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package org.netbeans.lib.profiler.ui.charts;

import java.awt.Color;
import java.util.Iterator;
import java.util.Vector;

 * @author Jiri Sedlacek
00055 public abstract class AbstractPieChartModel implements PieChartModel {
    //~ Instance fields ----------------------------------------------------------------------------------------------------------

    private Vector listeners; // Data change listeners

    //~ Methods ------------------------------------------------------------------------------------------------------------------

    public abstract Color getItemColor(int index); // color of item

    // --- Abstract PieChartModel ------------------------------------------------
    public abstract int getItemCount(); // number of displayed (processed) items

    public abstract String getItemName(int index); // name of item

    public abstract double getItemValue(int index); // value of item

    public abstract double getItemValueRel(int index); // relative item value (<0, 1>, E(items) = 1)

    public abstract boolean hasData(); // does the model contain some non-zero item?

    // --- Listeners -------------------------------------------------------------

     * Adds new ChartModel listener.
     * @param listener ChartModel listener to add
00081     public synchronized void addChartModelListener(ChartModelListener listener) {
        if (listeners == null) {
            listeners = new Vector();

        if (!listeners.contains(listener)) {

     * Removes ChartModel listener.
     * @param listener ChartModel listener to remove
00095     public synchronized void removeChartModelListener(ChartModelListener listener) {
        if (listeners != null) {

     * Notifies all listeners about the data change.
00104     protected void fireChartDataChanged() {
        if (listeners == null) {

        Vector toNotify;

        synchronized (this) {
            toNotify = ((Vector) listeners.clone());

        Iterator iterator = toNotify.iterator();

        while (iterator.hasNext()) {
            ((ChartModelListener) iterator.next()).chartDataChanged();

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