/*
VARNA is a tool for the automated drawing, visualization and annotation of the secondary structure of RNA, designed as a companion software for web servers and databases.
Copyright (C) 2008 Kevin Darty, Alain Denise and Yann Ponty.
electronic mail : Yann.Ponty@lri.fr
paper mail : LRI, bat 490 Université Paris-Sud 91405 Orsay Cedex France
This file is part of VARNA version 3.1.
VARNA version 3.1 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.
VARNA version 3.1 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 VARNA version 3.1.
If not, see http://www.gnu.org/licenses.
*/
package fr.orsay.lri.varna.controlers;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import fr.orsay.lri.varna.VARNAPanel;
/**
* Controller of the mouse for scroll wheel click and dragged events
*
* @author darty
*
*/
public class ControleurDraggedMolette implements MouseListener,
MouseMotionListener {
private VARNAPanel _vp;
/**
* true
if the right button is pressed
* false
if not
*/
private static Boolean _rightButtonClick;
/**
* The vector which contains the direction of the mouse movement
*/
private static Point _direction;
/**
* The position of the cursor before the mouse drag
*/
private static Point _avant;
/**
* The position of the cursor after the mouse drag
*/
private static Point _apres;
public ControleurDraggedMolette(VARNAPanel vp) {
_vp = vp;
_rightButtonClick = false;
_avant = _apres = _direction = new Point();
}
public void mouseDragged(MouseEvent e) {
// si le bon boutton a été pressé
if (_rightButtonClick) {
_apres = e.getPoint();
_direction = new Point(_apres.x - _avant.x, _apres.y - _avant.y);
_vp.setTranslation(new Point(_vp.getTranslation().x + _direction.x,
_vp.getTranslation().y + _direction.y));
_avant = _apres;
_vp.checkTranslation();
_vp.repaint();
}
}
public void mouseMoved(MouseEvent e) {
}
public void mouseClicked(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
// lors du clic, la position du curseur est enregistrée
_avant = e.getPoint();
// si le boutton molette est pressé ou si le boutton gauche et shift
// sont pressés
if (e.getButton() == MouseEvent.BUTTON2)
{
_rightButtonClick = true;
}
else
{
_rightButtonClick = false;
}
}
public void mouseReleased(MouseEvent e) {
// si le boutton molette est relaché ou si le boutton gauche et shift
// sont relachés
if (e.getButton() == MouseEvent.BUTTON2)
_rightButtonClick = false;
}
}