Use of showImageWithCancel("message") ?

[Alan Hewat]

According to the IJ doc
http://rsbweb.nih.gov/ij/developer/api/ij/IJ.html
showImageWithCancel("message")  should return "false" if CANCEL is
clicked and otherwise "true".

But in ImageJ 1.43o I get  the error "number or numeric function expected" for:

if(!showMessageWithCancel("Is this OK?")) showMessage("You clicked CANCEL");

I want to branch to alternative actions according to "OK" or "CANCEL".
So far as I can see showMessageWithCancel() acts just like
showMessage() except that it has a CANCEL button that simply exits the
routine :-(

Alan
______________________________________________
Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE
<[hidden email]> +33.476.98.41.68
        http://www.NeutronOptics.com/hewat
______________________________________________

[Michael Schmid]

Hi Alan,

at least in the current version of ImageJ, IJ.showMessageWithCancel  
should have two arguments:
public static boolean showMessageWithCancel(String title, String msg)


Michael
________________________________________________________________

On 3 Feb 2010, at 18:21, Alan Hewat wrote:

> According to the IJ doc
> http://rsbweb.nih.gov/ij/developer/api/ij/IJ.html
> showImageWithCancel("message")  should return "false" if CANCEL is
> clicked and otherwise "true".
>
> But in ImageJ 1.43o I get  the error "number or numeric function  
> expected" for:
>
> if(!showMessageWithCancel("Is this OK?")) showMessage("You clicked  
> CANCEL");
>
> I want to branch to alternative actions according to "OK" or "CANCEL".
> So far as I can see showMessageWithCancel() acts just like
> showMessage() except that it has a CANCEL button that simply exits the
> routine :-(
>
> Alan
> ______________________________________________
> Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE
> <[hidden email]> +33.476.98.41.68
>         http://www.NeutronOptics.com/hewat
> ______________________________________________

[Alan Hewat]

Thanks Michael, but I understand the "title" string is optional in
both showMessageWithCancel(); and showMessage(); and I checked that
including the title makes no difference.

Am I missing something fundamental here in that I should include some
IJ extension package perhaps ?

Alan.

On 3 February 2010 18:37, Michael Schmid <[hidden email]> wrote:

> Hi Alan,
>
> at least in the current version of ImageJ, IJ.showMessageWithCancel should
> have two arguments:
> public static boolean showMessageWithCancel(String title, String msg)
>
>
> Michael
> ________________________________________________________________
>
> On 3 Feb 2010, at 18:21, Alan Hewat wrote:
>
>> According to the IJ doc
>> http://rsbweb.nih.gov/ij/developer/api/ij/IJ.html
>> showImageWithCancel("message")  should return "false" if CANCEL is
>> clicked and otherwise "true".
>>
>> But in ImageJ 1.43o I get  the error "number or numeric function expected"
>> for:
>>
>> if(!showMessageWithCancel("Is this OK?")) showMessage("You clicked
>> CANCEL");
>>
>> I want to branch to alternative actions according to "OK" or "CANCEL".
>> So far as I can see showMessageWithCancel() acts just like
>> showMessage() except that it has a CANCEL button that simply exits the
>> routine :-(
>>
>> Alan

______________________________________________
Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE
<[hidden email]> +33.476.98.41.68
        http://www.NeutronOptics.com/hewat
______________________________________________

[Rasband, Wayne (NIH/NIMH) [E]]

On Feb 3, 2010, at 12:21 PM, Alan Hewat wrote:

> According to the IJ doc
> http://rsbweb.nih.gov/ij/developer/api/ij/IJ.html
> showImageWithCancel("message")  should return "false" if
> CANCEL is clicked and otherwise "true".
>
> But in ImageJ 1.43o I get  the error "number or numeric function expected" for:
>
> if(!showMessageWithCancel("Is this OK?")) showMessage("You clicked CANCEL");
>
> I want to branch to alternative actions according to "OK" or "CANCEL".
> So far as I can see showMessageWithCancel() acts just like
> showMessage() except that it has a CANCEL button that simply
> exits the routine :-(

The API docs at
   http://rsbweb.nih.gov/ij/developer/api/ij/IJ.html
are for plugin and JavaScript writers. Macro writers should be looking at the descriptions of the built in macro functions at
   http://rsbweb.nih.gov/ij/developer/macro/functions.html

Here is the description of the showMessageWithCancel() function:

    showMessageWithCancel(["title",]"message")
       Displays "message" in a dialog box with "OK" and "Cancel"
       buttons. "Title" (optional) is the dialog box title. The macro
       exits if the user clicks "Cancel" button.

It won't work because it causes the macro to exit when the user clicks "Cancel". What you want is the getBoolean() macro function:

   getBoolean("message")
      Displays a dialog box containing the specified message and
      "Yes", "No" and "Cancel" buttons. Returns true (1) if the user
      clicks "Yes", returns false (0) if the user clicks "No" and exits
      the macro if the user clicks "Cancel".

Here is an example:

     if (!getBoolean("Is this OK?"))
        showMessage("The user clicked 'No'");

-wayne