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package draganddrop;

import javafx.scene.*;
import javafx.scene.input.*;

public class DragBehavior {
    public var target: Node;
    public var targetWidth: Number;
    public var targetHeight: Number;
    public var maxX = 200.0;
    public var maxY = 200.0;
    var startX = 0.0;
    var startY = 0.0;
    
    init {
        target.onMousePressed = function(e:MouseEvent):Void {
            startX = e.sceneX-target.translateX;
            startY = e.sceneY-target.translateY;
        }
        target.onMouseDragged = function(e:MouseEvent):Void {
            var tx = e.sceneX-startX;
            if(tx < 0) { tx = 0; }
            if(tx > maxX - targetWidth) { tx = maxX - targetWidth; }
            target.translateX = tx;

            var ty = e.sceneY-startY;
            if(ty < 0) { ty = 0; }
            if(ty > maxY - targetHeight) { ty = maxY - targetHeight; }
            target.translateY = ty;
        }
    }
}