summaryrefslogtreecommitdiff
path: root/libjava/classpath/javax/swing/plaf/metal/MetalComboBoxButton.java
blob: 8ec8bad72a1cb162d73c8c3b52f8d8b9bf2bdb5e (plain)
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
293
294
/* MetalComboBoxButton.java
   Copyright (C) 2005 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Classpath 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
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */


package javax.swing.plaf.metal;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Insets;

import javax.swing.CellRendererPane;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JList;
import javax.swing.ListCellRenderer;
import javax.swing.UIManager;

/**
 * A button used by the {@link MetalComboBoxUI} class.
 */
public class MetalComboBoxButton
  extends JButton
{

  /** A reference to the JComboBox that the button belongs to. */
  protected JComboBox comboBox;

  /** A reference to the JList. */
  protected JList listBox;

  /**
   * Used for rendering the selected item.
   */
  protected CellRendererPane rendererPane;

  /** The button icon. */
  protected Icon comboIcon;

  /** Display just the icon, or the icon plus the label. */
  protected boolean iconOnly;

  /**
   * Creates a new button.
   *
   * @param cb  the combo that the button is used for (<code>null</code> not
   *            permitted).
   * @param i  the icon displayed on the button.
   * @param pane  the rendering pane.
   * @param list  the list.
   */
  public MetalComboBoxButton(JComboBox cb, Icon i, CellRendererPane pane,
      JList list)
  {
    this(cb, i, cb.isEditable(), pane, list);
  }

  /**
   * Creates a new button.
   *
   * @param cb  the combo that the button is used for (<code>null</code> not
   *            permitted).
   * @param i  the icon displayed on the button.
   * @param onlyIcon  a flag that specifies whether the button displays only an
   *                  icon, or text as well.
   * @param pane  the rendering pane.
   * @param list  the list.
   */
  public MetalComboBoxButton(JComboBox cb, Icon i, boolean onlyIcon,
      CellRendererPane pane, JList list)
  {
    super();
    if (cb == null)
      throw new NullPointerException("Null 'cb' argument");
    comboBox = cb;
    comboIcon = i;
    iconOnly = onlyIcon;
    listBox = list;
    rendererPane = pane;
    setRolloverEnabled(false);
    setEnabled(comboBox.isEnabled());
    setFocusable(comboBox.isEnabled());
  }

  /**
   * Returns the combo box that the button is used with.
   *
   * @return The combo box.
   */
  public final JComboBox getComboBox()
  {
    return comboBox;
  }

  /**
   * Sets the combo box that the button is used with.
   *
   * @param cb  the combo box.
   */
  public final void setComboBox(JComboBox cb)
  {
    comboBox = cb;
  }

  /**
   * Returns the icon displayed by the button.  By default, this will be an
   * instance of {@link MetalComboBoxIcon}.
   *
   * @return The icon displayed by the button.
   */
  public final Icon getComboIcon()
  {
    return comboIcon;
  }

  /**
   * Sets the icon displayed by the button.
   *
   * @param i  the icon.
   */
  public final void setComboIcon(Icon i)
  {
    comboIcon = i;
  }

  /**
   * Returns a flag that controls whether the button displays an icon only,
   * or text as well.
   *
   * @return A boolean.
   */
  public final boolean isIconOnly()
  {
    return iconOnly;
  }

  /**
   * Sets the flag that controls whether the button displays an icon only,
   * or text as well.
   *
   * @param isIconOnly  the flag.
   */
  public final void setIconOnly(boolean isIconOnly)
  {
    iconOnly = isIconOnly;
  }

  /**
   * Returns <code>false</code>, to indicate that this component is not part
   * of the focus traversal group.
   *
   * @return <code>false</code>
   */
  public boolean isFocusTraversable()
  {
    return false;
  }

  /**
   * Enables or disables the button.
   *
   * @param enabled  the new status.
   */
  public void setEnabled(boolean enabled)
  {
    super.setEnabled(enabled);
    if (enabled)
      {
        setBackground(comboBox.getBackground());
        setForeground(comboBox.getForeground());
      }
    else
      {
        setBackground(UIManager.getColor("ComboBox.disabledBackground"));
        setForeground(UIManager.getColor("ComboBox.disabledForeground"));
      }
  }

  /**
   * Paints the component.
   *
   * @param g  the graphics device.
   */
  public void paintComponent(Graphics g)
  {
    super.paintComponent(g);
    Insets insets = this.getInsets();
    int w = getWidth() - (insets.left + insets.right);
    int h = getHeight() - (insets.top + insets.bottom);
    if (h > 0 && w > 0)
      {
        int x1 = insets.left;
        int y1 = insets.top;
        int x2 = x1 + (w - 1);
        int y2 = y1 + (h - 1);
        int iconWidth = 0;
        int iconX = x2;
        if (comboIcon != null)
          {
            iconWidth = comboIcon.getIconWidth();
            int iconHeight = comboIcon.getIconHeight();
            int iconY;
            if (iconOnly)
              {
                iconX = getWidth() / 2 - iconWidth / 2;
                iconY = getHeight() / 2 - iconHeight / 2;
              }
            else
              {
                iconX = x1 + (w - 1) - iconWidth;
                iconY = y1 + (y2 - y1) / 2 - iconHeight / 2;
              }
            comboIcon.paintIcon(this, g, iconX, iconY);
            if (this.hasFocus())
              {
                g.setColor(MetalLookAndFeel.getFocusColor());
                g.drawRect(x1 - 1, y1 - 1, w + 3, h + 1);
              }
          }
        if (! iconOnly && comboBox != null)
          {
            ListCellRenderer renderer = comboBox.getRenderer();
            boolean pressed = this.getModel().isPressed();
            Component comp = renderer.getListCellRendererComponent(listBox,
                comboBox.getSelectedItem(), -1, false, false);
            comp.setFont(rendererPane.getFont());

            if ((model.isArmed() && model.isPressed())
                || (comboBox.isFocusOwner() && !comboBox.isPopupVisible()))
              {
                if (isOpaque())
                  {
                    comp.setBackground(UIManager.getColor("Button.select"));
                    comp.setForeground(comboBox.getForeground());
                  }
              }
            else if (! comboBox.isEnabled())
              {
                if (this.isOpaque())
                  {
                    Color dbg =
                      UIManager.getColor("ComboBox.disabledBackground");
                    comp.setBackground(dbg);
                    Color dfg =
                      UIManager.getColor("ComboBox.disabledForeground");
                    comp.setForeground(dfg);
                  }
              }
            else
              {
                comp.setForeground(comboBox.getForeground());
                comp.setBackground(comboBox.getBackground());
              }
            int wr = w - (insets.right + iconWidth);
            rendererPane.paintComponent(g, comp, this, x1, y1, wr, h);
          }
      }
  }
}