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Java > Open Source Codes > javax > swing > plaf > synth > SynthScrollPaneUI


1 /*
2  * @(#)SynthScrollPaneUI.java 1.12 03/12/19
3  *
4  * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6  */

7
8 package javax.swing.plaf.synth;
9
10 import javax.swing.*;
11 import javax.swing.event.*;
12 import javax.swing.border.*;
13 import javax.swing.plaf.*;
14 import javax.swing.plaf.basic.*;
15
16 import java.beans.PropertyChangeListener JavaDoc;
17 import java.beans.PropertyChangeEvent JavaDoc;
18
19 import java.awt.*;
20 import java.awt.event.*;
21 import sun.swing.plaf.synth.SynthUI;
22
23
24 /**
25  * Synth's ScrollPaneUI.
26  *
27  * @version 1.12, 12/19/03
28  * @author Scott Violet
29  */

30 class SynthScrollPaneUI extends BasicScrollPaneUI implements
31                  PropertyChangeListener JavaDoc, SynthUI {
32     private SynthStyle JavaDoc style;
33
34     public static ComponentUI createUI(JComponent x) {
35     return new SynthScrollPaneUI JavaDoc();
36     }
37
38     public void update(Graphics g, JComponent c) {
39         SynthContext JavaDoc context = getContext(c);
40
41         SynthLookAndFeel.update(context, g);
42         context.getPainter().paintScrollPaneBackground(context,
43                           g, 0, 0, c.getWidth(), c.getHeight());
44         paint(context, g);
45         context.dispose();
46     }
47
48     public void paint(Graphics g, JComponent c) {
49         SynthContext JavaDoc context = getContext(c);
50
51         paint(context, g);
52         context.dispose();
53     }
54
55     protected void paint(SynthContext JavaDoc context, Graphics g) {
56     Border vpBorder = scrollpane.getViewportBorder();
57     if (vpBorder != null) {
58         Rectangle r = scrollpane.getViewportBorderBounds();
59         vpBorder.paintBorder(scrollpane, g, r.x, r.y, r.width, r.height);
60     }
61     }
62
63
64     public void paintBorder(SynthContext JavaDoc context, Graphics g, int x,
65                             int y, int w, int h) {
66         context.getPainter().paintScrollPaneBorder(context, g, x, y, w, h);
67     }
68
69     protected void installDefaults(JScrollPane scrollpane) {
70         updateStyle(scrollpane);
71     }
72
73     private void updateStyle(JScrollPane c) {
74         SynthContext JavaDoc context = getContext(c, ENABLED);
75         SynthStyle JavaDoc oldStyle = style;
76
77         style = SynthLookAndFeel.updateStyle(context, this);
78         if (style != oldStyle) {
79             Border vpBorder = scrollpane.getViewportBorder();
80             if ((vpBorder == null) ||( vpBorder instanceof UIResource)) {
81                 scrollpane.setViewportBorder(new ViewportBorder(context));
82             }
83             if (oldStyle != null) {
84                 uninstallKeyboardActions(c);
85                 installKeyboardActions(c);
86             }
87         }
88         context.dispose();
89     }
90
91
92     protected void installListeners(JScrollPane c) {
93         super.installListeners(c);
94         c.addPropertyChangeListener(this);
95     }
96
97     protected void uninstallDefaults(JScrollPane c) {
98         SynthContext JavaDoc context = getContext(c, ENABLED);
99
100         style.uninstallDefaults(context);
101         context.dispose();
102
103         if (scrollpane.getViewportBorder() instanceof UIResource) {
104             scrollpane.setViewportBorder(null);
105         }
106     }
107
108
109     protected void uninstallListeners(JComponent c) {
110         super.uninstallListeners(c);
111         c.removePropertyChangeListener(this);
112     }
113
114
115     public SynthContext JavaDoc getContext(JComponent c) {
116         return getContext(c, getComponentState(c));
117     }
118
119     private SynthContext JavaDoc getContext(JComponent c, int state) {
120         return SynthContext.getContext(SynthContext JavaDoc.class, c,
121                     SynthLookAndFeel.getRegion(c), style, state);
122     }
123
124
125     private Region JavaDoc getRegion(JComponent c) {
126         return SynthLookAndFeel.getRegion(c);
127     }
128
129
130     private int getComponentState(JComponent c) {
131         return SynthLookAndFeel.getComponentState(c);
132     }
133
134     public void propertyChange(PropertyChangeEvent JavaDoc e) {
135         if (SynthLookAndFeel.shouldUpdateStyle(e)) {
136             updateStyle(scrollpane);
137         }
138     }
139
140
141
142     private class ViewportBorder extends AbstractBorder implements UIResource {
143         private Insets insets;
144
145         ViewportBorder(SynthContext JavaDoc context) {
146             this.insets = (Insets)context.getStyle().get(context,
147                                             "ScrollPane.viewportBorderInsets");
148             if (this.insets == null) {
149                 this.insets = SynthLookAndFeel.EMPTY_UIRESOURCE_INSETS;
150             }
151         }
152
153         public void paintBorder(Component c, Graphics g, int x, int y,
154                             int width, int height) {
155             JComponent jc = (JComponent)c;
156             SynthContext JavaDoc context = getContext(jc);
157             SynthStyle JavaDoc style = context.getStyle();
158             if (style == null) {
159                 assert false: "SynthBorder is being used outside after the " +
160                               " UI has been uninstalled";
161                 return;
162             }
163             context.getPainter().paintViewportBorder(context, g, x, y, width,
164                                                      height);
165             context.dispose();
166         }
167
168         public Insets getBorderInsets(Component c) {
169             return getBorderInsets(c, null);
170         }
171
172         public Insets getBorderInsets(Component c, Insets insets) {
173             if (insets == null) {
174                 return new Insets(this.insets.top, this.insets.left,
175                                   this.insets.bottom, this.insets.right);
176             }
177             insets.top = this.insets.top;
178             insets.bottom = this.insets.bottom;
179             insets.left = this.insets.left;
180             insets.right = this.insets.left;
181             return insets;
182         }
183
184         public boolean isBorderOpaque() {
185             return false;
186         }
187     }
188 }
189
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