Add Lesson 5 Task 4

Lesson_5/Task_4/.gitignore

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+# This file is used to ignore files which are generated
+# ----------------------------------------------------------------------------
+
+*~
+*.autosave
+*.a
+*.core
+*.moc
+*.o
+*.obj
+*.orig
+*.rej
+*.so
+*.so.*
+*_pch.h.cpp
+*_resource.rc
+*.qm
+.#*
+*.*#
+core
+!core/
+tags
+.DS_Store
+.directory
+*.debug
+Makefile*
+*.prl
+*.app
+moc_*.cpp
+ui_*.h
+qrc_*.cpp
+Thumbs.db
+*.res
+*.rc
+/.qmake.cache
+/.qmake.stash
+
+# qtcreator generated files
+*.pro.user*
+CMakeLists.txt.user*
+
+# xemacs temporary files
+*.flc
+
+# Vim temporary files
+.*.swp
+
+# Visual Studio generated files
+*.ib_pdb_index
+*.idb
+*.ilk
+*.pdb
+*.sln
+*.suo
+*.vcproj
+*vcproj.*.*.user
+*.ncb
+*.sdf
+*.opensdf
+*.vcxproj
+*vcxproj.*
+
+# MinGW generated files
+*.Debug
+*.Release
+
+# Python byte code
+*.pyc
+
+# Binaries
+# --------
+*.dll
+*.exe
+

Lesson_5/Task_4/Task_4.pro

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+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+CONFIG += c++17
+
+# You can make your code fail to compile if it uses deprecated APIs.
+# In order to do so, uncomment the following line.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += \
+    main.cpp \
+    wordfilter.cpp
+
+HEADERS += \
+    wordfilter.h
+
+FORMS += \
+    wordfilter.ui
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

Lesson_5/Task_4/main.cpp

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+#include "wordfilter.h"
+
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    Wordfilter w;
+    w.show();
+    return a.exec();
+}

Lesson_5/Task_4/wordfilter.cpp

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+#include "wordfilter.h"
+#include "ui_wordfilter.h"
+
+Wordfilter::Wordfilter(QWidget *parent)
+    : QMainWindow(parent)
+    , ui(new Ui::Wordfilter)
+{
+    ui->setupUi(this);
+    connect(ui->b_select, &QPushButton::clicked, this, &Wordfilter::selectFile);
+    connect(ui->b_filter, &QPushButton::clicked, this, &Wordfilter::filter);
+}
+
+Wordfilter::~Wordfilter()
+{
+    delete ui;
+}
+
+void Wordfilter::selectFile()
+{
+    QString fileName = QFileDialog::getOpenFileName(this, "Open word list", "", "Text files (*.txt);;All Files (*)");
+
+    if (fileName.isEmpty())
+        return;
+
+    QFile file(fileName);
+
+    if (file.open(QIODevice::ReadOnly)) {
+        QStringList words;
+        QTextStream in(&file);
+
+        while (!in.atEnd())
+            words.append(in.readLine());
+
+        setWords(words);
+    }
+
+    file.close();
+}
+
+void Wordfilter::filter()
+{
+    QString text = ui->e_text->toPlainText();
+    for (QString word : m_words)
+        text.replace(word, "[filtered]");
+    ui->e_text->setText(text);
+}

Lesson_5/Task_4/wordfilter.h

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+#ifndef WORDFILTER_H
+#define WORDFILTER_H
+
+#include <QMainWindow>
+#include <QFileDialog>
+#include <QMessageBox>
+#include <QTextStream>
+
+QT_BEGIN_NAMESPACE
+namespace Ui {
+class Wordfilter;
+}
+QT_END_NAMESPACE
+
+class Wordfilter : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    Wordfilter(QWidget *parent = nullptr);
+    ~Wordfilter();
+    QStringList getWords() { return m_words; }
+    void setWords(QStringList words) { m_words = words; }
+
+private:
+    Ui::Wordfilter *ui;
+    void selectFile();
+    void filter();
+    QStringList m_words;
+};
+#endif // WORDFILTER_H

Lesson_5/Task_4/wordfilter.ui

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+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Wordfilter</class>
+ <widget class="QMainWindow" name="Wordfilter">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>800</width>
+    <height>600</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Wordfilter</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QVBoxLayout" name="verticalLayout_2">
+    <item>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QLabel" name="label">
+        <property name="text">
+         <string>Filtered words file:</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QPushButton" name="b_select">
+        <property name="text">
+         <string>Select</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+    <item>
+     <layout class="QVBoxLayout" name="verticalLayout">
+      <item>
+       <widget class="QTextEdit" name="e_text"/>
+      </item>
+      <item>
+       <widget class="QPushButton" name="b_filter">
+        <property name="text">
+         <string>Filter</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>800</width>
+     <height>25</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>