953b7e3bf5
Bug: 184807417 Test: make SettingsRoboTests Change-Id: I11156c85b6b955dd505b41a9a41be0756638f1dd
422 lines
17 KiB
Java
422 lines
17 KiB
Java
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. 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 distributed under the
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* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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package com.android.settings.fuelgauge;
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import static java.lang.Math.round;
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import android.content.Context;
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import android.content.res.Resources;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.CornerPathEffect;
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import android.graphics.Paint;
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import android.graphics.Path;
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import android.graphics.Rect;
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import android.util.AttributeSet;
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import android.util.Log;
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import android.view.HapticFeedbackConstants;
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import android.view.MotionEvent;
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import android.view.View;
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import android.widget.TextView;
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import androidx.appcompat.widget.AppCompatImageView;
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import com.android.settings.R;
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import com.android.settingslib.Utils;
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import java.util.Locale;
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/** A widget component to draw chart graph. */
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public class BatteryChartView extends AppCompatImageView implements View.OnClickListener {
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private static final String TAG = "BatteryChartView";
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// For drawing the percentage information.
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private static final String[] PERCENTAGES = new String[] {"100%", "50%", "0%"};
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private static final int DEFAULT_TRAPEZOID_COUNT = 12;
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private static final int DEFAULT_TIMESTAMP_COUNT = 4;
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/** Selects all trapezoid shapes. */
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public static final int SELECTED_INDEX_ALL = -1;
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public static final int SELECTED_INDEX_INVALID = -2;
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/** A callback listener for selected group index is updated. */
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public interface OnSelectListener {
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void onSelect(int trapezoidIndex);
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}
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private int mDividerWidth;
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private int mDividerHeight;
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private int mTrapezoidCount;
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private int mSelectedIndex;
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private float mTrapezoidVOffset;
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private float mTrapezoidHOffset;
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// Colors for drawing the trapezoid shape and dividers.
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private int mTrapezoidColor;
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private int mTrapezoidSolidColor;
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private final int mDividerColor = Color.parseColor("#CDCCC5");
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// For drawing the percentage information.
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private int mTextPadding;
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private final Rect mIndent = new Rect();
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private final Rect[] mPercentageBounds =
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new Rect[] {new Rect(), new Rect(), new Rect()};
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// For drawing the timestamp information.
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private String[] mTimestamps;
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private final Rect[] mTimestampsBounds =
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new Rect[] {new Rect(), new Rect(), new Rect(), new Rect()};
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private int[] mLevels;
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private Paint mTextPaint;
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private Paint mDividerPaint;
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private Paint mTrapezoidPaint;
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private TrapezoidSlot[] mTrapezoidSlots;
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// Records the location to calculate selected index.
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private MotionEvent mTouchUpEvent;
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private BatteryChartView.OnSelectListener mOnSelectListener;
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public BatteryChartView(Context context) {
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super(context, null);
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}
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public BatteryChartView(Context context, AttributeSet attrs) {
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super(context, attrs);
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initializeColors(context);
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// Registers the click event listener.
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setOnClickListener(this);
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setClickable(false);
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setSelectedIndex(SELECTED_INDEX_ALL);
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setTrapezoidCount(DEFAULT_TRAPEZOID_COUNT);
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}
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/** Sets the total trapezoid count for drawing. */
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public void setTrapezoidCount(int trapezoidCount) {
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Log.i(TAG, "trapezoidCount:" + trapezoidCount);
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mTrapezoidCount = trapezoidCount;
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mTrapezoidSlots = new TrapezoidSlot[trapezoidCount];
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// Allocates the trapezoid slot array.
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for (int index = 0; index < trapezoidCount; index++) {
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mTrapezoidSlots[index] = new TrapezoidSlot();
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}
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invalidate();
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}
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/** Sets all levels value to draw the trapezoid shape */
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public void setLevels(int[] levels) {
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if (levels == null) {
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mLevels = null;
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return;
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}
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// We should provide trapezoid count + 1 data to draw all trapezoids.
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mLevels = levels.length == mTrapezoidCount + 1 ? levels : null;
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setClickable(false);
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invalidate();
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if (mLevels == null) {
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return;
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}
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// Sets the chart is clickable if there is at least one valid item in it.
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for (int index = 0; index < mLevels.length - 1; index++) {
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if (mLevels[index] != 0 && mLevels[index + 1] != 0) {
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setClickable(true);
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break;
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}
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}
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}
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/** Sets the selected group index to draw highlight effect. */
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public void setSelectedIndex(int index) {
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if (mSelectedIndex != index) {
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mSelectedIndex = index;
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invalidate();
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// Callbacks to the listener if we have.
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if (mOnSelectListener != null) {
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mOnSelectListener.onSelect(mSelectedIndex);
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}
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}
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}
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/** Sets the callback to monitor the selected group index. */
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public void setOnSelectListener(BatteryChartView.OnSelectListener listener) {
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mOnSelectListener = listener;
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}
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/** Sets the companion {@link TextView} for percentage information. */
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public void setCompanionTextView(TextView textView) {
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if (textView != null) {
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// Pre-draws the view first to load style atttributions into paint.
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textView.draw(new Canvas());
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mTextPaint = textView.getPaint();
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} else {
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mTextPaint = null;
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}
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requestLayout();
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}
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/** Sets timestamps for drawing into x-axis information. */
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public void setTimestamps(String[] timestamps) {
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mTimestamps = timestamps;
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if (timestamps != null
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&& timestamps.length != DEFAULT_TIMESTAMP_COUNT) {
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mTimestamps = null;
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}
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requestLayout();
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}
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@Override
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public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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// Measures text bounds and updates indent configuration.
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if (mTextPaint != null) {
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for (int index = 0; index < PERCENTAGES.length; index++) {
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mTextPaint.getTextBounds(
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PERCENTAGES[index], 0, PERCENTAGES[index].length(),
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mPercentageBounds[index]);
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}
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// Updates the indent configurations.
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mIndent.top = mPercentageBounds[0].height();
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mIndent.right = mPercentageBounds[0].width() + mTextPadding;
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if (mTimestamps != null) {
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for (int index = 0; index < DEFAULT_TIMESTAMP_COUNT; index++) {
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mTextPaint.getTextBounds(
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mTimestamps[index], 0, mTimestamps[index].length(),
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mTimestampsBounds[index]);
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}
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mIndent.bottom = mTimestampsBounds[0].height()
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+ round(mTextPadding * 1.5f);
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}
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Log.d(TAG, "setIndent:" + mPercentageBounds[0]);
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} else {
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mIndent.set(0, 0, 0, 0);
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}
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}
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@Override
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public void draw(Canvas canvas) {
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super.draw(canvas);
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drawHorizontalDividers(canvas);
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drawVerticalDividers(canvas);
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drawTrapezoids(canvas);
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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// Caches the location to calculate selected trapezoid index.
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final int action = event.getAction();
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if (action == MotionEvent.ACTION_UP) {
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mTouchUpEvent = MotionEvent.obtain(event);
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} else if (action == MotionEvent.ACTION_CANCEL) {
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mTouchUpEvent = null; // reset
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}
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return super.onTouchEvent(event);
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}
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@Override
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public void onClick(View view) {
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if (mTouchUpEvent == null) {
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Log.w(TAG, "invalid motion event for onClick() callback");
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return;
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}
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final int trapezoidIndex = getTrapezoidIndex(mTouchUpEvent.getX());
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// Ignores the click event if the level is zero.
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if (trapezoidIndex == SELECTED_INDEX_INVALID
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|| (trapezoidIndex >= 0 && mLevels[trapezoidIndex] == 0)) {
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return;
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}
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// Selects all if users click the same trapezoid item two times.
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if (trapezoidIndex == mSelectedIndex) {
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setSelectedIndex(SELECTED_INDEX_ALL);
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} else {
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setSelectedIndex(trapezoidIndex);
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}
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view.performHapticFeedback(HapticFeedbackConstants.CONTEXT_CLICK);
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}
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private void initializeColors(Context context) {
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setBackgroundColor(Color.TRANSPARENT);
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mTrapezoidSolidColor = Utils.getColorAccentDefaultColor(context);
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mTrapezoidColor = Utils.getDisabled(context, mTrapezoidSolidColor);
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// Initializes the divider line paint.
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final Resources resources = getContext().getResources();
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mDividerWidth = resources.getDimensionPixelSize(R.dimen.chartview_divider_width);
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mDividerHeight = resources.getDimensionPixelSize(R.dimen.chartview_divider_height);
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mDividerPaint = new Paint();
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mDividerPaint.setAntiAlias(true);
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mDividerPaint.setColor(mDividerColor);
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mDividerPaint.setStyle(Paint.Style.STROKE);
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mDividerPaint.setStrokeWidth(mDividerWidth);
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Log.i(TAG, "mDividerWidth:" + mDividerWidth);
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Log.i(TAG, "mDividerHeight:" + mDividerHeight);
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// Initializes the trapezoid paint.
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mTrapezoidHOffset = resources.getDimension(R.dimen.chartview_trapezoid_margin_start);
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mTrapezoidVOffset = resources.getDimension(R.dimen.chartview_trapezoid_margin_bottom);
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mTrapezoidPaint = new Paint();
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mTrapezoidPaint.setAntiAlias(true);
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mTrapezoidPaint.setColor(mTrapezoidSolidColor);
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mTrapezoidPaint.setStyle(Paint.Style.FILL);
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mTrapezoidPaint.setPathEffect(
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new CornerPathEffect(
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resources.getDimensionPixelSize(R.dimen.chartview_trapezoid_radius)));
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// Initializes for drawing text information.
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mTextPadding = resources.getDimensionPixelSize(R.dimen.chartview_text_padding);
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}
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private void drawHorizontalDividers(Canvas canvas) {
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final int width = getWidth() - mIndent.right;
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final int height = getHeight() - mIndent.top - mIndent.bottom;
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// Draws the top divider line for 100% curve.
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float offsetY = mIndent.top + mDividerWidth * .5f;
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canvas.drawLine(0, offsetY, width, offsetY, mDividerPaint);
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drawPercentage(canvas, /*index=*/ 0, offsetY);
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// Draws the center divider line for 50% curve.
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final float availableSpace =
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height - mDividerWidth * 2 - mTrapezoidVOffset - mDividerHeight;
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offsetY = mIndent.top + mDividerWidth + availableSpace * .5f;
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canvas.drawLine(0, offsetY, width, offsetY, mDividerPaint);
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drawPercentage(canvas, /*index=*/ 1, offsetY);
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// Draws the bottom divider line for 0% curve.
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offsetY = mIndent.top + (height - mDividerHeight - mDividerWidth * .5f);
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canvas.drawLine(0, offsetY, width, offsetY, mDividerPaint);
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drawPercentage(canvas, /*index=*/ 2, offsetY);
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}
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private void drawPercentage(Canvas canvas, int index, float offsetY) {
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if (mTextPaint != null) {
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canvas.drawText(
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PERCENTAGES[index],
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getWidth() - mPercentageBounds[index].width() - mPercentageBounds[index].left,
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offsetY + mPercentageBounds[index].height() *.5f,
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mTextPaint);
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}
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}
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private void drawVerticalDividers(Canvas canvas) {
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final int width = getWidth() - mIndent.right;
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final int dividerCount = mTrapezoidCount + 1;
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final float dividerSpace = dividerCount * mDividerWidth;
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final float unitWidth = (width - dividerSpace) / (float) mTrapezoidCount;
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final float bottomY = getHeight() - mIndent.bottom;
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final float startY = bottomY - mDividerHeight;
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final float trapezoidSlotOffset = mTrapezoidHOffset + mDividerWidth * .5f;
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// Draws each vertical dividers.
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float startX = mDividerWidth * .5f;
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for (int index = 0; index < dividerCount; index++) {
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canvas.drawLine(startX, startY, startX, bottomY, mDividerPaint);
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final float nextX = startX + mDividerWidth + unitWidth;
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// Updates the trapezoid slots for drawing.
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if (index < mTrapezoidSlots.length) {
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mTrapezoidSlots[index].mLeft = round(startX + trapezoidSlotOffset);
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mTrapezoidSlots[index].mRight = round(nextX - trapezoidSlotOffset);
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}
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startX = nextX;
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}
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// Draws the timestamp slot information.
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if (mTimestamps != null) {
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final float[] xOffsets = new float[DEFAULT_TIMESTAMP_COUNT];
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final float baselineX = mDividerWidth * .5f;
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final float offsetX = mDividerWidth + unitWidth;
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for (int index = 0; index < DEFAULT_TIMESTAMP_COUNT; index++) {
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xOffsets[index] = baselineX + index * offsetX * 4;
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}
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drawTimestamp(canvas, xOffsets);
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}
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}
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private void drawTimestamp(Canvas canvas, float[] xOffsets) {
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// Draws the 1st timestamp info.
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canvas.drawText(
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mTimestamps[0],
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xOffsets[0] - mTimestampsBounds[0].left,
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getTimestampY(0), mTextPaint);
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// Draws the last timestamp info.
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canvas.drawText(
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mTimestamps[3],
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xOffsets[3] - mTimestampsBounds[3].width() - mTimestampsBounds[3].left,
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getTimestampY(3), mTextPaint);
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// Draws the rest of timestamp info since it is located in the center.
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for (int index = 1; index <= 2; index++) {
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canvas.drawText(
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mTimestamps[index],
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xOffsets[index] -
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(mTimestampsBounds[index].width() - mTimestampsBounds[index].left) * .5f,
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getTimestampY(index), mTextPaint);
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}
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}
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private int getTimestampY(int index) {
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return getHeight() - mTimestampsBounds[index].height()
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- mTimestampsBounds[index].top;
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}
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private void drawTrapezoids(Canvas canvas) {
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// Ignores invalid trapezoid data.
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if (mLevels == null) {
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return;
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}
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final float trapezoidBottom =
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getHeight() - mIndent.bottom - mDividerHeight - mDividerWidth
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- mTrapezoidVOffset;
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final float availableSpace = trapezoidBottom - mDividerWidth * .5f - mIndent.top;
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final float unitHeight = availableSpace / 100f;
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// Draws all trapezoid shapes into the canvas.
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final Path trapezoidPath = new Path();
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for (int index = 0; index < mTrapezoidCount; index++) {
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// Not draws the trapezoid for corner or not initialization cases.
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if (mLevels[index] == 0 || mLevels[index + 1] == 0) {
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continue;
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}
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// Configures the trapezoid paint color.
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mTrapezoidPaint.setColor(
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mSelectedIndex == index || mSelectedIndex == SELECTED_INDEX_ALL
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? mTrapezoidSolidColor
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: mTrapezoidColor);
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final float leftTop = round(trapezoidBottom - mLevels[index] * unitHeight);
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final float rightTop = round(trapezoidBottom - mLevels[index + 1] * unitHeight);
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trapezoidPath.reset();
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trapezoidPath.moveTo(mTrapezoidSlots[index].mLeft, trapezoidBottom);
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trapezoidPath.lineTo(mTrapezoidSlots[index].mLeft, leftTop);
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trapezoidPath.lineTo(mTrapezoidSlots[index].mRight, rightTop);
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trapezoidPath.lineTo(mTrapezoidSlots[index].mRight, trapezoidBottom);
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// A tricky way to make the trapezoid shape drawing the rounded corner.
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trapezoidPath.lineTo(mTrapezoidSlots[index].mLeft, trapezoidBottom);
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trapezoidPath.lineTo(mTrapezoidSlots[index].mLeft, leftTop);
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// Draws the trapezoid shape into canvas.
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canvas.drawPath(trapezoidPath, mTrapezoidPaint);
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}
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}
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// Searches the corresponding trapezoid index from x location.
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private int getTrapezoidIndex(float x) {
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for (int index = 0; index < mTrapezoidSlots.length; index++) {
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final TrapezoidSlot slot = mTrapezoidSlots[index];
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if (x >= slot.mLeft - mTrapezoidHOffset
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&& x <= slot.mRight + mTrapezoidHOffset) {
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return index;
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}
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}
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return SELECTED_INDEX_INVALID;
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}
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// A container class for each trapezoid left and right location.
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private static final class TrapezoidSlot {
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public float mLeft;
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public float mRight;
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@Override
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public String toString() {
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return String.format(Locale.US, "TrapezoidSlot[%f,%f]", mLeft, mRight);
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}
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}
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}
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