1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
package org.cristalise.gui.graph.controller;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import org.cristalise.gui.graph.view.EditorModeListener;
import org.cristalise.gui.graph.view.EditorToolBar;
import org.cristalise.gui.graph.view.GraphPanel;
import org.cristalise.kernel.graph.model.GraphModelManager;
import org.cristalise.kernel.graph.model.GraphPoint;
import org.cristalise.kernel.graph.model.Vertex;
public class EdgeConstructionController extends MouseAdapter implements EditorModeListener
{
private GraphModelManager mGraphModelManager = null;
private GraphPanel mGraphPanel = null;
private EditorToolBar mEditorToolBar = null;
/**********/
/* States */
/**********/
private final Integer kOtherMode = new Integer(0);
private final Integer kWaitOrigin = new Integer(1);
private final Integer kWaitTerminus = new Integer(2);
/**********/
/* Events */
/**********/
private final int kEdgeEntered = 0;
private final int kOtherEntered = 1;
private final int kPressOnVertex = 2;
private final int kDrag = 3;
private final int kReleaseOnTerminus = 4;
private final int kReleaseOnNothing = 5;
/***********/
/* Actions */
/***********/
private interface Action
{
public void doIt(Object data);
}
private Action mSetOriginVertex = new Action()
{
@Override
public void doIt(Object data)
{
if(mGraphModelManager != null)
{
mGraphModelManager.getModel().setNewEdgeOriginVertex((Vertex)data);
}
}
};
private Action mSetEndPoint = new Action()
{
@Override
public void doIt(Object data)
{
if(mGraphModelManager != null)
{
Point mouse = (Point)data;
mGraphModelManager.getModel().setNewEdgeEndPoint(new GraphPoint(mouse.x, mouse.y));
}
}
};
private Action mClearEdge = new Action()
{
@Override
public void doIt(Object data)
{
if(mGraphModelManager != null)
{
mGraphModelManager.getModel().setNewEdgeOriginVertex(null);
mGraphModelManager.getModel().setNewEdgeEndPoint(null);
}
}
};
private Action mCreateEdge = new Action()
{
@Override
public void doIt(Object data)
{
if((mGraphModelManager != null) && (mEditorToolBar != null) && mGraphModelManager.isEditable())
{
mGraphModelManager.getModel().createDirectedEdge
(
mGraphModelManager.getModel().getNewEdgeOriginVertex(),
(Vertex)data,
mEditorToolBar.getSelectedEdgeType()
);
mGraphModelManager.getModel().setNewEdgeOriginVertex(null);
mGraphModelManager.getModel().setNewEdgeEndPoint(null);
}
}
};
/***********************************/
/* Finite State Transition Network */
/***********************************/
private Object[][][] mFSTN =
{// OtherMode WaitOrigin WaitTerminus
/* EdgeEntered */ {{null, kWaitOrigin}, null , null },
/* OtherEntered */ { null , {null , kOtherMode} , null },
/* PressOnVertex */ { null , {mSetOriginVertex, kWaitTerminus}, null },
/* Drag */ { null , null , {mSetEndPoint, null} },
/* ReleaseOnTerminus */ { null , null , {mCreateEdge , kWaitOrigin}},
/* ReleaseOnNothing */ { null , null , {mClearEdge , kWaitOrigin}}
};
/*****************/
/* Current state */
/*****************/
private Integer mState = kOtherMode;
/**************************/
/* Event processing logic */
/**************************/
private void processEvent(int event, Object data)
{
Object[] transition = mFSTN[event][mState.intValue()];
Action action = null;
Integer nextState = null;
if(transition != null)
{
action = (Action)transition[0];
nextState = (Integer)transition[1];
if(action != null)
{
action.doIt(data);
}
if(nextState != null)
{
mState = nextState;
}
}
}
/********************/
/* Public interface */
/********************/
public void setGraphModelManager(GraphModelManager graphModelManager)
{
mGraphModelManager = graphModelManager;
}
public void setGraphPanel(GraphPanel graphPanel)
{
mGraphPanel = graphPanel;
}
public void setEditorToolBar(EditorToolBar editorToolBar)
{
mEditorToolBar = editorToolBar;
mEditorToolBar.addEditorModeListener(this);
}
@Override
public void editorModeChanged(String idOfNewMode)
{
if(idOfNewMode.equals("Edge"))
{
processEvent(kEdgeEntered, null);
}
else
{
processEvent(kOtherEntered, null);
}
}
@Override
public void mousePressed(MouseEvent me)
{
Vertex vertex = null;
Point mousePoint = null;
if(mGraphModelManager != null && mGraphPanel != null)
{
// Determine if there is a vertex under the mouse cursor
mousePoint = me.getPoint();
vertex = mGraphPanel.getVertex(new GraphPoint(mousePoint.x, mousePoint.y));
// If the mouse has been pressed on a vertex
if(vertex != null)
{
processEvent(kPressOnVertex, vertex);
}
}
}
@Override
public void mouseReleased(MouseEvent me)
{
Vertex vertex = null;
Point mousePoint = null;
if(mGraphModelManager != null && mGraphPanel != null)
{
// Determine if there is a vertex under the mouse cursor
mousePoint = me.getPoint();
vertex = mGraphPanel.getVertex(new GraphPoint(mousePoint.x, mousePoint.y));
// If the mouse has been released on a vertex which is not the origin vertex
if((vertex != null) && (vertex != mGraphModelManager.getModel().getNewEdgeOriginVertex()))
{
processEvent(kReleaseOnTerminus, vertex);
}
else
{
processEvent(kReleaseOnNothing, null);
}
}
}
@Override
public void mouseExited(MouseEvent me)
{
}
@Override
public void mouseDragged(MouseEvent me)
{
processEvent(kDrag, me.getPoint());
}
@Override
public void mouseMoved(MouseEvent me)
{
}
}
|
