API equivalent of Overlay.drawString()

[Aryeh Weiss]

The macro language has an Overlay.drawString("text", x, y) function that
creates a nondestructive text overlay.

What is  the equivalent API command or commands for doing this in a
Python script?

Tnx in advance
--aryeh

--
Aryeh Weiss
Faculty of Engineering
Bar Ilan University
Ramat Gan 52900 Israel

Ph:  972-3-5317638
FAX: [phone]


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[Wayne Rasband-2]

> On Jan 28, 2018, at 12:46 PM, Aryeh Weiss <[hidden email]> wrote:
>
> The macro language has an Overlay.drawString("text", x, y) function that creates a nondestructive text overlay.
>
> What is  the equivalent API command or commands for doing this in a Python script?

Create a TextRoi and add it to the overlay. Here is a JavaScript example:

  img = IJ.openImage("http://wsr.imagej.net/images/blobs.gif");
  text = "These three lines\nwill be overlayed\non the image.";
  font = new Font("SansSerif", Font.PLAIN, 24);
  roi = new TextRoi(10, 10, text, font);
  roi.setStrokeColor(Color.white);
  roi.setFillColor(Color.blue);
  overlay = new Overlay();
  overlay.add(roi);
  img.setOverlay(overlay);
  img.show();

-wayne
 

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[Aryeh Weiss]

Hi Wayne

Thank you for the quick response.

I got this to work as a Python script, but I am unable to get the
JavaScript to work because JS is not importing the classes. I get errors
like
nashorn:mozilla_compat.js:67 ReferenceError: "Font" is not defined
even with auto import set active.

I was able to fix this one with importPackage(java.awt),
but then I got the same error for Overlay.
I tried importPackage(ij.gui), but I then got an error that ij is
undefined, and I could not find a way around that.

According to https://imagej.nih.gov/ij/developer/javascript.html#import
these classes should all be imported by default in JS.

Best regards,
--aryeh

On 28/01/2018 23:26, Wayne Rasband wrote:

>> On Jan 28, 2018, at 12:46 PM, Aryeh Weiss <[hidden email]> wrote:
>>
>> The macro language has an Overlay.drawString("text", x, y) function that creates a nondestructive text overlay.
>>
>> What is  the equivalent API command or commands for doing this in a Python script?
> Create a TextRoi and add it to the overlay. Here is a JavaScript example:
>
>    img = IJ.openImage("http://wsr.imagej.net/images/blobs.gif");
>    text = "These three lines\nwill be overlayed\non the image.";
>    font = new Font("SansSerif", Font.PLAIN, 24);
>    roi = new TextRoi(10, 10, text, font);
>    roi.setStrokeColor(Color.white);
>    roi.setFillColor(Color.blue);
>    overlay = new Overlay();
>    overlay.add(roi);
>    img.setOverlay(overlay);
>    img.show();
>
> -wayne
>    
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

--
Aryeh Weiss
Faculty of Engineering
Bar Ilan University
Ramat Gan 52900 Israel

Ph:  972-3-5317638
FAX: [phone]

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ImageJ mailing list: http://imagej.nih.gov/ij/list.html

[Jan Eglinger]

Hi Aryeh,

On 29.01.2018 06:04, Aryeh Weiss wrote:
 > I tried importPackage(ij.gui), but I then got an error that ij is
 > undefined, and I could not find a way around that.

This should work:

importPackage(Packages.ij.gui);
or
importClass(Packages.ij.gui.Overlay);


Note that it is always safer to explicitly specify the classes you want
to import, instead of relying on package-wide auto-import.

See also:
https://stackoverflow.com/q/147454/1919049
https://imagej.net/Script_Editor_Auto_Import

Jan


On 29.01.2018 06:04, Aryeh Weiss wrote:

> Hi Wayne
>
> Thank you for the quick response.
>
> I got this to work as a Python script, but I am unable to get the
> JavaScript to work because JS is not importing the classes. I get errors
> like
> nashorn:mozilla_compat.js:67 ReferenceError: "Font" is not defined
> even with auto import set active.
>
> I was able to fix this one with importPackage(java.awt),
> but then I got the same error for Overlay.
> I tried importPackage(ij.gui), but I then got an error that ij is
> undefined, and I could not find a way around that.
>
> According to https://imagej.nih.gov/ij/developer/javascript.html#import
> these classes should all be imported by default in JS.
>
> Best regards,
> --aryeh
>
> On 28/01/2018 23:26, Wayne Rasband wrote:
>>> On Jan 28, 2018, at 12:46 PM, Aryeh Weiss <[hidden email]> wrote:
>>>
>>> The macro language has an Overlay.drawString("text", x, y) function
>>> that creates a nondestructive text overlay.
>>>
>>> What is  the equivalent API command or commands for doing this in a
>>> Python script?
>> Create a TextRoi and add it to the overlay. Here is a JavaScript example:
>>
>>    img = IJ.openImage("http://wsr.imagej.net/images/blobs.gif");
>>    text = "These three lines\nwill be overlayed\non the image.";
>>    font = new Font("SansSerif", Font.PLAIN, 24);
>>    roi = new TextRoi(10, 10, text, font);
>>    roi.setStrokeColor(Color.white);
>>    roi.setFillColor(Color.blue);
>>    overlay = new Overlay();
>>    overlay.add(roi);
>>    img.setOverlay(overlay);
>>    img.show();
>>
>> -wayne
>>
>> --
>> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>>
>

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ImageJ mailing list: http://imagej.nih.gov/ij/list.html

[Aryeh Weiss]

Hi Jan

Thank you for your reply.

On 29/01/2018 12:47, Jan Eglinger wrote:

> Hi Aryeh,
>
> On 29.01.2018 06:04, Aryeh Weiss wrote:
> > I tried importPackage(ij.gui), but I then got an error that ij is
> > undefined, and I could not find a way around that.
>
> This should work:
>
> importPackage(Packages.ij.gui);
> or
> importClass(Packages.ij.gui.Overlay);
>

I did not know to add Packages in front of ij.gui. Now I get it.
>
> Note that it is always safer to explicitly specify the classes you
> want to import, instead of relying on package-wide auto-import.
>
Yes, and I generally use the auto-import when testing out something
"quick and dirty", before putting it int a better constructed script.

Best regards
--aryeh

> See also:
> https://stackoverflow.com/q/147454/1919049
> https://imagej.net/Script_Editor_Auto_Import
>
> Jan
>
>
> On 29.01.2018 06:04, Aryeh Weiss wrote:
>> Hi Wayne
>>
>> Thank you for the quick response.
>>
>> I got this to work as a Python script, but I am unable to get the
>> JavaScript to work because JS is not importing the classes. I get
>> errors like
>> nashorn:mozilla_compat.js:67 ReferenceError: "Font" is not defined
>> even with auto import set active.
>>
>> I was able to fix this one with importPackage(java.awt),
>> but then I got the same error for Overlay.
>> I tried importPackage(ij.gui), but I then got an error that ij is
>> undefined, and I could not find a way around that.
>>
>> According to https://imagej.nih.gov/ij/developer/javascript.html#import
>> these classes should all be imported by default in JS.
>>
>> Best regards,
>> --aryeh
>>
>> On 28/01/2018 23:26, Wayne Rasband wrote:
>>>> On Jan 28, 2018, at 12:46 PM, Aryeh Weiss <[hidden email]> wrote:
>>>>
>>>> The macro language has an Overlay.drawString("text", x, y) function
>>>> that creates a nondestructive text overlay.
>>>>
>>>> What is  the equivalent API command or commands for doing this in a
>>>> Python script?
>>> Create a TextRoi and add it to the overlay. Here is a JavaScript
>>> example:
>>>
>>>    img = IJ.openImage("http://wsr.imagej.net/images/blobs.gif");
>>>    text = "These three lines\nwill be overlayed\non the image.";
>>>    font = new Font("SansSerif", Font.PLAIN, 24);
>>>    roi = new TextRoi(10, 10, text, font);
>>>    roi.setStrokeColor(Color.white);
>>>    roi.setFillColor(Color.blue);
>>>    overlay = new Overlay();
>>>    overlay.add(roi);
>>>    img.setOverlay(overlay);
>>>    img.show();
>>>
>>> -wayne
>>>
>>> --
>>> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>>>
>>
>

--
Aryeh Weiss
Faculty of Engineering
Bar Ilan University
Ramat Gan 52900 Israel

Ph:  972-3-5317638
FAX: [phone]

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ImageJ mailing list: http://imagej.nih.gov/ij/list.html