| /* |
| * Copyright (C) 2018 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.qs; |
| |
| import android.content.Context; |
| import android.support.v4.widget.NestedScrollView; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.ViewConfiguration; |
| import android.view.ViewParent; |
| import android.widget.LinearLayout; |
| |
| import com.android.systemui.R; |
| |
| /** |
| * Quick setting scroll view containing the brightness slider and the QS tiles. |
| * |
| * <p>Call {@link #shouldIntercept(MotionEvent)} from parent views' |
| * {@link #onInterceptTouchEvent(MotionEvent)} method to determine whether this view should |
| * consume the touch event. |
| */ |
| public class QSScrollLayout extends NestedScrollView { |
| private final int mTouchSlop; |
| private final int mFooterHeight; |
| private int mLastMotionY; |
| |
| public QSScrollLayout(Context context, View... children) { |
| super(context); |
| mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop(); |
| mFooterHeight = getResources().getDimensionPixelSize(R.dimen.qs_footer_height); |
| LinearLayout linearLayout = new LinearLayout(mContext); |
| linearLayout.setLayoutParams(new LinearLayout.LayoutParams( |
| LinearLayout.LayoutParams.MATCH_PARENT, |
| LinearLayout.LayoutParams.WRAP_CONTENT)); |
| linearLayout.setOrientation(LinearLayout.VERTICAL); |
| for (View view : children) { |
| linearLayout.addView(view); |
| } |
| addView(linearLayout); |
| } |
| |
| |
| @Override |
| public boolean onInterceptTouchEvent(MotionEvent ev) { |
| if (canScrollVertically(1) || canScrollVertically(-1)) { |
| return super.onInterceptTouchEvent(ev); |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean onTouchEvent(MotionEvent ev) { |
| if (canScrollVertically(1) || canScrollVertically(-1)) { |
| return super.onTouchEvent(ev); |
| } |
| return false; |
| } |
| |
| public boolean shouldIntercept(MotionEvent ev) { |
| if (ev.getY() > (getBottom() - mFooterHeight)) { |
| // Do not intercept touches that are below the divider between QS and the footer. |
| return false; |
| } |
| if (ev.getActionMasked() == MotionEvent.ACTION_DOWN) { |
| mLastMotionY = (int) ev.getY(); |
| } else if (ev.getActionMasked() == MotionEvent.ACTION_MOVE) { |
| // Do not allow NotificationPanelView to intercept touch events when this |
| // view can be scrolled down. |
| if (mLastMotionY >= 0 && Math.abs(ev.getY() - mLastMotionY) > mTouchSlop |
| && canScrollVertically(1)) { |
| requestParentDisallowInterceptTouchEvent(true); |
| mLastMotionY = (int) ev.getY(); |
| return true; |
| } |
| } else if (ev.getActionMasked() == MotionEvent.ACTION_CANCEL |
| || ev.getActionMasked() == MotionEvent.ACTION_UP) { |
| mLastMotionY = -1; |
| requestParentDisallowInterceptTouchEvent(false); |
| } |
| return false; |
| } |
| |
| private void requestParentDisallowInterceptTouchEvent(boolean disallowIntercept) { |
| final ViewParent parent = getParent(); |
| if (parent != null) { |
| parent.requestDisallowInterceptTouchEvent(disallowIntercept); |
| } |
| } |
| } |