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1 package gnu.kawa.models;
2 import java.awt.Dimension  ;
3 import java.awt.geom.Dimension2D ;
4 import gnu.mapping.ThreadLocation;
5
6
11
12 public abstract class Display
13 {
14 public static ThreadLocation myDisplay = new ThreadLocation("my-display");
15
16 public static Display getInstance ()
17 {
18 Object d = myDisplay.get(null);
19 if (d instanceof Display)
20 return (Display) d;
21 String name = d == null ? "swing" : d.toString();
22 Class [] noClasses = new Class [0];
23 for (;;)
24 {
25 int comma = name.indexOf(',');
26 String rest = null;
27 if (comma >= 0)
28 {
29 rest = name.substring(comma+1);
30 name = name.substring(0, comma);
31 }
32
33 if (name.equals("swing"))
34 name = "gnu.kawa.swingviews.SwingDisplay";
35 else if (name.equals("swt"))
36 name = "gnu.kawa.swtviews.SwtDisplay";
37 else if (name.equals("echo2"))
38 name = "gnu.kawa.echo2.Echo2Display";
39
40 try
41 {
42 Class clas = Class.forName(name);
43 java.lang.reflect.Method method
44 = clas.getDeclaredMethod("getInstance", noClasses);
45 return (Display) method.invoke(null, new Object [0]);
46 }
47 catch (ClassNotFoundException ex)
48 {
49 if (rest == null)
50 throw new RuntimeException ("no display toolkit: "+d);
51 name = rest;
52 }
53 catch (Throwable ex)
54 {
55 throw gnu.mapping.WrappedException.wrapIfNeeded(ex);
56 }
57 }
58 }
59
60 public abstract Window makeWindow ();
61
62 public abstract void addButton (Button model, Object where);
63
64 public abstract void addLabel (Label model, Object where);
65
66 public abstract void addImage (DrawImage model, Object where);
67
68 public void addText (Text model, Object where)
69 {
70 throw new Error ("makeView called on DrawImage");
71 }
72
73 public void addSpacer (Spacer model, Object where)
74 {
75 throw new Error ("makeView called on Spacer");
76 }
77
78 public abstract void addBox (Box model, Object where);
79
80 public abstract void addView (Object view, Object where);
81
82 public static Dimension asDimension (Dimension2D dim)
83 {
84 if (dim instanceof Dimension || dim == null)
85 return (Dimension ) dim;
86 else
87 return new Dimension ((int) (dim.getWidth() + 0.5),
88 (int) (dim.getHeight() + 0.5));
89 }
90
91 public Model coerceToModel (Object component)
92 {
93 if (component instanceof gnu.lists.FString || component instanceof String )
94 return new Label(component.toString());
95 return (Model) component;
96 }
97 }
98 |
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