[RESOLVED] Capture Multiple Key Presses

Hey guys!

I'm looking to trigger an event in my form that requires users to press a certain sequence of keys on my form, say red or blue. I'm unsure how to do this.

I know how to check for since key instances but not multiples so any help would be greatly appreciated as always.

Cheers.

You simply need to remember what's gone before, e.g.

csharp Code:

private int keyPresses = 0;
 
private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
    switch (e.KeyChar)
    {
        case 'a':
            // 'a' is always the first key in the sequence.
            this.keyPresses = 1;
            break;
        case 'b':
            // if 'b' follows 'a' then progress, otherwise start over.
            this.keyPresses = (this.keyPresses == 1 ? 2 : 0);
            break;
        case 'c':
            // if 'c' follows 'a' and 'b' then progress, otherwise start over.
            this.keyPresses = (this.keyPresses == 2 ? 3 : 0);
            break;
        case 'd':
            // if 'd' follows 'a', 'b' and 'c' then complete the sequence.
            if (this.keyPresses == 3)
            {
                MessageBox.Show("You pressed abcd!");
            }
 
            // Start over.
            this.keyPresses = 0;
            break;
        default:
            // Start over on any other key.
            this.keyPresses = 0;
            break;
    }
}

That worked perfectly. I figured it would be something along those lines but I couldn't get it right. Looks like my more complex solution was at fault. Oh well.

Thanks!

Edit: If anyone is interested here is the code I used. it's a slightly modified version of the one above and should give more customizability.

csharp Code:

private Dictionary<int, char> secret_code = new Dictionary<int, char>()
{
  {0, 't'},
  {1, 'e'},
  {2, 's'},
  {3, 't'}
};
 
private void frmMain_KeyPress(object sender, KeyPressEventArgs e)
{
  if (e.KeyChar == secret_code[key_presses])
  {
    if (key_presses == (secret_code.Count() - 1))
    {
      this.key_presses = 0;
      MessageBox.Show("You sound the secret!", "Congratulations!", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }
    else
    {
      ++this.key_presses;
    }
  }
  else
  {
    this.key_presses = 0;
  }
}