[SOLVED] Image problems

[redfield]

Hi guys,

I am trying to display an image at a certain location. Rather various images, therefore I put the image names into an array. Trying to display them gave me object expression errors. With all my different trials I am totally confused, so please forgive me when I don't post them and the relating errors. I have googled around and copied some code but also with this last try I am getting the error "no such object":

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put "/home/Documents/Pics/someImage.png" into varImage
put url("binfile:" & varImage) into imageNames[11]
put imageNames[11] into img "theImage"
set the location of image ""theImage" to 100,100

When I do an

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answer imageNames[11]

the result is something like []PNG and under it another []. Help please

[richmond62]

Dunno, but you could try this:

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put "/home/Documents/Pics/someImage.png" into varImage
put url("binfile:" & varImage) into imageNames[11]
set the filename of img "theImage" to imageNames[11]
set the location of image ""theImage" to 100,100

[SparkOut]

You have put the actual binary date of the image file into the array.

To set the filename of the image object, you want to give it the path you stored in the variable varImage. This will give a display of a "referenced image" - in other words the image data is stored in the external file and not part of the stackfile, just the reference is. So to move the stack you will also have to move or re-reference the external image files.

Or, to put the binary data that you imported into the array into the image for display, you can (oddly enough) set the text of the image. This will in essence "import" the data that becomes a part of the stack and will increase its size, but will be portable without having to make the external image files portable along with it.

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set the filename of image "theImage" to varName

or

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set the text of image "theImage" to imageNames[11]

[Edit]and you can also

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put url ("binfile:" & varName) into image "theImage"

as well as Klaus said. Additionally you could

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import paint from file varName
--but that will create a new image object each time, so you would want to name the new object whose long id is returned in the "it" variable after creation
set the name of it to "theNewImage" --or a different name each time you import

[Klaus]

Hi friends,

we actually CAN put binary stuff into any image and that will work!
Just tested this and it works of course:

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...
put url("binfile:/Volumes/1TB/Dokumente2/RRMC etc Hilfe/Andernfalls/Grafik/Koelnrockt_Logo_2011.jpg") into imageNames[11]
put imageNames[11] into img 1
...

Et voila, the image is displayed, also tested with a PNG image.
And redfield did not say he/she wants to set the filename of the image!

Could you please post a screenshot of the problem?


Best

Klaus

[Klaus]

Hi redfield,

...When I do an

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answer imageNames[11]

the result is something like []PNG and under it another [].

yes, that is how BINARY data look in a (text!) field!
Remember:

put url("BINfile:" & varImage) into imageNames[11]

So THAT was your problem in the end?
Did not get this at first read...


Best

Klaus

[Klaus]

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put "/home/Documents/Pics/someImage.png" into varImage
## put url("binfile:" & varImage) into imageNames[11]
set the filename of img "theImage" to imageNames[11]
set the location of image ""theImage" to 100,100

Will work for the filename, IF you comment out line 2!

[redfield]

Thank you so much for your suggestions party people! I tried them but:

This doesn't work, I get "no such object" - also after commenting out the third line:

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put "someImage.png" into imageNames[11]
put "/home/Documents/Pics/someImage.png" into varImage
put url("binfile:" & varImage) into imageNames[11]
set the filename of img "theImage" to imageNames[11] // no such object
set the location of image ""theImage" to 100,100

This also doesn't work, same error:

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put "/home/Documents/Pics/someImage.png" into varImage
put varImage into imageNames[11]
set the text of image "theImage" to imageNames[11] // no such object

This gives no error, but it doesn't display the image:

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put url("binfile:/home/Documents/Pics/someImage.png") into imageNames[11]
put imageNames[11] into img1 

@Klaus: you asked for a screenshot. You mean of the card? It's only an empty card with a button on it. Or do you mean a screenshot of the script editor?

[redfield]

Damn it! When I add

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set the location of image img1 to 100,100

after

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put url("binfile:/home/Documents/Pics/someImage.png") into imageNames[11]
put imageNames[11] into img1 

I get the "no such object" error again

[SparkOut]

You're mixing and matching a lot of the different possible combinations and methods referred to, with errors resulting:

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put "someImage.png" into imageNames[11] -- this is the name of the file only, no path and no data
 -- correction: not necessary here - if you commented out the 3rd line of your script above, then the filename alone will not help without the path too
 
put "/home/Documents/Pics/someImage.png" into varImage -- this is the path, and use varImage as the path if you want to set the filename
-- correction: change to use:
set the filename of img "theImage" to varImage

-- ******** OR ********

put url("binfile:" & varImage) into imageNames[11] -- this is the binary data
set the filename of img "theImage" to imageNames[11] // no such object -- because you are using the binary data you read in the line above
-- correction: change to use:
set the text of image "theImage" to imageNames[11]
-- or
put imageNames[11] into image "theImage" 


set the location of image ""theImage" to 100,100

For

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put url("binfile:/home/Documents/Pics/someImage.png") into imageNames[11]
put imageNames[11] into img1 

I think you are mistaking Klaus' shorthand reference img 1 (the first image on the card) with img1 (a non-existent object name - which should be in quotes - and preceded by the object type, unless you do actually have a variable img1 which contains the correct full object reference)

[SparkOut]

Perhaps we could also take a step back and ask for some more detail about what you are trying to do - how do you want the interface to look and what actions you want to change the view of images and what the application is for - how are you planning on packaging and delivering the different images?

More info about what you want to achieve will help to show you a technique that will be more useful in the given scenario than trying to mix and match snippets and lines of code

[Klaus]

What SparkOut said!

"no such object" means there is no object (image) with the name you wrote in your script:

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...
put "/home/Documents/Pics/someImage.png" into varImage
put url("binfile:" & varImage) into imageNames[11]

## ALWAYS, yes, ALWAYS use quotes around names!
## ALWAYS! 
## The engine is less forgiving (with "sloppy" code) with every new version!
set the text of image "theImage" to imageNames[11] // no such object
set the location of image "theImage" to 100,100
## Did I mention ALWAYS! :-D
...

requires that you have an image object on the card named "img1".

And as SparkOut wrote, I was referring to the single image (= image 1) on the card of my test stack.
And I was asking for a screenshot because I did not understand your problem at first.

So your first code is definitively correct, however it requires an image object on the card named "theImage" or you get "no such object":

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...
put "/home/Documents/Pics/someImage.png" into varImage
put url("binfile:" & varImage) into imageNames[11]
put imageNames[11] into img "theImage"
set the location of image ""theImage" to 100,100
...

And now that you know how BINARY data look in a TEXT field, this should not surprise you anymore.

[Klaus]

I can highly recommend these stacks learn more about the basics of LC:
http://www.hyperactivesw.com/revscriptc ... ences.html

[redfield]

I am dying here of embarrassment and you're both right, I'm mixing up everything and misunderstood the "img1" thing from Klaus's code too . And I still don't get it to work :

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put "/home/Documents/Pics/someImage.png" into varImage 
put url("binfile:" & varImage) into imageNames[11]
put imageNames[11] into img "theImage"
set the location of image "theImage" to 100,100

Does this not create the object needed?

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put imageNames[11] into img "theImage"

In the long term the goal is a simple Memory game. For now the goal is only to display an image on the screen (card). I am assuming I don't need to do an "Import As Control" -> "Image File", to first add the image to the stack, because there is a file path involved in the code (-> put "/home/Documents/Pics/someImage.png") ...

[richmond62]

No object will be created by your code, you need to set up a blank image on your stack:
-

-
then give it your name "theImage" via the properties palette:
-

[Klaus]

Hi redfield,

Does this not create the object needed?

no, as I tried to tell you already with e.g. "... requires that you have an image object on the card named "img1"."

In the long term the goal is a simple Memory game.

I have an old, but well commented example of a memory game on my webpage: https://major-k.de/xtalk.html
Scroll down to "simple_memory1" Yoj may want to change the file suffix from .mc to .livecode if you prefer doubleclicking documents.

I am assuming I don't need to do an "Import As Control" -> "Image File", to first add the image to the stack, because there is a file path involved in the code (-> put "/home/Documents/Pics/someImage.png") ...

No, when you do "Import as control" LC does this behind the scenes:
1. Creates a new and empty IMAGE object as Richmond showed you in the last post
2. Put the BINARY data of the image INTO that so far EMPTY image object.

So doing this "by hand/script" always requires step 1 before either
-> set the filename of img...
Or
-> put url("binfile:...) into img X

Best

Klaus