/// <summary>
/// Clears the <see cref="KeysPressed"/>, <see cref="KeysDown"/>, <see cref="KeysReleased"/> collections.
/// </summary>
public void Clear()
{
KeysPressedInternal.Clear();
KeysDownInternal.Clear();
UnmappedVirtualKeysDown.Clear();
KeysReleasedInternal.Clear();
}
internal void RemoveKeyPressed(int i)
{
KeysPressedInternal.RemoveAt(i);
}
internal void AddKeyPressed(AsciiKey key, Keys unmappedVirtualKey)
{
KeysPressedInternal.Add(key);
}
/// <summary>
/// Reads the keyboard state using the <see cref="GameTime"/> from the update frame.
/// </summary>
/// <param name="gameTime"></param>
public void Update(GameTime gameTime)
{
KeysPressedInternal.Clear();
KeysReleasedInternal.Clear();
// Cycle all the keys down known if any are up currently, remove them from KeysDownInternal
_state = Microsoft.Xna.Framework.Input.Keyboard.GetState();
bool shiftPressed = _state.IsKeyDown(Keys.LeftShift) || _state.IsKeyDown(Keys.RightShift);
var unmappedVirtualKeys = _state.GetPressedKeys();
for (int i = 0; i < KeysDownInternal.Count;)
{
if (_state.IsKeyUp(UnmappedVirtualKeysDown[i]))
{
KeysReleasedInternal.Add(KeysDownInternal[i]);
RemoveKeyDownAt(i);
}
else
{
i++;
}
}
// KeysDownInternal now contains all the keys that are currently down except potentially newly pressed keys
// however the shift state may have changed so if there was an 'a' previously and the shift key was
// just pressed, then the 'a' needs to get replaced with 'A'.
// For all new keys down, if we don't know them, add them to pressed, add them to down.
foreach (var unmappedVirtualKey in unmappedVirtualKeys)
{
bool firstPressed = false;
AsciiKey key = new AsciiKey();
AsciiKey keyOppositeShift = new AsciiKey();
int activeKeyIndex = -1;
// These keys will be mapped since Fill does the mapping automatically
key.Fill(unmappedVirtualKey, shiftPressed, _state);
keyOppositeShift.Fill(unmappedVirtualKey, !shiftPressed, _state);
if (KeysDownInternal.Contains(key))
{
activeKeyIndex = KeysDownInternal.FindIndex(k => k == key);
var thisKey = KeysDownInternal[activeKeyIndex];
thisKey.TimeHeld += (float)gameTime.ElapsedGameTime.TotalSeconds;
KeysDownInternal[activeKeyIndex] = thisKey;
}
else if (KeysDownInternal.Contains(keyOppositeShift))
{
activeKeyIndex = KeysDownInternal.FindIndex(k => k == keyOppositeShift);
var thisKey = KeysDownInternal[activeKeyIndex];
thisKey.Character = key.Character;
thisKey.TimeHeld += (float)gameTime.ElapsedGameTime.TotalSeconds;
KeysDownInternal[activeKeyIndex] = thisKey;
}
else
{
// The physical key (independent of shift) for this character was not being pressed before
// so add it in.
firstPressed = true;
activeKeyIndex = KeysDownInternal.Count;
AddKeyDown(key, unmappedVirtualKey);
}
var activeKey = KeysDownInternal[activeKeyIndex];
if (firstPressed)
{
KeysPressedInternal.Add(activeKey);
}
else if (activeKey.PostInitialDelay == false && activeKey.TimeHeld >= InitialRepeatDelay)
{
activeKey.PostInitialDelay = true;
activeKey.TimeHeld = 0f;
KeysPressedInternal.Add(activeKey);
}
else if (activeKey.PostInitialDelay && activeKey.TimeHeld >= RepeatDelay)
{
activeKey.TimeHeld = 0f;
KeysPressedInternal.Add(activeKey);
}
}
}
/// <summary>
/// Returns true when the key is in the <see cref="KeysPressed"/> collection.
/// </summary>
/// <param name="key">The key to check.</param>
/// <returns>True when the key was considered first pressed.</returns>
public bool IsKeyPressed(AsciiKey key)
{
return(KeysPressedInternal.Contains(key));
}
/// <summary>
/// Returns true when the key is in the <see cref="KeysPressed"/> collection regardless of shift state.
/// </summary>
/// <param name="key">The key to check.</param>
/// <returns>True when the key was considered first pressed.</returns>
public bool IsKeyPressed(Keys key)
{
return(KeysPressedInternal.Contains(AsciiKey.Get(key, _state)) || KeysPressedInternal.Contains(AsciiKey.Get(key, true, _state)));
}
/// <summary> /// Returns true when the key is in the <see cref="KeysPressed"/> collection. /// </summary> /// <param name="key">The key to check.</param> /// <returns>True when the key was considered first pressed.</returns> public bool IsKeyPressed(AsciiKey key) => KeysPressedInternal.Contains(key);