dojo.dnd.move.parentConstrainedGridMoveable.js

dojo.declare('dojo.dnd.move.parentConstrainedGridMoveable', dojo.dnd.move.parentConstrainedMoveable, {

    gridSize: 10,

    /*
     * @param {HTMLElement} node
     * @param {int} params.gridSize
     */
    constructor: function(node, params){
        if(!params) params = {};
        this.gridSize = params && params.gridSize;
    },

    onMove: function(mover, leftTop){
        var c = this.constraintBox;
        var s = mover.node.style;
        var gridSize = this.gridSize;

        var left = (leftTop.l < c.l ? c.l : c.r < leftTop.l ? c.r : leftTop.l);
        var top = (leftTop.t < c.t ? c.t : c.b < leftTop.t ? c.b : leftTop.t);

        s.left = left - left % gridSize + 'px';
        s.top  = top - top % gridSize + 'px';
    }
});