|
1
23 package org.enhydra.kelp.common.dods;
24
25 import java.awt.*;
26 import java.io.Serializable  ;
27 import java.util.Hashtable ;
28
29
30
31 public class XYLayout
32 implements LayoutManager2, Serializable
33 {
34
35 private static final long serialVersionUID = 200L;
36 int width;
37 int height;
38 Hashtable info;
39 static final XYConstraints defaultConstraints = new XYConstraints();
40
41 public XYLayout()
42 {
43 info = new Hashtable ();
44 }
45
46 public XYLayout(int width, int height)
47 {
48 info = new Hashtable ();
49 this.width = width;
50 this.height = height;
51 }
52
53 public int getWidth()
54 {
55 return width;
56 }
57
58 public void setWidth(int width)
59 {
60 this.width = width;
61 }
62
63 public int getHeight()
64 {
65 return height;
66 }
67
68 public void setHeight(int height)
69 {
70 this.height = height;
71 }
72
73 public String toString()
74 {
75 return String.valueOf(String.valueOf((new StringBuffer ("XYLayout[width=")).append(width).append(",height=").append(height).append("]")));
76 }
77
78 public void addLayoutComponent(String s, Component component1)
79 {
80 }
81
82 public void removeLayoutComponent(Component component)
83 {
84 info.remove(component);
85 }
86
87 public Dimension preferredLayoutSize(Container target)
88 {
89 return getLayoutSize(target, true);
90 }
91
92 public Dimension minimumLayoutSize(Container target)
93 {
94 return getLayoutSize(target, false);
95 }
96
97 public void layoutContainer(Container target)
98 {
99 Insets insets = target.getInsets();
100 int count = target.getComponentCount();
101 for(int i = 0; i < count; i++)
102 {
103 Component component = target.getComponent(i);
104 if(component.isVisible())
105 {
106 Rectangle r = getComponentBounds(component, true);
107 component.setBounds(insets.left + r.x, insets.top + r.y, r.width, r.height);
108 }
109 }
110
111 }
112
113 public void addLayoutComponent(Component component, Object constraints)
114 {
115 if(constraints instanceof XYConstraints)
116 info.put(component, constraints);
117 }
118
119 public Dimension maximumLayoutSize(Container target)
120 {
121 return new Dimension(0x7fffffff, 0x7fffffff);
122 }
123
124 public float getLayoutAlignmentX(Container target)
125 {
126 return 0.5F;
127 }
128
129 public float getLayoutAlignmentY(Container target)
130 {
131 return 0.5F;
132 }
133
134 public void invalidateLayout(Container container)
135 {
136 }
137
138 Rectangle getComponentBounds(Component component, boolean doPreferred)
139 {
140 XYConstraints constraints = (XYConstraints)info.get(component);
141 if(constraints == null)
142 constraints = defaultConstraints;
143 Rectangle r = new Rectangle(constraints.x, constraints.y, constraints.width, constraints.height);
144 if(r.width <= 0 || r.height <= 0)
145 {
146 Dimension d = doPreferred ? component.getPreferredSize() : component.getMinimumSize();
147 if(r.width <= 0)
148 r.width = d.width;
149 if(r.height <= 0)
150 r.height = d.height;
151 }
152 return r;
153 }
154
155 Dimension getLayoutSize(Container target, boolean doPreferred)
156 {
157 Dimension dim = new Dimension(0, 0);
158 if(width <= 0 || height <= 0)
159 {
160 int count = target.getComponentCount();
161 for(int i = 0; i < count; i++)
162 {
163 Component component = target.getComponent(i);
164 if(component.isVisible())
165 {
166 Rectangle r = getComponentBounds(component, doPreferred);
167 dim.width = Math.max(dim.width, r.x + r.width);
168 dim.height = Math.max(dim.height, r.y + r.height);
169 }
170 }
171
172 }
173 if(width > 0)
174 dim.width = width;
175 if(height > 0)
176 dim.height = height;
177 Insets insets = target.getInsets();
178 dim.width += insets.left + insets.right;
179 dim.height += insets.top + insets.bottom;
180 return dim;
181 }
182
183 }
184 |
Popular Tags |
Java API By Example, From Geeks To Geeks.