implement the rest of the basic text editor

src/TextEditor/CMakeLists.txt

@@ -1,6 +1,7 @@
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
 	XmlGui
 	TextWidgets
+	KIO
 )
 
 add_executable(TextEditor main.cc MainWindow.cc)
@@ -10,6 +11,7 @@ target_link_libraries(TextEditor
 	KF5::I18n
 	KF5::XmlGui
 	KF5::TextWidgets
+	KF5::KIOCore
 )
 
 install(TARGETS TextEditor ${KDE_INSTALL_TARGETS_DEFAULT_ARGS})

src/TextEditor/MainWindow.cc

@@ -1,12 +1,17 @@
 #include "MainWindow.hh"
-#include <KLocalizedString>
-#include <QAction>
 #include <KActionCollection>
+#include <KLocalizedString>
+#include <KMessageBox>
 #include <KStandardAction>
+#include <QAction>
 #include <QApplication>
+#include <QFileDialog>
+#include <QSaveFile>
+#include <QTextStream>
 
 MainWindow::MainWindow(QWidget* parent)
 	: KXmlGuiWindow(parent)
+	, fileName(QString())
 {
 	// setup the TextArea
 	textArea = new KTextEdit();
@@ -16,7 +21,7 @@ MainWindow::MainWindow(QWidget* parent)
 	setupActions();
 }
 
-void MainWindow::setupActions()
+void MainWindow::setupClearAction()
 {
 	QAction* clearAction = new QAction(this);
 	clearAction->setText(i18n("&Clear"));
@@ -24,8 +29,83 @@ void MainWindow::setupActions()
 	actionCollection()->addAction("clear", clearAction);
 	actionCollection()->setDefaultShortcut(clearAction, Qt::CTRL + Qt::Key_W);
 	connect(clearAction, &QAction::triggered, textArea, &KTextEdit::clear);
+}
+
+void MainWindow::setupActions()
+{
+	setupClearAction();
 
 	KStandardAction::quit(qApp, &QCoreApplication::quit, actionCollection());
+	KStandardAction::open(this, &MainWindow::openFile, actionCollection());
+	KStandardAction::save(this, &MainWindow::saveFile, actionCollection());
+	KStandardAction::saveAs(this, &MainWindow::saveFileAs, actionCollection());
+	KStandardAction::openNew(this, &MainWindow::newFile, actionCollection());
 
 	setupGUI(Default, "TextEditorUI.rc");
 }
+
+void MainWindow::saveFileToDisk(const QString& outputFileName)
+{
+	if (outputFileName.isNull())
+		return;
+
+	QSaveFile file(outputFileName);
+	// open the file as write only
+	file.open(QIODevice::WriteOnly);
+
+	QByteArray outputByteArray;
+	outputByteArray.append(textArea->toPlainText().toUtf8());
+
+	file.write(outputByteArray);
+	file.commit();
+
+	fileName = outputFileName;
+}
+
+void MainWindow::newFile()
+{
+	fileName.clear();
+	textArea->clear();
+}
+
+void MainWindow::openFile()
+{
+	const QUrl fileNameFromDialog = QFileDialog::getOpenFileUrl(this, i18n("Open File"));
+
+	if (fileNameFromDialog.isEmpty())
+		return;
+	KIO::Job* job = KIO::storedGet(fileNameFromDialog);
+	fileName = fileNameFromDialog.toLocalFile();
+
+	connect(job, &KJob::result, this, &MainWindow::downloadFinished);
+	job->exec();
+}
+
+void MainWindow::saveFile()
+{
+	if (!fileName.isEmpty()) {
+		saveFileToDisk(fileName);
+		return;
+	}
+
+	saveFileAs();
+}
+
+void MainWindow::saveFileAs()
+{
+	saveFileToDisk(QFileDialog::getSaveFileName(this, i18n("Save File As")));
+}
+
+void MainWindow::downloadFinished(KJob* job)
+{
+	if (job->error()) {
+		KMessageBox::error(this, job->errorString());
+		fileName.clear();
+		return;
+	}
+
+	const KIO::StoredTransferJob* storedJob = qobject_cast<KIO::StoredTransferJob*>(job);
+	if (storedJob) {
+		textArea->setPlainText(QTextStream(storedJob->data(), QIODevice::ReadOnly).readAll());
+	}
+}

src/TextEditor/MainWindow.hh

@@ -3,14 +3,29 @@
 
 #include <KTextEdit>
 #include <KXmlGuiWindow>
+#include <KIO/Job>
 
 class MainWindow : public KXmlGuiWindow {
+	Q_OBJECT
 public:
 	explicit MainWindow(QWidget* parent = nullptr);
 
 private:
-	KTextEdit* textArea;
 	void setupActions();
+	void saveFileToDisk(const QString& outputFileName);
+	void setupClearAction();
+
+private Q_SLOTS:
+	void newFile();
+	void openFile();
+	void saveFile();
+	void saveFileAs();
+
+	void downloadFinished(KJob *job);
+
+private:
+	KTextEdit* textArea;
+	QString fileName;
 };
 
 #endif

src/TextEditor/TextEditorUI.rc

@@ -6,6 +6,10 @@
 		<Menu name="file">
 			<Action name="clear" />
 		</Menu>
+		<Menu>
+			<text>Another Meownu</text>
+			<Action name="clear" />
+		</Menu>
 	</MenuBar>
 	<ToolBar name="mainToolBar">
 		<text>Main Toolbar</text>

src/TextEditor/main.cc

@@ -23,6 +23,7 @@ int main(int argc, char* argv[])
 		// Copyright Statement
 		i18n("2023"));
 
+	// Set the AboutData to the aboutData variable
 	KAboutData::setApplicationData(aboutData);
 
 	QCommandLineParser parser;