/// <summary>
/// Fits an <see cref="ISpatial"/> into the grid so that all sides are snapped to the grid.
/// The <paramref name="spatial"/> must support both <see cref="ISpatial.SupportsMove"/> and
/// <see cref="ISpatial.SupportsResize"/>.
/// </summary>
/// <param name="forceAlign">When true, aligning to the grid will be forced.</param>
/// <param name="spatial">The <see cref="ISpatial"/>.</param>
public void Fit(ISpatial spatial, bool forceAlign = false)
{
if (spatial == null)
{
return;
}
if (!WillAlign && !forceAlign)
{
return;
}
if (!spatial.SupportsMove || !spatial.SupportsResize)
{
return;
}
var pos = Align(spatial, forceAlign);
if (!spatial.TryMove(pos))
{
return;
}
var size = Resize(spatial, forceAlign);
spatial.TryResize(size);
}
/// <summary>
/// Handles when the mouse cursor moves while this <see cref="ITransBox"/> is selected.
/// </summary>
/// <param name="cursorWorldPos">The amount the cursor has moved.</param>
public void CursorMoved(Vector2 cursorWorldPos)
{
_position = cursorWorldPos - (Size / 2f);
var delta = cursorWorldPos - _selectPos;
// Handle move, which is easy enough
if (_type == TransBoxType.Move)
{
_spatial.TryMove(Align(_spatialInitPos + delta));
return;
}
// Handle resizing, which is the harder part
var resizeVector = GetResizeVector(_type);
var newSize = _spatialInitSize + (delta * resizeVector);
newSize = Align(_spatialInitPos + newSize) - _spatialInitPos;
newSize = Vector2.Max(Vector2.One, newSize);
var sizeDelta = newSize - _spatialInitSize;
var moveVector = sizeDelta * Vector2.Min(resizeVector, Vector2.Zero);
var newPos = _spatialInitPos + moveVector;
// When resizing with a negative vector (so resizing to the left or up), offset the position so that the
// right/bottom side remains in the same place. If the resize vector is 0, ensure it does not resize.
var alignPos = Align(newPos);
if (resizeVector.X < 0)
{
newSize.X += newPos.X - alignPos.X;
newPos.X = alignPos.X;
}
else if (resizeVector.X == 0)
{
newSize.X = _spatialInitSize.X;
}
if (resizeVector.Y < 0)
{
newSize.Y += newPos.Y - alignPos.Y;
newPos.Y = alignPos.Y;
}
else if (resizeVector.Y == 0)
{
newSize.Y = _spatialInitSize.Y;
}
// Apply the new size and position
if (!_spatial.TryResize(newSize))
{
return;
}
_spatial.TryMove(newPos);
}
/// <summary>
/// Fits an <see cref="ISpatial"/> into the grid so that all sides are snapped to the grid.
/// The <paramref name="spatial"/> must support both <see cref="ISpatial.SupportsMove"/> and
/// <see cref="ISpatial.SupportsResize"/>.
/// </summary>
/// <param name="forceAlign">When true, aligning to the grid will be forced.</param>
/// <param name="spatial">The <see cref="ISpatial"/>.</param>
public void Fit(ISpatial spatial, bool forceAlign = false)
{
if (spatial == null)
return;
if (!WillAlign && !forceAlign)
return;
if (!spatial.SupportsMove || !spatial.SupportsResize)
return;
var pos = Align(spatial, forceAlign);
if (!spatial.TryMove(pos))
return;
var size = Resize(spatial, forceAlign);
spatial.TryResize(size);
}