Re: Changing the line width of a freeline roi for displaying in a non-destrutive graphics overlay

Posted by Michael Schmid on Mar 31, 2008; 2:52pm
URL: http://imagej.273.s1.nabble.com/Changing-the-line-width-of-a-freeline-roi-for-displaying-in-a-non-destrutive-graphics-overlay-tp3696734p3696735.html

Hi Fernando,

to understand the problem, you should have a look at the
addElement method in your code.
I guess that you have copied it from
http://rsb.info.nih.gov/ij/plugins/download/ 
MultiColor_Graphic_Overlay.java

        void addElement(Vector list, Shape shape, Color color, int lineWidth) {
                Roi roi = new ShapeRoi(shape);
                roi.setInstanceColor(color);
                roi.setLineWidth(lineWidth);
                list.addElement(roi);
        }

It requires the second argument to have class Shape.

Michael
________________________________________________________________

On 31 Mar 2008, at 16:42, Fernando Sales wrote:

> Hi,
>
> I've been problems to change the line width of a freeline roi for  
> displaying
> it in a non-destrutive graphics overlay. I've made some tests based  
> on the
> example below.
> http://rsb.info.nih.gov/ij/plugins/download/ 
> MultiColor_Graphic_Overlay.java
>
> There is a piece of the code.
>
> // Initalization
> ImagePlus imp = WindowManager.getCurrentImage();
> ImageCanvas ic = imp.getCanvas();
> Vector list = new Vector();
> int select = 4; // Parameter for select the ROi of interest
> IJ.run("Add to Manager ");
> IJ.runMacro("roiManager(\"Open\",\"C:\\\\Basutto1.zip\")"); // Load  
> the roi
> for ROI Manager
> IJ.runMacro("roiManager(\"Select\","+select+ ")"); // Select thr  
> roi of
> interest
>
> If the code below is used, the roi don't change the line width:
>
> Roi roi = imp.getRoi();
> addElement(list,roi,Color.red,4);
> ic.setDisplayList(list);
> ic.repaint();
> IJ.runMacro("roiManager(\"Select\","+(select+1)+ ")");
> Roi roi1 = imp.getRoi();
> addElement(list,roi1,Color.green,1);
> ic.repaint();
>
> But, if i use this code (creating a ShapeRoi, adjusting the line  
> width and
> after deleting this ShapeRoi) it works:
>
> Roi roi = imp.getRoi();
> Shape shape = (Shape) roi.getPolygon();
> addElement(list, shape, Color.BLACK, 2);
> list.remove(shape);
> addElement(list,roi,Color.red,4);
> ic.setDisplayList(list);
> ic.repaint();
> IJ.runMacro("roiManager(\"Select\","+(select+1)+ ")");
> Roi roi1 = imp.getRoi();
> addElement(list,roi1,Color.green,1);
> ic.repaint();
> }
>
> What kind of problem is happening? I can't see the difference  
> between this
> two pieces of code...is there somebody who could help me?
>
> Thanks,
> --
> **************************************************
> Fernando José Ribeiro Sales
> **************************************************
> Email: [hidden email]
> Tel: [phone]
> **************************************************