texteditor.h

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#pragma once
 
#include "utilities/findreplacedialog.h"
 
#include <QPlainTextEdit>
 
class LineNumberArea;
 
class TextEditor : public QPlainTextEdit
{
    Q_OBJECT
 
public:
    explicit TextEditor(QWidget *parent = nullptr);
    void lineNumberAreaPaintEvent(QPaintEvent *event);
    int lineNumberAreaWidth();
 
    void setLineNumberAreaFont(const QFont& font)
    {
        lineNumberArea->setFont(font);
    }
 
public slots:
    void findReplace();
 
signals:
    void message(const QString& text, int timeout = 5000);
    void openMessage(const QString& text);
 
protected:
    void resizeEvent(QResizeEvent *event) override;
    void keyPressEvent(QKeyEvent *event) override;
 
private slots:
    void updateLineNumberAreaWidth(int newBlockCount);
    void highlightCurrentLine();
    void updateLineNumberArea(const QRect &rect, int dy);
 
private:
    QWidget *lineNumberArea;
    FindReplaceDialog *m_findReplace = nullptr;
};
 
class LineNumberArea : public QWidget
{
public:
    explicit LineNumberArea(TextEditor *parentEditor) : QWidget(parentEditor), m_editor(parentEditor)
    {}
 
    QSize sizeHint() const override
    {
        return QSize(m_editor->lineNumberAreaWidth(), 0);
    }
 
protected:
    void paintEvent(QPaintEvent *event) override
    {
        m_editor->lineNumberAreaPaintEvent(event);
    }
 
private:
    TextEditor *m_editor;
};