Last change
on this file since 12540 was 12369, checked in by michael2402, 7 years ago |
Javadoc for gui.progress package
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[1811] | 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.gui.progress;
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| 3 |
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| 4 | import java.util.ArrayList;
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| 5 | import java.util.List;
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| 6 |
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| 7 | import org.openstreetmap.josm.gui.progress.ProgressMonitor.CancelListener;
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| 8 |
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[12369] | 9 | /**
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| 10 | * A handler that notifies all listeners that a given operation was canceled.
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| 11 | */
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[1811] | 12 | public class CancelHandler {
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| 13 |
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| 14 | private boolean isCanceled;
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[9078] | 15 | private final List<CancelListener> listeners = new ArrayList<>();
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[1811] | 16 |
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[12369] | 17 | /**
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| 18 | * Cancels the operation. This call is ignored if the operation was already canceled.
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| 19 | */
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[1811] | 20 | public synchronized void cancel() {
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| 21 | if (!isCanceled) {
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| 22 | isCanceled = true;
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| 23 | for (CancelListener listener:listeners) {
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| 24 | listener.operationCanceled();
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| 25 | }
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| 26 | }
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| 27 | }
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| 28 |
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[12369] | 29 | /**
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| 30 | * Checks if the operation was canceled
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| 31 | * @return <code>true</code> if {@link #cancel()} was called.
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| 32 | */
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[1811] | 33 | public synchronized boolean isCanceled() {
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| 34 | return isCanceled;
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| 35 | }
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| 36 |
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[12369] | 37 | /**
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| 38 | * Adds a new cancel listener
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| 39 | * @param listener The listener to add
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| 40 | */
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[1811] | 41 | public synchronized void addCancelListener(CancelListener listener) {
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| 42 | listeners.add(listener);
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| 43 | }
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| 44 |
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[12369] | 45 | /**
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| 46 | * Removes a cancel listener
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| 47 | * @param listener The listener to remove
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| 48 | */
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[1811] | 49 | public synchronized void removeCancelListener(CancelListener listener) {
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| 50 | listeners.remove(listener);
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| 51 | }
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| 52 |
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| 53 | }
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