Problems with updateAndRepaintWindow

[Litanol]

Hello!

I've been trying for 2 days using the updateAndRepaintWindow function in my code, but it won't work!
Here's my code:

        private class MyChangeListener implements ChangeListener
        {
                public void stateChanged(ChangeEvent changeEvent)
                {
                        JSlider slider = (JSlider) changeEvent.getSource();
                       
                        // Need to divide the value with 100 so it turns to a float value (from int, because JSlider uses only int)
        multiplierForThreshold = (float) (slider.getValue() / 100.0);
        findMultiplierTextField.setText(Float.toString(multiplierForThreshold));
       
        if (!slider.getValueIsAdjusting()) {

        // Threshold the image with the value of multiplierForThreshold which has been chosen by JSlider
        // I've created the StackThresholder class myself. In brief, it sets a threshold for a image stack
                  StackThresholder myStackThresholder = new StackThresholder(multiplierForThreshold);
                                imp = myStackThresholder.threshold (originalImages, 9);
                               
                                // Making the image show up only one time
                                if(showCounter == 0)
                                {
                                        imp.show();
                                        showCounter++;
                                }
                               
                                // Makes the images using black-white mode somehow
                                imp.setStack(imp.getStack ());
                               
                                imp.updateAndRepaintWindow();
// imp.show();
                }
                }
        }


It works fine to update the image sequence by using "imp.show();", but I don't want it to pop-up a new window everytime a choose a new "multiplierForThreshold".

So, how can I make this work with "imp.updateAndRepaintWindow();" instead?


// Litanol

[Michael Schmid]

Hi Litanol,

imp.setStack(imp.getStack()) kills the threshold of the current image.

The threshold is held only by the ImageProcessor that you get by  
imp.getProcessor(). ImagePlus.setStack replaces this ImageProcessor  
by a new one.

Also note that an ImagePlus, even if containing a stack, can hold  
only one ImageProcessor, so the threshold is the same for all slices.  
When changing the slice, only the data in imp.getProcessor() are  
changed, its other properties remain the same.

Of course, if you want to APPLY a threshold, i.e. convert the image  
to binary, you can do this with different values for each slice.

Michael
________________________________________________________________

On 3 Jun 2010, at 21:28, Litanol wrote:

> Hello!
>
> I've been trying for 2 days using the updateAndRepaintWindow  
> function in my
> code, but it won't work!
> Here's my code:
>
> private class MyChangeListener implements ChangeListener
> {
> public void stateChanged(ChangeEvent changeEvent)
> {
> JSlider slider = (JSlider) changeEvent.getSource();
>
> // Need to divide the value with 100 so it turns to a float  
> value (from
> int, because JSlider uses only int)
>         multiplierForThreshold = (float) (slider.getValue() / 100.0);
>
> findMultiplierTextField.setText(Float.toString
> (multiplierForThreshold));
>        
>         if (!slider.getValueIsAdjusting()) {
>
>         // Threshold the image with the value of  
> multiplierForThreshold
> which has been chosen by JSlider
>         // I've created the StackThresholder class myself. In  
> brief, it
> sets a threshold for a image stack
>           StackThresholder myStackThresholder = new
> StackThresholder(multiplierForThreshold);
> imp = myStackThresholder.threshold (originalImages, 9);
>
> // Making the image show up only one time
> if(showCounter == 0)
> {
> imp.show();
> showCounter++;
> }
>
> // Makes the images using black-white mode somehow
> imp.setStack(imp.getStack ());
>
> imp.updateAndRepaintWindow();
> // imp.show();
>        }
> }
> }
>
>
> It works fine to update the image sequence by using "imp.show();",  
> but I
> don't want it to pop-up a new window everytime a choose a new
> "multiplierForThreshold".
>
> So, how can I make this work with "imp.updateAndRepaintWindow();"  
> instead?
>
>
> // Litanol
> --
> View this message in context: http://imagej.588099.n2.nabble.com/ 
> Problems-with-updateAndRepaintWindow-tp5136553p5136553.html
> Sent from the ImageJ mailing list archive at Nabble.com.