void tagCloudVisualNode_NodeActivated(TagCloudVisualNode node)
{
int childCount = 0;
ICollection collection = node.ContentObject as ICollection;
if (collection != null)
{
childCount = collection.Count;
}
if (childCount > 0)
{
_selectedNode = null;
if (!_parents.ContainsKey(node.ContentObject))
{
_parents.Add(node.ContentObject, _currentRoot);
}
PopulateItems(node.ContentObject);
}
else
{
if (ItemActivated != null)
{
ItemActivated(node.ContentObject);
}
}
}
void tagCloudVisualNode_NodeSelected(TagCloudVisualNode node)
{
if (_selectedNode != null)
{
_selectedNode.IsSelected = false;
}
_selectedNode = node;
if (_selectedNode != null)
{
_selectedNode.IsSelected = true;
}
if (ItemSelected != null)
{
ItemSelected(node == null ? null : node.ContentObject);
}
}
private void PopulateItems(object root)
{
_currentRoot = root;
_panelItems.Children.Clear();
double minValue = 1;
double maxValue = 0;
double minPixel = 20;
double maxPixel = 40;
IEnumerable enumerable = _currentRoot as IEnumerable;
if (enumerable != null)
{
IEnumerator iEnum = enumerable.GetEnumerator();
iEnum.Reset();
while (iEnum.MoveNext())
{
IRelevance relevance = iEnum.Current as IRelevance;
if (relevance != null)
{
if (relevance.Relevance != -1)
{
if (relevance.Relevance < minValue)
{
minValue = relevance.Relevance;
}
if (relevance.Relevance > maxValue)
{
maxValue = relevance.Relevance;
}
}
}
}
double weightRange = maxValue - minValue;
if (weightRange == 0)
{
weightRange = 1;
}
double pixelWeightScale = (maxPixel - minPixel) / weightRange;
iEnum.Reset();
while (iEnum.MoveNext())
{
TagCloudVisualNode tagCloudVisualNode = new TagCloudVisualNode();
tagCloudVisualNode.NodeActivated += new TagCloudVisualNode.NodeActivatedEventHandler(tagCloudVisualNode_NodeActivated);
tagCloudVisualNode.NodeSelected += new TagCloudVisualNode.NodeSelectedEventHandler(tagCloudVisualNode_NodeSelected);
tagCloudVisualNode.ContentObject = iEnum.Current;
double relval = 1;
IRelevance relevance = iEnum.Current as IRelevance;
if (relevance != null)
{
relval = relevance.Relevance;
}
tagCloudVisualNode.LabelFontSize = minPixel + (((relval == -1 ? minValue : relval) - minValue) * pixelWeightScale);
_panelItems.Children.Add(tagCloudVisualNode);
}
}
buttonUpOneLevel.Visibility = _currentRoot == _originalRoot ? Visibility.Collapsed : Visibility.Visible;
}
private static void OnSelectedBrushChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TagCloudVisualNode source = d as TagCloudVisualNode;
source.rectangleSelected.Fill = source.SelectedBrush;
}
