/// <summary>
/// Updated if required the position of the arm dependent on
/// the given rects.
///
/// Caution:
/// - Only the first rect found will be used to update the
/// position.
/// - It assumes that the width is specified in the ui and
/// the height is dynamic.
/// </summary>
/// <param name="rects">List of rects.</param>
private void UpdateArmPosition(IEnumerable <Rect> rects)
{
// Determine if a re-positing of the arm is required.
var rect = rects.FirstOrDefault();
var rectCenter = rect.X + (rect.Width / 2);
var isMovementRequired = Math.Abs(rectCenter - previewControlSize.Width) > ARM_RELOCATION_CENTER_THRESHHOLD;
// Ensure that a movement is required.
if (isMovementRequired == false)
{
Debug.WriteLine("OK");
return;
}
// If the face is left of the preview center.
if (rectCenter < previewControlSize.Width)
{
// move to the right.
NegativePanCommand.Execute(null);
}
// If the face is left of the preview center.
else if (rectCenter > previewControlSize.Width)
{
// move to the left.
PositivePanCommand.Execute(null);
}
}
/// <summary>
/// Should be called externally to listen on key
/// down events.
///
/// Caution:
/// - It only listens on Gamepad keys.
/// </summary>
/// <param name="args"></param>
public void OnKeyDown(KeyEventArgs args)
{
// Ensure that controller selection mode is
// selected and no cool down is active.
if (isKeyDownCooldownActive || selectedMode != HomeBearTiltControlMode.XBOX_CONTROLLER)
{
return;
}
// Listen on pressed keys.
// Use only GamePad ones and trigger actions.
switch (args.VirtualKey)
{
// Stick upwards.
case VirtualKey.GamepadLeftThumbstickUp:
PositiveTiltCommand.Execute(null);
break;
// Stick downwards.
case VirtualKey.GamepadLeftThumbstickDown:
NegativeTiltCommand.Execute(null);
break;
// Stick to the left.
case VirtualKey.GamepadLeftThumbstickLeft:
PositivePanCommand.Execute(null);
break;
// Stick to the right.
case VirtualKey.GamepadLeftThumbstickRight:
NegativePanCommand.Execute(null);
break;
}
// Start cool down timer.
keyDownCooldownTimer = ThreadPoolTimer.CreateTimer(CooldownTimer_Tick, KEYDOWN_COOLDOWN_SECONDS);
}