TreeNode is a container for the value to represent a node on the TreeView. More...

Collaboration diagram for de.yaacc.upnp.server.configuration.TreeNode:

Classes
enum	LoadState
	Whether the children of a folder were read: unknown, being read, or read (then possibly none). More...

Public Member Functions
	TreeNode (TreeNodeData value, int layoutId)

void	addChild (TreeNode child)

void	addChildren (List< TreeNode > newChildren)
	Adds all children in one go (one array growth, no per-child list work).

TreeNodeData	getValue ()

void	setParent (TreeNode parent)

TreeNode	getParent ()

List< TreeNode >	getChildren ()

int	getLayoutId ()

void	setLevel (int level)

int	getLevel ()

void	setExpanded (boolean expanded)

boolean	isExpanded ()

void	setSelected (boolean selected)

boolean	isSelected ()

int	startLoading ()
	Starts reading the children.

boolean	cancelLoading ()
	Gives up a running load (the user collapsed the node): its result will be ignored.

boolean	finishLoading (int generation, List< TreeNode > loadedChildren)
	Takes over the children a load has read.

boolean	failLoading (int generation)
	A load could not read the folder: it stays unknown, so the next click asks again.

boolean	isLoading ()

boolean	isLoaded ()

boolean	isKnownEmpty ()
	The folder was read and has no children - the only case in which the expand symbol is hidden.

Detailed Description

TreeNode is a container for the value to represent a node on the TreeView.

All methods are for the main thread. A folder's children are read on a worker thread and handed over with finishLoading; the load generation makes a result that arrives after the node was collapsed (or loaded again) harmless.

Member Function Documentation

◆ cancelLoading()

boolean de.yaacc.upnp.server.configuration.TreeNode.cancelLoading ( )

Gives up a running load (the user collapsed the node): its result will be ignored.

Returns: true if a load was running

◆ failLoading()

boolean de.yaacc.upnp.server.configuration.TreeNode.failLoading ( int generation )

A load could not read the folder: it stays unknown, so the next click asks again.

Returns: false if the result was stale

◆ finishLoading()

boolean de.yaacc.upnp.server.configuration.TreeNode.finishLoading	(	int	generation,
		List< TreeNode >	loadedChildren )

Takes over the children a load has read.

Returns: false (and nothing changed) if the load was cancelled, restarted or is already finished

Here is the call graph for this function:

◆ startLoading()

int de.yaacc.upnp.server.configuration.TreeNode.startLoading ( )

Starts reading the children.

Returns: the generation the result has to present to finishLoading / failLoading

The documentation for this class was generated from the following file:

/github/workspace/yaacc/src/main/java/de/yaacc/upnp/server/configuration/TreeNode.java