Make drag and drop also work when the widget tray is still in scroll mode. (ebe1734a) · Commits · e / os / BlissLauncher3

res/layout/widgets_view.xml

+1 −1

Original line number	Diff line number	Diff line
		@@ -40,7 +40,7 @@
		android:clipChildren="false"
		android:orientation="vertical">

		<android.support.v7.widget.RecyclerView
		<com.android.launcher3.widget.WidgetsContainerRecyclerView
		android:id="@+id/widgets_list_view"
		android:layout_width="match_parent"
		android:layout_height="match_parent"

src/com/android/launcher3/AppsContainerRecyclerView.java

+16 −1

Original line number	Diff line number	Diff line
		@@ -40,6 +40,11 @@ public class AppsContainerRecyclerView extends RecyclerView
		implements RecyclerView.OnItemTouchListener {

		private static final float FAST_SCROLL_OVERLAY_Y_OFFSET_FACTOR = 1.5f;
		private static final int SCROLL_DELTA_THRESHOLD = 6;

		/** Keeps the last known scrolling delta/velocity along y-axis. */
		private int mDy = 0;
		private float mDeltaThreshold;

		private AlphabeticalAppsList mApps;
		private int mNumAppsPerRow;
		@@ -92,6 +97,7 @@ public class AppsContainerRecyclerView extends RecyclerView
		mScrollbarInset =
		res.getDimensionPixelSize(R.dimen.apps_view_fast_scroll_scrubber_touch_inset);
		setFastScrollerAlpha(getFastScrollerAlpha());
		mDeltaThreshold = getResources().getDisplayMetrics().density * SCROLL_DELTA_THRESHOLD;
		}

		/**
		@@ -132,6 +138,7 @@ public class AppsContainerRecyclerView extends RecyclerView

		@Override
		protected void onFinishInflate() {
		super.onFinishInflate();
		addOnItemTouchListener(this);
		}

		@@ -142,6 +149,11 @@ public class AppsContainerRecyclerView extends RecyclerView
		drawFastScrollerPopup(canvas);
		}

		@Override
		public void onScrolled(int dx, int dy) {
		mDy = dy;
		}

		/**
		* We intercept the touch handling only to support fast scrolling when initiated from the
		* scroll bar. Otherwise, we fall back to the default RecyclerView touch handling.
		@@ -175,7 +187,10 @@ public class AppsContainerRecyclerView extends RecyclerView
		// Keep track of the down positions
		mDownX = mLastX = x;
		mDownY = mLastY = y;
		if ((Math.abs(mDy) < mDeltaThreshold &&
		getScrollState() != RecyclerView.SCROLL_STATE_IDLE)) {
		stopScroll();
		}
		break;
		case MotionEvent.ACTION_MOVE:
		// Check if we are scrolling

src/com/android/launcher3/widget/WidgetsRowView.java→src/com/android/launcher3/widget/WidgetsContainerRecyclerView.java

+80 −0

Original line number	Diff line number	Diff line
		@@ -17,74 +17,64 @@
		package com.android.launcher3.widget;

		import android.content.Context;
		import android.support.v7.widget.RecyclerView;
		import android.util.AttributeSet;
		import android.view.MotionEvent;
		import android.widget.FrameLayout;
		import android.widget.HorizontalScrollView;
		import android.widget.TextView;

		import com.android.launcher3.R;

		/**
		* Layout used for widget tray rows for each app. For performance, this view can be replaced with
		* a {@link RecyclerView} in the future if we settle on scrollable single row for the widgets.
		* If we decide on collapsable grid, then HorizontalScrollView can be replaced with a
		* {@link GridLayout}.
		* The widgets recycler view container.
		* <p>
		* Overwritten to NOT intercept a touch sequence that started when the {@link RecycleView}
		* scrolling slowing down below the internally defined threshold.
		*/
		public class WidgetsRowView extends HorizontalScrollView {
		static final String TAG = "WidgetsRow";
		public class WidgetsContainerRecyclerView extends RecyclerView
		implements RecyclerView.OnItemTouchListener {

		private Runnable mOnLayoutListener;
		private String mAppName;
		private static final int SCROLL_DELTA_THRESHOLD = 6;

		public WidgetsRowView(Context context, String appName) {
		super(context, null, 0);
		mAppName = appName;
		}
		/** Keeps the last known scrolling delta/velocity along y-axis. */
		private int mDy = 0;
		private float mDeltaThreshold;

		/**
		* Clears all the key listeners for the individual widgets.
		*/
		public void resetChildrenOnKeyListeners() {
		int childCount = getChildCount();
		for (int j = 0; j < childCount; ++j) {
		getChildAt(j).setOnKeyListener(null);
		public WidgetsContainerRecyclerView(Context context) {
		this(context, null);
		}

		public WidgetsContainerRecyclerView(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
		}

		@Override
		protected void onAttachedToWindow() {
		super.onAttachedToWindow();
		TextView tv = (TextView) findViewById(R.id.widget_name);
		tv.setText(mAppName);
		public WidgetsContainerRecyclerView(Context context, AttributeSet attrs, int defStyleAttr) {
		super(context, attrs, defStyleAttr);
		mDeltaThreshold = getResources().getDisplayMetrics().density * SCROLL_DELTA_THRESHOLD;
		}

		@Override
		protected void onDetachedFromWindow() {
		super.onDetachedFromWindow();
		mOnLayoutListener = null;
		protected void onFinishInflate() {
		super.onFinishInflate();
		addOnItemTouchListener(this);
		}

		public void setOnLayoutListener(Runnable r) {
		mOnLayoutListener = r;
		@Override
		public void onScrolled(int dx, int dy) {
		mDy = dy;
		}

		@Override
		protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
		super.onLayout(changed, left, top, right, bottom);
		if (mOnLayoutListener != null) {
		mOnLayoutListener.run();
		public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent ev) {
		if (ev.getAction() == MotionEvent.ACTION_DOWN) {
		if ((Math.abs(mDy) < mDeltaThreshold &&
		getScrollState() != RecyclerView.SCROLL_STATE_IDLE)) {
		// now the touch events are being passed to the {@link WidgetCell} until the
		// touch sequence goes over the touch slop.
		stopScroll();
		}
		}

		@Override
		public boolean onTouchEvent(MotionEvent event) {
		boolean result = super.onTouchEvent(event);
		return result;
		return false;
		}

		public static class LayoutParams extends FrameLayout.LayoutParams {
		public LayoutParams(int width, int height) {
		super(width, height);
		}
		@Override
		public void onTouchEvent(RecyclerView rv, MotionEvent ev) {
		// Do nothing.
		}
		}
		No newline at end of file