/// <summary>
/// Called by the child to notice that it wants
/// to change its size or Visibility.
/// </summary>
/// <param name="child">Child willing to resize.</param>
/// <param name="requestedSize">Size the child wants in the widget.</param>
/// <returns>True if resizement granted, false otherwise.</returns>
public bool ResizeForChild(Widget child, Vector2f requestedSize)
{
// May be position of the child widget has changed
// and we just want to update the parent accordingly
// so we musn't check if requestedSize is the same as before
// in the view to NOT froward properly the event.
ChildResizeEvent ev = new ChildResizeEvent(child, requestedSize);
OnEvent(ev);
if (ev.Accepted)
{
OnChildResizeEvent(ev);
if (ev.Accepted)
{
// We actually need to resize.
if (ev.NecessaryParentSize.X > Size.X || ev.NecessaryParentSize.Y > Size.Y)
{
// Tries to resize to the given size.
Vector2f newSize = Resize(ev.NecessaryParentSize);
// Check if we resized enough to place the widget in...
if (newSize.X < ev.NecessaryParentSize.X || newSize.Y < ev.NecessaryParentSize.Y)
return false;
}
return true;
}
}
return false;
}
/// <summary>
/// Raised when a child widget wants to change its size.
/// </summary>
/// <param name="childResizeEvent"></param>
public virtual void OnChildResizeEvent(ChildResizeEvent childResizeEvent)
{
childResizeEvent.NecessaryParentSize = _computeNewSizeForChild(childResizeEvent.Child, childResizeEvent.RequestedSize);
if (childResizeEvent.NecessaryParentSize.X > MaxSize.X || childResizeEvent.NecessaryParentSize.Y > MaxSize.Y)
childResizeEvent.Accepted = false;
}
