public static void UnregisterKeyReleased(int key, KeyReleasedEventHandler eventHandler)
{
if (keyReleased.ContainsKey(key))
{
keyReleased[key] -= eventHandler;
}
}
private void ScanThreadMethod()
{
var prevKey = -1;
while (_scanThreadActive)
{
var nbKey = 0;
// Scans the matrix
for (var i = 0; i < 4; i++)
{
for (var j = 0; j < 3; j++)
{
if (!ReadMatrix(i, j))
{
continue;
}
// A key has been pressed
var keyNum = (i * 3) + j + 1;
nbKey += keyNum;
if ((prevKey != keyNum) && (prevKey == -1)) // A key has been pressed and no other is currently pressed (avoids dealing with multiple keys at the same time)
{
prevKey = keyNum;
KeyPressedEventHandler tempEvent = KeyPressed;
tempEvent(this, new KeyPressedEventArgs(keyNum, KeytoChar(keyNum)));
}
break;
}
}
if (nbKey == 0) // No key pressed in this pass
{
// Was there a key pressed before ?
if (prevKey != -1)
{
KeyReleasedEventHandler tempEvent = KeyReleased;
tempEvent(this, new KeyReleasedEventArgs(prevKey, KeytoChar(prevKey)));
}
prevKey = -1;
}
// Leave time for other processes
Thread.Sleep(50);
}
}
