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https://issues.apache.org/jira/browse/NETBEANS-4857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17203824#comment-17203824
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Michael Küttner commented on NETBEANS-4857:
-------------------------------------------
The source of the events is the method synchronizeSelectedNodes(..):
!synchronize-selected-nodes.png!
>From my point of view the whole synchronization process does not need to fire
>any property change event.
Is there way to deactivate or change this behaviour?
> ExplorerManager creates way too many PropertyChangeEvents if multiple
> OutlineViews are synchonized
> ---------------------------------------------------------------------------------------------------
>
> Key: NETBEANS-4857
> URL: https://issues.apache.org/jira/browse/NETBEANS-4857
> Project: NetBeans
> Issue Type: Bug
> Components: platform - Outline&TreeTable
> Affects Versions: 8.2, 11.0, 12.0, 11.1, 11.2, 11.3, 12.1
> Reporter: Michael Küttner
> Priority: Major
> Attachments: TreeViewMain.java, synchronize-selected-nodes.png
>
>
> An ExplorerManager can be shared by multiple OutlineViews to synchronize
> displayed nodes and selection. This works fine for single node selection
> (ListSelectionModel.SINGLE_SELECTION).
> But in case of multiple selection
> (ListSelectionModel.MULTIPLE_INTERVAL_SELECTION) the ExplorerManager creates
> way too many PropertyChangeEvents.
> I attached a small example application that contains two OutlineViews sharing
> a single ExplorerManger. A PropertyChangeListener is registered to the
> ExplorerManager and prints old/new selected node to standard out.
> If you select all nodes from "0" to "29" (e.g, usind SHIFT+Mouse1) you will
> get following output. The PropertyChangeListener is called *32* times!!!
> old node: [0]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
> 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29]; new node: []
> old node: []; new node: [0]
> old node: [0]; new node: [0, 1]
> old node: [0, 1]; new node: [0, 1, 2]
> old node: [0, 1, 2]; new node: [0, 1, 2, 3]
> old node: [0, 1, 2, 3]; new node: [0, 1, 2, 3, 4]
> old node: [0, 1, 2, 3, 4]; new node: [0, 1, 2, 3, 4, 5]
> old node: [0, 1, 2, 3, 4, 5]; new node: [0, 1, 2, 3, 4, 5, 6]
> old node: [0, 1, 2, 3, 4, 5, 6]; new node: [0, 1, 2, 3, 4, 5, 6, 7]
> old node: [0, 1, 2, 3, 4, 5, 6, 7]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8,
> 9]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]; new node: [0, 1, 2, 3, 4, 5, 6, 7,
> 8, 9, 10]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; new node: [0, 1, 2, 3, 4, 5, 6,
> 7, 8, 9, 10, 11]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]; new node: [0, 1, 2, 3, 4,
> 5, 6, 7, 8, 9, 10, 11, 12]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]; new node: [0, 1, 2, 3,
> 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]; new node: [0, 1, 2,
> 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]; new node: [0,
> 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]; new node:
> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]; new
> node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17]; new
> node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18];
> new node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
> 18, 19, 20]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19, 20]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
> 17, 18, 19, 20, 21]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19, 20, 21]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
> 16, 17, 18, 19, 20, 21, 22]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19, 20, 21, 22]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
> 15, 16, 17, 18, 19, 20, 21, 22, 23]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19, 20, 21, 22, 23]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
> 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19, 20, 21, 22, 23, 24]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
> 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19, 20, 21, 22, 23, 24, 25]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
> 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19, 20, 21, 22, 23, 24, 25, 26]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
> 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19, 20, 21, 22, 23, 24, 25, 26, 27]; new node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
> 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28]
> old node: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
> 19, 20, 21, 22, 23, 24, 25, 26, 27, 28]; new node: [0, 1, 2, 3, 4, 5, 6, 7,
> 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
> 28, 29]
>
>
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