/*
* Copyright (C) 2013 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 android.widget;
import android.animation.Animator;
import android.animation.AnimatorSet;
import android.animation.Keyframe;
import android.animation.ObjectAnimator;
import android.animation.PropertyValuesHolder;
import android.animation.ValueAnimator;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.Region;
import android.graphics.Typeface;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.IntArray;
import android.util.Log;
import android.util.MathUtils;
import android.util.StateSet;
import android.util.TypedValue;
import android.view.HapticFeedbackConstants;
import android.view.MotionEvent;
import android.view.View;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;
import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction;
import com.android.internal.R;
import com.android.internal.widget.ExploreByTouchHelper;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Locale;
/**
* View to show a clock circle picker (with one or two picking circles)
*
* @hide
*/
public class RadialTimePickerView extends View {
private static final String TAG = "RadialTimePickerView";
private static final int HOURS = 0;
private static final int MINUTES = 1;
private static final int HOURS_INNER = 2;
private static final int SELECTOR_CIRCLE = 0;
private static final int SELECTOR_DOT = 1;
private static final int SELECTOR_LINE = 2;
private static final int AM = 0;
private static final int PM = 1;
// Opaque alpha level
private static final int ALPHA_OPAQUE = 255;
// Transparent alpha level
private static final int ALPHA_TRANSPARENT = 0;
private static final int HOURS_IN_CIRCLE = 12;
private static final int MINUTES_IN_CIRCLE = 60;
private static final int DEGREES_FOR_ONE_HOUR = 360 / HOURS_IN_CIRCLE;
private static final int DEGREES_FOR_ONE_MINUTE = 360 / MINUTES_IN_CIRCLE;
private static final int[] HOURS_NUMBERS = {12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
private static final int[] HOURS_NUMBERS_24 = {0, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23};
private static final int[] MINUTES_NUMBERS = {0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55};
private static final int FADE_OUT_DURATION = 500;
private static final int FADE_IN_DURATION = 500;
private static final int[] SNAP_PREFER_30S_MAP = new int[361];
private static final int NUM_POSITIONS = 12;
private static final float[] COS_30 = new float[NUM_POSITIONS];
private static final float[] SIN_30 = new float[NUM_POSITIONS];
static {
// Prepare mapping to snap touchable degrees to selectable degrees.
preparePrefer30sMap();
final double increment = 2.0 * Math.PI / NUM_POSITIONS;
double angle = Math.PI / 2.0;
for (int i = 0; i < NUM_POSITIONS; i++) {
COS_30[i] = (float) Math.cos(angle);
SIN_30[i] = (float) Math.sin(angle);
angle += increment;
}
}
private final InvalidateUpdateListener mInvalidateUpdateListener =
new InvalidateUpdateListener();
private final String[] mHours12Texts = new String[12];
private final String[] mOuterHours24Texts = new String[12];
private final String[] mInnerHours24Texts = new String[12];
private final String[] mMinutesTexts = new String[12];
private final Paint[] mPaint = new Paint[2];
private final IntHolder[] mAlpha = new IntHolder[2];
private final Paint mPaintCenter = new Paint();
private final Paint[][] mPaintSelector = new Paint[2][3];
private final int mSelectorColor;
private final int mSelectorDotColor;
private final Paint mPaintBackground = new Paint();
private final Typeface mTypeface;
private final ColorStateList[] mTextColor = new ColorStateList[3];
private final int[] mTextSize = new int[3];
private final int[] mTextInset = new int[3];
private final float[][] mOuterTextX = new float[2][12];
private final float[][] mOuterTextY = new float[2][12];
private final float[] mInnerTextX = new float[12];
private final float[] mInnerTextY = new float[12];
private final int[] mSelectionDegrees = new int[2];
private final ArrayList<Animator> mHoursToMinutesAnims = new ArrayList<>();
private final ArrayList<Animator> mMinuteToHoursAnims = new ArrayList<>();
private final RadialPickerTouchHelper mTouchHelper;
private final Path mSelectorPath = new Path();
private boolean mIs24HourMode;
private boolean mShowHours;
/**
* When in 24-hour mode, indicates that the current hour is between
* 1 and 12 (inclusive).
*/
private boolean mIsOnInnerCircle;
private int mSelectorRadius;
private int mSelectorStroke;
private int mSelectorDotRadius;
private int mCenterDotRadius;
private int mXCenter;
private int mYCenter;
private int mCircleRadius;
private int mMinDistForInnerNumber;
private int mMaxDistForOuterNumber;
private int mHalfwayDist;
private String[] mOuterTextHours;
private String[] mInnerTextHours;
private String[] mMinutesText;
private AnimatorSet mTransition;
private int mAmOrPm;
private float mDisabledAlpha;
private OnValueSelectedListener mListener;
private boolean mInputEnabled = true;
public interface OnValueSelectedListener {
void onValueSelected(int pickerIndex, int newValue, boolean autoAdvance);
}
/**
* Split up the 360 degrees of the circle among the 60 selectable values. Assigns a larger
* selectable area to each of the 12 visible values, such that the ratio of space apportioned
* to a visible value : space apportioned to a non-visible value will be 14 : 4.
* E.g. the output of 30 degrees should have a higher range of input associated with it than
* the output of 24 degrees, because 30 degrees corresponds to a visible number on the clock
* circle (5 on the minutes, 1 or 13 on the hours).
*/
private static void preparePrefer30sMap() {
// We'll split up the visible output and the non-visible output such that each visible
// output will correspond to a range of 14 associated input degrees, and each non-visible
// output will correspond to a range of 4 associate input degrees, so visible numbers
// are more than 3 times easier to get than non-visible numbers:
// {354-359,0-7}:0, {8-11}:6, {12-15}:12, {16-19}:18, {20-23}:24, {24-37}:30, etc.
//
// If an output of 30 degrees should correspond to a range of 14 associated degrees, then
// we'll need any input between 24 - 37 to snap to 30. Working out from there, 20-23 should
// snap to 24, while 38-41 should snap to 36. This is somewhat counter-intuitive, that you
// can be touching 36 degrees but have the selection snapped to 30 degrees; however, this
// inconsistency isn't noticeable at such fine-grained degrees, and it affords us the
// ability to aggressively prefer the visible values by a factor of more than 3:1, which
// greatly contributes to the selectability of these values.
// The first output is 0, and each following output will increment by 6 {0, 6, 12, ...}.
int snappedOutputDegrees = 0;
// Count of how many inputs we've designated to the specified output.
int count = 1;
// How many input we expect for a specified output. This will be 14 for output divisible
// by 30, and 4 for the remaining output. We'll special case the outputs of 0 and 360, so
// the caller can decide which they need.
int expectedCount = 8;
// Iterate through the input.
for (int degrees = 0; degrees < 361; degrees++) {
// Save the input-output mapping.
SNAP_PREFER_30S_MAP[degrees] = snappedOutputDegrees;
// If this is the last input for the specified output, calculate the next output and
// the next expected count.
if (count == expectedCount) {
snappedOutputDegrees += 6;
if (snappedOutputDegrees == 360) {
expectedCount = 7;
} else if (snappedOutputDegrees % 30 == 0) {
expectedCount = 14;
} else {
expectedCount = 4;
}
count = 1;
} else {
count++;
}
}
}
/**
* Returns mapping of any input degrees (0 to 360) to one of 60 selectable output degrees,
* where the degrees corresponding to visible numbers (i.e. those divisible by 30) will be
* weighted heavier than the degrees corresponding to non-visible numbers.
* See {@link #preparePrefer30sMap()} documentation for the rationale and generation of the
* mapping.
*/
private static int snapPrefer30s(int degrees) {
if (SNAP_PREFER_30S_MAP == null) {
return -1;
}
return SNAP_PREFER_30S_MAP[degrees];
}
/**
* Returns mapping of any input degrees (0 to 360) to one of 12 visible output degrees (all
* multiples of 30), where the input will be "snapped" to the closest visible degrees.
* @param degrees The input degrees
* @param forceHigherOrLower The output may be forced to either the higher or lower step, or may
* be allowed to snap to whichever is closer. Use 1 to force strictly higher, -1 to force
* strictly lower, and 0 to snap to the closer one.
* @return output degrees, will be a multiple of 30
*/
private static int snapOnly30s(int degrees, int forceHigherOrLower) {
final int stepSize = DEGREES_FOR_ONE_HOUR;
int floor = (degrees / stepSize) * stepSize;
final int ceiling = floor + stepSize;
if (forceHigherOrLower == 1) {
degrees = ceiling;
} else if (forceHigherOrLower == -1) {
if (degrees == floor) {
floor -= stepSize;
}
degrees = floor;
} else {
if ((degrees - floor) < (ceiling - degrees)) {
degrees = floor;
} else {
degrees = ceiling;
}
}
return degrees;
}
@SuppressWarnings("unused")
public RadialTimePickerView(Context context) {
this(context, null);
}
public RadialTimePickerView(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.timePickerStyle);
}
public RadialTimePickerView(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
public RadialTimePickerView(
Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs);
// Pull disabled alpha from theme.
final TypedValue outValue = new TypedValue();
context.getTheme().resolveAttribute(android.R.attr.disabledAlpha, outValue, true);
mDisabledAlpha = outValue.getFloat();
// process style attributes
final Resources res = getResources();
final TypedArray a = mContext.obtainStyledAttributes(attrs, R.styleable.TimePicker,
defStyleAttr, defStyleRes);
mTypeface = Typeface.create("sans-serif", Typeface.NORMAL);
// Initialize all alpha values to opaque.
for (int i = 0; i < mAlpha.length; i++) {
mAlpha[i] = new IntHolder(ALPHA_OPAQUE);
}
mTextColor[HOURS] = a.getColorStateList(R.styleable.TimePicker_numbersTextColor);
mTextColor[HOURS_INNER] = a.getColorStateList(R.styleable.TimePicker_numbersInnerTextColor);
mTextColor[MINUTES] = mTextColor[HOURS];
mPaint[HOURS] = new Paint();
mPaint[HOURS].setAntiAlias(true);
mPaint[HOURS].setTextAlign(Paint.Align.CENTER);
mPaint[MINUTES] = new Paint();
mPaint[MINUTES].setAntiAlias(true);
mPaint[MINUTES].setTextAlign(Paint.Align.CENTER);
final ColorStateList selectorColors = a.getColorStateList(
R.styleable.TimePicker_numbersSelectorColor);
final int selectorActivatedColor = selectorColors.getColorForState(
StateSet.get(StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_ACTIVATED), 0);
mPaintCenter.setColor(selectorActivatedColor);
mPaintCenter.setAntiAlias(true);
final int[] activatedStateSet = StateSet.get(
StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_ACTIVATED);
mSelectorColor = selectorActivatedColor;
mSelectorDotColor = mTextColor[HOURS].getColorForState(activatedStateSet, 0);
mPaintSelector[HOURS][SELECTOR_CIRCLE] = new Paint();
mPaintSelector[HOURS][SELECTOR_CIRCLE].setAntiAlias(true);
mPaintSelector[HOURS][SELECTOR_DOT] = new Paint();
mPaintSelector[HOURS][SELECTOR_DOT].setAntiAlias(true);
mPaintSelector[HOURS][SELECTOR_LINE] = new Paint();
mPaintSelector[HOURS][SELECTOR_LINE].setAntiAlias(true);
mPaintSelector[HOURS][SELECTOR_LINE].setStrokeWidth(2);
mPaintSelector[MINUTES][SELECTOR_CIRCLE] = new Paint();
mPaintSelector[MINUTES][SELECTOR_CIRCLE].setAntiAlias(true);
mPaintSelector[MINUTES][SELECTOR_DOT] = new Paint();
mPaintSelector[MINUTES][SELECTOR_DOT].setAntiAlias(true);
mPaintSelector[MINUTES][SELECTOR_LINE] = new Paint();
mPaintSelector[MINUTES][SELECTOR_LINE].setAntiAlias(true);
mPaintSelector[MINUTES][SELECTOR_LINE].setStrokeWidth(2);
mPaintBackground.setColor(a.getColor(R.styleable.TimePicker_numbersBackgroundColor,
context.getColor(R.color.timepicker_default_numbers_background_color_material)));
mPaintBackground.setAntiAlias(true);
mSelectorRadius = res.getDimensionPixelSize(R.dimen.timepicker_selector_radius);
mSelectorStroke = res.getDimensionPixelSize(R.dimen.timepicker_selector_stroke);
mSelectorDotRadius = res.getDimensionPixelSize(R.dimen.timepicker_selector_dot_radius);
mCenterDotRadius = res.getDimensionPixelSize(R.dimen.timepicker_center_dot_radius);
mTextSize[HOURS] = res.getDimensionPixelSize(R.dimen.timepicker_text_size_normal);
mTextSize[MINUTES] = res.getDimensionPixelSize(R.dimen.timepicker_text_size_normal);
mTextSize[HOURS_INNER] = res.getDimensionPixelSize(R.dimen.timepicker_text_size_inner);
mTextInset[HOURS] = res.getDimensionPixelSize(R.dimen.timepicker_text_inset_normal);
mTextInset[MINUTES] = res.getDimensionPixelSize(R.dimen.timepicker_text_inset_normal);
mTextInset[HOURS_INNER] = res.getDimensionPixelSize(R.dimen.timepicker_text_inset_inner);
mShowHours = true;
mIs24HourMode = false;
mAmOrPm = AM;
// Set up accessibility components.
mTouchHelper = new RadialPickerTouchHelper();
setAccessibilityDelegate(mTouchHelper);
if (getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES);
}
initHoursAndMinutesText();
initData();
a.recycle();
// Initial values
final Calendar calendar = Calendar.getInstance(Locale.getDefault());
final int currentHour = calendar.get(Calendar.HOUR_OF_DAY);
final int currentMinute = calendar.get(Calendar.MINUTE);
setCurrentHourInternal(currentHour, false, false);
setCurrentMinuteInternal(currentMinute, false);
setHapticFeedbackEnabled(true);
}
public void initialize(int hour, int minute, boolean is24HourMode) {
if (mIs24HourMode != is24HourMode) {
mIs24HourMode = is24HourMode;
initData();
}
setCurrentHourInternal(hour, false, false);
setCurrentMinuteInternal(minute, false);
}
public void setCurrentItemShowing(int item, boolean animate) {
switch (item){
case HOURS:
showHours(animate);
break;
case MINUTES:
showMinutes(animate);
break;
default:
Log.e(TAG, "ClockView does not support showing item " + item);
}
}
public int getCurrentItemShowing() {
return mShowHours ? HOURS : MINUTES;
}
public void setOnValueSelectedListener(OnValueSelectedListener listener) {
mListener = listener;
}
/**
* Sets the current hour in 24-hour time.
*
* @param hour the current hour between 0 and 23 (inclusive)
*/
public void setCurrentHour(int hour) {
setCurrentHourInternal(hour, true, false);
}
/**
* Sets the current hour.
*
* @param hour The current hour
* @param callback Whether the value listener should be invoked
* @param autoAdvance Whether the listener should auto-advance to the next
* selection mode, e.g. hour to minutes
*/
private void setCurrentHourInternal(int hour, boolean callback, boolean autoAdvance) {
final int degrees = (hour % 12) * DEGREES_FOR_ONE_HOUR;
mSelectionDegrees[HOURS] = degrees;
// 0 is 12 AM (midnight) and 12 is 12 PM (noon).
final int amOrPm = (hour == 0 || (hour % 24) < 12) ? AM : PM;
final boolean isOnInnerCircle = getInnerCircleForHour(hour);
if (mAmOrPm != amOrPm || mIsOnInnerCircle != isOnInnerCircle) {
mAmOrPm = amOrPm;
mIsOnInnerCircle = isOnInnerCircle;
initData();
mTouchHelper.invalidateRoot();
}
invalidate();
if (callback && mListener != null) {
mListener.onValueSelected(HOURS, hour, autoAdvance);
}
}
/**
* Returns the current hour in 24-hour time.
*
* @return the current hour between 0 and 23 (inclusive)
*/
public int getCurrentHour() {
return getHourForDegrees(mSelectionDegrees[HOURS], mIsOnInnerCircle);
}
private int getHourForDegrees(int degrees, boolean innerCircle) {
int hour = (degrees / DEGREES_FOR_ONE_HOUR) % 12;
if (mIs24HourMode) {
// Convert the 12-hour value into 24-hour time based on where the
// selector is positioned.
if (!innerCircle && hour == 0) {
// Outer circle is 1 through 12.
hour = 12;
} else if (innerCircle && hour != 0) {
// Inner circle is 13 through 23 and 0.
hour += 12;
}
} else if (mAmOrPm == PM) {
hour += 12;
}
return hour;
}
/**
* @param hour the hour in 24-hour time or 12-hour time
*/
private int getDegreesForHour(int hour) {
// Convert to be 0-11.
if (mIs24HourMode) {
if (hour >= 12) {
hour -= 12;
}
} else if (hour == 12) {
hour = 0;
}
return hour * DEGREES_FOR_ONE_HOUR;
}
/**
* @param hour the hour in 24-hour time or 12-hour time
*/
private boolean getInnerCircleForHour(int hour) {
return mIs24HourMode && (hour == 0 || hour > 12);
}
public void setCurrentMinute(int minute) {
setCurrentMinuteInternal(minute, true);
}
private void setCurrentMinuteInternal(int minute, boolean callback) {
mSelectionDegrees[MINUTES] = (minute % MINUTES_IN_CIRCLE) * DEGREES_FOR_ONE_MINUTE;
invalidate();
if (callback && mListener != null) {
mListener.onValueSelected(MINUTES, minute, false);
}
}
// Returns minutes in 0-59 range
public int getCurrentMinute() {
return getMinuteForDegrees(mSelectionDegrees[MINUTES]);
}
private int getMinuteForDegrees(int degrees) {
return degrees / DEGREES_FOR_ONE_MINUTE;
}
private int getDegreesForMinute(int minute) {
return minute * DEGREES_FOR_ONE_MINUTE;
}
public void setAmOrPm(int val) {
mAmOrPm = (val % 2);
invalidate();
mTouchHelper.invalidateRoot();
}
public int getAmOrPm() {
return mAmOrPm;
}
public void showHours(boolean animate) {
if (mShowHours) {
return;
}
mShowHours = true;
if (animate) {
startMinutesToHoursAnimation();
}
initData();
invalidate();
mTouchHelper.invalidateRoot();
}
public void showMinutes(boolean animate) {
if (!mShowHours) {
return;
}
mShowHours = false;
if (animate) {
startHoursToMinutesAnimation();
}
initData();
invalidate();
mTouchHelper.invalidateRoot();
}
private void initHoursAndMinutesText() {
// Initialize the hours and minutes numbers.
for (int i = 0; i < 12; i++) {
mHours12Texts[i] = String.format("%d", HOURS_NUMBERS[i]);
mInnerHours24Texts[i] = String.format("%02d", HOURS_NUMBERS_24[i]);
mOuterHours24Texts[i] = String.format("%d", HOURS_NUMBERS[i]);
mMinutesTexts[i] = String.format("%02d", MINUTES_NUMBERS[i]);
}
}
private void initData() {
if (mIs24HourMode) {
mOuterTextHours = mOuterHours24Texts;
mInnerTextHours = mInnerHours24Texts;
} else {
mOuterTextHours = mHours12Texts;
mInnerTextHours = mHours12Texts;
}
mMinutesText = mMinutesTexts;
final int hoursAlpha = mShowHours ? ALPHA_OPAQUE : ALPHA_TRANSPARENT;
mAlpha[HOURS].setValue(hoursAlpha);
final int minutesAlpha = mShowHours ? ALPHA_TRANSPARENT : ALPHA_OPAQUE;
mAlpha[MINUTES].setValue(minutesAlpha);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
if (!changed) {
return;
}
mXCenter = getWidth() / 2;
mYCenter = getHeight() / 2;
mCircleRadius = Math.min(mXCenter, mYCenter);
mMinDistForInnerNumber = mCircleRadius - mTextInset[HOURS_INNER] - mSelectorRadius;
mMaxDistForOuterNumber = mCircleRadius - mTextInset[HOURS] + mSelectorRadius;
mHalfwayDist = mCircleRadius - (mTextInset[HOURS] + mTextInset[HOURS_INNER]) / 2;
calculatePositionsHours();
calculatePositionsMinutes();
mTouchHelper.invalidateRoot();
}
@Override
public void onDraw(Canvas canvas) {
final float alphaMod = mInputEnabled ? 1 : mDisabledAlpha;
drawCircleBackground(canvas);
drawHours(canvas, alphaMod);
drawMinutes(canvas, alphaMod);
drawCenter(canvas, alphaMod);
}
private void drawCircleBackground(Canvas canvas) {
canvas.drawCircle(mXCenter, mYCenter, mCircleRadius, mPaintBackground);
}
private void drawHours(Canvas canvas, float alphaMod) {
final int hoursAlpha = (int) (mAlpha[HOURS].getValue() * alphaMod + 0.5f);
if (hoursAlpha > 0) {
// Draw the hour selector under the elements.
drawSelector(canvas, mIsOnInnerCircle ? HOURS_INNER : HOURS, null, alphaMod);
// Draw outer hours.
drawTextElements(canvas, mTextSize[HOURS], mTypeface, mTextColor[HOURS],
mOuterTextHours, mOuterTextX[HOURS], mOuterTextY[HOURS], mPaint[HOURS],
hoursAlpha, !mIsOnInnerCircle, mSelectionDegrees[HOURS], false);
// Draw inner hours (13-00) for 24-hour time.
if (mIs24HourMode && mInnerTextHours != null) {
drawTextElements(canvas, mTextSize[HOURS_INNER], mTypeface, mTextColor[HOURS_INNER],
mInnerTextHours, mInnerTextX, mInnerTextY, mPaint[HOURS], hoursAlpha,
mIsOnInnerCircle, mSelectionDegrees[HOURS], false);
}
}
}
private void drawMinutes(Canvas canvas, float alphaMod) {
final int minutesAlpha = (int) (mAlpha[MINUTES].getValue() * alphaMod + 0.5f);
if (minutesAlpha > 0) {
// Draw the minute selector under the elements.
drawSelector(canvas, MINUTES, mSelectorPath, alphaMod);
// Exclude the selector region, then draw minutes with no
// activated states.
canvas.save(Canvas.CLIP_SAVE_FLAG);
canvas.clipPath(mSelectorPath, Region.Op.DIFFERENCE);
drawTextElements(canvas, mTextSize[MINUTES], mTypeface, mTextColor[MINUTES],
mMinutesText, mOuterTextX[MINUTES], mOuterTextY[MINUTES], mPaint[MINUTES],
minutesAlpha, false, 0, false);
canvas.restore();
// Intersect the selector region, then draw minutes with only
// activated states.
canvas.save(Canvas.CLIP_SAVE_FLAG);
canvas.clipPath(mSelectorPath, Region.Op.INTERSECT);
drawTextElements(canvas, mTextSize[MINUTES], mTypeface, mTextColor[MINUTES],
mMinutesText, mOuterTextX[MINUTES], mOuterTextY[MINUTES], mPaint[MINUTES],
minutesAlpha, true, mSelectionDegrees[MINUTES], true);
canvas.restore();
}
}
private void drawCenter(Canvas canvas, float alphaMod) {
mPaintCenter.setAlpha((int) (255 * alphaMod + 0.5f));
canvas.drawCircle(mXCenter, mYCenter, mCenterDotRadius, mPaintCenter);
}
private int applyAlpha(int argb, int alpha) {
final int srcAlpha = (argb >> 24) & 0xFF;
final int dstAlpha = (int) (srcAlpha * (alpha / 255.0) + 0.5f);
return (0xFFFFFF & argb) | (dstAlpha << 24);
}
private int getMultipliedAlpha(int argb, int alpha) {
return (int) (Color.alpha(argb) * (alpha / 255.0) + 0.5);
}
private void drawSelector(Canvas canvas, int index, Path selectorPath, float alphaMod) {
final int alpha = (int) (mAlpha[index % 2].getValue() * alphaMod + 0.5f);
final int color = applyAlpha(mSelectorColor, alpha);
// Calculate the current radius at which to place the selection circle.
final int selRadius = mSelectorRadius;
final int selLength = mCircleRadius - mTextInset[index];
final double selAngleRad = Math.toRadians(mSelectionDegrees[index % 2]);
final float selCenterX = mXCenter + selLength * (float) Math.sin(selAngleRad);
final float selCenterY = mYCenter - selLength * (float) Math.cos(selAngleRad);
// Draw the selection circle.
final Paint paint = mPaintSelector[index % 2][SELECTOR_CIRCLE];
paint.setColor(color);
canvas.drawCircle(selCenterX, selCenterY, selRadius, paint);
// If needed, set up the clip path for later.
if (selectorPath != null) {
selectorPath.reset();
selectorPath.addCircle(selCenterX, selCenterY, selRadius, Path.Direction.CCW);
}
// Draw the dot if we're between two items.
final boolean shouldDrawDot = mSelectionDegrees[index % 2] % 30 != 0;
if (shouldDrawDot) {
final Paint dotPaint = mPaintSelector[index % 2][SELECTOR_DOT];
dotPaint.setColor(mSelectorDotColor);
canvas.drawCircle(selCenterX, selCenterY, mSelectorDotRadius, dotPaint);
}
// Shorten the line to only go from the edge of the center dot to the
// edge of the selection circle.
final double sin = Math.sin(selAngleRad);
final double cos = Math.cos(selAngleRad);
final int lineLength = selLength - selRadius;
final int centerX = mXCenter + (int) (mCenterDotRadius * sin);
final int centerY = mYCenter - (int) (mCenterDotRadius * cos);
final float linePointX = centerX + (int) (lineLength * sin);
final float linePointY = centerY - (int) (lineLength * cos);
// Draw the line.
final Paint linePaint = mPaintSelector[index % 2][SELECTOR_LINE];
linePaint.setColor(color);
linePaint.setStrokeWidth(mSelectorStroke);
canvas.drawLine(mXCenter, mYCenter, linePointX, linePointY, linePaint);
}
private void calculatePositionsHours() {
// Calculate the text positions
final float numbersRadius = mCircleRadius - mTextInset[HOURS];
// Calculate the positions for the 12 numbers in the main circle.
calculatePositions(mPaint[HOURS], numbersRadius, mXCenter, mYCenter,
mTextSize[HOURS], mOuterTextX[HOURS], mOuterTextY[HOURS]);
// If we have an inner circle, calculate those positions too.
if (mIs24HourMode) {
final int innerNumbersRadius = mCircleRadius - mTextInset[HOURS_INNER];
calculatePositions(mPaint[HOURS], innerNumbersRadius, mXCenter, mYCenter,
mTextSize[HOURS_INNER], mInnerTextX, mInnerTextY);
}
}
private void calculatePositionsMinutes() {
// Calculate the text positions
final float numbersRadius = mCircleRadius - mTextInset[MINUTES];
// Calculate the positions for the 12 numbers in the main circle.
calculatePositions(mPaint[MINUTES], numbersRadius, mXCenter, mYCenter,
mTextSize[MINUTES], mOuterTextX[MINUTES], mOuterTextY[MINUTES]);
}
/**
* Using the trigonometric Unit Circle, calculate the positions that the text will need to be
* drawn at based on the specified circle radius. Place the values in the textGridHeights and
* textGridWidths parameters.
*/
private static void calculatePositions(Paint paint, float radius, float xCenter, float yCenter,
float textSize, float[] x, float[] y) {
// Adjust yCenter to account for the text's baseline.
paint.setTextSize(textSize);
yCenter -= (paint.descent() + paint.ascent()) / 2;
for (int i = 0; i < NUM_POSITIONS; i++) {
x[i] = xCenter - radius * COS_30[i];
y[i] = yCenter - radius * SIN_30[i];
}
}
/**
* Draw the 12 text values at the positions specified by the textGrid parameters.
*/
private void drawTextElements(Canvas canvas, float textSize, Typeface typeface,
ColorStateList textColor, String[] texts, float[] textX, float[] textY, Paint paint,
int alpha, boolean showActivated, int activatedDegrees, boolean activatedOnly) {
paint.setTextSize(textSize);
paint.setTypeface(typeface);
// The activated index can touch a range of elements.
final float activatedIndex = activatedDegrees / (360.0f / NUM_POSITIONS);
final int activatedFloor = (int) activatedIndex;
final int activatedCeil = ((int) Math.ceil(activatedIndex)) % NUM_POSITIONS;
for (int i = 0; i < 12; i++) {
final boolean activated = (activatedFloor == i || activatedCeil == i);
if (activatedOnly && !activated) {
continue;
}
final int stateMask = StateSet.VIEW_STATE_ENABLED
| (showActivated && activated ? StateSet.VIEW_STATE_ACTIVATED : 0);
final int color = textColor.getColorForState(StateSet.get(stateMask), 0);
paint.setColor(color);
paint.setAlpha(getMultipliedAlpha(color, alpha));
canvas.drawText(texts[i], textX[i], textY[i], paint);
}
}
private static ObjectAnimator getFadeOutAnimator(IntHolder target, int startAlpha, int endAlpha,
InvalidateUpdateListener updateListener) {
final ObjectAnimator animator = ObjectAnimator.ofInt(target, "value", startAlpha, endAlpha);
animator.setDuration(FADE_OUT_DURATION);
animator.addUpdateListener(updateListener);
return animator;
}
private static ObjectAnimator getFadeInAnimator(IntHolder target, int startAlpha, int endAlpha,
InvalidateUpdateListener updateListener) {
final float delayMultiplier = 0.25f;
final float transitionDurationMultiplier = 1f;
final float totalDurationMultiplier = transitionDurationMultiplier + delayMultiplier;
final int totalDuration = (int) (FADE_IN_DURATION * totalDurationMultiplier);
final float delayPoint = (delayMultiplier * FADE_IN_DURATION) / totalDuration;
final Keyframe kf0, kf1, kf2;
kf0 = Keyframe.ofInt(0f, startAlpha);
kf1 = Keyframe.ofInt(delayPoint, startAlpha);
kf2 = Keyframe.ofInt(1f, endAlpha);
final PropertyValuesHolder fadeIn = PropertyValuesHolder.ofKeyframe("value", kf0, kf1, kf2);
final ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(target, fadeIn);
animator.setDuration(totalDuration);
animator.addUpdateListener(updateListener);
return animator;
}
private class InvalidateUpdateListener implements ValueAnimator.AnimatorUpdateListener {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
RadialTimePickerView.this.invalidate();
}
}
private void startHoursToMinutesAnimation() {
if (mHoursToMinutesAnims.size() == 0) {
mHoursToMinutesAnims.add(getFadeOutAnimator(mAlpha[HOURS],
ALPHA_OPAQUE, ALPHA_TRANSPARENT, mInvalidateUpdateListener));
mHoursToMinutesAnims.add(getFadeInAnimator(mAlpha[MINUTES],
ALPHA_TRANSPARENT, ALPHA_OPAQUE, mInvalidateUpdateListener));
}
if (mTransition != null && mTransition.isRunning()) {
mTransition.end();
}
mTransition = new AnimatorSet();
mTransition.playTogether(mHoursToMinutesAnims);
mTransition.start();
}
private void startMinutesToHoursAnimation() {
if (mMinuteToHoursAnims.size() == 0) {
mMinuteToHoursAnims.add(getFadeOutAnimator(mAlpha[MINUTES],
ALPHA_OPAQUE, ALPHA_TRANSPARENT, mInvalidateUpdateListener));
mMinuteToHoursAnims.add(getFadeInAnimator(mAlpha[HOURS],
ALPHA_TRANSPARENT, ALPHA_OPAQUE, mInvalidateUpdateListener));
}
if (mTransition != null && mTransition.isRunning()) {
mTransition.end();
}
mTransition = new AnimatorSet();
mTransition.playTogether(mMinuteToHoursAnims);
mTransition.start();
}
private int getDegreesFromXY(float x, float y, boolean constrainOutside) {
// Ensure the point is inside the touchable area.
final int innerBound;
final int outerBound;
if (mIs24HourMode && mShowHours) {
innerBound = mMinDistForInnerNumber;
outerBound = mMaxDistForOuterNumber;
} else {
final int index = mShowHours ? HOURS : MINUTES;
final int center = mCircleRadius - mTextInset[index];
innerBound = center - mSelectorRadius;
outerBound = center + mSelectorRadius;
}
final double dX = x - mXCenter;
final double dY = y - mYCenter;
final double distFromCenter = Math.sqrt(dX * dX + dY * dY);
if (distFromCenter < innerBound || constrainOutside && distFromCenter > outerBound) {
return -1;
}
// Convert to degrees.
final int degrees = (int) (Math.toDegrees(Math.atan2(dY, dX) + Math.PI / 2) + 0.5);
if (degrees < 0) {
return degrees + 360;
} else {
return degrees;
}
}
private boolean getInnerCircleFromXY(float x, float y) {
if (mIs24HourMode && mShowHours) {
final double dX = x - mXCenter;
final double dY = y - mYCenter;
final double distFromCenter = Math.sqrt(dX * dX + dY * dY);
return distFromCenter <= mHalfwayDist;
}
return false;
}
boolean mChangedDuringTouch = false;
@Override
public boolean onTouchEvent(MotionEvent event) {
if (!mInputEnabled) {
return true;
}
final int action = event.getActionMasked();
if (action == MotionEvent.ACTION_MOVE
|| action == MotionEvent.ACTION_UP
|| action == MotionEvent.ACTION_DOWN) {
boolean forceSelection = false;
boolean autoAdvance = false;
if (action == MotionEvent.ACTION_DOWN) {
// This is a new event stream, reset whether the value changed.
mChangedDuringTouch = false;
} else if (action == MotionEvent.ACTION_UP) {
autoAdvance = true;
// If we saw a down/up pair without the value changing, assume
// this is a single-tap selection and force a change.
if (!mChangedDuringTouch) {
forceSelection = true;
}
}
mChangedDuringTouch |= handleTouchInput(
event.getX(), event.getY(), forceSelection, autoAdvance);
}
return true;
}
private boolean handleTouchInput(
float x, float y, boolean forceSelection, boolean autoAdvance) {
final boolean isOnInnerCircle = getInnerCircleFromXY(x, y);
final int degrees = getDegreesFromXY(x, y, false);
if (degrees == -1) {
return false;
}
final int type;
final int newValue;
final boolean valueChanged;
if (mShowHours) {
final int snapDegrees = snapOnly30s(degrees, 0) % 360;
valueChanged = mIsOnInnerCircle != isOnInnerCircle
|| mSelectionDegrees[HOURS] != snapDegrees;
mIsOnInnerCircle = isOnInnerCircle;
mSelectionDegrees[HOURS] = snapDegrees;
type = HOURS;
newValue = getCurrentHour();
} else {
final int snapDegrees = snapPrefer30s(degrees) % 360;
valueChanged = mSelectionDegrees[MINUTES] != snapDegrees;
mSelectionDegrees[MINUTES] = snapDegrees;
type = MINUTES;
newValue = getCurrentMinute();
}
if (valueChanged || forceSelection || autoAdvance) {
// Fire the listener even if we just need to auto-advance.
if (mListener != null) {
mListener.onValueSelected(type, newValue, autoAdvance);
}
// Only provide feedback if the value actually changed.
if (valueChanged || forceSelection) {
performHapticFeedback(HapticFeedbackConstants.CLOCK_TICK);
invalidate();
}
return true;
}
return false;
}
@Override
public boolean dispatchHoverEvent(MotionEvent event) {
// First right-of-refusal goes the touch exploration helper.
if (mTouchHelper.dispatchHoverEvent(event)) {
return true;
}
return super.dispatchHoverEvent(event);
}
public void setInputEnabled(boolean inputEnabled) {
mInputEnabled = inputEnabled;
invalidate();
}
private class RadialPickerTouchHelper extends ExploreByTouchHelper {
private final Rect mTempRect = new Rect();
private final int TYPE_HOUR = 1;
private final int TYPE_MINUTE = 2;
private final int SHIFT_TYPE = 0;
private final int MASK_TYPE = 0xF;
private final int SHIFT_VALUE = 8;
private final int MASK_VALUE = 0xFF;
/** Increment in which virtual views are exposed for minutes. */
private final int MINUTE_INCREMENT = 5;
public RadialPickerTouchHelper() {
super(RadialTimePickerView.this);
}
@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) {
super.onInitializeAccessibilityNodeInfo(host, info);
info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_FORWARD);
info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_BACKWARD);
}
@Override
public boolean performAccessibilityAction(View host, int action, Bundle arguments) {
if (super.performAccessibilityAction(host, action, arguments)) {
return true;
}
switch (action) {
case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD:
adjustPicker(1);
return true;
case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD:
adjustPicker(-1);
return true;
}
return false;
}
private void adjustPicker(int step) {
final int stepSize;
final int initialStep;
final int maxValue;
final int minValue;
if (mShowHours) {
stepSize = 1;
final int currentHour24 = getCurrentHour();
if (mIs24HourMode) {
initialStep = currentHour24;
minValue = 0;
maxValue = 23;
} else {
initialStep = hour24To12(currentHour24);
minValue = 1;
maxValue = 12;
}
} else {
stepSize = 5;
initialStep = getCurrentMinute() / stepSize;
minValue = 0;
maxValue = 55;
}
final int nextValue = (initialStep + step) * stepSize;
final int clampedValue = MathUtils.constrain(nextValue, minValue, maxValue);
if (mShowHours) {
setCurrentHour(clampedValue);
} else {
setCurrentMinute(clampedValue);
}
}
@Override
protected int getVirtualViewAt(float x, float y) {
final int id;
final int degrees = getDegreesFromXY(x, y, true);
if (degrees != -1) {
final int snapDegrees = snapOnly30s(degrees, 0) % 360;
if (mShowHours) {
final boolean isOnInnerCircle = getInnerCircleFromXY(x, y);
final int hour24 = getHourForDegrees(snapDegrees, isOnInnerCircle);
final int hour = mIs24HourMode ? hour24 : hour24To12(hour24);
id = makeId(TYPE_HOUR, hour);
} else {
final int current = getCurrentMinute();
final int touched = getMinuteForDegrees(degrees);
final int snapped = getMinuteForDegrees(snapDegrees);
// If the touched minute is closer to the current minute
// than it is to the snapped minute, return current.
final int currentOffset = getCircularDiff(current, touched, MINUTES_IN_CIRCLE);
final int snappedOffset = getCircularDiff(snapped, touched, MINUTES_IN_CIRCLE);
final int minute;
if (currentOffset < snappedOffset) {
minute = current;
} else {
minute = snapped;
}
id = makeId(TYPE_MINUTE, minute);
}
} else {
id = INVALID_ID;
}
return id;
}
/**
* Returns the difference in degrees between two values along a circle.
*
* @param first value in the range [0,max]
* @param second value in the range [0,max]
* @param max the maximum value along the circle
* @return the difference in between the two values
*/
private int getCircularDiff(int first, int second, int max) {
final int diff = Math.abs(first - second);
final int midpoint = max / 2;
return (diff > midpoint) ? (max - diff) : diff;
}
@Override
protected void getVisibleVirtualViews(IntArray virtualViewIds) {
if (mShowHours) {
final int min = mIs24HourMode ? 0 : 1;
final int max = mIs24HourMode ? 23 : 12;
for (int i = min; i <= max ; i++) {
virtualViewIds.add(makeId(TYPE_HOUR, i));
}
} else {
final int current = getCurrentMinute();
for (int i = 0; i < MINUTES_IN_CIRCLE; i += MINUTE_INCREMENT) {
virtualViewIds.add(makeId(TYPE_MINUTE, i));
// If the current minute falls between two increments,
// insert an extra node for it.
if (current > i && current < i + MINUTE_INCREMENT) {
virtualViewIds.add(makeId(TYPE_MINUTE, current));
}
}
}
}
@Override
protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
event.setClassName(getClass().getName());
final int type = getTypeFromId(virtualViewId);
final int value = getValueFromId(virtualViewId);
final CharSequence description = getVirtualViewDescription(type, value);
event.setContentDescription(description);
}
@Override
protected void onPopulateNodeForVirtualView(int virtualViewId, AccessibilityNodeInfo node) {
node.setClassName(getClass().getName());
node.addAction(AccessibilityAction.ACTION_CLICK);
final int type = getTypeFromId(virtualViewId);
final int value = getValueFromId(virtualViewId);
final CharSequence description = getVirtualViewDescription(type, value);
node.setContentDescription(description);
getBoundsForVirtualView(virtualViewId, mTempRect);
node.setBoundsInParent(mTempRect);
final boolean selected = isVirtualViewSelected(type, value);
node.setSelected(selected);
final int nextId = getVirtualViewIdAfter(type, value);
if (nextId != INVALID_ID) {
node.setTraversalBefore(RadialTimePickerView.this, nextId);
}
}
private int getVirtualViewIdAfter(int type, int value) {
if (type == TYPE_HOUR) {
final int nextValue = value + 1;
final int max = mIs24HourMode ? 23 : 12;
if (nextValue <= max) {
return makeId(type, nextValue);
}
} else if (type == TYPE_MINUTE) {
final int current = getCurrentMinute();
final int snapValue = value - (value % MINUTE_INCREMENT);
final int nextValue = snapValue + MINUTE_INCREMENT;
if (value < current && nextValue > current) {
// The current value is between two snap values.
return makeId(type, current);
} else if (nextValue < MINUTES_IN_CIRCLE) {
return makeId(type, nextValue);
}
}
return INVALID_ID;
}
@Override
protected boolean onPerformActionForVirtualView(int virtualViewId, int action,
Bundle arguments) {
if (action == AccessibilityNodeInfo.ACTION_CLICK) {
final int type = getTypeFromId(virtualViewId);
final int value = getValueFromId(virtualViewId);
if (type == TYPE_HOUR) {
final int hour = mIs24HourMode ? value : hour12To24(value, mAmOrPm);
setCurrentHour(hour);
return true;
} else if (type == TYPE_MINUTE) {
setCurrentMinute(value);
return true;
}
}
return false;
}
private int hour12To24(int hour12, int amOrPm) {
int hour24 = hour12;
if (hour12 == 12) {
if (amOrPm == AM) {
hour24 = 0;
}
} else if (amOrPm == PM) {
hour24 += 12;
}
return hour24;
}
private int hour24To12(int hour24) {
if (hour24 == 0) {
return 12;
} else if (hour24 > 12) {
return hour24 - 12;
} else {
return hour24;
}
}
private void getBoundsForVirtualView(int virtualViewId, Rect bounds) {
final float radius;
final int type = getTypeFromId(virtualViewId);
final int value = getValueFromId(virtualViewId);
final float centerRadius;
final float degrees;
if (type == TYPE_HOUR) {
final boolean innerCircle = getInnerCircleForHour(value);
if (innerCircle) {
centerRadius = mCircleRadius - mTextInset[HOURS_INNER];
radius = mSelectorRadius;
} else {
centerRadius = mCircleRadius - mTextInset[HOURS];
radius = mSelectorRadius;
}
degrees = getDegreesForHour(value);
} else if (type == TYPE_MINUTE) {
centerRadius = mCircleRadius - mTextInset[MINUTES];
degrees = getDegreesForMinute(value);
radius = mSelectorRadius;
} else {
// This should never happen.
centerRadius = 0;
degrees = 0;
radius = 0;
}
final double radians = Math.toRadians(degrees);
final float xCenter = mXCenter + centerRadius * (float) Math.sin(radians);
final float yCenter = mYCenter - centerRadius * (float) Math.cos(radians);
bounds.set((int) (xCenter - radius), (int) (yCenter - radius),
(int) (xCenter + radius), (int) (yCenter + radius));
}
private CharSequence getVirtualViewDescription(int type, int value) {
final CharSequence description;
if (type == TYPE_HOUR || type == TYPE_MINUTE) {
description = Integer.toString(value);
} else {
description = null;
}
return description;
}
private boolean isVirtualViewSelected(int type, int value) {
final boolean selected;
if (type == TYPE_HOUR) {
selected = getCurrentHour() == value;
} else if (type == TYPE_MINUTE) {
selected = getCurrentMinute() == value;
} else {
selected = false;
}
return selected;
}
private int makeId(int type, int value) {
return type << SHIFT_TYPE | value << SHIFT_VALUE;
}
private int getTypeFromId(int id) {
return id >>> SHIFT_TYPE & MASK_TYPE;
}
private int getValueFromId(int id) {
return id >>> SHIFT_VALUE & MASK_VALUE;
}
}
private static class IntHolder {
private int mValue;
public IntHolder(int value) {
mValue = value;
}
public void setValue(int value) {
mValue = value;
}
public int getValue() {
return mValue;
}
}
}