gwfexpressionedit.h

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#ifndef OPENSWMMVIS_UI_GWFEXPRESSIONEDIT_H
#define OPENSWMMVIS_UI_GWFEXPRESSIONEDIT_H
 
#include <QPalette>
#include <QSet>
#include <QStringList>
#include <QSyntaxHighlighter>
#include <QTextCharFormat>
#include <QTextEdit>
 
class QCompleter;
 
namespace openswmmvis::ui {
 
class GwfSyntaxHighlighter : public QSyntaxHighlighter
{
    Q_OBJECT
 
public:
    GwfSyntaxHighlighter(QTextDocument *doc, const QStringList &variables,
                         const QStringList &functions);
 
    void setPalette(const QPalette &palette);
 
protected:
    void highlightBlock(const QString &text) override;
 
private:
    void rebuildFormats_();
 
    QSet<QString>   m_vars;    
    QSet<QString>   m_funcs;   
    QPalette        m_palette;
    QTextCharFormat m_fmtVariable;
    QTextCharFormat m_fmtFunction;
    QTextCharFormat m_fmtOperator;
    QTextCharFormat m_fmtNumber;
    QTextCharFormat m_fmtUnknown;
};
 
class GwfExpressionEdit : public QTextEdit
{
    Q_OBJECT
 
public:
    explicit GwfExpressionEdit(void *engineHandle, QWidget *parent = nullptr);
 
    [[nodiscard]] QString expression() const { return toPlainText(); }
    void setExpression(const QString &text);
 
    void validateNow();
 
    [[nodiscard]] bool isValid() const { return m_valid; }
 
    [[nodiscard]] QStringList variableNames() const { return m_varNames; }
    [[nodiscard]] QStringList variableDescriptions() const { return m_varDescs; }
    [[nodiscard]] QStringList functionNames() const { return m_funcNames; }
 
    void insertAtCursor(const QString &text);
 
signals:
    void validationChanged(bool ok, const QString &msg, int col);
    void editingFinished();   
 
protected:
    void keyPressEvent(QKeyEvent *e) override;
    void focusInEvent(QFocusEvent *e) override;
 
private:
    void loadVocabulary_();
    void showCompleter_(const QString &prefix);
    void insertCompletion_(const QString &completion);
    [[nodiscard]] QString textUnderCursor_() const;
 
    void                 *m_engine      = nullptr;
    GwfSyntaxHighlighter *m_highlighter = nullptr;
    QCompleter           *m_completer   = nullptr;
    class QTimer         *m_debounce    = nullptr;
    bool                  m_valid       = true;
    QStringList           m_varNames;
    QStringList           m_varDescs;
    QStringList           m_funcNames;
};
 
} // namespace openswmmvis::ui
 
#endif // OPENSWMMVIS_UI_GWFEXPRESSIONEDIT_H