Esempio n. 1
0
 protected void ApplyTemplate()
 {
     ReleaseVisualTree();
     ControlTemplate template = Template ?? DefaultControlTemplate;
     _visualTree = template(this);
     // TODO: OnApplyTemplate
 }
Esempio n. 2
0
File: Region.cs Progetto: Aethon/odo
 public static Region GetRegion(UiElement descendant)
 {
     while (descendant != null && !(descendant is Region))
     {
         descendant = descendant.Parent;
     }
     return (Region)descendant;
 }
Esempio n. 3
0
 public Generation(object item, UiElement container)
 {
     Container = container;
     Item = item;
 }
Esempio n. 4
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 public void ReleaseContainer(UiElement container)
 {
     for (int i = _generations.Count - 1; i >= 0; i--)
     {
         if (((Generation)_generations[i]).Container == container)
         {
             _generations.RemoveAt(i);
             break;
         }
     }
 }
Esempio n. 5
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 public object GetItemForContainer(UiElement container)
 {
     for (int i = _generations.Count - 1; i >= 0; i--)
     {
         Generation g = (Generation)_generations[i];
         if (g.Container == container)
         {
             return g.Item;
         }
     }
     return null;
 }
Esempio n. 6
0
        public int GetIndexForContainer(UiElement container)
        {
            object item = GetItemForContainer(container);
            if (item == null)
                return -1;

            return ((ArrayListExt) (object) _allItems()).BinarySearch(item, _comparer);
        }
Esempio n. 7
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        public int GetIndexForContainer(UiElement container)
        {
            object item = GetItemForContainer(container);
            if (item == null)
                return -1;

            return _allItems.IndexOf(item);
        }
Esempio n. 8
0
 protected void ReleaseVisualTree()
 {
     // TODO
     _visualTree = null;
 }
Esempio n. 9
0
        private void Synchronize(bool clear)
        {
            int available = GetAvailableItemCount();
            bool changed = false;

            if (_scroller != null)
            {
                if (clear || (available == 0))
                {
                    if (_itemContainerGenerator != null)
                    {
                        _desiredFirstItem = _itemContainerGenerator.GetIndexForContainer(_firstItemContainer);
                        if (_desiredFirstItem < 0)
                        {
                            _desiredFirstItem = _firstItem;
                        }
                    }
                    for (int i = Math.Max(_firstRealizedItem, 0); i <= _lastRealizedItem; i++)
                    {
                        ReleaseContainer(i);
                        changed = true;
                    }
                    _firstItem = -1;
                    _firstItemContainer = null;
                    _lastItem = -1;
                    _firstRealizedItem = -1;
                    _lastRealizedItem = -1;
                }

                if (available > 0)
                {
                    _content.Height(available*_fixedItemHeight);

                    _desiredFirstItem = Math.Max(0, Math.Min(_desiredFirstItem, GetAvailableItemCount()));

                    if (_desiredFirstItem != _firstItem)
                    {
                        changed = true;
                    }

                    int firstRequired = _desiredFirstItem;
                    int viewSize = _scroller.GetInnerHeight();
                    double buffer = viewSize / (double)_fixedItemHeight;
                    int usableBuffer = Math.Floor(buffer);
                    int lastRequired = firstRequired + usableBuffer - 1;
                    if (lastRequired > available - 1)
                    {
                        int overshot = lastRequired - available + 1;
                        firstRequired = Math.Max(firstRequired - overshot, 0);
                        lastRequired = available - 1;
                    }
                    int firstAllowed = firstRequired - 2;
                    int lastAllowed = lastRequired + 2;

                    _firstItem = firstRequired;
                    _desiredFirstItem = _firstItem;
                    _firstItemContainer = _itemContainerGenerator.GetContainerForIndex(_firstItem);
                    _lastItem = lastRequired;
                    if (buffer - usableBuffer > 0)
                    {
                        lastRequired = Math.Min(lastRequired + 1, available - 1);
                    }

                    ShowScrollbar((_firstItem > 0) || (_viewportLines < available));

                    int layoutWidth = _content.GetInnerWidth();

                    // add any missing elements
                    for (int i = firstRequired; i <= lastRequired; i++)
                    {
                        if (_realizedItems[i] == null)
                        {
                            changed = true;
                            UiElement item = _itemContainerGenerator.GenerateContainer(i);
                            _realizedItems[i] = item;
                            item.Parent = this;

                            item.Measure(new Size(layoutWidth, _fixedItemHeight));

                            AxisArrangement v = ArrangeAxis(item.YAxis, item.MeasuredSize.Height, _fixedItemHeight);
                            v.Position += i * _fixedItemHeight;

                            item.Arrange(ArrangeAxis(item.XAxis, item.MeasuredSize.Width, _content.GetInnerWidth()),
                                v, _content[0]);
                        }
                    }

                    // show the new items
                    _content.CSS("top", (-firstRequired * _fixedItemHeight) + "px");

                    // remove any unnecessary elements)
                    for (int i = Math.Max(_firstRealizedItem, 0); i < firstAllowed; i++)
                    {
                        ReleaseContainer(i);
                    }
                    for (int i = lastAllowed + 1; i <= _lastRealizedItem; i++)
                    {
                        ReleaseContainer(i);
                    }

                    _firstRealizedItem = Math.Min(firstRequired, Math.Max(firstAllowed, _firstRealizedItem));
                    _lastRealizedItem = Math.Max(lastRequired, Math.Min(lastAllowed, _lastRealizedItem));

                }
                else
                {
                    ShowScrollbar(false);
                }
            }

            if (changed && Changed != null)
            {
                Changed();
            }
        }