MORIWAKI.NETのメモ帳

元はページを切り替えるたびにRecordを作り直していたので、これを修正。

if (!Array.prototype.map) {
  Array.prototype.map = function(fun) {
    var len = this.length;
    if (typeof fun != 'function') {
      throw new TypeError();
    }
    var res = new Array(len);
    var thisp = arguments[1];
    for (var i = 0; i < len; i++) {
      if (i in this) {
        res[i] = fun.call(thisp, this[i], i, this);
      }
    }
    return res;
  };
}

Ext.ns('Ext.ux.data');

Ext.ux.data.PagingMemoryProxy = Ext.extend(Ext.data.MemoryProxy, {
  customFilter : null,
  resultMemory : null,
  constructor : function(data) {
    Ext.ux.data.PagingMemoryProxy.superclass.constructor.call(this);
    this.data = data;
  },
  insert : function(record) {
    this.resultMemory.records.unshift(record);
    this.resultMemory.totalRecords = this.resultMemory.records.length;
  },
  remove : function(record) {
    for (i = this.resultMemory.records.length - 1; i >= 0; i--) {
      if (this.resultMemory.records[i].id == record.id) {
        this.resultMemory.records.splice(i, 1);
        this.resultMemory.totalRecords = this.resultMemory.records.length;
        return;
      }
    }
  },
  doRequest : function(action, rs, params, reader, callback, scope, options) {
    params = params || {};
    var result = {
      success : null,
      records : null,
      totalRecords : null
    };
    try {
      if (!this.resultMemory) {
        this.resultMemory = reader.readRecords(this.data);
      }
    } catch (e) {
      this.fireEvent('loadexception', this, options, null, e);
      callback.call(scope, null, options, false);
      return;
    }

    // filtering
    if (params.filter !== undefined) {
      this.resultMemory.records = this.resultMemory.records.filter(function(el) {
            if (typeof(el) == 'object') {
              var att = params.filterCol || 0;
              return String(el.data[att]).match(params.filter)
                  ? true
                  : false;
            } else {
              return String(el).match(params.filter)
                  ? true
                  : false;
            }
          });
      this.resultMemory.totalRecords = this.resultMemory.records.length;
    }
    // sorting
    if (params.sort !== undefined) {
      var dir = String(params.dir).toUpperCase() == 'DESC' ? -1 : 1;
      var fn = function(v1, v2) {
        return v1 > v2 ? 1 : (v1 < v2 ? -1 : 0);
      };
      this.resultMemory.records.sort(function(a, b) {
            var v = 0;
            if (typeof(a) == 'object') {
              v = fn(a.data[params.sort], b.data[params.sort])
                  * dir;
            } else {
              v = fn(a, b) * dir;
            }
            if (v == 0) {
              v = (a.index < b.index ? -1 : 1);
            }
            return v;
          });
    }
    // paging (use undefined cause start can also be 0 (thus false))
    if (params.start !== undefined && params.limit !== undefined) {
      result.records = [];
      var index = 0;
      for (var i = params.start; i < params.start + params.limit; i++) {
        if (this.resultMemory.records[i]) {
          result.records[index++] = this.resultMemory.records[i];
        } else {
          break;
        }
      }
    }
    result.success = this.resultMemory.success;
    result.totalRecords = this.resultMemory.totalRecords;
    callback.call(scope, result, options, true);
  }
});

// backwards compat.
Ext.data.PagingMemoryProxy = Ext.ux.data.PagingMemoryProxy;

This entry was posted on 木曜日, 6月 3rd, 2010 at 3:19 PM and is filed under Ext JS, JavaScript. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.