/* Copyright (c) 2010, Carl Burch. License information is located in the
* com.cburch.logisim.Main source code and at www.cburch.com/logisim/. */
package com.cburch.logisim.std.gates;
import java.awt.Graphics;
import com.cburch.logisim.analyze.model.Expression;
import com.cburch.logisim.analyze.model.Expressions;
import com.cburch.logisim.data.Value;
import com.cburch.logisim.instance.Instance;
import com.cburch.logisim.instance.InstancePainter;
import com.cburch.logisim.instance.InstanceState;
import com.cburch.logisim.tools.WireRepairData;
import com.cburch.logisim.util.GraphicsUtil;
class NorGate extends AbstractGate {
public static NorGate FACTORY = new NorGate();
private NorGate() {
super("NOR Gate", Strings.getter("norGateComponent"));
setNegateOutput(true);
setRectangularLabel(OrGate.FACTORY.getRectangularLabel(null));
setIconNames("norGate.gif", "norGateRect.gif", "dinNorGate.gif");
setPaintInputLines(true);
}
@Override
public void paintIconShaped(InstancePainter painter) {
Graphics g = painter.getGraphics();
GraphicsUtil.drawCenteredArc(g, 0, -5, 22, -90, 53);
GraphicsUtil.drawCenteredArc(g, 0, 23, 22, 90, -53);
GraphicsUtil.drawCenteredArc(g, -12, 9, 16, -30, 60);
g.drawOval(16, 8, 4, 4);
}
@Override
protected void paintShape(InstancePainter painter, int width, int height) {
PainterShaped.paintOr(painter, width, height);
}
@Override
protected void paintDinShape(InstancePainter painter, int width, int height,
int inputs) {
PainterDin.paintOr(painter, width, height, true);
}
@Override
protected Value computeOutput(Value[] inputs, int numInputs,
InstanceState state) {
return GateFunctions.computeOr(inputs, numInputs).not();
}
@Override
protected boolean shouldRepairWire(Instance instance, WireRepairData data) {
return !data.getPoint().equals(instance.getLocation());
}
@Override
protected Expression computeExpression(Expression[] inputs, int numInputs) {
Expression ret = inputs[0];
for (int i = 1; i < numInputs; i++) {
ret = Expressions.or(ret, inputs[i]);
}
return Expressions.not(ret);
}
@Override
protected Value getIdentity() { return Value.FALSE; }
}