Move object within canvas boundary limit

Question

I am trying to limit the moving object within the canvas but i am getting some difficulty to moving object with limit area on top and left side and when i scale the object w

Answer 1

As i needed this, here is my overworked function based on Balaji's code to set a offset, so objects can be only partly showed within the canvas.

canvas.on('object:moving', function (e) {
      var obj = e.target;

      // if object is too big ignore
      if(obj.currentHeight > obj.canvas.height || obj.currentWidth > obj.canvas.width){
          return;
      }        

      // set offset for moving out the canvas (20 % of object persists in canvas)
      var offsetWidth = obj.getBoundingRect().width * 0.8;
      var offsetHeight = obj.getBoundingRect().height * 0.8;

      obj.setCoords();        

      // top-left  corner
      if(obj.getBoundingRect().top < -offsetHeight || obj.getBoundingRect().left < -offsetWidth){
          obj.top = Math.max(obj.top, obj.top-(obj.getBoundingRect().top+offsetHeight));
          obj.left = Math.max(obj.left, obj.left-(obj.getBoundingRect().left+offsetWidth));
      }
      // bot-right corner
      if(obj.getBoundingRect().top+obj.getBoundingRect().height  > obj.canvas.height + offsetHeight || obj.getBoundingRect().left+obj.getBoundingRect().width  > obj.canvas.width + offsetWidth){
          obj.top = Math.min(obj.top, obj.canvas.height-obj.getBoundingRect().height+obj.top-obj.getBoundingRect().top+offsetHeight);
          obj.left = Math.min(obj.left, obj.canvas.width-obj.getBoundingRect().width+obj.left-obj.getBoundingRect().left+offsetWidth);
      }
});