/// <summary>
/// Handles the MouseDown event when the plot point tool is selected
/// </summary>
/// <param name="position">Mouse position.</param>
/// <param name="e">The mouse event args</param>
public override void OnMouseDown(PointD2D position, MouseButtonEventArgs e)
{
base.OnMouseDown(position, e);
var graphXY = _grac.ConvertMouseToRootLayerCoordinates(position);
_grac.FindGraphObjectAtPixelPosition(position, true, out var clickedObject, out var clickedLayerNumber);
if (null != clickedObject && clickedObject.HittedObject is XYColumnPlotItem)
{
_PlotItem = (XYColumnPlotItem)clickedObject.HittedObject;
var transXY = clickedObject.Transformation.InverseTransformPoint(graphXY);
_layer = (XYPlotLayer)(clickedObject.ParentLayer);
XYScatterPointInformation scatterPoint = _PlotItem.GetNearestPlotPoint(_layer, transXY);
_PlotItemNumber = GetPlotItemNumber(_layer, _PlotItem);
if (null != scatterPoint)
{
_PlotIndex = scatterPoint.PlotIndex;
_RowIndex = scatterPoint.RowIndex;
// convert this layer coordinates first to PrintableAreaCoordinates
var rootLayerCoord = clickedObject.ParentLayer.TransformCoordinatesFromHereToRoot(scatterPoint.LayerCoordinates);
_positionOfCrossInRootLayerCoordinates = rootLayerCoord;
// m_Cross.X -= _grac.GraphViewOffset.X;
// m_Cross.Y -= _grac.GraphViewOffset.Y;
var newPixelCoord = _grac.ConvertGraphToMouseCoordinates(rootLayerCoord);
// TODO (Wpf)
//var newCursorPosition = new Point((int)(Cursor.Position.X + newPixelCoord.X - mouseXY.X),(int)(Cursor.Position.Y + newPixelCoord.Y - mouseXY.Y));
//SetCursorPos(newCursorPosition.X, newCursorPosition.Y);
DisplayData(_PlotItem, scatterPoint.RowIndex,
_PlotItem.XYColumnPlotData.XColumn[scatterPoint.RowIndex],
_PlotItem.XYColumnPlotData.YColumn[scatterPoint.RowIndex]);
// here we shoud switch the bitmap cache mode on and link us with the AfterPaint event
// of the grac
_grac.RenderOverlay(); // no refresh necessary, only invalidate to show the cross
}
}
} // end of function
