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/*
* This file is part of WebLookAndFeel library.
*
* WebLookAndFeel library is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* WebLookAndFeel library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with WebLookAndFeel library. If not, see .
*/
package com.alee.extended.tree;
import com.alee.laf.WebLookAndFeel;
import com.alee.laf.tree.WebTree;
import com.alee.managers.style.StyleId;
import com.alee.utils.CollectionUtils;
import com.alee.utils.compare.Filter;
import javax.swing.tree.TreeCellEditor;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.awt.*;
import java.util.Comparator;
import java.util.List;
/**
* {@link WebTree} extension class.
* It uses {@link AsyncTreeDataProvider} as data source instead of {@link TreeModel}.
* This tree structure is almost never fully available and always loaded on demand.
*
* This component should never be used with a non-Web UIs as it might cause an unexpected behavior.
* You could still use that component even if WebLaF is not your application LaF as this component will use Web-UI in any case.
*
* @param {@link AsyncUniqueNode} type
* @author Mikle Garin
* @see How to use WebAsyncTree
* @see WebTree
* @see com.alee.laf.tree.WebTreeUI
* @see com.alee.laf.tree.TreePainter
* @see AsyncTreeModel
* @see AsyncTreeDataProvider
*/
public class WebAsyncTree extends WebTree
implements FilterableNodes, SortableNodes, AsyncTreeModelListener
{
/**
* todo 1. Allow adding async tree listener for specific node/nodeId listening
*/
/**
* Component properties.
*/
public static final String ASYNC_LOADING_PROPERTY = "asyncLoading";
/**
* Whether to load children asynchronously or not.
*/
protected boolean asyncLoading = true;
/**
* Tree nodes filter.
*/
protected Filter filter;
/**
* Tree nodes comparator.
*/
protected Comparator comparator;
/**
* Constructs new {@link WebAsyncTree} with sample data.
*/
public WebAsyncTree ()
{
this ( StyleId.auto );
}
/**
* Costructs new {@link WebAsyncTree} with the specified {@link AsyncTreeDataProvider} as data source.
*
* @param dataProvider {@link AsyncTreeDataProvider} implementation
*/
public WebAsyncTree ( final AsyncTreeDataProvider dataProvider )
{
this ( StyleId.auto, dataProvider );
}
/**
* Costructs new {@link WebAsyncTree} with the specified {@link AsyncTreeDataProvider} as data source.
*
* @param dataProvider {@link AsyncTreeDataProvider} implementation
* @param renderer {@link TreeCellRenderer} implementation, default implementation is used if {@code null} is provided
*/
public WebAsyncTree ( final AsyncTreeDataProvider dataProvider, final TreeCellRenderer renderer )
{
this ( StyleId.auto, dataProvider, renderer );
}
/**
* Costructs new {@link WebAsyncTree} with the specified {@link AsyncTreeDataProvider} as data source.
*
* @param dataProvider {@link AsyncTreeDataProvider} implementation
* @param editor {@link TreeCellEditor} implementation, default implementation is used if {@code null} is provided
*/
public WebAsyncTree ( final AsyncTreeDataProvider dataProvider, final TreeCellEditor editor )
{
this ( StyleId.auto, dataProvider, editor );
}
/**
* Costructs new {@link WebAsyncTree} with the specified {@link AsyncTreeDataProvider} as data source.
*
* @param dataProvider {@link AsyncTreeDataProvider} implementation
* @param renderer {@link TreeCellRenderer} implementation, default implementation is used if {@code null} is provided
* @param editor {@link TreeCellEditor} implementation, default implementation is used if {@code null} is provided
*/
public WebAsyncTree ( final AsyncTreeDataProvider dataProvider, final TreeCellRenderer renderer, final TreeCellEditor editor )
{
this ( StyleId.auto, dataProvider, renderer, editor );
}
/**
* Constructs new {@link WebAsyncTree} with sample data.
*
* @param id {@link StyleId}
*/
public WebAsyncTree ( final StyleId id )
{
this ( id, null, null, null );
}
/**
* Costructs new {@link WebAsyncTree} with the specified {@link AsyncTreeDataProvider} as data source.
*
* @param id {@link StyleId}
* @param dataProvider {@link AsyncTreeDataProvider} implementation
*/
public WebAsyncTree ( final StyleId id, final AsyncTreeDataProvider dataProvider )
{
this ( id, dataProvider, null, null );
}
/**
* Costructs new {@link WebAsyncTree} with the specified {@link AsyncTreeDataProvider} as data source.
*
* @param id {@link StyleId}
* @param dataProvider {@link AsyncTreeDataProvider} implementation
* @param renderer {@link TreeCellRenderer} implementation, default implementation is used if {@code null} is provided
*/
public WebAsyncTree ( final StyleId id, final AsyncTreeDataProvider dataProvider,
final TreeCellRenderer renderer )
{
this ( id, dataProvider, renderer, null );
}
/**
* Costructs new {@link WebAsyncTree} with the specified {@link AsyncTreeDataProvider} as data source.
*
* @param id {@link StyleId}
* @param dataProvider {@link AsyncTreeDataProvider} implementation
* @param editor {@link TreeCellEditor} implementation, default implementation is used if {@code null} is provided
*/
public WebAsyncTree ( final StyleId id, final AsyncTreeDataProvider dataProvider,
final TreeCellEditor editor )
{
this ( id, dataProvider, null, editor );
}
/**
* Costructs new {@link WebAsyncTree} with the specified {@link AsyncTreeDataProvider} as data source.
*
* @param id {@link StyleId}
* @param dataProvider {@link AsyncTreeDataProvider} implementation
* @param renderer {@link TreeCellRenderer} implementation, default implementation is used if {@code null} is provided
* @param editor {@link TreeCellEditor} implementation, default implementation is used if {@code null} is provided
*/
public WebAsyncTree ( final StyleId id, final AsyncTreeDataProvider dataProvider,
final TreeCellRenderer renderer, final TreeCellEditor editor )
{
super ( id, new EmptyTreeModel () );
if ( dataProvider != null )
{
setDataProvider ( dataProvider );
}
if ( renderer != null )
{
setCellRenderer ( renderer );
}
if ( editor != null )
{
setEditable ( true );
setCellEditor ( editor );
}
}
@Override
public StyleId getDefaultStyleId ()
{
return StyleId.asynctree;
}
/**
* Returns whether children are loaded asynchronously or not.
*
* @return true if children are loaded asynchronously, false otherwise
*/
public boolean isAsyncLoading ()
{
return asyncLoading;
}
/**
* Sets whether to load children asynchronously or not.
*
* @param asyncLoading whether to load children asynchronously or not
*/
public void setAsyncLoading ( final boolean asyncLoading )
{
// Event Dispatch Thread check
WebLookAndFeel.checkEventDispatchThread ();
// Updating loading mode
final boolean old = this.asyncLoading;
this.asyncLoading = asyncLoading;
// Notifying about property change
firePropertyChange ( ASYNC_LOADING_PROPERTY, old, asyncLoading );
}
@Override
public AsyncTreeModel getModel ()
{
return ( AsyncTreeModel ) super.getModel ();
}
@Override
public void setModel ( final TreeModel newModel )
{
// Event Dispatch Thread check
WebLookAndFeel.checkEventDispatchThread ();
/**
* Simply ignoring any models that are not {@link AsyncTreeModel}-based.
* This is a workaround to avoid default model being set in {@link javax.swing.JTree}.
* This way we can prevent any models from being forced on us and avoid unnecessary events and UI updates.
*/
if ( newModel instanceof AsyncTreeModel )
{
final AsyncTreeModel old = getModel ();
if ( old != null )
{
old.uninstall ( this );
}
final AsyncTreeModel model = ( AsyncTreeModel ) newModel;
model.install ( this );
super.setModel ( newModel );
}
else if ( newModel == null )
{
throw new NullPointerException ( "AsyncTreeModel cannot be null" );
}
}
/**
* Returns {@link AsyncTreeDataProvider} used by this {@link WebAsyncTree}.
*
* @return {@link AsyncTreeDataProvider} used by this {@link WebAsyncTree}
*/
public AsyncTreeDataProvider getDataProvider ()
{
final AsyncTreeModel model = getModel ();
return model != null ? model.getDataProvider () : null;
}
/**
* Sets {@link AsyncTreeDataProvider} used by this {@link WebAsyncTree}.
*
* @param dataProvider new {@link AsyncTreeDataProvider} for this {@link WebAsyncTree}
*/
public void setDataProvider ( final AsyncTreeDataProvider dataProvider )
{
// Event Dispatch Thread check
WebLookAndFeel.checkEventDispatchThread ();
/**
* Initializing new {@link AsyncTreeModel} based on specified {@link AsyncTreeDataProvider}.
* This is necessary as the model will keep {@link AsyncTreeDataProvider} instead of {@link WebAsyncTree}.
*/
if ( dataProvider != null )
{
final AsyncTreeDataProvider oldDataProvider = getDataProvider ();
setModel ( new AsyncTreeModel ( dataProvider ) );
firePropertyChange ( WebLookAndFeel.TREE_DATA_PROVIDER_PROPERTY, oldDataProvider, dataProvider );
}
else
{
throw new NullPointerException ( "AsyncTreeDataProvider cannot be null" );
}
}
@Override
public Filter getFilter ()
{
return filter;
}
@Override
public void setFilter ( final Filter filter )
{
final Filter oldFilter = this.filter;
this.filter = filter;
filter ();
firePropertyChange ( WebLookAndFeel.TREE_FILTER_PROPERTY, oldFilter, filter );
}
@Override
public void clearFilter ()
{
setFilter ( null );
}
@Override
public void filter ()
{
getModel ().filter ();
}
@Override
public void filter ( final N node )
{
getModel ().filter ( node );
}
@Override
public void filter ( final N node, final boolean recursively )
{
getModel ().filter ( node, recursively );
}
@Override
public Comparator getComparator ()
{
return comparator;
}
@Override
public void setComparator ( final Comparator comparator )
{
final Comparator oldComparator = this.comparator;
this.comparator = comparator;
sort ();
firePropertyChange ( WebLookAndFeel.TREE_COMPARATOR_PROPERTY, oldComparator, comparator );
}
@Override
public void clearComparator ()
{
setComparator ( null );
}
@Override
public void sort ()
{
getModel ().sort ();
}
@Override
public void sort ( final N node )
{
getModel ().sort ( node );
}
@Override
public void sort ( final N node, final boolean recursively )
{
getModel ().sort ( node, recursively );
}
/**
* Updates nodes sorting and filtering for all loaded nodes.
*/
public void filterAndSort ()
{
getModel ().filterAndSort ( true );
}
/**
* Updates sorting and filtering for the specified node children.
*
* @param node node to update sorting and filter for
*/
public void filterAndSort ( final N node )
{
getModel ().filterAndSort ( node, false );
}
/**
* Updates sorting and filtering for the specified node children.
*
* @param node node to update sorting and filter for
* @param recursively whether should update the whole children structure recursively or not
*/
public void filterAndSort ( final N node, final boolean recursively )
{
getModel ().filterAndSort ( node, recursively );
}
/**
* Sets maximum threads amount for this asynchronous tree.
* Separate threads are used for children loading, data updates and other actions which should be performed asynchronously.
*
* @param amount new maximum threads amount
*/
public void setMaximumThreadsAmount ( final int amount )
{
AsyncTreeQueue.getInstance ( this ).setMaximumThreadsAmount ( amount );
}
/**
* Sets child nodes for the specified node.
* This method might be used to manually change tree node children without causing any structure corruptions.
* It will also cause node to change its state to loaded and it will not retrieve children from data provider unless reload is called.
*
* @param parent node to process
* @param children new node children
*/
public void setChildNodes ( final N parent, final List children )
{
getModel ().setChildNodes ( parent, children );
}
/**
* Adds child node for the specified node.
* This method might be used to manually change tree node children without causing any structure corruptions.
* Be aware that added node will not be displayed if parent node is not yet loaded, this is a strict restriction for async tree.
*
* @param parent node to process
* @param child new node child
*/
public void addChildNode ( final N parent, final N child )
{
getModel ().addChildNode ( parent, child );
}
/**
* Adds child nodes for the specified node.
* This method might be used to manually change tree node children without causing any structure corruptions.
* Be aware that added nodes will not be displayed if parent node is not yet loaded, this is a strict restriction for async tree.
*
* @param parent node to process
* @param children new node children
*/
public void addChildNodes ( final N parent, final List children )
{
getModel ().addChildNodes ( parent, children );
}
/**
* Inserts a list of child nodes into parent node.
* This method might be used to manually change tree node children without causing any structure corruptions.
* Be aware that added nodes will not be displayed if parent node is not yet loaded, this is a strict restriction for async tree.
*
* @param children list of new child nodes
* @param parent parent node
* @param index insert index
*/
public void insertChildNodes ( final List children, final N parent, final int index )
{
getModel ().insertNodesInto ( children, parent, index );
}
/**
* Inserts an array of child nodes into parent node.
* This method might be used to manually change tree node children without causing any structure corruptions.
* Be aware that added nodes will not be displayed if parent node is not yet loaded, this is a strict restriction for async tree.
*
* @param children array of new child nodes
* @param parent parent node
* @param index insert index
*/
public void insertChildNodes ( final N[] children, final N parent, final int index )
{
getModel ().insertNodesInto ( children, parent, index );
}
/**
* Inserts child node into parent node.
* This method might be used to manually change tree node children without causing any structure corruptions.
*
* @param child new child node
* @param parent parent node
* @param index insert index
*/
public void insertChildNode ( final N child, final N parent, final int index )
{
getModel ().insertNodeInto ( child, parent, index );
}
/**
* Removes node with the specified ID from tree structure.
* This method will have effect only if node exists.
*
* @param nodeId ID of the node to remove
*/
public void removeNode ( final String nodeId )
{
removeNode ( findNode ( nodeId ) );
}
/**
* Removes node from tree structure.
* This method will have effect only if node exists.
*
* @param node node to remove
*/
public void removeNode ( final N node )
{
getModel ().removeNodeFromParent ( node );
}
/**
* Removes nodes from tree structure.
* This method will have effect only if nodes exist.
*
* @param nodes list of nodes to remove
*/
public void removeNodes ( final List nodes )
{
getModel ().removeNodesFromParent ( nodes );
}
/**
* Removes nodes from tree structure.
* This method will have effect only if nodes exist.
*
* @param nodes array of nodes to remove
*/
public void removeNodes ( final N[] nodes )
{
getModel ().removeNodesFromParent ( nodes );
}
/**
* Returns whether children for the specified node are already loaded or not.
*
* @param parent node to process
* @return true if children for the specified node are already loaded, false otherwise
*/
public boolean areChildrenLoaded ( final N parent )
{
return getModel ().areChildrenLoaded ( parent );
}
/**
* Looks for the node with the specified ID in the tree model and returns it or null if it was not found.
*
* @param nodeId node ID
* @return node with the specified ID or null if it was not found
*/
public N findNode ( final String nodeId )
{
return getModel ().findNode ( nodeId );
}
/**
* Forces tree node with the specified ID to be updated.
*
* @param nodeId ID of the tree node to be updated
*/
public void updateNode ( final String nodeId )
{
updateNode ( findNode ( nodeId ) );
}
/**
* Forces tree node structure with the specified ID to be updated.
*
* @param nodeId ID of the tree node to be updated
*/
public void updateNodeStructure ( final String nodeId )
{
updateNodeStructure ( findNode ( nodeId ) );
}
/**
* Forces tree node structure with the specified ID to be updated.
*
* @param node tree node to be updated
*/
public void updateNodeStructure ( final N node )
{
getModel ().updateNodeStructure ( node );
}
/**
* Reloads selected node children.
* Unlike asynchronous methods this one works in EDT and forces to wait until the nodes load finishes.
*/
public void reloadSelectedNodesSync ()
{
final boolean async = isAsyncLoading ();
setAsyncLoading ( false );
reloadSelectedNodes ();
setAsyncLoading ( async );
}
/**
* Reloads selected node children.
*/
public void reloadSelectedNodes ()
{
// Checking that selection is not empty
final TreePath[] paths = getSelectionPaths ();
if ( paths != null )
{
// Reloading all selected nodes
for ( final TreePath path : paths )
{
// Checking if node is not null and not busy yet
final N node = getNodeForPath ( path );
if ( node != null && !node.isLoading () )
{
// Reloading node children
performReload ( node, path, false );
}
}
}
}
/**
* Reloads node under the specified point.
*
* @param point point to look for node
* @return reloaded node or null if none reloaded
*/
public N reloadNodeUnderPoint ( final Point point )
{
return reloadNodeUnderPoint ( point.x, point.y );
}
/**
* Reloads node under the specified point.
*
* @param x point X coordinate
* @param y point Y coordinate
* @return reloaded node or null if none reloaded
*/
public N reloadNodeUnderPoint ( final int x, final int y )
{
return reloadPath ( getPathForLocation ( x, y ) );
}
/**
* Reloads node with the specified ID.
* Unlike asynchronous methods this one works in EDT and forces to wait until the nodes load finishes.
*
* @param nodeId ID of the node to reload
* @return reloaded node or null if none reloaded
*/
public N reloadNodeSync ( final String nodeId )
{
return reloadNodeSync ( findNode ( nodeId ) );
}
/**
* Reloads specified node children.
* Unlike asynchronous methods this one works in EDT and forces to wait until the nodes load finishes.
*
* @param node node to reload
* @return reloaded node or null if none reloaded
*/
public N reloadNodeSync ( final N node )
{
return reloadNodeSync ( node, false );
}
/**
* Reloads specified node children and selects it if requested.
* Unlike asynchronous methods this one works in EDT and forces to wait until the nodes load finishes.
*
* @param node node to reload
* @param select whether select the node or not
* @return reloaded node or null if none reloaded
*/
public N reloadNodeSync ( final N node, final boolean select )
{
final boolean async = isAsyncLoading ();
setAsyncLoading ( false );
reloadNode ( node, select );
setAsyncLoading ( async );
return node;
}
/**
* Reloads root node children.
*
* @return reloaded root node
*/
public N reloadRootNode ()
{
return reloadNode ( getRootNode () );
}
/**
* Reloads node with the specified ID.
*
* @param nodeId ID of the node to reload
* @return reloaded node or null if none reloaded
*/
public N reloadNode ( final String nodeId )
{
return reloadNode ( findNode ( nodeId ) );
}
/**
* Reloads specified node children.
*
* @param node node to reload
* @return reloaded node or null if none reloaded
*/
public N reloadNode ( final N node )
{
return reloadNode ( node, false );
}
/**
* Reloads specified node children and selects it if requested.
*
* @param node node to reload
* @param select whether select the node or not
* @return reloaded node or null if none reloaded
*/
public N reloadNode ( final N node, final boolean select )
{
// Checking that node is not null
if ( node != null && !node.isLoading () )
{
// Reloading node children
performReload ( node, getPathForNode ( node ), select );
return node;
}
return null;
}
/**
* Reloads node children at the specified path.
* Unlike asynchronous methods this one works in EDT and forces to wait until the nodes load finishes.
*
* @param path path of the node to reload
* @return reloaded node or null if none reloaded
*/
public N reloadPathSync ( final TreePath path )
{
return reloadPathSync ( path, false );
}
/**
* Reloads node children at the specified path and selects it if needed.
* Unlike asynchronous methods this one works in EDT and forces to wait until the nodes load finishes.
*
* @param path path of the node to reload
* @param select whether select the node or not
* @return reloaded node or null if none reloaded
*/
public N reloadPathSync ( final TreePath path, final boolean select )
{
final boolean async = isAsyncLoading ();
setAsyncLoading ( false );
final N node = reloadPath ( path, select );
setAsyncLoading ( async );
return node;
}
/**
* Reloads node children at the specified path.
*
* @param path path of the node to reload
* @return reloaded node or null if none reloaded
*/
public N reloadPath ( final TreePath path )
{
return reloadPath ( path, false );
}
/**
* Reloads node children at the specified path and selects it if needed.
*
* @param path path of the node to reload
* @param select whether select the node or not
* @return reloaded node or null if none reloaded
*/
public N reloadPath ( final TreePath path, final boolean select )
{
// Checking that path is not null
if ( path != null )
{
// Checking if node is not null and not busy yet
final N node = getNodeForPath ( path );
if ( node != null && !node.isLoading () )
{
// Reloading node children
performReload ( node, path, select );
return node;
}
}
return null;
}
/**
* Performs the actual reload call.
*
* @param node node to reload
* @param path path to node
* @param select whether select the node or not
*/
protected void performReload ( final N node, final TreePath path, final boolean select )
{
// Select node under the mouse
if ( select && !isPathSelected ( path ) )
{
setSelectionPath ( path );
}
// Expand the selected node since the collapsed node will ignore reload call
// In case the node children were not loaded yet this call will cause it to load children
if ( !isExpanded ( path ) )
{
expandPath ( path );
}
// Reload selected node children
// This won't be called if node was not loaded yet since expand would call load before
if ( node != null && !node.isLoading () )
{
getModel ().reload ( node );
}
}
/**
* Expands node with the specified ID.
*
* @param nodeId ID of the node to expand
*/
public void expandNode ( final String nodeId )
{
expandNode ( findNode ( nodeId ) );
}
/**
* Expands path using the specified node path IDs.
* IDs are used to find real nodes within the expanded roots.
* Be aware that operation might stop even before reaching the end of the path if something unexpected happened.
*
* @param pathNodeIds node path IDs
*/
public void expandPath ( final List pathNodeIds )
{
expandPath ( pathNodeIds, true, true, null );
}
/**
* Expands path using the specified node path IDs.
* IDs are used to find real nodes within the expanded roots.
* Be aware that operation might stop even before reaching the end of the path if something unexpected happened.
*
* @param pathNodeIds node path IDs
* @param listener async path expansion listener
*/
public void expandPath ( final List pathNodeIds, final AsyncPathExpansionListener listener )
{
expandPath ( pathNodeIds, true, true, listener );
}
/**
* Expands path using the specified node path IDs.
* IDs are used to find real nodes within the expanded roots.
* Be aware that operation might stop even before reaching the end of the path if something unexpected happened.
*
* @param pathNodeIds node path IDs
* @param expandLastNode whether should expand last found path node or not
*/
public void expandPath ( final List pathNodeIds, final boolean expandLastNode )
{
expandPath ( pathNodeIds, expandLastNode, true, null );
}
/**
* Expands path using the specified node path IDs.
* IDs are used to find real nodes within the expanded roots.
* Be aware that operation might stop even before reaching the end of the path if something unexpected happened.
*
* @param pathNodeIds node path IDs
* @param expandLastNode whether should expand last found path node or not
* @param listener async path expansion listener
*/
public void expandPath ( final List pathNodeIds, final boolean expandLastNode, final AsyncPathExpansionListener listener )
{
expandPath ( pathNodeIds, expandLastNode, true, listener );
}
/**
* Expands path using the specified node path IDs.
* IDs are used to find real nodes within the expanded roots.
* Be aware that operation might stop even before reaching the end of the path if something unexpected happened.
*
* @param pathNodeIds node path IDs
* @param expandLastNode whether should expand last found path node or not
* @param selectLastNode whether should select last found path node or not
*/
public void expandPath ( final List pathNodeIds, final boolean expandLastNode, final boolean selectLastNode )
{
expandPath ( pathNodeIds, expandLastNode, selectLastNode, null );
}
/**
* Expands path using the specified node path IDs.
* IDs are used to find real nodes within the expanded roots.
* Be aware that operation might stop even before reaching the end of the path if something unexpected happened.
*
* @param pathNodeIds node path IDs
* @param expandLastNode whether should expand last found path node or not
* @param selectLastNode whether should select last found path node or not
* @param listener async path expansion listener
*/
public void expandPath ( final List pathNodeIds, final boolean expandLastNode, final boolean selectLastNode,
final AsyncPathExpansionListener listener )
{
final List ids = CollectionUtils.copy ( pathNodeIds );
for ( int initial = 0; initial < ids.size (); initial++ )
{
final N initialNode = findNode ( ids.get ( initial ) );
if ( initialNode != null )
{
for ( int i = initial; i >= 0; i-- )
{
ids.remove ( i );
}
if ( ids.size () > 0 )
{
expandPathImpl ( initialNode, ids, expandLastNode, selectLastNode, listener );
}
return;
}
}
// Informing listener that path failed to expand
if ( listener != null )
{
listener.pathFailedToExpand ();
}
}
/**
* Performs a single path node expansion.
* Be aware that operation might stop even before reaching the end of the path if something unexpected happened.
*
* @param currentNode last reached node
* @param leftToExpand node path IDs left for expansion
* @param expandLastNode whether should expand last found path node or not
* @param selectLastNode whether should select last found path node or not
* @param listener async path expansion listener
*/
protected void expandPathImpl ( final N currentNode, final List leftToExpand, final boolean expandLastNode,
final boolean selectLastNode, final AsyncPathExpansionListener listener )
{
// There is still more to load
if ( leftToExpand.size () > 0 )
{
if ( currentNode.isLoaded () )
{
// Expanding already loaded node
expandNode ( currentNode );
// Informing listener that one of path nodes was just expanded
if ( listener != null )
{
listener.pathNodeExpanded ( currentNode );
}
// Retrieving next node
final N nextNode = findNode ( leftToExpand.get ( 0 ) );
leftToExpand.remove ( 0 );
// If node exists continue expanding path
if ( nextNode != null )
{
expandPathImpl ( nextNode, leftToExpand, expandLastNode, selectLastNode, listener );
}
else
{
expandPathEndImpl ( currentNode, expandLastNode, selectLastNode );
// Informing listener that path was expanded as much as it was possible
if ( listener != null )
{
listener.pathPartiallyExpanded ( currentNode );
}
}
}
else
{
// Adding node expansion listener
addAsyncTreeListener ( new AsyncTreeAdapter ()
{
@Override
public void loadCompleted ( final AsyncUniqueNode parent, final List children )
{
if ( parent.getId ().equals ( currentNode.getId () ) )
{
removeAsyncTreeListener ( this );
// Informing listener that one of path nodes was just expanded
if ( listener != null )
{
listener.pathNodeExpanded ( currentNode );
}
// Retrieving next node
final N nextNode = findNode ( leftToExpand.get ( 0 ) );
leftToExpand.remove ( 0 );
// If node exists continue expanding path
if ( nextNode != null )
{
expandPathImpl ( nextNode, leftToExpand, expandLastNode, selectLastNode, listener );
}
else
{
expandPathEndImpl ( currentNode, expandLastNode, selectLastNode );
// Informing listener that path was expanded as much as it was possible
if ( listener != null )
{
listener.pathPartiallyExpanded ( currentNode );
}
}
}
}
@Override
public void loadFailed ( final AsyncUniqueNode parent, final Throwable cause )
{
if ( parent.getId ().equals ( currentNode.getId () ) )
{
removeAsyncTreeListener ( this );
expandPathEndImpl ( currentNode, expandLastNode, selectLastNode );
// Informing listener that path was expanded as much as it was possible
if ( listener != null )
{
listener.pathPartiallyExpanded ( currentNode );
}
}
}
} );
expandNode ( currentNode );
}
}
else
{
expandPathEndImpl ( currentNode, expandLastNode, selectLastNode );
// todo Maybe wait till last node expands?
// Informing listener that path was fully expanded
if ( listener != null )
{
listener.pathExpanded ( currentNode );
}
}
}
/**
* Finishes async tree path expansion.
*
* @param lastFoundNode last found path node
* @param expandLastNode whether should expand last found path node or not
* @param selectLastNode whether should select last found path node or not
*/
protected void expandPathEndImpl ( final N lastFoundNode, final boolean expandLastNode, final boolean selectLastNode )
{
if ( selectLastNode )
{
setSelectedNode ( lastFoundNode );
}
if ( expandLastNode )
{
expandNode ( lastFoundNode );
}
}
/**
* Expands all visible tree rows in a single call.
* This method provides similar functionality to {@link WebTree#expandAll()} method and will actually expand all tree elements,
* even those which are not yet loaded from data provider. Make sure you know what you are doing before calling this method.
*/
@Override
public final void expandAll ()
{
if ( isAsyncLoading () )
{
for ( int i = getRowCount () - 1; i >= 0; i-- )
{
final TreePath path = getPathForRow ( i );
if ( !getModel ().isLeaf ( getNodeForPath ( path ) ) )
{
performFullPathExpand ( path );
}
}
}
else
{
super.expandAll ();
}
}
/**
* Expands path right away (if node children were loaded atleast once before or not) or asynchronously.
*
* @param path path to expand
*/
protected void performFullPathExpand ( final TreePath path )
{
if ( hasBeenExpanded ( path ) )
{
performFullSyncPathExpand ( path );
}
else
{
performFullAsyncPathExpand ( path );
}
}
/**
* Expands path right away.
*
* @param path path to expand
*/
protected void performFullSyncPathExpand ( final TreePath path )
{
// Expand path
expandPath ( path );
// Expand sub-paths
final N node = getNodeForPath ( path );
for ( int i = 0; i < node.getChildCount (); i++ )
{
performFullPathExpand ( getPathForNode ( ( N ) node.getChildAt ( i ) ) );
}
}
/**
* Expands path asynchronously.
*
* @param path path to expand
*/
protected void performFullAsyncPathExpand ( final TreePath path )
{
// Add path expand listener first to get notified when this path will be expanded
addAsyncTreeListener ( new AsyncTreeAdapter ()
{
@Override
public void loadCompleted ( final N parent, final List children )
{
if ( parent == getNodeForPath ( path ) )
{
for ( final N child : children )
{
performFullPathExpand ( child.getTreePath () );
}
removeAsyncTreeListener ( this );
}
}
@Override
public void loadFailed ( final N parent, final Throwable cause )
{
if ( parent == getNodeForPath ( path ) )
{
removeAsyncTreeListener ( this );
}
}
} );
// Force path to expand
expandPath ( path );
}
/**
* Returns all available asynchronous tree listeners list.
*
* @return asynchronous tree listeners list
*/
public List getAsyncTreeListeners ()
{
return CollectionUtils.asList ( listenerList.getListeners ( AsyncTreeListener.class ) );
}
/**
* Adds new asynchronous tree listener.
*
* @param listener asynchronous tree listener to add
*/
public void addAsyncTreeListener ( final AsyncTreeListener listener )
{
listenerList.add ( AsyncTreeListener.class, listener );
}
/**
* Removes asynchronous tree listener.
*
* @param listener asynchronous tree listener to remove
*/
public void removeAsyncTreeListener ( final AsyncTreeListener listener )
{
listenerList.remove ( AsyncTreeListener.class, listener );
}
/**
* Invoked when children load operation starts.
*
* @param parent node which children are being loaded
*/
@Override
public void loadStarted ( final N parent )
{
fireChildrenLoadStarted ( parent );
}
/**
* Fires children load start event.
*
* @param parent node which children are being loaded
*/
protected void fireChildrenLoadStarted ( final N parent )
{
for ( final AsyncTreeListener listener : listenerList.getListeners ( AsyncTreeListener.class ) )
{
listener.loadStarted ( parent );
}
}
/**
* Invoked when children load operation finishes.
*
* @param parent node which children were loaded
* @param children loaded child nodes
*/
@Override
public void loadCompleted ( final N parent, final List children )
{
fireChildrenLoadCompleted ( parent, children );
}
/**
* Fires children load complete event.
*
* @param parent node which children were loaded
* @param children loaded child nodes
*/
protected void fireChildrenLoadCompleted ( final N parent, final List children )
{
for ( final AsyncTreeListener listener : listenerList.getListeners ( AsyncTreeListener.class ) )
{
listener.loadCompleted ( parent, children );
}
}
/**
* Invoked when children load operation fails.
*
* @param parent node which children were loaded
* @param cause children load failure cause
*/
@Override
public void loadFailed ( final N parent, final Throwable cause )
{
fireChildrenLoadFailed ( parent, cause );
}
/**
* Fires children load complete event.
*
* @param parent node which children were loaded
* @param cause children load failure cause
*/
protected void fireChildrenLoadFailed ( final N parent, final Throwable cause )
{
for ( final AsyncTreeListener listener : listenerList.getListeners ( AsyncTreeListener.class ) )
{
listener.loadFailed ( parent, cause );
}
}
}
