Implement drag to open overflow menu, lift to select (80e72700) · Commits · e / os / android_frameworks_base

core/java/com/android/internal/view/menu/ActionMenuPresenter.java

+51 −3

Original line number	Diff line number	Diff line
		@@ -16,9 +16,6 @@

		package com.android.internal.view.menu;

		import com.android.internal.view.ActionBarPolicy;
		import com.android.internal.view.menu.ActionMenuView.ActionMenuChildView;

		import android.content.Context;
		import android.content.res.Configuration;
		import android.content.res.Resources;
		@@ -27,11 +24,18 @@ import android.os.Parcelable;
		import android.util.SparseBooleanArray;
		import android.view.ActionProvider;
		import android.view.MenuItem;
		import android.view.MotionEvent;
		import android.view.SoundEffectConstants;
		import android.view.View;
		import android.view.ViewConfiguration;
		import android.view.View.MeasureSpec;
		import android.view.ViewGroup;
		import android.widget.AbsListView;
		import android.widget.ImageButton;
		import android.widget.ListPopupWindow;

		import com.android.internal.view.ActionBarPolicy;
		import com.android.internal.view.menu.ActionMenuView.ActionMenuChildView;

		import java.util.ArrayList;

		@@ -559,6 +563,7 @@ public class ActionMenuPresenter extends BaseMenuPresenter
		setFocusable(true);
		setVisibility(VISIBLE);
		setEnabled(true);
		setOnTouchListener(new OverflowForwardListener(context));
		}

		@Override
		@@ -572,10 +577,12 @@ public class ActionMenuPresenter extends BaseMenuPresenter
		return true;
		}

		@Override
		public boolean needsDividerBefore() {
		return false;
		}

		@Override
		public boolean needsDividerAfter() {
		return false;
		}
		@@ -675,4 +682,45 @@ public class ActionMenuPresenter extends BaseMenuPresenter
		mPostedOpenRunnable = null;
		}
		}

		private class OverflowForwardListener extends TouchForwardingListener {
		/** Scaled touch slop, used for detecting movement outside bounds. */
		private final float mScaledTouchSlop;

		private int mActivePointerId = MotionEvent.INVALID_POINTER_ID;

		public OverflowForwardListener(Context context) {
		mScaledTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
		}

		@Override
		public boolean onTouchObserved(View v, MotionEvent ev) {
		if (ev.getActionMasked() == MotionEvent.ACTION_MOVE && v.isEnabled()
		&& !v.pointInView(ev.getX(), ev.getY(), mScaledTouchSlop)) {
		mActivePointerId = ev.getPointerId(0);
		v.performClick();
		return true;
		}

		return false;
		}

		@Override
		public boolean onTouchForwarded(View v, MotionEvent ev) {
		if (!v.isEnabled() \|\| mOverflowPopup == null \|\| !mOverflowPopup.isShowing()) {
		return false;
		}

		if (mActivePointerId != MotionEvent.INVALID_POINTER_ID) {
		if (mOverflowPopup.forwardMotionEvent(v, ev, mActivePointerId)) {
		return true;
		}

		mActivePointerId = MotionEvent.INVALID_POINTER_ID;
		}

		mOverflowPopup.dismiss();
		return false;
		}
		}
		}

core/java/com/android/internal/view/menu/MenuPopupHelper.java

+67 −0

Original line number	Diff line number	Diff line
		@@ -22,10 +22,12 @@ import android.os.Parcelable;
		import android.view.KeyEvent;
		import android.view.LayoutInflater;
		import android.view.MenuItem;
		import android.view.MotionEvent;
		import android.view.View;
		import android.view.View.MeasureSpec;
		import android.view.ViewGroup;
		import android.view.ViewTreeObserver;
		import android.widget.AbsListView;
		import android.widget.AdapterView;
		import android.widget.BaseAdapter;
		import android.widget.FrameLayout;
		@@ -46,6 +48,8 @@ public class MenuPopupHelper implements AdapterView.OnItemClickListener, View.On

		static final int ITEM_LAYOUT = com.android.internal.R.layout.popup_menu_item_layout;

		private final int[] mTempLocation = new int[2];

		private final Context mContext;
		private final LayoutInflater mInflater;
		private final MenuBuilder mMenu;
		@@ -158,6 +162,69 @@ public class MenuPopupHelper implements AdapterView.OnItemClickListener, View.On
		return mPopup != null && mPopup.isShowing();
		}

		public boolean forwardMotionEvent(View v, MotionEvent ev, int activePointerId) {
		if (mPopup == null \|\| !mPopup.isShowing()) {
		return false;
		}

		final AbsListView dstView = mPopup.getListView();
		if (dstView == null \|\| !dstView.isShown()) {
		return false;
		}

		boolean cancelForwarding = false;
		final int actionMasked = ev.getActionMasked();
		switch (actionMasked) {
		case MotionEvent.ACTION_CANCEL:
		cancelForwarding = true;
		break;
		case MotionEvent.ACTION_UP:
		cancelForwarding = true;
		// $FALL-THROUGH$
		case MotionEvent.ACTION_MOVE:
		final int activeIndex = ev.findPointerIndex(activePointerId);
		if (activeIndex < 0) {
		return false;
		}

		final int[] location = mTempLocation;
		int x = (int) ev.getX(activeIndex);
		int y = (int) ev.getY(activeIndex);

		// Convert to global coordinates.
		v.getLocationOnScreen(location);
		x += location[0];
		y += location[1];

		// Convert to local coordinates.
		dstView.getLocationOnScreen(location);
		x -= location[0];
		y -= location[1];

		final int position = dstView.pointToPosition(x, y);
		if (position >= 0) {
		final int childCount = dstView.getChildCount();
		final int firstVisiblePosition = dstView.getFirstVisiblePosition();
		final int index = position - firstVisiblePosition;
		if (index < childCount) {
		final View child = dstView.getChildAt(index);
		if (actionMasked == MotionEvent.ACTION_UP) {
		// Touch ended, click highlighted item.
		final long id = dstView.getItemIdAtPosition(position);
		dstView.performItemClick(child, position, id);
		} else if (actionMasked == MotionEvent.ACTION_MOVE) {
		// TODO: Highlight touched item, activate after
		// long-hover. Consider forwarding events as HOVER and
		// letting ListView handle this.
		}
		}
		}
		break;
		}

		return true;
		}

		@Override
		public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
		MenuAdapter adapter = mAdapter;

core/java/com/android/internal/view/menu/TouchForwardingListener.java

0 → 100644

+72 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2013 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.internal.view.menu;

		import android.view.MotionEvent;
		import android.view.View;

		/**
		* Touch listener used to intercept touches and forward them out of a view.
		*/
		abstract class TouchForwardingListener implements View.OnTouchListener {
		/** Whether this listener is currently forwarding touch events. */
		private boolean mForwarding;

		@Override
		public boolean onTouch(View v, MotionEvent ev) {
		final int actionMasked = ev.getActionMasked();

		if (mForwarding) {
		// Rejecting the event or ending the stream stops forwarding.
		if (!onTouchForwarded(v, ev) \|\| actionMasked == MotionEvent.ACTION_UP
		\|\| actionMasked == MotionEvent.ACTION_CANCEL) {
		stopForwarding();
		}
		} else {
		if (onTouchObserved(v, ev)) {
		startForwarding();
		}
		}

		return mForwarding;
		}

		public void startForwarding() {
		mForwarding = true;
		}

		public void stopForwarding() {
		mForwarding = false;
		}

		/**
		* Attempts to start forwarding motion events.
		*
		* @param v The view that triggered forwarding.
		* @return True to start forwarding motion events, or false to cancel.
		*/
		public abstract boolean onTouchObserved(View v, MotionEvent ev);

		/**
		* Handles forwarded motion events.
		*
		* @param v The view from which the event was forwarded.
		* @param ev The forwarded motion event.
		* @return True to continue forwarding motion events, or false to cancel.
		*/
		public abstract boolean onTouchForwarded(View v, MotionEvent ev);
		}