javascript - Only show columns that are filled from external JSON in ExtJS 3.x -


i parsing external json source in extjs , want display data in extjs grid. works perfectly.

there maximum set of fields predicitable, in cases of fields empty/not in json. if field not filled @ all, should not hidden.

is there functionality hide dynamically in extjs 3.x?

my code far:

var store = new ext.data.jsonstore({     url     : '/data/all.json',     storeid : 'mainstore',     fields  : ['name', 'company', 'country'] }); store.load()   var columns = [];     var colmodel = new ext.grid.columnmodel([         {header: 'name', sortable: true, dataindex: 'name', filterable: true, hidden: false, filter: {type: 'string'}},         {header: 'company', sortable: true, dataindex: 'company', filterable: true, hidden: false, filter: {type: 'string'}},         {header: 'country', sortable: true, dataindex: 'country', filterable: true, hidden: false, filter: {type: 'string'}},      ]);

my json like:

this should display fields.

[ {"name": "jon doe", "company": "acme inc.", "country": "mexico"}, {"name" : "jane doe", "company" : "acme ltd", "country" : "usa"}]

this should show name , company.

[ {"name": "jon doe", "company": "acme inc."}, {"name" : "jane doe", "company" : "acme ltd"}]

this should again show fields.

[ {"name": "jon doe", "company": "acme inc."}, {"name" : "jane doe", "company" : "acme ltd", "country" : "usa"}]

help appreciated.

you can create function evaluates data , return boolean.

var showorhidecolumns = function(columnname) {     var records = store.getrange(),         hidden = false;      ext.each(records, function(itm, idx) {         if (!itm.get(columnname)) {             hidden = true;             break;         }     });      return hidden; };

and use above function in headers. may want check scope of method in code.

{ header: 'name', hidden: showorhidecolumns }

note: above code not tested.


Comments

Post a Comment

Popular posts from this blog

commonjs - How to write a typescript definition file for a node module that exports a function? -

consider, toml node module can use: // toml.d.ts declare module toml { export function parse(value:string):any; } declare module "toml" { export = toml; } then: /// <reference path="../../../../../defs/toml/toml.d.ts"/> import toml = require('toml'); toml.parse(...); however, node module export single function, such 'glob' ( https://github.com/isaacs/node-glob ). the node usage of module be: var glob = require("glob") glob("*.js", {}, callback(err, files) { ... }); you'd naively expect this: // glob.d.ts declare function globs(paths:string, options:any, callback:{(err:any, files:string[]):void; ...but because typescripts 'import' semantics bit strange, seems can use 'import .. = require()' statement alias modules . trying call: /// <reference path="../../../../../defs/glob/glob.d.ts"/> import blog = require('glob'); results in: error ts2072: mod
Read more

openid - Okta: Failed to get authorization code through API call -

i'm integrating okta own idp server using okta's api. i'm implementing authorization code flow following steps below: in own server, use /api/v1/authn endpoint sessiontoken. use sessiontoken obtain authorization calling endpoint: /oauth2/v1/authorize?client_id=" + clientid + "&sessiontoken=" + sessiontoken + "&response_type=code&response_mode=query&scope=openid&redirect_uri=" + redirecturl + "&state=evanyang&nonce=" it's supposed return response status code 302 , location header containing redirect url code value. however, keep getting response status code 200 , without location header, html body saying "you using unsupported browser." , "javascript disabled on browser." according api documentation: http://developer.okta.com/docs/api/resources/oidc.html#authentication-request , sessiontoken parameter sufficient this: an okta one-time sessiontoken. allows api-based
Read more

thorough guide for profiling racket code -

did googling ("racket profiling", "racket measure performance"), didn't find , there no examples in docs. did google "profile" search on htdp - no luck. (profile (f ...)) output isn't obvious other small snippets. ideally want python's python -m cprofile usage examples. when search "python profiling", both duckduckgo , google give top result: 26.4. python profilers . (although scanned quickly, seems more of reference "thorough usage guide" examples. if had else in mind, perhaps please link that?) the equivalent racket documentation be: profile: statistical profiler . a usage example: #lang racket (require profile) (profile-thunk (thunk (function-to-profile arg0 arg1) )) here (thunk e) convenience (lambda () e) . bigger example: #lang racket (module mod racket (provide f) (define (f) (for/list ([i 10000]) i))) (require (prefix-in mod: 'mod)) (define (f) (for ([i 10000
Read more