public ICmd Exec()
{
var inverse = new RestoreBackgroundColor(cell, cell.getBGColor()); //create inverse object
cell.setBGColor(BGColor); //restore the cell's previous background color
return(inverse); //return inverse object to add to the undo or redo stack
}
public void pushToUndoBGColorGroup(List <Cell> list) //push group of color changes to undo stack
{
List <ICmd> cmds = new List <ICmd>();
for (int i = 0; i < list.Count; i++) //loop through list of cells to create list of restore background color objects
{
RestoreBackgroundColor temp = new RestoreBackgroundColor(list[i], list[i].getBGColor());
cmds.Add(temp);
}
MultiCmd mcmd = new MultiCmd(cmds); //create new multi command object
mcmd.setMessage(" change in background color of cells");
undo.Push(mcmd); //add multi command object to list
}