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hedera-web-mindshore/js/htk/assistant.js

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3.0 KiB
JavaScript

var Widget = require('./widget');
var Step = require('./step');
var Toast = require('./toast');
/**
* A simple assistant with steps.
*/
module.exports = new Class({
Extends: Widget,
Tag: 'htk-assistant',
Properties: {
/**
* The current step index.
*/
step: {
type: Number,
set: function(x) {
this.setStep(x);
},
get: function() {
return this._stepIndex;
}
},
/**
* The current step name.
*/
stepName: {
type: String,
set: function(x) {
this.setStepByName(x);
},
get: function() {
return this._stepName;
}
},
/**
* The steps index.
*/
stepsIndex: {
type: Array,
set: function(x) {
this._stepsIndex = x;
this.setStep(this._stepIndex);
this.signalEmit('steps-change');
},
get: function() {
return this._stepsIndex;
}
},
/**
* The total number of steps in the assistant.
*/
stepCount: {
type: Number,
get: function() {
if (this._stepsIndex)
return this._stepsIndex.length;
return 0;
}
},
/**
* Function to call on every step change.
*/
stepFunc: {
type: Function,
value: null
},
/**
* Function to call on every step change.
*/
endFunc: {
type: Function,
value: null
},
},
_stepNode: null,
_stepIndex: 0,
_stepName: null,
steps: {},
initialize: function(props) {
var node = this.createRoot('div');
node.className = 'htk-assistant';
this.parent(props);
},
appendChild: function(step) {
if (!(step instanceof Step))
throw new Error('Invalid child for assistant');
this.node.appendChild(step.node);
this.steps[step.name] = step;
},
setStepByName: function(stepName) {
if (this._stepsIndex)
this.setStep(this._stepsIndex.indexOf(stepName));
},
setStep: function(stepIndex) {
if ((this.currentStep && stepIndex == this._stepIndex)
|| !this._stepsIndex
|| !(stepIndex >= -1 && stepIndex < this._stepsIndex.length))
return;
if (stepIndex > this._stepIndex) {
var validateIni = Math.max(this._stepIndex, 0);
try {
for (var i = validateIni; i < stepIndex; i++) {
var validateName = this._stepsIndex[i];
var validateStep = this.steps[validateName];
validateStep.validate();
}
} catch(e) {
Toast.showError(e.message);
if (i == this._stepIndex) return;
stepIndex = i;
}
}
var stepName = this._stepsIndex[stepIndex];
var step = this.steps[stepName];
var currentStep = this.currentStep;
if (currentStep)
currentStep.hide();
this._stepIndex = stepIndex;
this._stepName = stepName;
this.currentStep = step;
step.show();
this.signalEmit('step-change', stepIndex);
if (this.stepFunc)
this.stepFunc(step);
},
/**
* Moves the assistant to the previous step.
*/
movePrevious: function() {
this.setStep(this._stepIndex - 1);
},
/**
* Moves the assistant to the next step.
*/
moveNext: function() {
this.setStep(this._stepIndex + 1);
},
/**
* Ends the assistant. If defined, the stepFunc will be called.
*/
end: function() {
if (this.endFunc)
this.endFunc();
}
});