/// <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);
}
protected override bool OnChildrenAdded(EventArgs args)
{
base.OnChildrenAdded(args);
var margs = (ModelEventArgs)args;
if (!d_itemModel.AreIndicesEqual(margs.d_parentIndex, d_itemModel.GetRootIndex()))
{
return(true);
}
var items = new List <ListViewItemRenderingState>();
for (var i = 0; i < margs.d_count; ++i)
{
var item = new ListViewItemRenderingState(this);
UpdateItem(item, d_itemModel.MakeIndex(margs.d_startId + i, margs.d_parentIndex), ref d_renderedMaxWidth, ref d_renderedTotalHeight);
items.Add(item);
}
d_items.InsertRange(margs.d_startId, items);
//TODO: insert in the right place directly!
ResortListView();
InvalidateView(false);
return(true);
}
public override void PrepareForRender()
{
base.PrepareForRender();
if (d_itemModel == null || !IsDirty())
{
return;
}
if (d_needsFullRender)
{
d_renderedMaxWidth = d_renderedTotalHeight = 0;
d_items.Clear();
}
var rootIndex = d_itemModel.GetRootIndex();
var childCount = d_itemModel.GetChildCount(rootIndex);
for (var child = 0; child < childCount; ++child)
{
var index = d_itemModel.MakeIndex(child, rootIndex);
if (d_needsFullRender)
{
var state = new ListViewItemRenderingState(this);
UpdateItem(state, index, ref d_renderedMaxWidth, ref d_renderedTotalHeight);
d_items.Add(state);
}
else
{
var item = d_items[child];
d_renderedTotalHeight -= item.d_size.Height;
UpdateItem(item, index, ref d_renderedMaxWidth, ref d_renderedTotalHeight);
}
}
UpdateScrollbars();
SetIsDirty(false);
ResortListView();
d_needsFullRender = false;
}
