AtomDataLoader¶
-
class
webix.AtomDataLoader()¶ Atomdataloader mixin
Referenced by¶
- components
DataLoader(),DataRecord().- views
property(),template(),toolbar().
External references¶
Code¶
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | webix.AtomDataLoader={
$init:function(config){
//prepare data store
this.data = {};
this.waitData = webix.promise.defer();
if (config)
this._settings.datatype = config.datatype||"json";
this.$ready.push(this._load_when_ready);
},
_load_when_ready:function(){
this._ready_for_data = true;
if (this._settings.url)
this.url_setter(this._settings.url);
if (this._settings.data)
this.data_setter(this._settings.data);
},
url_setter:function(value){
value = webix.proxy.$parse(value);
if (!this._ready_for_data) return value;
this.load(value, this._settings.datatype);
return value;
},
data_setter:function(value){
if (!this._ready_for_data) return value;
this.parse(value, this._settings.datatype);
return true;
},
//loads data from external URL
load:function(url,call){
var details = arguments[2] || null;
this.callEvent("onBeforeLoad",[]);
if (typeof call == "string"){ //second parameter can be a loading type or callback
//we are not using setDriver as data may be a non-datastore here
this.data.driver = webix.DataDriver[call];
call = arguments[2];
} else if (!this.data.driver)
this.data.driver = webix.DataDriver.json;
//load data by async ajax call
//loading_key - can be set by component, to ignore data from old async requests
var callback = [{
success: this._onLoad,
error: this._onLoadError
}];
if (call){
if (webix.isArray(call))
callback.push.apply(callback,call);
else
callback.push(call);
}
//proxy
url = webix.proxy.$parse(url);
if (url.$proxy && url.load)
return url.load(this, callback, details);
//promize
if (typeof url === "function"){
return url(details).then(
webix.bind(function(data){
webix.ajax.$callback(this, callback, "", data, -1);
}, this),
webix.bind(function(x){
webix.ajax.$callback(this, callback, "", null, x, true);
}, this)
);
}
//normal url
return webix.ajax(url,callback,this);
},
//loads data from object
parse:function(data,type){
//[webix.remote]
if (data && data.then && typeof data.then == "function"){
return data.then(webix.bind(function(data){
if (data && typeof data.json == "function")
data = data.json();
this.parse(data, type);
}, this));
}
//loading data from other component
if (data && data.sync && this.sync)
return this._syncData(data);
this.callEvent("onBeforeLoad",[]);
this.data.driver = webix.DataDriver[type||"json"];
this._onLoad(data,null);
},
_syncData: function(data){
if(this.data)
this.data.attachEvent("onSyncApply",webix.bind(function(){
if(this._call_onready)
this._call_onready();
},this));
this.sync(data);
},
_parse:function(data){
var parsed, record,
driver = this.data.driver;
record = driver.getRecords(data)[0];
parsed = record?driver.getDetails(record):{};
if (this.setValues)
this.setValues(parsed);
else
this.data = parsed;
},
_onLoadContinue:function(data, text, response, loader){
if (data){
if(!this.$onLoad || !this.$onLoad(data, this.data.driver)){
if(this.data && this.data._parse)
this.data._parse(data); //datastore
else
this._parse(data);
}
}
else
this._onLoadError(text, response, loader);
//data loaded, view rendered, call onready handler
if(this._call_onready)
this._call_onready();
this.callEvent("onAfterLoad",[]);
this.waitData.resolve();
},
//default after loading callback
_onLoad:function(text, response, loader){
var driver = this.data.driver;
var data;
if (loader === -1)
data = driver.toObject(response);
else{
//ignore data loading command if data was reloaded
if(this._ajax_queue)
this._ajax_queue.remove(loader);
data = driver.toObject(text, response);
}
if(!data || !data.then)
this._onLoadContinue(data);
else if(data.then && typeof data.then == "function")
data.then(webix.bind(this._onLoadContinue, this));
},
_onLoadError:function(text, xml, xhttp){
this.callEvent("onAfterLoad",[]);
this.callEvent("onLoadError",arguments);
webix.callEvent("onLoadError", [text, xml, xhttp, this]);
},
_check_data_feed:function(data){
if (!this._settings.dataFeed || this._ignore_feed || !data) return true;
var url = this._settings.dataFeed;
if (typeof url == "function")
return url.call(this, (data.id||data), data);
url = url+(url.indexOf("?")==-1?"?":"&")+"action=get&id="+encodeURIComponent(data.id||data);
this.callEvent("onBeforeLoad",[]);
webix.ajax(url, function(text,xml,loader){
this._ignore_feed=true;
var driver = webix.DataDriver.json;
var data = driver.toObject(text, xml);
if (data)
this.setValues(driver.getDetails(driver.getRecords(data)[0]));
else
this._onLoadError(text,xml,loader);
this._ignore_feed=false;
this.callEvent("onAfterLoad",[]);
}, this);
return false;
}
};
/*
Abstraction layer for different data types
*/
|