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7bde45b2 | 1 | /* ViewportLayout.java -- |
5c9092a7 | 2 | Copyright (C) 2002, 2004 Free Software Foundation, Inc. |
7bde45b2 BM |
3 | |
4 | This file is part of GNU Classpath. | |
5 | ||
6 | GNU Classpath is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Classpath is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Classpath; see the file COPYING. If not, write to the | |
18 | Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. | |
20 | ||
21 | Linking this library statically or dynamically with other modules is | |
22 | making a combined work based on this library. Thus, the terms and | |
23 | conditions of the GNU General Public License cover the whole | |
24 | combination. | |
25 | ||
26 | As a special exception, the copyright holders of this library give you | |
27 | permission to link this library with independent modules to produce an | |
28 | executable, regardless of the license terms of these independent | |
29 | modules, and to copy and distribute the resulting executable under | |
30 | terms of your choice, provided that you also meet, for each linked | |
31 | independent module, the terms and conditions of the license of that | |
32 | module. An independent module is a module which is not derived from | |
33 | or based on this library. If you modify this library, you may extend | |
34 | this exception to your version of the library, but you are not | |
35 | obligated to do so. If you do not wish to do so, delete this | |
36 | exception statement from your version. */ | |
37 | ||
38 | package javax.swing; | |
39 | ||
5c9092a7 MK |
40 | import java.awt.Component; |
41 | import java.awt.Container; | |
42 | import java.awt.Dimension; | |
43 | import java.awt.LayoutManager; | |
c5d2de6b GH |
44 | import java.awt.Point; |
45 | import java.awt.Rectangle; | |
5c9092a7 | 46 | import java.io.Serializable; |
7bde45b2 BM |
47 | |
48 | /** | |
49 | * ViewportLayout | |
50 | * @author Andrew Selkirk | |
c5d2de6b | 51 | * @author Graydon Hoare |
7bde45b2 | 52 | */ |
2ce0d0b0 MK |
53 | public class ViewportLayout implements LayoutManager, Serializable |
54 | { | |
55 | static final long serialVersionUID = -788225906076097229L; | |
7bde45b2 | 56 | |
c5d2de6b GH |
57 | public ViewportLayout() |
58 | { | |
59 | } | |
60 | public void addLayoutComponent(String name, Component c) | |
61 | { | |
62 | } | |
63 | public void removeLayoutComponent(Component c) | |
64 | { | |
65 | } | |
66 | public Dimension preferredLayoutSize(Container parent) | |
67 | { | |
68 | JViewport vp = (JViewport)parent; | |
69 | Component view = vp.getView(); | |
70 | if (view instanceof Scrollable) | |
71 | { | |
72 | Scrollable sc = (Scrollable) view; | |
73 | Dimension d = sc.getPreferredScrollableViewportSize(); | |
74 | // System.err.println(this + ".preferredLayoutSize() : scrollable -> " + d); | |
75 | return d; | |
76 | } | |
77 | else | |
78 | return view.getPreferredSize(); | |
79 | } | |
80 | public Dimension minimumLayoutSize(Container parent) | |
81 | { | |
82 | JViewport vp = (JViewport)parent; | |
83 | Component view = vp.getView(); | |
84 | return view.getMinimumSize(); | |
85 | } | |
86 | public void layoutContainer(Container parent) | |
87 | { | |
88 | JViewport vp = (JViewport)parent; | |
89 | Component view = vp.getView(); | |
90 | Rectangle portBounds = vp.getBounds(); | |
91 | Dimension viewMinimum = view.getMinimumSize(); | |
92 | int width = Math.max(portBounds.width, | |
93 | viewMinimum.width); | |
94 | int height = Math.max(portBounds.height, | |
95 | viewMinimum.height); | |
96 | int x = Math.min(0, portBounds.width - width); | |
97 | int y = Math.min(0, portBounds.height - height); | |
98 | // System.err.println(this + ".layoutContainer() : width = " + width + ", height = " + height); | |
99 | vp.setViewPosition(new Point(x, y)); | |
100 | vp.setViewSize(new Dimension(width, height)); | |
101 | } | |
86881a7b | 102 | } |