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radio.js
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radio.js
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/*\
title: $:/core/modules/widgets/radio.js
type: application/javascript
module-type: widget
Set a field or index at a given tiddler via radio buttons
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
var Widget = require("$:/core/modules/widgets/widget.js").widget;
var RadioWidget = function(parseTreeNode,options) {
this.initialise(parseTreeNode,options);
};
/*
Inherit from the base widget class
*/
RadioWidget.prototype = new Widget();
/*
Render this widget into the DOM
*/
RadioWidget.prototype.render = function(parent,nextSibling) {
// Save the parent dom node
this.parentDomNode = parent;
// Compute our attributes
this.computeAttributes();
// Execute our logic
this.execute();
var isChecked = this.getValue() === this.radioValue;
// Create our elements
this.labelDomNode = this.document.createElement("label");
this.labelDomNode.setAttribute("class",
"tc-radio " + this.radioClass + (isChecked ? " tc-radio-selected" : "")
);
this.inputDomNode = this.document.createElement("input");
this.inputDomNode.setAttribute("type","radio");
this.assignAttributes(this.inputDomNode,{
sourcePrefix: "data-",
destPrefix: "data-"
});
if(isChecked) {
this.inputDomNode.checked = true;
}
if(this.isDisabled === "yes") {
this.inputDomNode.setAttribute("disabled",true);
}
this.labelDomNode.appendChild(this.inputDomNode);
this.spanDomNode = this.document.createElement("span");
this.labelDomNode.appendChild(this.spanDomNode);
// Add a click event handler
$tw.utils.addEventListeners(this.inputDomNode,[
{name: "change", handlerObject: this, handlerMethod: "handleChangeEvent"}
]);
// Insert the label into the DOM and render any children
parent.insertBefore(this.labelDomNode,nextSibling);
this.renderChildren(this.spanDomNode,null);
this.domNodes.push(this.labelDomNode);
};
RadioWidget.prototype.getValue = function() {
var value,
tiddler = this.wiki.getTiddler(this.radioTitle);
if(tiddler) {
if(this.radioIndex) {
value = this.wiki.extractTiddlerDataItem(this.radioTitle,this.radioIndex,this.radioDefault);
} else {
value = tiddler.getFieldString(this.radioField,this.radioDefault);
}
} else {
value = this.radioDefault;
}
return value;
};
RadioWidget.prototype.setValue = function() {
if(this.radioIndex) {
this.wiki.setText(this.radioTitle,"",this.radioIndex,this.radioValue);
} else {
var tiddler = this.wiki.getTiddler(this.radioTitle),
addition = {};
addition[this.radioField] = this.radioValue;
this.wiki.addTiddler(new $tw.Tiddler(this.wiki.getCreationFields(),{title: this.radioTitle},tiddler,addition,this.wiki.getModificationFields()));
}
};
RadioWidget.prototype.handleChangeEvent = function(event) {
if(this.inputDomNode.checked) {
this.setValue();
}
// Trigger actions
if(this.radioActions) {
this.invokeActionString(this.radioActions,this,event,{"actionValue": this.radioValue});
}
};
/*
Compute the internal state of the widget
*/
RadioWidget.prototype.execute = function() {
// Get the parameters from the attributes
this.radioTitle = this.getAttribute("tiddler",this.getVariable("currentTiddler"));
this.radioField = this.getAttribute("field","text");
this.radioIndex = this.getAttribute("index");
this.radioValue = this.getAttribute("value");
this.radioClass = this.getAttribute("class","");
this.radioDefault = this.getAttribute("default");
this.isDisabled = this.getAttribute("disabled","no");
this.radioActions = this.getAttribute("actions","");
// Make the child widgets
this.makeChildWidgets();
};
/*
Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
*/
RadioWidget.prototype.refresh = function(changedTiddlers) {
var changedAttributes = this.computeAttributes();
if(($tw.utils.count(changedAttributes) > 0)) {
this.refreshSelf();
return true;
} else if(changedTiddlers[this.radioTitle]) {
this.inputDomNode.checked = this.getValue() === this.radioValue;
$tw.utils.toggleClass(this.labelDomNode,"tc-radio-selected",this.inputDomNode.checked);
return this.refreshChildren(changedTiddlers);
} else {
return this.refreshChildren(changedTiddlers);
}
};
exports.radio = RadioWidget;
})();