Not sure how I would do this

I have a map editor where there are tiles in the form of MovieClip. Then there are tiles on the side that you can choose from. Once you select a tile and click on a tile on the map it will change to that tile. But I would also be able to click and hold the mouse to change multiple tiles at once (the ones that I drag over while the mouse is down). Now the whole map is on one big movieclip. Could I just set a click event listener on the whole map, then add another event listener for mouse over on the tiles itself? Or is there a better way to go about this?