add a clear action to the window

src/TextEditor/CMakeLists.txt

@@ -11,3 +11,6 @@ target_link_libraries(TextEditor
 	KF5::XmlGui
 	KF5::TextWidgets
 )
+
+install(TARGETS TextEditor ${KDE_INSTALL_TARGETS_DEFAULT_ARGS})
+install(FILES TextEditorUI.rc DESTINATION ${KDE_INSTALL_KXMLGUI5DIR}/TextEditor)

src/TextEditor/MainWindow.cc

@@ -1,4 +1,9 @@
 #include "MainWindow.hh"
+#include <KLocalizedString>
+#include <QAction>
+#include <KActionCollection>
+#include <KStandardAction>
+#include <QApplication>
 
 MainWindow::MainWindow(QWidget* parent)
 	: KXmlGuiWindow(parent)
@@ -8,5 +13,19 @@ MainWindow::MainWindow(QWidget* parent)
 	// set the central widget to be the TextArea
 	setCentralWidget(textArea);
 	// setup the GUI
-	setupGUI();
+	setupActions();
+}
+
+void MainWindow::setupActions()
+{
+	QAction* clearAction = new QAction(this);
+	clearAction->setText(i18n("&Clear"));
+	clearAction->setIcon(QIcon::fromTheme("document-new"));
+	actionCollection()->addAction("clear", clearAction);
+	actionCollection()->setDefaultShortcut(clearAction, Qt::CTRL + Qt::Key_W);
+	connect(clearAction, &QAction::triggered, textArea, &KTextEdit::clear);
+
+	KStandardAction::quit(qApp, &QCoreApplication::quit, actionCollection());
+
+	setupGUI(Default, "TextEditorUI.rc");
 }

src/TextEditor/MainWindow.hh

@@ -10,6 +10,7 @@ public:
 
 private:
 	KTextEdit* textArea;
+	void setupActions();
 };
 
 #endif

src/TextEditor/TextEditorUI.rc

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gui name="TextEditor" version="1" xmlns="https://www.kde.org/standards/kxmlgui/1.0"
+	xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="https://www.kde.org/standards/kxmlgui/1.0/kxmlgui.xsd">
+	<MenuBar>
+		<Menu name="file">
+			<Action name="clear" />
+		</Menu>
+	</MenuBar>
+	<ToolBar name="mainToolBar">
+		<text>Main Toolbar</text>
+		<Action name="clear" />
+	</ToolBar>
+</gui>

src/TextEditor/main.cc

@@ -7,11 +7,11 @@
 int main(int argc, char* argv[])
 {
 	QApplication app(argc, argv);
-	KLocalizedString::setApplicationDomain("MainWindow");
+	KLocalizedString::setApplicationDomain("TextEditor");
 
 	KAboutData aboutData(
 		// Internal Name
-		QStringLiteral("MainWindow"),
+		QStringLiteral("TextEditor"),
 		// Name
 		i18n("Text Editor"),
 		// Version Number