76 lines
1.2 KiB
JavaScript
76 lines
1.2 KiB
JavaScript
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var Lot = require('./lot');
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var IteratorIface = require('./iterator-iface');
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var ModelIface = require('./model-iface');
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/**
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* A light iterator for models. It assumes that its row and model properties
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* are always valid.
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*/
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module.exports = new Class({
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Extends: Lot
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,Implements: IteratorIface
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,Properties: {
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model: {
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type: ModelIface
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,set(x) {
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this._model = x;
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}
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,get() {
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return this._model;
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}
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},
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row: {
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type: Number
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,set(x) {
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this._row = x;
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this.rowChanged();
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}
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,get() {
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return this._row;
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}
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},
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numRows: {
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type: Number
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,get() {
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return this._model ?
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this._model.numRows : 0;
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}
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},
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ready: {
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type: Boolean
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,get() {
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return this._model ?
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this._model.ready : false;
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}
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}
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}
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,_model: null
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,initialize(props) {
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Object.assign(this, {
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_row: -1
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,_rowLock: false
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});
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Lot.prototype.initialize.call(this, props);
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}
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,_paramsChanged(diff) {
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if (!this._rowLock)
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for (var key in diff)
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this._model.set(this._row, key, diff[key]);
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}
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,rowChanged() {
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var row;
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if (this._model)
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row = this._model.getObject(this._row);
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this._rowLock = true;
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this.params = row != null ? row : {};
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this._rowLock = false;
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}
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});
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