01: /*
02: * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI
03: * for visualizing and manipulating spatial features with geometry and attributes.
04: *
05: * Copyright (C) 2003 Vivid Solutions
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License
09: * as published by the Free Software Foundation; either version 2
10: * of the License, or (at your option) any later version.
11: *
12: * This program is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: * GNU General Public License for more details.
16: *
17: * You should have received a copy of the GNU General Public License
18: * along with this program; if not, write to the Free Software
19: * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20: *
21: * For more information, contact:
22: *
23: * Vivid Solutions
24: * Suite #1A
25: * 2328 Government Street
26: * Victoria BC V8T 5G5
27: * Canada
28: *
29: * (250)385-6040
30: * www.vividsolutions.com
31: */
32:
33: package com.vividsolutions.jump.workbench.ui.cursortool;
34:
35: import java.awt.event.MouseEvent;
36:
37: import com.vividsolutions.jts.geom.Coordinate;
38:
39: /**
40: * Whereas a MultiClickTool looks for a double-click to end the gesture,
41: * an NClickTool looks for a certain number of points to end the gesture.
42: */
43: public abstract class NClickTool extends MultiClickTool {
44: //This class has been tested only with n=1 and n=2. [Jon Aquino]
45: private int n;
46:
47: public NClickTool(int n) {
48: this .n = n;
49: }
50:
51: protected Coordinate getModelSource() {
52: return (Coordinate) getCoordinates().get(0);
53: }
54:
55: protected Coordinate getModelDestination() {
56: return (Coordinate) getCoordinates().get(n - 1);
57: }
58:
59: protected boolean isFinishingRelease(MouseEvent e) {
60: //A double click will generate two events: one with click-count = 1,
61: //and one with click-count = n. We just want to finish the gesture
62: //once, so handle the click-count = 1 case, and ignore the others.
63: //[Jon Aquino]
64: return (e.getClickCount() == 1) && shouldGestureFinish();
65: }
66:
67: private boolean shouldGestureFinish() {
68: return getCoordinates().size() == n;
69: }
70:
71: }
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