kopia lustrzana https://github.com/miklobit/TiddlyWiki5
115 wiersze
3.2 KiB
JavaScript
115 wiersze
3.2 KiB
JavaScript
/*\
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title: $:/core/modules/widgets/range.js
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type: application/javascript
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module-type: widget
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Range widget
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var Widget = require("$:/core/modules/widgets/widget.js").widget;
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var RangeWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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};
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/*
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Inherit from the base widget class
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*/
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RangeWidget.prototype = new Widget();
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/*
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Render this widget into the DOM
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*/
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RangeWidget.prototype.render = function(parent,nextSibling) {
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// Save the parent dom node
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this.parentDomNode = parent;
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// Compute our attributes
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this.computeAttributes();
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// Execute our logic
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this.execute();
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// Create our elements
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this.inputDomNode = this.document.createElement("input");
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this.inputDomNode.setAttribute("type","range");
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this.inputDomNode.setAttribute("class",this.elementClass);
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if(this.minValue){
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this.inputDomNode.setAttribute("min", this.minValue);
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}
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if(this.maxValue){
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this.inputDomNode.setAttribute("max", this.maxValue);
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}
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if(this.increment){
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this.inputDomNode.setAttribute("step", this.increment);
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}
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this.inputDomNode.value = this.getValue();
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// Add a click event handler
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$tw.utils.addEventListeners(this.inputDomNode,[
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{name: "input", handlerObject: this, handlerMethod: "handleChangeEvent"}
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]);
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// Insert the label into the DOM and render any children
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parent.insertBefore(this.inputDomNode,nextSibling);
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this.domNodes.push(this.inputDomNode);
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};
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RangeWidget.prototype.getValue = function() {
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var tiddler = this.wiki.getTiddler(this.tiddlerTitle),
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value = this.defaultValue;
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if(tiddler) {
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if($tw.utils.hop(tiddler.fields,this.tiddlerField)) {
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value = tiddler.fields[this.tiddlerField] || "";
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} else {
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value = this.defaultValue || "";
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}
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}
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return value;
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};
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RangeWidget.prototype.handleChangeEvent = function(event) {
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this.wiki.setText(this.tiddlerTitle ,this.tiddlerField, null,this.inputDomNode.value);
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};
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/*
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Compute the internal state of the widget
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*/
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RangeWidget.prototype.execute = function() {
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// Get the parameters from the attributes
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this.tiddlerTitle = this.getAttribute("tiddler",this.getVariable("currentTiddler"));
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this.tiddlerField = this.getAttribute("field");
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this.minValue = this.getAttribute("min");
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this.maxValue = this.getAttribute("max");
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this.increment = this.getAttribute("increment");
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this.defaultValue = this.getAttribute("default");
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this.elementClass = this.getAttribute("class","");
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// Make the child widgets
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this.makeChildWidgets();
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};
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/*
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Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
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*/
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RangeWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if(changedAttributes.tiddler || changedAttributes.field || changedAttributes['min'] || changedAttributes['max'] || changedAttributes['increment'] || changedAttributes["default"] || changedAttributes["class"]) {
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this.refreshSelf();
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return true;
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} else {
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var refreshed = false;
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if(changedTiddlers[this.tiddlerTitle]) {
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this.inputDomNode.checked = this.getValue();
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refreshed = true;
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}
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return this.refreshChildren(changedTiddlers) || refreshed;
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}
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};
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exports.range = RangeWidget;
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})();
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