blob: 0ff636ddd2a2dc07c1b4c24ce6e2bb80c4323415 [file] [log] [blame]
package com.airbnb.lottie;
import android.graphics.Path;
import android.graphics.PointF;
import android.support.annotation.Nullable;
import java.util.List;
class EllipseContent implements PathContent, BaseKeyframeAnimation.AnimationListener {
private static final float ELLIPSE_CONTROL_POINT_PERCENTAGE = 0.55228f;
private final Path path = new Path();
private final LottieDrawable lottieDrawable;
private final BaseKeyframeAnimation<?, PointF> sizeAnimation;
private final BaseKeyframeAnimation<?, PointF> positionAnimation;
@Nullable private TrimPathContent trimPath;
private boolean isPathValid;
EllipseContent(LottieDrawable lottieDrawable, BaseLayer layer, CircleShape circleShape) {
this.lottieDrawable = lottieDrawable;
sizeAnimation = circleShape.getSize().createAnimation();
positionAnimation = circleShape.getPosition().createAnimation();
layer.addAnimation(sizeAnimation);
layer.addAnimation(positionAnimation);
sizeAnimation.addUpdateListener(this);
positionAnimation.addUpdateListener(this);
}
@Override public void onValueChanged() {
invalidate();
}
private void invalidate() {
isPathValid = false;
lottieDrawable.invalidateSelf();
}
@Override public void setContents(List<Content> contentsBefore, List<Content> contentsAfter) {
for (int i = 0; i < contentsBefore.size(); i++) {
Content content = contentsBefore.get(i);
if (content instanceof TrimPathContent) {
trimPath = (TrimPathContent) content;
trimPath.addListener(this);
}
}
}
@Override public Path getPath() {
if (isPathValid) {
return path;
}
path.reset();
PointF size = sizeAnimation.getValue();
float halfWidth = size.x / 2f;
float halfHeight = size.y / 2f;
// TODO: handle bounds
float cpW = halfWidth * ELLIPSE_CONTROL_POINT_PERCENTAGE;
float cpH = halfHeight * ELLIPSE_CONTROL_POINT_PERCENTAGE;
path.reset();
path.moveTo(0, -halfHeight);
path.cubicTo(0 + cpW, -halfHeight, halfWidth, 0 - cpH, halfWidth, 0);
path.cubicTo(halfWidth, 0 + cpH, 0 + cpW, halfHeight, 0, halfHeight);
path.cubicTo(0 - cpW, halfHeight, -halfWidth, 0 + cpH, -halfWidth, 0);
path.cubicTo(-halfWidth, 0 - cpH, 0 - cpW, -halfHeight, 0, -halfHeight);
PointF position = positionAnimation.getValue();
path.offset(position.x, position.y);
path.close();
Utils.applyTrimPathIfNeeded(path, trimPath);
isPathValid = true;
return path;
}
}