1 files changed, 161 insertions, 0 deletions
diff --git a/examples/demos/documentviewer/abstractviewer.cpp b/examples/demos/documentviewer/abstractviewer.cpp
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+++ b/examples/demos/documentviewer/abstractviewer.cpp
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+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "abstractviewer.h"
+#include <QAction>
+#include <QTabWidget>
+#include <QToolBar>
+#include <QMenu>
+#include <QMenuBar>
+#include <QScrollArea>
+#include <QStatusBar>
+#include <QMessageBox>
+#include <QSettings>
+#include <QApplication>
+
+#if defined(QT_ABSTRACTVIEWER_PRINTSUPPORT)
+#include <QPrintDialog>
+#endif // QT_ABSTRACTVIEWER_PRINTSUPPORT
+
+AbstractViewer::AbstractViewer(QFile *file, QWidget *widget, QMainWindow *mainWindow) :
+    m_file(file),
+    m_widget(widget)
+{
+    Q_ASSERT(widget);
+    Q_ASSERT(mainWindow);
+    m_uiAssets.mainWindow = mainWindow;
+}
+
+AbstractViewer::~AbstractViewer()
+{
+    // delete all objects created by the viewer which need to be displayed
+    // and therefore parented on MainWindow
+    delete m_widget;
+    qDeleteAll(m_menus);
+    qDeleteAll(m_toolBars);
+}
+
+void AbstractViewer::statusMessage(const QString &message, const QString &type, int timeout)
+{
+    const QString msg = viewerName() + (type.isEmpty() ? ": " : "/" + type + ": ") + message;
+    emit showMessage(msg, timeout);
+}
+
+QToolBar *AbstractViewer::addToolBar(const QString &title)
+{
+    auto *bar = mainWindow()->addToolBar(title);
+    bar->setObjectName(QString(title).replace(" ", ""));
+    m_toolBars.append(bar);
+    return bar;
+}
+
+QMenu *AbstractViewer::addMenu(const QString &title)
+{
+    QMenu *menu = new QMenu(title, menuBar());
+    menuBar()->insertMenu(m_uiAssets.help, menu);
+    m_menus.append(menu);
+    return menu;
+}
+
+QMenu *AbstractViewer::fileMenu()
+{
+    static constexpr QLatin1StringView name = QLatin1StringView("qtFileMenu");
+    static QMenu *fileMenu = nullptr;
+    if (fileMenu)
+        return fileMenu;
+
+    QList<QMenu *> menus = mainWindow()->findChildren<QMenu *>();
+    for (auto *menu : menus) {
+        if (menu->objectName() == name) {
+            fileMenu = menu;
+            return fileMenu;
+        }
+    }
+    fileMenu = addMenu(tr("&File"));
+    fileMenu->setObjectName(name);
+    return fileMenu;
+}
+
+void AbstractViewer::print()
+{
+#ifdef QT_ABSTRACTVIEWER_PRINTSUPPORT
+    static const QString type = tr("Printing");
+    if (!hasContent()) {
+        statusMessage(tr("No content to print."), type);
+        return;
+    }
+
+    QPrinter printer(QPrinter::HighResolution);
+    QPrintDialog dlg(&printer, mainWindow());
+    dlg.setWindowTitle(tr("Print Document"));
+    if (dlg.exec() == QDialog::Accepted) {
+        printDocument(&printer);
+    } else {
+        statusMessage(tr("Printing canceled!"), type);
+        return;
+    }
+
+    const QPrinter::PrinterState state = printer.printerState();
+    QString message = viewerName() + " :";
+    switch (state) {
+    case QPrinter::PrinterState::Aborted:
+        message += tr("Printing aborted.");
+        break;
+    case QPrinter::PrinterState::Active:
+        message += tr("Printing active.");
+        break;
+    case QPrinter::PrinterState::Idle:
+        message += tr("Printing completed.");
+        break;
+    case QPrinter::PrinterState::Error:
+        message += tr("Printing error.");
+        break;
+    }
+    statusMessage(message, type);
+#else
+    statusMessage(tr("Printing not supported!"));
+#endif
+}
+
+/*!
+   \brief AbstractViewer::setPrintingEnabled
+   Enables / disables printing.
+   If printing is not supported or the viewer has no content to display,
+   \param enabled is overridden with \c false;
+   The signal printingEnabledChanged is emitted if the status has changed.
+ */
+void AbstractViewer::maybeSetPrintingEnabled(bool enabled)
+{
+#ifndef QT_ABSTRACTVIEWER_PRINTSUPPORT
+    enabled = false;
+#else
+    if (!hasContent())
+        enabled = false;
+#endif
+
+    if (enabled == m_printingEnabled)
+        return;
+
+    m_printingEnabled = enabled;
+    emit printingEnabledChanged(enabled);
+}
+
+void AbstractViewer::initViewer(QAction *back, QAction *forward, QAction *help, QTabWidget *tabs)
+{
+    // Viewers need back & forward buttons and a tab widget.
+    Q_ASSERT(back);
+    Q_ASSERT(forward);
+    Q_ASSERT(tabs);
+    Q_ASSERT(help);
+
+    m_uiAssets.back = back;
+    m_uiAssets.forward = forward;
+    m_uiAssets.help = help;
+    m_uiAssets.tabs = tabs;
+
+    // Tabs can be populated individually by the viewer, if it supports overview
+    tabs->clear();
+    tabs->setVisible(supportsOverview());
+
+    emit uiInitialized();
+}