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Thumbnail fun

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    #1

    Thumbnail fun

    Donna Marie's letter raised the question in my own mind of how hard it would be to do a database with thumbnails. I put together the attached DB fairly quickly, with my only stumbling block being that while A5 transparently changes a loaded JPG to a BMP, you have to manually change the BMP back to a JPG when said BMP is being assigned to a field.

    There is a small glitch in this program, however, at least when I run it on this machine.

    If you load picture after picture, sometimes the on-form images won't change. Not always. Sometimes just the thumb changes. Sometimes just the fulli image changes. Sometimes neither change.

    The right data gets loaded into the table in every case.

    Any thoughts?
    Tags: None
    #2
    RE: Thumbnail fun

    Huh. It said the file got uploaded....

    Comment

      #3
      RE: Thumbnail fun

      Only one record has any images in your table.
      Peter
      AlphaBase Solutions, LLC

       [email protected]
      https://www.alphabasesolutions.com

      Comment

        #4
        RE: Thumbnail fun

        Blake,

        I put together a quick thumbnail/photo database for Donna from some stuff I picked up here on the board, and some stuff I have on a search form in my database. It uses as an example the imagefile reference field.

        The script that loads the big pic is well documented, and explains a few things well so it should be easy to understand. I don't remember who wrote it.

        To use, unzip into a seperate directory and then open the pictures form, select a search type, enter something in the search box ( a, the, will, or etc.) and click search. The results returned are then displayed. The show all button will show all records in record number order and bring you back to the first record. Click the Big Pic button to see the big picture.

        Thumbnails in the directory are prefixed by TN_

        The PicturesView form uses a hotspot over the thumbnail, but otherwise works the same.

        All scripts are on the buttons, or the form.

        Like I said it is really quick and dirty, and I'm sure many people could improve on some of the code, but it works.

        Phil DeGruy

        Comment

          #5
          RE: Thumbnail fun

          Phil

          I think this is the thread where that concept was initially presented. There is a good discussion of the issues and concepts or using images and thumbnails.

          http://msgboard.alphasoftware.com/alphaphorum/read.php3?sortby=lastreply&direction=desc&num=11&id=40005&thread=32436#MSG32436

          Jerry

          Comment

            #6
            RE: Thumbnail fun

            Jerry,

            Yes, you are correct with the link. Thanks also for posting the bigger picture script. I couldn't remember where I had found the script.

            Phil

            Comment

              #7
              RE: Thumbnail fun

              1. Open up the form.
              2. Click on the button.
              3. Load an image.
              4. a. The big image will update.
              b. The little image will update.
              5. Go to step 3 (but use a different image). Eventually either 4a or 4b (or both) wilL NOT occur. I.e., eventually, either the big image or the thumbnail will retain the PREVIOUS picture.

              Happens on both my work machines here.

              Comment

                #8
                RE: Thumbnail fun

                Good links.

                Can anyone confirm the issue I'm having with the database I uploaded? The code is straightforward enough, but if the record already has data in it the image on the form doesn't always update. (The table is updated correctly, just not the form.)

                sourceFileName = ui_get_file("Pick a JPEG to load.", "JPEGS (*.jpg)", "", "X")
                source = file.to_blob(sourceFilename)
                ui_bitmap_load("source", source)
                ui_bitmap_create("dest", 1.3, 1.3)
                ui_bitmap_draw("dest", ""%code%
                bitmap("source", 0, 0, 1.3, 1.3, "stretch")
                %code%)
                dest = ui_bitmap_save("dest")

                tbl = table.current()
                tbl.change_begin()
                tbl.image = source
                tbl.thumb = bitmap_to_jpeg(dest)
                tbl.change_end()

                ui_bitmap_drop("source")
                ui_bitmap_drop("dest")

                parentform.refresh_fields() 'This should do it, I think
                parentform.Refresh_Layout() 'Added for paranoia

                Comment

                  #9
                  RE: Thumbnail fun

                  Blake

                  I didn't try your code, but it looks very good. However, since you made the change on a second instance of the table, you will need topparent.resynch() to see the new change. Instead of opening a new instance, why not use table.current() to get a pointer to the current open table and change the data actually shown on the form. Not a big difference, and either should work, but using existing open table is a little cleaner.

                  Jerry

                  Comment

                    #10
                    RE: Thumbnail fun

                    Duh, you are using table.current(). Don't know what I was looking at. But I would try resynch() anyway. I try to avoid it as much as possible, but there are times it is the best approach.

                    Jerry

                    Comment

                      #11
                      RE: Thumbnail fun

                      Thank you, Jerry!

                      Resynch did the trick.

                      Comment

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