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tv.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Televisión</title>
<style>
#tv {
width: 640px;
height: 480px;
border: 10px solid black;
background-color: black;
position: relative;
}
#screen {
width: 580px;
height: 360px;
background-color: gray;
position: absolute;
top: 50px;
left: 30px;
}
#controls {
margin-top: 10px;
display: flex;
justify-content: space-between;
}
#volume {
display: flex;
align-items: center;
}
#volume-label {
margin-right: 10px;
}
#volume-slider {
width: 100px;
margin-right: 10px;
}
#buttons {
display: flex;
justify-content: space-between;
width: 150px;
}
.button {
width: 40px;
height: 40px;
border-radius: 50%;
background-color: white;
display: flex;
justify-content: center;
align-items: center;
font-size: 20px;
cursor: pointer;
}
#record {
background-color: red;
}
</style>
</head>
<body>
<div id="tv">
<div id="screen">Sintonizando 87.5 MHz</div>
<div id="controls">
<div id="volume">
<label id="volumeLabel">Vol:</label>
<input id="volumeSlider" max="100" min="0" type="range" value="50">
</div>
<div id="buttons">
<div class="button" id="mute">M</div>
<div class="button" id="record">R</div>
<div class="button" id="program">P</div>
</div>
</div>
</div>
<div>
<label>Tipo de señal</label>
<select id="signalType">
<option value="analog">Analógica</option>
<option value="digital">Digital</option>
<option value="am">Onda media (AM)</option>
<option value="fm">Frecuencia modulada (FM)</option>
</select>
</div>
<div>
<label>Sintonizador</label>
<input id="tuner" max="108" min="87.5" step="0.01" type="range" value="87.5">
<label id="frequencyLabel">87.5 MHz</label>
<button id="search">Buscar canales</button>
</div>
<script src="tv.js"></script>
<script>
let decoder;
// Obtener elementos del DOM
let screen;
let signalType;
let tuner;
let frequencyLabel;
let searchButton;
let volumeSlider;
let muteButton;
let recordButton;
let programButton;
let isRecording;
let type;
let frequency;
let volume;
window.addEventListener('load', function() {
// Crear decodificador por defecto
decoder = new AnalogDecoder();
// Obtener elementos del DOM
screen = document.getElementById('screen');
signalType = document.getElementById('signalType');
tuner = document.getElementById('tuner');
frequencyLabel = document.getElementById('frequencyLabel');
searchButton = document.getElementById('search');
volumeSlider = document.getElementById('volumeSlider');
muteButton = document.getElementById('mute');
recordButton = document.getElementById('record');
programButton = document.getElementById('program');
isRecording = false;
// Actualizar el decodificador según el tipo de señal seleccionado
signalType.addEventListener('change', function() {
console.log('Se ha cambiado la selección del tipo de señal ', signalType.value);
type = signalType.value;
switch (type) {
case 'analog':
tuner.setAttribute('min', '87.5');
tuner.setAttribute('max', '108');
tuner.setAttribute('step', '0.01');
tuner.value = '87.5';
frequencyLabel.innerText = '87.5 MHz';
screen.innerText = 'Sintonizando 87.5 MHz';
break;
case 'digital':
tuner.setAttribute('min', '470');
tuner.setAttribute('max', '862');
tuner.setAttribute('step', '1');
tuner.value = '470';
frequencyLabel.innerText = '470 MHz';
screen.innerText = 'Sintonizando 470 MHz';
break;
case 'am':
tuner.setAttribute('min', '540');
tuner.setAttribute('max', '1600');
tuner.setAttribute('step', '10');
tuner.value = '540';
frequencyLabel.innerText = '540 kHz';
screen.innerText = 'Sintonizando 540 kHz';
break;
case 'fm':
tuner.setAttribute('min', '87.5');
tuner.setAttribute('max', '108');
tuner.setAttribute('step', '0.1');
tuner.value = '87.5';
frequencyLabel.innerText = '87.5 MHz';
screen.innerText = 'Sintonizando 87.5 MHz';
break;
default:
tuner.setAttribute('min', '87.5');
tuner.setAttribute('max', '108');
tuner.setAttribute('step', '0.01');
tuner.value = '87.5';
frequencyLabel.innerText = '87.5 MHz';
screen.innerText = 'Sintonizando 87.5 MHz';
}
if (type === 'analog') {
decoder = new AnalogDecoder();
tuner.min = 87.5;
tuner.max = 108;
tuner.step = 0.01;
} else if (type === 'digital') {
decoder = new DigitalDecoder();
tuner.min = 470;
tuner.max = 862;
tuner.step = 1;
} else if (type === 'am') {
decoder = new AMDecoder();
tuner.min = 530;
tuner.max = 1700;
tuner.step = 0.1;
} else if (type === 'fm') {
decoder = new FMDecoder();
tuner.min = 88;
tuner.max = 108;
tuner.step = 0.1;
}
});
// Actualizar la frecuencia en el decodificador cuando se cambia el valor del sintonizador
tuner.addEventListener('input', function() {
frequency = parseFloat(tuner.value);
decoder.setFrequency(frequency);
frequencyLabel.innerHTML = frequency.toFixed(1) + ' MHz';
screen.innerHTML = 'Sintonizando ' + frequency.toFixed(1) + ' MHz';
});
// Actualizar el valor del volumen en la etiqueta de la pantalla cuando se cambia el control deslizante
volumeSlider.addEventListener('input', function() {
volume = volumeSlider.value;
screen.innerHTML = 'Vol: ' + volume + '<br>Sintonizando ' + tuner.value + ' MHz';
});
// Silenciar la televisión cuando se hace clic en el botón de silencio
muteButton.addEventListener('click', function() {
volumeSlider.value = 0;
screen.innerHTML = 'MUTE<br>Sintonizando ' + tuner.value + ' MHz';
});
// Iniciar o detener la grabación cuando se hace clic en el botón de grabación
recordButton.addEventListener('click', function() {
isRecording = !isRecording;
if (isRecording) {
recordButton.style.backgroundColor = 'green';
screen.innerHTML += '<br>GRABANDO';
} else {
recordButton.style.backgroundColor = 'white';
screen.innerHTML = screen.innerHTML.replace('<br>GRABANDO', '');
}
});
// Mostrar el menú de programación cuando se hace clic en el botón de programación
programButton.addEventListener('click', function() {
alert('Programación no disponible');
});
// Buscar canales disponibles cuando se hace clic en el botón de búsqueda
searchButton.addEventListener('click', function() {
alert('Búsqueda de canales no disponible');
});
});
</script>
</body>
</html>