Groovy example source code file (ClosureCellEditor.groovy)

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Java - Groovy tags/keywords

abstractcelleditor, awt, closure, closure, closurecelleditor, component, component, defaultcelleditor, jtable, jtree, map, object, object, override, override, swing, table, tablecelleditor, tree, treecelleditor

The Groovy ClosureCellEditor.groovy source code

/*
 * Copyright 2003-2007 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package groovy.swing.impl

import java.awt.Component
import javax.swing.table.TableCellEditor
import javax.swing.tree.TreeCellEditor
import javax.swing.*

/**
 * @author Alexander Klein
 */
class ClosureCellEditor extends AbstractCellEditor implements TableCellEditor, TreeCellEditor {
	Map<String, Closure> callbacks = [:]
	Closure prepareEditor
	Closure editorValue
	List children = []
	boolean defaultEditor
	
	JTable table
	JTree tree
	Object value
	boolean selected
	boolean expanded
	boolean leaf
	int row
	int column
	
	ClosureCellEditor(Closure c = null, Map<String, Closure> callbacks = [:]) {
		this.editorValue = c
		this.callbacks.putAll(callbacks)
	}
	
	@Override
	public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
		this.table = table
		this.tree = null
		this.value = value
		this.selected = isSelected
		this.expanded = false
		this.leaf = false
		this.row = row
		this.column = column
		
		return prepare();
	}
	
	Component getTreeCellEditorComponent(JTree tree, Object value, boolean isSelected, boolean expanded, boolean leaf, int row) {
		this.table = null
		this.tree = tree
		this.value = value
		this.selected = isSelected
		this.expanded = expanded
		this.leaf = leaf
		this.row = row
		this.column = -1
		
		return prepare();
	}
	
	private Component prepare() {
		if (children.isEmpty() || defaultEditor) {
			defaultEditor = true
			children.clear()
			if (table) {
				TableCellEditor tce = table.getDefaultEditor(table.getColumnClass(column))
				children.add(tce.getTableCellEditorComponent(table, value, selected, row, column))
			} else if (tree) {
				TreeCellEditor tce = new DefaultCellEditor(new JTextField())
				children.add(tce.getTreeCellEditorComponent(tree, value, selected, expanded, leaf, row))
			}
		}
		Object o = prepareEditor.call()
		if (o instanceof Component) {
			return (Component) o
		} else {
			return (Component) children[0]
		}
	}
	
	@Override
	public Object getCellEditorValue() {
		editorValue.call()
	}
	
	public void setEditorValue(Closure editorValue) {
		if (editorValue != null) {
			editorValue.delegate = this
			editorValue.resolveStrategy = Closure.DELEGATE_FIRST
		}
		this.editorValue = editorValue
	}
	
	public void setPrepareEditor(Closure prepareEditor) {
		if (prepareEditor != null) {
			prepareEditor.delegate = this
			prepareEditor.resolveStrategy = Closure.DELEGATE_FIRST
		}
		this.prepareEditor = prepareEditor
	}
	
	@Override
	public Object invokeMethod(String name, Object args) {
		def calledMethod = ClosureCellEditor.metaClass.getMetaMethod(name, args)
		if (callbacks."$name" && callbacks."$name" instanceof Closure)
			return callbacks."$name".call(calledMethod, this, args)
		else
			return calledMethod?.invoke(this, args)
	}
}