onColumnResize

fires when the width of a column was changed

function onColumnResize(
    // the id of the column
    id: string,
    // the new width set for the column
    newWidth: number,
    // the previous width of the column
    oldWidth: number,
    // true if the column was resized by a user action
    user_action: boolean
): void

Example

grid.attachEvent("onColumnResize",
  function(id,newWidth,oldWidth,user_action){
    alert("New column width: " + this.getColumnConfig(id).width );
  });