SimpleDragListener

package com.ogurecapps.listeners;

import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.actions.Actions;
import com.badlogic.gdx.scenes.scene2d.utils.DragListener;

/**
 * Created by coder1cv8 on 28.03.2017.
 */

public class SimpleDragListener extends DragListener {

    public float offsetX;
    public float offsetY;

    @Override
    public void dragStart(InputEvent event, float x, float y, int pointer) {
        final Actor actor = event.getTarget();

        offsetX = event.getStageX() - actor.getX();
        offsetY = event.getStageY() - actor.getY();
    }

    @Override
    public void drag(InputEvent event, float x, float y, int pointer) {
        float setX = event.getStageX() - offsetX;
        float setY = event.getStageY() - offsetY;

        final Actor actor = event.getTarget();

        float borderLeft = 0;
        float borderRight = 1280f - actor.getWidth();
        float borderTop = 840f - actor.getHeight();
        float borderBottom = 120f;

        if (setX < borderLeft) {
            setX = borderLeft;
        } else if (setX > borderRight) {
            setX = borderRight;
        }

        if (setY > borderTop) {
            setY = borderTop;
        } else if (setY < borderBottom) {
            setY = borderBottom;
        }

        actor.setPosition(setX, setY);
    }
}