113 lines
1.8 KiB
JavaScript
113 lines
1.8 KiB
JavaScript
Db.Param = 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: Db.Form
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,set: function (x)
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{
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this.link ({_form: x},
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{
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'status-changed': this.onFormChange
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,'iter-changed': this.onIterChange
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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._form;
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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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,_form: null
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,_formLock: false
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,_columnIndex: -1
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,_oneWay: false
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,_formValue: 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._form)
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{
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this.onFormChange ();
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this.onIterChange ();
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}
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}
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,onFormChange: function ()
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{
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if (this._columnName != null)
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this._columnIndex = this._form.getColumnIndex (this._columnName);
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}
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,onIterChange: function ()
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{
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this._formLock = true;
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var formValue;
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if (this._columnIndex !== -1)
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formValue = this._form.getByIndex (this._columnIndex);
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else
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formValue = undefined;
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this.value = formValue;
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this._formLock = false;
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}
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,onChange: function ()
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{
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if (!this._formLock && this._columnIndex != -1 && !this.oneWay)
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this._form.setByIndex (this._columnIndex, this._value);
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}
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});
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