问题
I'm an art photographer in my spare time, and I'm working on a new design for my web site (note: NSFW) using a great open-source slideshow library, JSSOR.
I want to fill the browser without changing the aspect ratio of the photos (i.e., center them as large as possible).
A $FillMode of 1 works beautifully for this, but I'm having trouble creating code to respond to browser resize/rotation.
Calculating the proper new height/width (browser minus footer text and a little margin) on resize is easy, but there appears to be no way to set the width and height programmatically after the slideshow has initialized. Am I missing something?
All of the responsive code I've seen for JSSOR (e.g., this answer) uses the $ScaleWidth() method. Unfortunately, that method attempts to maintain the aspect ratio of the slideshow canvas, while I want the slideshow canvas to stretch with the browser (while maintaining the aspect ration of the photo via the $FillMode=1 logic).
I dug into the code for $ScaleWidth(), but there's some weird DOM-voodoo in there, so I haven't figured out how to create a my own method to force-resize to a particular width and height.
Ideas?
回答1:
Scripts
<!-- it works the same with all jquery version from 1.x to 2.x -->
<script type="text/javascript" src="../js/jquery-1.9.1.min.js"></script>
<!-- use jssor.slider.mini.js (39KB) or jssor.sliderc.mini.js (31KB, with caption, no slideshow) or jssor.sliders.mini.js (26KB, no caption, no slideshow) instead for release -->
<!-- jssor.slider.mini.js = jssor.sliderc.mini.js = jssor.sliders.mini.js = (jssor.core.js + jssor.utils.js + jssor.slider.js) -->
<script type="text/javascript" src="../js/jssor.core.js"></script>
<script type="text/javascript" src="../js/jssor.utils.js"></script>
<script type="text/javascript" src="../js/jssor.slider.js"></script>
<script>
jQuery(document).ready(function ($) {
var _SlideshowTransitions = [
//Fade
{ $Duration: 700, $Opacity: 2, $Brother: { $Duration: 1000, $Opacity: 2 } }
];
var options = {
$FillMode: 1, //[Optional] The way to fill image in slide, 0 stretch, 1 contain (keep aspect ratio and put all inside slide), 2 cover (keep aspect ratio and cover whole slide), 4 actual size, 5 contain for large image, actual size for small image, default value is 0
$SlideDuration: 800, //[Optional] Specifies default duration (swipe) for slide in milliseconds, default value is 500
$DragOrientation: 3, //[Optional] Orientation to drag slide, 0 no drag, 1 horizental, 2 vertical, 3 either, default value is 1 (Note that the $DragOrientation should be the same as $PlayOrientation when $DisplayPieces is greater than 1, or parking position is not 0)
$AutoPlay: true, //[Optional] Whether to auto play, to enable slideshow, this option must be set to true, default value is false
$AutoPlayInterval: 1500, //[Optional] Interval (in milliseconds) to go for next slide since the previous stopped if the slider is auto playing, default value is 3000
$SlideshowOptions: { //[Optional] Options to specify and enable slideshow or not
$Class: $JssorSlideshowRunner$, //[Required] Class to create instance of slideshow
$Transitions: _SlideshowTransitions, //[Required] An array of slideshow transitions to play slideshow
$TransitionsOrder: 1, //[Optional] The way to choose transition to play slide, 1 Sequence, 0 Random
$ShowLink: true //[Optional] Whether to bring slide link on top of the slider when slideshow is running, default value is false
},
$ArrowNavigatorOptions: { //[Optional] Options to specify and enable arrow navigator or not
$Class: $JssorArrowNavigator$, //[Requried] Class to create arrow navigator instance
$ChanceToShow: 2, //[Required] 0 Never, 1 Mouse Over, 2 Always
$AutoCenter: 2, //[Optional] Auto center arrows in parent container, 0 No, 1 Horizontal, 2 Vertical, 3 Both, default value is 0
$Steps: 1 //[Optional] Steps to go for each navigation request, default value is 1
}
};
var jssor_slider1 = new $JssorSlider$("slider1_container", options);
//responsive code begin
//you can remove responsive code if you don't want the slider scales while window resizes
function ScaleSlider() {
var windowWidth = $(window).width();
if (windowWidth) {
var windowHeight = $(window).height();
var originalWidth = jssor_slider1.$OriginalWidth();
var originalHeight = jssor_slider1.$OriginalHeight();
var scaleWidth = windowWidth;
if (originalWidth / windowWidth < originalHeight / windowHeight) {
scaleWidth = Math.ceil(windowHeight / originalHeight * originalWidth);
}
jssor_slider1.$ScaleWidth(scaleWidth);
}
else
window.setTimeout(ScaleSlider, 30);
}
ScaleSlider();
$(window).bind("load", ScaleSlider);
$(window).bind("resize", ScaleSlider);
$(window).bind("orientationchange", ScaleSlider);
//responsive code end
});
</script>
html
<div style="position: relative; width: 100%; overflow: hidden;">
<div style="position: relative; left: 50%; width: 5000px; text-align: center; margin-left: -2500px;">
<!-- Jssor Slider Begin -->
<!-- You can move inline styles to css file or css block. -->
<div id="slider1_container" style="position: relative; margin: 0 auto; top: 0px; left: 0px; width: 1000px; height: 1000px;">
<!-- Slides Container -->
<div u="slides" style="cursor: move; position: relative; left: 0px; top: 0px; width: 1000px; height: 1000px; overflow: hidden; ">
<div><img u="image" src="tallent/web-2012-01-29-183109.jpg" /></div>
<div><img u="image" src="tallent/web-2014-04-01-104205.jpg" /></div>
<div><img u="image" src="tallent/test-wide.jpg" /></div>
<div><img u="image" src="tallent/web-2012-02-04-123703.jpg" /></div>
<div><img u="image" src="tallent/web-2012-06-02-083648.jpg" /></div>
<div><img u="image" src="tallent/web-2014-04-01-093103.jpg" /></div>
<div><img u="image" src="tallent/web-2013-11-20-131902.jpg" /></div>
<div><img u="image" src="tallent/web-2013-06-30-184152.jpg" /></div>
<div><img u="image" src="tallent/web-2013-04-19-163938.jpg" /></div>
<div><img u="image" src="tallent/web-2013-03-10-084125.jpg" /></div>
</div>
<!-- Arrow Navigator Skin Begin -->
<style>
/* jssor slider arrow navigator skin 03 css */
/*
.jssora03l (normal)
.jssora03r (normal)
.jssora03l:hover (normal mouseover)
.jssora03r:hover (normal mouseover)
.jssora03ldn (mousedown)
.jssora03rdn (mousedown)
*/
.jssora03l, .jssora03r, .jssora03ldn, .jssora03rdn {
position: absolute;
cursor: pointer;
display: block;
background: url(../img/a03.png) no-repeat;
overflow: hidden;
}
.jssora03l {
background-position: -3px -33px;
}
.jssora03r {
background-position: -63px -33px;
}
.jssora03l:hover {
background-position: -123px -33px;
}
.jssora03r:hover {
background-position: -183px -33px;
}
.jssora03ldn {
background-position: -243px -33px;
}
.jssora03rdn {
background-position: -303px -33px;
}
</style>
<!-- Arrow Left -->
<span u="arrowleft" class="jssora03l" style="width: 55px; height: 55px; top: 123px; left: 8px;">
</span>
<!-- Arrow Right -->
<span u="arrowright" class="jssora03r" style="width: 55px; height: 55px; top: 123px; right: 8px">
</span>
<!-- Arrow Navigator Skin End -->
</div>
</div>
</div>
回答2:
For anyone who comes looking for $ResizeCanvas. They've finally added a function that can help get the required slider size with $ScaleSize.
For the latest version 25.2.0, we added a new method $ScaleSize(width, height) instead of $ResizeCanvas.
来源：https://stackoverflow.com/questions/24472909/how-can-i-make-jssor-change-its-aspect-ratio