/// <summary>
/// Find the Element at a pixel location
/// </summary>
/// <param name="PixelPosition"></param>
/// <returns>Null - not found or out of range</returns>
public override VisualisationElement GetElement(VectorInt PixelPosition)
{
VectorInt logical = PixelPosition.Subtract(RenderCanvas.TopLeft).Divide(cellSize);
if (logical.X > GridSize.X) return null;
if (logical.Y > GridSize.Y) return null;
return this[PixelPosition.Subtract(RenderCanvas.TopLeft).Divide(cellSize)];
}
/// <summary>
/// Find the Element at a pixel location
/// </summary>
/// <param name="PixelPosition"></param>
/// <returns>Null - not found or out of range</returns>
public override VisualisationElement GetElement(VectorInt PixelPosition)
{
VectorInt logical = PixelPosition.Subtract(windowRegion.TopLeft).Subtract(renderCanvas.TopLeft).Divide(cellSize);
int idx = logical.X + logical.Y*maxCellWidth;
if (idx < elements.Count) return elements[idx];
return null;
}
/// <summary>
/// From a pixel position find the relevant node element
/// </summary>
/// <param name="pixelPosition"></param>
/// <returns></returns>
public VisualisationElement GetNodeFromPixelPosition(VectorInt pixelPosition)
{
VectorInt logical = pixelPosition.Subtract(RenderRegion.TopLeft).Subtract(owner.summaryIndent, 0);
int idx = (logical.X / owner.cellSize.Width) + (logical.Y / owner.cellSize.Height) * MaxRegionNodeWidth;
if (idx < treeSegment.Count) return this[treeSegment.Nodes[idx]];
return null; // Not found
}