Alexandre Lision | 450458a | 2013-11-22 11:33:12 -0500 | [diff] [blame] | 1 | package org.sflphone.views; |
| 2 | |
| 3 | import android.content.Context; |
| 4 | import android.content.res.TypedArray; |
| 5 | import android.graphics.Canvas; |
| 6 | import android.graphics.Paint; |
| 7 | import android.graphics.PixelFormat; |
| 8 | import android.graphics.Rect; |
| 9 | import android.graphics.drawable.Drawable; |
| 10 | import android.os.Parcel; |
| 11 | import android.os.Parcelable; |
| 12 | import android.support.v4.view.MotionEventCompat; |
| 13 | import android.support.v4.view.ViewCompat; |
| 14 | import android.support.v4.widget.ViewDragHelper; |
| 15 | import android.util.AttributeSet; |
| 16 | import android.util.Log; |
| 17 | import android.view.MotionEvent; |
| 18 | import android.view.SoundEffectConstants; |
| 19 | import android.view.View; |
| 20 | import android.view.ViewConfiguration; |
| 21 | import android.view.ViewGroup; |
| 22 | import android.view.accessibility.AccessibilityEvent; |
| 23 | |
| 24 | public class SlidingUpPanelLayout extends ViewGroup { |
| 25 | |
| 26 | private static final String TAG = SlidingUpPanelLayout.class.getSimpleName(); |
| 27 | |
| 28 | /** |
| 29 | * Default peeking out panel height |
| 30 | */ |
| 31 | private static final int DEFAULT_PANEL_HEIGHT = 68; // dp; |
| 32 | |
| 33 | /** |
| 34 | * Default height of the shadow above the peeking out panel |
| 35 | */ |
| 36 | private static final int DEFAULT_SHADOW_HEIGHT = 4; // dp; |
| 37 | |
| 38 | /** |
| 39 | * If no fade color is given by default it will fade to 80% gray. |
| 40 | */ |
| 41 | private static final int DEFAULT_FADE_COLOR = 0x99000000; |
| 42 | |
| 43 | /** |
| 44 | * Minimum velocity that will be detected as a fling |
| 45 | */ |
| 46 | private static final int MIN_FLING_VELOCITY = 400; // dips per second |
| 47 | |
| 48 | /** |
| 49 | * The fade color used for the panel covered by the slider. 0 = no fading. |
| 50 | */ |
| 51 | private int mCoveredFadeColor = DEFAULT_FADE_COLOR; |
| 52 | |
| 53 | /** |
| 54 | * The paint used to dim the main layout when sliding |
| 55 | */ |
| 56 | private final Paint mCoveredFadePaint = new Paint(); |
| 57 | |
| 58 | /** |
| 59 | * Drawable used to draw the shadow between panes. |
| 60 | */ |
| 61 | private Drawable mShadowDrawable; |
| 62 | |
| 63 | /** |
| 64 | * The size of the overhang in pixels. |
| 65 | */ |
| 66 | private int mPanelHeight; |
| 67 | |
| 68 | /** |
| 69 | * The size of the shadow in pixels. |
| 70 | */ |
| 71 | private final int mShadowHeight; |
| 72 | |
| 73 | /** |
| 74 | * True if a panel can slide with the current measurements |
| 75 | */ |
| 76 | private boolean mCanSlide; |
| 77 | |
| 78 | /** |
| 79 | * If provided, the panel can be dragged by only this view. Otherwise, the entire panel can be used for dragging. |
| 80 | */ |
| 81 | private View mDragView; |
| 82 | |
| 83 | /** |
| 84 | * The child view that can slide, if any. |
| 85 | */ |
| 86 | private View mSlideableView; |
| 87 | |
| 88 | /** |
| 89 | * How far the panel is offset from its expanded position. range [0, 1] where 0 = expanded, 1 = collapsed. |
| 90 | */ |
| 91 | private float mSlideOffset; |
| 92 | |
| 93 | /** |
| 94 | * How far in pixels the slideable panel may move. |
| 95 | */ |
| 96 | private int mSlideRange; |
| 97 | |
| 98 | /** |
| 99 | * A panel view is locked into internal scrolling or another condition that is preventing a drag. |
| 100 | */ |
| 101 | private boolean mIsUnableToDrag; |
| 102 | |
| 103 | /** |
| 104 | * Flag indicating that sliding feature is enabled\disabled |
| 105 | */ |
| 106 | private boolean mIsSlidingEnabled; |
| 107 | |
| 108 | /** |
| 109 | * Flag indicating if a drag view can have its own touch events. If set to true, a drag view can scroll horizontally and have its own click |
| 110 | * listener. |
| 111 | * |
| 112 | * Default is set to false. |
| 113 | */ |
| 114 | private boolean mIsUsingDragViewTouchEvents; |
| 115 | |
| 116 | /** |
| 117 | * Threshold to tell if there was a scroll touch event. |
| 118 | */ |
| 119 | private int mScrollTouchSlop; |
| 120 | |
| 121 | private float mInitialMotionX; |
| 122 | private float mInitialMotionY; |
| 123 | private boolean mDragViewHit; |
| 124 | private float mAnchorPoint = 0.f; |
| 125 | |
| 126 | private PanelSlideListener mPanelSlideListener; |
| 127 | |
| 128 | private final ViewDragHelper mDragHelper; |
| 129 | |
| 130 | /** |
| 131 | * Stores whether or not the pane was expanded the last time it was slideable. If expand/collapse operations are invoked this state is modified. |
| 132 | * Used by instance state save/restore. |
| 133 | */ |
| 134 | private boolean mPreservedExpandedState; |
| 135 | private boolean mFirstLayout = true; |
| 136 | |
| 137 | private final Rect mTmpRect = new Rect(); |
| 138 | |
| 139 | /** |
| 140 | * Listener for monitoring events about sliding panes. |
| 141 | */ |
| 142 | public interface PanelSlideListener { |
| 143 | /** |
| 144 | * Called when a sliding pane's position changes. |
| 145 | * |
| 146 | * @param panel |
| 147 | * The child view that was moved |
| 148 | * @param slideOffset |
| 149 | * The new offset of this sliding pane within its range, from 0-1 |
| 150 | */ |
| 151 | public void onPanelSlide(View panel, float slideOffset); |
| 152 | |
| 153 | /** |
| 154 | * Called when a sliding pane becomes slid completely collapsed. The pane may or may not be interactive at this point depending on if it's |
| 155 | * shown or hidden |
| 156 | * |
| 157 | * @param panel |
| 158 | * The child view that was slid to an collapsed position, revealing other panes |
| 159 | */ |
| 160 | public void onPanelCollapsed(View panel); |
| 161 | |
| 162 | /** |
| 163 | * Called when a sliding pane becomes slid completely expanded. The pane is now guaranteed to be interactive. It may now obscure other views |
| 164 | * in the layout. |
| 165 | * |
| 166 | * @param panel |
| 167 | * The child view that was slid to a expanded position |
| 168 | */ |
| 169 | public void onPanelExpanded(View panel); |
| 170 | |
| 171 | public void onPanelAnchored(View panel); |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * No-op stubs for {@link PanelSlideListener}. If you only want to implement a subset of the listener methods you can extend this instead of |
| 176 | * implement the full interface. |
| 177 | */ |
| 178 | public static class SimplePanelSlideListener implements PanelSlideListener { |
| 179 | @Override |
| 180 | public void onPanelSlide(View panel, float slideOffset) { |
| 181 | } |
| 182 | |
| 183 | @Override |
| 184 | public void onPanelCollapsed(View panel) { |
| 185 | } |
| 186 | |
| 187 | @Override |
| 188 | public void onPanelExpanded(View panel) { |
| 189 | } |
| 190 | |
| 191 | @Override |
| 192 | public void onPanelAnchored(View panel) { |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | public SlidingUpPanelLayout(Context context) { |
| 197 | this(context, null); |
| 198 | } |
| 199 | |
| 200 | public SlidingUpPanelLayout(Context context, AttributeSet attrs) { |
| 201 | this(context, attrs, 0); |
| 202 | } |
| 203 | |
| 204 | public SlidingUpPanelLayout(Context context, AttributeSet attrs, int defStyle) { |
| 205 | super(context, attrs, defStyle); |
| 206 | |
| 207 | final float density = context.getResources().getDisplayMetrics().density; |
| 208 | mPanelHeight = (int) (DEFAULT_PANEL_HEIGHT * density + 0.5f); |
| 209 | mShadowHeight = (int) (DEFAULT_SHADOW_HEIGHT * density + 0.5f); |
| 210 | |
| 211 | setWillNotDraw(false); |
| 212 | |
| 213 | mDragHelper = ViewDragHelper.create(this, 0.5f, new DragHelperCallback()); |
| 214 | mDragHelper.setMinVelocity(MIN_FLING_VELOCITY * density); |
| 215 | |
| 216 | mCanSlide = true; |
| 217 | mIsSlidingEnabled = true; |
| 218 | |
| 219 | setCoveredFadeColor(DEFAULT_FADE_COLOR); |
| 220 | |
| 221 | ViewConfiguration vc = ViewConfiguration.get(context); |
| 222 | mScrollTouchSlop = vc.getScaledTouchSlop(); |
| 223 | } |
| 224 | |
| 225 | /** |
| 226 | * Set the color used to fade the pane covered by the sliding pane out when the pane will become fully covered in the expanded state. |
| 227 | * |
| 228 | * @param color |
| 229 | * An ARGB-packed color value |
| 230 | */ |
| 231 | public void setCoveredFadeColor(int color) { |
| 232 | mCoveredFadeColor = color; |
| 233 | invalidate(); |
| 234 | } |
| 235 | |
| 236 | /** |
| 237 | * @return The ARGB-packed color value used to fade the fixed pane |
| 238 | */ |
| 239 | public int getCoveredFadeColor() { |
| 240 | return mCoveredFadeColor; |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * Set the collapsed panel height in pixels |
| 245 | * |
| 246 | * @param val |
| 247 | * A height in pixels |
| 248 | */ |
| 249 | public void setPanelHeight(int val) { |
| 250 | mPanelHeight = val; |
| 251 | requestLayout(); |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * @return The current collapsed panel height |
| 256 | */ |
| 257 | public int getPanelHeight() { |
| 258 | return mPanelHeight; |
| 259 | } |
| 260 | |
| 261 | public void setPanelSlideListener(PanelSlideListener listener) { |
| 262 | mPanelSlideListener = listener; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * Set the draggable view portion. Use to null, to allow the whole panel to be draggable |
| 267 | * |
| 268 | * @param dragView |
| 269 | * A view that will be used to drag the panel. |
| 270 | */ |
| 271 | public void setDragView(View dragView) { |
| 272 | mDragView = dragView; |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * Set an anchor point where the panel can stop during sliding |
| 277 | * |
| 278 | * @param anchorPoint |
| 279 | * A value between 0 and 1, determining the position of the anchor point starting from the top of the layout. |
| 280 | */ |
| 281 | public void setAnchorPoint(float anchorPoint) { |
| 282 | if (anchorPoint > 0 && anchorPoint < 1) |
| 283 | mAnchorPoint = anchorPoint; |
| 284 | } |
| 285 | |
| 286 | /** |
| 287 | * Set the shadow for the sliding panel |
| 288 | * |
| 289 | */ |
| 290 | public void setShadowDrawable(Drawable drawable) { |
| 291 | mShadowDrawable = drawable; |
| 292 | } |
| 293 | |
| 294 | void dispatchOnPanelSlide(View panel) { |
| 295 | if (mPanelSlideListener != null) { |
| 296 | mPanelSlideListener.onPanelSlide(panel, mSlideOffset); |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | void dispatchOnPanelExpanded(View panel) { |
| 301 | if (mPanelSlideListener != null) { |
| 302 | mPanelSlideListener.onPanelExpanded(panel); |
| 303 | } |
| 304 | sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED); |
| 305 | } |
| 306 | |
| 307 | void dispatchOnPanelCollapsed(View panel) { |
| 308 | if (mPanelSlideListener != null) { |
| 309 | mPanelSlideListener.onPanelCollapsed(panel); |
| 310 | } |
| 311 | sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED); |
| 312 | } |
| 313 | |
| 314 | void dispatchOnPanelAnchored(View panel) { |
| 315 | if (mPanelSlideListener != null) { |
| 316 | mPanelSlideListener.onPanelAnchored(panel); |
| 317 | } |
| 318 | sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED); |
| 319 | } |
| 320 | |
| 321 | void updateObscuredViewVisibility() { |
| 322 | if (getChildCount() == 0) { |
| 323 | return; |
| 324 | } |
| 325 | final int leftBound = getPaddingLeft(); |
| 326 | final int rightBound = getWidth() - getPaddingRight(); |
| 327 | final int topBound = getPaddingTop(); |
| 328 | final int bottomBound = getHeight() - getPaddingBottom(); |
| 329 | final int left; |
| 330 | final int right; |
| 331 | final int top; |
| 332 | final int bottom; |
| 333 | if (mSlideableView != null && hasOpaqueBackground(mSlideableView)) { |
| 334 | left = mSlideableView.getLeft(); |
| 335 | right = mSlideableView.getRight(); |
| 336 | top = mSlideableView.getTop(); |
| 337 | bottom = mSlideableView.getBottom(); |
| 338 | } else { |
| 339 | left = right = top = bottom = 0; |
| 340 | } |
| 341 | View child = getChildAt(0); |
| 342 | final int clampedChildLeft = Math.max(leftBound, child.getLeft()); |
| 343 | final int clampedChildTop = Math.max(topBound, child.getTop()); |
| 344 | final int clampedChildRight = Math.min(rightBound, child.getRight()); |
| 345 | final int clampedChildBottom = Math.min(bottomBound, child.getBottom()); |
| 346 | final int vis; |
| 347 | if (clampedChildLeft >= left && clampedChildTop >= top && clampedChildRight <= right && clampedChildBottom <= bottom) { |
| 348 | vis = INVISIBLE; |
| 349 | } else { |
| 350 | vis = VISIBLE; |
| 351 | } |
| 352 | child.setVisibility(vis); |
| 353 | } |
| 354 | |
| 355 | void setAllChildrenVisible() { |
| 356 | for (int i = 0, childCount = getChildCount(); i < childCount; i++) { |
| 357 | final View child = getChildAt(i); |
| 358 | if (child.getVisibility() == INVISIBLE) { |
| 359 | child.setVisibility(VISIBLE); |
| 360 | } |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | private static boolean hasOpaqueBackground(View v) { |
| 365 | final Drawable bg = v.getBackground(); |
| 366 | if (bg != null) { |
| 367 | return bg.getOpacity() == PixelFormat.OPAQUE; |
| 368 | } |
| 369 | return false; |
| 370 | } |
| 371 | |
| 372 | @Override |
| 373 | protected void onAttachedToWindow() { |
| 374 | super.onAttachedToWindow(); |
| 375 | mFirstLayout = true; |
| 376 | } |
| 377 | |
| 378 | @Override |
| 379 | protected void onDetachedFromWindow() { |
| 380 | super.onDetachedFromWindow(); |
| 381 | mFirstLayout = true; |
| 382 | } |
| 383 | |
| 384 | @Override |
| 385 | protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| 386 | final int widthMode = MeasureSpec.getMode(widthMeasureSpec); |
| 387 | final int widthSize = MeasureSpec.getSize(widthMeasureSpec); |
| 388 | final int heightMode = MeasureSpec.getMode(heightMeasureSpec); |
| 389 | final int heightSize = MeasureSpec.getSize(heightMeasureSpec); |
| 390 | |
| 391 | if (widthMode != MeasureSpec.EXACTLY) { |
| 392 | throw new IllegalStateException("Width must have an exact value or MATCH_PARENT"); |
| 393 | } else if (heightMode != MeasureSpec.EXACTLY) { |
| 394 | throw new IllegalStateException("Height must have an exact value or MATCH_PARENT"); |
| 395 | } |
| 396 | |
| 397 | int layoutHeight = heightSize - getPaddingTop() - getPaddingBottom(); |
| 398 | int panelHeight = mPanelHeight; |
| 399 | |
| 400 | final int childCount = getChildCount(); |
| 401 | |
| 402 | if (childCount > 2) { |
| 403 | Log.e(TAG, "onMeasure: More than two child views are not supported."); |
| 404 | } else if (getChildAt(1).getVisibility() == GONE) { |
| 405 | panelHeight = 0; |
| 406 | } |
| 407 | |
| 408 | // We'll find the current one below. |
| 409 | mSlideableView = null; |
| 410 | mCanSlide = false; |
| 411 | |
| 412 | // First pass. Measure based on child LayoutParams width/height. |
| 413 | for (int i = 0; i < childCount; i++) { |
| 414 | final View child = getChildAt(i); |
| 415 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| 416 | |
| 417 | int height = layoutHeight; |
| 418 | if (child.getVisibility() == GONE) { |
| 419 | lp.dimWhenOffset = false; |
| 420 | continue; |
| 421 | } |
| 422 | |
| 423 | if (i == 1) { |
| 424 | lp.slideable = true; |
| 425 | lp.dimWhenOffset = true; |
| 426 | mSlideableView = child; |
| 427 | mCanSlide = true; |
| 428 | } else { |
| 429 | height -= panelHeight; |
| 430 | } |
| 431 | |
| 432 | int childWidthSpec; |
| 433 | if (lp.width == LayoutParams.WRAP_CONTENT) { |
| 434 | childWidthSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.AT_MOST); |
| 435 | } else if (lp.width == LayoutParams.MATCH_PARENT) { |
| 436 | childWidthSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.EXACTLY); |
| 437 | } else { |
| 438 | childWidthSpec = MeasureSpec.makeMeasureSpec(lp.width, MeasureSpec.EXACTLY); |
| 439 | } |
| 440 | |
| 441 | int childHeightSpec; |
| 442 | if (lp.height == LayoutParams.WRAP_CONTENT) { |
| 443 | childHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.AT_MOST); |
| 444 | } else if (lp.height == LayoutParams.MATCH_PARENT) { |
| 445 | childHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); |
| 446 | } else { |
| 447 | childHeightSpec = MeasureSpec.makeMeasureSpec(lp.height, MeasureSpec.EXACTLY); |
| 448 | } |
| 449 | |
| 450 | child.measure(childWidthSpec, childHeightSpec); |
| 451 | } |
| 452 | |
| 453 | setMeasuredDimension(widthSize, heightSize); |
| 454 | } |
| 455 | |
| 456 | @Override |
| 457 | protected void onLayout(boolean changed, int l, int t, int r, int b) { |
| 458 | final int paddingLeft = getPaddingLeft(); |
| 459 | final int paddingTop = getPaddingTop(); |
| 460 | |
| 461 | final int childCount = getChildCount(); |
| 462 | int yStart = paddingTop; |
| 463 | int nextYStart = yStart; |
| 464 | |
| 465 | if (mFirstLayout) { |
| 466 | mSlideOffset = mCanSlide && mPreservedExpandedState ? 0.f : 1.f; |
| 467 | } |
| 468 | |
| 469 | for (int i = 0; i < childCount; i++) { |
| 470 | final View child = getChildAt(i); |
| 471 | |
| 472 | if (child.getVisibility() == GONE) { |
| 473 | continue; |
| 474 | } |
| 475 | |
| 476 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| 477 | |
| 478 | int childHeight = child.getMeasuredHeight(); |
| 479 | |
| 480 | if (lp.slideable) { |
| 481 | mSlideRange = childHeight - mPanelHeight; |
| 482 | yStart += (int) (mSlideRange * mSlideOffset); |
| 483 | } else { |
| 484 | yStart = nextYStart; |
| 485 | } |
| 486 | |
| 487 | final int childTop = yStart; |
| 488 | final int childBottom = childTop + childHeight; |
| 489 | final int childLeft = paddingLeft; |
| 490 | final int childRight = childLeft + child.getMeasuredWidth(); |
| 491 | child.layout(childLeft, childTop, childRight, childBottom); |
| 492 | |
| 493 | nextYStart += child.getHeight(); |
| 494 | } |
| 495 | |
| 496 | if (mFirstLayout) { |
| 497 | updateObscuredViewVisibility(); |
| 498 | } |
| 499 | |
| 500 | mFirstLayout = false; |
| 501 | } |
| 502 | |
| 503 | @Override |
| 504 | protected void onSizeChanged(int w, int h, int oldw, int oldh) { |
| 505 | super.onSizeChanged(w, h, oldw, oldh); |
| 506 | // Recalculate sliding panes and their details |
| 507 | if (h != oldh) { |
| 508 | mFirstLayout = true; |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | /** |
| 513 | * Set sliding enabled flag |
| 514 | * |
| 515 | * @param enabled |
| 516 | * flag value |
| 517 | */ |
| 518 | public void setSlidingEnabled(boolean enabled) { |
| 519 | mIsSlidingEnabled = enabled; |
| 520 | } |
| 521 | |
| 522 | /** |
| 523 | * Set if the drag view can have its own touch events. If set to true, a drag view can scroll horizontally and have its own click listener. |
| 524 | * |
| 525 | * Default is set to false. |
| 526 | */ |
| 527 | public void setEnableDragViewTouchEvents(boolean enabled) { |
| 528 | mIsUsingDragViewTouchEvents = enabled; |
| 529 | } |
| 530 | |
| 531 | private boolean isDragViewHit(int x, int y) { |
| 532 | View v = mDragView != null ? mDragView : mSlideableView; |
| 533 | if (v == null) |
| 534 | return false; |
| 535 | int[] viewLocation = new int[2]; |
| 536 | v.getLocationOnScreen(viewLocation); |
| 537 | int[] parentLocation = new int[2]; |
| 538 | this.getLocationOnScreen(parentLocation); |
| 539 | int screenX = parentLocation[0] + x; |
| 540 | int screenY = parentLocation[1] + y; |
| 541 | return screenX >= viewLocation[0] && screenX < viewLocation[0] + v.getWidth() && screenY >= viewLocation[1] |
| 542 | && screenY < viewLocation[1] + v.getHeight(); |
| 543 | } |
| 544 | |
| 545 | @Override |
| 546 | public void requestChildFocus(View child, View focused) { |
| 547 | super.requestChildFocus(child, focused); |
| 548 | if (!isInTouchMode() && !mCanSlide) { |
| 549 | mPreservedExpandedState = child == mSlideableView; |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | @Override |
| 554 | public boolean onInterceptTouchEvent(MotionEvent ev) { |
| 555 | final int action = MotionEventCompat.getActionMasked(ev); |
| 556 | |
| 557 | if (!mCanSlide || !mIsSlidingEnabled || (mIsUnableToDrag && action != MotionEvent.ACTION_DOWN)) { |
| 558 | mDragHelper.cancel(); |
| 559 | return super.onInterceptTouchEvent(ev); |
| 560 | } |
| 561 | |
| 562 | if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP) { |
| 563 | mDragHelper.cancel(); |
| 564 | return false; |
| 565 | } |
| 566 | |
| 567 | final float x = ev.getX(); |
| 568 | final float y = ev.getY(); |
| 569 | boolean interceptTap = false; |
| 570 | |
| 571 | switch (action) { |
| 572 | case MotionEvent.ACTION_DOWN: { |
| 573 | mIsUnableToDrag = false; |
| 574 | mInitialMotionX = x; |
| 575 | mInitialMotionY = y; |
| 576 | mDragViewHit = isDragViewHit((int) x, (int) y); |
| 577 | |
| 578 | if (mDragViewHit && !mIsUsingDragViewTouchEvents) { |
| 579 | interceptTap = true; |
| 580 | } |
| 581 | break; |
| 582 | } |
| 583 | |
| 584 | case MotionEvent.ACTION_MOVE: { |
| 585 | final float adx = Math.abs(x - mInitialMotionX); |
| 586 | final float ady = Math.abs(y - mInitialMotionY); |
| 587 | final int dragSlop = mDragHelper.getTouchSlop(); |
| 588 | |
| 589 | // Handle any horizontal scrolling on the drag view. |
| 590 | if (mIsUsingDragViewTouchEvents) { |
| 591 | if (adx > mScrollTouchSlop && ady < mScrollTouchSlop) { |
| 592 | return super.onInterceptTouchEvent(ev); |
| 593 | } |
| 594 | // Intercept the touch if the drag view has any vertical scroll. |
| 595 | // onTouchEvent will determine if the view should drag vertically. |
| 596 | else if (ady > mScrollTouchSlop) { |
| 597 | interceptTap = mDragViewHit; |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | if (ady > dragSlop && adx > ady) { |
| 602 | mDragHelper.cancel(); |
| 603 | mIsUnableToDrag = true; |
| 604 | return false; |
| 605 | } |
| 606 | break; |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | final boolean interceptForDrag = mDragViewHit && mDragHelper.shouldInterceptTouchEvent(ev); |
| 611 | |
| 612 | return interceptForDrag || interceptTap; |
| 613 | } |
| 614 | |
| 615 | @Override |
| 616 | public boolean onTouchEvent(MotionEvent ev) { |
| 617 | if (!mCanSlide || !mIsSlidingEnabled) { |
| 618 | return super.onTouchEvent(ev); |
| 619 | } |
| 620 | |
| 621 | mDragHelper.processTouchEvent(ev); |
| 622 | |
| 623 | final int action = ev.getAction(); |
| 624 | boolean wantTouchEvents = true; |
| 625 | |
| 626 | switch (action & MotionEventCompat.ACTION_MASK) { |
| 627 | case MotionEvent.ACTION_DOWN: { |
| 628 | final float x = ev.getX(); |
| 629 | final float y = ev.getY(); |
| 630 | mInitialMotionX = x; |
| 631 | mInitialMotionY = y; |
| 632 | break; |
| 633 | } |
| 634 | |
| 635 | case MotionEvent.ACTION_UP: { |
| 636 | final float x = ev.getX(); |
| 637 | final float y = ev.getY(); |
| 638 | final float dx = x - mInitialMotionX; |
| 639 | final float dy = y - mInitialMotionY; |
| 640 | final int slop = mDragHelper.getTouchSlop(); |
| 641 | if (dx * dx + dy * dy < slop * slop && isDragViewHit((int) x, (int) y)) { |
| 642 | View v = mDragView != null ? mDragView : mSlideableView; |
| 643 | v.playSoundEffect(SoundEffectConstants.CLICK); |
| 644 | if (!isExpanded() && !isAnchored()) { |
| 645 | expandPane(mSlideableView, 0, mAnchorPoint); |
| 646 | } else { |
| 647 | collapsePane(); |
| 648 | } |
| 649 | break; |
| 650 | } |
| 651 | break; |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | return wantTouchEvents; |
| 656 | } |
| 657 | |
| 658 | private boolean expandPane(View pane, int initialVelocity, float mSlideOffset) { |
| 659 | if (mFirstLayout || smoothSlideTo(mSlideOffset, initialVelocity)) { |
| 660 | mPreservedExpandedState = true; |
| 661 | return true; |
| 662 | } |
| 663 | return false; |
| 664 | } |
| 665 | |
| 666 | private boolean collapsePane(View pane, int initialVelocity) { |
| 667 | if (mFirstLayout || smoothSlideTo(1.f, initialVelocity)) { |
| 668 | mPreservedExpandedState = false; |
| 669 | return true; |
| 670 | } |
| 671 | return false; |
| 672 | } |
| 673 | |
| 674 | /** |
| 675 | * Collapse the sliding pane if it is currently slideable. If first layout has already completed this will animate. |
| 676 | * |
| 677 | * @return true if the pane was slideable and is now collapsed/in the process of collapsing |
| 678 | */ |
| 679 | public boolean collapsePane() { |
| 680 | return collapsePane(mSlideableView, 0); |
| 681 | } |
| 682 | |
| 683 | /** |
| 684 | * Expand the sliding pane if it is currently slideable. If first layout has already completed this will animate. |
| 685 | * |
| 686 | * @return true if the pane was slideable and is now expanded/in the process of expading |
| 687 | */ |
| 688 | public boolean expandPane() { |
| 689 | return expandPane(0); |
| 690 | } |
| 691 | |
| 692 | /** |
| 693 | * Partially expand the sliding pane up to a specific offset |
| 694 | * |
| 695 | * @param mSlideOffset |
| 696 | * Value between 0 and 1, where 0 is completely expanded. |
| 697 | * @return true if the pane was slideable and is now expanded/in the process of expading |
| 698 | */ |
| 699 | public boolean expandPane(float mSlideOffset) { |
| 700 | if (!isPaneVisible()) { |
| 701 | showPane(); |
| 702 | } |
| 703 | return expandPane(mSlideableView, 0, mSlideOffset); |
| 704 | } |
| 705 | |
| 706 | /** |
| 707 | * Check if the layout is completely expanded. |
| 708 | * |
| 709 | * @return true if sliding panels are completely expanded |
| 710 | */ |
| 711 | public boolean isExpanded() { |
| 712 | return mFirstLayout && mPreservedExpandedState || !mFirstLayout && mCanSlide && mSlideOffset == 0; |
| 713 | } |
| 714 | |
| 715 | /** |
| 716 | * Check if the layout is anchored in an intermediate point. |
| 717 | * |
| 718 | * @return true if sliding panels are anchored |
| 719 | */ |
| 720 | public boolean isAnchored() { |
| 721 | int anchoredTop = (int) (mAnchorPoint * mSlideRange); |
| 722 | return !mFirstLayout && mCanSlide && mSlideOffset == (float) anchoredTop / (float) mSlideRange; |
| 723 | } |
| 724 | |
| 725 | /** |
| 726 | * Check if the content in this layout cannot fully fit side by side and therefore the content pane can be slid back and forth. |
| 727 | * |
| 728 | * @return true if content in this layout can be expanded |
| 729 | */ |
| 730 | public boolean isSlideable() { |
| 731 | return mCanSlide; |
| 732 | } |
| 733 | |
| 734 | public boolean isPaneVisible() { |
| 735 | if (getChildCount() < 2) { |
| 736 | return false; |
| 737 | } |
| 738 | View slidingPane = getChildAt(1); |
| 739 | return slidingPane.getVisibility() == View.VISIBLE; |
| 740 | } |
| 741 | |
| 742 | public void showPane() { |
| 743 | if (getChildCount() < 2) { |
| 744 | return; |
| 745 | } |
| 746 | View slidingPane = getChildAt(1); |
| 747 | slidingPane.setVisibility(View.VISIBLE); |
| 748 | requestLayout(); |
| 749 | } |
| 750 | |
| 751 | public void hidePane() { |
| 752 | if (mSlideableView == null) { |
| 753 | return; |
| 754 | } |
| 755 | mSlideableView.setVisibility(View.GONE); |
| 756 | requestLayout(); |
| 757 | } |
| 758 | |
| 759 | private void onPanelDragged(int newTop) { |
| 760 | final int topBound = getPaddingTop(); |
| 761 | mSlideOffset = (float) (newTop - topBound) / mSlideRange; |
| 762 | dispatchOnPanelSlide(mSlideableView); |
| 763 | } |
| 764 | |
| 765 | @Override |
| 766 | protected boolean drawChild(Canvas canvas, View child, long drawingTime) { |
| 767 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| 768 | boolean result; |
| 769 | final int save = canvas.save(Canvas.CLIP_SAVE_FLAG); |
| 770 | |
| 771 | boolean drawScrim = false; |
| 772 | |
| 773 | if (mCanSlide && !lp.slideable && mSlideableView != null) { |
| 774 | // Clip against the slider; no sense drawing what will immediately be covered. |
| 775 | canvas.getClipBounds(mTmpRect); |
Alexandre Lision | 0936ba6 | 2013-11-25 10:04:56 -0500 | [diff] [blame] | 776 | mTmpRect.bottom = (int) Math.min(mTmpRect.bottom, mSlideableView.getTop() + getResources().getDisplayMetrics().density * 68); // + 60 |
| 777 | // cause of |
| 778 | // the |
| 779 | // rounded |
| 780 | // shape |
| 781 | // handle |
Alexandre Lision | 450458a | 2013-11-22 11:33:12 -0500 | [diff] [blame] | 782 | canvas.clipRect(mTmpRect); |
| 783 | if (mSlideOffset < 1) { |
| 784 | drawScrim = true; |
| 785 | } |
| 786 | } |
| 787 | |
| 788 | result = super.drawChild(canvas, child, drawingTime); |
| 789 | canvas.restoreToCount(save); |
| 790 | |
| 791 | if (drawScrim) { |
| 792 | final int baseAlpha = (mCoveredFadeColor & 0xff000000) >>> 24; |
| 793 | final int imag = (int) (baseAlpha * (1 - mSlideOffset)); |
| 794 | final int color = imag << 24 | (mCoveredFadeColor & 0xffffff); |
| 795 | mCoveredFadePaint.setColor(color); |
| 796 | canvas.drawRect(mTmpRect, mCoveredFadePaint); |
| 797 | } |
| 798 | |
| 799 | return result; |
| 800 | } |
| 801 | |
| 802 | /** |
| 803 | * Smoothly animate mDraggingPane to the target X position within its range. |
| 804 | * |
| 805 | * @param slideOffset |
| 806 | * position to animate to |
| 807 | * @param velocity |
| 808 | * initial velocity in case of fling, or 0. |
| 809 | */ |
| 810 | boolean smoothSlideTo(float slideOffset, int velocity) { |
| 811 | if (!mCanSlide) { |
| 812 | // Nothing to do. |
| 813 | return false; |
| 814 | } |
| 815 | |
| 816 | final int topBound = getPaddingTop(); |
| 817 | int y = (int) (topBound + slideOffset * mSlideRange); |
| 818 | |
| 819 | if (mDragHelper.smoothSlideViewTo(mSlideableView, mSlideableView.getLeft(), y)) { |
| 820 | setAllChildrenVisible(); |
| 821 | ViewCompat.postInvalidateOnAnimation(this); |
| 822 | return true; |
| 823 | } |
| 824 | return false; |
| 825 | } |
| 826 | |
| 827 | @Override |
| 828 | public void computeScroll() { |
| 829 | if (mDragHelper.continueSettling(true)) { |
| 830 | if (!mCanSlide) { |
| 831 | mDragHelper.abort(); |
| 832 | return; |
| 833 | } |
| 834 | |
| 835 | ViewCompat.postInvalidateOnAnimation(this); |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | @Override |
| 840 | public void draw(Canvas c) { |
| 841 | super.draw(c); |
| 842 | |
| 843 | if (mSlideableView == null) { |
| 844 | // No need to draw a shadow if we don't have one. |
| 845 | return; |
| 846 | } |
| 847 | |
| 848 | final int right = mSlideableView.getRight(); |
| 849 | final int top = mSlideableView.getTop() - mShadowHeight; |
| 850 | final int bottom = mSlideableView.getTop(); |
| 851 | final int left = mSlideableView.getLeft(); |
| 852 | |
| 853 | if (mShadowDrawable != null) { |
| 854 | mShadowDrawable.setBounds(left, top, right, bottom); |
| 855 | mShadowDrawable.draw(c); |
| 856 | } |
| 857 | } |
| 858 | |
| 859 | /** |
| 860 | * Tests scrollability within child views of v given a delta of dx. |
| 861 | * |
| 862 | * @param v |
| 863 | * View to test for horizontal scrollability |
| 864 | * @param checkV |
| 865 | * Whether the view v passed should itself be checked for scrollability (true), or just its children (false). |
| 866 | * @param dx |
| 867 | * Delta scrolled in pixels |
| 868 | * @param x |
| 869 | * X coordinate of the active touch point |
| 870 | * @param y |
| 871 | * Y coordinate of the active touch point |
| 872 | * @return true if child views of v can be scrolled by delta of dx. |
| 873 | */ |
| 874 | protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) { |
| 875 | if (v instanceof ViewGroup) { |
| 876 | final ViewGroup group = (ViewGroup) v; |
| 877 | final int scrollX = v.getScrollX(); |
| 878 | final int scrollY = v.getScrollY(); |
| 879 | final int count = group.getChildCount(); |
| 880 | // Count backwards - let topmost views consume scroll distance first. |
| 881 | for (int i = count - 1; i >= 0; i--) { |
| 882 | final View child = group.getChildAt(i); |
| 883 | if (x + scrollX >= child.getLeft() && x + scrollX < child.getRight() && y + scrollY >= child.getTop() |
| 884 | && y + scrollY < child.getBottom() && canScroll(child, true, dx, x + scrollX - child.getLeft(), y + scrollY - child.getTop())) { |
| 885 | return true; |
| 886 | } |
| 887 | } |
| 888 | } |
| 889 | return checkV && ViewCompat.canScrollHorizontally(v, -dx); |
| 890 | } |
| 891 | |
| 892 | @Override |
| 893 | protected ViewGroup.LayoutParams generateDefaultLayoutParams() { |
| 894 | return new LayoutParams(); |
| 895 | } |
| 896 | |
| 897 | @Override |
| 898 | protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { |
| 899 | return p instanceof MarginLayoutParams ? new LayoutParams((MarginLayoutParams) p) : new LayoutParams(p); |
| 900 | } |
| 901 | |
| 902 | @Override |
| 903 | protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { |
| 904 | return p instanceof LayoutParams && super.checkLayoutParams(p); |
| 905 | } |
| 906 | |
| 907 | @Override |
| 908 | public ViewGroup.LayoutParams generateLayoutParams(AttributeSet attrs) { |
| 909 | return new LayoutParams(getContext(), attrs); |
| 910 | } |
| 911 | |
| 912 | @Override |
| 913 | protected Parcelable onSaveInstanceState() { |
| 914 | Parcelable superState = super.onSaveInstanceState(); |
| 915 | |
| 916 | SavedState ss = new SavedState(superState); |
| 917 | ss.isExpanded = isSlideable() ? isExpanded() : mPreservedExpandedState; |
| 918 | |
| 919 | return ss; |
| 920 | } |
| 921 | |
| 922 | @Override |
| 923 | protected void onRestoreInstanceState(Parcelable state) { |
| 924 | SavedState ss = (SavedState) state; |
| 925 | super.onRestoreInstanceState(ss.getSuperState()); |
| 926 | |
| 927 | if (ss.isExpanded) { |
| 928 | expandPane(); |
| 929 | } else { |
| 930 | collapsePane(); |
| 931 | } |
| 932 | mPreservedExpandedState = ss.isExpanded; |
| 933 | } |
| 934 | |
| 935 | private class DragHelperCallback extends ViewDragHelper.Callback { |
| 936 | |
| 937 | @Override |
| 938 | public boolean tryCaptureView(View child, int pointerId) { |
| 939 | if (mIsUnableToDrag) { |
| 940 | return false; |
| 941 | } |
| 942 | |
| 943 | return ((LayoutParams) child.getLayoutParams()).slideable; |
| 944 | } |
| 945 | |
| 946 | @Override |
| 947 | public void onViewDragStateChanged(int state) { |
| 948 | if (mDragHelper.getViewDragState() == ViewDragHelper.STATE_IDLE) { |
| 949 | if (mSlideOffset == 0) { |
| 950 | updateObscuredViewVisibility(); |
| 951 | dispatchOnPanelExpanded(mSlideableView); |
| 952 | mPreservedExpandedState = true; |
| 953 | } else if (isAnchored()) { |
| 954 | updateObscuredViewVisibility(); |
| 955 | dispatchOnPanelAnchored(mSlideableView); |
| 956 | mPreservedExpandedState = true; |
| 957 | } else { |
| 958 | dispatchOnPanelCollapsed(mSlideableView); |
| 959 | mPreservedExpandedState = false; |
| 960 | } |
| 961 | } |
| 962 | } |
| 963 | |
| 964 | @Override |
| 965 | public void onViewCaptured(View capturedChild, int activePointerId) { |
| 966 | // Make all child views visible in preparation for sliding things around |
| 967 | setAllChildrenVisible(); |
| 968 | } |
| 969 | |
| 970 | @Override |
| 971 | public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) { |
| 972 | onPanelDragged(top); |
| 973 | invalidate(); |
| 974 | } |
| 975 | |
| 976 | @Override |
| 977 | public void onViewReleased(View releasedChild, float xvel, float yvel) { |
| 978 | int top = getPaddingTop(); |
| 979 | |
| 980 | if (mAnchorPoint != 0) { |
| 981 | int anchoredTop = (int) (mAnchorPoint * mSlideRange); |
| 982 | float anchorOffset = (float) anchoredTop / (float) mSlideRange; |
| 983 | |
| 984 | if (yvel > 0 || (yvel == 0 && mSlideOffset >= (1f + anchorOffset) / 2)) { |
| 985 | top += mSlideRange; |
| 986 | } else if (yvel == 0 && mSlideOffset < (1f + anchorOffset) / 2 && mSlideOffset >= anchorOffset / 2) { |
| 987 | top += mSlideRange * mAnchorPoint; |
| 988 | } |
| 989 | |
| 990 | } else if (yvel > 0 || (yvel == 0 && mSlideOffset > 0.5f)) { |
| 991 | top += mSlideRange; |
| 992 | } |
| 993 | |
| 994 | mDragHelper.settleCapturedViewAt(releasedChild.getLeft(), top); |
| 995 | invalidate(); |
| 996 | } |
| 997 | |
| 998 | @Override |
| 999 | public int getViewVerticalDragRange(View child) { |
| 1000 | return mSlideRange; |
| 1001 | } |
| 1002 | |
| 1003 | @Override |
| 1004 | public int clampViewPositionVertical(View child, int top, int dy) { |
| 1005 | final int topBound = getPaddingTop(); |
| 1006 | final int bottomBound = topBound + mSlideRange; |
| 1007 | |
| 1008 | final int newLeft = Math.min(Math.max(top, topBound), bottomBound); |
| 1009 | |
| 1010 | return newLeft; |
| 1011 | } |
| 1012 | |
| 1013 | } |
| 1014 | |
| 1015 | public static class LayoutParams extends ViewGroup.MarginLayoutParams { |
| 1016 | private static final int[] ATTRS = new int[] { android.R.attr.layout_weight }; |
| 1017 | |
| 1018 | /** |
| 1019 | * True if this pane is the slideable pane in the layout. |
| 1020 | */ |
| 1021 | boolean slideable; |
| 1022 | |
| 1023 | /** |
| 1024 | * True if this view should be drawn dimmed when it's been offset from its default position. |
| 1025 | */ |
| 1026 | boolean dimWhenOffset; |
| 1027 | |
| 1028 | Paint dimPaint; |
| 1029 | |
| 1030 | public LayoutParams() { |
| 1031 | super(MATCH_PARENT, MATCH_PARENT); |
| 1032 | } |
| 1033 | |
| 1034 | public LayoutParams(int width, int height) { |
| 1035 | super(width, height); |
| 1036 | } |
| 1037 | |
| 1038 | public LayoutParams(android.view.ViewGroup.LayoutParams source) { |
| 1039 | super(source); |
| 1040 | } |
| 1041 | |
| 1042 | public LayoutParams(MarginLayoutParams source) { |
| 1043 | super(source); |
| 1044 | } |
| 1045 | |
| 1046 | public LayoutParams(LayoutParams source) { |
| 1047 | super(source); |
| 1048 | } |
| 1049 | |
| 1050 | public LayoutParams(Context c, AttributeSet attrs) { |
| 1051 | super(c, attrs); |
| 1052 | |
| 1053 | final TypedArray a = c.obtainStyledAttributes(attrs, ATTRS); |
| 1054 | a.recycle(); |
| 1055 | } |
| 1056 | |
| 1057 | } |
| 1058 | |
| 1059 | static class SavedState extends BaseSavedState { |
| 1060 | boolean isExpanded; |
| 1061 | |
| 1062 | SavedState(Parcelable superState) { |
| 1063 | super(superState); |
| 1064 | } |
| 1065 | |
| 1066 | private SavedState(Parcel in) { |
| 1067 | super(in); |
| 1068 | isExpanded = in.readInt() != 0; |
| 1069 | } |
| 1070 | |
| 1071 | @Override |
| 1072 | public void writeToParcel(Parcel out, int flags) { |
| 1073 | super.writeToParcel(out, flags); |
| 1074 | out.writeInt(isExpanded ? 1 : 0); |
| 1075 | } |
| 1076 | |
| 1077 | public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() { |
| 1078 | @Override |
| 1079 | public SavedState createFromParcel(Parcel in) { |
| 1080 | return new SavedState(in); |
| 1081 | } |
| 1082 | |
| 1083 | @Override |
| 1084 | public SavedState[] newArray(int size) { |
| 1085 | return new SavedState[size]; |
| 1086 | } |
| 1087 | }; |
| 1088 | } |
| 1089 | } |