/**
* Set the progress of the CircularSeekBar. If the progress is the same, then any listener will
* not receive a onProgressChanged event.
*
* @param progress The progress to set the CircularSeekBar to.
*/
public void setProgress(int progress) {
if (mProgress != progress) {
mProgress = progress;
if (mOnCircularSeekBarChangeListener != null) {
mOnCircularSeekBarChangeListener.onProgressChanged(this, progress, false);
}
recalculateAll();
invalidate();
}
}
/**
* Set the max of the CircularSeekBar. If the new max is less than the current progress, then the
* progress will be set to zero. If the progress is changed as a result, then any listener will
* receive a onProgressChanged event.
*
* @param max The new max for the CircularSeekBar.
*/
public void setMax(int max) {
if (!(max <= 0)) { // Check to make sure it's greater than zero
if (max <= mProgress) {
mProgress = 0; // If the new max is less than current progress, set progress to zero
if (mOnCircularSeekBarChangeListener != null) {
mOnCircularSeekBarChangeListener.onProgressChanged(this, mProgress, false);
}
}
mMax = max;
recalculateAll();
invalidate();
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (!isTouchEnabled) {
return false;
}
// Convert coordinates to our internal coordinate system
float x = event.getX() - getWidth() / 2;
float y = event.getY() - getHeight() / 2;
// Get the distance from the center of the circle in terms of x and y
float distanceX = mCircleRectF.centerX() - x;
float distanceY = mCircleRectF.centerY() - y;
// Get the distance from the center of the circle in terms of a radius
float touchEventRadius = (float) Math.sqrt((Math.pow(distanceX, 2) + Math.pow(distanceY, 2)));
float minimumTouchTarget =
MIN_TOUCH_TARGET_DP * DPTOPX_SCALE; // Convert minimum touch target into px
float additionalRadius; // Either uses the minimumTouchTarget size or larger if the ring/pointer
// is larger
if (mCircleStrokeWidth
< minimumTouchTarget) { // If the width is less than the minimumTouchTarget, use the
// minimumTouchTarget
additionalRadius = minimumTouchTarget / 2;
} else {
additionalRadius = mCircleStrokeWidth / 2; // Otherwise use the width
}
float outerRadius =
Math.max(mCircleHeight, mCircleWidth)
+ additionalRadius; // Max outer radius of the circle, including the minimumTouchTarget
// or wheel width
float innerRadius =
Math.min(mCircleHeight, mCircleWidth)
- additionalRadius; // Min inner radius of the circle, including the minimumTouchTarget
// or wheel width
if (mPointerRadius
< (minimumTouchTarget
/ 2)) { // If the pointer radius is less than the minimumTouchTarget, use the
// minimumTouchTarget
additionalRadius = minimumTouchTarget / 2;
} else {
additionalRadius = mPointerRadius; // Otherwise use the radius
}
float touchAngle;
touchAngle = (float) ((Math.atan2(y, x) / Math.PI * 180) % 360); // Verified
touchAngle = (touchAngle < 0 ? 360 + touchAngle : touchAngle); // Verified
cwDistanceFromStart = touchAngle - mStartAngle; // Verified
cwDistanceFromStart =
(cwDistanceFromStart < 0 ? 360f + cwDistanceFromStart : cwDistanceFromStart); // Verified
ccwDistanceFromStart = 360f - cwDistanceFromStart; // Verified
cwDistanceFromEnd = touchAngle - mEndAngle; // Verified
cwDistanceFromEnd =
(cwDistanceFromEnd < 0 ? 360f + cwDistanceFromEnd : cwDistanceFromEnd); // Verified
ccwDistanceFromEnd = 360f - cwDistanceFromEnd; // Verified
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// These are only used for ACTION_DOWN for handling if the pointer was the part that was
// touched
float pointerRadiusDegrees =
(float) ((mPointerRadius * 180) / (Math.PI * Math.max(mCircleHeight, mCircleWidth)));
cwDistanceFromPointer = touchAngle - mPointerPosition;
cwDistanceFromPointer =
(cwDistanceFromPointer < 0 ? 360f + cwDistanceFromPointer : cwDistanceFromPointer);
ccwDistanceFromPointer = 360f - cwDistanceFromPointer;
// This is for if the first touch is on the actual pointer.
if (((touchEventRadius >= innerRadius) && (touchEventRadius <= outerRadius))
&& ((cwDistanceFromPointer <= pointerRadiusDegrees)
|| (ccwDistanceFromPointer <= pointerRadiusDegrees))) {
setProgressBasedOnAngle(mPointerPosition);
lastCWDistanceFromStart = cwDistanceFromStart;
mIsMovingCW = true;
mPointerHaloPaint.setAlpha(mPointerAlphaOnTouch);
mPointerHaloPaint.setColor(mPointerHaloColorOnTouch);
recalculateAll();
invalidate();
if (mOnCircularSeekBarChangeListener != null) {
mOnCircularSeekBarChangeListener.onStartTrackingTouch(this);
}
mUserIsMovingPointer = true;
lockAtEnd = false;
lockAtStart = false;
} else if (cwDistanceFromStart
> mTotalCircleDegrees) { // If the user is touching outside of the start AND end
mUserIsMovingPointer = false;
return false;
} else if ((touchEventRadius >= innerRadius)
&& (touchEventRadius <= outerRadius)) { // If the user is touching near the circle
setProgressBasedOnAngle(touchAngle);
lastCWDistanceFromStart = cwDistanceFromStart;
mIsMovingCW = true;
mPointerHaloPaint.setAlpha(mPointerAlphaOnTouch);
mPointerHaloPaint.setColor(mPointerHaloColorOnTouch);
recalculateAll();
invalidate();
if (mOnCircularSeekBarChangeListener != null) {
mOnCircularSeekBarChangeListener.onStartTrackingTouch(this);
mOnCircularSeekBarChangeListener.onProgressChanged(this, mProgress, true);
}
mUserIsMovingPointer = true;
lockAtEnd = false;
lockAtStart = false;
} else { // If the user is not touching near the circle
mUserIsMovingPointer = false;
return false;
}
break;
case MotionEvent.ACTION_MOVE:
if (mUserIsMovingPointer) {
if (lastCWDistanceFromStart < cwDistanceFromStart) {
if ((cwDistanceFromStart - lastCWDistanceFromStart) > 180f && !mIsMovingCW) {
lockAtStart = true;
lockAtEnd = false;
} else {
mIsMovingCW = true;
}
} else {
if ((lastCWDistanceFromStart - cwDistanceFromStart) > 180f && mIsMovingCW) {
lockAtEnd = true;
lockAtStart = false;
} else {
mIsMovingCW = false;
}
}
if (lockAtStart && mIsMovingCW) {
lockAtStart = false;
}
if (lockAtEnd && !mIsMovingCW) {
lockAtEnd = false;
}
if (lockAtStart && !mIsMovingCW && (ccwDistanceFromStart > 90)) {
lockAtStart = false;
}
if (lockAtEnd && mIsMovingCW && (cwDistanceFromEnd > 90)) {
lockAtEnd = false;
}
// Fix for passing the end of a semi-circle quickly
if (!lockAtEnd
&& cwDistanceFromStart > mTotalCircleDegrees
&& mIsMovingCW
&& lastCWDistanceFromStart < mTotalCircleDegrees) {
lockAtEnd = true;
}
if (lockAtStart && lockEnabled) {
// TODO: Add a check if mProgress is already 0, in which case don't call the listener
mProgress = 0;
recalculateAll();
invalidate();
if (mOnCircularSeekBarChangeListener != null) {
mOnCircularSeekBarChangeListener.onProgressChanged(this, mProgress, true);
}
} else if (lockAtEnd && lockEnabled) {
mProgress = mMax;
recalculateAll();
invalidate();
if (mOnCircularSeekBarChangeListener != null) {
mOnCircularSeekBarChangeListener.onProgressChanged(this, mProgress, true);
}
} else if ((mMoveOutsideCircle) || (touchEventRadius <= outerRadius)) {
if (!(cwDistanceFromStart > mTotalCircleDegrees)) {
setProgressBasedOnAngle(touchAngle);
}
recalculateAll();
invalidate();
if (mOnCircularSeekBarChangeListener != null) {
mOnCircularSeekBarChangeListener.onProgressChanged(this, mProgress, true);
}
} else {
break;
}
lastCWDistanceFromStart = cwDistanceFromStart;
} else {
return false;
}
break;
case MotionEvent.ACTION_UP:
mPointerHaloPaint.setAlpha(mPointerAlpha);
mPointerHaloPaint.setColor(mPointerHaloColor);
if (mUserIsMovingPointer) {
mUserIsMovingPointer = false;
invalidate();
if (mOnCircularSeekBarChangeListener != null) {
mOnCircularSeekBarChangeListener.onStopTrackingTouch(this);
}
} else {
return false;
}
break;
case MotionEvent
.ACTION_CANCEL: // Used when the parent view intercepts touches for things like scrolling
mPointerHaloPaint.setAlpha(mPointerAlpha);
mPointerHaloPaint.setColor(mPointerHaloColor);
mUserIsMovingPointer = false;
invalidate();
break;
}
if (event.getAction() == MotionEvent.ACTION_MOVE && getParent() != null) {
getParent().requestDisallowInterceptTouchEvent(true);
}
return true;
}