Loading images from a non-URL source
Björnke von Gierke
bvg at mac.com
Wed Jul 21 12:16:00 CDT 2004
this works for me:
answer file ""
if the result = "" then
set the data of me to URL ("binfile:" & it)
put the Data of me into image 1
On Jul 21 2004, at 15:25, Frank D. Engel, Jr. wrote:
> So then something like this attached to a button should work? It
> doesn't seem to. I select a JPEG image file (I tried several
> different ones).
> on mouseUp
> answer file "Select an image file:" as sheet
> put it into x
> if there is a file x then
> open file x
> read from file x until EOF
> put it into y
> close file x
> set the text of image "Logo" to y
> end if
> end mouseUp
> If I set the filename of image "Logo" to x, then the image appears,
> but I need to be able to take the data from a database field (and to
> take image data from a file and store it in the field), so I need
> functionality similar to the above.
> What am I missing here?
> On Jul 20, 2004, at 18:00, Jeanne A. E. DeVoto wrote:
>> At 10:51 PM +0200 7/20/2004, Klaus Major wrote:
>>> Hi Frank,
>>>> How can I take binary image data stored in a variable (obtained
>>>> usually from a database query) and display it in an image field
>>>> without first storing
>>>> it to a file? I can't seem to find any information on this.
>>>> I tried this, but it doesn't seem to work:
>>>> set the fileName of image "Logo" to empty
>>>> set the imageData of image "Logo" to an_obtained_value
>>> when using "the imagedata" you have to make sure that the "target"
>>> image has EXACTLY
>>> the same dimensions as the "source" image, or you might expereince
>>> ugly results...
>>> But you can:
>>> put a_var_with_binary_data into img 1
>>> and it will resize to the correct dimensions :-)
>> It's also important to know that imageData and the content of an
>> image (its text property) aren't in the same format.
>> The imageData is an invariant format that provides the RGB data for
>> each pixel. The text of the image is the image's data in whatever
>> format - PNG, GIF, JPEG, or whatever format the image is encoded in.
>> Normally, if you get the data from some other source, it will be in
>> PNG, GIF, etc., so you'll use a statement like
>> put myImageData into image "My Image"
>> Only if you're modifying the image data yourself do you use the
>> imageData, usually.
>> jeanne a. e. devoto ~ revolution at jaedworks.com
>> use-revolution mailing list
>> use-revolution at lists.runrev.com
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