playaround with KActionMenu

editorviewhelper.h

@@ -0,0 +1,46 @@
+#pragma once
+
+#include <KActionMenu>
+#include <QMenu>
+
+class QsciLexer;
+class LexerGroupActionMenu : public KActionMenu
+{
+    Q_OBJECT
+public:
+    enum LanguageGroup {
+        LANG_GRP_B,
+        LANG_GRP_C,
+        LANG_GRP_D,
+        LANG_GRP_H,
+        LANG_GRP_J,
+        LANG_GRP_L,
+        LANG_GRP_M,
+        LANG_GRP_P,
+        LANG_GRP_R,
+        LANG_GRP_X,
+        LANG_GRP_Y,
+        LANG_GRP_LAST = LANG_GRP_Y
+    };
+    LexerGroupActionMenu(const QString &text, enum LanguageGroup grp, QObject *parent)
+        : KActionMenu(text, parent)
+    {
+        m_group = nullptr;
+        m_languageGroup = grp;
+        connect(menu(), &QMenu::aboutToShow, this, &LexerGroupActionMenu::slotAboutToShow);
+        setPopupMode(QToolButton::InstantPopup);
+    }
+
+    static QString groupName(enum LanguageGroup grp);
+    static QsciLexer * createLexerByLanguage(const QString & languageName);
+
+signals:
+    void lexerSelected(const QString lexerName);
+
+private:
+    QActionGroup *m_group;
+    enum LanguageGroup m_languageGroup;
+
+public:
+    void slotAboutToShow();
+};