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package com.sun.javafx.runtime.sequence; |
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import com.sun.javafx.runtime.location.*; |
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11 | 180 | class BoundSequenceElement<T> extends ObjectVariable<T> implements ObjectLocation<T> { |
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private final SequenceLocation<T> seq; |
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private final IntLocation index; |
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private int lastIndex; |
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public BoundSequenceElement(SequenceLocation<T> seq, IntLocation index) { |
17 | 10 | super(); |
18 | 10 | this.seq = seq; |
19 | 10 | this.index = index; |
20 | 10 | lastIndex = index.get(); |
21 | 10 | bind(false, new ObjectBindingExpression<T>() { |
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public T computeValue() { |
23 | 34 | lastIndex = BoundSequenceElement.this.index.get(); |
24 | 34 | return BoundSequenceElement.this.seq.getAsSequence().get(lastIndex); |
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} |
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}, index); |
27 | 10 | seq.addChangeListener(new MySequenceListener()); |
28 | 10 | } |
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30 | 20 | private class MySequenceListener implements SequenceChangeListener<T> { |
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public void onChange(int startPos, int endPos, Sequence<? extends T> newElements, Sequence<T> oldValue, Sequence<T> newValue) { |
32 | 39 | int deltaSize = (endPos-startPos+1) - Sequences.size(newElements); |
33 | 39 | if (deltaSize != 0) { |
34 | 31 | if (startPos <= lastIndex) |
35 | 17 | invalidate(); |
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} |
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else { |
38 | 8 | if (startPos <= lastIndex && lastIndex <= endPos) |
39 | 5 | invalidate(); |
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} |
41 | 39 | } |
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} |
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} |