SeekBarWidget.java 文件源码

/**
 * Applies current thumb tint from {@link Decorator#mTintInfo} to the current thumb drawable.
 * <p>
 * <b>Note</b>, that for post {@link android.os.Build.VERSION_CODES#LOLLIPOP LOLLIPOP} this
 * method does nothing.
 */
@SuppressWarnings("ConstantConditions")
private void applyThumbTint() {
    this.ensureDecorator();
    if (UiConfig.MATERIALIZED || mThumb == null || !mDecorator.hasTintInfo()) {
        return;
    }
    final Drawable thumb = mThumb instanceof ScaleDrawable ? ((ScaleDrawable) mThumb).getDrawable() : mThumb;
    final SeekBarTintInfo tintInfo = mDecorator.getTintInfo();
    if ((!tintInfo.hasTintList && !tintInfo.hasTintMode)) {
        return;
    }
    final boolean isTintDrawable = thumb instanceof TintDrawable;
    final TintDrawable tintDrawable = isTintDrawable ? (TintDrawable) thumb : new TintDrawable(thumb);
    if (tintInfo.hasTintList) {
        tintDrawable.setTintList(tintInfo.tintList);
    }
    if (tintInfo.hasTintMode) {
        tintDrawable.setTintMode(tintInfo.tintMode);
    }
    if (tintDrawable.isStateful()) {
        tintDrawable.setState(getDrawableState());
    }
    if (isTintDrawable) {
        return;
    }
    final int thumbOffset = getThumbOffset();
    this.mThumb = mDecorator.hasPrivateFlag(PFLAG_DISCRETE) ?
            mAnimations.makeThumbScaleable(tintDrawable, Gravity.CENTER) :
            tintDrawable;

    super.setThumb(mThumb);
    tintDrawable.attachCallback();
    setThumbOffset(thumbOffset);
}