distributing differnet elements horizontally inside a div with CSS - html

Question

Here's the jsFiddle
Suppose I have the following HTML:
<div class="Trigger">click here</div>
<div id="TheContainer">
<div class="One">this is some text</div>
<input type="button" class="Two" value="button 1" />
<input type="button" class="Three" value="button 2" />
</div>
and the following CSS:
#TheContainer{
width:500px;
height:40px;
padding:10px 30px;
display:none;
background:red;}
.One{float:left;}
.Two{float:left;}
.Three{float:left;}
I use the following javascript to show/hide the container:
$(document).ready(function () {
$('.Trigger').click(function () {
var TheContainer = $('#TheContainer');
if (TheContainer.is(':visible') === false) {
TheContainer.show();
} else {
TheContainer.hide();
}
});
});
As you can see, we have a container of fixed width that's hidden, and that contains 3 elements: 1 div and 2 buttons, all 3 of variable sizes because the text of these elements changes at runtime.
I'm looking to horizontally distribute the 3 children elements evenly inside the container. I've looked around and for various reasons, none of the existing solutions seem to work for this particular case.
How can I distribute these elements horizontally and evenly using just CSS?
Note: I know I can do it in jQuery by calculating widths and then setting positions absolutely but I'm looking to see if there's a CSS only solution.
Thanks

Answer 1

I believe this is what you're looking for: http://jsfiddle.net/gq8s4/5/
It involves creating a div around each button so the buttons themselves are not really wide.
<div id="button1"><input type="button" class="Two" value="button 1" /></div>

Answer 2

EDIT: Adjusted answer to new details.
http://jsfiddle.net/gq8s4/3/
.triple-container {
float: left;
width: 33.333333%;
text-align: center;
border: 1px solid yellow;
box-sizing: border-box;
}
.One{
text-align: center;
width: 60px;
margin: 0 auto;
}
.Two{
width: 20px;
}
.Three{
width: 20px;
}

Answer 3

Flexbox is about as close as you're going to get.
http://tinker.io/eb980
#TheContainer {
display: -webkit-box;
display: -moz-box;
display: -ms-flexbox;
display: -webkit-flex;
display: flex;
-webkit-box-pack: justify;
-moz-box-pack: justify;
-ms-flex-pack: justify;
-webkit-justify-content: space-between;
justify-content: space-between;
width: 100%; /* for old Firefox */
}
Support: Firefox, Safari, Chrome, Opera, IE10. http://caniuse.com/flexbox
If you're comfortable adding extra markup, you could fake this with display: table-cell but it won't be perfect:
http://tinker.io/eb980/2
#TheContainer {
width: 100%;
display: table;
}
div {
display: table-cell;
width: 33%;
}
div:nth-child(2) {
text-align: center;
}
div:last-child {
text-align: right;
}
<div id="TheContainer">
<div class="One">this is some text</div>
<div><input type="button" class="Two" value="button 1" /></div>
<div><input type="button" class="Three" value="button 2" /></div>
</div>