Exemplo n.º 1
0
        public override Fragment GetItem(int position)
        {
            var fragment = FragmentContainer.CreateInstance(_page.Children[position]);

            _fragments.Add(fragment);

            return(fragment);
        }
Exemplo n.º 2
0
        Fragment GetFragment(Page page, bool removed, bool popToRoot)
        {
            // pop
            if (removed)
            {
                return(_fragmentStack[_fragmentStack.Count - 2]);
            }

            // pop to root
            if (popToRoot)
            {
                return(_fragmentStack[0]);
            }

            // push
            return(FragmentContainer.CreateInstance(page));
        }
Exemplo n.º 3
0
        void InsertPageBefore(Page page, Page before)
        {
            if (!_isAttachedToWindow)
            {
                PushCurrentPages();
            }

            UpdateToolbar();

            int index = PageController.InternalChildren.IndexOf(before);

            if (index == -1)
            {
                throw new InvalidOperationException("This should never happen, please file a bug");
            }

            Fragment fragment = FragmentContainer.CreateInstance(page);

            _fragmentStack.Insert(index, fragment);
        }
Exemplo n.º 4
0
        protected override void AddChildView(VisualElement childView)
        {
            _pageContainer = null;

            Page page = childView as NavigationPage ?? (Page)(childView as TabbedPage);

            if (page == null)
            {
                // The thing we're adding is not a NavigationPage or TabbedPage, so we can just use the old AddChildView

                if (_currentFragment != null)
                {
                    if (!_parent.IsAttachedToRoot())
                    {
                        return;
                    }

                    // But first, if the previous occupant of this container was a fragment, we need to remove it properly
                    FragmentTransaction transaction = FragmentManager.BeginTransactionEx();
                    transaction.RemoveEx(_currentFragment);
                    transaction.SetTransitionEx((int)FragmentTransit.None);

                    if (IsAttachedToWindow)
                    {
                        ExecuteTransaction(transaction);
                    }
                    else
                    {
                        _transaction = transaction;
                    }

                    _currentFragment = null;
                }

                base.AddChildView(childView);
            }
            else
            {
                if (!_parent.IsAttachedToRoot())
                {
                    return;
                }

                // The renderers for NavigationPage and TabbedPage both host fragments, so they need to be wrapped in a
                // FragmentContainer in order to get isolated fragment management
                Fragment fragment = FragmentContainer.CreateInstance(page);

                var fc = fragment as FragmentContainer;

                fc?.SetOnCreateCallback(pc =>
                {
                    _pageContainer = pc;
                    UpdateFlowDirection();
                    SetDefaultBackgroundColor(pc.Child);
                });

                FragmentTransaction transaction = FragmentManager.BeginTransactionEx();

                if (_currentFragment != null)
                {
                    transaction.RemoveEx(_currentFragment);
                }

                transaction.AddEx(Id, fragment);
                transaction.SetTransitionEx((int)FragmentTransit.None);

                if (IsAttachedToWindow)
                {
                    ExecuteTransaction(transaction);
                }
                else
                {
                    _transaction = transaction;
                }

                _currentFragment = fragment;
            }
        }