98 lines
1.5 KiB
JavaScript
98 lines
1.5 KiB
JavaScript
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var Form = require ('./form');
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module.exports = new Class
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({
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Extends: Vn.Param
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,Tag: 'db-param'
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,Parent: 'form'
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,Properties:
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{
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/**
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* The form field referenced by this param.
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*/
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column:
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{
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type: String
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,set: function (x)
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{
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this._columnName = x;
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this.refresh ();
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}
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,get: function ()
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{
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this._columnName;
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}
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},
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/**
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* The form referenced by this param.
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*/
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form:
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{
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type: Form
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,set: function (x)
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{
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this.link ({_set: x},
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{
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'change': this.onSetChange
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});
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this.refresh ();
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}
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,get: function ()
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{
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return this._set;
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}
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},
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/**
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* Determines whether the link to the form is unidirectional, ie, a
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* change in the form updates the parameter but not vice versa.
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*/
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oneWay:
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{
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type: Boolean
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,set: function (x)
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{
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this._oneWay = x;
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}
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,get: function ()
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{
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return this._oneWay;
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}
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}
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}
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,_columnName: null
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,_set: null
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,_setLock: false
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,_oneWay: false
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,_setValue: null
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,initialize: function (props)
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{
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this.parent (props);
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this.on ('changed', this.onChange, this);
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}
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,refresh: function ()
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{
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if (this._set)
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this.onSetChange ();
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}
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,onSetChange: function ()
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{
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this._setLock = true;
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var formValue = this._set.get (this._columnName);
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this.value = formValue;
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this._setLock = false;
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}
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,onChange: function ()
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{
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if (!this._setLock && this._columnName && !this.oneWay)
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this._set.set (this._columnName, this._value);
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}
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});
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