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13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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25 
26 package javax.swing.plaf.synth;
27 
28 import java.awt.*;
29 import java.beans.*;
30 import javax.swing.*;
31 import javax.swing.plaf.*;
32 import javax.swing.plaf.basic.*;
33 import sun.swing.DefaultLookup;
34 
35 /**
36  * Provides the Synth L&F UI delegate for
37  * {@link javax.swing.JOptionPane}.
38  *
39  * @author James Gosling
40  * @author Scott Violet
41  * @author Amy Fowler
42  * @since 1.7
43  */
44 public class SynthOptionPaneUI extends BasicOptionPaneUI implements
45                                 PropertyChangeListener, SynthUI {
46     private SynthStyle style;
47 
48     /**
49      * Creates a new UI object for the given component.
50      *
51      * @param x component to create UI object for
52      * @return the UI object
53      */
createUI(JComponent x)54     public static ComponentUI createUI(JComponent x) {
55         return new SynthOptionPaneUI();
56     }
57 
58     /**
59      * {@inheritDoc}
60      */
61     @Override
installDefaults()62     protected void installDefaults() {
63         updateStyle(optionPane);
64     }
65 
66     /**
67      * {@inheritDoc}
68      */
69     @Override
installListeners()70     protected void installListeners() {
71         super.installListeners();
72         optionPane.addPropertyChangeListener(this);
73     }
74 
updateStyle(JComponent c)75     private void updateStyle(JComponent c) {
76         SynthContext context = getContext(c, ENABLED);
77         SynthStyle oldStyle = style;
78 
79         style = SynthLookAndFeel.updateStyle(context, this);
80         if (style != oldStyle) {
81             minimumSize = (Dimension)style.get(context,
82                                                "OptionPane.minimumSize");
83             if (minimumSize == null) {
84                 minimumSize = new Dimension(262, 90);
85             }
86             if (oldStyle != null) {
87                 uninstallKeyboardActions();
88                 installKeyboardActions();
89             }
90         }
91     }
92 
93     /**
94      * {@inheritDoc}
95      */
96     @Override
uninstallDefaults()97     protected void uninstallDefaults() {
98         SynthContext context = getContext(optionPane, ENABLED);
99 
100         style.uninstallDefaults(context);
101         style = null;
102     }
103 
104     /**
105      * {@inheritDoc}
106      */
107     @Override
uninstallListeners()108     protected void uninstallListeners() {
109         super.uninstallListeners();
110         optionPane.removePropertyChangeListener(this);
111     }
112 
113     /**
114      * {@inheritDoc}
115      */
116     @Override
installComponents()117     protected void installComponents() {
118         optionPane.add(createMessageArea());
119 
120         Container separator = createSeparator();
121         if (separator != null) {
122             optionPane.add(separator);
123             SynthContext context = getContext(optionPane, ENABLED);
124             optionPane.add(Box.createVerticalStrut(context.getStyle().
125                        getInt(context, "OptionPane.separatorPadding", 6)));
126         }
127         optionPane.add(createButtonArea());
128         optionPane.applyComponentOrientation(optionPane.getComponentOrientation());
129     }
130 
131     /**
132      * {@inheritDoc}
133      */
134     @Override
getContext(JComponent c)135     public SynthContext getContext(JComponent c) {
136         return getContext(c, getComponentState(c));
137     }
138 
getContext(JComponent c, int state)139     private SynthContext getContext(JComponent c, int state) {
140         return SynthContext.getContext(c, style, state);
141     }
142 
getComponentState(JComponent c)143     private int getComponentState(JComponent c) {
144         return SynthLookAndFeel.getComponentState(c);
145     }
146 
147     /**
148      * Notifies this UI delegate to repaint the specified component.
149      * This method paints the component background, then calls
150      * the {@link #paint(SynthContext,Graphics)} method.
151      *
152      * <p>In general, this method does not need to be overridden by subclasses.
153      * All Look and Feel rendering code should reside in the {@code paint} method.
154      *
155      * @param g the {@code Graphics} object used for painting
156      * @param c the component being painted
157      * @see #paint(SynthContext,Graphics)
158      */
159     @Override
update(Graphics g, JComponent c)160     public void update(Graphics g, JComponent c) {
161         SynthContext context = getContext(c);
162 
163         SynthLookAndFeel.update(context, g);
164         context.getPainter().paintOptionPaneBackground(context,
165                           g, 0, 0, c.getWidth(), c.getHeight());
166         paint(context, g);
167     }
168 
169     /**
170      * Paints the specified component according to the Look and Feel.
171      * <p>This method is not used by Synth Look and Feel.
172      * Painting is handled by the {@link #paint(SynthContext,Graphics)} method.
173      *
174      * @param g the {@code Graphics} object used for painting
175      * @param c the component being painted
176      * @see #paint(SynthContext,Graphics)
177      */
178     @Override
paint(Graphics g, JComponent c)179     public void paint(Graphics g, JComponent c) {
180         SynthContext context = getContext(c);
181 
182         paint(context, g);
183     }
184 
185     /**
186      * Paints the specified component. This implementation does nothing.
187      *
188      * @param context context for the component being painted
189      * @param g the {@code Graphics} object used for painting
190      * @see #update(Graphics,JComponent)
191      */
paint(SynthContext context, Graphics g)192     protected void paint(SynthContext context, Graphics g) {
193     }
194 
195     /**
196      * {@inheritDoc}
197      */
198     @Override
paintBorder(SynthContext context, Graphics g, int x, int y, int w, int h)199     public void paintBorder(SynthContext context, Graphics g, int x,
200                             int y, int w, int h) {
201         context.getPainter().paintOptionPaneBorder(context, g, x, y, w, h);
202     }
203 
204     /**
205      * {@inheritDoc}
206      */
207     @Override
propertyChange(PropertyChangeEvent e)208     public void propertyChange(PropertyChangeEvent e) {
209         if (SynthLookAndFeel.shouldUpdateStyle(e)) {
210             updateStyle((JOptionPane)e.getSource());
211         }
212     }
213 
214     /**
215      * {@inheritDoc}
216      */
217     @Override
getSizeButtonsToSameWidth()218     protected boolean getSizeButtonsToSameWidth() {
219         return DefaultLookup.getBoolean(optionPane, this,
220                                         "OptionPane.sameSizeButtons", true);
221     }
222 
223     /**
224      * Called from {@link #installComponents} to create a {@code Container}
225      * containing the body of the message. The icon is the created by calling
226      * {@link #addIcon}.
227      */
228     @Override
createMessageArea()229     protected Container createMessageArea() {
230         JPanel top = new JPanel();
231         top.setName("OptionPane.messageArea");
232         top.setLayout(new BorderLayout());
233 
234         /* Fill the body. */
235         Container          body = new JPanel(new GridBagLayout());
236         Container          realBody = new JPanel(new BorderLayout());
237 
238         body.setName("OptionPane.body");
239         realBody.setName("OptionPane.realBody");
240 
241         if (getIcon() != null) {
242             JPanel sep = new JPanel();
243             sep.setName("OptionPane.separator");
244             sep.setPreferredSize(new Dimension(15, 1));
245             realBody.add(sep, BorderLayout.BEFORE_LINE_BEGINS);
246         }
247         realBody.add(body, BorderLayout.CENTER);
248 
249         GridBagConstraints cons = new GridBagConstraints();
250         cons.gridx = cons.gridy = 0;
251         cons.gridwidth = GridBagConstraints.REMAINDER;
252         cons.gridheight = 1;
253 
254         SynthContext context = getContext(optionPane, ENABLED);
255         cons.anchor = context.getStyle().getInt(context,
256                       "OptionPane.messageAnchor", GridBagConstraints.CENTER);
257 
258         cons.insets = new Insets(0,0,3,0);
259 
260         addMessageComponents(body, cons, getMessage(),
261                           getMaxCharactersPerLineCount(), false);
262         top.add(realBody, BorderLayout.CENTER);
263 
264         addIcon(top);
265         return top;
266     }
267 
268     /**
269      * {@inheritDoc}
270      */
271     @Override
createSeparator()272     protected Container createSeparator() {
273         JSeparator separator = new JSeparator(SwingConstants.HORIZONTAL);
274 
275         separator.setName("OptionPane.separator");
276         return separator;
277     }
278 }
279