syntax_line_edit.h

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#ifndef SYNTAX_LINE_EDIT_H
#define SYNTAX_LINE_EDIT_H
 
#include <QLineEdit>
 
class QCompleter;
class QStringListModel;
 
class SyntaxLineEdit : public QLineEdit
{
    Q_OBJECT
    Q_PROPERTY(SyntaxState syntaxState READ syntaxState)
    Q_ENUMS(SyntaxState)
 
public:
    explicit SyntaxLineEdit(QWidget *parent = 0);
 
    enum SyntaxState {
        Empty,      
        Busy,       
        Invalid,    
        Deprecated, 
        Valid       
    };
 
    SyntaxState syntaxState() const { return syntax_state_; }
 
    void setSyntaxState(SyntaxState state = Empty);
 
    QString syntaxErrorMessage();
 
    QString syntaxErrorMessageFull();
 
    QString styleSheet() const;
 
    QString deprecatedToken();
 
    void setCompleter(QCompleter *c);
 
    QCompleter *completer() const { return completer_; }
 
    void allowCompletion(bool enabled);
 
    static QString createSyntaxErrorMessageFull(const QString &filter,
                                                const QString &err_msg,
                                                qsizetype loc_start,
                                                size_t loc_length);
 
public slots:
    void setStyleSheet(const QString &style_sheet);
 
    void insertFilter(const QString &filter);
 
    bool checkDisplayFilter(QString filter);
 
    void checkFieldName(QString field);
 
    void checkCustomColumn(QString fields);
 
    void checkInteger(QString number);
 
protected:
    QCompleter       *completer_;         
    QStringListModel *completion_model_;  
    void setCompletionTokenChars(const QString &token_chars) { token_chars_ = token_chars; }
 
    bool isComplexFilter(const QString &filter);
 
    virtual void buildCompletionList(const QString &field_word, const QString &preamble)
    {
        Q_UNUSED(field_word);
        Q_UNUSED(preamble);
    }
 
    QPoint getTokenUnderCursor();
 
    QStringList splitLineUnderCursor();
 
    virtual bool event(QEvent *event);
 
    void completionKeyPressEvent(QKeyEvent *event);
 
    void completionFocusInEvent(QFocusEvent *event);
 
    virtual void focusOutEvent(QFocusEvent *event);
 
    virtual void paintEvent(QPaintEvent *event);
 
private:
    SyntaxState syntax_state_;              
    QString     style_sheet_;               
    QString     state_style_sheet_;         
    QString     syntax_error_message_;      
    QString     syntax_error_message_full_; 
    QString     token_chars_;               
    bool        completion_enabled_;        
private slots:
    void insertFieldCompletion(const QString &completion_text);
 
signals:
};
 
#endif // SYNTAX_LINE_EDIT_H