codeeditor_p.h

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#ifndef CODEEDITOR_H
#define CODEEDITOR_H
 
#include <QPlainTextEdit>
#include <QObject>
 
QT_BEGIN_NAMESPACE
class QPaintEvent;
class QResizeEvent;
class QSize;
class QWidget;
QT_END_NAMESPACE
 
class LineNumberArea;
 
class CodeEditor : public QPlainTextEdit
{
    Q_OBJECT
 
public:
    explicit CodeEditor(QWidget *parent = nullptr);
 
    void lineNumberAreaPaintEvent(QPaintEvent *event);
    int lineNumberAreaWidth();
 
protected:
    void resizeEvent(QResizeEvent *event) override;
    void focusOutEvent(QFocusEvent *event) override;
 
Q_SIGNALS:
    void editingFinished(QString);
 
private Q_SLOTS:
    void updateLineNumberAreaWidth(int newBlockCount);
    void highlightCurrentLine();
    void updateLineNumberArea(QRect , int);
 
private:
    QWidget *lineNumberArea;
};
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
class LineNumberArea : public QWidget
{
    Q_OBJECT
 
public:
    explicit LineNumberArea(CodeEditor *editor) : QWidget(editor) {
        codeEditor = editor;
    }
 
    QSize sizeHint() const override {
        return QSize(codeEditor->lineNumberAreaWidth(), 0);
    }
 
protected:
    void paintEvent(QPaintEvent *event) override {
        codeEditor->lineNumberAreaPaintEvent(event);
    }
 
private:
    CodeEditor *codeEditor;
};
 
#endif
 
#endif