/// <summary>
/// Reaction of ROI objects to the 'mouse button down' event: changing
/// the shape of the ROI and adding it to the ROIList if it is a 'seed'
/// ROI.
/// </summary>
/// <param name="imgX">x coordinate of mouse event</param>
/// <param name="imgY">y coordinate of mouse event</param>
/// <returns></returns>
public int mouseDownAction(double imgX, double imgY)
{
int idxROI = -1;
double max = 10000, dist = 0;
double epsilon = 35.0; //maximal shortest distance to one of
//the handles
if (roiMode != null) //either a new ROI object is created
{
roiMode.createROI(imgX, imgY);
ROIList.Add(roiMode);
roiMode = null;
activeROIidx = ROIList.Count - 1;
viewController.repaint();
NotifyRCObserver(ROIController.EVENT_CREATED_ROI);
}
else if (ROIList.Count > 0) // ... or an existing one is manipulated
{
// identify activated ROI
activeROIidx = -1;
for (int i = 0; i < ROIList.Count; i++)
{
dist = ((ROI)ROIList[i]).distToClosestHandle(imgX, imgY);
if ((dist < max) && (dist < epsilon))
{
max = dist;
idxROI = i;
}
}//end of for
//
if (idxROI >= 0)
{
activeROIidx = idxROI;
NotifyRCObserver(ROIController.EVENT_ACTIVATED_ROI);
}
//viewController.repaint();
NotifyRCObserver(ROIController.EVENT_REPAINT_ROI);
}
return(activeROIidx);
}
