Generalizing the PredicitonScroll view so that in can be used in all-apps (9b458a00) · Commits · e / os / android_packages_apps_Trebuchet

res/layout/widgets_full_sheet_paged_view.xml

+5 −4

Original line number	Diff line number	Diff line
		@@ -41,7 +41,7 @@
		</com.android.launcher3.widget.picker.WidgetPagedView>

		<!-- SearchAndRecommendationsView contains the tab layout as well -->
		<com.android.launcher3.widget.picker.SearchAndRecommendationsView
		<com.android.launcher3.views.StickyHeaderLayout
		android:id="@+id/search_and_recommendations_container"
		android:layout_width="match_parent"
		android:layout_height="wrap_content"
		@@ -68,7 +68,7 @@
		android:background="?android:attr/colorBackground"
		android:paddingBottom="8dp"
		android:paddingHorizontal="@dimen/widget_list_horizontal_margin"
		android:clipToPadding="false">
		launcher:layout_sticky="true">
		<include layout="@layout/widgets_search_bar" />
		</FrameLayout>

		@@ -92,7 +92,8 @@
		android:paddingLeft="@dimen/widget_tabs_horizontal_padding"
		android:paddingRight="@dimen/widget_tabs_horizontal_padding"
		android:background="?android:attr/colorBackground"
		style="@style/TextHeadline">
		style="@style/TextHeadline"
		launcher:layout_sticky="true">

		<Button
		android:id="@+id/tab_personal"
		@@ -121,5 +122,5 @@
		style="?android:attr/borderlessButtonStyle" />
		</com.android.launcher3.workprofile.PersonalWorkSlidingTabStrip>

		</com.android.launcher3.widget.picker.SearchAndRecommendationsView>
		</com.android.launcher3.views.StickyHeaderLayout>
		</merge>
		No newline at end of file

res/layout/widgets_full_sheet_recyclerview.xml

+6 −4

Original line number	Diff line number	Diff line
		@@ -13,7 +13,8 @@
		See the License for the specific language governing permissions and
		limitations under the License.
		-->
		<merge xmlns:android="http://schemas.android.com/apk/res/android">
		<merge xmlns:android="http://schemas.android.com/apk/res/android"
		xmlns:launcher="http://schemas.android.com/apk/res-auto" >
		<com.android.launcher3.widget.picker.WidgetsRecyclerView
		android:id="@+id/primary_widgets_list_view"
		android:layout_below="@id/collapse_handle"
		@@ -23,7 +24,7 @@
		android:clipToPadding="false" />

		<!-- SearchAndRecommendationsView without the tab layout as well -->
		<com.android.launcher3.widget.picker.SearchAndRecommendationsView
		<com.android.launcher3.views.StickyHeaderLayout
		android:id="@+id/search_and_recommendations_container"
		android:layout_width="match_parent"
		android:layout_height="wrap_content"
		@@ -50,7 +51,8 @@
		android:background="?android:attr/colorBackground"
		android:paddingHorizontal="@dimen/widget_list_horizontal_margin"
		android:paddingBottom="8dp"
		android:clipToPadding="false">
		android:clipToPadding="false"
		launcher:layout_sticky="true" >
		<include layout="@layout/widgets_search_bar" />
		</FrameLayout>

		@@ -63,6 +65,6 @@
		android:paddingVertical="@dimen/recommended_widgets_table_vertical_padding"
		android:paddingHorizontal="@dimen/widget_list_horizontal_margin"
		android:visibility="gone" />
		</com.android.launcher3.widget.picker.SearchAndRecommendationsView>
		</com.android.launcher3.views.StickyHeaderLayout>

		</merge>
		No newline at end of file

res/values/attrs.xml

+4 −0

Original line number	Diff line number	Diff line
		@@ -136,6 +136,10 @@
		<attr name="layout_ignoreInsets" format="boolean" />
		</declare-styleable>

		<declare-styleable name="StickyScroller_Layout">
		<attr name="layout_sticky" format="boolean" />
		</declare-styleable>

		<declare-styleable name="GridDisplayOption">
		<attr name="name" format="string" />

src/com/android/launcher3/widget/picker/SearchAndRecommendationsScrollController.java→src/com/android/launcher3/views/StickyHeaderLayout.java

+327 −0

Original line number	Diff line number	Diff line
		@@ -13,58 +13,55 @@
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		package com.android.launcher3.widget.picker;
		package com.android.launcher3.views;

		import static android.view.View.MeasureSpec.EXACTLY;
		import static android.view.View.MeasureSpec.makeMeasureSpec;

		import static com.android.launcher3.anim.AnimatorListeners.forEndCallback;

		import android.animation.Animator;
		import android.animation.ObjectAnimator;
		import android.content.Context;
		import android.content.res.TypedArray;
		import android.util.AttributeSet;
		import android.util.FloatProperty;
		import android.view.MotionEvent;
		import android.view.View;
		import android.view.ViewGroup;
		import android.widget.TextView;
		import android.widget.LinearLayout;

		import androidx.annotation.NonNull;
		import androidx.annotation.Nullable;
		import androidx.recyclerview.widget.RecyclerView;

		import com.android.launcher3.R;
		import com.android.launcher3.widget.picker.WidgetsSpaceViewHolderBinder.EmptySpaceView;
		import com.android.launcher3.widget.picker.search.WidgetsSearchBar;

		/**
		* A controller which measures & updates {@link WidgetsFullSheet}'s views padding, margin and
		* vertical displacement upon scrolling.
		* A {@link LinearLayout} container which allows scrolling parts of its content based on the
		* scroll of a different view. Views which are marked as sticky are not scrolled, giving the
		* illusion of a sticky header.
		*/
		final class SearchAndRecommendationsScrollController implements
		public class StickyHeaderLayout extends LinearLayout implements
		RecyclerView.OnChildAttachStateChangeListener {

		private static final FloatProperty<SearchAndRecommendationsScrollController> SCROLL_OFFSET =
		new FloatProperty<SearchAndRecommendationsScrollController>("scrollAnimOffset") {
		private static final FloatProperty<StickyHeaderLayout> SCROLL_OFFSET =
		new FloatProperty<StickyHeaderLayout>("scrollAnimOffset") {
		@Override
		public void setValue(SearchAndRecommendationsScrollController controller, float offset) {
		controller.mScrollOffset = offset;
		controller.updateHeaderScroll();
		public void setValue(StickyHeaderLayout view, float offset) {
		view.mScrollOffset = offset;
		view.updateHeaderScroll();
		}

		@Override
		public Float get(SearchAndRecommendationsScrollController controller) {
		return controller.mScrollOffset;
		public Float get(StickyHeaderLayout view) {
		return view.mScrollOffset;
		}
		};

		private static final MotionEventProxyMethod INTERCEPT_PROXY = ViewGroup::onInterceptTouchEvent;
		private static final MotionEventProxyMethod TOUCH_PROXY = ViewGroup::onTouchEvent;

		final SearchAndRecommendationsView mContainer;
		final View mSearchBarContainer;
		final WidgetsSearchBar mSearchBar;
		final TextView mHeaderTitle;
		final WidgetsRecommendationTableLayout mRecommendedWidgetsTable;
		@Nullable final View mTabBar;

		private WidgetsRecyclerView mCurrentRecyclerView;
		private RecyclerView mCurrentRecyclerView;
		private EmptySpaceView mCurrentEmptySpaceView;

		private float mLastScroll = 0;
		@@ -72,22 +69,29 @@ final class SearchAndRecommendationsScrollController implements
		private Animator mOffsetAnimator;

		private boolean mShouldForwardToRecyclerView = false;

		private int mHeaderHeight;

		SearchAndRecommendationsScrollController(
		SearchAndRecommendationsView searchAndRecommendationContainer) {
		mContainer = searchAndRecommendationContainer;
		mSearchBarContainer = mContainer.findViewById(R.id.search_bar_container);
		mSearchBar = mContainer.findViewById(R.id.widgets_search_bar);
		mHeaderTitle = mContainer.findViewById(R.id.title);
		mRecommendedWidgetsTable = mContainer.findViewById(R.id.recommended_widget_table);
		mTabBar = mContainer.findViewById(R.id.tabs);
		public StickyHeaderLayout(Context context) {
		this(context, /* attrs= */ null);
		}

		public StickyHeaderLayout(Context context, AttributeSet attrs) {
		this(context, attrs, /* defStyleAttr= */ 0);
		}

		public StickyHeaderLayout(Context context, AttributeSet attrs, int defStyleAttr) {
		this(context, attrs, defStyleAttr, /* defStyleRes= */ 0);
		}

		mContainer.setSearchAndRecommendationScrollController(this);
		public StickyHeaderLayout(Context context, AttributeSet attrs, int defStyleAttr,
		int defStyleRes) {
		super(context, attrs, defStyleAttr, defStyleRes);
		}

		public void setCurrentRecyclerView(WidgetsRecyclerView currentRecyclerView) {
		/**
		* Sets the recycler view, this sticky header should track
		*/
		public void setCurrentRecyclerView(RecyclerView currentRecyclerView) {
		boolean animateReset = mCurrentRecyclerView != null;
		if (mCurrentRecyclerView != null) {
		mCurrentRecyclerView.removeOnChildAttachStateChangeListener(this);
		@@ -104,16 +108,11 @@ final class SearchAndRecommendationsScrollController implements

		private void updateHeaderScroll() {
		mLastScroll = getCurrentScroll();
		mHeaderTitle.setTranslationY(mLastScroll);
		mRecommendedWidgetsTable.setTranslationY(mLastScroll);

		float searchYDisplacement = Math.max(mLastScroll, -mSearchBarContainer.getTop());
		mSearchBarContainer.setTranslationY(searchYDisplacement);

		if (mTabBar != null) {
		float tabsDisplacement = Math.max(mLastScroll, -mTabBar.getTop()
		+ mSearchBarContainer.getHeight());
		mTabBar.setTranslationY(tabsDisplacement);
		int count = getChildCount();
		for (int i = 0; i < count; i++) {
		View child = getChildAt(i);
		MyLayoutParams lp = (MyLayoutParams) child.getLayoutParams();
		child.setTranslationY(Math.max(mLastScroll, lp.scrollLimit));
		}
		}

		@@ -121,25 +120,14 @@ final class SearchAndRecommendationsScrollController implements
		return mScrollOffset + (mCurrentEmptySpaceView == null ? 0 : mCurrentEmptySpaceView.getY());
		}

		/**
		* Updates the scrollable header height
		*
		* @return {@code true} if the header height or dependent property changed.
		*/
		public boolean updateHeaderHeight() {
		boolean hasSizeUpdated = false;

		int headerHeight = mContainer.getMeasuredHeight();
		if (headerHeight != mHeaderHeight) {
		mHeaderHeight = headerHeight;
		hasSizeUpdated = true;
		}
		@Override
		protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		super.onMeasure(widthMeasureSpec, heightMeasureSpec);

		if (mCurrentEmptySpaceView != null
		&& mCurrentEmptySpaceView.setFixedHeight(mHeaderHeight)) {
		hasSizeUpdated = true;
		mHeaderHeight = getMeasuredHeight();
		if (mCurrentEmptySpaceView != null) {
		mCurrentEmptySpaceView.setFixedHeight(mHeaderHeight);
		}
		return hasSizeUpdated;
		}

		/** Resets any previous view translation. */
		@@ -160,23 +148,21 @@ final class SearchAndRecommendationsScrollController implements
		}
		}

		/**
		* Returns {@code true} if a touch event should be intercepted by this controller.
		*/
		@Override
		public boolean onInterceptTouchEvent(MotionEvent event) {
		return (mShouldForwardToRecyclerView = proxyMotionEvent(event, INTERCEPT_PROXY));
		return (mShouldForwardToRecyclerView = proxyMotionEvent(event, INTERCEPT_PROXY))
		\|\| super.onInterceptTouchEvent(event);
		}

		/**
		* Returns {@code true} if this controller has intercepted and consumed a touch event.
		*/
		@Override
		public boolean onTouchEvent(MotionEvent event) {
		return mShouldForwardToRecyclerView && proxyMotionEvent(event, TOUCH_PROXY);
		return mShouldForwardToRecyclerView && proxyMotionEvent(event, TOUCH_PROXY)
		\|\| super.onTouchEvent(event);
		}

		private boolean proxyMotionEvent(MotionEvent event, MotionEventProxyMethod method) {
		float dx = mCurrentRecyclerView.getLeft() - mContainer.getLeft();
		float dy = mCurrentRecyclerView.getTop() - mContainer.getTop();
		float dx = mCurrentRecyclerView.getLeft() - getLeft();
		float dy = mCurrentRecyclerView.getTop() - getTop();
		event.offsetLocation(dx, dy);
		try {
		return method.proxyEvent(mCurrentRecyclerView, event);
		@@ -216,8 +202,126 @@ final class SearchAndRecommendationsScrollController implements
		}
		}

		@Override
		protected void onLayout(boolean changed, int l, int t, int r, int b) {
		super.onLayout(changed, l, t, r, b);

		// Update various stick parameters
		int count = getChildCount();
		int stickyHeaderHeight = 0;
		for (int i = 0; i < count; i++) {
		View v = getChildAt(i);
		MyLayoutParams lp = (MyLayoutParams) v.getLayoutParams();
		if (lp.sticky) {
		lp.scrollLimit = -v.getTop() + stickyHeaderHeight;
		stickyHeaderHeight += v.getHeight();
		} else {
		lp.scrollLimit = Integer.MIN_VALUE;
		}
		}
		updateHeaderScroll();
		}

		@Override
		protected LayoutParams generateDefaultLayoutParams() {
		return new MyLayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
		}

		@Override
		protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams lp) {
		return new MyLayoutParams(lp.width, lp.height);
		}

		@Override
		public LayoutParams generateLayoutParams(AttributeSet attrs) {
		return new MyLayoutParams(getContext(), attrs);
		}

		@Override
		protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
		return p instanceof MyLayoutParams;
		}

		private static class MyLayoutParams extends LayoutParams {

		public final boolean sticky;
		public int scrollLimit;

		MyLayoutParams(int width, int height) {
		super(width, height);
		sticky = false;
		}

		MyLayoutParams(Context c, AttributeSet attrs) {
		super(c, attrs);
		TypedArray a = c.obtainStyledAttributes(attrs, R.styleable.StickyScroller_Layout);
		sticky = a.getBoolean(R.styleable.StickyScroller_Layout_layout_sticky, false);
		a.recycle();
		}
		}

		private interface MotionEventProxyMethod {

		boolean proxyEvent(ViewGroup view, MotionEvent event);
		}

		/**
		* Empty view which allows listening for 'Y' changes
		*/
		public static class EmptySpaceView extends View {

		private Runnable mOnYChangeCallback;
		private int mHeight = 0;

		public EmptySpaceView(Context context) {
		super(context);
		animate().setUpdateListener(v -> notifyYChanged());
		}

		/**
		* Sets the height for the empty view
		* @return true if the height changed, false otherwise
		*/
		public boolean setFixedHeight(int height) {
		if (mHeight != height) {
		mHeight = height;
		requestLayout();
		return true;
		}
		return false;
		}

		@Override
		protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		super.onMeasure(widthMeasureSpec, makeMeasureSpec(mHeight, EXACTLY));
		}

		public void setOnYChangeCallback(Runnable callback) {
		mOnYChangeCallback = callback;
		}

		@Override
		protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
		super.onLayout(changed, left, top, right, bottom);
		notifyYChanged();
		}

		@Override
		public void offsetTopAndBottom(int offset) {
		super.offsetTopAndBottom(offset);
		notifyYChanged();
		}

		@Override
		public void setTranslationY(float translationY) {
		super.setTranslationY(translationY);
		notifyYChanged();
		}

		private void notifyYChanged() {
		if (mOnYChangeCallback != null) {
		mOnYChangeCallback.run();
		}
		}
		}
		}

src/com/android/launcher3/widget/picker/SearchAndRecommendationsView.java

deleted100644 → 0

+0 −62

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2021 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		package com.android.launcher3.widget.picker;

		import android.content.Context;
		import android.util.AttributeSet;
		import android.view.MotionEvent;
		import android.widget.LinearLayout;

		/**
		* A {@link LinearLayout} container for holding search and widgets recommendation.
		*
		* <p>This class intercepts touch events and dispatch them to the right view.
		*/
		public class SearchAndRecommendationsView extends LinearLayout {
		private SearchAndRecommendationsScrollController mController;

		public SearchAndRecommendationsView(Context context) {
		this(context, /* attrs= */ null);
		}

		public SearchAndRecommendationsView(Context context, AttributeSet attrs) {
		this(context, attrs, /* defStyleAttr= */ 0);
		}

		public SearchAndRecommendationsView(Context context, AttributeSet attrs, int defStyleAttr) {
		this(context, attrs, defStyleAttr, /* defStyleRes= */ 0);
		}

		public SearchAndRecommendationsView(Context context, AttributeSet attrs, int defStyleAttr,
		int defStyleRes) {
		super(context, attrs, defStyleAttr, defStyleRes);
		}

		public void setSearchAndRecommendationScrollController(
		SearchAndRecommendationsScrollController controller) {
		mController = controller;
		}

		@Override
		public boolean onInterceptTouchEvent(MotionEvent event) {
		return mController.onInterceptTouchEvent(event) \|\| super.onInterceptTouchEvent(event);
		}

		@Override
		public boolean onTouchEvent(MotionEvent event) {
		return mController.onTouchEvent(event) \|\| super.onTouchEvent(event);
		}
		}