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/*
* Copyright (C) 2020 Luciano Iam <lucianito@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
import { Message } from '/shared/message.js';
export class Widget {
constructor (node, addr, html) {
this.node = node;
this.addr = addr;
const template = document.createElement('template');
template.innerHTML = html;
this.el = template.content.firstChild;
}
attach (parent, callback) {
parent.appendChild(this.el);
if (callback) {
this.callback = callback;
}
}
callback (value) {
// do nothing by default
}
get hash () {
return Message.hash(this.node, this.addr);
}
}
export class Switch extends Widget {
constructor (node, addr) {
super (node, addr, `<input type="checkbox" class="widget-switch">`);
this.el.addEventListener('input', (ev) => this.callback(this.value));
}
get value () {
return this.el.checked;
}
set value (val) {
this.el.checked = val;
}
}
export class Slider extends Widget {
constructor (node, addr, min, max, step) {
const html = `<input type="range" class="widget-slider"
min="${min}" max="${max}" step="${step}">`;
super(node, addr, html);
this.min = min;
this.max = max;
this.el.addEventListener('input', (ev) => this.callback(this.value));
}
get value () {
return parseFloat(this.el.value)
}
set value (val) {
this.el.value = val;
}
}
export class DiscreteSlider extends Slider {
constructor (node, addr, min, max) {
super(node, addr, min, max, 1);
}
}
export class ContinuousSlider extends Slider {
constructor (node, addr, min, max) {
super(node, addr, min, max, 0.001);
}
}
export class LogarithmicSlider extends ContinuousSlider {
constructor (node, addr, min, max) {
super(node, addr, 0, 1.0);
this.minVal = Math.log(min);
this.maxVal = Math.log(max);
this.scale = this.maxVal - this.minVal;
}
get value () {
return Math.exp(this.minVal + this.scale * super.value);
}
set value (val) {
this.el.value = (Math.log(val) - this.minVal) / this.scale;
}
}
export class StripPanSlider extends ContinuousSlider {
constructor (node, addr) {
super(node, addr, -1.0, 1.0);
}
}
export class StripGainSlider extends ContinuousSlider {
constructor (node, addr) {
super(node, addr, 0, 1.0)
this.minVal = -58.0;
this.maxVal = 6.0;
this.scale = (this.maxVal - this.minVal);
}
get value () {
return this.maxVal + Math.log10(super.value) * this.scale;
}
set value (val) {
this.el.value = Math.pow(10.0, (val - this.maxVal) / this.scale);
}
}
export class StripMeter extends Widget {
constructor (node, addr) {
super(node, addr, `<label></label>`);
}
set value (val) {
this.el.innerHTML = val == -Infinity ? '-∞' : `${Math.round(val)} dB`;
}
}
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