private void setAction(Action action, boolean animate, int rotation) {
if (action == null) {
return;
}
this.rotation = rotation;
if (currentAction == null) {
currentAction = action;
currentAction.flipHorizontally();
animationProgress = 1f;
UiHelper.postInvalidateOnAnimation(this);
return;
}
if (currentAction.getClass().equals(action.getClass())) {
return;
}
oldAction = currentAction;
currentAction = action;
if (animate) {
animationProgress = 0f;
if (ready) {
startAnimation();
} else {
animateWhenReady = true;
}
} else {
animationProgress = 1f;
UiHelper.postInvalidateOnAnimation(this);
}
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (currentAction == null) {
return;
}
if (oldAction == null) {
updatePath(currentAction);
} else {
final float inverseProgress = 1f - animationProgress;
final float[] current = currentAction.getLineData();
final float[] old = oldAction.getLineData();
final float[] animated = animatedAction.getLineData();
for (int i = 0; i < animated.length; i++) {
animated[i] = current[i] * animationProgress + old[i] * inverseProgress;
}
updatePath(animatedAction);
}
canvas.rotate(
(rotation == ROTATE_CLOCKWISE ? 180f : -180f) * animationProgress, centerX, centerY);
canvas.drawPath(path, paint);
}
private void transformActions() {
if (currentAction != null && !currentAction.isTransformed()) {
currentAction.transform(padding, padding, scale, size);
}
if (oldAction != null && !oldAction.isTransformed()) {
oldAction.transform(padding, padding, scale, size);
}
}
private void startAnimation() {
oldAction.flipHorizontally();
currentAction.flipHorizontally();
transformActions();
animatedAction.setLineSegments(currentAction.getLineSegments());
final ObjectAnimator animator =
ObjectAnimator.ofFloat(ActionView.this, "animationProgress", 0f, 1f);
animator.setInterpolator(BakedBezierInterpolator.getInstance());
animator.setDuration(animationDuration).start();
}
private void updatePath(Action action) {
path.reset();
final float[] data = action.getLineData();
// Once we're near the end of the animation we use the action segments to draw linked lines
if (animationProgress > 0.95f && !action.getLineSegments().isEmpty()) {
for (LineSegment s : action.getLineSegments()) {
path.moveTo(data[s.getStartIdx() + 0], data[s.getStartIdx() + 1]);
path.lineTo(data[s.getStartIdx() + 2], data[s.getStartIdx() + 3]);
for (int i = 1; i < s.indexes.length; i++) {
path.lineTo(data[s.indexes[i] + 0], data[s.indexes[i] + 1]);
path.lineTo(data[s.indexes[i] + 2], data[s.indexes[i] + 3]);
}
}
} else {
for (int i = 0; i < data.length; i += 4) {
path.moveTo(data[i + 0], data[i + 1]);
path.lineTo(data[i + 2], data[i + 3]);
}
}
}