The model used by JTree.
JTree and its related classes make extensive use of TreePaths for identifying nodes in the TreeModel. If a TreeModel returns the same object, as compared by equals, at two different indices under the same parent than the resulting TreePath objects will be considered equal as well. Some implementations may assume that if two TreePaths are equal, they identify the same node. If this condition is not met, painting problems and other oddities may result. In other words, if getChild for a given parent returns the same Object (as determined by equals) problems may result, and it is recommended you avoid doing this.
Similarly JTree and its related classes place TreePaths in Maps. As such if a node is requested twice, the return values must be equal (using the equals method) and have the same hashCode.
For further information on tree models, including an example of a custom implementation, see How to Use Trees in The Java Tutorial.
The model used by JTree. JTree and its related classes make extensive use of TreePaths for identifying nodes in the TreeModel. If a TreeModel returns the same object, as compared by equals, at two different indices under the same parent than the resulting TreePath objects will be considered equal as well. Some implementations may assume that if two TreePaths are equal, they identify the same node. If this condition is not met, painting problems and other oddities may result. In other words, if getChild for a given parent returns the same Object (as determined by equals) problems may result, and it is recommended you avoid doing this. Similarly JTree and its related classes place TreePaths in Maps. As such if a node is requested twice, the return values must be equal (using the equals method) and have the same hashCode. For further information on tree models, including an example of a custom implementation, see How to Use Trees in The Java Tutorial.
(add-tree-model-listener this l)
Adds a listener for the TreeModelEvent posted after the tree changes.
l - the listener to add - javax.swing.event.TreeModelListener
Adds a listener for the TreeModelEvent posted after the tree changes. l - the listener to add - `javax.swing.event.TreeModelListener`
(get-child this parent index)
Returns the child of parent at index index in the parent's child array. parent must be a node previously obtained from this data source. This should not return null if index is a valid index for parent (that is index >= 0 && index < getChildCount(parent)).
parent - a node in the tree, obtained from this data source - java.lang.Object
index - int
returns: the child of parent at index index - java.lang.Object
Returns the child of parent at index index in the parent's child array. parent must be a node previously obtained from this data source. This should not return null if index is a valid index for parent (that is index >= 0 && index < getChildCount(parent)). parent - a node in the tree, obtained from this data source - `java.lang.Object` index - `int` returns: the child of parent at index index - `java.lang.Object`
(get-child-count this parent)
Returns the number of children of parent. Returns 0 if the node is a leaf or if it has no children. parent must be a node previously obtained from this data source.
parent - a node in the tree, obtained from this data source - java.lang.Object
returns: the number of children of the node parent - int
Returns the number of children of parent. Returns 0 if the node is a leaf or if it has no children. parent must be a node previously obtained from this data source. parent - a node in the tree, obtained from this data source - `java.lang.Object` returns: the number of children of the node parent - `int`
(get-index-of-child this parent child)
Returns the index of child in parent. If either parent or child is null, returns -1. If either parent or child don't belong to this tree model, returns -1.
parent - a node in the tree, obtained from this data source - java.lang.Object
child - the node we are interested in - java.lang.Object
returns: the index of the child in the parent, or -1 if either
child or parent are null
or don't belong to this tree model - int
Returns the index of child in parent. If either parent or child is null, returns -1. If either parent or child don't belong to this tree model, returns -1. parent - a node in the tree, obtained from this data source - `java.lang.Object` child - the node we are interested in - `java.lang.Object` returns: the index of the child in the parent, or -1 if either child or parent are null or don't belong to this tree model - `int`
(get-root this)
Returns the root of the tree. Returns null only if the tree has no nodes.
returns: the root of the tree - java.lang.Object
Returns the root of the tree. Returns null only if the tree has no nodes. returns: the root of the tree - `java.lang.Object`
(leaf? this node)
Returns true if node is a leaf. It is possible for this method to return false even if node has no children. A directory in a filesystem, for example, may contain no files; the node representing the directory is not a leaf, but it also has no children.
node - a node in the tree, obtained from this data source - java.lang.Object
returns: true if node is a leaf - boolean
Returns true if node is a leaf. It is possible for this method to return false even if node has no children. A directory in a filesystem, for example, may contain no files; the node representing the directory is not a leaf, but it also has no children. node - a node in the tree, obtained from this data source - `java.lang.Object` returns: true if node is a leaf - `boolean`
(remove-tree-model-listener this l)
Removes a listener previously added with addTreeModelListener.
l - the listener to remove - javax.swing.event.TreeModelListener
Removes a listener previously added with addTreeModelListener. l - the listener to remove - `javax.swing.event.TreeModelListener`
(value-for-path-changed this path new-value)
Messaged when the user has altered the value for the item identified by path to newValue. If newValue signifies a truly new value the model should post a treeNodesChanged event.
path - path to the node that the user has altered - javax.swing.tree.TreePath
new-value - the new value from the TreeCellEditor - java.lang.Object
Messaged when the user has altered the value for the item identified by path to newValue. If newValue signifies a truly new value the model should post a treeNodesChanged event. path - path to the node that the user has altered - `javax.swing.tree.TreePath` new-value - the new value from the TreeCellEditor - `java.lang.Object`
cljdoc is a website building & hosting documentation for Clojure/Script libraries
× close