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==========================================================

PROJETO COMPLETO: Qt + Flask + HTML + CSS + JavaScript

==========================================================

DESCRIÇÃO:

- Janela Qt (PyQt5)

- Servidor Flask integrado

- Página Web dinâmica

- Leitura de ficheiros .txt

- Escolher caminhos

- Botões: Ligar / Desligar / Sair

- Menu com opções de edição

- Modo Professor (explicações no código)

==========================================================

======================

IMPORTS

======================

import sys import threading from flask import Flask, render_template_string, jsonify from PyQt5.QtWidgets import ( QApplication, QMainWindow, QPushButton, QFileDialog, QVBoxLayout, QWidget, QLabel, QLineEdit, QTextEdit, QAction )

======================

FLASK APP

======================

app = Flask(name)

Variável global para guardar o texto

texto_global = ""

======================

HTML DINÂMICO

======================

HTML_PAGE = """

<!DOCTYPE html><html>
<head>
    <title>Viewer Dinâmico</title>
    <style>
        body {
            font-family: Arial;
            background: #1e1e1e;
            color: white;
            text-align: center;
        }
        textarea {
            width: 80%;
            height: 300px;
            margin-top: 20px;
            background: #2e2e2e;
            color: #00ffcc;
            font-size: 16px;
        }
    </style>
</head>
<body>
    <h1>Modo Professor - Visualização Dinâmica</h1><textarea id="caixa"></textarea>

setInterval(atualizarTexto, 1000);
</script>

</body>
</html>
"""======================

ROTAS FLASK

======================

@app.route('/') def index(): return render_template_string(HTML_PAGE)

@app.route('/texto') def get_texto(): return jsonify({'texto': texto_global})

======================

THREAD FLASK

======================

def run_flask(): app.run(port=5000)

======================

JANELA QT

======================

class MainWindow(QMainWindow): def init(self): super().init()

self.setWindowTitle("Servidor Qt + Flask")
    self.setGeometry(100, 100, 600, 400)

# ======================
    # COMPONENTES
    # ======================
    self.label = QLabel("Caminho do ficheiro:")
    self.path_input = QLineEdit()

self.btn_abrir = QPushButton("Escolher TXT")
    self.btn_ligar = QPushButton("Ligar Servidor")
    self.btn_desligar = QPushButton("Desligar")
    self.btn_sair = QPushButton("Sair")

self.log = QTextEdit()

# ======================
    # LAYOUT
    # ======================
    layout = QVBoxLayout()
    layout.addWidget(self.label)
    layout.addWidget(self.path_input)
    layout.addWidget(self.btn_abrir)
    layout.addWidget(self.btn_ligar)
    layout.addWidget(self.btn_desligar)
    layout.addWidget(self.btn_sair)
    layout.addWidget(self.log)

container = QWidget()
    container.setLayout(layout)
    self.setCentralWidget(container)

# ======================
    # MENU
    # ======================
    menu = self.menuBar()
    file_menu = menu.addMenu("Ficheiro")

abrir_action = QAction("Abrir TXT", self

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