As the sun rises and the forest mist clears, and the clouds return and the caves darken, these changes of light and shadow are the morning and evening in the mountains. Wildflowers bloom with their subtle fragrance, fine trees flourish with their dense shade, the wind and frost are pure and clean, and the water recedes to reveal the rocks—these are the four seasons in the mountains. Going out in the morning and returning in the evening, the scenery of the four seasons is different, and the joy is endless.至于负者歌于途,行者休于树,前者呼,后者应,伛偻提携,往来而不绝者,滁人游也。临溪而渔,溪深而鱼肥,酿泉为酒,泉香而酒洌,山肴野蔌,杂然而前陈者,太守宴也。宴酣之乐,非丝非竹,射者中,弈者胜,觥筹交错,起坐而喧哗者,众宾欢也。苍颜白发,颓然乎其间者,太守醉也。
/*!
* jQuery UI Selectable 1.13.3
* https://jqueryui.com
*
* Copyright OpenJS Foundation and other contributors
* Released under the MIT license.
* https://jquery.org/license
*/
//>>label: Selectable
//>>group: Interactions
//>>description: Allows groups of elements to be selected with the mouse.
//>>docs: https://api.jqueryui.com/selectable/
//>>demos: https://jqueryui.com/selectable/
//>>css.structure: ../../themes/base/selectable.css
( function( factory ) {
"use strict";
if ( typeof define === "function" && define.amd ) {
// AMD. Register as an anonymous module.
define( [
"jquery",
"./mouse",
"../version",
"../widget"
], factory );
} else {
// Browser globals
factory( jQuery );
}
} )( function( $ ) {
"use strict";
return $.widget( "ui.selectable", $.ui.mouse, {
version: "1.13.3",
options: {
appendTo: "body",
autoRefresh: true,
distance: 0,
filter: "*",
tolerance: "touch",
// Callbacks
selected: null,
selecting: null,
start: null,
stop: null,
unselected: null,
unselecting: null
},
_create: function() {
var that = this;
this._addClass( "ui-selectable" );
this.dragged = false;
// Cache selectee children based on filter
this.refresh = function() {
that.elementPos = $( that.element[ 0 ] ).offset();
that.selectees = $( that.options.filter, that.element[ 0 ] );
that._addClass( that.selectees, "ui-selectee" );
that.selectees.each( function() {
var $this = $( this ),
selecteeOffset = $this.offset(),
pos = {
left: selecteeOffset.left - that.elementPos.left,
top: selecteeOffset.top - that.elementPos.top
};
$.data( this, "selectable-item", {
element: this,
$element: $this,
left: pos.left,
top: pos.top,
right: pos.left + $this.outerWidth(),
bottom: pos.top + $this.outerHeight(),
startselected: false,
selected: $this.hasClass( "ui-selected" ),
selecting: $this.hasClass( "ui-selecting" ),
unselecting: $this.hasClass( "ui-unselecting" )
} );
} );
};
this.refresh();
this._mouseInit();
this.helper = $( "<div>" );
this._addClass( this.helper, "ui-selectable-helper" );
},
_destroy: function() {
this.selectees.removeData( "selectable-item" );
this._mouseDestroy();
},
_mouseStart: function( event ) {
var that = this,
options = this.options;
this.opos = [ event.pageX, event.pageY ];
this.elementPos = $( this.element[ 0 ] ).offset();
if ( this.options.disabled ) {
return;
}
this.selectees = $( options.filter, this.element[ 0 ] );
this._trigger( "start", event );
$( options.appendTo ).append( this.helper );
// position helper (lasso)
this.helper.css( {
"left": event.pageX,
"top": event.pageY,
"width": 0,
"height": 0
} );
if ( options.autoRefresh ) {
this.refresh();
}
this.selectees.filter( ".ui-selected" ).each( function() {
var selectee = $.data( this, "selectable-item" );
selectee.startselected = true;
if ( !event.metaKey && !event.ctrlKey ) {
that._removeClass( selectee.$element, "ui-selected" );
selectee.selected = false;
that._addClass( selectee.$element, "ui-unselecting" );
selectee.unselecting = true;
// selectable UNSELECTING callback
that._trigger( "unselecting", event, {
unselecting: selectee.element
} );
}
} );
$( event.target ).parents().addBack().each( function() {
var doSelect,
selectee = $.data( this, "selectable-item" );
if ( selectee ) {
doSelect = ( !event.metaKey && !event.ctrlKey ) ||
!selectee.$element.hasClass( "ui-selected" );
that._removeClass( selectee.$element, doSelect ? "ui-unselecting" : "ui-selected" )
._addClass( selectee.$element, doSelect ? "ui-selecting" : "ui-unselecting" );
selectee.unselecting = !doSelect;
selectee.selecting = doSelect;
selectee.selected = doSelect;
// selectable (UN)SELECTING callback
if ( doSelect ) {
that._trigger( "selecting", event, {
selecting: selectee.element
} );
} else {
that._trigger( "unselecting", event, {
unselecting: selectee.element
} );
}
return false;
}
} );
},
_mouseDrag: function( event ) {
this.dragged = true;
if ( this.options.disabled ) {
return;
}
var tmp,
that = this,
options = this.options,
x1 = this.opos[ 0 ],
y1 = this.opos[ 1 ],
x2 = event.pageX,
y2 = event.pageY;
if ( x1 > x2 ) {
tmp = x2; x2 = x1; x1 = tmp;
}
if ( y1 > y2 ) {
tmp = y2; y2 = y1; y1 = tmp;
}
this.helper.css( { left: x1, top: y1, width: x2 - x1, height: y2 - y1 } );
this.selectees.each( function() {
var selectee = $.data( this, "selectable-item" ),
hit = false,
offset = {};
//prevent helper from being selected if appendTo: selectable
if ( !selectee || selectee.element === that.element[ 0 ] ) {
return;
}
offset.left = selectee.left + that.elementPos.left;
offset.right = selectee.right + that.elementPos.left;
offset.top = selectee.top + that.elementPos.top;
offset.bottom = selectee.bottom + that.elementPos.top;
if ( options.tolerance === "touch" ) {
hit = ( !( offset.left > x2 || offset.right < x1 || offset.top > y2 ||
offset.bottom < y1 ) );
} else if ( options.tolerance === "fit" ) {
hit = ( offset.left > x1 && offset.right < x2 && offset.top > y1 &&
offset.bottom < y2 );
}
if ( hit ) {
// SELECT
if ( selectee.selected ) {
that._removeClass( selectee.$element, "ui-selected" );
selectee.selected = false;
}
if ( selectee.unselecting ) {
that._removeClass( selectee.$element, "ui-unselecting" );
selectee.unselecting = false;
}
if ( !selectee.selecting ) {
that._addClass( selectee.$element, "ui-selecting" );
selectee.selecting = true;
// selectable SELECTING callback
that._trigger( "selecting", event, {
selecting: selectee.element
} );
}
} else {
// UNSELECT
if ( selectee.selecting ) {
if ( ( event.metaKey || event.ctrlKey ) && selectee.startselected ) {
that._removeClass( selectee.$element, "ui-selecting" );
selectee.selecting = false;
that._addClass( selectee.$element, "ui-selected" );
selectee.selected = true;
} else {
that._removeClass( selectee.$element, "ui-selecting" );
selectee.selecting = false;
if ( selectee.startselected ) {
that._addClass( selectee.$element, "ui-unselecting" );
selectee.unselecting = true;
}
// selectable UNSELECTING callback
that._trigger( "unselecting", event, {
unselecting: selectee.element
} );
}
}
if ( selectee.selected ) {
if ( !event.metaKey && !event.ctrlKey && !selectee.startselected ) {
that._removeClass( selectee.$element, "ui-selected" );
selectee.selected = false;
that._addClass( selectee.$element, "ui-unselecting" );
selectee.unselecting = true;
// selectable UNSELECTING callback
that._trigger( "unselecting", event, {
unselecting: selectee.element
} );
}
}
}
} );
return false;
},
_mouseStop: function( event ) {
var that = this;
this.dragged = false;
$( ".ui-unselecting", this.element[ 0 ] ).each( function() {
var selectee = $.data( this, "selectable-item" );
that._removeClass( selectee.$element, "ui-unselecting" );
selectee.unselecting = false;
selectee.startselected = false;
that._trigger( "unselected", event, {
unselected: selectee.element
} );
} );
$( ".ui-selecting", this.element[ 0 ] ).each( function() {
var selectee = $.data( this, "selectable-item" );
that._removeClass( selectee.$element, "ui-selecting" )
._addClass( selectee.$element, "ui-selected" );
selectee.selecting = false;
selectee.selected = true;
selectee.startselected = true;
that._trigger( "selected", event, {
selected: selectee.element
} );
} );
this._trigger( "stop", event );
this.helper.remove();
return false;
}
} );
} );