Issue #134: Add search bar for actions

Pdf4QtViewer/pdfactioncombobox.h

@@ -0,0 +1,64 @@
+//    Copyright (C) 2023 Jakub Melka
+//
+//    This file is part of PDF4QT.
+//
+//    PDF4QT is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    with the written consent of the copyright owner, any later version.
+//
+//    PDF4QT is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDF4QT.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef PDFACTIONCOMBOBOX_H
+#define PDFACTIONCOMBOBOX_H
+
+#include "pdfwidgetsglobal.h"
+
+#include <QAction>
+#include <QComboBox>
+
+class QStandardItemModel;
+class QSortFilterProxyModel;
+
+namespace pdfviewer
+{
+
+class PDFActionComboBox : public QComboBox
+{
+    Q_OBJECT
+
+private:
+    using BaseClass = QComboBox;
+
+public:
+    PDFActionComboBox(QWidget* parent);
+
+    virtual QSize sizeHint() const override;
+    virtual QSize minimumSizeHint() const override;
+
+    void addQuickFindAction(QAction* action);
+
+private:
+    static constexpr int DEFAULT_WIDTH = 220;
+
+    void onActionChanged();
+    void onActionActivated(int index);
+    void onEditTextChanged(const QString& text);
+
+    void updateAction(QAction* action);
+    int findAction(QAction* action);
+
+    std::vector<QAction*> m_actions;
+    QStandardItemModel* m_model;
+    QSortFilterProxyModel* m_proxyModel;
+};
+
+}   // namespace pdfviewer
+
+#endif // PDFACTIONCOMBOBOX_H