It is now possible to configure the help viewer font.

Task-number: 253365

src/plugins/help/generalsettingspage.h

@@ -0,0 +1,84 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://www.qtsoftware.com/contact.
+**
+**************************************************************************/
+
+#ifndef GENERALSETTINGSPAGE_H
+#define GENERALSETTINGSPAGE_H
+
+#include <QtGui/QWidget>
+#include <QtGui/QFontDatabase>
+
+#include <coreplugin/dialogs/ioptionspage.h>
+
+#include "ui_generalsettingspage.h"
+
+QT_FORWARD_DECLARE_CLASS(QFont)
+QT_FORWARD_DECLARE_CLASS(QHelpEngine)
+
+namespace Help {
+namespace Internal {
+
+class GeneralSettingsPage : public Core::IOptionsPage
+{
+    Q_OBJECT
+
+public:
+    GeneralSettingsPage(QHelpEngine *helpEngine);
+
+    QString id() const;
+    virtual QString trName() const;
+    QString category() const;
+    QString trCategory() const;
+
+    QWidget *createPage(QWidget *parent);
+    void apply();
+    void finish();
+
+signals:
+    void fontChanged();
+
+private:
+    void updateFontSize();
+    void updateFontStyle();
+    void updateFontFamily();
+    int closestPointSizeIndex(int desiredPointSize) const;
+
+private:
+    QWidget *m_currentPage;
+    QHelpEngine *m_helpEngine;
+
+    QFont font;
+    QFontDatabase fontDatabase;
+
+    Ui::GeneralSettingsPage m_ui;
+};
+
+    }   // Internal
+}   // Help
+
+#endif  // GENERALSETTINGSPAGE_H