litesoft
@ 948
litesoft / trunk / GWT_Sandbox / UIdesign / src / com / test / uidesign / client / AccordionVerticalPairPanel.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 |
package com.test.uidesign.client; import org.litesoft.GWT.client.widgets.*; import com.google.gwt.animation.client.*; import com.google.gwt.dom.client.*; import com.google.gwt.user.client.ui.*; import java.util.*; public class AccordionVerticalPairPanel extends Composite { public static class WidgetPair { private Widget mPrime, mSubordinate; private boolean mShowing; private PairPanel mPairPanel; public WidgetPair( Widget pPrime, Widget pSubordinate ) { mPrime = pPrime; mSubordinate = pSubordinate; } public Widget getPrime() { return mPrime; } public Widget getSubordinate() { return mSubordinate; } public boolean isSubordinateShowing() { if ( mShowing ) { mShowing = checkPrimeAncestry( mPrime ) && checkSubordinateAncestry( mSubordinate ); } return mShowing; } private boolean isShowing() { return mShowing; } private void setShowing( boolean pShowing ) { mShowing = pShowing; } private static boolean hasContent( WidgetPair pPair ) { return (pPair != null) && (pPair.mPrime != null); } private PairPanel getPairPanel() { return mPairPanel; } private void setPairPanel( PairPanel pPairPanel ) { mPairPanel = pPairPanel; } } private VerticalPanel mContainer = new VerticalPanel(); private List<WidgetPair> mMembers = new ArrayList<WidgetPair>(); public AccordionVerticalPairPanel() { initWidget( mContainer ); } public boolean isEmpty() { return mMembers.isEmpty(); } public int size() { return mMembers.size(); } /** * Add the two widgets as a WidgetPair (if pPrimeWidget is not null). * * @return true if the widgets were actually added. */ public boolean add( Widget pPrimeWidget, Widget pSubordinateWidget ) { return add( new WidgetPair( pPrimeWidget, pSubordinateWidget ) ); } /** * Add the WidgetPair (if either of the widgets that make up the pair are not null). * * @return true if the WidgetPair was actually added. */ public boolean add( WidgetPair pWidgetPair ) { if ( WidgetPair.hasContent( pWidgetPair ) ) { mMembers.add( pWidgetPair ); mContainer.add( new PairPanel( this, pWidgetPair ) ); return true; } return false; } public int indexOf( WidgetPair pWidgetPair ) { return mMembers.indexOf( pWidgetPair ); } public int indexOfSubordinateWidget( Widget pSubordinateWidget ) { for ( int i = 0; i < mMembers.size(); i++ ) { WidgetPair zMember = mMembers.get( i ); if ( pSubordinateWidget == zMember.getSubordinate() ) { return i; } } return -1; } public int indexOfPrimeWidget( Widget pPrimeWidget ) { for ( int i = 0; i < mMembers.size(); i++ ) { WidgetPair zMember = mMembers.get( i ); if ( pPrimeWidget == zMember.getPrime() ) { return i; } } return -1; } /** * @return true if contents changed (i.e. actually removed) */ public boolean remove( WidgetPair pWidgetPair ) { int zIndex = indexOf( pWidgetPair ); return (zIndex != -1) && (null != remove( zIndex )); } /** * @return WidgetPair that "was" at pIndex. */ public WidgetPair remove( int pIndex ) throws IndexOutOfBoundsException { WidgetPair zRemoved = mMembers.remove( pIndex ); if ( zRemoved != null ) { PairPanel zPairPanel = zRemoved.getPairPanel(); if ( zPairPanel != null ) { zPairPanel.clear(); } zRemoved.setShowing( false ); mContainer.remove( pIndex ); } return zRemoved; } /** * Removes all widgets (both the Prime and the Subordinate). */ public void clear() { mContainer.clear(); for ( WidgetPair zMember : mMembers ) { PairPanel zPairPanel = zMember.getPairPanel(); if ( zPairPanel != null ) { zPairPanel.clear(); } zMember.setShowing( false ); } mMembers.clear(); } public void collapseAll() { for ( WidgetPair zMember : mMembers ) { PairPanel zPairPanel = zMember.getPairPanel(); if ( zPairPanel != null ) { zPairPanel.collapse(); } zMember.setShowing( false ); } } /** * Expand (show) or Collapse (!show) the pSubordinateWidget (if found) according to the pShow value requested. * * @param pSubordinateWidget the Subordinate Widget to locate * @param pShow what to do with the Subordinate Widget if located * * @return true if the Subordinate Widget was located */ public boolean show( Widget pSubordinateWidget, boolean pShow ) { return showSubordinateWidgetOf( getPairFor( pSubordinateWidget ), pShow ); } /** * Expand (show) or Collapse (!show) the Subordinate Widget (at pIndex) according to the pShow value requested. * * @param pIndex Index of the the Subordinate Widget * @param pShow what to do with the Subordinate Widget */ public void showSubordinateWidgetAt( int pIndex, boolean pShow ) throws IndexOutOfBoundsException { showSubordinateWidgetOf( mMembers.get( pIndex ), pShow ); } /** * Expand (show) or Collapse (!show) the Subordinate Widget of the WidgetPair (if found) according to the pShow value requested. * * @param pWidgetPair the Widget Pair to locate * @param pShow what to do with the Subordinate Widget of the Widget Pair if located * * @return true if the Widget Pair was located */ public boolean showSubordinateWidgetOf( WidgetPair pWidgetPair, boolean pShow ) { if ( mMembers.contains( pWidgetPair ) ) { PairPanel zPairPanel = pWidgetPair.getPairPanel(); if ( zPairPanel != null ) { if ( pShow ) { zPairPanel.expand(); } else { zPairPanel.collapse(); } pWidgetPair.setShowing( pShow ); return true; } } return false; } public boolean isShowing( Widget pSubordinateWidget ) { return isSubordinateWidgetShowing( getPairFor( pSubordinateWidget ) ); } public boolean isSubordinateWidgetShowingAt( int pIndex ) throws IndexOutOfBoundsException { return isSubordinateWidgetShowing( mMembers.get( pIndex ) ); } public boolean isSubordinateWidgetShowing( WidgetPair pWidgetPair ) { return mMembers.contains( pWidgetPair ) && pWidgetPair.isShowing(); } private WidgetPair getPairFor( Widget pSubordinateWidget ) { for ( WidgetPair zMember : mMembers ) { if ( pSubordinateWidget == zMember.getSubordinate() ) { return zMember; } } return null; } /** * Only called by the PairPanel that should be removed because the PairPanel has lost one of its widgets. */ private void removePair( PairPanel pPairPanel ) { for ( int i = 0; i < mMembers.size(); i++ ) { WidgetPair zMember = mMembers.get( i ); PairPanel zPairPanel = zMember.getPairPanel(); if ( pPairPanel == zPairPanel ) { remove( i ); return; } } } private static boolean checkSubordinateAncestry( Widget pWidget ) { return (pWidget == null) || // (null != parentClassIs( PairPanel.class, // parentClassIs( ClippingPanel.class, // parentClassIs( SubordinatePanel.class, // pWidget ) ) )); } private static boolean checkPrimeAncestry( Widget pWidget ) { return (null != parentClassIs( PairPanel.class, pWidget )); } private static Widget parentClassIs( Class<?> pClass, Widget pWidget ) { if ( pWidget != null ) { if ( null != (pWidget = pWidget.getParent()) ) { if ( pWidget.getClass() == pClass ) { return pWidget; } } } return null; } private static class PairPanel extends VerticalPanel { private AccordionVerticalPairPanel mParent; private ClippingPanel mClippingPanel; private PairPanel( AccordionVerticalPairPanel pParent, WidgetPair pWidgetPair ) { mParent = pParent; add( pWidgetPair.getPrime() ); add( mClippingPanel = new ClippingPanel( this, pWidgetPair.getSubordinate() ) ); pWidgetPair.setPairPanel( this ); } public void collapse() { mClippingPanel.collapse(); } public void expand() { mClippingPanel.expand(); } /** * Clear/Release our Widgets (this is called under two circumstances: our Parent is clearing and calling us to clean up, or * one of our children has been removed so we are no longer attached to our parent and are cleaning up). */ @Override public void clear() { mParent = null; // in case remove is called as part of the clear operation, then don't generate a potential infinite loop! super.clear(); if ( mClippingPanel != null ) { mClippingPanel.clear(); mClippingPanel = null; } } /** * Here we handle the case when either the Prime Widget is removed (by being attached somewhere else) or the Clipping Panel removes itself. * <p/> * We Automatically remove ourselves from our Parent (AccordionVerticalPairPanel). */ @Override public boolean remove( Widget w ) { boolean zRemoved = super.remove( w ); if ( zRemoved ) { if ( mParent != null ) // in case remove is called as part of the clear operation, then don't generate a potential infinite loop! { mParent.removePair( this ); clear(); } } return zRemoved; } } private static class ClippingPanel extends SimplePanel { private PairPanel mParent; private SubordinatePanel mSubordinatePanel; private AnimatedVisibility mVisibility = AnimatedVisibility.Collapsed; private AnimatedVisibility mTargetVisibility; private int mCurrentHeight = 1; private Integer mMaxHeight; private HeightAnimator mAnimator; private ClippingPanel( PairPanel pParent, Widget pSubordinateWidget ) { mParent = pParent; setWidget( mSubordinatePanel = new SubordinatePanel( this, pSubordinateWidget ) ); getStyleElement().getStyle().setOverflow( Style.Overflow.HIDDEN ); setHeight( "1px" ); } /** * Clear/Release our Widget (this is called under two circumstances: our Parent is clearing and calling us to clean up, or * our child has been removed so we are no longer attached to our parent and are cleaning up). */ @Override public void clear() { mParent = null; // in case remove is called as part of the clear operation, then don't generate a potential infinite loop! super.clear(); if ( mSubordinatePanel != null ) { mSubordinatePanel.clear(); mSubordinatePanel = null; } } /** * Here we handle the case when the Subordinate Panel removes itself. * <p/> * We Automatically remove ourselves from our Parent (PairPanel). */ @Override public boolean remove( Widget w ) { boolean zRemoved = super.remove( w ); if ( zRemoved ) { if ( mParent != null ) // in case remove is called as part of the clear operation, then don't generate a potential infinite loop! { mParent.remove( this ); clear(); } } return zRemoved; } public AnimatedVisibility getVisibility() { return mVisibility; } public void collapse() { if ( sizingIsReadyWithNotReadyTarget( AnimatedVisibility.Collapsed ) && mVisibility.isExpandingOrExpanded() ) { transition( AnimatedVisibility.Collapsing, 1 ); } } public void expand() { if ( sizingIsReadyWithNotReadyTarget( AnimatedVisibility.Expanded ) && mVisibility.isCollapsingOrCollapsed() ) { transition( AnimatedVisibility.Expanding, mMaxHeight ); } } /** * Some browsers implement incremental rendering, which means that when an element is added to the DOM, * it can take some time until it is actually rendered and hence actually has a size (of course if any * element along the path to the root is display=none, then a size might NEVER arrive). */ private boolean sizingIsReadyWithNotReadyTarget( AnimatedVisibility pTargetVisibility ) { if ( mMaxHeight == null ) { mTargetVisibility = pTargetVisibility; return false; } mTargetVisibility = null; return true; } /** * Called to indicate that Sizing is Ready! */ private void setMaxHeight( int pHeight ) { mMaxHeight = pHeight; // Now dispatch the last request (if any) that occured before Sizing was Ready! if ( AnimatedVisibility.Collapsed == mTargetVisibility ) { collapse(); } if ( AnimatedVisibility.Expanded == mTargetVisibility ) { expand(); } } private void setCurrentHeight( int pHeight ) { if ( pHeight < 2 ) { mVisibility = AnimatedVisibility.Collapsed; pHeight = 1; } if ( mMaxHeight <= pHeight ) { mVisibility = AnimatedVisibility.Expanded; pHeight = mMaxHeight; } mCurrentHeight = pHeight; setHeight( pHeight + "px" ); } private void transition( AnimatedVisibility pNewVisibility, int pTargetHeight ) { if ( mAnimator != null ) { mAnimator.cancel(); mAnimator = null; } mVisibility = pNewVisibility; mAnimator = new HeightAnimator( this, mCurrentHeight, pTargetHeight ); mAnimator.start(); } } private static class SubordinatePanel extends VerticalPanel { private OurSizingDeterminer mSizingDeterminer = new OurSizingDeterminer(); private ClippingPanel mParent; private SubordinatePanel( ClippingPanel pParent, Widget pSubordinateWidget ) { mParent = pParent; add( new TransparentImage() ); add( (null != pSubordinateWidget) ? pSubordinateWidget : new TransparentImage() ); } /** * Clear/Release our Widgets (this is called under two circumstances: our Parent is clearing and calling us to clean up, or * one of our children has been removed so we are no longer attached to our parent and are cleaning up). */ @Override public void clear() { mParent = null; // in case remove is called as part of the clear operation, then don't generate a potential infinite loop! super.clear(); } /** * Here we handle the case when the Subordinate Widget is removed by being attached somewhere else. * <p/> * We Automatically remove ourselves from our Parent (ClippingPanel). */ @Override public boolean remove( Widget w ) { boolean zRemoved = super.remove( w ); if ( zRemoved ) { if ( mParent != null ) // in case remove is called as part of the clear operation, then don't generate a potential infinite loop! { mParent.remove( this ); clear(); } } return zRemoved; } @Override protected void onAttach() { super.onAttach(); mSizingDeterminer.start(); } @Override protected void onDetach() { super.onDetach(); mSizingDeterminer.stop(); } /** * Some browsers implement incremental rendering, which means that when an element is added to the DOM, * it can take some time until it is actually rendered and hence actually has a size (of course if any * element along the path to the root is display=none, then a size might NEVER arrive). */ private class OurSizingDeterminer extends com.google.gwt.user.client.Timer { private Boolean mSizingDetermined; private int mHeight = 1; @Override public void run() { int zHeight = getOffsetHeight(); if ( (1 < zHeight) && (zHeight == mHeight) ) { mParent.setMaxHeight( zHeight ); mSizingDetermined = true; return; } mHeight = zHeight; if ( mSizingDetermined != null ) { schedule( 50 ); } } public void start() { if ( !Boolean.TRUE.equals( mSizingDetermined ) ) { mSizingDetermined = false; schedule( 50 ); } } public void stop() { if ( Boolean.FALSE.equals( mSizingDetermined ) ) { mSizingDetermined = null; cancel(); } } } } private static class HeightAnimator extends Animation { private ClippingPanel mClippingPanel; private int mFromHeight; private int mToHeight; private int mDelta; private boolean mCompleted = true; public HeightAnimator( ClippingPanel pClippingPanel, int pFromHeight, int pToHeight ) { mClippingPanel = pClippingPanel; mFromHeight = pFromHeight; mToHeight = pToHeight; mDelta = pToHeight - pFromHeight; } public void start() { mCompleted = false; run( Math.min( 700, Math.abs( 7 * mDelta ) ) ); } @Override protected void onUpdate( double progress ) { if ( !mCompleted ) { mClippingPanel.setCurrentHeight( mFromHeight + (int) (progress * mDelta) ); } } @Override protected void onComplete() { mCompleted = true; super.onComplete(); mClippingPanel.setCurrentHeight( mToHeight ); } } } |