SMART datagrid v.1 > Classes > GridBase
It will be fired after changing the horizontal location (horizontally scrolled) being displayed in grid by clicking scroll button or setting leftPos.
After scrolling the row, onTopIndexChanged event will be fired.
grid.onLeftPosChanged = function (grid, newPos, oldPos) {
console.log('Grid horz scrolled: ' + oldPos + ' => ' + newPos;
};