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    <p>Too tricky probably, but it does show the animated spinning wheel, and seems to work just fine:</p> <pre><code>internalSetAllColumn: function(column, newValue) { column.masterValue = newValue; column.header = '&lt;div class="x-grid3-check-col-td loading-indicator"&gt;&amp;#160;&lt;/div&gt;'; // loading icon this.grid.getView().updateHeaders(); var store = this.grid.getStore(); var count = store.getCount(); var step = 5; var times = (count / step) &gt;&gt; 0; var task = { run: function() { var last = step * task.taskRunCount; var first = last - step; if (first &lt;= count) { var recs = store.getRange(first, last); Ext.each(recs, function(rec) { rec.set(this.dataIndex, newValue); }, this); } if (task.taskRunCount &gt; times) { column.renderHeaderCheck(); this.grid.getView().updateHeaders(); return false; } }, interval: 1, scope: this }; Ext.TaskMgr.start(task); } </code></pre> <p><div class="snippet" data-lang="js" data-hide="true" data-console="true" data-babel="false"> <div class="snippet-code snippet-currently-hidden"> <pre class="snippet-code-js lang-js prettyprint-override"><code>/*global Ext */ Ext.grid.CheckColumn = function(config){ Ext.apply(this, config); if(!this.id){ this.id = Ext.id(); } this.headerText = this.headerText || this.header || '&amp;#160;'; this.renderer = this.renderer.createDelegate(this); }; Ext.grid.CheckColumn.prototype = { init: function(grid) { this.grid = grid; var column = this.grid.getColumnModel().getColumnById(this.id); column.masterValue = false; if (this.headerCheck) { column.renderHeaderCheck(); } this.grid.on('headerclick', this.onHeaderClick, this); this.grid.on('render', function() { var view = this.grid.getView(); view.mainBody.on('mousedown', this.onMouseDown, this); view.updateHeaders(); }, this); } , dataIndex: '' , masterValue: false , width: 90 , fixed: true , headerCheck: false , enableHeaderControl: true , onMouseDown: function(e, t) { if (!this.readonly) { if (Ext.fly(t).hasClass('x-grid3-cc-' + this.id)) { e.stopEvent(); var editEvent = {}; editEvent.row = this.grid.getView().findRowIndex(t); editEvent.column = this.grid.getColumnModel().findColumnIndex(this.dataIndex); editEvent.grid = this.grid; editEvent.field = this.dataIndex; editEvent.record = this.grid.store.getAt(editEvent.row); editEvent.originalValue = editEvent.record.data[this.dataIndex]; editEvent.value = !editEvent.originalValue; editEvent.record.set(editEvent.field, editEvent.value); editEvent.grid.fireEvent('afteredit', editEvent); } } }, getCheckedCls: function(v) { return v === -1 ? 'x-grid3-check-col-gray' : (v ? 'x-grid3-check-col-on' : 'x-grid3-check-col'); }, renderHeaderCheck: function() { this.header = '&lt;div class="' + this.getCheckedCls(this.masterValue) + '"&gt;' + this.headerText + '&lt;/div&gt;'; }, onHeaderClick: function(grid, columnIndex, event) { var colModel = grid.getColumnModel(); var cIndex = colModel.getIndexById(this.id); if (cIndex == columnIndex &amp;&amp; this.enableHeaderControl !== false &amp;&amp; this.headerCheck) { var column = colModel.getColumnById(this.id); var newValue = !column.masterValue; this.internalSetAllColumn(column, newValue); colModel.fireEvent("headerchange", colModel, columnIndex, column.header); this.grid.getView().updateHeaders(); } }, renderer: function(v, p, record, rowIndex, colIndex, store) { p.css += ' x-grid3-check-col-td'; return '&lt;div class="' + this.getCheckedCls(v) + ' x-grid3-cc-' + this.id + '"&gt; &lt;/div&gt;'; }, internalSetAllColumn: function(column, newValue) { column.masterValue = newValue; column.header = '&lt;div class="x-grid3-check-col-td loading-indicator"&gt;&amp;#160;&lt;/div&gt;'; // loading icon this.grid.getView().updateHeaders(); var store = this.grid.getStore(); var count = store.getCount(); var step = 5; var times = (count / step) &gt;&gt; 0; var task = { run: function() { var last = step * task.taskRunCount; var first = last - step; if (first &lt;= count) { var recs = store.getRange(first, last); Ext.each(recs, function(rec) { rec.set(this.dataIndex, newValue); }, this); } if (task.taskRunCount &gt; times) { column.renderHeaderCheck(); this.grid.getView().updateHeaders(); return false; } }, interval: 1, scope: this }; Ext.TaskMgr.start(task); }, setAllColumn: function(columnIndex, newValue) { var colModel = this.grid.getColumnModel(); var colId = colModel.getColumnId(columnIndex); var column = colModel.getColumnById(colId); this.internalSetAllColumn(column, newValue); this.grid.getView().updateHeaders(); } }; // ----------------------------------------- // End of plugin - Beginning of example code // ----------------------------------------- var chkColCountry = new Ext.grid.CheckColumn({ dataIndex: 'State.After', width: 50, headerCheck: true }); var dsCountries = new Ext.data.ArrayStore({ fields: ['Id', 'Name'] , data: [["US","United States"],["CA","Canada"],["AF","Afghanistan"],["AL","Albania"],["DZ","Algeria"],["DS","American Samoa"],["AD","Andorra"],["AO","Angola"],["AI","Anguilla"],["AQ","Antarctica"],["AG","Antigua and/or Barbuda"],["AR","Argentina"],["AM","Armenia"],["AW","Aruba"],["AU","Australia"],["AT","Austria"],["AZ","Azerbaijan"],["BS","Bahamas"],["BH","Bahrain"],["BD","Bangladesh"],["BB","Barbados"],["BY","Belarus"],["BE","Belgium"],["BZ","Belize"],["BJ","Benin"],["BM","Bermuda"],["BT","Bhutan"],["BO","Bolivia"],["BA","Bosnia and Herzegovina"],["BW","Botswana"],["BV","Bouvet Island"],["BR","Brazil"],["IO","British lndian Ocean Territory"],["BN","Brunei Darussalam"],["BG","Bulgaria"],["BF","Burkina Faso"],["BI","Burundi"],["KH","Cambodia"],["CM","Cameroon"],["CV","Cape Verde"],["KY","Cayman Islands"],["CF","Central African Republic"],["TD","Chad"],["CL","Chile"],["CN","China"],["CX","Christmas Island"],["CC","Cocos (Keeling) Islands"],["CO","Colombia"],["KM","Comoros"],["CG","Congo"],["CK","Cook Islands"],["CR","Costa Rica"],["HR","Croatia (Hrvatska)"],["CU","Cuba"],["CY","Cyprus"],["CZ","Czech Republic"],["DK","Denmark"],["DJ","Djibouti"],["DM","Dominica"],["DO","Dominican Republic"],["TP","East Timor"],["EC","Ecudaor"],["EG","Egypt"],["SV","El Salvador"],["GQ","Equatorial Guinea"],["ER","Eritrea"],["EE","Estonia"],["ET","Ethiopia"],["FK","Falkland Islands (Malvinas)"],["FO","Faroe Islands"],["FJ","Fiji"],["FI","Finland"],["FR","France"],["FX","France, Metropolitan"],["GF","French Guiana"],["PF","French Polynesia"],["TF","French Southern Territories"],["GA","Gabon"],["GM","Gambia"],["GE","Georgia"],["DE","Germany"],["GH","Ghana"],["GI","Gibraltar"],["GR","Greece"],["GL","Greenland"],["GD","Grenada"],["GP","Guadeloupe"],["GU","Guam"],["GT","Guatemala"],["GN","Guinea"],["GW","Guinea-Bissau"],["GY","Guyana"],["HT","Haiti"],["HM","Heard and Mc Donald Islands"],["HN","Honduras"],["HK","Hong Kong"],["HU","Hungary"],["IS","Iceland"],["IN","India"],["ID","Indonesia"],["IR","Iran (Islamic Republic of)"],["IQ","Iraq"],["IE","Ireland"],["IL","Israel"],["IT","Italy"],["CI","Ivory Coast"],["JM","Jamaica"],["JP","Japan"],["JO","Jordan"],["KZ","Kazakhstan"],["KE","Kenya"],["KI","Kiribati"],["KP","Korea, Democratic People's Republic of"],["KR","Korea, Republic of"],["KW","Kuwait"],["KG","Kyrgyzstan"],["LA","Lao People's Democratic Republic"],["LV","Latvia"],["LB","Lebanon"],["LS","Lesotho"],["LR","Liberia"],["LY","Libyan Arab Jamahiriya"],["LI","Liechtenstein"],["LT","Lithuania"],["LU","Luxembourg"],["MO","Macau"],["MK","Macedonia"],["MG","Madagascar"],["MW","Malawi"],["MY","Malaysia"],["MV","Maldives"],["ML","Mali"],["MT","Malta"],["MH","Marshall Islands"],["MQ","Martinique"],["MR","Mauritania"],["MU","Mauritius"],["TY","Mayotte"],["MX","Mexico"],["FM","Micronesia, Federated States of"],["MD","Moldova, Republic of"],["MC","Monaco"],["MN","Mongolia"],["MS","Montserrat"],["MA","Morocco"],["MZ","Mozambique"],["MM","Myanmar"],["NA","Namibia"],["NR","Nauru"],["NP","Nepal"],["NL","Netherlands"],["AN","Netherlands Antilles"],["NC","New Caledonia"],["NZ","New Zealand"],["NI","Nicaragua"],["NE","Niger"],["NG","Nigeria"],["NU","Niue"],["NF","Norfork Island"],["MP","Northern Mariana Islands"],["NO","Norway"],["OM","Oman"],["PK","Pakistan"],["PW","Palau"],["PA","Panama"],["PG","Papua New Guinea"],["PY","Paraguay"],["PE","Peru"],["PH","Philippines"],["PN","Pitcairn"],["PL","Poland"],["PT","Portugal"],["PR","Puerto Rico"],["QA","Qatar"],["RE","Reunion"],["RO","Romania"],["RU","Russian Federation"],["RW","Rwanda"],["KN","Saint Kitts and Nevis"],["LC","Saint Lucia"],["VC","Saint Vincent and the Grenadines"],["WS","Samoa"],["SM","San Marino"],["ST","Sao Tome and Principe"],["SA","Saudi Arabia"],["SN","Senegal"],["SC","Seychelles"],["SL","Sierra Leone"],["SG","Singapore"],["SK","Slovakia"],["SI","Slovenia"],["SB","Solomon Islands"],["SO","Somalia"],["ZA","South Africa"],["GS","South Georgia South Sandwich Islands"],["ES","Spain"],["LK","Sri Lanka"],["SH","St. Helena"],["PM","St. Pierre and Miquelon"],["SD","Sudan"],["SR","Suriname"],["SJ","Svalbarn and Jan Mayen Islands"],["SZ","Swaziland"],["SE","Sweden"],["CH","Switzerland"],["SY","Syrian Arab Republic"],["TW","Taiwan"],["TJ","Tajikistan"],["TZ","Tanzania, United Republic of"],["TH","Thailand"],["TG","Togo"],["TK","Tokelau"],["TO","Tonga"],["TT","Trinidad and Tobago"],["TN","Tunisia"],["TR","Turkey"],["TM","Turkmenistan"],["TC","Turks and Caicos Islands"],["TV","Tuvalu"],["UG","Uganda"],["UA","Ukraine"],["AE","United Arab Emirates"],["GB","United Kingdom"],["UM","United States minor outlying islands"],["UY","Uruguay"],["UZ","Uzbekistan"],["VU","Vanuatu"],["VA","Vatican City State"],["VE","Venezuela"],["VN","Vietnam"],["VG","Virigan Islands (British)"],["VI","Virgin Islands (U.S.)"],["WF","Wallis and Futuna Islands"],["EH","Western Sahara"],["YE","Yemen"],["YU","Yugoslavia"],["ZR","Zaire"],["ZM","Zambia"],["ZW","Zimbabwe"]] , autoLoad: false }); var cmCountry = new Ext.grid.ColumnModel([ chkColCountry , { id: 'Id', header: 'Id', dataIndex: 'Id', width: 40 } , { id: 'Name', header: 'CountryName', dataIndex: 'Name', width: 460 } , { id: 'After', header: 'After', dataIndex: 'State.After', hidden: true } ]); var grdCountries = new Ext.grid.GridPanel({ store: dsCountries , cm: cmCountry , plugins: chkColCountry , enableHdMenu: false }); var win = new Ext.Window({ layout: 'fit' , height: 190 , width: 600 , items: [grdCountries] }); win.show();</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;link href="//cdnjs.cloudflare.com/ajax/libs/extjs/3.4.1-1/resources/css/ext-all.css" rel="stylesheet"/&gt; &lt;script src="//cdnjs.cloudflare.com/ajax/libs/extjs/3.4.1-1/adapter/ext/ext-base.js"&gt;&lt;/script&gt; &lt;script src="//cdnjs.cloudflare.com/ajax/libs/extjs/3.4.1-1/ext-all.js"&gt;&lt;/script&gt;</code></pre> </div> </div> </p>
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    1. POLong process blocks waiting icon render in ExtJS
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    1. USMariano Desanze
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    1. COPlease see my edited answer.
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      1. USBrian Moeskau
 

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