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Lines 85-90
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| 85 |
*/ |
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*/ |
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private int expandToLevel = 0; |
86 |
private int expandToLevel = 0; |
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private boolean preserveExpansion; |
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| 88 |
/** |
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/** |
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* Safe runnable used to update an item. |
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* Safe runnable used to update an item. |
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*/ |
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*/ |
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Lines 104-109
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| 104 |
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106 |
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| 105 |
} |
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} |
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108 |
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109 |
protected void preservingSelection(Runnable updateCode) { |
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Object[] expandedElements = null; |
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if (preserveExpansion) { |
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expandedElements = getExpandedElements(); |
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} |
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super.preservingSelection(updateCode); |
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if (preserveExpansion) { |
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setExpandedElements(expandedElements); |
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} |
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} |
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| 107 |
/** |
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/** |
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* Creates an abstract tree viewer. The viewer has no input, no content |
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* Creates an abstract tree viewer. The viewer has no input, no content |
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* provider, a default label provider, no sorter, no filters, and has |
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* provider, a default label provider, no sorter, no filters, and has |
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Lines 2436-2441
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| 2436 |
} |
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} |
| 2437 |
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| 2438 |
/** |
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/** |
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* Enable or disable the preserve expansion behavior of this viewer. The |
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* default is that the viewer does not guarantee preserving deep expansion state |
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* across update operations, for performance reasons. Note that this method |
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* has been introduced in 3.5 and that trying to enable expansion state |
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* preserving may not be possible for all subclasses of |
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* <code>AbstractTreeViewer</code>, or may cause program errors. This method |
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* is supported for {@link TreeViewer}, but no promises are made for other |
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* subclasses of AbstractTreeViewer, or subclasses of the listed viewer |
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* classes. |
| 2461 |
* |
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* @param preserve |
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* <code>true</code> if expansion state should be preserved, |
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* <code>false</code> otherwise |
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* @since 3.5 |
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*/ |
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public void setPreserveExpansion(boolean preserve) { |
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this.preserveExpansion = preserve; |
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} |
| 2470 |
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| 2471 |
/** |
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* Returns whether (deep) expansion state should be preserved across |
| 2473 |
* update operations. To be used by subclasses that override |
| 2474 |
* {@link #preservingSelection(Runnable)}. |
| 2475 |
* |
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* @return <code>true</code> if expansion should be preserved, |
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* <code>false</code> otherwise |
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* @since 3.5 |
| 2479 |
*/ |
| 2480 |
protected boolean getPreserveExpansion() { |
| 2481 |
return preserveExpansion; |
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} |
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| 2484 |
/** |
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* Sets the selection to the given list of items. |
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* Sets the selection to the given list of items. |
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* |
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* |
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* @param items |
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* @param items |
