1 /* |
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2 * CDDL HEADER START |
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3 * |
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4 * The contents of this file are subject to the terms of the |
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5 * Common Development and Distribution License (the "License"). |
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6 * You may not use this file except in compliance with the License. |
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7 * |
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8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
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9 * or http://www.opensolaris.org/os/licensing. |
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10 * See the License for the specific language governing permissions |
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11 * and limitations under the License. |
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12 * |
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13 * When distributing Covered Code, include this CDDL HEADER in each |
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14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
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15 * If applicable, add the following below this CDDL HEADER, with the |
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16 * fields enclosed by brackets "[]" replaced with your own identifying |
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17 * information: Portions Copyright [yyyy] [name of copyright owner] |
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18 * |
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19 * CDDL HEADER END |
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20 */ |
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21 |
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22 /* |
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23 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. |
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24 */ |
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25 |
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26 package com.oracle.solaris.vp.util.swing; |
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27 |
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28 import java.awt.*; |
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29 import java.util.NoSuchElementException; |
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30 import javax.swing.JPanel; |
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31 import com.oracle.solaris.vp.util.misc.*; |
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32 |
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33 @SuppressWarnings({"serial"}) |
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34 public class ReplacingStackPanel extends JPanel implements Stackable<Component> |
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35 { |
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36 // |
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37 // Instance data |
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38 // |
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39 |
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40 private StackList<Component> components = new StackList<Component>(); |
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41 |
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42 // |
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43 // Constructors |
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44 // |
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45 |
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46 public ReplacingStackPanel() { |
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47 super(new BorderLayout()); |
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48 setOpaque(false); |
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49 } |
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50 |
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51 // |
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52 // Stackable methods |
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53 // |
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54 |
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55 /** |
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56 * Removes all components from this {@code ReplacingStackPanel}. |
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57 */ |
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58 @Override |
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59 public void clear() { |
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60 components.clear(); |
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61 removeAll(); |
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62 } |
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63 |
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64 @Override |
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65 public int getCount() { |
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66 return components.getCount(); |
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67 } |
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68 |
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69 /** |
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70 * Returns the top-most {@code Component} from this {@code |
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71 * ReplacingStackPanel}, or {@code null} if there are no {@code Component}s |
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72 * in this {@code ReplacingStackPanel} |
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73 */ |
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74 @Override |
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75 public Component peek() { |
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76 try { |
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77 return peekOrErr(); |
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78 } catch (NoSuchElementException e) { |
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79 return null; |
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80 } |
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81 } |
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82 |
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83 /** |
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84 * Returns the top-most {@code Component} from this {@code |
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85 * ReplacingStackPanel}. |
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86 * |
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87 * @exception NoSuchElementException |
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88 * if there are no {@code Component}s in this {@code |
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89 * ReplacingStackPanel} |
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90 */ |
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91 @Override |
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92 public Component peekOrErr() { |
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93 return components.peekOrErr(); |
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94 } |
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95 |
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96 @Override |
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97 public Component peekOrErr(int n) { |
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98 return components.peekOrErr(n); |
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99 } |
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100 |
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101 /** |
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102 * Removes the top-most {@code Component} from this {@code |
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103 * ReplacingStackPanel}. |
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104 * |
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105 * @return the removed {@code Component} |
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106 * |
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107 * @exception NoSuchElementException |
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108 * if there are no {@code Component}s in this {@code |
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109 * ReplacingStackPanel} |
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110 */ |
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111 @Override |
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112 public Component pop() { |
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113 Component c = components.pop(); |
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114 removeAll(); |
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115 |
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116 try { |
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117 add(peekOrErr(), BorderLayout.CENTER); |
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118 } catch (NoSuchElementException ignore) { |
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119 } |
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120 |
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121 revalidate(); |
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122 repaint(); |
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123 |
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124 return c; |
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125 } |
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126 |
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127 /** |
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128 * Adds the given {@code Component} to the top of the {@code Component} |
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129 * stack. |
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130 */ |
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131 @Override |
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132 public void push(Component c) { |
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133 removeAll(); |
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134 add(c, BorderLayout.CENTER); |
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135 components.push(c); |
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136 revalidate(); |
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137 repaint(); |
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138 } |
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139 } |
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