1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*******************************************************************************
* Copyright (c) 2007 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.utility.internal.swing;
import java.awt.Component;
import javax.swing.DefaultListCellRenderer;
import javax.swing.Icon;
import javax.swing.JList;
/**
* This renderer should behave the same as the DefaultListCellRenderer;
* but it slightly refactors the calculation of the icon and text of the list
* cell so that subclasses can easily override the methods that build
* the icon and text.
*
* In most cases, you need only override:
* #buildIcon(Object value)
* #buildText(Object value)
*/
public class SimpleListCellRenderer
extends DefaultListCellRenderer
{
/**
* Construct a simple renderer.
*/
public SimpleListCellRenderer() {
super();
}
@Override
public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
// substitute null for the cell value so nothing is drawn initially...
super.getListCellRendererComponent(list, null, index, isSelected, cellHasFocus);
this.setOpaque(true);
// ...then set the icon and text manually
this.setIcon(this.buildIcon(list, value, index, isSelected, cellHasFocus));
this.setText(this.buildText(list, value, index, isSelected, cellHasFocus));
this.setToolTipText(this.buildToolTipText(list, value, index, isSelected, cellHasFocus));
// the context will be initialized only if a reader is running
if (this.accessibleContext != null) {
this.accessibleContext.setAccessibleName(this.buildAccessibleName(list, value, index, isSelected, cellHasFocus));
}
return this;
}
/**
* Return the icon representation of the specified cell
* value and other settings. (Even more settings are
* accessible via inherited getters: hasFocus, isEnabled, etc.)
*/
protected Icon buildIcon(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
return this.buildIcon(value);
}
/**
* Return the icon representation of the specified cell
* value. The default is to display no icon at all unless the
* value itself is an icon.
*/
protected Icon buildIcon(Object value) {
// replicate the default behavior
return (value instanceof Icon) ? (Icon) value : null;
}
/**
* Return the textual representation of the specified cell
* value and other settings. (Even more settings are
* accessible via inherited getters: hasFocus, isEnabled, etc.)
*/
protected String buildText(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
return this.buildText(value);
}
/**
* Return the textual representation of the specified cell
* value. The default is to display the object's default string
* representation (as returned by #toString()); unless the
* value itself is an icon, in which case no text is displayed.
*/
protected String buildText(Object value) {
return (value instanceof Icon) ? "" : ((value == null) ? "" : value.toString());
}
/**
* Return the text displayed when the cursor lingers over the specified cell.
* (Even more settings are accessible via inherited getters: hasFocus, isEnabled, etc.)
*/
protected String buildToolTipText(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
return this.buildToolTipText(value);
}
/**
* Return the text displayed when the cursor lingers over the specified cell.
*/
protected String buildToolTipText(Object value) {
return null;
}
/**
* Return the accessible name to be given to the component used to render
* the given value and other settings. (Even more settings are accessible via
* inherited getters: hasFocus, isEnabled, etc.)
*/
protected String buildAccessibleName(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
return this.buildAccessibleName(value);
}
/**
* Return the accessible name to be given to the component used to render
* the given value.
*/
protected String buildAccessibleName(Object value) {
return null;
}
}
|
