/// <summary>
/// 清除所有建立的 ROI对象
/// </summary>
public void reset()
{
ROIList.Clear();
activeROIidx = -1;
ModelROI = null;
roiMode = null;
NotifyRCObserver(EVENT_DELETED_ALL_ROIS);
}
/// <summary>
/// ROI对象对'mouse button down'事件的反应:改变ROI的形状，如果是“Seed”ROI，则将其添加到ROIList中。
/// </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; //到一个handles的最大直线距离
if (roiMode == null) //创建一个新的ROI对象
{
try
{
roiMode.createROI(imgX, imgY);
ROIList.Add(roiMode);
roiMode = null;
activeROIidx = ROIList.Count - 1;
viewController.repaint();
NotifyRCObserver(ROIController.EVENT_CREATED_ROI);
}
catch (Exception)
{ }
}
else if (ROIList.Count > 0) //或者对现有的一个Roi进行操控
{
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;
}
}
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>
///为了创建一个新的ROI对象，应用程序类初始化了一个
///“Seed”ROI实例化，并将其传递给ROIController。
/// ROIController现在通过操纵这个新的ROI来回应
///实例
/// </summary>
/// <param name="r">
///“Seed”ROI对象由application forms类转发.
/// </param>
public void setROIShape(ROI r)
{
roiMode = r;
roiMode.setOperatorFlag(stateROI);
}
