add QCodeEditor

external/QCodeEditor/include/internal/QLineNumberArea.hpp

@@ -0,0 +1,56 @@
+#pragma once
+
+// Qt
+#include <QWidget> // Required for inheritance
+
+class QCodeEditor;
+class QSyntaxStyle;
+
+/**
+ * @brief Class, that describes line number area widget.
+ */
+class QLineNumberArea : public QWidget
+{
+    Q_OBJECT
+
+public:
+
+    /**
+     * @brief Constructor.
+     * @param parent Pointer to parent QTextEdit widget.
+     */
+    explicit QLineNumberArea(QCodeEditor* parent=nullptr);
+
+    // Disable copying
+    QLineNumberArea(const QLineNumberArea&) = delete;
+    QLineNumberArea& operator=(const QLineNumberArea&) = delete;
+
+    /**
+     * @brief Overridden method for getting line number area
+     * size.
+     */
+    QSize sizeHint() const override;
+
+    /**
+     * @brief Method for setting syntax style object.
+     * @param style Pointer to syntax style.
+     */
+    void setSyntaxStyle(QSyntaxStyle* style);
+
+    /**
+     * @brief Method for getting syntax style.
+     * @return Pointer to syntax style.
+     */
+    QSyntaxStyle* syntaxStyle() const;
+
+protected:
+    void paintEvent(QPaintEvent* event) override;
+
+private:
+
+    QSyntaxStyle* m_syntaxStyle;
+
+    QCodeEditor* m_codeEditParent;
+
+};
+