/// <summary>
/// Attempt to focus a control in given container. Returns boolean declaring
/// if a control was focused.
/// </summary>
private bool Focus(IStaticContainerControl container, Rectf mouse)
{
// Container not enabled or does not accept mouse input,
// can't focus.
if (!container.Enabled || !container.AcceptsMouseInput)
{
return(false);
}
// Not inside container, can't have focus to anything then.
if (!Rectf.Intersects(container.CollisionBoundingBox, mouse))
{
return(false);
}
if (container.UseRenderTarget)
{
mouse = new Rectf(mouse.Position, mouse.Bounds);
}
for (var i = container.ControlsCount - 1; i >= 0; i--)
{
var child = container[i];
if (!child.Enabled ||
!child.Visible ||
!child.VisibleFromParent ||
!child.AcceptsMouseInput ||
!Rectf.Intersects(child.CollisionBoundingBox, mouse))
{
continue;
}
if (child is IStaticContainerControl inner)
{
// Keep track of the currently focused control.
var last = Context.Mouse;
// Attempt to focus to inner container.
if (Focus(inner, mouse))
{
return(true);
}
// If the currently focused control changed, focus has changed.
// In other case, keep looking for the control that could contain the
// focus.
var current = Context.Mouse;
if (!ReferenceEquals(current, last))
{
return(true);
}
// If no focus was applied to any child control, apply focus to current container.
Context.Mouse?.Defocus();
inner.Focus();
}
else
{
// Do not refocus if focused control has not changed.
if (ReferenceEquals(Context.Mouse, child))
{
return(true);
}
Context.Mouse?.Defocus();
child.Focus();
}
}
return(false);
}
public bool IsHovering(Rectf area) => Rectf.Intersects(area, new Rectf(CurrentLocalPosition, UiCanvas.ToLocalUnits(Vector2.One)));