1 files changed, 101 insertions, 0 deletions
diff --git a/examples/demos/documentviewer/abstractviewer.h b/examples/demos/documentviewer/abstractviewer.h
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+++ b/examples/demos/documentviewer/abstractviewer.h
@@ -0,0 +1,101 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef ABSTRACTVIEWER_H
+#define ABSTRACTVIEWER_H
+
+#include <QWidget>
+#include <QMainWindow>
+#include <QFileInfo>
+
+#if defined(QT_PRINTSUPPORT_LIB)
+#include <QtPrintSupport/qtprintsupportglobal.h>
+#if QT_CONFIG(printer)
+#if QT_CONFIG(printdialog)
+#define QT_ABSTRACTVIEWER_PRINTSUPPORT
+#include <QPrinter>
+#endif // QT_CONFIG(printdialog)
+#endif // QT_CONFIG(printer)
+#endif // QT_PRINTSUPPORT_LIB
+
+class QToolBar;
+class QTabWidget;
+class QScrollArea;
+class QStatusBar;
+class AbstractViewer : public QObject
+{
+    Q_OBJECT
+
+protected:
+    explicit AbstractViewer(QFile *file, QWidget *widget, QMainWindow *mainWindow);
+
+public:
+    virtual ~AbstractViewer();
+
+    void initViewer(QAction *back, QAction *forward, QAction *help, QTabWidget *tabs);
+    virtual bool isModified() const { return false; }
+    virtual bool saveDocument() { return false; }
+    virtual bool saveDocumentAs() { return false; }
+    virtual QString viewerName() const = 0;
+    virtual bool supportsOverview() const { return false; }
+    virtual QByteArray saveState() const = 0;
+    virtual bool restoreState(QByteArray &) = 0;
+    virtual bool hasContent() const { return false; }
+    bool isEmpty() const { return !hasContent(); }
+    bool isPrintingEnabled() const { return m_printingEnabled; }
+
+    QList<QAction *> actions() const { return m_actions; }
+    QWidget *widget() const { return m_widget; }
+    QList<QMenu *> menus() const { return m_menus; }
+
+#ifdef QT_ABSTRACTVIEWER_PRINTSUPPORT
+protected:
+    virtual void printDocument(QPrinter *) const {};
+#endif
+
+signals:
+    void uiInitialized();
+    void printingEnabledChanged(bool enabled);
+    void showMessage(const QString &message, int timeout = 8000);
+    void documentLoaded(const QString &fileName);
+
+public slots:
+    void print();
+
+protected:
+
+    struct UiAssets {
+        QMainWindow *mainWindow = nullptr;
+        QAction *back = nullptr;
+        QAction *forward = nullptr;
+        QAction *help = nullptr;
+        QTabWidget *tabs = nullptr;
+    } m_uiAssets;
+
+    void statusMessage(const QString &message, const QString &type = QString(), int timeout = 8000);
+    QToolBar *addToolBar(const QString &);
+    QMenu *addMenu(const QString &);
+    QMenu *fileMenu();
+    QMainWindow *mainWindow() const { return m_uiAssets.mainWindow; }
+    QStatusBar *statusBar() const { return mainWindow()->statusBar(); }
+    QMenuBar *menuBar() const { return mainWindow()->menuBar(); }
+
+    std::unique_ptr<QFile> m_file;
+    QList<QAction *> m_actions;
+    QWidget *m_widget;
+
+protected slots:
+    void maybeSetPrintingEnabled(bool enabled);
+    inline void maybeEnablePrinting() { return maybeSetPrintingEnabled(true); }
+    inline void disablePrinting() { return maybeSetPrintingEnabled(false); }
+
+private:
+    QList<QMenu *> m_menus;
+    QList<QToolBar *> m_toolBars;
+    bool m_printingEnabled = false;
+    int m_classId = -1;
+
+    static constexpr QLatin1StringView m_viewerName = QLatin1StringView("AbstractViewer");
+};
+
+#endif // ABSTRACTVIEWER_H