001: /*--
002:
003: Copyright (C) 2002 Anthony Eden.
004: All rights reserved.
005:
006: Redistribution and use in source and binary forms, with or without
007: modification, are permitted provided that the following conditions
008: are met:
009:
010: 1. Redistributions of source code must retain the above copyright
011: notice, this list of conditions, and the following disclaimer.
012:
013: 2. Redistributions in binary form must reproduce the above copyright
014: notice, this list of conditions, and the disclaimer that follows
015: these conditions in the documentation and/or other materials
016: provided with the distribution.
017:
018: 3. The names "OBE" and "Open Business Engine" must not be used to
019: endorse or promote products derived from this software without prior
020: written permission. For written permission, please contact
021: me@anthonyeden.com.
022:
023: 4. Products derived from this software may not be called "OBE" or
024: "Open Business Engine", nor may "OBE" or "Open Business Engine"
025: appear in their name, without prior written permission from
026: Anthony Eden (me@anthonyeden.com).
027:
028: In addition, I request (but do not require) that you include in the
029: end-user documentation provided with the redistribution and/or in the
030: software itself an acknowledgement equivalent to the following:
031: "This product includes software developed by
032: Anthony Eden (http://www.anthonyeden.com/)."
033:
034: THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
035: WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
036: OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
037: DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
038: INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
039: (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
040: SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
041: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
042: STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
043: IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
044: POSSIBILITY OF SUCH DAMAGE.
045:
046: For more information on OBE, please see <http://obe.sourceforge.net/>.
047:
048: */
049:
050: package org.obe.designer.event;
051:
052: import java.awt.*;
053: import java.awt.event.MouseAdapter;
054: import java.awt.event.MouseEvent;
055: import java.beans.PropertyVetoException;
056: import org.apache.commons.logging.Log;
057: import org.apache.commons.logging.LogFactory;
058: import org.obe.designer.OBEGraph;
059: import org.obe.designer.OBEGraphCell;
060: import org.obe.designer.util.EditMode;
061: import org.obe.designer.view.ActivityView;
062: import org.obe.util.ErrorHandler;
063:
064: public class ConnectMouseListener extends MouseAdapter {
065: private static final Log log = LogFactory
066: .getLog(ConnectMouseListener.class);
067:
068: private OBEGraph graph;
069: private ActivityView from;
070:
071: public ConnectMouseListener(OBEGraph graph) {
072: this .graph = graph;
073: }
074:
075: /**
076: * Clear the source activity if one is specified.
077: */
078:
079: public void reset() {
080: from = null;
081: }
082:
083: public void mousePressed(MouseEvent evt) {
084: if (graph.getEditMode() == EditMode.CONNECT) {
085: try {
086: connect(evt.getPoint());
087: } catch (PropertyVetoException e) {
088: ErrorHandler.handleError(e);
089: }
090: }
091: }
092:
093: public void connect(Point p) throws PropertyVetoException {
094: Object cell = graph.getFirstCellForLocation(p.x, p.y);
095: if (cell == null) {
096: from = null;
097: } else if (cell instanceof OBEGraphCell) {
098: connect((OBEGraphCell) cell);
099: }
100: }
101:
102: public void connect(OBEGraphCell cell) throws PropertyVetoException {
103: Object userObject = cell.getUserObject();
104: if (userObject instanceof ActivityView) {
105: ActivityView activityView = (ActivityView) userObject;
106: if (from == null) {
107: from = activityView;
108: } else if (from == activityView) {
109: log.debug("Can't connect to self");
110: } else {
111: log.debug("Adding transition");
112: graph.addTransition(from, activityView);
113: from = null;
114: }
115: }
116: }
117: }
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