001 package de.deepamehta.plugins.topicmaps.model;
002
003 import de.deepamehta.core.JSONEnabled;
004 import de.deepamehta.core.model.TopicModel;
005 import de.deepamehta.core.util.DeepaMehtaUtils;
006
007 import org.codehaus.jettison.json.JSONObject;
008
009 import java.awt.Point;
010
011 import java.util.Map;
012 import java.util.logging.Logger;
013
014
015
016 /**
017 * A topicmap viewmodel: a collection of topics and associations plus their view properties.
018 * <p>
019 * Features:
020 * - Serialization to JSON.
021 */
022 public class TopicmapViewmodel implements JSONEnabled {
023
024 // ---------------------------------------------------------------------------------------------- Instance Variables
025
026 private TopicModel topicmapTopic;
027 private Map<Long, TopicViewmodel> topics;
028 private Map<Long, AssociationViewmodel> assocs;
029
030 private Logger logger = Logger.getLogger(getClass().getName());
031
032 // ---------------------------------------------------------------------------------------------------- Constructors
033
034 public TopicmapViewmodel(TopicModel topicmapTopic, Map<Long, TopicViewmodel> topics,
035 Map<Long, AssociationViewmodel> assocs) {
036 this.topicmapTopic = topicmapTopic;
037 this.topics = topics;
038 this.assocs = assocs;
039 }
040
041 // -------------------------------------------------------------------------------------------------- Public Methods
042
043 public long getId() {
044 return topicmapTopic.getId();
045 }
046
047 // ---
048
049 public Iterable<TopicViewmodel> getTopics() {
050 return topics.values();
051 }
052
053 public Iterable<AssociationViewmodel> getAssociations() {
054 return assocs.values();
055 }
056
057 // ---
058
059 public TopicViewmodel getTopic(long id) {
060 return topics.get(id);
061 }
062
063 public AssociationViewmodel getAssociation(long id) {
064 return assocs.get(id);
065 }
066
067 // ---
068
069 @Override
070 public JSONObject toJSON() {
071 try {
072 JSONObject topicmap = new JSONObject();
073 topicmap.put("info", topicmapTopic.toJSON());
074 topicmap.put("topics", DeepaMehtaUtils.objectsToJSON(topics.values()));
075 topicmap.put("assocs", DeepaMehtaUtils.objectsToJSON(assocs.values()));
076 return topicmap;
077 } catch (Exception e) {
078 throw new RuntimeException("Serialization failed (" + this + ")", e);
079 }
080 }
081
082 @Override
083 public String toString() {
084 return "topicmap " + getId();
085 }
086
087 // -------------------------------------------------------------------------------------------- Public Inner Classes
088
089 // Note: there is a client-side equivalent in canvas_view.js (deepamehta-webclient plugin)
090 public class GridPositioning {
091
092 // Settings
093 private final int GRID_DIST_X = 220; // MAX_TOPIC_LABEL_WIDTH + 20 pixel padding
094 private final int GRID_DIST_Y = 80;
095 private final int START_X;
096 private final int START_Y = 50;
097 private final int MIN_Y = -9999;
098
099 private final int canvasWidth;
100 private final int transX;
101
102 private int gridX;
103 private int gridY;
104
105 // --- Constructors ---
106
107 public GridPositioning(int canvasWidth, int transX) {
108 this.canvasWidth = canvasWidth;
109 this.transX = transX;
110 START_X = 50 - transX;
111 //
112 Point startPos = findStartPostition();
113 gridX = startPos.x;
114 gridY = startPos.y;
115 }
116
117 // --- Public Methods ---
118
119 public Point nextPosition() {
120 Point pos = new Point(gridX, gridY);
121 advancePosition();
122 return pos;
123 }
124
125 // --- Private Methods ---
126
127 private Point findStartPostition() {
128 int maxY = MIN_Y;
129 for (TopicViewmodel topic : topics.values()) {
130 if (topic.getY() > maxY) {
131 maxY = topic.getY();
132 }
133 }
134 int x = START_X;
135 int y = maxY != MIN_Y ? maxY + GRID_DIST_Y : START_Y;
136 return new Point(x, y);
137 }
138
139 private void advancePosition() {
140 if (gridX + GRID_DIST_X + transX > canvasWidth) {
141 gridX = START_X;
142 gridY += GRID_DIST_Y;
143 } else {
144 gridX += GRID_DIST_X;
145 }
146 }
147 }
148 }