protected virtual bool OnChildrenWillBeRemoved(EventArgs args)
{
if (d_itemModel == null)
{
return(false);
}
var model_args = (ModelEventArgs)args;
var itemsToBeRemoved = new List <ModelIndexSelectionState>();
foreach (var state in d_indexSelectionStates)
{
if (state.d_childId >= model_args.d_startId &&
state.d_childId <= model_args.d_startId + model_args.d_count)
{
if (d_itemModel.AreIndicesEqual(d_lastSelectedIndex, state.d_selectedIndex))
{
d_lastSelectedIndex = new ModelIndex(0);
}
itemsToBeRemoved.Add(state);
}
}
foreach (var state in itemsToBeRemoved)
{
d_indexSelectionStates.Remove(state);
}
return(true);
}
/// <summary>
/// Updates the rendering state for the specified \a item using the specified
/// \a index as the data source.
/// </summary>
/// <param name="item"></param>
/// <param name="index"></param>
/// <param name="maxWidth"></param>
/// <param name="totalHeight"></param>
private void UpdateItem(ListViewItemRenderingState item, ModelIndex index, ref float maxWidth, ref float totalHeight)
{
var text = d_itemModel.GetData(index);
var isSelected = IsIndexSelected(index);
var initialColours = isSelected ? _selectionTextColourRect : d_textColourRect;
var renderedString = GetRenderedStringParser().Parse(text, GetFont(), initialColours);
item.d_string = renderedString;
item.d_index = index;
item.d_text = text;
item.d_icon = d_itemModel.GetData(index, ItemDataRole.IDR_Icon);
var iconSize = Sizef.Zero;
if (!String.IsNullOrEmpty(item.d_icon))
{
iconSize = ImageManager.GetSingleton().Get(item.d_icon).GetRenderedSize();
}
var textSize = new Sizef(renderedString.GetHorizontalExtent(this), renderedString.GetVerticalExtent(this));
item.d_size = new Sizef(iconSize.Width + textSize.Width, Math.Max(iconSize.Height, textSize.Height));
maxWidth = Math.Max(item.d_size.Width, maxWidth);
totalHeight += item.d_size.Height;
item.d_isSelected = isSelected;//IsIndexSelected(index);
}
public override int GetChildCount(ModelIndex modelIndex)
{
if (modelIndex.d_modelData == null)
{
return(d_root.GetChildren().Count);
}
return(((GenericItem)modelIndex.d_modelData).GetChildren().Count);
}
public override ModelIndex MakeIndex(int child, ModelIndex parentIndex)
{
if (parentIndex.d_modelData == null)
{
return(new ModelIndex());
}
var item = (GenericItem)parentIndex.d_modelData;
return(MakeValidIndex(child, item.GetChildren()));
}
public override int CompareIndices(ModelIndex index1, ModelIndex index2)
{
if (!IsValidIndex(index1) || !IsValidIndex(index2) ||
index1.d_modelData == index2.d_modelData)
{
return(0);
}
/// TODO: ...
//if (GetItemForIndex(index1) < GetItemForIndex(index2))
// return -1;
return(GetItemForIndex(index1) == GetItemForIndex(index2) ? 0 : 1);
}
public override ModelIndex GetParentIndex(ModelIndex modelIndex)
{
if (modelIndex.d_modelData == d_root)
{
return(new ModelIndex());
}
var item = (GenericItem)modelIndex.d_modelData;
if (item.GetParent() == null)
{
return(GetRootIndex());
}
return(new ModelIndex(item.GetParent()));
}
private TreeViewItemRenderingState ComputeRenderingStateForIndex(ModelIndex parentIndex, int childId, int nestedLevel, ref float renderedMaxWidth, ref float renderedTotalHeight)
{
var index = d_itemModel.MakeIndex(childId, parentIndex);
var state = new TreeViewItemRenderingState(this)
{
d_nestedLevel = nestedLevel,
d_parentIndex = parentIndex,
d_childId = childId
};
FillRenderingState(state, index, ref renderedMaxWidth, ref renderedTotalHeight);
ComputeRenderedChildrenForItem(state, index, ref renderedMaxWidth, ref renderedTotalHeight);
return(state);
}
/// <summary>
/// Adds the item as child of the specified parent, at the specified position.
///
/// After the addition, the \a parent's node will contain \a item as child
/// at the \a position.
/// </summary>
/// <param name="newItem"></param>
/// <param name="parentIndex"></param>
/// <param name="position"></param>
public virtual void AddItemAtPosition(GenericItem newItem, ModelIndex parentIndex, int position)
{
NotifyChildrenWillBeAdded(parentIndex, position, 1);
var parent = (GenericItem)parentIndex.d_modelData;
if (position > parent.GetChildren().Count)
{
throw new InvalidRequestException("The specified position is out of range.");
}
newItem.SetParent(parent);
parent.GetChildren().Insert(position, newItem);
NotifyChildrenAdded(parentIndex, position, 1);
}
/// <summary>
/// Ensures that the item specified by the \a index is visible by setting
/// the proper the vertical and horizontal scrollbars' position.
/// </summary>
/// <param name="index"></param>
public virtual void EnsureIndexIsVisible(ModelIndex index)
{
var vertScroll = GetVertScrollbar();
var horzScroll = GetHorzScrollbar();
var renderArea = GetViewRenderer().GetViewRenderArea();
var viewHeight = renderArea.Height;
var viewWidth = renderArea.Width;
var rect = GetIndexRect(index);
var bottom = rect.Bottom;
var top = rect.Top;
// account for current scrollbar value
var currPos = vertScroll.GetScrollPosition();
top -= currPos;
bottom -= currPos;
// if top is above the view area, or if item is too big to fit
if ((top < 0.0f) || ((bottom - top) > viewHeight))
{
// scroll top of item to top of box.
vertScroll.SetScrollPosition(currPos + top);
}
// if bottom is below the view area
else if (bottom >= viewHeight)
{
// position bottom of item at the bottom of the list
vertScroll.SetScrollPosition(currPos + bottom - viewHeight);
}
var left = rect.Left - currPos;
var right = left + rect.Width;
// if left is left of the view area, or if item too big
if ((left < renderArea.d_min.X) || ((right - left) > viewWidth))
{
// scroll item to left
horzScroll.SetScrollPosition(currPos + left);
}
// if right is right of the view area
else if (right >= renderArea.d_max.X)
{
// scroll item to right of list
horzScroll.SetScrollPosition(currPos + right - viewWidth);
}
}
protected int GetSelectedIndexPosition(ModelIndex index)
{
if (d_itemModel == null)
{
return(0);
}
for (var i = 0; i < d_indexSelectionStates.Count; ++i)
{
if (d_itemModel.AreIndicesEqual(index, d_indexSelectionStates[i].d_selectedIndex))
{
return(i);
}
}
return(-1);
}
protected override Rectf GetIndexRect(ModelIndex index)
{
var childId = d_itemModel.GetChildId(index);
if (childId == -1)
{
return(Rectf.Zero);
}
var pos = Lunatics.Mathematics.Vector2.Zero;
for (var i = 0; i < childId; ++i)
{
pos.Y += d_items[i].d_size.Height;
}
return(new Rectf(pos, d_items[childId].d_size));
}
private void ComputeRenderedChildrenForItem(TreeViewItemRenderingState item, ModelIndex index,
ref float renderedMaxWidth, ref float renderedTotalHeight)
{
var childCount = d_itemModel.GetChildCount(index);
item.d_totalChildCount = childCount;
if (!item.d_subtreeIsExpanded)
{
return;
}
for (var child = 0; child < childCount; ++child)
{
item.d_children.Add(ComputeRenderingStateForIndex(index, child, item.d_nestedLevel + 1, ref renderedMaxWidth, ref renderedTotalHeight));
}
item.SortChildren();
}
private void FillRenderingState(TreeViewItemRenderingState item, ModelIndex index, ref float renderedMaxWidth, ref float renderedTotalHeight)
{
var text = d_itemModel.GetData(index);
var renderedString = GetRenderedStringParser().Parse(text, GetFont(), d_textColourRect);
item.d_string = renderedString;
item.d_text = text;
item.d_icon = d_itemModel.GetData(index, ItemDataRole.IDR_Icon);
item.d_size = new Sizef(renderedString.GetHorizontalExtent(this),
renderedString.GetVerticalExtent(this));
float indent = GetViewRenderer().GetSubtreeExpanderXIndent(item.d_nestedLevel) + GetViewRenderer().GetSubtreeExpanderSize().Width;
renderedMaxWidth = Math.Max(renderedMaxWidth, item.d_size.Width + indent);
renderedTotalHeight += item.d_size.Height;
item.d_isSelected = IsIndexSelected(index);
}
protected void SetupTooltip(Lunatics.Mathematics.Vector2 position)
{
if (d_itemModel == null)
{
return;
}
var index = IndexAt(position);
if (d_itemModel.AreIndicesEqual(index, _lastModelIndex))
{
return;
}
var tooltip = GetTooltip();
if (tooltip == null)
{
return;
}
if (tooltip.GetTargetWindow() != this)
{
tooltip.SetTargetWindow(this);
}
else
{
tooltip.PositionSelf();
}
_lastModelIndex = index;
if (!d_itemModel.IsValidIndex(index))
{
SetTooltipText("");
}
else
{
SetTooltipText(d_itemModel.GetData(index, ItemDataRole.IDR_Tooltip));
}
}
/// <summary>
/// Sets the ItemModel to be used inside this view.
/// </summary>
/// <param name="itemModel"></param>
public virtual void SetModel(ItemModel itemModel)
{
if (itemModel == d_itemModel)
{
return;
}
if (d_itemModel != null)
{
DisconnectModelEvents();
d_lastSelectedIndex = new ModelIndex(0);
}
d_itemModel = itemModel;
ConnectToModelEvents();
d_indexSelectionStates.Clear();
d_needsFullRender = true;
OnSelectionChanged(new ItemViewEventArgs(this));
}
public override string GetData(ModelIndex modelIndex, ItemDataRole role = ItemDataRole.IDR_Text)
{
if (!IsValidIndex(modelIndex))
{
return("");
}
var item = (GenericItem)modelIndex.d_modelData;
if (role == ItemDataRole.IDR_Text)
{
return(item.GetText());
}
if (role == ItemDataRole.IDR_Icon)
{
return(item.GetIcon());
}
if (role == ItemDataRole.IDR_Tooltip)
{
return("Tooltip for " + item.GetText());
}
return("");
}
public TreeViewItemRenderingState GetTreeViewItemForIndex(ModelIndex index)
{
var idsStack = new Stack <int>();
var rootIndex = d_itemModel.GetRootIndex();
var tempIndex = index;
// we create a stack of child ids which will allow us to drill back
// in the right hierarchy.
do
{
var id = d_itemModel.GetChildId(tempIndex);
if (id == -1)
{
break;
}
idsStack.Push(id);
tempIndex = d_itemModel.GetParentIndex(tempIndex);
} while (d_itemModel.IsValidIndex(tempIndex) && !d_itemModel.AreIndicesEqual(tempIndex, rootIndex));
var item = d_rootItemState;
while (idsStack.Count != 0)
{
var childId = idsStack.Pop();
if (childId >= item.d_children.Count)
{
return(null);
}
item = item.d_children[childId];
}
return(item);
}
/// <summary>
/// Gets the underlying TGenericItem represented by the given \a index or
/// NULL if the index does not represent a valid item.
///
/// This method is the inverse of to getIndexForItem(const GenericItem*).
/// </summary>
/// <param name="index"></param>
/// <returns></returns>
public virtual T GetItemForIndex(ModelIndex index)
{
return((T)index.d_modelData);
}
/// <summary> /// Returns the Rectf that contains the specified \a index. /// </summary> /// <param name="index"></param> /// <returns></returns> protected abstract Rectf GetIndexRect(ModelIndex index);
public override bool AreIndicesEqual(ModelIndex index1, ModelIndex index2)
{
return(CompareIndices(index1, index2) == 0);
}
public override bool IsValidIndex(ModelIndex modelIndex)
{
return(modelIndex.d_modelData != null);
}
public virtual bool SetIndexSelectionState(ModelIndex index, bool selected)
{
return(HandleSelection(index, selected, d_isMultiSelectEnabled, false));
}
public virtual bool IsIndexSelected(ModelIndex index)
{
return(GetSelectedIndexPosition(index) != -1);
}
public virtual void RemoveItem(ModelIndex index)
{
RemoveItem(GetItemForIndex(index));
}
/// <summary>
/// Sets the item specified by the \a index as the currently selected one.
/// </summary>
/// <param name="index"></param>
/// <returns>
/// True if the index has been successfully selected, false otherwise.
/// </returns>
public virtual bool SetSelectedIndex(ModelIndex index)
{
// simple calls of this method shouldn't do cumulative selection
return(HandleSelection(index, true, false, false));
}
/// <summary>
///
/// </summary>
/// <param name="wnd"></param>
/// <param name="index"></param>
public ItemViewEventArgs(ItemView wnd, ModelIndex index)
: base(wnd)
{
d_index = index;
}
protected override bool HandleSelection(ModelIndex index, bool shouldSelect, bool isCumulative, bool isRange)
{
return(base.HandleSelection(index, shouldSelect, isCumulative, isRange));
}
protected virtual bool HandleSelection(ModelIndex index, bool shouldSelect, bool isCumulative, bool isRange)
{
if (d_itemModel == null ||
!d_itemModel.IsValidIndex(index))
{
return(false);
}
var indexPosition = GetSelectedIndexPosition(index);
if (indexPosition != -1)
{
if (!shouldSelect)
{
d_indexSelectionStates.RemoveAt(/*d_indexSelectionStates.begin() + */ indexPosition);
OnSelectionChanged(new ItemViewEventArgs(this, index));
return(true);
}
// if we select the node again, and we don't cumulate selection, we need
// to make just that one be selected now
if (isCumulative)
{
return(true);
}
}
if (!isCumulative)
{
d_indexSelectionStates.Clear();
}
var parentIndex = d_itemModel.GetParentIndex(index);
var endChildId = d_itemModel.GetChildId(index);
var startChildId = endChildId;
if (isRange && isCumulative && d_lastSelectedIndex.d_modelData != null)
{
startChildId = d_itemModel.GetChildId(d_lastSelectedIndex);
}
for (var id = startChildId; id <= endChildId; ++id)
{
var selectionState = new ModelIndexSelectionState
{
d_selectedIndex = d_itemModel.MakeIndex(id, parentIndex)
};
// ignore already selected indices
if (GetSelectedIndexPosition(selectionState.d_selectedIndex) != -1)
{
continue;
}
selectionState.d_childId = id;
selectionState.d_parentIndex = parentIndex;
d_indexSelectionStates.Add(selectionState);
}
d_lastSelectedIndex = index;
OnSelectionChanged(new ItemViewEventArgs(this, index));
return(true);
}
public override int GetChildId(ModelIndex modelIndex)
{
return(GetChildId(GetItemForIndex(modelIndex)));
}
protected override Rectf GetIndexRect(ModelIndex index)
{
//TODO: implement for tree view. What do we do for indices in closed subtrees?
throw new InvalidRequestException("Not implemented for tree view yet.");
}
