| /* |
| * Copyright (C) 2017 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.systemui.statusbar.phone; |
| |
| import android.content.Context; |
| import android.content.res.Configuration; |
| import android.graphics.Rect; |
| import android.support.annotation.VisibleForTesting; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.util.Pair; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.FrameLayout; |
| |
| import com.android.systemui.R; |
| |
| import java.util.ArrayList; |
| import java.util.Comparator; |
| |
| /** |
| * Redirects touches that aren't handled by any child view to the nearest |
| * clickable child. Only takes effect on <sw600dp. |
| */ |
| public class NearestTouchFrame extends FrameLayout { |
| |
| private final ArrayList<View> mClickableChildren = new ArrayList<>(); |
| private final boolean mIsActive; |
| private final int[] mTmpInt = new int[2]; |
| private final int[] mOffset = new int[2]; |
| private View mTouchingChild; |
| |
| public NearestTouchFrame(Context context, AttributeSet attrs) { |
| this(context, attrs, context.getResources().getConfiguration()); |
| } |
| |
| @VisibleForTesting |
| NearestTouchFrame(Context context, AttributeSet attrs, Configuration c) { |
| super(context, attrs); |
| mIsActive = c.smallestScreenWidthDp < 600; |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| mClickableChildren.clear(); |
| addClickableChildren(this); |
| } |
| |
| @Override |
| protected void onLayout(boolean changed, int left, int top, int right, int bottom) { |
| super.onLayout(changed, left, top, right, bottom); |
| getLocationInWindow(mOffset); |
| } |
| |
| private void addClickableChildren(ViewGroup group) { |
| final int N = group.getChildCount(); |
| for (int i = 0; i < N; i++) { |
| View child = group.getChildAt(i); |
| if (child.isClickable()) { |
| mClickableChildren.add(child); |
| } else if (child instanceof ViewGroup) { |
| addClickableChildren((ViewGroup) child); |
| } |
| } |
| } |
| |
| @Override |
| public boolean onTouchEvent(MotionEvent event) { |
| if (mIsActive) { |
| if (event.getAction() == MotionEvent.ACTION_DOWN) { |
| mTouchingChild = findNearestChild(event); |
| } |
| if (mTouchingChild != null) { |
| event.offsetLocation(mTouchingChild.getWidth() / 2 - event.getX(), |
| mTouchingChild.getHeight() / 2 - event.getY()); |
| return mTouchingChild.getVisibility() == VISIBLE |
| && mTouchingChild.dispatchTouchEvent(event); |
| } |
| } |
| return super.onTouchEvent(event); |
| } |
| |
| private View findNearestChild(MotionEvent event) { |
| return mClickableChildren.stream().map(v -> new Pair<>(distance(v, event), v)) |
| .min(Comparator.comparingInt(f -> f.first)).get().second; |
| } |
| |
| private int distance(View v, MotionEvent event) { |
| v.getLocationInWindow(mTmpInt); |
| int left = mTmpInt[0] - mOffset[0]; |
| int top = mTmpInt[1] - mOffset[1]; |
| int right = left + v.getWidth(); |
| int bottom = top + v.getHeight(); |
| |
| int x = Math.min(Math.abs(left - (int) event.getX()), |
| Math.abs((int) event.getX() - right)); |
| int y = Math.min(Math.abs(top - (int) event.getY()), |
| Math.abs((int) event.getY() - bottom)); |
| |
| return Math.max(x, y); |
| } |
| } |