Expose api on View to determine if the view can be scrolled. (6915944f) · Commits · e / os / android_frameworks_base

api/current.txt

+2 −0

Original line number	Diff line number	Diff line
		@@ -21608,6 +21608,8 @@ package android.view {
		method public void buildDrawingCache();
		method public void buildDrawingCache(boolean);
		method public void buildLayer();
		method public boolean canScrollHorizontally(int);
		method public boolean canScrollVertically(int);
		method public void cancelLongPress();
		method public boolean checkInputConnectionProxy(android.view.View);
		method public void clearAnimation();

+34 −0

Original line number	Diff line number	Diff line
		@@ -8450,6 +8450,40 @@ public class View implements Drawable.Callback2, KeyEvent.Callback, Accessibilit
		return getHeight();
		}

		/**
		* Check if this view can be scrolled horizontally in a certain direction.
		*
		* @param direction Negative to check scrolling left, positive to check scrolling right.
		* @return true if this view can be scrolled in the specified direction, false otherwise.
		*/
		public boolean canScrollHorizontally(int direction) {
		final int offset = computeHorizontalScrollOffset();
		final int range = computeHorizontalScrollRange() - computeHorizontalScrollExtent();
		if (range == 0) return false;
		if (direction < 0) {
		return offset > 0;
		} else {
		return offset < range - 1;
		}
		}

		/**
		* Check if this view can be scrolled vertically in a certain direction.
		*
		* @param direction Negative to check scrolling up, positive to check scrolling down.
		* @return true if this view can be scrolled in the specified direction, false otherwise.
		*/
		public boolean canScrollVertically(int direction) {
		final int offset = computeVerticalScrollOffset();
		final int range = computeVerticalScrollRange() - computeVerticalScrollExtent();
		if (range == 0) return false;
		if (direction < 0) {
		return offset > 0;
		} else {
		return offset < range - 1;
		}
		}

		/**
		* <p>Request the drawing of the horizontal and the vertical scrollbar. The
		* scrollbars are painted only if they have been awakened first.</p>