Refactor ActionShortcutEdit into MultiKeyEdit

include/ui/multikeyedit.h

@@ -0,0 +1,50 @@
+#ifndef MULTIKEYEDIT_H
+#define MULTIKEYEDIT_H
+
+#include <QWidget>
+#include <QKeySequenceEdit>
+
+class QLineEdit;
+
+
+// A collection of QKeySequenceEdit's laid out horizontally.
+class MultiKeyEdit : public QWidget
+{
+    Q_OBJECT
+
+public:
+    MultiKeyEdit(QWidget *parent = nullptr, int fieldCount = 2);
+
+    bool eventFilter(QObject *watched, QEvent *event) override;
+
+    int fieldCount() const;
+    void setFieldCount(int count);
+    QList<QKeySequence> keySequences() const;
+    bool removeOne(const QKeySequence &keySequence);
+    bool contains(const QKeySequence &keySequence) const;
+    void setContextMenuPolicy(Qt::ContextMenuPolicy policy);
+
+public slots:
+    void clear();
+    void setKeySequences(const QList<QKeySequence> &keySequences);
+    void addKeySequence(const QKeySequence &keySequence);
+
+signals:
+    void keySequenceChanged(const QKeySequence &keySequence);
+    void editingFinished();
+    void customContextMenuRequested(const QPoint &pos);
+
+private:
+    QVector<QKeySequenceEdit *> keySequenceEdit_vec;
+    QList<QKeySequence> keySequence_list;   // Used to track changes
+
+    void addNewKeySequenceEdit();
+    void alignKeySequencesLeft();
+    void setFocusToLastNonEmptyKeySequenceEdit();
+
+private slots:
+    void onEditingFinished();
+    void showDefaultContextMenu(QLineEdit *lineEdit, const QPoint &pos);
+};
+
+#endif // MULTIKEYEDIT_H