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Setting links to activate the lightbox feature

From: Create an Interactive Photo Gallery with jQuery and Dreamweaver

Video: Setting links to activate the lightbox feature

Now, when we are inside of our gallery, when we hit Reload in the browser, one thing you'll notice is that we don't have a default image to show up here. The preview is only getting populated and faded in once we click on an image. Also, whatever image would show up also needs to have its thumbnail replaced. Now, the way we've written our script so far, the update thumbnails is actually part of the clickevent for all the anchor tags. So if I switch over to our JavaScript statement, we're going to scroll up here.

Setting links to activate the lightbox feature

Now, when we are inside of our gallery, when we hit Reload in the browser, one thing you'll notice is that we don't have a default image to show up here. The preview is only getting populated and faded in once we click on an image. Also, whatever image would show up also needs to have its thumbnail replaced. Now, the way we've written our script so far, the update thumbnails is actually part of the clickevent for all the anchor tags. So if I switch over to our JavaScript statement, we're going to scroll up here.

We actually set this with these statements here, but again, they're inside the clickevent. In order to run these by themselves, we're going to put the thumbnail updater in its own function as well. So I'm going to come up here and I'm going to put two forward slashes in front of all of these statements. We're going to comment those out. Down here, lower in the page, we're going to create another custom function. I'm going to type function updateThumbnails, beginning and ending parentheses, beginning and ending bracket. Then we're going to just split this open.

Inside updateThumbnails, what we're going to do is we're going to actually test the state of the thumbnails. Since we're no longer in the click event, we lose the actual event that we were using before to assign the classes. So, what we're going to have to do is cycle through all the anchor tags first and then check to see which anchor tags match the preview image that's showing up. So to begin this, let's start with a Dollar sign, beginning and ending parentheses, string literal, gallery_thumbnails, space, a. I'm going to come outside of that, .each, beginning and ending parentheses, semicolon.

Inside of each, we're going to type function, beginning and ending parentheses, beginning and ending bracket. Now when we run the update function, the jQuery statement is going to run through every one of the anchor tags. And what we want to do is test the equality of the preview area to the actual anchor tag that's being tested. So we're going to type if, beginning and ending parentheses, beginning and ending bracket, and then we're going to split it.

Inside of the if statement, we're going to type a Dollar sign, string literal, .gallery_preview space a, .attr. beginning and ending parentheses, href. Two Equal signs, we're going to test the absolute equality of this statement and Dollar sign, this.attr, string literal inside of there, href.

So as we go through every one of the anchor tags, it's going to check the current one, which is the 'this' item and see if it matches what we wrote over into the gallery preview area. If they match, we're going to set jQuery statement; this, .addClass, string literal, 'selected'. On the next line, we want to fade out the child, the image tag that's inside of there.

this, children, beginning and ending parentheses. Actually, we're going to use fadeTo. We want to actually animate this down. Beginning and ending parentheses, semicolon. And then inside here we're going to say 250, so a quarter of a second, and then .4. That's going to be the transparency. Let me scroll down here a little bit.

Then we're going to type else, beginning and ending bracket. Let's open that up. Dollar sign, beginning and ending paretheses, this, .removeClass beginning and ending paretheses, string literal, selected, semicolon. Next line, this, .children, beginning and ending parentheses, .css beginning and ending parentheses, semicolon.

Inside here, one string literal, opacity, comma, another string literal, number 1. So this puts this in a completely separate function. Let's grab updateThumbnails. Let's copy that to the clipboard. Let's scroll up, and right after setFancyboxLinks, let's paste that function there as well. So basically, we have removed this functionality from being inside the click- event, and we moved it into its own function.

Now that we have the updateThumbnails out as separate function, this is going to allow us, in the next movie, to set up a statement that's going to autostart the gallery when the browser loads this.

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This video is part of

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  1. 7m 51s
    1. Previewing the project across browsers and devices
      5m 32s
    2. About the exercise files
      2m 19s
  2. 9m 49s
    1. Renaming a series of files in Adobe Bridge
      3m 7s
    2. Using GREP for more intricate file renaming
      6m 42s
  3. 29m 5s
    1. Creating and linking HTML and CSS files
      1m 32s
    2. Save For Web & Devices in Photoshop
      7m 2s
    3. Creating empty CSS rules
      3m 55s
    4. Create, nest, and class DIV tags
      6m 0s
    5. Adding CSS properties for main container
      4m 0s
    6. Adding CSS properties for content area
      4m 28s
    7. Adding CSS properties for headings
      2m 8s
  4. 15m 55s
    1. Adding and linking the thumbnail images
      2m 32s
    2. Styling the thumbnail links with CSS
      5m 15s
    3. Downloading and adding jQuery to your project
      2m 42s
    4. Overriding the browser's default link behavior
      5m 26s
  5. 11m 10s
    1. Creating preview images from anchor links
      1m 52s
    2. Changing the preview when clicking thumbnails
      5m 59s
    3. Changing the caption when clicking thumbnails
      3m 19s
  6. 12m 0s
    1. Adding an image preload plug-in for jQuery
      2m 22s
    2. Setting a dissolve transition between previews
      4m 31s
    3. Implementing the preload functionality
      5m 7s
  7. 15m 20s
    1. Adding a lightbox plug-in for jQuery
      2m 2s
    2. Creating a custom function for lightbox properties
      7m 38s
    3. Setting links to activate the lightbox feature
      5m 40s
  8. 3m 40s
    1. Initializing the gallery on page load
      3m 40s
  9. 5m 11s
    1. Adding icons and styles to the zoom and contact links
      5m 11s
  10. 2m 41s
    1. Activating a gallery automatically in IE9 and IE10
      2m 41s
  11. 2m 43s
    1. Some ideas for further enhancements
      2m 43s

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