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centerMode option added #763

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7ef4cb8
centerMode functionality added
Jun 4, 2019
ee17504
CenterMode: fixed width slides, first slide left align
Jun 11, 2019
d15774d
updated readme.md and default.js
Jun 11, 2019
80122c8
updated html documentation for centerMode option
Jun 12, 2019
ce96028
updated code to make actual centerMode effect, earlier it was first s…
Jun 13, 2019
987adbf
added an option to make first slide left align with centerMode effect
Jun 13, 2019
af595f2
fixed maxOffset calculation to avoid extra clicking on next-prev
Jun 14, 2019
c3c17c1
refactoring code
Jun 14, 2019
1e3857d
code refactor and review comments fix suggested by Allan
Nov 8, 2019
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5 changes: 5 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -320,6 +320,11 @@ li {
<td>class name for slider next control then disabled</td>
<td>default: 'disabled'</td>
</tr>
<tr>
<td>centerMode</td>
<td>enable centerMode with an additional option to make first slide left align (do not combine with infinite, centerMode will work with variable width slides too)</td>
<td>default: {enableCenterMode: false, firstSlideLeftAlign: false}</td>
</tr>
</table>

## Events
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9 changes: 8 additions & 1 deletion src/defaults.js
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Original file line number Diff line number Diff line change
Expand Up @@ -97,5 +97,12 @@ export default {
* If false, slides lory to the first slide on window resize.
* @rewindOnResize {boolean}
*/
rewindOnResize: true
rewindOnResize: true,

/**
* enable centerMode functionality by setting enableCenterMode as true
* by setting enableCenterMode and firstSlideLeftAlign as true makes first slide left align with centerMode functionality
* @centerMode {object}
*/
centerMode: {enableCenterMode: false, firstSlideLeftAlign: false}
};
93 changes: 93 additions & 0 deletions src/index.html
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Expand Up @@ -362,6 +362,82 @@ <h2>Variable width</h2>
});
});

</code></pre></div>

<h2>Center Mode</h2>

<div class="slider js_centermode centermode">
<div class="frame js_frame">
<ul class="slides js_slides">
<li class="js_slide" style="width: 220px;">220</li>
<li class="js_slide" style="width: 190px;">190</li>
<li class="js_slide" style="width: 150px;">150</li>
<li class="js_slide" style="width: 130px;">130</li>
<li class="js_slide" style="width: 250px;">250</li>
<li class="js_slide" style="width: 180px;">180</li>
<li class="js_slide" style="width: 200px;">200</li>
<li class="js_slide" style="width: 140px;">140</li>
<li class="js_slide" style="width: 120px;">120</li>
<li class="js_slide" style="width: 240px;">240</li>
</ul>
</div>

<span class="js_prev prev">
<svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" viewBox="0 0 501.5 501.5"><g><path fill="#2E435A" d="M302.67 90.877l55.77 55.508L254.575 250.75 358.44 355.116l-55.77 55.506L143.56 250.75z"/></g></svg>
</span>

<span class="js_next next">
<svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" viewBox="0 0 501.5 501.5"><g><path fill="#2E435A" d="M199.33 410.622l-55.77-55.508L247.425 250.75 143.56 146.384l55.77-55.507L358.44 250.75z"/></g></svg>
</span>
</div>

<div class="examplecode"><pre><code class="javascript">
document.addEventListener('DOMContentLoaded', function () {
var centerModeSlides = document.querySelector('.js_centermode');

lory(centerModeSlides, {
centerMode: { enableCenterMode: true }
});
});

</code></pre></div>

<h2>Center Mode - First Slide Left Align</h2>

<div class="slider js_centermode_leftalign centermode">
<div class="frame js_frame">
<ul class="slides js_slides">
<li class="js_slide">1</li>
<li class="js_slide">2</li>
<li class="js_slide">3</li>
<li class="js_slide">4</li>
<li class="js_slide">5</li>
<li class="js_slide">6</li>
<li class="js_slide">7</li>
<li class="js_slide">8</li>
<li class="js_slide">9</li>
<li class="js_slide">10</li>
</ul>
</div>

<span class="js_prev prev">
<svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" viewBox="0 0 501.5 501.5"><g><path fill="#2E435A" d="M302.67 90.877l55.77 55.508L254.575 250.75 358.44 355.116l-55.77 55.506L143.56 250.75z"/></g></svg>
</span>

<span class="js_next next">
<svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" viewBox="0 0 501.5 501.5"><g><path fill="#2E435A" d="M199.33 410.622l-55.77-55.508L247.425 250.75 143.56 146.384l55.77-55.507L358.44 250.75z"/></g></svg>
</span>
</div>

<div class="examplecode"><pre><code class="javascript">
document.addEventListener('DOMContentLoaded', function () {
var centerModeFirstSlideLeftAlign = document.querySelector('.js_centermode');

lory(centerModeFirstSlideLeftAlign, {
centerMode: { enableCenterMode: true, firstSlideLeftAlign: true }
});
});

</code></pre></div>

<h2>Multiple slides to scroll</h2>
Expand Down Expand Up @@ -725,6 +801,11 @@ <h2>Options</h2>
<td>class name for slider next control</td>
<td>default: 'js_next'</td>
</tr>
<tr>
<th>centerMode</th>
<td>enable centerMode with an additional option to make first slide left align (do not combine with infinite, centerMode will work with variable width slides too)</td>
<td>default: {enableCenterMode: false, firstSlideLeftAlign: false}</td>
</tr>
</table>
</section>

Expand Down Expand Up @@ -801,6 +882,8 @@ <h2>Events</h2>
var multiSlides = document.querySelector('.js_multislides');
var ease = document.querySelector('.js_ease');
var events = document.querySelector('.js_events');
var centerModeSlides = document.querySelector('.js_centermode');
var centerModeFirstSlideLeftAlign = document.querySelector('.js_centermode_leftalign');

lory(simple, {
infinite: 1,
Expand Down Expand Up @@ -865,6 +948,16 @@ <h2>Events</h2>
enableMouseEvents: true
});

lory(centerModeSlides, {
centerMode: { enableCenterMode: true },
enableMouseEvents: true
});

lory(centerModeFirstSlideLeftAlign, {
centerMode: { enableCenterMode: true, firstSlideLeftAlign: true },
enableMouseEvents: true
});

lory(multiSlides, {
infinite: 4,
slidesToScroll: 4,
Expand Down
20 changes: 16 additions & 4 deletions src/lory.js
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Expand Up @@ -136,9 +136,10 @@ export function lory (slider, opts) {
} = options;

let duration = slideSpeed;
let nextOffset;

const nextSlide = direction ? index + 1 : index - 1;
const maxOffset = Math.round(slidesWidth - frameWidth);
const maxOffset = Math.round(slidesWidth - ((options.centerMode.enableCenterMode) ? slides[0].clientWidth / 2 : frameWidth));

dispatchSliderEvent('before', 'slide', {
index,
Expand Down Expand Up @@ -182,7 +183,15 @@ export function lory (slider, opts) {
duration = rewindSpeed;
}

let nextOffset = Math.min(Math.max(slides[nextIndex].offsetLeft * -1, maxOffset * -1), 0);
/**
* if centerMode enabled, then offset is set center of frame/container
*/
if (options.centerMode.enableCenterMode) {
nextOffset = Math.max((slides[nextIndex].offsetLeft * -1) + (frameWidth / 2) - (slides[nextIndex].clientWidth / 2), maxOffset * -1);
nextOffset = (nextOffset >= 0 && options.centerMode.firstSlideLeftAlign) ? 0 : nextOffset;
} else {
nextOffset = Math.min(Math.max(slides[nextIndex].offsetLeft * -1, maxOffset * -1), 0);
}

if (rewind && Math.abs(position.x) === maxOffset && direction) {
nextOffset = 0;
Expand Down Expand Up @@ -344,9 +353,12 @@ export function lory (slider, opts) {

index = index + infinite;
position.x = slides[index].offsetLeft * -1;
} else {
} else if (options.centerMode.enableCenterMode && !options.centerMode.firstSlideLeftAlign) {
translate((slides[index].offsetLeft * -1) + (frameWidth / 2) - (slides[index].clientWidth / 2), rewindSpeed, ease);
position.x = (slides[index].offsetLeft * -1) + (frameWidth / 2) - (slides[index].clientWidth / 2);
} else {
translate(slides[index].offsetLeft * -1, rewindSpeed, ease);
position.x = slides[index].offsetLeft * -1;
position.x = slides[index].offsetLeft * -1;
}

if (classNameActiveSlide) {
Expand Down
5 changes: 5 additions & 0 deletions static/app.css
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Expand Up @@ -252,6 +252,11 @@ footer {
margin-right: 10px;
}

.centermode li {
width: 340px;
margin-right: 10px;
}

.simple > .frame li:last-child,
.rewind > .frame li:last-child,
.events > .frame li:last-child,
Expand Down