Encryption settings dialog

Pdf4QtViewer/pdfencryptionstrengthhintwidget.h

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+//    Copyright (C) 2021 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 PDFENCRYPTIONSTRENGTHHINTWIDGET_H
+#define PDFENCRYPTIONSTRENGTHHINTWIDGET_H
+
+#include "pdfviewerglobal.h"
+
+#include <QWidget>
+
+#include <array>
+
+namespace pdfviewer
+{
+
+class PDFEncryptionStrengthHintWidget : public QWidget
+{
+    Q_OBJECT
+
+private:
+    using BaseClass = QWidget;
+
+public:
+    explicit PDFEncryptionStrengthHintWidget(QWidget* parent);
+
+    virtual QSize sizeHint() const override;
+    virtual QSize minimumSizeHint() const override;
+
+    int getCurrentValue() const;
+    void setCurrentValue(int currentValue);
+
+    int getMinValue() const;
+    void setMinValue(int minValue);
+
+    int getMaxValue() const;
+    void setMaxValue(int maxValue);
+
+protected:
+    virtual void paintEvent(QPaintEvent* event) override;
+
+    void correctValue();
+
+    QSize getMarkSize() const;
+    int getMarkSpacing() const;
+    QSize getTextSizeHint() const;
+
+    struct Level
+    {
+        QColor color;
+        QString text;
+    };
+
+    int m_minValue;
+    int m_maxValue;
+    int m_currentValue;
+
+    std::array<Level, 5> m_levels;
+};
+
+}   // namespace pdfviewer
+
+#endif // PDFENCRYPTIONSTRENGTHHINTWIDGET_H