J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2007 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; |
| 27 | |
| 28 | import java.awt.AWTException; |
| 29 | import java.awt.BufferCapabilities; |
| 30 | import java.awt.Color; |
| 31 | import java.awt.Component; |
| 32 | import java.awt.Cursor; |
| 33 | import java.awt.Dimension; |
| 34 | import java.awt.Font; |
| 35 | import java.awt.FontMetrics; |
| 36 | import java.awt.Graphics; |
| 37 | import java.awt.GraphicsConfiguration; |
| 38 | import java.awt.Image; |
| 39 | import java.awt.Insets; |
| 40 | import java.awt.MenuBar; |
| 41 | import java.awt.Point; |
| 42 | import java.awt.Event; |
| 43 | import java.awt.event.PaintEvent; |
| 44 | import java.awt.image.ColorModel; |
| 45 | import java.awt.image.ImageObserver; |
| 46 | import java.awt.image.ImageProducer; |
| 47 | import java.awt.image.VolatileImage; |
| 48 | import java.awt.peer.CanvasPeer; |
| 49 | import java.awt.peer.LightweightPeer; |
| 50 | import java.awt.peer.PanelPeer; |
| 51 | import java.awt.peer.ComponentPeer; |
| 52 | import java.awt.peer.ContainerPeer; |
| 53 | import java.awt.Rectangle; |
| 54 | import sun.java2d.pipe.Region; |
| 55 | |
| 56 | |
| 57 | /** |
| 58 | * Implements the LightweightPeer interface for use in lightweight components |
| 59 | * that have no native window associated with them. This gets created by |
| 60 | * default in Component so that Component and Container can be directly |
| 61 | * extended to create useful components written entirely in java. These |
| 62 | * components must be hosted somewhere higher up in the component tree by a |
| 63 | * native container (such as a Frame). |
| 64 | * |
| 65 | * This implementation provides no useful semantics and serves only as a |
| 66 | * marker. One could provide alternative implementations in java that do |
| 67 | * something useful for some of the other peer interfaces to minimize the |
| 68 | * native code. |
| 69 | * |
| 70 | * This was renamed from java.awt.LightweightPeer (a horrible and confusing |
| 71 | * name) and moved from java.awt.Toolkit into sun.awt as a public class in |
| 72 | * its own file. |
| 73 | * |
| 74 | * @author Timothy Prinzing |
| 75 | * @author Michael Martak |
| 76 | */ |
| 77 | |
| 78 | public class NullComponentPeer implements LightweightPeer, |
| 79 | CanvasPeer, PanelPeer { |
| 80 | |
| 81 | public boolean isObscured() { |
| 82 | return false; |
| 83 | } |
| 84 | |
| 85 | public boolean canDetermineObscurity() { |
| 86 | return false; |
| 87 | } |
| 88 | |
| 89 | public boolean isFocusable() { |
| 90 | return false; |
| 91 | } |
| 92 | |
| 93 | public void setVisible(boolean b) { |
| 94 | } |
| 95 | |
| 96 | public void show() { |
| 97 | } |
| 98 | |
| 99 | public void hide() { |
| 100 | } |
| 101 | |
| 102 | public void setEnabled(boolean b) { |
| 103 | } |
| 104 | |
| 105 | public void enable() { |
| 106 | } |
| 107 | |
| 108 | public void disable() { |
| 109 | } |
| 110 | |
| 111 | public void paint(Graphics g) { |
| 112 | } |
| 113 | |
| 114 | public void repaint(long tm, int x, int y, int width, int height) { |
| 115 | } |
| 116 | |
| 117 | public void print(Graphics g) { |
| 118 | } |
| 119 | |
| 120 | public void setBounds(int x, int y, int width, int height, int op) { |
| 121 | } |
| 122 | |
| 123 | public void reshape(int x, int y, int width, int height) { |
| 124 | } |
| 125 | |
| 126 | public void coalescePaintEvent(PaintEvent e) { |
| 127 | } |
| 128 | |
| 129 | public boolean handleEvent(Event e) { |
| 130 | return false; |
| 131 | } |
| 132 | |
| 133 | public void handleEvent(java.awt.AWTEvent arg0) { |
| 134 | } |
| 135 | |
| 136 | public Dimension getPreferredSize() { |
| 137 | return new Dimension(1,1); |
| 138 | } |
| 139 | |
| 140 | public Dimension getMinimumSize() { |
| 141 | return new Dimension(1,1); |
| 142 | } |
| 143 | |
| 144 | public java.awt.Toolkit getToolkit() { |
| 145 | return null; |
| 146 | } |
| 147 | |
| 148 | public ColorModel getColorModel() { |
| 149 | return null; |
| 150 | } |
| 151 | |
| 152 | public Graphics getGraphics() { |
| 153 | return null; |
| 154 | } |
| 155 | |
| 156 | public GraphicsConfiguration getGraphicsConfiguration() { |
| 157 | return null; |
| 158 | } |
| 159 | |
| 160 | public FontMetrics getFontMetrics(Font font) { |
| 161 | return null; |
| 162 | } |
| 163 | |
| 164 | public void dispose() { |
| 165 | // no native code |
| 166 | } |
| 167 | |
| 168 | public void setForeground(Color c) { |
| 169 | } |
| 170 | |
| 171 | public void setBackground(Color c) { |
| 172 | } |
| 173 | |
| 174 | public void setFont(Font f) { |
| 175 | } |
| 176 | |
| 177 | public void updateCursorImmediately() { |
| 178 | } |
| 179 | |
| 180 | public void setCursor(Cursor cursor) { |
| 181 | } |
| 182 | |
| 183 | public boolean requestFocus |
| 184 | (Component lightweightChild, boolean temporary, |
| 185 | boolean focusedWindowChangeAllowed, long time, CausedFocusEvent.Cause cause) { |
| 186 | return false; |
| 187 | } |
| 188 | |
| 189 | public Image createImage(ImageProducer producer) { |
| 190 | return null; |
| 191 | } |
| 192 | |
| 193 | public Image createImage(int width, int height) { |
| 194 | return null; |
| 195 | } |
| 196 | |
| 197 | public boolean prepareImage(Image img, int w, int h, ImageObserver o) { |
| 198 | return false; |
| 199 | } |
| 200 | |
| 201 | public int checkImage(Image img, int w, int h, ImageObserver o) { |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | public Dimension preferredSize() { |
| 206 | return getPreferredSize(); |
| 207 | } |
| 208 | |
| 209 | public Dimension minimumSize() { |
| 210 | return getMinimumSize(); |
| 211 | } |
| 212 | |
| 213 | public Point getLocationOnScreen() { |
| 214 | return new Point(0,0); |
| 215 | } |
| 216 | |
| 217 | public Insets getInsets() { |
| 218 | return insets(); |
| 219 | } |
| 220 | |
| 221 | public void beginValidate() { |
| 222 | } |
| 223 | |
| 224 | public void endValidate() { |
| 225 | } |
| 226 | |
| 227 | public Insets insets() { |
| 228 | return new Insets(0, 0, 0, 0); |
| 229 | } |
| 230 | |
| 231 | public boolean isPaintPending() { |
| 232 | return false; |
| 233 | } |
| 234 | |
| 235 | public boolean handlesWheelScrolling() { |
| 236 | return false; |
| 237 | } |
| 238 | |
| 239 | public VolatileImage createVolatileImage(int width, int height) { |
| 240 | return null; |
| 241 | } |
| 242 | |
| 243 | public void beginLayout() { |
| 244 | } |
| 245 | |
| 246 | public void endLayout() { |
| 247 | } |
| 248 | |
| 249 | public void createBuffers(int numBuffers, BufferCapabilities caps) |
| 250 | throws AWTException { |
| 251 | throw new AWTException( |
| 252 | "Page-flipping is not allowed on a lightweight component"); |
| 253 | } |
| 254 | public Image getBackBuffer() { |
| 255 | throw new IllegalStateException( |
| 256 | "Page-flipping is not allowed on a lightweight component"); |
| 257 | } |
| 258 | public void flip(BufferCapabilities.FlipContents flipAction) { |
| 259 | throw new IllegalStateException( |
| 260 | "Page-flipping is not allowed on a lightweight component"); |
| 261 | } |
| 262 | public void destroyBuffers() { |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * @see java.awt.peer.ComponentPeer#isReparentSupported |
| 267 | */ |
| 268 | public boolean isReparentSupported() { |
| 269 | return false; |
| 270 | } |
| 271 | |
| 272 | /** |
| 273 | * @see java.awt.peer.ComponentPeer#reparent |
| 274 | */ |
| 275 | public void reparent(ContainerPeer newNativeParent) { |
| 276 | throw new UnsupportedOperationException(); |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * @see java.awt.peer.ContainerPeer#restack |
| 281 | */ |
| 282 | public void restack() { |
| 283 | throw new UnsupportedOperationException(); |
| 284 | } |
| 285 | |
| 286 | /** |
| 287 | * @see java.awt.peer.ContainerPeer#isRestackSupported |
| 288 | */ |
| 289 | public boolean isRestackSupported() { |
| 290 | return false; |
| 291 | } |
| 292 | public void layout() { |
| 293 | } |
| 294 | |
| 295 | public Rectangle getBounds() { |
| 296 | return new Rectangle(0, 0, 0, 0); |
| 297 | } |
| 298 | |
| 299 | |
| 300 | /** |
| 301 | * Applies the shape to the native component window. |
| 302 | * @since 1.7 |
| 303 | */ |
| 304 | public void applyShape(Region shape) { |
| 305 | } |
| 306 | } |