Transition according to caption width - html

Question

I'm building an image overlay from right to left transition. The transition is working fine but the caption is 45% width of the image and I want the transition to stop at the end of caption width not continue till the end of image width.
This is my code
.screenshot {
float: left;
margin: 50px;
position: relative;
overflow: hidden;
}
.screenshot > * {
display: block;
}
.screenshot h3 {
margin: 8px;
padding: 0;
text-indent: 0;
text-align: right;
font: 21px/25px "TwCenMT";
text-transform: none;
text-decoration: none;
color: #fff;
letter-spacing: normal;
}
.screenshot-caption {
position: absolute;
width: 45%;
height: 100%;
background: rgb(93, 84, 77);
background: rgba(93, 84, 77, .7);
color: #ed4e6e;
-webkit-transition: all 0.5s ease-out;
-moz-transition: all 0.5s ease-out;
transition: all 0.5s ease-out;
}
.screenshot-caption h1 {
color: #fff;
}
.screenshot-caption a {
display: table;
margin: 0 auto;
bottom:0;
text-align: center;
background: #2c3e50;
padding: 6px 12px;
color: #000;
text-decoration: none;
}
.screenshot-caption > * {
-webkit-transition: opacity 1s ease;
-moz-transition: opacity 1s ease;
transition: opacity 1s ease;
opacity: 0;
}
.screenshot-caption_right {
top: 0;
left: 100%;
}
.screenshot:hover .screenshot-caption {
top: 0;
left: 0;
-webkit-transition: all 0.25s ease-out;
-moz-transition: all 0.25s ease-out;
transition: all 0.25s ease-out;
}
.screenshot:hover .screenshot-caption > * {
-webkit-transition: opacity 1s ease;
-moz-transition: opacity 1s ease;
transition: opacity 1s ease;
opacity: 1;
}
<div class="screenshot">
<img src="http://fillmurray.com/300/200">
<div class="screenshot-caption screenshot-caption_right">
<h1>Right to Left</h1>
Read More
</div>
</div>
http://jsfiddle.net/vhp2nL7k/
The transition should be 45% of the image according to caption width

Answer 1

As you want the transition to stop the end of caption, the absolute position of the caption at that time would be left = 100-(width of caption div)% = 55% in this case.
.screenshot {
float: left;
margin: 50px;
position: relative;
overflow: hidden;
}
.screenshot > * {
display: block;
}
.screenshot h3 {
margin: 8px;
padding: 0;
text-indent: 0;
text-align: right;
font: 21px/25px "TwCenMT";
text-transform: none;
text-decoration: none;
color: #fff;
letter-spacing: normal;
}
.screenshot-caption {
position: absolute;
width: 45%;
height: 100%;
background: rgb(93, 84, 77);
background: rgba(93, 84, 77, .7);
color: #ed4e6e;
-webkit-transition: all 0.5s ease-out;
-moz-transition: all 0.5s ease-out;
transition: all 0.5s ease-out;
}
.screenshot-caption h1 {
color: #fff;
}
.screenshot-caption a {
display: table;
margin: 0 auto;
bottom:0;
text-align: center;
background: #2c3e50;
padding: 6px 12px;
color: #000;
text-decoration: none;
}
.screenshot-caption > * {
-webkit-transition: opacity 1s ease;
-moz-transition: opacity 1s ease;
transition: opacity 1s ease;
opacity: 0;
}
.screenshot-caption_right {
top: 0;
left: 100%;
}
.screenshot:hover .screenshot-caption {
top: 0;
left: 55%;
-webkit-transition: all 0.25s ease-out;
-moz-transition: all 0.25s ease-out;
transition: all 0.25s ease-out;
}
.screenshot:hover .screenshot-caption > * {
-webkit-transition: opacity 1s ease;
-moz-transition: opacity 1s ease;
transition: opacity 1s ease;
opacity: 1;
}
<div class="screenshot">
<img src="http://fillmurray.com/300/200">
<div class="screenshot-caption screenshot-caption_right">
<h1>Right to Left</h1>
Read More
</div>
</div>