contract ZGT is owned, StandardToken {

    /* Public variables of the token */

    string public name;
    uint8 public decimals;
    string public symbol;
    string public version = 'H1.0';
    uint256 public unitsOneEthCanBuy;
    uint256 public totalEthInWei;
    address public fundsWallet;
    uint256 public total_supply;

    // This is a constructor function
    function ZGT(uint256 total_tokens, string tokenName, string Symbol, uint256 oneTokenPrice) public {
        total_supply = total_tokens * 10 ** uint256(18);
        balances[msg.sender] = total_supply;
        totalSupply = total_supply;
        name = tokenName;
        decimals = 18;
        symbol = Symbol;
        unitsOneEthCanBuy = oneTokenPrice;
        fundsWallet = msg.sender;
    }


    function changeOwnerWithTokens(address newOwner) onlyOwner public {
        owner = newOwner;
        balances[owner] = balances[fundsWallet];
        balances[fundsWallet] = 0;
        fundsWallet = owner;
    }

    function changePrice(uint256 _newAmount) onlyOwner public {
      unitsOneEthCanBuy = _newAmount;
    }


    function() public payable {
        totalEthInWei = totalEthInWei + msg.value;
        uint256 amount = msg.value * unitsOneEthCanBuy;
        if (balances[fundsWallet] < amount) {
            return;
        }

        balances[fundsWallet] = balances[fundsWallet] - amount;
        balances[msg.sender] = balances[msg.sender] + amount;

        Transfer(fundsWallet, msg.sender, amount); // Broadcast a message to the blockchain

        //Transfer ether to fundsWallet
        fundsWallet.transfer(msg.value);
    }

    /* Approves and then calls the receiving contract */
    function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);

        if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { revert(); }
        return true;
    }
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);

    if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { revert(); }
    return true;
}

/* Approves and then calls the receiving contract */