J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996-2003 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.motif; |
| 27 | |
| 28 | import java.awt.*; |
| 29 | import java.awt.event.AdjustmentEvent; |
| 30 | import java.awt.peer.ScrollPanePeer; |
| 31 | |
| 32 | import java.util.logging.*; |
| 33 | |
| 34 | import sun.awt.PeerEvent; |
| 35 | |
| 36 | class MScrollPanePeer extends MPanelPeer implements ScrollPanePeer { |
| 37 | |
| 38 | private static final Logger log = Logger.getLogger("sun.awt.motif.MScrollPanePeer"); |
| 39 | |
| 40 | final static int UNIT_INCREMENT = 0; |
| 41 | final static int BLOCK_INCREMENT = 1; |
| 42 | |
| 43 | boolean ignore; |
| 44 | |
| 45 | native void create(MComponentPeer parent); |
| 46 | |
| 47 | static { |
| 48 | initIDs(); |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Initialize JNI field and method IDs |
| 53 | */ |
| 54 | private static native void initIDs(); |
| 55 | |
| 56 | MScrollPanePeer(Component target) { |
| 57 | init(target); |
| 58 | scrollPaneInit(); |
| 59 | } |
| 60 | |
| 61 | MScrollPanePeer(Component target, Object arg) { |
| 62 | init(target, arg); |
| 63 | scrollPaneInit(); |
| 64 | } |
| 65 | |
| 66 | void scrollPaneInit() { |
| 67 | ignore = false; |
| 68 | ScrollPane sp = (ScrollPane)target; |
| 69 | Adjustable vadj, hadj; |
| 70 | if ((vadj = sp.getVAdjustable()) != null) { |
| 71 | pSetIncrement(Adjustable.VERTICAL, UNIT_INCREMENT, vadj.getUnitIncrement()); |
| 72 | } |
| 73 | if ((hadj = sp.getHAdjustable()) != null) { |
| 74 | pSetIncrement(Adjustable.HORIZONTAL, UNIT_INCREMENT, hadj.getUnitIncrement()); |
| 75 | } |
| 76 | super.pSetScrollbarBackground(sp.getBackground()); |
| 77 | } |
| 78 | |
| 79 | public void setScrollChild(MComponentPeer child) { |
| 80 | pSetScrollChild(child); |
| 81 | } |
| 82 | |
| 83 | public void setBackground(Color c) { |
| 84 | super.setBackground(c); |
| 85 | pSetScrollbarBackground(c); |
| 86 | } |
| 87 | |
| 88 | public void setForeground(Color c) { |
| 89 | super.setForeground(c); |
| 90 | pSetInnerForeground(c); |
| 91 | } |
| 92 | |
| 93 | native void pSetScrollChild(MComponentPeer child); |
| 94 | native void pSetIncrement(int orient, int type, int incr); |
| 95 | native int pGetScrollbarSpace(int orient); |
| 96 | native int pGetBlockIncrement(int orient); |
| 97 | native Insets pInsets(int w, int h, int childw, int childh); |
| 98 | native int pGetShadow(); |
| 99 | |
| 100 | public int getHScrollbarHeight() { |
| 101 | ScrollPane sp = (ScrollPane)target; |
| 102 | if (sp.getScrollbarDisplayPolicy() == ScrollPane.SCROLLBARS_NEVER) { |
| 103 | return 0; |
| 104 | } else { |
| 105 | return pGetScrollbarSpace(Adjustable.HORIZONTAL); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | public int getVScrollbarWidth() { |
| 110 | ScrollPane sp = (ScrollPane)target; |
| 111 | if (sp.getScrollbarDisplayPolicy() == ScrollPane.SCROLLBARS_NEVER) { |
| 112 | return 0; |
| 113 | } else { |
| 114 | return pGetScrollbarSpace(Adjustable.VERTICAL); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | public Insets insets() { |
| 119 | ScrollPane sp = (ScrollPane)target; |
| 120 | Dimension d = sp.size(); |
| 121 | Dimension cd; |
| 122 | Component c = getScrollChild(); |
| 123 | if (c != null) { |
| 124 | cd = c.size(); |
| 125 | } else { |
| 126 | cd = new Dimension(0, 0); |
| 127 | } |
| 128 | return pInsets(d.width, d.height, cd.width, cd.height); |
| 129 | } |
| 130 | |
| 131 | public void setUnitIncrement(Adjustable adj, int u) { |
| 132 | ScrollPane sp = (ScrollPane)target; |
| 133 | if (sp.getScrollbarDisplayPolicy() != ScrollPane.SCROLLBARS_NEVER) { |
| 134 | pSetIncrement(adj.getOrientation(), UNIT_INCREMENT, u); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | public void setValue(Adjustable adj, int v) { |
| 139 | if (! ignore) { |
| 140 | Point p; |
| 141 | Component c = getScrollChild(); |
| 142 | if (c == null) { |
| 143 | return; |
| 144 | } |
| 145 | p = c.getLocation(); |
| 146 | switch(adj.getOrientation()) { |
| 147 | case Adjustable.VERTICAL: |
| 148 | setScrollPosition(-(p.x), v); |
| 149 | break; |
| 150 | case Adjustable.HORIZONTAL: |
| 151 | setScrollPosition(v, -(p.y)); |
| 152 | break; |
| 153 | } |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | public native void setScrollPosition(int x, int y); |
| 158 | |
| 159 | public void childResized(int w, int h) { |
| 160 | // REMIND AIM: May need to revisit this... |
| 161 | if (((ScrollPane)target).getScrollbarDisplayPolicy() != ScrollPane.SCROLLBARS_NEVER) { |
| 162 | ScrollPane sp = (ScrollPane)target; |
| 163 | Adjustable vAdj = sp.getVAdjustable(); |
| 164 | Adjustable hAdj = sp.getHAdjustable(); |
| 165 | pSetIncrement(Scrollbar.VERTICAL, UNIT_INCREMENT, vAdj.getUnitIncrement()); |
| 166 | pSetIncrement(Scrollbar.HORIZONTAL, UNIT_INCREMENT, hAdj.getUnitIncrement()); |
| 167 | pSetIncrement(Scrollbar.VERTICAL, BLOCK_INCREMENT, vAdj.getBlockIncrement()); |
| 168 | pSetIncrement(Scrollbar.HORIZONTAL, BLOCK_INCREMENT, hAdj.getBlockIncrement()); |
| 169 | } |
| 170 | |
| 171 | } |
| 172 | |
| 173 | // NOTE: This method may be called by privileged threads. |
| 174 | // DO NOT INVOKE CLIENT CODE ON THIS THREAD! |
| 175 | private void postScrollEvent(int orient, int type, |
| 176 | int pos, boolean isAdjusting) |
| 177 | { |
| 178 | Runnable adjustor = new Adjustor(orient, type, pos, isAdjusting); |
| 179 | MToolkit.executeOnEventHandlerThread(new ScrollEvent(target, adjustor)); |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * This is used to change the adjustable on dispatch thread to |
| 184 | * represent a change made in the native scrollbar. Since the |
| 185 | * change was reflected immediately at the native level, |
| 186 | * notification from the adjustable is temporarily ignored. |
| 187 | */ |
| 188 | class ScrollEvent extends PeerEvent { |
| 189 | ScrollEvent(Object source, Runnable runnable) { |
| 190 | super(source, runnable, 0L); |
| 191 | } |
| 192 | |
| 193 | public PeerEvent coalesceEvents(PeerEvent newEvent) { |
| 194 | if (log.isLoggable(Level.FINEST)) { |
| 195 | log.log(Level.FINEST, "ScrollEvent coalesced " + newEvent); |
| 196 | } |
| 197 | if (newEvent instanceof ScrollEvent) { |
| 198 | return newEvent; |
| 199 | } |
| 200 | return null; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | native void setTypedValue(ScrollPaneAdjustable adjustable, int value, int type); |
| 205 | |
| 206 | /** |
| 207 | * Runnable for the ScrollEvent that performs the adjustment. |
| 208 | */ |
| 209 | class Adjustor implements Runnable { |
| 210 | int orient; // selects scrollbar |
| 211 | int type; // adjustment type |
| 212 | int pos; // new position (only used for absolute) |
| 213 | boolean isAdjusting; // isAdjusting status |
| 214 | |
| 215 | Adjustor(int orient, int type, int pos, boolean isAdjusting) { |
| 216 | this.orient = orient; |
| 217 | this.type = type; |
| 218 | this.pos = pos; |
| 219 | this.isAdjusting = isAdjusting; |
| 220 | } |
| 221 | |
| 222 | public void run() { |
| 223 | ScrollPane sp = (ScrollPane)MScrollPanePeer.this.target; |
| 224 | ScrollPaneAdjustable adj = null; |
| 225 | |
| 226 | // ScrollPaneAdjustable made public in 1.4, but |
| 227 | // get[HV]Adjustable can't be declared to return |
| 228 | // ScrollPaneAdjustable because it would break backward |
| 229 | // compatibility -- hence the cast |
| 230 | |
| 231 | if (orient == Adjustable.VERTICAL) { |
| 232 | adj = (ScrollPaneAdjustable)sp.getVAdjustable(); |
| 233 | } else if (orient == Adjustable.HORIZONTAL) { |
| 234 | adj = (ScrollPaneAdjustable)sp.getHAdjustable(); |
| 235 | } else { |
| 236 | if (log.isLoggable(Level.FINE)) { |
| 237 | log.log(Level.FINE, "Assertion failed: unknown orient"); |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | if (adj == null) { |
| 242 | return; |
| 243 | } |
| 244 | |
| 245 | int newpos = adj.getValue(); |
| 246 | switch (type) { |
| 247 | case AdjustmentEvent.UNIT_DECREMENT: |
| 248 | newpos -= adj.getUnitIncrement(); |
| 249 | break; |
| 250 | case AdjustmentEvent.UNIT_INCREMENT: |
| 251 | newpos += adj.getUnitIncrement(); |
| 252 | break; |
| 253 | case AdjustmentEvent.BLOCK_DECREMENT: |
| 254 | newpos -= adj.getBlockIncrement(); |
| 255 | break; |
| 256 | case AdjustmentEvent.BLOCK_INCREMENT: |
| 257 | newpos += adj.getBlockIncrement(); |
| 258 | break; |
| 259 | case AdjustmentEvent.TRACK: |
| 260 | newpos = this.pos; |
| 261 | break; |
| 262 | default: |
| 263 | if (log.isLoggable(Level.FINE)) { |
| 264 | log.log(Level.FINE, "Assertion failed: unknown type"); |
| 265 | } |
| 266 | return; |
| 267 | } |
| 268 | |
| 269 | // keep scroll position in acceptable range |
| 270 | newpos = Math.max(adj.getMinimum(), newpos); |
| 271 | newpos = Math.min(adj.getMaximum(), newpos); |
| 272 | |
| 273 | // set value; this will synchronously fire an AdjustmentEvent |
| 274 | try { |
| 275 | MScrollPanePeer.this.ignore = true; |
| 276 | adj.setValueIsAdjusting(isAdjusting); |
| 277 | |
| 278 | // Fix for 4075484 - consider type information when creating AdjustmentEvent |
| 279 | // We can't just call adj.setValue() because it creates AdjustmentEvent with type=TRACK |
| 280 | // Instead, we call private method setTypedValue of ScrollPaneAdjustable. |
| 281 | // Because ScrollPaneAdjustable is in another package we should call it through native code. |
| 282 | setTypedValue(adj, newpos, type); |
| 283 | } finally { |
| 284 | MScrollPanePeer.this.ignore = false; |
| 285 | } |
| 286 | } |
| 287 | } // class Adjustor |
| 288 | |
| 289 | |
| 290 | private Component getScrollChild() { |
| 291 | ScrollPane sp = (ScrollPane)target; |
| 292 | Component child = null; |
| 293 | try { |
| 294 | child = sp.getComponent(0); |
| 295 | } catch (ArrayIndexOutOfBoundsException e) { |
| 296 | // do nothing. in this case we return null |
| 297 | } |
| 298 | return child; |
| 299 | } |
| 300 | |
| 301 | final static int MARGIN = 1; |
| 302 | final static int SCROLLBAR = 16; |
| 303 | int hsbSpace; |
| 304 | int vsbSpace; |
| 305 | int vval; |
| 306 | int hval; |
| 307 | int vmax; |
| 308 | int hmax; |
| 309 | /* |
| 310 | * Print the native component by rendering the Motif look ourselves. |
| 311 | * ToDo(aim): needs to query native motif for more accurate size and |
| 312 | * color information. |
| 313 | */ |
| 314 | public void print(Graphics g) { |
| 315 | ScrollPane sp = (ScrollPane)target; |
| 316 | Dimension d = sp.size(); |
| 317 | Color bg = sp.getBackground(); |
| 318 | Color fg = sp.getForeground(); |
| 319 | Point p = sp.getScrollPosition(); |
| 320 | Component c = getScrollChild(); |
| 321 | Dimension cd; |
| 322 | if (c != null) { |
| 323 | cd = c.size(); |
| 324 | } else { |
| 325 | cd = new Dimension(0, 0); |
| 326 | } |
| 327 | int sbDisplay = sp.getScrollbarDisplayPolicy(); |
| 328 | int vvis, hvis, vmin, hmin, vmax, hmax, vval, hval; |
| 329 | |
| 330 | switch (sbDisplay) { |
| 331 | case ScrollPane.SCROLLBARS_NEVER: |
| 332 | hsbSpace = vsbSpace = 0; |
| 333 | break; |
| 334 | case ScrollPane.SCROLLBARS_ALWAYS: |
| 335 | hsbSpace = vsbSpace = SCROLLBAR; |
| 336 | break; |
| 337 | case ScrollPane.SCROLLBARS_AS_NEEDED: |
| 338 | hsbSpace = (cd.width <= (d.width - 2*MARGIN)? 0 : SCROLLBAR); |
| 339 | vsbSpace = (cd.height <= (d.height - 2*MARGIN)? 0 : SCROLLBAR); |
| 340 | |
| 341 | if (hsbSpace == 0 && vsbSpace != 0) { |
| 342 | hsbSpace = (cd.width <= (d.width - SCROLLBAR - 2*MARGIN)? 0 : SCROLLBAR); |
| 343 | } |
| 344 | if (vsbSpace == 0 && hsbSpace != 0) { |
| 345 | vsbSpace = (cd.height <= (d.height - SCROLLBAR - 2*MARGIN)? 0 : SCROLLBAR); |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | vvis = hvis = vmin = hmin = vmax = hmax = vval = hval = 0; |
| 350 | |
| 351 | if (vsbSpace > 0) { |
| 352 | vmin = 0; |
| 353 | vvis = d.height - (2*MARGIN) - hsbSpace; |
| 354 | vmax = Math.max(cd.height - vvis, 0); |
| 355 | vval = p.y; |
| 356 | } |
| 357 | if (hsbSpace > 0) { |
| 358 | hmin = 0; |
| 359 | hvis = d.width - (2*MARGIN) - vsbSpace; |
| 360 | hmax = Math.max(cd.width - hvis, 0); |
| 361 | hval = p.x; |
| 362 | } |
| 363 | |
| 364 | // need to be careful to add the margins back in here because |
| 365 | // we're drawing the margin border, after all! |
| 366 | int w = d.width - vsbSpace; |
| 367 | int h = d.height - hsbSpace; |
| 368 | |
| 369 | g.setColor(bg); |
| 370 | g.fillRect(0, 0, d.width, d.height); |
| 371 | |
| 372 | if (hsbSpace > 0) { |
| 373 | int sbw = d.width - vsbSpace; |
| 374 | g.fillRect(1, d.height - SCROLLBAR - 3, sbw - 1, SCROLLBAR - 3); |
| 375 | Graphics ng = g.create(); |
| 376 | try { |
| 377 | ng.translate(0, d.height - (SCROLLBAR - 2)); |
| 378 | drawScrollbar(ng, bg, SCROLLBAR - 2, sbw, |
| 379 | hmin, hmax, hval, hvis, true); |
| 380 | } finally { |
| 381 | ng.dispose(); |
| 382 | } |
| 383 | } |
| 384 | if (vsbSpace > 0) { |
| 385 | int sbh = d.height - hsbSpace; |
| 386 | g.fillRect(d.width - SCROLLBAR - 3, 1, SCROLLBAR - 3, sbh - 1); |
| 387 | Graphics ng = g.create(); |
| 388 | try { |
| 389 | ng.translate(d.width - (SCROLLBAR - 2), 0); |
| 390 | drawScrollbar(ng, bg, SCROLLBAR - 2, sbh, |
| 391 | vmin, vmax, vval, vvis, false); |
| 392 | } finally { |
| 393 | ng.dispose(); |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | draw3DRect(g, bg, 0, 0, w - 1, h - 1, false); |
| 398 | |
| 399 | target.print(g); |
| 400 | sp.printComponents(g); |
| 401 | } |
| 402 | |
| 403 | /** |
| 404 | * @see ContainerPeer#restack |
| 405 | */ |
| 406 | public void restack() { |
| 407 | // Since ScrollPane can only have one child its restacking does nothing. |
| 408 | // Also, it is dangerous, since SP child is actually not a child of SP widget |
| 409 | // but the child of SP content widget. |
| 410 | } |
| 411 | } |