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/*
* Copyright (C) 2019 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.window;
import static android.view.MotionEvent.ACTION_DOWN;
import static android.view.MotionEvent.ACTION_MOVE;
import static android.view.MotionEvent.ACTION_UP;
import static android.view.WindowInsets.Type.systemBars;
import android.content.Context;
import android.graphics.Insets;
import android.util.AttributeSet;
import android.view.DisplayCutout;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowInsets;
import android.widget.FrameLayout;
/**
* Status bar view.
*/
public class StatusBarWindowView extends FrameLayout {
public static final String TAG = "PhoneStatusBarWindowView";
public static final boolean DEBUG = false;
private int mLeftInset = 0;
private int mRightInset = 0;
private int mTopInset = 0;
private float mTouchDownY = 0;
public StatusBarWindowView(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public WindowInsets onApplyWindowInsets(WindowInsets windowInsets) {
final Insets insets = windowInsets.getInsetsIgnoringVisibility(systemBars());
mLeftInset = insets.left;
mRightInset = insets.right;
mTopInset = 0;
DisplayCutout displayCutout = getRootWindowInsets().getDisplayCutout();
if (displayCutout != null) {
mTopInset = displayCutout.getWaterfallInsets().top;
}
applyMargins();
return windowInsets;
}
/**
* This is specifically for pulling down the status bar as a consistent motion in the visual
* immersive mode. In the visual immersive mode, after the system detects a system gesture
* motion from the top, we show permanent bars, and then forward the touch events from the
* focused window to the status bar window. However, since the first relayed event is out of
* bound of the status bar view, in order for the touch event to be correctly dispatched down,
* we jot down the position Y of the initial touch down event, offset it to 0 in the y-axis,
* and calculate the movement based on first touch down position.
*/
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
if (ev.getAction() == ACTION_DOWN && ev.getRawY() > getHeight()) {
mTouchDownY = ev.getRawY();
ev.setLocation(ev.getRawX(), mTopInset);
} else if (ev.getAction() == ACTION_MOVE && mTouchDownY != 0) {
ev.setLocation(ev.getRawX(), mTopInset + ev.getRawY() - mTouchDownY);
} else if (ev.getAction() == ACTION_UP) {
mTouchDownY = 0;
}
return super.dispatchTouchEvent(ev);
}
private void applyMargins() {
final int count = getChildCount();
for (int i = 0; i < count; i++) {
View child = getChildAt(i);
if (child.getLayoutParams() instanceof LayoutParams) {
LayoutParams lp = (LayoutParams) child.getLayoutParams();
if (lp.rightMargin != mRightInset || lp.leftMargin != mLeftInset
|| lp.topMargin != mTopInset) {
lp.rightMargin = mRightInset;
lp.leftMargin = mLeftInset;
lp.topMargin = mTopInset;
child.requestLayout();
}
}
}
}
}
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