jQuery 在模态对话框中淡入叠加

Fade in overlay in modal dialog

提问by Deniz Dogan

I have a JQuery UI dialog which is modal and has a black background with 50% opacity. Is it possible to make the background opacity fade from 0% to 50%? If so, how? Because currently it feels kind of like getting a punch straight to the face when a dialog is shown.

我有一个 JQuery UI 对话框，它是模态的，背景为黑色，不透明度为 50%。是否可以使背景不透明度从 0% 淡化到 50%？如果是这样，如何？因为目前感觉有点像在显示对话框时直接对着脸一拳。

FWIW, this is the CSS I'm using at the moment:

FWIW，这是我目前使用的 CSS：

.ui-widget-overlay {
    background: black;
    opacity: 0.5;
    filter: alpha(opacity = 50);
    position: absolute;
    top: 0;
    left: 0;
 }

采纳答案by sshow

You can use the jQuery fadeTo()function. More information can be found on the link below. http://docs.jquery.com/Effects/fadeTo#speedopacitycallback

您可以使用 jQueryfadeTo()函数。可以在下面的链接中找到更多信息。 http://docs.jquery.com/Effects/fadeTo#speedopacitycallback

回答by Sam Barnes

You could also add this to fadeIn the modal:

您还可以将此添加到模式中的淡入淡出：

$(loginForm).dialog({
        resizable: false,
        open: function(){
            $('.ui-widget-overlay').hide().fadeIn();
        },
        show: "fade",
        hide: "fade" 
});

Hope this helps :)

希望这可以帮助 ：）

回答by Luke

This is an expansion on Liam Potter's answer. His works great for the fade in, but doesn't handle the fade out. I found this the easiest way to make the background also fade back out:

这是 Liam Potter 答案的扩展。他的作品非常适合淡入，但不处理淡出。我发现这是使背景也淡出的最简单方法：

beforeClose: function(){
    $('.ui-widget-overlay:first')
        .clone()
        .appendTo('body')
        .show()
        .fadeOut(400, function(){ 
            $(this).remove(); 
        })
    ;
}

You can't do this in the "close" method because jQuery has already removed the '.ui-widget-overlay' container, however by cloning it to just do the fade you can sidestep their removal and still make use of all the default styles.

您不能在“关闭”方法中执行此操作，因为 jQuery 已经删除了 '.ui-widget-overlay' 容器，但是通过克隆它来执行淡入淡出，您可以避开它们的删除并仍然使用所有默认值样式。

回答by Liam Potter

I know this is an old question, but I came across it just now in a search, and feel I could help other people.

我知道这是一个老问题，但我刚刚在搜索中遇到了它，觉得我可以帮助其他人。

This could be improved I'm sure but this will fade in and out your overlay when using a jQuery UI dialog.

这可以改进我敢肯定，但是当使用 jQuery UI 对话框时，这会淡入和淡出您的叠加层。

open: function(){
    $('.ui-widget-overlay').hide().fadeIn();
},
beforeClose: function(){
    $('.ui-widget-overlay').remove();
    $("<div />", {
        'class':'ui-widget-overlay'
    }).css(
        {
            height: $("body").outerHeight(),
            width: $("body").outerWidth(),
            zIndex: 1001
        }
    ).appendTo("body").fadeOut(function(){
        $(this).remove();
    });
}

回答by pody

Just a minor improvement on Liam Potter's answer. If you want the overlay to be full-screen then you might change his code to use the $(document).height()and $(document).width()instead of the body, because the latter be measured smaller than the visible area.

只是对 Liam Potter 的回答略有改进。如果您希望覆盖全屏，那么您可能会更改他的代码以使用$(document).height()and$(document).width()而不是主体，因为后者的测量值小于可见区域。

open: function(){
    $('.ui-widget-overlay').hide().fadeIn();
},
beforeClose: function(){
    $('.ui-widget-overlay').remove();
    $("<div />", {
        'class':'ui-widget-overlay'
    }).css({
        height: $(document).height(),
        width: $(document).width(),
        zIndex: 1001
    }).appendTo("body").fadeOut(function(){
        $(this).remove();
    });
}

回答by bmurashin

You could create your own widget extending $.ui.dialog to add overlay show and hide animations with accurate configuration using option.

您可以创建自己的小部件扩展 $.ui.dialog 以使用选项添加覆盖显示和隐藏动画的准确配置。

Another lacking functionality to close dialog by click on overlay is also easily added:

另一个缺乏通过单击覆盖关闭对话框的功能也很容易添加：

in some file, say jquery-ui.fsrc.dialog.js:

在某个文件中，说 jquery-ui.fsrc.dialog.js：

(function( $, undefined ) {

$.widget('fsrc.fsrc_dialog', $.ui.dialog, {
open: function() {
    // some helpful vars
    var self = this,
        options = self.options;

    // call parent method - it will create overlay and save it in self.overlay variable
    var ret = $.ui.dialog.prototype.open.apply(this, arguments);

    if (options.showOverlay) {
        // immediately hide and animate overlay
        // kind a hack, but jquery ui developers left no better way
        self.overlay.$el.hide().show(options.showOverlay)
    }
    if (options.closeOnOverlay) {
        // close dialog on click on overlay
        self.overlay.$el.click(function() {
            self.close();
        })
    }
    return ret;
},
close: function(event) {
    var self = this,
        options = self.options;

    if (options.hideOverlay) {
        // save and unset self.overlay, so it will not be destroyed by parent function during animation
        var overlay = self.overlay
        self.overlay = null;
        overlay.$el.hide(options.hideOverlay, function() {
            // destroy overlay after animation as parent would do
            overlay.destroy();
        })
    }

    // call parent method
    var ret = $.ui.dialog.prototype.close.apply(this, arguments);
    return ret;
}
});

}(jQuery));

In page:

在页面：

<script src='/js/jquery-ui.fsrc.dialog.js' type='text/javascript'></script>
<script type="text/javascript">
<!--
    jQuery(document).ready(function(){
        jQuery('#show').click(function(){
            jQuery('#order_form_container').fsrc_dialog({
                modal: true,
                closeOnOverlay: true,
                show: {effect: "fade", duration: 500},
                showOverlay: {effect: "fade", duration: 500},
                hide: {effect: "fade", duration: 300},
                hideOverlay: {effect: "fade", duration: 300},
            });
        })
    })
-->
</script>`

I named namespace, widget and options to my favor.

我根据自己的喜好命名了命名空间、小部件和选项。

Tested jquery1.7.2, jquery-ui1.8.19, IE9, ff11, chrome18.0.1025.168m, opera11.61

测试jquery1.7.2、jquery-ui1.8.19、IE9、ff11、chrome18.0.1025.168m、opera11.61

回答by Moe Singh

I had to modify the answer from Sam Barnes to make it work (I also threw the dialog click function in a $(document).ready function):

我不得不修改 Sam Barnes 的答案以使其工作（我还在 $(document).ready 函数中抛出了对话框单击函数）：

<script type='text/javascript'>
  $(".dialog").click(function(){
    $('.ui-widget-overlay').hide().fadeIn();        
    $("div.dialog").dialog({
        resizable: false,
        close: function(){
            $('.ui-widget-overlay').hide();
        },
        show: "fade",
        hide: "fade" 
    });
    $(".ui-dialog").fadeIn();
    return false;
  });
  $(".ui-widget-overlay").click(function(){
    $(this).hide();
    $(".ui-dialog").hide();
  });
</script>
<style>
  .ui-widget-overlay {
    background: black;
    opacity: 0.5;
    filter: alpha(opacity = 50);
    position: absolute;
    top: 0;
    left: 0;
   }
</style>
<div class='ui-widget-overlay'></div>
<div class='dialog' title='Heading!'>Some Message!</div>

You can add the thing that hides on escape button press by adding:

您可以通过添加以下内容来添加在按下退出按钮时隐藏的内容：

$(document).keyup(function(e) {

  if (e.keyCode == 27) { 
       $(".ui-dialog").hide();
       $('.ui-widget-overlay').hide();
  }
});

回答by wildwindfeng

$('.ui-widget-overlay').hide().fadeIn();

This effect has issue on IE as the opacity won't work after fade in

这种效果在 IE 上有问题，因为淡入后不透明度将不起作用