/*
* Freeplane - mind map editor
* Copyright (C) 2011 dimitry
*
* This file author is dimitry
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.freeplane.features.text.mindmapmode;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.KeyEventDispatcher;
import java.awt.KeyboardFocusManager;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
/**
* @author Dimitry Polivaev
* Aug 23, 2011
*/
public class EventBuffer implements KeyEventDispatcher, FocusListener {
ArrayList<KeyEvent> events = new ArrayList<KeyEvent>(100);
private Component textComponent;
boolean isActive = false;
private InputEvent firstEvent;
private KeyEvent dispatchedEvent = null;
public boolean isActive() {
return isActive;
}
EventBuffer(){}
public Component getTextComponent() {
return textComponent;
}
public void setTextComponent(Component c) {
if(textComponent != null)
textComponent.removeFocusListener(this);
this.textComponent = c;
if(textComponent != null)
textComponent.addFocusListener(this);
}
public boolean dispatchKeyEvent(final KeyEvent ke) {
if(ke.equals(dispatchedEvent)){
return false;
}
if(textComponent != null){
KeyEvent newEvent = new KeyEvent(textComponent, ke.getID(), ke.getWhen(), ke.getModifiers(), ke.getKeyCode(), ke.getKeyChar(), ke.getKeyLocation());
events.add(newEvent);
}
else {
events.add(ke);
}
// Prevent Freeplane freeze
if(ke.getKeyCode() == KeyEvent.VK_ESCAPE
&& ke.getID() == KeyEvent.KEY_RELEASED){
EventQueue.invokeLater(new Runnable() {
public void run() {
KeyboardFocusManager.getCurrentKeyboardFocusManager().removeKeyEventDispatcher(EventBuffer.this);
}
});
}
ke.consume();
return true;
}
public void focusGained(final FocusEvent e) {
try{
textComponent.removeFocusListener(this);
for (int i = 0; i < events.size(); i++) {
final KeyEvent ke = events.get(i);
if(ke.getComponent().equals(textComponent))
dispatchedEvent = ke;
else{
dispatchedEvent = new KeyEvent(textComponent, ke.getID(), ke.getWhen(), ke.getModifiers(), ke.getKeyCode(), ke.getKeyChar(), ke.getKeyLocation());
}
e.getComponent().dispatchEvent(dispatchedEvent);
dispatchedEvent = null;
}
}
finally{
deactivate();
}
}
public void focusLost(final FocusEvent e) {
}
public void activate() {
if(isActive)
return;
KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(this);
isActive = true;
}
public void deactivate() {
if(! isActive)
return;
KeyboardFocusManager.getCurrentKeyboardFocusManager().removeKeyEventDispatcher(this);
isActive = false;
if(textComponent != null)
textComponent.removeFocusListener(this);
textComponent = null;
events.clear();
firstEvent = null;
dispatchedEvent = null;
}
public void activate(InputEvent e) {
activate();
if(e instanceof KeyEvent)
dispatchKeyEvent((KeyEvent) e);
else if(e instanceof MouseEvent)
setFirstEvent(e);
}
public void setFirstEvent(InputEvent e) {
firstEvent = e;
}
public KeyEvent getFirstEvent(){
if(firstEvent instanceof KeyEvent)
return (KeyEvent) firstEvent;
if(events.size() == 0)
return null;
return events.get(0);
}
public MouseEvent getMouseEvent() {
if(firstEvent instanceof MouseEvent)
return (MouseEvent) firstEvent;
else
return null;
}
}