/* 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.circuit;
import java.awt.Graphics;
import java.util.HashMap;
import java.util.HashSet;
import com.cburch.logisim.comp.Component;
import com.cburch.logisim.comp.ComponentDrawContext;
import com.cburch.logisim.data.Bounds;
import com.cburch.logisim.data.Location;
import com.cburch.logisim.util.GraphicsUtil;
class PropagationPoints {
private static class Entry {
private CircuitState state;
private Location loc;
private Entry(CircuitState state, Location loc) {
this.state = state;
this.loc = loc;
}
@Override
public boolean equals(Object other) {
if (!(other instanceof Entry)) return false;
Entry o = (Entry) other;
return state.equals(o.state) && loc.equals(o.loc);
}
@Override
public int hashCode() {
return state.hashCode() * 31 + loc.hashCode();
}
}
private HashSet<Entry> data;
PropagationPoints() {
this.data = new HashSet<Entry>();
}
void add(CircuitState state, Location loc) {
data.add(new Entry(state, loc));
}
void clear() {
data.clear();
}
boolean isEmpty() {
return data.isEmpty();
}
void draw(ComponentDrawContext context) {
if (data.isEmpty()) return;
CircuitState state = context.getCircuitState();
HashMap<CircuitState,CircuitState> stateMap = new HashMap<CircuitState,CircuitState>();
for (CircuitState s : state.getSubstates()) {
addSubstates(stateMap, s, s);
}
Graphics g = context.getGraphics();
GraphicsUtil.switchToWidth(g, 2);
for (Entry e : data) {
if (e.state == state) {
Location p = e.loc;
g.drawOval(p.getX() - 4, p.getY() - 4, 8, 8);
} else if (stateMap.containsKey(e.state)) {
CircuitState substate = stateMap.get(e.state);
Component subcirc = substate.getSubcircuit();
Bounds b = subcirc.getBounds();
g.drawRect(b.getX(), b.getY(), b.getWidth(), b.getHeight());
}
}
GraphicsUtil.switchToWidth(g, 1);
}
private void addSubstates(HashMap<CircuitState,CircuitState> map,
CircuitState source, CircuitState value) {
map.put(source, value);
for (CircuitState s : source.getSubstates()) {
addSubstates(map, s, value);
}
}
}