Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>The effect you're looking for is a little tricky to achieve, but it can be done, even without a wrapper element.</p> <p>The main issue here is that elements naturally render top-down, not bottom-up. Animating both the <code>top</code> and <code>height</code> CSS properties of a relatively-positioned element allows us to implement a slide-up effect, but the element will still render top-down:</p> <pre><code>+-------------------------------------------+ | | ^ | | | Hidden area collapses upwards. | | | +-------------------------------------------+ &lt;-- 'top' | | ^ | | Upper part of element (visible). | | | | | | Animation goes bottom-up. | | Element still renders top-down. | | | | | | +--|----------------------------------------+ &lt;-- 'top + height' | | | | | | Lower part of element (hidden). | | | V | | +-------------------------------------------+ </code></pre> <p>If we want to simulate bottom-up rendering, we have to modify the <a href="https://developer.mozilla.org/en/DOM/element.scrollTop" rel="noreferrer">scrollTop</a> property of the element during the animation, in order for its lower part to always remain in view:</p> <pre><code>+-------------------------------------------+ | | ^ | | Upper part of element (hidden). | | Hidden area collapses upwards. | | | | +--|----------------------------------------+ &lt;-- 'top' and 'scrollTop' | | | ^ | | Element still renders top-down. | | | | | | Animation goes bottom-up. | | Lower part of element (visible). | | | V | | +-------------------------------------------+ &lt;-- 'top + height' </code></pre> <p>We can use <a href="http://api.jquery.com/animate/" rel="noreferrer">animate()</a> with <code>scrollTop</code>, but doing so in conjunction with <code>top</code> and <code>height</code> did not work correctly in my tests (I suspect <code>scrollTop</code> is reset when <code>top</code> or <code>height</code> are modified in the first animation step, so it ends up stuck to <code>0</code>).</p> <p>To work around this, we can handle <code>scrollTop</code> ourselves through the optional <a href="http://api.jquery.com/animate/#step" rel="noreferrer">step</a> function we can pass to <code>animate()</code>. This function is called with two arguments, <code>now</code> and <code>fx</code>, <code>now</code> being the current value of the animated property and <code>fx</code> being a wrapper object around useful information, like the element and property being animated.</p> <p>Since we always want <code>scrollTop</code> to be the same as <code>top</code>, we only have to test if <code>top</code> is being animated in our <code>step</code> function. If it is, we set <code>scrollTop</code> to <code>now</code>. This solution gives acceptable results, although it flickers a little too much for my taste (that might be an artifact of my browser, though).</p> <p>So, in summary, to implement that effect, we have to:</p> <ul> <li>Fetch the element's original height,</li> <li>Make the element <code>position: relative;</code> so we can animate its <code>top</code> property,</li> <li>Collapse the element by setting <code>top</code> to the original height and <code>height</code> to <code>0</code>,</li> <li>Show the element (necessary in your fiddle since <code>display: none;</code> is applied),</li> <li>Animate <code>top</code> to <code>0</code> and <code>height</code> to the original height,</li> <li>Give <code>scrollTop</code> the value of <code>top</code> on each animation step.</li> </ul> <p>Resulting in the following code:</p> <pre><code>$("#click").click(function() { var $revealMe = $("#revealMe"); var originalHeight = $revealMe.height(); $revealMe.css({ position: "relative", top: originalHeight, height: 0 }).show().animate({ top: 0, height: originalHeight }, { duration: 1000, step: function(now, fx) { if (fx.prop == "top") { $(fx.elem).scrollTop(now); } } }); }); </code></pre> <p>You can test it in <a href="http://jsfiddle.net/gBY8V/1/" rel="noreferrer">this fiddle</a>.</p>
    singulars
    1. This table or related slice is empty.
    1. POjQuery UI blind effect - reveal from bottom
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USFrédéric Hamidi
    1. USFrédéric Hamidi
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POjQuery UI blind effect - reveal from bottom
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COFrederic, Wow, thankyou for such a detailed, and beautifully crafted response! From what I can see, and from some quick tests, this seems to do work fine. Tricky, yes, but I understand why now. Thankyou :)
      singulars
      1. PO
      1. USronnie burns
    2. COHi guys, I stumbled upon your solution here, it is really a very detailed response and really helpful. I didn't like the flickering that was going on so I took the liberty to edit your fiddle and I found a solution: [this fiddle](http://jsfiddle.net/gBY8V/153/) it is basically the decimal points on scroll top that aren't working well so I found a way to force rounded values. hope it helps!
      singulars
      1. PO
      1. USaberonni
    3. CO@aberonni, thank you for your comment, there is indeed no noticeable flicker :) I would suggest that you post your code in an answer and elaborate how your strategy operates (upvotes will come, no worries about that). Merry `$CHILDREN_RULE_HOLIDAY` :)
      singulars
      1. PO
      1. USFrédéric Hamidi
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload