filter_edit.h

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#ifndef FILTER_EDIT_H
#define FILTER_EDIT_H
 
#include <QLineEdit>
 
class FilterValidator;
class FilterCompleter;
class QTimer;

class FilterEdit : public QLineEdit
{
    Q_OBJECT
    Q_PROPERTY(QString syntaxState READ syntaxStateName)
 
public:
    enum class SyntaxState {
        Empty,        
        Busy,         
        Intermediate, 
        Invalid,      
        Deprecated,   
        Valid         
    };
    Q_ENUM(SyntaxState)
 
    explicit FilterEdit(QWidget *parent = nullptr);

    SyntaxState state() const { return state_; }

    QString syntaxStateName() const;

    void setValidator(FilterValidator *validator);

    FilterValidator *validator() const { return validator_; }

    void setCompleter(FilterCompleter *completer);

    FilterCompleter *completer() const { return completer_; }

    QString lastError() const;

    QString lastErrorFull() const;

    QString deprecatedToken() const;
 
public slots:
    void insertFilter(const QString &filter);
 
signals:
    void syntaxStateChanged(FilterEdit::SyntaxState state);
 
protected:
    void setState(SyntaxState state);

    void validateNow();
 
private:
    FilterValidator *validator_; 
    FilterCompleter *completer_; 
    SyntaxState      state_;     
    QTimer          *debounce_;  
 
private slots:
    void onTextChanged();
};
 
#endif // FILTER_EDIT_H