DraggableFrame.java

package com.atlauncher.ui.frame;

import com.atlauncher.Resources;

import java.awt.event.InputEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.JFrame;

public abstract class DraggableFrame
extends JFrame
implements MouseListener, MouseMotionListener{
    private int dGX;
    private int dGY;

    public DraggableFrame(String title){
        super(title);
        this.setUndecorated(true);
        this.setIconImage(Resources.makeImage("icons/icon"));
        this.addMouseListener(this);
        this.addMouseMotionListener(this);
    }

    @Override
    public void mousePressed(MouseEvent e){
        if(e.getButton() == MouseEvent.BUTTON1){
            this.dGX = e.getX();
            this.dGY = e.getY();
        }
    }

    @Override
    public void mouseDragged(MouseEvent e){
        if((e.getModifiersEx() & InputEvent.BUTTON1_DOWN_MASK) != 0){
            this.setLocation(e.getXOnScreen() - this.dGX, e.getYOnScreen() - this.dGY);
        }
    }

    @Override public void mouseMoved(MouseEvent e){}
    @Override public void mouseReleased(MouseEvent e){}
    @Override public void mouseEntered(MouseEvent e){}
    @Override public void mouseExited(MouseEvent e){}
    @Override public void mouseClicked(MouseEvent e){}
}