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