, width * 3 / 4, height / 4);
+
+		g2d.drawLine(width * 3 / 4, height - 1, width * 3 / 4, height * 3 / 4);
+		g2d.drawLine(width / 3, height * 2 / 3 - 1, width * 3 / 4, height * 3 / 4);
+	}
+
+	@EditableProperty(name = "Polarity")
+	public BJTPolarity getPolarity() {
+		return polarity;
+	}
+
+	public void setPolarity(BJTPolarity polarity) {
+		this.polarity = polarity;
+		// Invalidate body
+		body = null;
+	}
+}