package wearable.android.zaim.net.views;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import wearable.android.zaim.net.R;
/**
* SeekArc.java
* <p/>
* This is a class that functions much like a SeekBar but
* follows a circle path instead of a straight line.
*
* @author Neil Davies
*/
public class SeekArc extends View {
private static final String TAG = SeekArc.class.getSimpleName();
private static int INVALID_PROGRESS_VALUE = -1;
/**
* The Drawable for the seek arc thumbnail
*/
private Drawable mThumb;
/**
* The Maximum value that this SeekArc can be set to
*/
private int mMax = 100;
/**
* The Current value that the SeekArc is set to
*/
private int mProgress = 0;
/**
* The width of the progress line for this SeekArc
*/
private int mProgressWidth = 4;
/**
* The Width of the background arc for the SeekArc
*/
private int mArcWidth = 2;
/**
* The Angle to start drawing this Arc from
*/
private int mStartAngle = 0;
/**
* The Angle through which to draw the arc (Max is 360)
*/
private int mSweepAngle = 360;
/**
* The rotation of the SeekArc- 0 is twelve o'clock
*/
private int mRotation = 0;
/**
* Give the SeekArc rounded edges
*/
private boolean mRoundedEdges = false;
/**
* Enable touch inside the SeekArc
*/
private boolean mTouchInside = true;
/**
* Will the progress increase clockwise or anti-clockwise
*/
private boolean mClockwise = true;
// Internal variables
private int mArcRadius = 0;
private float mProgressSweep = 0;
private RectF mArcRect = new RectF();
private Paint mArcPaint;
private Paint mProgressPaint;
private int mTranslateX;
private int mTranslateY;
private int mThumbXPos;
private int mThumbYPos;
private double mTouchAngle;
private float mTouchIgnoreRadius;
private OnSeekArcChangeListener mOnSeekArcChangeListener;
public SeekArc(Context context) {
super(context);
init(context, null, 0);
}
public SeekArc(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs, R.attr.seekArcStyle);
}
public SeekArc(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context, attrs, defStyle);
}
private void init(Context context, AttributeSet attrs, int defStyle) {
Log.d(TAG, "Initialising SeekArc");
final Resources res = getResources();
float density = context.getResources().getDisplayMetrics().density;
// Defaults, may need to link this into theme settings
int arcColor = res.getColor(R.color.progress_gray);
int progressColor = res.getColor(android.R.color.holo_blue_light);
int thumbHalfheight = 0;
int thumbHalfWidth = 0;
mThumb = res.getDrawable(R.drawable.seek_arc_control_selector);
// Convert progress width to pixels for current density
mProgressWidth = (int) (mProgressWidth * density);
if (attrs != null) {
// Attribute initialization
final TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.SeekArc, defStyle, 0);
Drawable thumb = a.getDrawable(R.styleable.SeekArc_thumb);
if (thumb != null) {
mThumb = thumb;
}
thumbHalfheight = (int) mThumb.getIntrinsicHeight() / 2;
thumbHalfWidth = (int) mThumb.getIntrinsicWidth() / 2;
mThumb.setBounds(-thumbHalfWidth, -thumbHalfheight, thumbHalfWidth,
thumbHalfheight);
mMax = a.getInteger(R.styleable.SeekArc_max, mMax);
mProgress = a.getInteger(R.styleable.SeekArc_progress, mProgress);
mProgressWidth = (int) a.getDimension(
R.styleable.SeekArc_progressWidth, mProgressWidth);
mArcWidth = (int) a.getDimension(R.styleable.SeekArc_arcWidth,
mArcWidth);
mStartAngle = a.getInt(R.styleable.SeekArc_startAngle, mStartAngle);
mSweepAngle = a.getInt(R.styleable.SeekArc_sweepAngle, mSweepAngle);
mRotation = a.getInt(R.styleable.SeekArc_rotation, mRotation);
mRoundedEdges = a.getBoolean(R.styleable.SeekArc_roundEdges,
mRoundedEdges);
mTouchInside = a.getBoolean(R.styleable.SeekArc_touchInside,
mTouchInside);
mClockwise = a.getBoolean(R.styleable.SeekArc_clockwise,
mClockwise);
arcColor = a.getColor(R.styleable.SeekArc_arcColor, arcColor);
progressColor = a.getColor(R.styleable.SeekArc_progressColor,
progressColor);
a.recycle();
}
mProgress = (mProgress > mMax) ? mMax : mProgress;
mProgress = (mProgress < 0) ? 0 : mProgress;
mSweepAngle = (mSweepAngle > 360) ? 360 : mSweepAngle;
mSweepAngle = (mSweepAngle < 0) ? 0 : mSweepAngle;
mStartAngle = (mStartAngle > 360) ? 0 : mStartAngle;
mStartAngle = (mStartAngle < 0) ? 0 : mStartAngle;
mArcPaint = new Paint();
mArcPaint.setColor(arcColor);
mArcPaint.setAntiAlias(true);
mArcPaint.setStyle(Paint.Style.STROKE);
mArcPaint.setStrokeWidth(mArcWidth);
//mArcPaint.setAlpha(45);
mProgressPaint = new Paint();
mProgressPaint.setColor(progressColor);
mProgressPaint.setAntiAlias(true);
mProgressPaint.setStyle(Paint.Style.STROKE);
mProgressPaint.setStrokeWidth(mProgressWidth);
if (mRoundedEdges) {
mArcPaint.setStrokeCap(Paint.Cap.ROUND);
mProgressPaint.setStrokeCap(Paint.Cap.ROUND);
}
}
@Override
protected void onDraw(Canvas canvas) {
if (!mClockwise) {
canvas.scale(-1, 1, mArcRect.centerX(), mArcRect.centerY());
}
// Draw the arcs
int mAngleOffset = -90;
final int arcStart = mStartAngle + mAngleOffset + mRotation;
final int arcSweep = mSweepAngle;
canvas.drawArc(mArcRect, arcStart, arcSweep, false, mArcPaint);
canvas.drawArc(mArcRect, arcStart, mProgressSweep, false,
mProgressPaint);
// Draw the thumb nail
canvas.translate(mTranslateX - mThumbXPos, mTranslateY - mThumbYPos);
mThumb.draw(canvas);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int height = getDefaultSize(getSuggestedMinimumHeight(),
heightMeasureSpec);
final int width = getDefaultSize(getSuggestedMinimumWidth(),
widthMeasureSpec);
final int min = Math.min(width, height);
float top = 0;
float left = 0;
int arcDiameter = 0;
mTranslateX = (int) (width * 0.5f);
mTranslateY = (int) (height * 0.5f);
arcDiameter = min - getPaddingLeft();
mArcRadius = arcDiameter / 2;
top = height / 2 - (arcDiameter / 2);
left = width / 2 - (arcDiameter / 2);
mArcRect.set(left, top, left + arcDiameter, top + arcDiameter);
int arcStart = (int) mProgressSweep + mStartAngle + mRotation + 90;
mThumbXPos = (int) (mArcRadius * Math.cos(Math.toRadians(arcStart)));
mThumbYPos = (int) (mArcRadius * Math.sin(Math.toRadians(arcStart)));
setTouchInSide(mTouchInside);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
onStartTrackingTouch();
updateOnTouch(event);
break;
case MotionEvent.ACTION_MOVE:
updateOnTouch(event);
break;
case MotionEvent.ACTION_UP:
onStopTrackingTouch();
setPressed(false);
break;
case MotionEvent.ACTION_CANCEL:
onStopTrackingTouch();
setPressed(false);
break;
}
return true;
}
@Override
protected void drawableStateChanged() {
super.drawableStateChanged();
if (mThumb != null && mThumb.isStateful()) {
int[] state = getDrawableState();
mThumb.setState(state);
}
invalidate();
}
private void onStartTrackingTouch() {
if (mOnSeekArcChangeListener != null) {
mOnSeekArcChangeListener.onStartTrackingTouch(this);
}
}
private void onStopTrackingTouch() {
if (mOnSeekArcChangeListener != null) {
mOnSeekArcChangeListener.onStopTrackingTouch(this);
}
}
private void updateOnTouch(MotionEvent event) {
boolean ignoreTouch = ignoreTouch(event.getX(), event.getY());
if (ignoreTouch) {
return;
}
setPressed(true);
mTouchAngle = getTouchDegrees(event.getX(), event.getY());
int progress = getProgressForAngle(mTouchAngle);
onProgressRefresh(progress, true);
}
private boolean ignoreTouch(float xPos, float yPos) {
boolean ignore = false;
float x = xPos - mTranslateX;
float y = yPos - mTranslateY;
float touchRadius = (float) Math.sqrt(((x * x) + (y * y)));
if (touchRadius < mTouchIgnoreRadius) {
ignore = true;
}
return ignore;
}
private double getTouchDegrees(float xPos, float yPos) {
float x = xPos - mTranslateX;
float y = yPos - mTranslateY;
//invert the x-coord if we are rotating anti-clockwise
x = (mClockwise) ? x : -x;
// convert to arc Angle
double angle = Math.toDegrees(Math.atan2(y, x) + (Math.PI / 2)
- Math.toRadians(mRotation));
if (angle < 0) {
angle = 360 + angle;
}
angle -= mStartAngle;
return angle;
}
private int getProgressForAngle(double angle) {
int touchProgress = (int) Math.round(valuePerDegree() * angle);
touchProgress = (touchProgress < 0) ? INVALID_PROGRESS_VALUE
: touchProgress;
touchProgress = (touchProgress > mMax) ? INVALID_PROGRESS_VALUE
: touchProgress;
return touchProgress;
}
private float valuePerDegree() {
return (float) mMax / mSweepAngle;
}
private void onProgressRefresh(int progress, boolean fromUser) {
updateProgress(progress, fromUser);
}
private void updateThumbPosition() {
int thumbAngle = (int) (mStartAngle + mProgressSweep + mRotation + 90);
mThumbXPos = (int) (mArcRadius * Math.cos(Math.toRadians(thumbAngle)));
mThumbYPos = (int) (mArcRadius * Math.sin(Math.toRadians(thumbAngle)));
}
private void updateProgress(int progress, boolean fromUser) {
if (progress == INVALID_PROGRESS_VALUE) {
return;
}
if (mOnSeekArcChangeListener != null) {
mOnSeekArcChangeListener
.onProgressChanged(this, progress, fromUser);
}
progress = (progress > mMax) ? mMax : progress;
progress = (mProgress < 0) ? 0 : progress;
mProgress = progress;
mProgressSweep = (float) progress / mMax * mSweepAngle;
updateThumbPosition();
invalidate();
}
/**
* Sets a listener to receive notifications of changes to the SeekArc's
* progress level. Also provides notifications of when the user starts and
* stops a touch gesture within the SeekArc.
*
* @param l The seek bar notification listener
* @see android.widget.SeekBar.OnSeekBarChangeListener
*/
public void setOnSeekArcChangeListener(OnSeekArcChangeListener l) {
mOnSeekArcChangeListener = l;
}
public void setProgress(int progress) {
updateProgress(progress, false);
}
public int getProgressWidth() {
return mProgressWidth;
}
public void setProgressWidth(int mProgressWidth) {
this.mProgressWidth = mProgressWidth;
mProgressPaint.setStrokeWidth(mProgressWidth);
}
public int getArcWidth() {
return mArcWidth;
}
public void setArcWidth(int mArcWidth) {
this.mArcWidth = mArcWidth;
mArcPaint.setStrokeWidth(mArcWidth);
}
public int getArcRotation() {
return mRotation;
}
public void setArcRotation(int mRotation) {
this.mRotation = mRotation;
updateThumbPosition();
}
public int getStartAngle() {
return mStartAngle;
}
public void setStartAngle(int mStartAngle) {
this.mStartAngle = mStartAngle;
updateThumbPosition();
}
public int getSweepAngle() {
return mSweepAngle;
}
public void setSweepAngle(int mSweepAngle) {
this.mSweepAngle = mSweepAngle;
updateThumbPosition();
}
public void setRoundedEdges(boolean isEnabled) {
mRoundedEdges = isEnabled;
if (mRoundedEdges) {
mArcPaint.setStrokeCap(Paint.Cap.ROUND);
mProgressPaint.setStrokeCap(Paint.Cap.ROUND);
} else {
mArcPaint.setStrokeCap(Paint.Cap.SQUARE);
mProgressPaint.setStrokeCap(Paint.Cap.SQUARE);
}
}
public void setTouchInSide(boolean isEnabled) {
int thumbHalfheight = (int) mThumb.getIntrinsicHeight() / 2;
int thumbHalfWidth = (int) mThumb.getIntrinsicWidth() / 2;
mTouchInside = isEnabled;
if (mTouchInside) {
mTouchIgnoreRadius = (float) mArcRadius / 4;
} else {
// Don't use the exact radius makes interaction too tricky
mTouchIgnoreRadius = mArcRadius
- Math.min(thumbHalfWidth, thumbHalfheight);
}
}
public void setClockwise(boolean isClockwise) {
mClockwise = isClockwise;
}
public interface OnSeekArcChangeListener {
/**
* Notification that the progress level has changed. Clients can use the
* fromUser parameter to distinguish user-initiated changes from those
* that occurred programmatically.
*
* @param seekArc The SeekArc whose progress has changed
* @param progress The current progress level.
* @param fromUser True if the progress change was initiated by the user.
*/
void onProgressChanged(SeekArc seekArc, int progress, boolean fromUser);
/**
* Notification that the user has started a touch gesture. Clients may
* want to use this to disable advancing the seekbar.
*
* @param seekArc The SeekArc in which the touch gesture began
*/
void onStartTrackingTouch(SeekArc seekArc);
/**
* Notification that the user has finished a touch gesture. Clients may
* want to use this to re-enable advancing the seekarc.
*
* @param seekArc The SeekArc in which the touch gesture began
*/
void onStopTrackingTouch(SeekArc seekArc);
}
}