56 lines
1.9 KiB
Java
56 lines
1.9 KiB
Java
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.graphics;
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public class RegionIterator {
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/**
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* Construct an iterator for all of the rectangles in a region. This
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* effectively makes a private copy of the region, so any subsequent edits
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* to region will not affect the iterator.
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*
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* @param region the region that will be iterated
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*/
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public RegionIterator(Region region) {
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mNativeIter = nativeConstructor(region.ni());
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}
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/**
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* Return the next rectangle in the region. If there are no more rectangles
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* this returns false and r is unchanged. If there is at least one more,
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* this returns true and r is set to that rectangle.
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*/
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public final boolean next(Rect r) {
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if (r == null) {
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throw new NullPointerException("The Rect must be provided");
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}
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return nativeNext(mNativeIter, r);
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}
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protected void finalize() throws Throwable {
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nativeDestructor(mNativeIter);
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mNativeIter = 0; // Other finalizers can still call us.
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}
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private static native long nativeConstructor(long native_region);
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private static native void nativeDestructor(long native_iter);
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private static native boolean nativeNext(long native_iter, Rect r);
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private long mNativeIter;
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}
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