abstractcelleditor.java

来自「一个结java树和表格的控件」· Java 代码 · 共 62 行

import javax.swing.*;
import javax.swing.event.*;
import java.util.EventObject;

public class AbstractCellEditor implements CellEditor {

	protected EventListenerList listenerList = new EventListenerList();

	public Object getCellEditorValue() {
		return null;
	}

	public boolean isCellEditable(EventObject e) {
		return true;
	}

	public boolean shouldSelectCell(EventObject anEvent) {
		return false;
	}

	public boolean stopCellEditing() {
		return true;
	}

	public void cancelCellEditing() {
	}

	public void addCellEditorListener(CellEditorListener l) {
		listenerList.add(CellEditorListener.class, l);
	}

	public void removeCellEditorListener(CellEditorListener l) {
		listenerList.remove(CellEditorListener.class, l);
	}

	protected void fireEditingStopped() {
		// Guaranteed to return a non-null array
		Object[] listeners = listenerList.getListenerList();
		// Process the listeners last to first, notifying
		// those that are interested in this event
		for (int i = listeners.length - 2; i >= 0; i -= 2) {
			if (listeners[i] == CellEditorListener.class) {
				((CellEditorListener) listeners[i + 1])
						.editingStopped(new ChangeEvent(this));
			}
		}
	}

	protected void fireEditingCanceled() {
		// Guaranteed to return a non-null array
		Object[] listeners = listenerList.getListenerList();
		// Process the listeners last to first, notifying
		// those that are interested in this event
		for (int i = listeners.length - 2; i >= 0; i -= 2) {
			if (listeners[i] == CellEditorListener.class) {
				((CellEditorListener) listeners[i + 1])
						.editingCanceled(new ChangeEvent(this));
			}
		}
	}
}