ViewHelper


1   /*
2    * (c) Rob Gordon 2005
3    */
4   package org.oddjob.designer.view;
5   
6   import java.awt.Component  ;
7   import java.awt.Dialog  ;
8   import java.awt.Frame  ;
9   import java.awt.HeadlessException  ;
10  import java.awt.Window  ;
11  import java.awt.event.ActionEvent  ;
12  
13  import javax.swing.AbstractAction  ;
14  import javax.swing.Action  ;
15  import javax.swing.JButton  ;
16  import javax.swing.JPopupMenu  ;
17  import javax.swing.SwingUtilities  ;
18  
19  import org.oddjob.designer.Looks;
20  import org.oddjob.designer.model.ComponentAction;
21  import org.oddjob.designer.model.DesignDefinition;
22  
23  /**
24   * Utility methods for Swing Views.
25   */
26  public class ViewHelper {
27  
28      /**
29       * Create a standard detail button for a DesignDefinition.
30       * 
31       * @param def The DesignDefinition.
32       * 
33       * @return A button.
34       */
35      public static Component   createDetailButton(final DesignDefinition def) {
36          final JButton   button = new JButton  ();
37          button.setAction(new AbstractAction  ("Edit") {
38              /*
39               * (non-Javadoc)
40               * 
41               * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
42               */
43              public void actionPerformed(ActionEvent   e) {
44                  Window   w = SwingUtilities.windowForComponent(button);
45                  Component   form = ViewFactory.create(def).dialog();
46  
47                  ValueDialog valueDialog = null;
48                  if (w == null) {
49                      valueDialog = new ValueDialog(form);
50                  }
51                  else {
52                      if (w instanceof Frame  ) {
53                          valueDialog = new ValueDialog((Frame  ) w, form);
54                      } else {
55                          valueDialog = new ValueDialog((Dialog  ) w, form);
56                      }                   
57                  }
58                  valueDialog.pack();
59                  valueDialog.setVisible(true);
60              }
61          });
62          return button;
63      }
64      
65      /**
66       * Pad the lable of a field.
67       * 
68       * @param title The text.
69       * @return Padded text.
70       */
71      public static String   padLabel(String   title) {
72          StringBuffer   paddedTitle = new StringBuffer  ();
73          paddedTitle.append(title);
74          for (int i = title.length(); i < Looks.LABEL_SIZE; ++i) {
75              paddedTitle.append(' ');
76          }
77          return paddedTitle.toString();
78      }
79      
80      /**
81       * Convert a ComponentAction into a Swing Action.
82       * 
83       * @param from The ComponentAction
84       * @return the Swing Action.
85       */
86      public static Action   convert(final ComponentAction from) {
87          return new AbstractAction  (from.getName()) {
88              public void actionPerformed(ActionEvent   e) {
89                  from.perform();
90              }
91          };
92      }
93      
94      /**
95       * Convert an Array of ComponentActions into an Array of 
96       * Swing Actions.
97       * 
98       * @param froms The ComponentActions
99       * @return The SwingActions
100      */
101     public static Action  [] convertAll(ComponentAction[] froms) {
102         Action  [] actions = new Action  [froms.length];
103         for (int i = 0; i < actions.length; ++i) {
104             actions[i] = convert(froms[i]);
105         }
106         return actions;
107     }
108 
109     /**
110      * Utility method to get the parent window for a component. Required for
111      * dialogs.
112      *  
113      * @param parentComponent The component who's window were finding.
114      * 
115      * @return The wondow.
116      * @throws HeadlessException If the component has no window.
117      */
118     public static Window   getWindowForComponent(Component   parentComponent)
119     throws HeadlessException   {
120         if (parentComponent == null)
121             return null;
122         if (parentComponent instanceof Frame   || parentComponent instanceof Dialog  )
123             return (Window  )parentComponent;
124         if (parentComponent instanceof JPopupMenu  ) {
125             // a popup doesn't have a parent!!
126             return ViewHelper.getWindowForComponent(
127                     ((JPopupMenu  ) parentComponent).getInvoker());
128         }
129         return ViewHelper.getWindowForComponent(parentComponent.getParent());
130     }
131 }
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