Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License |
| 15 | */ |
| 16 | |
| 17 | package com.android.systemui.statusbar.stack; |
| 18 | |
| 19 | import android.content.Context; |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 20 | import android.util.Log; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 21 | import android.view.View; |
| 22 | import android.view.ViewGroup; |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 23 | |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 24 | import com.android.systemui.R; |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 25 | import com.android.systemui.statusbar.ExpandableNotificationRow; |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 26 | import com.android.systemui.statusbar.ExpandableView; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 27 | |
Jorim Jaggi | d4a5744 | 2014-04-10 02:45:55 +0200 | [diff] [blame] | 28 | import java.util.ArrayList; |
| 29 | |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 30 | /** |
| 31 | * The Algorithm of the {@link com.android.systemui.statusbar.stack |
| 32 | * .NotificationStackScrollLayout} which can be queried for {@link com.android.systemui.statusbar |
| 33 | * .stack.StackScrollState} |
| 34 | */ |
| 35 | public class StackScrollAlgorithm { |
| 36 | |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 37 | private static final String LOG_TAG = "StackScrollAlgorithm"; |
| 38 | |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 39 | private static final int MAX_ITEMS_IN_BOTTOM_STACK = 3; |
| 40 | private static final int MAX_ITEMS_IN_TOP_STACK = 3; |
| 41 | |
Jorim Jaggi | d552d9d | 2014-05-07 19:41:13 +0200 | [diff] [blame] | 42 | /** When a child is activated, the other cards' alpha fade to this value. */ |
| 43 | private static final float ACTIVATED_INVERSE_ALPHA = 0.9f; |
| 44 | private static final float DIMMED_SCALE = 0.95f; |
| 45 | |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 46 | private int mPaddingBetweenElements; |
| 47 | private int mCollapsedSize; |
| 48 | private int mTopStackPeekSize; |
| 49 | private int mBottomStackPeekSize; |
| 50 | private int mZDistanceBetweenElements; |
| 51 | private int mZBasicHeight; |
Selim Cinek | 708a6c1 | 2014-05-28 14:16:02 +0200 | [diff] [blame] | 52 | private int mRoundedRectCornerRadius; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 53 | |
| 54 | private StackIndentationFunctor mTopStackIndentationFunctor; |
| 55 | private StackIndentationFunctor mBottomStackIndentationFunctor; |
| 56 | |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 57 | private int mLayoutHeight; |
Jorim Jaggi | 8c1a44b | 2014-04-29 19:04:02 +0200 | [diff] [blame] | 58 | |
| 59 | /** mLayoutHeight - mTopPadding */ |
| 60 | private int mInnerHeight; |
| 61 | private int mTopPadding; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 62 | private StackScrollAlgorithmState mTempAlgorithmState = new StackScrollAlgorithmState(); |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 63 | private boolean mIsExpansionChanging; |
| 64 | private int mFirstChildMaxHeight; |
| 65 | private boolean mIsExpanded; |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 66 | private ExpandableView mFirstChildWhileExpanding; |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 67 | private boolean mExpandedOnStart; |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 68 | private int mTopStackTotalSize; |
Selim Cinek | 34c0a8d | 2014-05-12 00:01:43 +0200 | [diff] [blame] | 69 | private int mPaddingBetweenElementsDimmed; |
| 70 | private int mPaddingBetweenElementsNormal; |
| 71 | private int mBottomStackSlowDownLength; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 72 | |
| 73 | public StackScrollAlgorithm(Context context) { |
| 74 | initConstants(context); |
Selim Cinek | 34c0a8d | 2014-05-12 00:01:43 +0200 | [diff] [blame] | 75 | updatePadding(false); |
| 76 | } |
| 77 | |
| 78 | private void updatePadding(boolean dimmed) { |
| 79 | mPaddingBetweenElements = dimmed |
| 80 | ? mPaddingBetweenElementsDimmed |
| 81 | : mPaddingBetweenElementsNormal; |
| 82 | mTopStackTotalSize = mCollapsedSize + mPaddingBetweenElements; |
| 83 | mTopStackIndentationFunctor = new PiecewiseLinearIndentationFunctor( |
| 84 | MAX_ITEMS_IN_TOP_STACK, |
| 85 | mTopStackPeekSize, |
Selim Cinek | b96924d | 2014-05-12 15:11:25 +0200 | [diff] [blame] | 86 | mTopStackTotalSize - mTopStackPeekSize, |
Selim Cinek | 34c0a8d | 2014-05-12 00:01:43 +0200 | [diff] [blame] | 87 | 0.5f); |
| 88 | mBottomStackIndentationFunctor = new PiecewiseLinearIndentationFunctor( |
| 89 | MAX_ITEMS_IN_BOTTOM_STACK, |
| 90 | mBottomStackPeekSize, |
| 91 | getBottomStackSlowDownLength(), |
| 92 | 0.5f); |
| 93 | } |
| 94 | |
| 95 | public int getBottomStackSlowDownLength() { |
| 96 | return mBottomStackSlowDownLength + mPaddingBetweenElements; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | private void initConstants(Context context) { |
Selim Cinek | 34c0a8d | 2014-05-12 00:01:43 +0200 | [diff] [blame] | 100 | mPaddingBetweenElementsDimmed = context.getResources() |
| 101 | .getDimensionPixelSize(R.dimen.notification_padding_dimmed); |
| 102 | mPaddingBetweenElementsNormal = context.getResources() |
Jorim Jaggi | fe40f7d | 2014-04-28 15:20:04 +0200 | [diff] [blame] | 103 | .getDimensionPixelSize(R.dimen.notification_padding); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 104 | mCollapsedSize = context.getResources() |
Jorim Jaggi | fe40f7d | 2014-04-28 15:20:04 +0200 | [diff] [blame] | 105 | .getDimensionPixelSize(R.dimen.notification_min_height); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 106 | mTopStackPeekSize = context.getResources() |
| 107 | .getDimensionPixelSize(R.dimen.top_stack_peek_amount); |
| 108 | mBottomStackPeekSize = context.getResources() |
| 109 | .getDimensionPixelSize(R.dimen.bottom_stack_peek_amount); |
| 110 | mZDistanceBetweenElements = context.getResources() |
| 111 | .getDimensionPixelSize(R.dimen.z_distance_between_notifications); |
| 112 | mZBasicHeight = (MAX_ITEMS_IN_BOTTOM_STACK + 1) * mZDistanceBetweenElements; |
Selim Cinek | 34c0a8d | 2014-05-12 00:01:43 +0200 | [diff] [blame] | 113 | mBottomStackSlowDownLength = context.getResources() |
| 114 | .getDimensionPixelSize(R.dimen.bottom_stack_slow_down_length); |
Selim Cinek | 708a6c1 | 2014-05-28 14:16:02 +0200 | [diff] [blame] | 115 | mRoundedRectCornerRadius = context.getResources().getDimensionPixelSize( |
Alan Viverette | 3cb07a46 | 2014-06-06 14:19:53 -0700 | [diff] [blame] | 116 | com.android.internal.R.dimen.notification_material_rounded_rect_radius); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | |
Jorim Jaggi | d552d9d | 2014-05-07 19:41:13 +0200 | [diff] [blame] | 120 | public void getStackScrollState(AmbientState ambientState, StackScrollState resultState) { |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 121 | // The state of the local variables are saved in an algorithmState to easily subdivide it |
| 122 | // into multiple phases. |
| 123 | StackScrollAlgorithmState algorithmState = mTempAlgorithmState; |
| 124 | |
| 125 | // First we reset the view states to their default values. |
| 126 | resultState.resetViewStates(); |
| 127 | |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 128 | algorithmState.itemsInTopStack = 0.0f; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 129 | algorithmState.partialInTop = 0.0f; |
| 130 | algorithmState.lastTopStackIndex = 0; |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 131 | algorithmState.scrolledPixelsTop = 0; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 132 | algorithmState.itemsInBottomStack = 0.0f; |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 133 | algorithmState.partialInBottom = 0.0f; |
Selim Cinek | 8d9ff9c | 2014-05-12 15:13:04 +0200 | [diff] [blame] | 134 | float bottomOverScroll = ambientState.getOverScrollAmount(false /* onTop */); |
Selim Cinek | 1408eb5 | 2014-06-02 14:45:38 +0200 | [diff] [blame] | 135 | |
| 136 | int scrollY = ambientState.getScrollY(); |
| 137 | |
| 138 | // Due to the overScroller, the stackscroller can have negative scroll state. This is |
| 139 | // already accounted for by the top padding and doesn't need an additional adaption |
| 140 | scrollY = Math.max(0, scrollY); |
| 141 | algorithmState.scrollY = (int) (scrollY + mCollapsedSize + bottomOverScroll); |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 142 | |
Jorim Jaggi | d4a5744 | 2014-04-10 02:45:55 +0200 | [diff] [blame] | 143 | updateVisibleChildren(resultState, algorithmState); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 144 | |
| 145 | // Phase 1: |
| 146 | findNumberOfItemsInTopStackAndUpdateState(resultState, algorithmState); |
| 147 | |
| 148 | // Phase 2: |
| 149 | updatePositionsForState(resultState, algorithmState); |
| 150 | |
| 151 | // Phase 3: |
| 152 | updateZValuesForState(resultState, algorithmState); |
Selim Cinek | eb97356 | 2014-05-02 17:07:49 +0200 | [diff] [blame] | 153 | |
Jorim Jaggi | d552d9d | 2014-05-07 19:41:13 +0200 | [diff] [blame] | 154 | handleDraggedViews(ambientState, resultState, algorithmState); |
| 155 | updateDimmedActivated(ambientState, resultState, algorithmState); |
Selim Cinek | 708a6c1 | 2014-05-28 14:16:02 +0200 | [diff] [blame] | 156 | updateClipping(resultState, algorithmState); |
Selim Cinek | f54090e | 2014-06-17 17:24:51 -0700 | [diff] [blame] | 157 | updateScrimAmount(resultState, algorithmState, ambientState.getScrimAmount()); |
| 158 | } |
| 159 | |
| 160 | private void updateScrimAmount(StackScrollState resultState, |
| 161 | StackScrollAlgorithmState algorithmState, float scrimAmount) { |
| 162 | int childCount = algorithmState.visibleChildren.size(); |
| 163 | for (int i = 0; i < childCount; i++) { |
| 164 | View child = algorithmState.visibleChildren.get(i); |
| 165 | StackScrollState.ViewState childViewState = resultState.getViewStateForView(child); |
| 166 | childViewState.scrimAmount = scrimAmount; |
| 167 | } |
Selim Cinek | 708a6c1 | 2014-05-28 14:16:02 +0200 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | private void updateClipping(StackScrollState resultState, |
| 171 | StackScrollAlgorithmState algorithmState) { |
| 172 | float previousNotificationEnd = 0; |
| 173 | float previousNotificationStart = 0; |
| 174 | boolean previousNotificationIsSwiped = false; |
| 175 | int childCount = algorithmState.visibleChildren.size(); |
| 176 | for (int i = 0; i < childCount; i++) { |
| 177 | ExpandableView child = algorithmState.visibleChildren.get(i); |
| 178 | StackScrollState.ViewState state = resultState.getViewStateForView(child); |
| 179 | float newYTranslation = state.yTranslation; |
| 180 | int newHeight = state.height; |
| 181 | // apply clipping and shadow |
| 182 | float newNotificationEnd = newYTranslation + newHeight; |
| 183 | |
| 184 | // In the unlocked shade we have to clip a little bit higher because of the rounded |
| 185 | // corners of the notifications. |
| 186 | float clippingCorrection = state.dimmed ? 0 : mRoundedRectCornerRadius; |
| 187 | |
| 188 | // When the previous notification is swiped, we don't clip the content to the |
| 189 | // bottom of it. |
| 190 | float clipHeight = previousNotificationIsSwiped |
| 191 | ? newHeight |
| 192 | : newNotificationEnd - (previousNotificationEnd - clippingCorrection); |
| 193 | |
| 194 | updateChildClippingAndBackground(state, newHeight, clipHeight, |
| 195 | (int) (newHeight - (previousNotificationStart - newYTranslation))); |
| 196 | |
| 197 | if (!child.isTransparent()) { |
| 198 | // Only update the previous values if we are not transparent, |
| 199 | // otherwise we would clip to a transparent view. |
Selim Cinek | e299793 | 2014-06-12 18:55:07 +0200 | [diff] [blame] | 200 | previousNotificationStart = newYTranslation + state.clipTopAmount; |
Selim Cinek | 708a6c1 | 2014-05-28 14:16:02 +0200 | [diff] [blame] | 201 | previousNotificationEnd = newNotificationEnd; |
| 202 | previousNotificationIsSwiped = child.getTranslationX() != 0; |
| 203 | } |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * Updates the shadow outline and the clipping for a view. |
| 209 | * |
| 210 | * @param state the viewState to update |
| 211 | * @param realHeight the currently applied height of the view |
| 212 | * @param clipHeight the desired clip height, the rest of the view will be clipped from the top |
| 213 | * @param backgroundHeight the desired background height. The shadows of the view will be |
| 214 | * based on this height and the content will be clipped from the top |
| 215 | */ |
| 216 | private void updateChildClippingAndBackground(StackScrollState.ViewState state, int realHeight, |
| 217 | float clipHeight, int backgroundHeight) { |
| 218 | if (realHeight > clipHeight) { |
| 219 | state.topOverLap = (int) (realHeight - clipHeight); |
| 220 | } else { |
| 221 | state.topOverLap = 0; |
| 222 | } |
| 223 | if (realHeight > backgroundHeight) { |
| 224 | state.clipTopAmount = (realHeight - backgroundHeight); |
| 225 | } else { |
| 226 | state.clipTopAmount = 0; |
| 227 | } |
Jorim Jaggi | d552d9d | 2014-05-07 19:41:13 +0200 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Updates the dimmed and activated states of the children. |
| 232 | */ |
| 233 | private void updateDimmedActivated(AmbientState ambientState, StackScrollState resultState, |
| 234 | StackScrollAlgorithmState algorithmState) { |
| 235 | boolean dimmed = ambientState.isDimmed(); |
John Spurlock | bf37099 | 2014-06-17 13:58:31 -0400 | [diff] [blame^] | 236 | boolean dark = ambientState.isDark(); |
Jorim Jaggi | d552d9d | 2014-05-07 19:41:13 +0200 | [diff] [blame] | 237 | View activatedChild = ambientState.getActivatedChild(); |
| 238 | int childCount = algorithmState.visibleChildren.size(); |
| 239 | for (int i = 0; i < childCount; i++) { |
| 240 | View child = algorithmState.visibleChildren.get(i); |
| 241 | StackScrollState.ViewState childViewState = resultState.getViewStateForView(child); |
| 242 | childViewState.dimmed = dimmed; |
John Spurlock | bf37099 | 2014-06-17 13:58:31 -0400 | [diff] [blame^] | 243 | childViewState.dark = dark; |
Selim Cinek | b89de4e | 2014-06-10 10:47:05 +0200 | [diff] [blame] | 244 | boolean isActivatedChild = activatedChild == child; |
| 245 | childViewState.scale = !dimmed || isActivatedChild |
Jorim Jaggi | d552d9d | 2014-05-07 19:41:13 +0200 | [diff] [blame] | 246 | ? 1.0f |
| 247 | : DIMMED_SCALE; |
Selim Cinek | b89de4e | 2014-06-10 10:47:05 +0200 | [diff] [blame] | 248 | if (dimmed && activatedChild != null) { |
| 249 | if (!isActivatedChild) { |
| 250 | childViewState.alpha *= ACTIVATED_INVERSE_ALPHA; |
| 251 | } else { |
| 252 | childViewState.zTranslation += 2.0f * mZDistanceBetweenElements; |
| 253 | } |
Jorim Jaggi | d552d9d | 2014-05-07 19:41:13 +0200 | [diff] [blame] | 254 | } |
| 255 | } |
Selim Cinek | eb97356 | 2014-05-02 17:07:49 +0200 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | /** |
| 259 | * Handle the special state when views are being dragged |
| 260 | */ |
Jorim Jaggi | d552d9d | 2014-05-07 19:41:13 +0200 | [diff] [blame] | 261 | private void handleDraggedViews(AmbientState ambientState, StackScrollState resultState, |
Selim Cinek | eb97356 | 2014-05-02 17:07:49 +0200 | [diff] [blame] | 262 | StackScrollAlgorithmState algorithmState) { |
Jorim Jaggi | d552d9d | 2014-05-07 19:41:13 +0200 | [diff] [blame] | 263 | ArrayList<View> draggedViews = ambientState.getDraggedViews(); |
| 264 | for (View draggedView : draggedViews) { |
Selim Cinek | eb97356 | 2014-05-02 17:07:49 +0200 | [diff] [blame] | 265 | int childIndex = algorithmState.visibleChildren.indexOf(draggedView); |
| 266 | if (childIndex >= 0 && childIndex < algorithmState.visibleChildren.size() - 1) { |
| 267 | View nextChild = algorithmState.visibleChildren.get(childIndex + 1); |
Jorim Jaggi | d552d9d | 2014-05-07 19:41:13 +0200 | [diff] [blame] | 268 | if (!draggedViews.contains(nextChild)) { |
Selim Cinek | eb97356 | 2014-05-02 17:07:49 +0200 | [diff] [blame] | 269 | // only if the view is not dragged itself we modify its state to be fully |
| 270 | // visible |
| 271 | StackScrollState.ViewState viewState = resultState.getViewStateForView( |
| 272 | nextChild); |
| 273 | // The child below the dragged one must be fully visible |
| 274 | viewState.alpha = 1; |
| 275 | } |
| 276 | |
| 277 | // Lets set the alpha to the one it currently has, as its currently being dragged |
| 278 | StackScrollState.ViewState viewState = resultState.getViewStateForView(draggedView); |
| 279 | // The dragged child should keep the set alpha |
| 280 | viewState.alpha = draggedView.getAlpha(); |
| 281 | } |
| 282 | } |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 283 | } |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 284 | |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 285 | /** |
Jorim Jaggi | d4a5744 | 2014-04-10 02:45:55 +0200 | [diff] [blame] | 286 | * Update the visible children on the state. |
| 287 | */ |
| 288 | private void updateVisibleChildren(StackScrollState resultState, |
| 289 | StackScrollAlgorithmState state) { |
| 290 | ViewGroup hostView = resultState.getHostView(); |
| 291 | int childCount = hostView.getChildCount(); |
| 292 | state.visibleChildren.clear(); |
| 293 | state.visibleChildren.ensureCapacity(childCount); |
| 294 | for (int i = 0; i < childCount; i++) { |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 295 | ExpandableView v = (ExpandableView) hostView.getChildAt(i); |
Jorim Jaggi | d4a5744 | 2014-04-10 02:45:55 +0200 | [diff] [blame] | 296 | if (v.getVisibility() != View.GONE) { |
Selim Cinek | 8efa6dd | 2014-05-19 16:27:37 +0200 | [diff] [blame] | 297 | StackScrollState.ViewState viewState = resultState.getViewStateForView(v); |
| 298 | viewState.notGoneIndex = state.visibleChildren.size(); |
Jorim Jaggi | d4a5744 | 2014-04-10 02:45:55 +0200 | [diff] [blame] | 299 | state.visibleChildren.add(v); |
| 300 | } |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | /** |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 305 | * Determine the positions for the views. This is the main part of the algorithm. |
| 306 | * |
| 307 | * @param resultState The result state to update if a change to the properties of a child occurs |
| 308 | * @param algorithmState The state in which the current pass of the algorithm is currently in |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 309 | */ |
| 310 | private void updatePositionsForState(StackScrollState resultState, |
| 311 | StackScrollAlgorithmState algorithmState) { |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 312 | |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 313 | // The starting position of the bottom stack peek |
Jorim Jaggi | 8c1a44b | 2014-04-29 19:04:02 +0200 | [diff] [blame] | 314 | float bottomPeekStart = mInnerHeight - mBottomStackPeekSize; |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 315 | |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 316 | // The position where the bottom stack starts. |
Selim Cinek | 34c0a8d | 2014-05-12 00:01:43 +0200 | [diff] [blame] | 317 | float bottomStackStart = bottomPeekStart - mBottomStackSlowDownLength; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 318 | |
| 319 | // The y coordinate of the current child. |
| 320 | float currentYPosition = 0.0f; |
| 321 | |
| 322 | // How far in is the element currently transitioning into the bottom stack. |
| 323 | float yPositionInScrollView = 0.0f; |
| 324 | |
Jorim Jaggi | d4a5744 | 2014-04-10 02:45:55 +0200 | [diff] [blame] | 325 | int childCount = algorithmState.visibleChildren.size(); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 326 | int numberOfElementsCompletelyIn = (int) algorithmState.itemsInTopStack; |
| 327 | for (int i = 0; i < childCount; i++) { |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 328 | ExpandableView child = algorithmState.visibleChildren.get(i); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 329 | StackScrollState.ViewState childViewState = resultState.getViewStateForView(child); |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 330 | childViewState.location = StackScrollState.ViewState.LOCATION_UNKNOWN; |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 331 | int childHeight = getMaxAllowedChildHeight(child); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 332 | float yPositionInScrollViewAfterElement = yPositionInScrollView |
| 333 | + childHeight |
| 334 | + mPaddingBetweenElements; |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 335 | float scrollOffset = yPositionInScrollView - algorithmState.scrollY + mCollapsedSize; |
| 336 | |
| 337 | if (i == algorithmState.lastTopStackIndex + 1) { |
| 338 | // Normally the position of this child is the position in the regular scrollview, |
| 339 | // but if the two stacks are very close to each other, |
| 340 | // then have have to push it even more upwards to the position of the bottom |
| 341 | // stack start. |
| 342 | currentYPosition = Math.min(scrollOffset, bottomStackStart); |
| 343 | } |
| 344 | childViewState.yTranslation = currentYPosition; |
| 345 | |
| 346 | // The y position after this element |
| 347 | float nextYPosition = currentYPosition + childHeight + |
| 348 | mPaddingBetweenElements; |
| 349 | |
| 350 | if (i <= algorithmState.lastTopStackIndex) { |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 351 | // Case 1: |
| 352 | // We are in the top Stack |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 353 | updateStateForTopStackChild(algorithmState, |
| 354 | numberOfElementsCompletelyIn, i, childHeight, childViewState, scrollOffset); |
| 355 | clampYTranslation(childViewState, childHeight); |
| 356 | // check if we are overlapping with the bottom stack |
| 357 | if (childViewState.yTranslation + childHeight + mPaddingBetweenElements |
Selim Cinek | 4a1ac84 | 2014-05-01 15:51:58 +0200 | [diff] [blame] | 358 | >= bottomStackStart && !mIsExpansionChanging && i != 0) { |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 359 | // TODO: handle overlapping sizes with end stack better |
| 360 | // we just collapse this element |
| 361 | childViewState.height = mCollapsedSize; |
| 362 | } |
| 363 | } else if (nextYPosition >= bottomStackStart) { |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 364 | // Case 2: |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 365 | // We are in the bottom stack. |
| 366 | if (currentYPosition >= bottomStackStart) { |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 367 | // According to the regular scroll view we are fully translated out of the |
| 368 | // bottom of the screen so we are fully in the bottom stack |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 369 | updateStateForChildFullyInBottomStack(algorithmState, |
| 370 | bottomStackStart, childViewState, childHeight); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 371 | } else { |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 372 | // According to the regular scroll view we are currently translating out of / |
| 373 | // into the bottom of the screen |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 374 | updateStateForChildTransitioningInBottom(algorithmState, |
| 375 | bottomStackStart, bottomPeekStart, currentYPosition, |
| 376 | childViewState, childHeight); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 377 | } |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 378 | } else { |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 379 | // Case 3: |
| 380 | // We are in the regular scroll area. |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 381 | childViewState.location = StackScrollState.ViewState.LOCATION_MAIN_AREA; |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 382 | clampYTranslation(childViewState, childHeight); |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 383 | } |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 384 | |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 385 | // The first card is always rendered. |
| 386 | if (i == 0) { |
| 387 | childViewState.alpha = 1.0f; |
Selim Cinek | 8d9ff9c | 2014-05-12 15:13:04 +0200 | [diff] [blame] | 388 | childViewState.yTranslation = Math.max(mCollapsedSize - algorithmState.scrollY, 0); |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 389 | childViewState.location = StackScrollState.ViewState.LOCATION_FIRST_CARD; |
| 390 | } |
| 391 | if (childViewState.location == StackScrollState.ViewState.LOCATION_UNKNOWN) { |
| 392 | Log.wtf(LOG_TAG, "Failed to assign location for child " + i); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 393 | } |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 394 | currentYPosition = childViewState.yTranslation + childHeight + mPaddingBetweenElements; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 395 | yPositionInScrollView = yPositionInScrollViewAfterElement; |
Jorim Jaggi | 8c1a44b | 2014-04-29 19:04:02 +0200 | [diff] [blame] | 396 | |
| 397 | childViewState.yTranslation += mTopPadding; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 398 | } |
| 399 | } |
| 400 | |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 401 | /** |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 402 | * Clamp the yTranslation both up and down to valid positions. |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 403 | * |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 404 | * @param childViewState the view state of the child |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 405 | * @param childHeight the height of this child |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 406 | */ |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 407 | private void clampYTranslation(StackScrollState.ViewState childViewState, int childHeight) { |
| 408 | clampPositionToBottomStackStart(childViewState, childHeight); |
| 409 | clampPositionToTopStackEnd(childViewState, childHeight); |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * Clamp the yTranslation of the child down such that its end is at most on the beginning of |
| 414 | * the bottom stack. |
| 415 | * |
| 416 | * @param childViewState the view state of the child |
| 417 | * @param childHeight the height of this child |
| 418 | */ |
| 419 | private void clampPositionToBottomStackStart(StackScrollState.ViewState childViewState, |
| 420 | int childHeight) { |
| 421 | childViewState.yTranslation = Math.min(childViewState.yTranslation, |
Jorim Jaggi | 8c1a44b | 2014-04-29 19:04:02 +0200 | [diff] [blame] | 422 | mInnerHeight - mBottomStackPeekSize - childHeight); |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | /** |
| 426 | * Clamp the yTranslation of the child up such that its end is at lest on the end of the top |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 427 | * stack.get |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 428 | * |
| 429 | * @param childViewState the view state of the child |
| 430 | * @param childHeight the height of this child |
| 431 | */ |
| 432 | private void clampPositionToTopStackEnd(StackScrollState.ViewState childViewState, |
| 433 | int childHeight) { |
| 434 | childViewState.yTranslation = Math.max(childViewState.yTranslation, |
| 435 | mCollapsedSize - childHeight); |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 436 | } |
| 437 | |
| 438 | private int getMaxAllowedChildHeight(View child) { |
| 439 | if (child instanceof ExpandableNotificationRow) { |
| 440 | ExpandableNotificationRow row = (ExpandableNotificationRow) child; |
Jorim Jaggi | 9cbadd3 | 2014-05-01 20:18:31 +0200 | [diff] [blame] | 441 | return row.getIntrinsicHeight(); |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 442 | } else if (child instanceof ExpandableView) { |
| 443 | ExpandableView expandableView = (ExpandableView) child; |
| 444 | return expandableView.getActualHeight(); |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 445 | } |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 446 | return child == null? mCollapsedSize : child.getHeight(); |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 447 | } |
| 448 | |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 449 | private void updateStateForChildTransitioningInBottom(StackScrollAlgorithmState algorithmState, |
| 450 | float transitioningPositionStart, float bottomPeakStart, float currentYPosition, |
| 451 | StackScrollState.ViewState childViewState, int childHeight) { |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 452 | |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 453 | // This is the transitioning element on top of bottom stack, calculate how far we are in. |
| 454 | algorithmState.partialInBottom = 1.0f - ( |
| 455 | (transitioningPositionStart - currentYPosition) / (childHeight + |
| 456 | mPaddingBetweenElements)); |
| 457 | |
| 458 | // the offset starting at the transitionPosition of the bottom stack |
| 459 | float offset = mBottomStackIndentationFunctor.getValue(algorithmState.partialInBottom); |
| 460 | algorithmState.itemsInBottomStack += algorithmState.partialInBottom; |
Jorim Jaggi | fe40f7d | 2014-04-28 15:20:04 +0200 | [diff] [blame] | 461 | childViewState.yTranslation = transitioningPositionStart + offset - childHeight |
| 462 | - mPaddingBetweenElements; |
Selim Cinek | 34c0a8d | 2014-05-12 00:01:43 +0200 | [diff] [blame] | 463 | |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 464 | // We want at least to be at the end of the top stack when collapsing |
| 465 | clampPositionToTopStackEnd(childViewState, childHeight); |
| 466 | childViewState.location = StackScrollState.ViewState.LOCATION_MAIN_AREA; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 467 | } |
| 468 | |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 469 | private void updateStateForChildFullyInBottomStack(StackScrollAlgorithmState algorithmState, |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 470 | float transitioningPositionStart, StackScrollState.ViewState childViewState, |
| 471 | int childHeight) { |
| 472 | |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 473 | float currentYPosition; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 474 | algorithmState.itemsInBottomStack += 1.0f; |
| 475 | if (algorithmState.itemsInBottomStack < MAX_ITEMS_IN_BOTTOM_STACK) { |
| 476 | // We are visually entering the bottom stack |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 477 | currentYPosition = transitioningPositionStart |
Jorim Jaggi | fe40f7d | 2014-04-28 15:20:04 +0200 | [diff] [blame] | 478 | + mBottomStackIndentationFunctor.getValue(algorithmState.itemsInBottomStack) |
| 479 | - mPaddingBetweenElements; |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 480 | childViewState.location = StackScrollState.ViewState.LOCATION_BOTTOM_STACK_PEEKING; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 481 | } else { |
| 482 | // we are fully inside the stack |
| 483 | if (algorithmState.itemsInBottomStack > MAX_ITEMS_IN_BOTTOM_STACK + 2) { |
| 484 | childViewState.alpha = 0.0f; |
| 485 | } else if (algorithmState.itemsInBottomStack |
| 486 | > MAX_ITEMS_IN_BOTTOM_STACK + 1) { |
| 487 | childViewState.alpha = 1.0f - algorithmState.partialInBottom; |
| 488 | } |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 489 | childViewState.location = StackScrollState.ViewState.LOCATION_BOTTOM_STACK_HIDDEN; |
Jorim Jaggi | 8c1a44b | 2014-04-29 19:04:02 +0200 | [diff] [blame] | 490 | currentYPosition = mInnerHeight; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 491 | } |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 492 | childViewState.yTranslation = currentYPosition - childHeight; |
| 493 | clampPositionToTopStackEnd(childViewState, childHeight); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 494 | } |
| 495 | |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 496 | private void updateStateForTopStackChild(StackScrollAlgorithmState algorithmState, |
| 497 | int numberOfElementsCompletelyIn, int i, int childHeight, |
| 498 | StackScrollState.ViewState childViewState, float scrollOffset) { |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 499 | |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 500 | |
| 501 | // First we calculate the index relative to the current stack window of size at most |
| 502 | // {@link #MAX_ITEMS_IN_TOP_STACK} |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 503 | int paddedIndex = i - 1 |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 504 | - Math.max(numberOfElementsCompletelyIn - MAX_ITEMS_IN_TOP_STACK, 0); |
| 505 | if (paddedIndex >= 0) { |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 506 | |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 507 | // We are currently visually entering the top stack |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 508 | float distanceToStack = childHeight - algorithmState.scrolledPixelsTop; |
| 509 | if (i == algorithmState.lastTopStackIndex && distanceToStack > mTopStackTotalSize) { |
| 510 | |
| 511 | // Child is currently translating into stack but not yet inside slow down zone. |
| 512 | // Handle it like the regular scrollview. |
| 513 | childViewState.yTranslation = scrollOffset; |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 514 | } else { |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 515 | // Apply stacking logic. |
| 516 | float numItemsBefore; |
| 517 | if (i == algorithmState.lastTopStackIndex) { |
| 518 | numItemsBefore = 1.0f - (distanceToStack / mTopStackTotalSize); |
| 519 | } else { |
| 520 | numItemsBefore = algorithmState.itemsInTopStack - i; |
| 521 | } |
| 522 | // The end position of the current child |
| 523 | float currentChildEndY = mCollapsedSize + mTopStackTotalSize - |
| 524 | mTopStackIndentationFunctor.getValue(numItemsBefore); |
| 525 | childViewState.yTranslation = currentChildEndY - childHeight; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 526 | } |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 527 | childViewState.location = StackScrollState.ViewState.LOCATION_TOP_STACK_PEEKING; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 528 | } else { |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 529 | if (paddedIndex == -1) { |
| 530 | childViewState.alpha = 1.0f - algorithmState.partialInTop; |
| 531 | } else { |
| 532 | // We are hidden behind the top card and faded out, so we can hide ourselves. |
| 533 | childViewState.alpha = 0.0f; |
| 534 | } |
| 535 | childViewState.yTranslation = mCollapsedSize - childHeight; |
Christoph Studer | 6e3eceb | 2014-04-01 18:40:27 +0200 | [diff] [blame] | 536 | childViewState.location = StackScrollState.ViewState.LOCATION_TOP_STACK_HIDDEN; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 537 | } |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 538 | |
| 539 | |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 540 | } |
| 541 | |
| 542 | /** |
| 543 | * Find the number of items in the top stack and update the result state if needed. |
| 544 | * |
| 545 | * @param resultState The result state to update if a height change of an child occurs |
| 546 | * @param algorithmState The state in which the current pass of the algorithm is currently in |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 547 | */ |
| 548 | private void findNumberOfItemsInTopStackAndUpdateState(StackScrollState resultState, |
| 549 | StackScrollAlgorithmState algorithmState) { |
| 550 | |
| 551 | // The y Position if the element would be in a regular scrollView |
| 552 | float yPositionInScrollView = 0.0f; |
Jorim Jaggi | d4a5744 | 2014-04-10 02:45:55 +0200 | [diff] [blame] | 553 | int childCount = algorithmState.visibleChildren.size(); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 554 | |
| 555 | // find the number of elements in the top stack. |
| 556 | for (int i = 0; i < childCount; i++) { |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 557 | ExpandableView child = algorithmState.visibleChildren.get(i); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 558 | StackScrollState.ViewState childViewState = resultState.getViewStateForView(child); |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 559 | int childHeight = getMaxAllowedChildHeight(child); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 560 | float yPositionInScrollViewAfterElement = yPositionInScrollView |
| 561 | + childHeight |
| 562 | + mPaddingBetweenElements; |
| 563 | if (yPositionInScrollView < algorithmState.scrollY) { |
Selim Cinek | 8d9ff9c | 2014-05-12 15:13:04 +0200 | [diff] [blame] | 564 | if (i == 0 && algorithmState.scrollY <= mCollapsedSize) { |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 565 | |
| 566 | // The starting position of the bottom stack peek |
Jorim Jaggi | 8c1a44b | 2014-04-29 19:04:02 +0200 | [diff] [blame] | 567 | int bottomPeekStart = mInnerHeight - mBottomStackPeekSize; |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 568 | // Collapse and expand the first child while the shade is being expanded |
| 569 | float maxHeight = mIsExpansionChanging && child == mFirstChildWhileExpanding |
| 570 | ? mFirstChildMaxHeight |
| 571 | : childHeight; |
| 572 | childViewState.height = (int) Math.max(Math.min(bottomPeekStart, maxHeight), |
| 573 | mCollapsedSize); |
| 574 | algorithmState.itemsInTopStack = 1.0f; |
| 575 | |
| 576 | } else if (yPositionInScrollViewAfterElement < algorithmState.scrollY) { |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 577 | // According to the regular scroll view we are fully off screen |
| 578 | algorithmState.itemsInTopStack += 1.0f; |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 579 | if (i == 0) { |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 580 | childViewState.height = mCollapsedSize; |
| 581 | } |
| 582 | } else { |
| 583 | // According to the regular scroll view we are partially off screen |
| 584 | // If it is expanded we have to collapse it to a new size |
| 585 | float newSize = yPositionInScrollViewAfterElement |
| 586 | - mPaddingBetweenElements |
| 587 | - algorithmState.scrollY; |
| 588 | |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 589 | if (i == 0) { |
| 590 | newSize += mCollapsedSize; |
| 591 | } |
| 592 | |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 593 | // How much did we scroll into this child |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 594 | algorithmState.scrolledPixelsTop = childHeight - newSize; |
| 595 | algorithmState.partialInTop = (algorithmState.scrolledPixelsTop) / (childHeight |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 596 | + mPaddingBetweenElements); |
| 597 | |
| 598 | // Our element can be expanded, so this can get negative |
| 599 | algorithmState.partialInTop = Math.max(0.0f, algorithmState.partialInTop); |
| 600 | algorithmState.itemsInTopStack += algorithmState.partialInTop; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 601 | newSize = Math.max(mCollapsedSize, newSize); |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 602 | if (i == 0) { |
Selim Cinek | 4e456be | 2014-06-12 18:09:43 +0200 | [diff] [blame] | 603 | algorithmState.itemsInTopStack = 1.0f; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 604 | childViewState.height = (int) newSize; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 605 | } |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 606 | algorithmState.lastTopStackIndex = i; |
| 607 | break; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 608 | } |
| 609 | } else { |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 610 | algorithmState.lastTopStackIndex = i - 1; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 611 | // We are already past the stack so we can end the loop |
| 612 | break; |
| 613 | } |
| 614 | yPositionInScrollView = yPositionInScrollViewAfterElement; |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | /** |
| 619 | * Calculate the Z positions for all children based on the number of items in both stacks and |
| 620 | * save it in the resultState |
| 621 | * |
| 622 | * @param resultState The result state to update the zTranslation values |
| 623 | * @param algorithmState The state in which the current pass of the algorithm is currently in |
| 624 | */ |
| 625 | private void updateZValuesForState(StackScrollState resultState, |
| 626 | StackScrollAlgorithmState algorithmState) { |
Jorim Jaggi | d4a5744 | 2014-04-10 02:45:55 +0200 | [diff] [blame] | 627 | int childCount = algorithmState.visibleChildren.size(); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 628 | for (int i = 0; i < childCount; i++) { |
Jorim Jaggi | d4a5744 | 2014-04-10 02:45:55 +0200 | [diff] [blame] | 629 | View child = algorithmState.visibleChildren.get(i); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 630 | StackScrollState.ViewState childViewState = resultState.getViewStateForView(child); |
| 631 | if (i < algorithmState.itemsInTopStack) { |
| 632 | float stackIndex = algorithmState.itemsInTopStack - i; |
| 633 | stackIndex = Math.min(stackIndex, MAX_ITEMS_IN_TOP_STACK + 2); |
Selim Cinek | 4e456be | 2014-06-12 18:09:43 +0200 | [diff] [blame] | 634 | if (i == 0 && algorithmState.itemsInTopStack < 2.0f) { |
| 635 | |
| 636 | // We only have the top item and an additional item in the top stack, |
| 637 | // Interpolate the index from 0 to 2 while the second item is |
| 638 | // translating in. |
| 639 | stackIndex -= 1.0f; |
| 640 | if (algorithmState.scrollY > mCollapsedSize) { |
| 641 | |
| 642 | // Since there is a shadow treshhold, we cant just interpolate from 0 to |
| 643 | // 2 but we interpolate from 0.1f to 2.0f when scrolled in. The jump in |
| 644 | // height will not be noticable since we have padding in between. |
| 645 | stackIndex = 0.1f + stackIndex * 1.9f; |
| 646 | } |
| 647 | } |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 648 | childViewState.zTranslation = mZBasicHeight |
| 649 | + stackIndex * mZDistanceBetweenElements; |
| 650 | } else if (i > (childCount - 1 - algorithmState.itemsInBottomStack)) { |
| 651 | float numItemsAbove = i - (childCount - 1 - algorithmState.itemsInBottomStack); |
| 652 | float translationZ = mZBasicHeight |
| 653 | - numItemsAbove * mZDistanceBetweenElements; |
| 654 | childViewState.zTranslation = translationZ; |
| 655 | } else { |
| 656 | childViewState.zTranslation = mZBasicHeight; |
| 657 | } |
| 658 | } |
| 659 | } |
| 660 | |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 661 | public void setLayoutHeight(int layoutHeight) { |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 662 | this.mLayoutHeight = layoutHeight; |
Jorim Jaggi | 8c1a44b | 2014-04-29 19:04:02 +0200 | [diff] [blame] | 663 | updateInnerHeight(); |
| 664 | } |
| 665 | |
| 666 | public void setTopPadding(int topPadding) { |
| 667 | mTopPadding = topPadding; |
| 668 | updateInnerHeight(); |
| 669 | } |
| 670 | |
| 671 | private void updateInnerHeight() { |
| 672 | mInnerHeight = mLayoutHeight - mTopPadding; |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 673 | } |
| 674 | |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 675 | public void onExpansionStarted(StackScrollState currentState) { |
| 676 | mIsExpansionChanging = true; |
| 677 | mExpandedOnStart = mIsExpanded; |
| 678 | ViewGroup hostView = currentState.getHostView(); |
| 679 | updateFirstChildHeightWhileExpanding(hostView); |
| 680 | } |
| 681 | |
| 682 | private void updateFirstChildHeightWhileExpanding(ViewGroup hostView) { |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 683 | mFirstChildWhileExpanding = (ExpandableView) findFirstVisibleChild(hostView); |
Jorim Jaggi | 9f347ae | 2014-04-11 00:47:18 +0200 | [diff] [blame] | 684 | if (mFirstChildWhileExpanding != null) { |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 685 | if (mExpandedOnStart) { |
| 686 | |
| 687 | // We are collapsing the shade, so the first child can get as most as high as the |
| 688 | // current height. |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 689 | mFirstChildMaxHeight = mFirstChildWhileExpanding.getActualHeight(); |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 690 | } else { |
| 691 | |
| 692 | // We are expanding the shade, expand it to its full height. |
Selim Cinek | 7d44772 | 2014-06-10 15:51:59 +0200 | [diff] [blame] | 693 | if (!isMaxSizeInitialized(mFirstChildWhileExpanding)) { |
Selim Cinek | b6e0e12 | 2014-04-23 17:24:37 +0200 | [diff] [blame] | 694 | |
| 695 | // This child was not layouted yet, wait for a layout pass |
| 696 | mFirstChildWhileExpanding |
| 697 | .addOnLayoutChangeListener(new View.OnLayoutChangeListener() { |
| 698 | @Override |
| 699 | public void onLayoutChange(View v, int left, int top, int right, |
| 700 | int bottom, int oldLeft, int oldTop, int oldRight, |
| 701 | int oldBottom) { |
Selim Cinek | 2ba5f1f | 2014-04-28 20:23:30 +0200 | [diff] [blame] | 702 | if (mFirstChildWhileExpanding != null) { |
| 703 | mFirstChildMaxHeight = getMaxAllowedChildHeight( |
| 704 | mFirstChildWhileExpanding); |
| 705 | } else { |
| 706 | mFirstChildMaxHeight = 0; |
| 707 | } |
| 708 | v.removeOnLayoutChangeListener(this); |
Selim Cinek | b6e0e12 | 2014-04-23 17:24:37 +0200 | [diff] [blame] | 709 | } |
| 710 | }); |
| 711 | } else { |
| 712 | mFirstChildMaxHeight = getMaxAllowedChildHeight(mFirstChildWhileExpanding); |
| 713 | } |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 714 | } |
| 715 | } else { |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 716 | mFirstChildMaxHeight = 0; |
| 717 | } |
| 718 | } |
| 719 | |
Selim Cinek | 7d44772 | 2014-06-10 15:51:59 +0200 | [diff] [blame] | 720 | private boolean isMaxSizeInitialized(ExpandableView child) { |
| 721 | if (child instanceof ExpandableNotificationRow) { |
| 722 | ExpandableNotificationRow row = (ExpandableNotificationRow) child; |
| 723 | return row.isShowingLayoutLayouted(); |
| 724 | } |
| 725 | return child == null || child.getWidth() != 0; |
| 726 | } |
| 727 | |
Jorim Jaggi | 9f347ae | 2014-04-11 00:47:18 +0200 | [diff] [blame] | 728 | private View findFirstVisibleChild(ViewGroup container) { |
| 729 | int childCount = container.getChildCount(); |
| 730 | for (int i = 0; i < childCount; i++) { |
| 731 | View child = container.getChildAt(i); |
| 732 | if (child.getVisibility() != View.GONE) { |
| 733 | return child; |
| 734 | } |
| 735 | } |
| 736 | return null; |
| 737 | } |
| 738 | |
Selim Cinek | 1685e63 | 2014-04-08 02:27:49 +0200 | [diff] [blame] | 739 | public void onExpansionStopped() { |
| 740 | mIsExpansionChanging = false; |
| 741 | mFirstChildWhileExpanding = null; |
| 742 | } |
| 743 | |
| 744 | public void setIsExpanded(boolean isExpanded) { |
| 745 | this.mIsExpanded = isExpanded; |
| 746 | } |
| 747 | |
| 748 | public void notifyChildrenChanged(ViewGroup hostView) { |
| 749 | if (mIsExpansionChanging) { |
| 750 | updateFirstChildHeightWhileExpanding(hostView); |
| 751 | } |
| 752 | } |
| 753 | |
Selim Cinek | 34c0a8d | 2014-05-12 00:01:43 +0200 | [diff] [blame] | 754 | public void setDimmed(boolean dimmed) { |
| 755 | updatePadding(dimmed); |
| 756 | } |
| 757 | |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 758 | class StackScrollAlgorithmState { |
| 759 | |
| 760 | /** |
| 761 | * The scroll position of the algorithm |
| 762 | */ |
| 763 | public int scrollY; |
| 764 | |
| 765 | /** |
| 766 | * The quantity of items which are in the top stack. |
| 767 | */ |
| 768 | public float itemsInTopStack; |
| 769 | |
| 770 | /** |
| 771 | * how far in is the element currently transitioning into the top stack |
| 772 | */ |
| 773 | public float partialInTop; |
| 774 | |
| 775 | /** |
Selim Cinek | 343e6e2 | 2014-04-11 21:23:30 +0200 | [diff] [blame] | 776 | * The number of pixels the last child in the top stack has scrolled in to the stack |
| 777 | */ |
| 778 | public float scrolledPixelsTop; |
| 779 | |
| 780 | /** |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 781 | * The last item index which is in the top stack. |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 782 | */ |
| 783 | public int lastTopStackIndex; |
| 784 | |
| 785 | /** |
| 786 | * The quantity of items which are in the bottom stack. |
| 787 | */ |
| 788 | public float itemsInBottomStack; |
| 789 | |
| 790 | /** |
| 791 | * how far in is the element currently transitioning into the bottom stack |
| 792 | */ |
| 793 | public float partialInBottom; |
Jorim Jaggi | d4a5744 | 2014-04-10 02:45:55 +0200 | [diff] [blame] | 794 | |
| 795 | /** |
| 796 | * The children from the host view which are not gone. |
| 797 | */ |
Jorim Jaggi | be565df | 2014-04-28 17:51:23 +0200 | [diff] [blame] | 798 | public final ArrayList<ExpandableView> visibleChildren = new ArrayList<ExpandableView>(); |
Selim Cinek | 67b2260 | 2014-03-10 15:40:16 +0100 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | } |