private void undo_Click(object sender, EventArgs e)
{
if (_commandStack.Count > 0)
{
// Remove the last command
iCommand lastCommand = _commandStack.Pop();
//jika command adalah freehandcommand
if (Convert.ToString(lastCommand).Contains("freehand"))
{
while (Convert.ToString(lastCommand).Contains("freehand") && _commandStack.Count > 0)
{
lastCommand = _commandStack.Pop();
lastCommand.Undo();
//jika ternyata lastcommand tidak freehand lagi
if (!Convert.ToString(lastCommand).Contains("freehand"))
{
//kembalikan ke stack
_commandStack.Push(lastCommand);
}
}
}
else
{
lastCommand.Undo();
}
panel1.Refresh();
}
}
private void erase_button_Click(object sender, EventArgs e)
{
if (_commandStack.Count > 0)
{
while (_commandStack.Count > 0)
{
iCommand lastCommand = _commandStack.Pop();
lastCommand.Undo();
}
panel1.Refresh();
}
}
