J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2002-2003 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt.X11; |
| 27 | |
| 28 | import java.awt.*; |
| 29 | import java.awt.peer.*; |
| 30 | |
| 31 | class XLabelPeer extends XComponentPeer implements LabelPeer { |
| 32 | /** |
| 33 | * Create the label |
| 34 | */ |
| 35 | |
| 36 | static final int TEXT_XPAD = 8; |
| 37 | static final int TEXT_YPAD = 6; |
| 38 | String label; |
| 39 | int alignment; |
| 40 | |
| 41 | FontMetrics cachedFontMetrics; |
| 42 | Font oldfont; |
| 43 | |
| 44 | FontMetrics getFontMetrics() |
| 45 | { |
| 46 | if (cachedFontMetrics != null) |
| 47 | return cachedFontMetrics; |
| 48 | else return getFontMetrics(getPeerFont()); |
| 49 | |
| 50 | } |
| 51 | |
| 52 | void preInit(XCreateWindowParams params) { |
| 53 | super.preInit(params); |
| 54 | Label target = (Label) this.target; |
| 55 | label = target.getText(); |
| 56 | if (label == null) { |
| 57 | label = ""; |
| 58 | } |
| 59 | alignment = target.getAlignment(); |
| 60 | } |
| 61 | |
| 62 | XLabelPeer(Label target) { |
| 63 | super(target); |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Minimum size. |
| 68 | */ |
| 69 | public Dimension getMinimumSize() { |
| 70 | FontMetrics fm = getFontMetrics(); |
| 71 | int w; |
| 72 | try { |
| 73 | w = fm.stringWidth(label); |
| 74 | } |
| 75 | catch (NullPointerException e) { |
| 76 | w = 0; |
| 77 | } |
| 78 | return new Dimension(w + TEXT_XPAD, |
| 79 | fm.getAscent() + fm.getMaxDescent() + TEXT_YPAD); |
| 80 | } |
| 81 | |
| 82 | |
| 83 | /** |
| 84 | * Paint the label |
| 85 | */ |
| 86 | // NOTE: This method is called by privileged threads. |
| 87 | // DO NOT INVOKE CLIENT CODE ON THIS THREAD! |
| 88 | public void paint(Graphics g) { |
| 89 | int textX = 0; |
| 90 | int textY = 0; |
| 91 | g.setColor(getPeerBackground()); |
| 92 | g.fillRect(0, 0, width, height); |
| 93 | |
| 94 | Font f = getPeerFont(); |
| 95 | g.setFont(f); |
| 96 | FontMetrics fm = g.getFontMetrics(); |
| 97 | |
| 98 | if (cachedFontMetrics == null) |
| 99 | { |
| 100 | cachedFontMetrics = fm; |
| 101 | } |
| 102 | else |
| 103 | { |
| 104 | if (oldfont != f) |
| 105 | cachedFontMetrics = fm; |
| 106 | } |
| 107 | |
| 108 | switch (alignment) { |
| 109 | case Label.LEFT: |
| 110 | textX = 2; |
| 111 | textY = (height + fm.getMaxAscent() - fm.getMaxDescent()) / 2; |
| 112 | break; |
| 113 | case Label.RIGHT: |
| 114 | textX = width - (fm.stringWidth(label) + 2); |
| 115 | textY = (height + fm.getMaxAscent() - fm.getMaxDescent()) / 2; |
| 116 | break; |
| 117 | case Label.CENTER: |
| 118 | textX = (width - fm.stringWidth(label)) / 2; |
| 119 | textY = (height + fm.getMaxAscent() - fm.getMaxDescent()) / 2; |
| 120 | break; |
| 121 | } |
| 122 | if (isEnabled()) { |
| 123 | g.setColor(getPeerForeground()); |
| 124 | g.drawString(label, textX, textY); |
| 125 | } |
| 126 | else { |
| 127 | g.setColor(getPeerBackground().brighter()); |
| 128 | g.drawString(label, textX, textY); |
| 129 | g.setColor(getPeerBackground().darker()); |
| 130 | g.drawString(label, textX - 1, textY - 1); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | public void setText(String text) { |
| 135 | label = text; |
| 136 | if (label == null) { |
| 137 | label = ""; |
| 138 | } |
| 139 | repaint(); |
| 140 | } |
| 141 | public void setFont(Font f) { |
| 142 | super.setFont(f); |
| 143 | target.repaint(); |
| 144 | } |
| 145 | |
| 146 | public void setAlignment(int align) { |
| 147 | alignment = align; |
| 148 | repaint(); |
| 149 | } |
| 150 | } |