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/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.graphics;
public class RegionIterator {
/**
* Construct an iterator for all of the rectangles in a region. This
* effectively makes a private copy of the region, so any subsequent edits
* to region will not affect the iterator.
*
* @param region the region that will be iterated
*/
public RegionIterator(Region region) {
mNativeIter = nativeConstructor(region.ni());
}
/**
* Return the next rectangle in the region. If there are no more rectangles
* this returns false and r is unchanged. If there is at least one more,
* this returns true and r is set to that rectangle.
*/
public final boolean next(Rect r) {
if (r == null) {
throw new NullPointerException("The Rect must be provided");
}
return nativeNext(mNativeIter, r);
}
protected void finalize() throws Throwable {
nativeDestructor(mNativeIter);
}
private static native long nativeConstructor(long native_region);
private static native void nativeDestructor(long native_iter);
private static native boolean nativeNext(long native_iter, Rect r);
private final long mNativeIter;
}
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