/// <summary>
/// Clears all variables managing ROI objects
/// </summary>
public void reset()
{
ROIList.Clear();
activeROIidx = -1;
ModelROI = null;
roiMode = null;
NotifyRCObserver(EVENT_DELETED_ALL_ROIS);
}
/// <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
{
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();
}
return(activeROIidx);
}
/// <summary>
/// Deletes this ROI instance if a 'seed' ROI object has been passed
/// to the ROIController by the application class.
///
/// </summary>
public void resetROI()
{
activeROIidx = -1;
roiMode = null;
}
/// <summary>
/// To create a new ROI object the application class initializes a
/// 'seed' ROI instance and passes it to the ROIController.
/// The ROIController now responds by manipulating this new ROI
/// instance.
/// </summary>
/// <param name="r">
/// 'Seed' ROI object forwarded by the application forms class.
/// </param>
public void setROIShape(ROI r)
{
roiMode = r;
roiMode.setOperatorFlag(stateROI);
}