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| 1 | /* | ||
| 2 | * Copyright (c) 2000, 2008, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * 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(int x1, int y1, int x2, int y2, | ||
| 259 | BufferCapabilities.FlipContents flipAction) | ||
| 260 | { | ||
| 261 | throw new IllegalStateException( | ||
| 262 | "Page-flipping is not allowed on a lightweight component"); | ||
| 263 | } | ||
| 264 | public void destroyBuffers() { | ||
| 265 | } | ||
| 266 | |||
| 267 | /** | ||
| 268 | * @see java.awt.peer.ComponentPeer#isReparentSupported | ||
| 269 | */ | ||
| 270 | public boolean isReparentSupported() { | ||
| 271 | return false; | ||
| 272 | } | ||
| 273 | |||
| 274 | /** | ||
| 275 | * @see java.awt.peer.ComponentPeer#reparent | ||
| 276 | */ | ||
| 277 | public void reparent(ContainerPeer newNativeParent) { | ||
| 278 | throw new UnsupportedOperationException(); | ||
| 279 | } | ||
| 280 | |||
| 281 | public void layout() { | ||
| 282 | } | ||
| 283 | |||
| 284 | public Rectangle getBounds() { | ||
| 285 | return new Rectangle(0, 0, 0, 0); | ||
| 286 | } | ||
| 287 | |||
| 288 | |||
| 289 | /** | ||
| 290 | * Applies the shape to the native component window. | ||
| 291 | * @since 1.7 | ||
| 292 | */ | ||
| 293 | public void applyShape(Region shape) { | ||
| 294 | } | ||
| 295 | |||
| 296 | /** | ||
| 297 | * Lowers this component at the bottom of the above HW peer. If the above parameter | ||
| 298 | * is null then the method places this component at the top of the Z-order. | ||
| 299 | */ | ||
| 300 | public void setZOrder(ComponentPeer above) { | ||
| 301 | } | ||
| 302 | |||
| 303 | public boolean updateGraphicsData(GraphicsConfiguration gc) { | ||
| 304 | return false; | ||
| 305 | } | ||
| 306 | |||
| 307 | public GraphicsConfiguration getAppropriateGraphicsConfiguration( | ||
| 308 | GraphicsConfiguration gc) | ||
| 309 | { | ||
| 310 | return gc; | ||
| 311 | } | ||
| 312 | } | ||