WFLine


1   /******************************************************************************
2    * The contents of this file are subject to the   Compiere License  Version 1.1
3    * ("License"); You may not use this file except in compliance with the License
4    * You may obtain a copy of the License at http://www.compiere.org/license.html
5    * Software distributed under the License is distributed on an  "AS IS"  basis,
6    * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
7    * the specific language governing rights and limitations under the License.
8    * The Original Code is                  Compiere  ERP & CRM  Business Solution
9    * The Initial Developer of the Original Code is Jorg Janke  and ComPiere, Inc.
10   * Portions created by Jorg Janke are Copyright (C) 1999-2002 Jorg Janke, parts
11   * created by ComPiere are Copyright (C) ComPiere, Inc.;   All Rights Reserved.
12   * Contributor(s): ______________________________________.
13   *****************************************************************************/
14  package org.compiere.apps.wf;
15  
16  import java.awt.*;
17  import javax.swing.*;
18  
19  import org.compiere.model.*;
20  
21  
22  /**
23   *  Work Flow Line between Nodes
24   *
25   *  @author     Jorg Janke
26   *  @version    $Id: WFLine.java,v 1.3 2002/12/05 05:42:03 jjanke Exp $
27   */
28  public class WFLine extends JComponent
29  {
30      /**
31       *  Create Line
32       *  @param next model
33       */
34      public WFLine (MWFNodeNext next)
35      {
36          m_next = next;
37          setOpaque(true);
38      }   //  WFLine
39  
40      /** Model                   */
41      private MWFNodeNext     m_next = null;
42  
43      /** From Node               */
44      private Rectangle       m_from = null;
45      /** To Node                 */
46      private Rectangle       m_to = null;
47  
48      /**
49       *  Get From
50       *  @return from node
51       */
52      public Rectangle getFrom()
53      {
54          return m_from;
55      }   //  getFrom
56  
57      /**
58       *  Set From
59       *  @param from from node
60       */
61      public void setFrom(Rectangle from)
62      {
63          m_from = from;
64      }   //  setFrom
65  
66      /**
67       *  Get To
68       *  @return to node
69       */
70      public Rectangle getTo()
71      {
72          return m_to;
73      }   //  getTo
74  
75      /**
76       *  Set To
77       *  @param to to node
78       */
79      public void setTo(Rectangle to)
80      {
81          m_to = to;
82      }   //  setTo
83  
84      /**
85       *  Get From Node ID
86       *  @return from node id
87       */
88      public int getAD_WF_Node_ID()
89      {
90          return m_next.getAD_WF_Node_ID();
91      }   //  getAD_WF_Node_ID
92  
93      /**
94       *  Get To Node ID
95       *  @return to node id
96       */
97      public int getAD_WF_Next_ID()
98      {
99          return m_next.getAD_WF_Next_ID();
100     }   //  getAD_WF_Next_ID
101 
102     /*************************************************************************/
103 
104     /**
105      *  Paint it
106      *  @param g Graph
107      */
108     protected void paintComponent (Graphics g)
109     {
110         if (m_from == null || m_to == null)
111             return;
112 
113         Polygon arrow = new Polygon();
114         //  left \ down
115         if (m_from.x+m_from.width <= m_to.x
116             && m_from.y+m_from.height  <= m_to.y)
117         {
118             addPoint (arrow, m_from, SwingConstants.RIGHT, true);
119             addPoint (arrow, m_to, SwingConstants.TOP, false);
120         }
121         //  top | down
122         else if (m_from.y+m_from.height <= m_to.y)
123         {
124             addPoint (arrow, m_from, SwingConstants.BOTTOM, true);
125             addPoint (arrow, m_to, SwingConstants.TOP, false);
126         }
127         //  bottom / up
128         else if (m_to.y+m_to.height <= m_from.y)
129         {
130             addPoint (arrow, m_from, SwingConstants.TOP, true);
131             addPoint (arrow, m_to, SwingConstants.BOTTOM, false);
132         }
133         //  right o <- o left
134         else if (m_to.x+m_to.width <= m_from.x)
135         {
136             addPoint (arrow, m_from, SwingConstants.LEFT, true);
137             addPoint (arrow, m_to, SwingConstants.RIGHT, false);
138         }
139         //  left o -> o right
140         else // if (isL_R())
141         {
142             addPoint (arrow, m_from, SwingConstants.RIGHT, true);
143             addPoint (arrow, m_to, SwingConstants.LEFT, false);
144         }
145 
146         //  Paint it
147         g.setColor(Color.cyan);
148         g.fillPolygon(arrow);
149         g.setColor(Color.blue);
150         g.drawPolygon(arrow);
151     }   //  paintComponent
152 
153 
154     /**
155      *  Get Point of Rectangle
156      *  @param arrow Polygon to draw arrow
157      *  @param rect Rectangle
158      *  @param pos SwingConstants.BOTTOM / TOP / RIGHT / LEFT
159      *  @param from if true from (base) else to (tip) of arrow
160      */
161     private void addPoint (Polygon arrow, Rectangle rect, int pos, boolean from)
162     {
163         int x = rect.x;
164         int y = rect.y;
165 
166         if (pos == SwingConstants.TOP)
167         {
168             x += rect.width/2;
169             if (from)
170             {
171                 arrow.addPoint(x-2, y);
172                 arrow.addPoint(x+2, y);
173             }
174             else
175                 arrow.addPoint(x, y);
176         }
177         else if (pos == SwingConstants.RIGHT)
178         {
179             x += rect.width;
180             y += rect.height/2;
181             if (from)
182             {
183                 arrow.addPoint(x, y-2);
184                 arrow.addPoint(x, y+2);
185             }
186             else
187                 arrow.addPoint(x, y);
188         }
189         else if (pos == SwingConstants.LEFT)
190         {
191             y += rect.height/2;
192             if (from)
193             {
194                 arrow.addPoint(x, y-2);
195                 arrow.addPoint(x, y+2);
196             }
197             else
198                 arrow.addPoint(x, y);
199         }
200         else // if (pos == SwingConstants.BOTTOM)
201         {
202             x += rect.width/2;
203             y += rect.height;
204             if (from)
205             {
206                 arrow.addPoint(x-2, y);
207                 arrow.addPoint(x+2, y);
208             }
209             else
210                 arrow.addPoint(x, y);
211         }
212     }   //  getPoint
213 
214     /**
215      *  Get Preferred Size
216      *  @return size
217      */
218     public Dimension getPreferredSize()
219     {
220         if (m_from == null || m_to == null)
221             return super.getPreferredSize();
222         //
223         int width = Math.max(m_from.x + m_from.width, m_to.x + m_to.width);
224         int height = Math.max(m_from.y + m_from.height, m_to.y + m_to.height);
225         //
226         return new Dimension(width, height);
227     }   //  getPreferredSize
228 
229     /**
230      *  String Representation
231      *  @return info
232      */
233     public String   toString()
234     {
235         StringBuffer   sb = new StringBuffer  ("WFLine[");
236         sb.append(getAD_WF_Node_ID()).append("->").append(getAD_WF_Next_ID());
237         sb.append("]");
238         return sb.toString();
239     }   //  toString
240 
241 }   //  WFLine
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