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1 package org.enhydra.tool.swing.layout;
2
3 import java.awt.Component  ;
4 import java.awt.Container ;
5 import java.awt.Dimension ;
6 import java.awt.Insets ;
7 import java.awt.LayoutManager2 ;
8 import java.awt.Rectangle ;
9 import java.io.Serializable ;
10 import java.util.Hashtable ;
11
12
13
14 public class XYLayout
15 implements LayoutManager2 , Serializable
16 {
17
18 private static final long serialVersionUID = 200L;
19 int width;
20 int height;
21 Hashtable info;
22 static final XYConstraints defaultConstraints = new XYConstraints();
23
24 public XYLayout()
25 {
26 info = new Hashtable ();
27 }
28
29 public XYLayout(int width, int height)
30 {
31 info = new Hashtable ();
32 this.width = width;
33 this.height = height;
34 }
35
36 public int getWidth()
37 {
38 return width;
39 }
40
41 public void setWidth(int width)
42 {
43 this.width = width;
44 }
45
46 public int getHeight()
47 {
48 return height;
49 }
50
51 public void setHeight(int height)
52 {
53 this.height = height;
54 }
55
56 public String toString()
57 {
58 return String.valueOf(String.valueOf((new StringBuffer ("XYLayout[width=")).append(width).append(",height=").append(height).append("]")));
59 }
60
61 public void addLayoutComponent(String s, Component component1)
62 {
63 }
64
65 public void removeLayoutComponent(Component component)
66 {
67 info.remove(component);
68 }
69
70 public Dimension preferredLayoutSize(Container target)
71 {
72 return getLayoutSize(target, true);
73 }
74
75 public Dimension minimumLayoutSize(Container target)
76 {
77 return getLayoutSize(target, false);
78 }
79
80 public void layoutContainer(Container target)
81 {
82 Insets insets = target.getInsets();
83 int count = target.getComponentCount();
84 for(int i = 0; i < count; i++)
85 {
86 Component component = target.getComponent(i);
87 if(component.isVisible())
88 {
89 Rectangle r = getComponentBounds(component, true);
90 component.setBounds(insets.left + r.x, insets.top + r.y, r.width, r.height);
91 }
92 }
93
94 }
95
96 public void addLayoutComponent(Component component, Object constraints)
97 {
98 if(constraints instanceof XYConstraints)
99 info.put(component, constraints);
100 }
101
102 public Dimension maximumLayoutSize(Container target)
103 {
104 return new Dimension (0x7fffffff, 0x7fffffff);
105 }
106
107 public float getLayoutAlignmentX(Container target)
108 {
109 return 0.5F;
110 }
111
112 public float getLayoutAlignmentY(Container target)
113 {
114 return 0.5F;
115 }
116
117 public void invalidateLayout(Container container)
118 {
119 }
120
121 Rectangle getComponentBounds(Component component, boolean doPreferred)
122 {
123 XYConstraints constraints = (XYConstraints)info.get(component);
124 if(constraints == null)
125 constraints = defaultConstraints;
126 Rectangle r = new Rectangle (constraints.x, constraints.y, constraints.width, constraints.height);
127 if(r.width <= 0 || r.height <= 0)
128 {
129 Dimension d = doPreferred ? component.getPreferredSize() : component.getMinimumSize();
130 if(r.width <= 0)
131 r.width = d.width;
132 if(r.height <= 0)
133 r.height = d.height;
134 }
135 return r;
136 }
137
138 Dimension getLayoutSize(Container target, boolean doPreferred)
139 {
140 Dimension dim = new Dimension (0, 0);
141 if(width <= 0 || height <= 0)
142 {
143 int count = target.getComponentCount();
144 for(int i = 0; i < count; i++)
145 {
146 Component component = target.getComponent(i);
147 if(component.isVisible())
148 {
149 Rectangle r = getComponentBounds(component, doPreferred);
150 dim.width = Math.max(dim.width, r.x + r.width);
151 dim.height = Math.max(dim.height, r.y + r.height);
152 }
153 }
154
155 }
156 if(width > 0)
157 dim.width = width;
158 if(height > 0)
159 dim.height = height;
160 Insets insets = target.getInsets();
161 dim.width += insets.left + insets.right;
162 dim.height += insets.top + insets.bottom;
163 return dim;
164 }
165
166 }
167 |
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