Package docking.widgets.tree
Class GTreeState
- java.lang.Object
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- docking.widgets.tree.GTreeState
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public class GTreeState extends java.lang.Object
A class to remember the current state of the tree, for things like expanded paths, selected paths and the view location.This class is used to restore state for uses so that updates to the tree do not cause the user to lose their spot.
Issues:
- If the number of expanded items is too large, then the tree will spend a large amount of time restoring, thus we limit the size of the expanded paths
- If we have to trim the number of items we remember, we need to do so intelligently so that the user experience seems natural (for example, when trimming what to keep, be sure to first keep what is visible to the user, versus expanded/selected items that are scrolled off the top of the view.
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Constructor Summary
Constructors Constructor Description GTreeState(GTree tree)
GTreeState(GTree tree, GTreeNode node)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.util.List<javax.swing.tree.TreePath>
getExpandedPaths()
java.util.List<javax.swing.tree.TreePath>
getSelectedPaths()
javax.swing.tree.TreePath[]
getViewPaths()
Returns the top few paths that are visible in the view.boolean
isEmpty()
java.lang.String
toString()
void
updateStateForMovedNodes()
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Method Detail
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getExpandedPaths
public java.util.List<javax.swing.tree.TreePath> getExpandedPaths()
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getSelectedPaths
public java.util.List<javax.swing.tree.TreePath> getSelectedPaths()
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getViewPaths
public javax.swing.tree.TreePath[] getViewPaths()
Returns the top few paths that are visible in the view.- Returns:
- the top few paths that are visible in the view.
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updateStateForMovedNodes
public void updateStateForMovedNodes()
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isEmpty
public boolean isEmpty()
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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