private static void Main(string[] args)
{
Console.WriteLine("======= Demonstration of Command =======");
var doc = new Document();
const string line1 = "Chapter: The command pattern.";
const string line2 = "Section 1: Problem";
const string line3 = "Command is a pattern that makes behavior an object.";
Console.WriteLine("======= First - using method calls =======");
doc.Write(line1);
doc.Write(line2);
doc.Write(line3);
Console.WriteLine(doc);
Console.WriteLine("---> Erasing last entered line");
doc.Erase(line3);
Console.WriteLine(doc);
Console.WriteLine("======= Next - command objects assigned to F1..F3 =======");
doc = new Document();
// Create the commands
ICommand write1 = new WriteCommand(doc, line1);
ICommand write2 = new WriteCommand(doc, line2);
ICommand write3 = new WriteCommand(doc, line3);
// Note - nothing has happened to the document yet!
// assign bindings to the F1 keys
var f1 = new FKey();
var f2 = new FKey();
var f3 = new FKey();
// assign write commands to the keys
f1.Assign(write1);
f2.Assign(write2);
f3.Assign(write3);
// next press F1 to F3 and see the result in the document
f1.Press();
f2.Press();
f3.Press();
Console.WriteLine(doc);
// reassigning F2
Console.WriteLine("======= F2 reassigned and pressed =======");
ICommand write4 = new WriteCommand(doc, "A wrong line");
f2.Assign(write4);
f2.Press();
Console.WriteLine(doc);
// undoing the last operation
Console.WriteLine("======= Undo of last insert =======");
write4.Undo();
Console.WriteLine(doc);
Console.WriteLine("======= Next - macro magic =======");
doc = new Document();
var macro1 = new WriteCommand(doc, "Hello world!");
var marco2 = new WriteCommand(doc, "Hello world, again...");
var marco3 = new WriteCommand(doc, "Hello world, again and again...");
ICommand macroCommand = new MacroCommand(doc, new[] { macro1, marco2, marco3});
var macroKey = new FKey();
macroKey.Assign(macroCommand);
macroKey.Press();
Console.WriteLine(doc);
macroCommand.Undo();
Console.WriteLine(doc);
Console.Read();
}
public MacroCommand(Document document, IList<ICommand> commands)
{
_document = document;
_commands = commands;
}