Problem with Brightness / Contrast dialog in Plug-in

[Vasilescu,Dan]

Greetings,
 
I am writing a plug-in where I try to apply the user preferences (Min and Max values) from a previous session to a Brightness / Contrast dialog box.
A simplified version of this would be:
 
     IJ.run("Brightness/Contrast...");
     IJ.getImage().getProcessor().setMinAndMax(Min,Max);

The image is adjusted correctly and the dialog box gets the new settings. The problem is that the controls inside the dialog box (histogram and scrollbars) are not adjusted to reflect the change.
The real problem seems to be that ij.plugin.frame.ContrastAdjuster class was not designed to be used programatically, but only in the context of user/GUI interaction.
 
I have a few solutions, like creating a helper class inside ij.plugin.frame package, or use the java reflection API and override all access control, or even generate a IJ script to mimic user interaction.
However, they feel too much like a hack - and it's very likely that sooner or later some code modification will force me to redo the work all over again.
 
I am rather new to ImageJ and there may be other solutions which I could not think of. Comments from the experts on this forum would be greatly appreciated.
Thank you!
 
 
Dan Vasilescu
Center for Cell Analysis and Modeling, (vcell.org)
University of Connecticut Heath Center
263 Farmington Ave
Farmington, CT 06030

[Wayne Rasband]

Starting with ImageJ 1.38l, plugins can call the ContrastAdjuster's  
update() method to update the controls in the "B&C" window. Here is  
an example:

     IJ.run("Brightness/Contrast...");
     IJ.getImage().getProcessor().setMinAndMax(min,max);
     ContrastAdjuster.update();

This is what it looks like in macro code:

     run("Brightness/Contrast...");
     setMinAndMax(min,max);
     call("ij.plugin.frame.ContrastAdjuster.update");

-wayne

 > Greetings,

 > I am writing a plug-in where I try to apply the user preferences  
(Min and
 > Max values) from a previous session to a Brightness / Contrast  
dialog box.
 >
 >A simplified version of this would be:
 >      IJ.run("Brightness/Contrast...");
 >      IJ.getImage().getProcessor().setMinAndMax(Min,Max);
 >
 > The image is adjusted correctly and the dialog box gets the new  
settings.
 > The problem is that the controls inside the dialog box (histogram and
 > scrollbars) are not adjusted to reflect the change.
 >
 > The real problem seems to be that ij.plugin.frame.ContrastAdjuster
 > class was not designed to be used programatically, but only in the
 > context of user/GUI interaction.
 >
 > I have a few solutions, like creating a helper class inside  
ij.plugin.frame
 > package, or use the java reflection API and override all access  
control,
 > or even generate a IJ script to mimic user interaction.
 >
 > However, they feel too much like a hack - and it's very likely that
 > sooner or later some code modification will force me to redo the
 > work all over again.
 >
 > I am rather new to ImageJ and there may be other solutions which
 > I could not think of. Comments from the experts on this forum
 > would be greatly appreciated.
 >
 > Thank you!

 > Dan Vasilescu
 > Center for Cell Analysis and Modeling, (vcell.org)
 > University of Connecticut Heath Center
 > 263 Farmington Ave
 > Farmington, CT 06030

[Vasilescu,Dan]

Wayne,

I appreciate your help, this is the perfect solution for my problem.
Many thanks for the speed as well, I am impressed.
Regards,
Dan
 

        -----Original Message-----
        From: ImageJ Interest Group on behalf of Rasband Wayne
        Sent: Sat 3/3/2007 10:53 PM
        To: [hidden email]
        Cc:
        Subject: Re: Problem with Brightness / Contrast dialog in Plug-in
       
       

        Starting with ImageJ 1.38l, plugins can call the ContrastAdjuster's
        update() method to update the controls in the "B&C" window. Here is
        an example:
       
             IJ.run("Brightness/Contrast...");
             IJ.getImage().getProcessor().setMinAndMax(min,max);
             ContrastAdjuster.update();
       
        This is what it looks like in macro code:
       
             run("Brightness/Contrast...");
             setMinAndMax(min,max);
             call("ij.plugin.frame.ContrastAdjuster.update");
       
        -wayne
       
         > Greetings,
       
         > I am writing a plug-in where I try to apply the user preferences
        (Min and
         > Max values) from a previous session to a Brightness / Contrast
        dialog box.
         >
         >A simplified version of this would be:
         >      IJ.run("Brightness/Contrast...");
         >      IJ.getImage().getProcessor().setMinAndMax(Min,Max);
         >
         > The image is adjusted correctly and the dialog box gets the new
        settings.
         > The problem is that the controls inside the dialog box (histogram and
         > scrollbars) are not adjusted to reflect the change.
         >
         > The real problem seems to be that ij.plugin.frame.ContrastAdjuster
         > class was not designed to be used programatically, but only in the
         > context of user/GUI interaction.
         >
         > I have a few solutions, like creating a helper class inside
        ij.plugin.frame
         > package, or use the java reflection API and override all access
        control,
         > or even generate a IJ script to mimic user interaction.
         >
         > However, they feel too much like a hack - and it's very likely that
         > sooner or later some code modification will force me to redo the
         > work all over again.
         >
         > I am rather new to ImageJ and there may be other solutions which
         > I could not think of. Comments from the experts on this forum
         > would be greatly appreciated.
         >
         > Thank you!
       
         > Dan Vasilescu
         > Center for Cell Analysis and Modeling, (vcell.org)
         > University of Connecticut Heath Center
         > 263 Farmington Ave
         > Farmington, CT 06030