helencheuk
2691cdfa8b
Bug: 310953377 Test: Manual Flag: ACONFIG com.android.launcher3.enable_focus_outline Development Change-Id: If85c33ecea3241e69927917e910386d0346ef43b
75 lines
2.6 KiB
Java
75 lines
2.6 KiB
Java
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.keyboard;
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import android.graphics.Rect;
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import android.view.View;
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import android.view.View.OnFocusChangeListener;
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import com.android.launcher3.Flags;
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import com.android.launcher3.R;
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import com.android.launcher3.util.Themes;
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/**
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* A helper class to draw background of a focused view.
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*/
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public abstract class FocusIndicatorHelper extends ItemFocusIndicatorHelper<View>
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implements OnFocusChangeListener {
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public FocusIndicatorHelper(View container) {
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super(container, Flags.enableFocusOutline() ? Themes.getAttrColor(container.getContext(),
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R.attr.focusOutlineColor)
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: container.getResources().getColor(R.color.focused_background));
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}
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@Override
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public void onFocusChange(View v, boolean hasFocus) {
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changeFocus(v, hasFocus);
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}
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@Override
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protected boolean shouldDraw(View item) {
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return item.isAttachedToWindow();
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}
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/**
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* Simple subclass which assumes that the target view is a child of the container.
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*/
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public static class SimpleFocusIndicatorHelper extends FocusIndicatorHelper {
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public SimpleFocusIndicatorHelper(View container) {
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super(container);
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}
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@Override
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public void viewToRect(View v, Rect outRect) {
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if (Flags.enableFocusOutline()) {
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// Ensure the left and top would not be negative and drawn outside of canvas
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outRect.set(Math.max(0, v.getLeft()), Math.max(0, v.getTop()), v.getRight(),
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v.getBottom());
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// Stroke is drawn with half outside and half inside the view. Inset by half
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// stroke width to move the whole stroke inside the view and avoid other views
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// occluding it
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int halfStrokeWidth = (int) mPaint.getStrokeWidth() / 2;
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outRect.inset(halfStrokeWidth, halfStrokeWidth);
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} else {
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outRect.set(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
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}
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}
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}
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}
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