我想在 JQuery UI 对话框的标题栏（右上角）中添加一个帮助图标。
我从默认对话框演示开始
$('span.OK').click(function() {
setTimeout(function(){ $( "#dialog" ).dialog(); }, 100);
});
这是小提琴 http://jsfiddle.net/survivant/cyFxp/3/
我发现主题中有一个默认的帮助图标，但是我不知道如何在标题栏中显示它。
目标是拥有一个 ? （帮助）按钮显示在 X（关闭）按钮旁边。当我点击它时，我想要打开一个弹出窗口（可能是另一个对话框），它会显示帮助。
编辑
多亏了给出的答案，我现在有了一个帮助图标，单击该图标会显示警报。但是，当悬停在此图标上时，光标是“移动”光标，而不是像关闭按钮那样的“指针”光标。
如何防止“移动”光标转而使用“指针”光标？
PS。下面答案中的演示在 jsbin 中工作，但我在 jsfiddle 中的演示不起作用。
您可以使用jquery ui 对话框的dialogClass 属性为您的对话框提供一个类。比您可以搜索该类并附ui-icon-help加到对话框标题栏。检查这个小提琴：
现在您可以根据需要在图标上设置必要的事件。
希望这就是你要找的！
编辑
我已经检查了您的小提琴并对其进行了更新，请检查：
我知道这是一个旧线程，但我认为这可能会对某人有所帮助。
如果您正在动态创建对话框（而不从现有 HTML 元素创建对话框），我发现最简单的方法是使用对话框的“打开”事件（http://api.jqueryui.com/dialog/ #event-open ) 将您的图标添加（或附加）到标题。
以下示例使用带有 Twitter Bootstrap 的字体很棒的图标，但您可以为 myIcon 变量使用任何您想要的图标或图像：
var myIcon = '<i class="icon icon-flag-checkered icon-large pull-left"></i>';
var myDialog = $('<div title="ALMOST DONE!">'
+ 'Your Text/HTML Here'
+ '</div>');
myDialog.dialog({
resizable : false,
height : 'auto',
open : function(){
$(this)
.parent()
.children(".ui-dialog-titlebar")
.prepend(myIcon);
},
buttons : {
"Any Button" : function(){
alert('Yep, you clicked it.')
},
"OK" : function(){
$(this).dialog('close');
}
}
});
jsfiddle 的示例：http: //jsfiddle.net/drb26/2/
我在 jQuery UI 对话框中添加了一个“图标”选项。完整的修改代码可以在这里找到：https ://jsfiddle.net/jaysudo/02nwzg8g/1/
/*!
* jQuery UI Dialog 1.11.4
*
* Copyright jQuery Foundation and other contributors
* Released under the MIT license.
*
* Modified by: Jay Sudo <jay@jaysudo.com>
* 05/11/2015
*
*/
var dialog = $.widget( "ui.dialog", {
version: "1.11.4",
options: {
icon: null,
appendTo: "body",
autoOpen: true,
buttons: [],
closeOnEscape: true,
closeText: "Close",
dialogClass: "",
draggable: true,
hide: null,
height: "auto",
maxHeight: null,
maxWidth: null,
minHeight: 150,
minWidth: 150,
modal: false,
position: {
my: "center",
at: "center",
of: window,
collision: "fit",
// Ensure the titlebar is always visible
using: function( pos ) {
var topOffset = $( this ).css( pos ).offset().top;
if ( topOffset < 0 ) {
$( this ).css( "top", pos.top - topOffset );
}
}
},
resizable: true,
show: null,
title: null,
width: 300,
// callbacks
beforeClose: null,
close: null,
drag: null,
dragStart: null,
dragStop: null,
focus: null,
open: null,
resize: null,
resizeStart: null,
resizeStop: null
},
sizeRelatedOptions: {
buttons: true,
height: true,
maxHeight: true,
maxWidth: true,
minHeight: true,
minWidth: true,
width: true
},
resizableRelatedOptions: {
maxHeight: true,
maxWidth: true,
minHeight: true,
minWidth: true
},
_create: function() {
this.originalCss = {
display: this.element[ 0 ].style.display,
width: this.element[ 0 ].style.width,
minHeight: this.element[ 0 ].style.minHeight,
maxHeight: this.element[ 0 ].style.maxHeight,
height: this.element[ 0 ].style.height
};
this.originalPosition = {
parent: this.element.parent(),
index: this.element.parent().children().index( this.element )
};
this.originalTitle = this.element.attr( "title" );
this.options.title = this.options.title || this.originalTitle;
this.options.icon = this.options.icon || "ui-icon-info";
this._createWrapper();
this.element
.show()
.removeAttr( "title" )
.addClass( "ui-dialog-content ui-widget-content" )
.appendTo( this.uiDialog );
this._createTitlebar();
this._createButtonPane();
if ( this.options.draggable && $.fn.draggable ) {
this._makeDraggable();
}
if ( this.options.resizable && $.fn.resizable ) {
this._makeResizable();
}
this._isOpen = false;
this._trackFocus();
},
_init: function() {
if ( this.options.autoOpen ) {
this.open();
}
},
_appendTo: function() {
var element = this.options.appendTo;
if ( element && (element.jquery || element.nodeType) ) {
return $( element );
}
return this.document.find( element || "body" ).eq( 0 );
},
_destroy: function() {
var next,
originalPosition = this.originalPosition;
this._untrackInstance();
this._destroyOverlay();
this.element
.removeUniqueId()
.removeClass( "ui-dialog-content ui-widget-content" )
.css( this.originalCss )
// Without detaching first, the following becomes really slow
.detach();
this.uiDialog.stop( true, true ).remove();
if ( this.originalTitle ) {
this.element.attr( "title", this.originalTitle );
}
next = originalPosition.parent.children().eq( originalPosition.index );
// Don't try to place the dialog next to itself (#8613)
if ( next.length && next[ 0 ] !== this.element[ 0 ] ) {
next.before( this.element );
} else {
originalPosition.parent.append( this.element );
}
},
widget: function() {
return this.uiDialog;
},
disable: $.noop,
enable: $.noop,
close: function( event ) {
var activeElement,
that = this;
if ( !this._isOpen || this._trigger( "beforeClose", event ) === false ) {
return;
}
this._isOpen = false;
this._focusedElement = null;
this._destroyOverlay();
this._untrackInstance();
if ( !this.opener.filter( ":focusable" ).focus().length ) {
// support: IE9
// IE9 throws an "Unspecified error" accessing document.activeElement from an <iframe>
try {
activeElement = this.document[ 0 ].activeElement;
// Support: IE9, IE10
// If the <body> is blurred, IE will switch windows, see #4520
if ( activeElement && activeElement.nodeName.toLowerCase() !== "body" ) {
// Hiding a focused element doesn't trigger blur in WebKit
// so in case we have nothing to focus on, explicitly blur the active element
// https://bugs.webkit.org/show_bug.cgi?id=47182
$( activeElement ).blur();
}
} catch ( error ) {}
}
this._hide( this.uiDialog, this.options.hide, function() {
that._trigger( "close", event );
});
},
isOpen: function() {
return this._isOpen;
},
moveToTop: function() {
this._moveToTop();
},
_moveToTop: function( event, silent ) {
var moved = false,
zIndices = this.uiDialog.siblings( ".ui-front:visible" ).map(function() {
return +$( this ).css( "z-index" );
}).get(),
zIndexMax = Math.max.apply( null, zIndices );
if ( zIndexMax >= +this.uiDialog.css( "z-index" ) ) {
this.uiDialog.css( "z-index", zIndexMax + 1 );
moved = true;
}
if ( moved && !silent ) {
this._trigger( "focus", event );
}
return moved;
},
open: function() {
var that = this;
if ( this._isOpen ) {
if ( this._moveToTop() ) {
this._focusTabbable();
}
return;
}
this._isOpen = true;
this.opener = $( this.document[ 0 ].activeElement );
this._size();
this._position();
this._createOverlay();
this._moveToTop( null, true );
// Ensure the overlay is moved to the top with the dialog, but only when
// opening. The overlay shouldn't move after the dialog is open so that
// modeless dialogs opened after the modal dialog stack properly.
if ( this.overlay ) {
this.overlay.css( "z-index", this.uiDialog.css( "z-index" ) - 1 );
}
this._show( this.uiDialog, this.options.show, function() {
that._focusTabbable();
that._trigger( "focus" );
});
// Track the dialog immediately upon openening in case a focus event
// somehow occurs outside of the dialog before an element inside the
// dialog is focused (#10152)
this._makeFocusTarget();
this._trigger( "open" );
},
_focusTabbable: function() {
// Set focus to the first match:
// 1. An element that was focused previously
// 2. First element inside the dialog matching [autofocus]
// 3. Tabbable element inside the content element
// 4. Tabbable element inside the buttonpane
// 5. The close button
// 6. The dialog itself
var hasFocus = this._focusedElement;
if ( !hasFocus ) {
hasFocus = this.element.find( "[autofocus]" );
}
if ( !hasFocus.length ) {
hasFocus = this.element.find( ":tabbable" );
}
if ( !hasFocus.length ) {
hasFocus = this.uiDialogButtonPane.find( ":tabbable" );
}
if ( !hasFocus.length ) {
hasFocus = this.uiDialogTitlebarClose.filter( ":tabbable" );
}
if ( !hasFocus.length ) {
hasFocus = this.uiDialog;
}
hasFocus.eq( 0 ).focus();
},
_keepFocus: function( event ) {
function checkFocus() {
var activeElement = this.document[0].activeElement,
isActive = this.uiDialog[0] === activeElement ||
$.contains( this.uiDialog[0], activeElement );
if ( !isActive ) {
this._focusTabbable();
}
}
event.preventDefault();
checkFocus.call( this );
// support: IE
// IE <= 8 doesn't prevent moving focus even with event.preventDefault()
// so we check again later
this._delay( checkFocus );
},
_createWrapper: function() {
this.uiDialog = $("<div>")
.addClass( "ui-dialog ui-widget ui-widget-content ui-corner-all ui-front " +
this.options.dialogClass )
.hide()
.attr({
// Setting tabIndex makes the div focusable
tabIndex: -1,
role: "dialog"
})
.appendTo( this._appendTo() );
this._on( this.uiDialog, {
keydown: function( event ) {
if ( this.options.closeOnEscape && !event.isDefaultPrevented() && event.keyCode &&
event.keyCode === $.ui.keyCode.ESCAPE ) {
event.preventDefault();
this.close( event );
return;
}
// prevent tabbing out of dialogs
if ( event.keyCode !== $.ui.keyCode.TAB || event.isDefaultPrevented() ) {
return;
}
var tabbables = this.uiDialog.find( ":tabbable" ),
first = tabbables.filter( ":first" ),
last = tabbables.filter( ":last" );
if ( ( event.target === last[0] || event.target === this.uiDialog[0] ) && !event.shiftKey ) {
this._delay(function() {
first.focus();
});
event.preventDefault();
} else if ( ( event.target === first[0] || event.target === this.uiDialog[0] ) && event.shiftKey ) {
this._delay(function() {
last.focus();
});
event.preventDefault();
}
},
mousedown: function( event ) {
if ( this._moveToTop( event ) ) {
this._focusTabbable();
}
}
});
// We assume that any existing aria-describedby attribute means
// that the dialog content is marked up properly
// otherwise we brute force the content as the description
if ( !this.element.find( "[aria-describedby]" ).length ) {
this.uiDialog.attr({
"aria-describedby": this.element.uniqueId().attr( "id" )
});
}
},
_createTitlebar: function() {
var uiDialogTitle;
this.uiDialogTitlebar = $( "<div>" )
.addClass( "ui-dialog-titlebar ui-widget-header ui-corner-all ui-helper-clearfix" )
.prependTo( this.uiDialog );
this._on( this.uiDialogTitlebar, {
mousedown: function( event ) {
// Don't prevent click on close button (#8838)
// Focusing a dialog that is partially scrolled out of view
// causes the browser to scroll it into view, preventing the click event
if ( !$( event.target ).closest( ".ui-dialog-titlebar-close" ) ) {
// Dialog isn't getting focus when dragging (#8063)
this.uiDialog.focus();
}
}
});
// support: IE
// Use type="button" to prevent enter keypresses in textboxes from closing the
// dialog in IE (#9312)
this.uiDialogTitlebarClose = $( "<button type='button'></button>" )
.button({
label: this.options.closeText,
icons: {
primary: "ui-icon-closethick"
},
text: false
})
.addClass( "ui-dialog-titlebar-close" )
.appendTo( this.uiDialogTitlebar );
this._on( this.uiDialogTitlebarClose, {
click: function( event ) {
event.preventDefault();
this.close( event );
}
});
uiDialogTitle = $( "<span>" )
.uniqueId()
.addClass( "ui-dialog-title" )
.prependTo( this.uiDialogTitlebar );
this._title( uiDialogTitle );
this.uiDialog.attr({
"aria-labelledby": uiDialogTitle.attr( "id" )
});
},
_title: function( title ) {
var uiDialogTitleIcon = $( "<span>" )
.uniqueId()
.addClass( "ui-icon " + this.options.icon)
.css( {"display": "inline-block"} );
if ( !this.options.title ) {
title.html( " " );
}
title.html(uiDialogTitleIcon[0].outerHTML + " " + this.options.title );
},
_createButtonPane: function() {
this.uiDialogButtonPane = $( "<div>" )
.addClass( "ui-dialog-buttonpane ui-widget-content ui-helper-clearfix" );
this.uiButtonSet = $( "<div>" )
.addClass( "ui-dialog-buttonset" )
.appendTo( this.uiDialogButtonPane );
this._createButtons();
},
_createButtons: function() {
var that = this,
buttons = this.options.buttons;
// if we already have a button pane, remove it
this.uiDialogButtonPane.remove();
this.uiButtonSet.empty();
if ( $.isEmptyObject( buttons ) || ($.isArray( buttons ) && !buttons.length) ) {
this.uiDialog.removeClass( "ui-dialog-buttons" );
return;
}
$.each( buttons, function( name, props ) {
var click, buttonOptions;
props = $.isFunction( props ) ?
{ click: props, text: name } :
props;
// Default to a non-submitting button
props = $.extend( { type: "button" }, props );
// Change the context for the click callback to be the main element
click = props.click;
props.click = function() {
click.apply( that.element[ 0 ], arguments );
};
buttonOptions = {
icons: props.icons,
text: props.showText
};
delete props.icons;
delete props.showText;
$( "<button></button>", props )
.button( buttonOptions )
.appendTo( that.uiButtonSet );
});
this.uiDialog.addClass( "ui-dialog-buttons" );
this.uiDialogButtonPane.appendTo( this.uiDialog );
},
_makeDraggable: function() {
var that = this,
options = this.options;
function filteredUi( ui ) {
return {
position: ui.position,
offset: ui.offset
};
}
this.uiDialog.draggable({
cancel: ".ui-dialog-content, .ui-dialog-titlebar-close",
handle: ".ui-dialog-titlebar",
containment: "document",
start: function( event, ui ) {
$( this ).addClass( "ui-dialog-dragging" );
that._blockFrames();
that._trigger( "dragStart", event, filteredUi( ui ) );
},
drag: function( event, ui ) {
that._trigger( "drag", event, filteredUi( ui ) );
},
stop: function( event, ui ) {
var left = ui.offset.left - that.document.scrollLeft(),
top = ui.offset.top - that.document.scrollTop();
options.position = {
my: "left top",
at: "left" + (left >= 0 ? "+" : "") + left + " " +
"top" + (top >= 0 ? "+" : "") + top,
of: that.window
};
$( this ).removeClass( "ui-dialog-dragging" );
that._unblockFrames();
that._trigger( "dragStop", event, filteredUi( ui ) );
}
});
},
_makeResizable: function() {
var that = this,
options = this.options,
handles = options.resizable,
// .ui-resizable has position: relative defined in the stylesheet
// but dialogs have to use absolute or fixed positioning
position = this.uiDialog.css("position"),
resizeHandles = typeof handles === "string" ?
handles :
"n,e,s,w,se,sw,ne,nw";
function filteredUi( ui ) {
return {
originalPosition: ui.originalPosition,
originalSize: ui.originalSize,
position: ui.position,
size: ui.size
};
}
this.uiDialog.resizable({
cancel: ".ui-dialog-content",
containment: "document",
alsoResize: this.element,
maxWidth: options.maxWidth,
maxHeight: options.maxHeight,
minWidth: options.minWidth,
minHeight: this._minHeight(),
handles: resizeHandles,
start: function( event, ui ) {
$( this ).addClass( "ui-dialog-resizing" );
that._blockFrames();
that._trigger( "resizeStart", event, filteredUi( ui ) );
},
resize: function( event, ui ) {
that._trigger( "resize", event, filteredUi( ui ) );
},
stop: function( event, ui ) {
var offset = that.uiDialog.offset(),
left = offset.left - that.document.scrollLeft(),
top = offset.top - that.document.scrollTop();
options.height = that.uiDialog.height();
options.width = that.uiDialog.width();
options.position = {
my: "left top",
at: "left" + (left >= 0 ? "+" : "") + left + " " +
"top" + (top >= 0 ? "+" : "") + top,
of: that.window
};
$( this ).removeClass( "ui-dialog-resizing" );
that._unblockFrames();
that._trigger( "resizeStop", event, filteredUi( ui ) );
}
})
.css( "position", position );
},
_trackFocus: function() {
this._on( this.widget(), {
focusin: function( event ) {
this._makeFocusTarget();
this._focusedElement = $( event.target );
}
});
},
_makeFocusTarget: function() {
this._untrackInstance();
this._trackingInstances().unshift( this );
},
_untrackInstance: function() {
var instances = this._trackingInstances(),
exists = $.inArray( this, instances );
if ( exists !== -1 ) {
instances.splice( exists, 1 );
}
},
_trackingInstances: function() {
var instances = this.document.data( "ui-dialog-instances" );
if ( !instances ) {
instances = [];
this.document.data( "ui-dialog-instances", instances );
}
return instances;
},
_minHeight: function() {
var options = this.options;
return options.height === "auto" ?
options.minHeight :
Math.min( options.minHeight, options.height );
},
_position: function() {
// Need to show the dialog to get the actual offset in the position plugin
var isVisible = this.uiDialog.is( ":visible" );
if ( !isVisible ) {
this.uiDialog.show();
}
this.uiDialog.position( this.options.position );
if ( !isVisible ) {
this.uiDialog.hide();
}
},
_setOptions: function( options ) {
var that = this,
resize = false,
resizableOptions = {};
$.each( options, function( key, value ) {
that._setOption( key, value );
if ( key in that.sizeRelatedOptions ) {
resize = true;
}
if ( key in that.resizableRelatedOptions ) {
resizableOptions[ key ] = value;
}
});
if ( resize ) {
this._size();
this._position();
}
if ( this.uiDialog.is( ":data(ui-resizable)" ) ) {
this.uiDialog.resizable( "option", resizableOptions );
}
},
_setOption: function( key, value ) {
var isDraggable, isResizable,
uiDialog = this.uiDialog;
if ( key === "dialogClass" ) {
uiDialog
.removeClass( this.options.dialogClass )
.addClass( value );
}
if ( key === "disabled" ) {
return;
}
this._super( key, value );
if ( key === "appendTo" ) {
this.uiDialog.appendTo( this._appendTo() );
}
if ( key === "buttons" ) {
this._createButtons();
}
if ( key === "closeText" ) {
this.uiDialogTitlebarClose.button({
// Ensure that we always pass a string
label: "" + value
});
}
if ( key === "draggable" ) {
isDraggable = uiDialog.is( ":data(ui-draggable)" );
if ( isDraggable && !value ) {
uiDialog.draggable( "destroy" );
}
if ( !isDraggable && value ) {
this._makeDraggable();
}
}
if ( key === "position" ) {
this._position();
}
if ( key === "resizable" ) {
// currently resizable, becoming non-resizable
isResizable = uiDialog.is( ":data(ui-resizable)" );
if ( isResizable && !value ) {
uiDialog.resizable( "destroy" );
}
// currently resizable, changing handles
if ( isResizable && typeof value === "string" ) {
uiDialog.resizable( "option", "handles", value );
}
// currently non-resizable, becoming resizable
if ( !isResizable && value !== false ) {
this._makeResizable();
}
}
if ( key === "title" ) {
this._title( this.uiDialogTitlebar.find( ".ui-dialog-title" ) );
}
},
_size: function() {
// If the user has resized the dialog, the .ui-dialog and .ui-dialog-content
// divs will both have width and height set, so we need to reset them
var nonContentHeight, minContentHeight, maxContentHeight,
options = this.options;
// Reset content sizing
this.element.show().css({
width: "auto",
minHeight: 0,
maxHeight: "none",
height: 0
});
if ( options.minWidth > options.width ) {
options.width = options.minWidth;
}
// reset wrapper sizing
// determine the height of all the non-content elements
nonContentHeight = this.uiDialog.css({
height: "auto",
width: options.width
})
.outerHeight();
minContentHeight = Math.max( 0, options.minHeight - nonContentHeight );
maxContentHeight = typeof options.maxHeight === "number" ?
Math.max( 0, options.maxHeight - nonContentHeight ) :
"none";
if ( options.height === "auto" ) {
this.element.css({
minHeight: minContentHeight,
maxHeight: maxContentHeight,
height: "auto"
});
} else {
this.element.height( Math.max( 0, options.height - nonContentHeight ) );
}
if ( this.uiDialog.is( ":data(ui-resizable)" ) ) {
this.uiDialog.resizable( "option", "minHeight", this._minHeight() );
}
},
_blockFrames: function() {
this.iframeBlocks = this.document.find( "iframe" ).map(function() {
var iframe = $( this );
return $( "<div>" )
.css({
position: "absolute",
width: iframe.outerWidth(),
height: iframe.outerHeight()
})
.appendTo( iframe.parent() )
.offset( iframe.offset() )[0];
});
},
_unblockFrames: function() {
if ( this.iframeBlocks ) {
this.iframeBlocks.remove();
delete this.iframeBlocks;
}
},
_allowInteraction: function( event ) {
if ( $( event.target ).closest( ".ui-dialog" ).length ) {
return true;
}
// TODO: Remove hack when datepicker implements
// the .ui-front logic (#8989)
return !!$( event.target ).closest( ".ui-datepicker" ).length;
},
_createOverlay: function() {
if ( !this.options.modal ) {
return;
}
// We use a delay in case the overlay is created from an
// event that we're going to be cancelling (#2804)
var isOpening = true;
this._delay(function() {
isOpening = false;
});
if ( !this.document.data( "ui-dialog-overlays" ) ) {
// Prevent use of anchors and inputs
// Using _on() for an event handler shared across many instances is
// safe because the dialogs stack and must be closed in reverse order
this._on( this.document, {
focusin: function( event ) {
if ( isOpening ) {
return;
}
if ( !this._allowInteraction( event ) ) {
event.preventDefault();
this._trackingInstances()[ 0 ]._focusTabbable();
}
}
});
}
this.overlay = $( "<div>" )
.addClass( "ui-widget-overlay ui-front" )
.appendTo( this._appendTo() );
this._on( this.overlay, {
mousedown: "_keepFocus"
});
this.document.data( "ui-dialog-overlays",
(this.document.data( "ui-dialog-overlays" ) || 0) + 1 );
},
_destroyOverlay: function() {
if ( !this.options.modal ) {
return;
}
if ( this.overlay ) {
var overlays = this.document.data( "ui-dialog-overlays" ) - 1;
if ( !overlays ) {
this.document
.unbind( "focusin" )
.removeData( "ui-dialog-overlays" );
} else {
this.document.data( "ui-dialog-overlays", overlays );
}
this.overlay.remove();
this.overlay = null;
}
}
});