/
IconBorder.java
292 lines (269 loc) · 9.39 KB
/
IconBorder.java
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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
/*
* $Id: IconBorder.java 2528 2007-12-14 13:49:37Z stolis $
*
* Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.hdesktop.swingx.border;
import java.awt.Component;
import java.awt.ComponentOrientation;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Rectangle;
import java.io.Serializable;
import javax.swing.Icon;
import javax.swing.SwingConstants;
import javax.swing.border.Border;
import org.hdesktop.swingx.icon.EmptyIcon;
/**
* {@code IconBorder} creates a border that places an {@code Icon} in the border
* on the horizontal axis. The border does not add any additional insets other
* than the inset required to produce the space for the icon. If additional
* insets are required, users should create a
* {@link javax.swing.border.CompoundBorder compund border}.
* <p>
* This border is useful when attempting to add {@code Icon}s to pre-existing
* components without requiring specialty painting.
*
* @author Amy Fowler
* @author Karl Schaefer
*
* @version 1.1
*/
public class IconBorder implements Border, Serializable {
/**
* An empty icon.
*/
public static final Icon EMPTY_ICON = new EmptyIcon();
private int padding;
private Icon icon;
private int iconPosition;
private Rectangle iconBounds = new Rectangle();
/**
* Creates an {@code IconBorder} with an empty icon in a trailing position
* with a padding of 4.
*
* @see #EMPTY_ICON
*/
public IconBorder() {
this(null);
}
/**
* Creates an {@code IconBorder} with the specified icon in a trailing
* position with a padding of 4.
*
* @param validIcon
* the icon to set. This may be {@code null} to represent an
* empty icon.
* @see #EMPTY_ICON
*/
public IconBorder(Icon validIcon) {
this(validIcon, SwingConstants.TRAILING);
}
/**
* Creates an {@code IconBorder} with the specified constraints and a
* padding of 4.
*
* @param validIcon
* the icon to set. This may be {@code null} to represent an
* empty icon.
* @param iconPosition
* the position to place the icon relative to the component
* contents. This must be one of the following
* {@code SwingConstants}:
* <ul>
* <li>{@code LEADING}</li>
* <li>{@code TRAILING}</li>
* <li>{@code EAST}</li>
* <li>{@code WEST}</li>
* </ul>
* @throws IllegalArgumentException
* if {@code iconPosition} is not a valid position.
* @see #EMPTY_ICON
*/
public IconBorder(Icon validIcon, int iconPosition) {
this(validIcon, iconPosition, 4);
}
/**
* Creates an {@code IconBorder} with the specified constraints. If
* {@code validIcon} is {@code null}, {@code EMPTY_ICON} is used instead.
* If {@code padding} is negative, then the border does not use padding.
*
* @param validIcon
* the icon to set. This may be {@code null} to represent an
* empty icon.
* @param iconPosition
* the position to place the icon relative to the component
* contents. This must be one of the following
* {@code SwingConstants}:
* <ul>
* <li>{@code LEADING}</li>
* <li>{@code TRAILING}</li>
* <li>{@code EAST}</li>
* <li>{@code WEST}</li>
* </ul>
* @param padding
* the padding to surround the icon with. All non-positive values
* set the padding to 0.
* @throws IllegalArgumentException
* if {@code iconPosition} is not a valid position.
* @see #EMPTY_ICON
*/
public IconBorder(Icon validIcon, int iconPosition, int padding) {
setIcon(validIcon);
setPadding(padding);
setIconPosition(iconPosition);
}
private boolean isValidPosition(int position) {
boolean result = false;
switch (position) {
case SwingConstants.LEADING:
case SwingConstants.TRAILING:
case SwingConstants.EAST:
case SwingConstants.WEST:
result = true;
break;
default:
result = false;
}
return result;
}
/**
* {@inheritDoc}
*/
public Insets getBorderInsets(Component c) {
int horizontalInset = icon.getIconWidth() + (2 * padding);
int iconPosition = bidiDecodeLeadingTrailing(c.getComponentOrientation(), this.iconPosition);
if (iconPosition == SwingConstants.EAST) {
return new Insets(0, 0, 0, horizontalInset);
}
return new Insets(0, horizontalInset, 0, 0);
}
/**
* Sets the icon for this border.
*
* @param validIcon
* the icon to set. This may be {@code null} to represent an
* empty icon.
* @see #EMPTY_ICON
*/
public void setIcon(Icon validIcon) {
this.icon = validIcon == null ? EMPTY_ICON : validIcon;
}
/**
* This border is not opaque.
*
* @return always returns {@code false}
*/
public boolean isBorderOpaque() {
return false;
}
/**
* {@inheritDoc}
*/
public void paintBorder(Component c, Graphics g, int x, int y, int width,
int height) {
int iconPosition = bidiDecodeLeadingTrailing(c.getComponentOrientation(), this.iconPosition);
if (iconPosition == SwingConstants.NORTH_EAST) {
iconBounds.y = y + padding;
iconBounds.x = x + width - padding - icon.getIconWidth();
} else if (iconPosition == SwingConstants.EAST) { // EAST
iconBounds.y = y
+ ((height - icon.getIconHeight()) / 2);
iconBounds.x = x + width - padding - icon.getIconWidth();
} else if (iconPosition == SwingConstants.WEST) {
iconBounds.y = y
+ ((height - icon.getIconHeight()) / 2);
iconBounds.x = x + padding;
}
iconBounds.width = icon.getIconWidth();
iconBounds.height = icon.getIconHeight();
icon.paintIcon(c, g, iconBounds.x, iconBounds.y);
}
/**
* Returns EAST or WEST depending on the ComponentOrientation and
* the given postion LEADING/TRAILING this method has no effect for other
* position values
*/
private int bidiDecodeLeadingTrailing(ComponentOrientation c, int position) {
if(position == SwingConstants.TRAILING) {
if(!c.isLeftToRight()) {
return SwingConstants.WEST;
}
return SwingConstants.EAST;
}
if(position == SwingConstants.LEADING) {
if(c.isLeftToRight()) {
return SwingConstants.WEST;
}
return SwingConstants.EAST;
}
return position;
}
/**
* Gets the padding surrounding the icon.
*
* @return the padding for the icon. This value is guaranteed to be
* nonnegative.
*/
public int getPadding() {
return padding;
}
/**
* Sets the padding around the icon.
*
* @param padding
* the padding to set. If {@code padding < 0}, then
* {@code padding} will be set to {@code 0}.
*/
public void setPadding(int padding) {
this.padding = padding < 0 ? 0 : padding;
}
/**
* Returns the position to place the icon (relative to the component contents).
*
* @return one of the following {@code SwingConstants}:
* <ul>
* <li>{@code LEADING}</li>
* <li>{@code TRAILING}</li>
* <li>{@code EAST}</li>
* <li>{@code WEST}</li>
* </ul>
*/
public int getIconPosition() {
return iconPosition;
}
/**
* Sets the position to place the icon (relative to the component contents).
*
* @param iconPosition must be one of the following {@code SwingConstants}:
* <ul>
* <li>{@code LEADING}</li>
* <li>{@code TRAILING}</li>
* <li>{@code EAST}</li>
* <li>{@code WEST}</li>
* </ul>
* @throws IllegalArgumentException
* if {@code iconPosition} is not a valid position.
*/
public void setIconPosition(int iconPosition) {
if (!isValidPosition(iconPosition)) {
throw new IllegalArgumentException("Invalid icon position");
}
this.iconPosition = iconPosition;
}
}