Introduce StandardShortcutWatcher to watch for runtime changes

Currently an application needs to be restarted before it can see
any changes made to the standard shortcut configuration. To notify
about changes a new class is introduced that looks for those
changes using KConfigWatcher and also updates the global map.
CCBUG:426656

1 files changed, 54 insertions, 0 deletions

diff --git a/src/gui/kstandardshortcutwatcher.h b/src/gui/kstandardshortcutwatcher.h
new file mode 100644
index 00000000..64c6d3d4
--- /dev/null
+++ b/src/gui/kstandardshortcutwatcher.h
@@ -0,0 +1,54 @@
+/*
+    SPDX-FileCopyrightText: 2022 David Redondo <kde@david-redondo.de>
+
+    SPDX-License-Identifier: LGPL-2.0-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
+*/
+
+#ifndef KSTANDARDSHORTCUTWATCHER_H
+#define KSTANDARDSHORTCUTWATCHER_H
+
+#include "kstandardshortcut.h"
+
+#include <QObject>
+
+#include <memory>
+
+#include <kconfiggui_export.h>
+
+namespace KStandardShortcut
+{
+class StandardShortcutWatcherPrivate;
+
+/**
+ * Watches for changes made to standard shortcuts and notifies about those changes.
+ * @see KStandardShortcut::shortcutWatcher
+ * @since 5.91
+ */
+class KCONFIGGUI_EXPORT StandardShortcutWatcher : public QObject
+{
+    Q_OBJECT
+public:
+    ~StandardShortcutWatcher();
+Q_SIGNALS:
+    /**
+     * The standardshortcut @p id was changed to @p shortcut
+     */
+    void shortcutChanged(KStandardShortcut::StandardShortcut id, const QList<QKeySequence> &shortcut);
+
+private:
+    explicit StandardShortcutWatcher(QObject *parent = nullptr);
+    friend StandardShortcutWatcher *shortcutWatcher();
+    std::unique_ptr<StandardShortcutWatcherPrivate> d;
+};
+
+/**
+ * Returns the global KStandardShortcutWatcher instance of this program.
+ * In addition to the notifying about changes it also keeps the information returned by the
+ * functions in @p KStandardShortcut up to date.
+ * The object is created by the first call to this function.
+ * @since 5.91
+ */
+KCONFIGGUI_EXPORT StandardShortcutWatcher *shortcutWatcher();
+}
+
+#endif