コード例 #1
0
 /**
  * As {@code setCurrent}, but without invalidating a drawable. Subclasses are responsible to call
  * {@code invalidateSelf} on their own.
  *
  * @param newDelegate
  * @return the previous delegate
  */
 protected Drawable setCurrentWithoutInvalidate(Drawable newDelegate) {
   Drawable previousDelegate = mCurrentDelegate;
   DrawableUtils.setCallbacks(previousDelegate, null, null);
   DrawableUtils.setCallbacks(newDelegate, null, null);
   DrawableUtils.setDrawableProperties(newDelegate, mDrawableProperties);
   DrawableUtils.copyProperties(newDelegate, previousDelegate);
   DrawableUtils.setCallbacks(newDelegate, this, this);
   mCurrentDelegate = newDelegate;
   return previousDelegate;
 }
コード例 #2
0
 /**
  * Constructs a new layer drawable.
  *
  * @param layers the layers that this drawable displays
  */
 public ArrayDrawable(Drawable[] layers) {
   Preconditions.checkNotNull(layers);
   mLayers = layers;
   for (int i = 0; i < mLayers.length; i++) {
     DrawableUtils.setCallbacks(mLayers[i], this, this);
   }
   mDrawableParents = new DrawableParent[mLayers.length];
 }
コード例 #3
0
  /** Sets a new drawable at the specified index, and return the previous drawable, if any. */
  @Nullable
  public Drawable setDrawable(int index, @Nullable Drawable drawable) {
    Preconditions.checkArgument(index >= 0);
    Preconditions.checkArgument(index < mLayers.length);
    final Drawable oldDrawable = mLayers[index];
    if (drawable != oldDrawable) {
      if (drawable != null && mIsMutated) {
        drawable.mutate();
      }

      DrawableUtils.setCallbacks(mLayers[index], null, null);
      DrawableUtils.setCallbacks(drawable, null, null);
      DrawableUtils.setDrawableProperties(drawable, mDrawableProperties);
      DrawableUtils.copyProperties(drawable, this);
      DrawableUtils.setCallbacks(drawable, this, this);
      mIsStatefulCalculated = false;
      mLayers[index] = drawable;
      invalidateSelf();
    }
    return oldDrawable;
  }
コード例 #4
0
 /**
  * Constructs a new forwarding drawable.
  *
  * @param drawable drawable that this forwarding drawable will forward to
  */
 public ForwardingDrawable(Drawable drawable) {
   mCurrentDelegate = drawable;
   DrawableUtils.setCallbacks(mCurrentDelegate, this, this);
 }