cvQueryWidgets.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#include <QComboBox>
#include <QDoubleSpinBox>
#include <QGridLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QLineEdit>
#include <QMap>
#include <QRegularExpression>
#include <QString>
#include <QVBoxLayout>
#include <QWidget>
 
class cvQueryValueWidget : public QWidget {
    Q_OBJECT
 
public:
    enum ValueType {
        NO_VALUE,
        SINGLE_VALUE,
        COMMA_SEPARATED_VALUES,
        RANGE_PAIR,
        LOCATION_WITH_TOLERANCE,  // Must be before LOCATION (ParaView order)
        LOCATION,
    };
 
    explicit cvQueryValueWidget(QWidget* parent = nullptr);
    ~cvQueryValueWidget() override = default;
 
    void setType(ValueType type);
 
    QMap<QString, QString> values() const;
 
    void setValues(const QMap<QString, QString>& values);
 
    void clear();
 
signals:
    void valueChanged();
 
private:
    void rebuildUI();
 
    ValueType m_type;
    QMap<QString, QLineEdit*> m_lineEdits;
};
 
class cvQueryConditionWidget : public QWidget {
    Q_OBJECT
 
public:
    enum TermType {
        ARRAY,                  // Regular array field (ID, NormalX, etc.)
        POINT_NEAREST_TO,       // Point nearest to location
        CELL_CONTAINING_POINT,  // Cell containing a point
    };
 
    explicit cvQueryConditionWidget(QWidget* parent = nullptr);
    ~cvQueryConditionWidget() override = default;
 
    void updateTerms(const QStringList& arrayNames,
                     const QMap<QString, int>& arrayComponents,
                     bool isPointData);
 
    QString expression() const;
 
    void setExpression(const QString& expr);
 
    void clear();
 
signals:
    void conditionChanged();
 
private slots:
    void onTermChanged(int index);
    void onOperatorChanged(int index);
 
private:
    void populateOperators(TermType termType);
    void updateValueWidget();
 
    QString currentTerm() const;
    TermType currentTermType() const;
    void setCurrentTerm(const QString& term);
 
    // Helper to add operator with its metadata
    void addOperator(const QString& text,
                     cvQueryValueWidget::ValueType valueType,
                     const QString& expressionTemplate);
 
    // Helper to add term with its metadata
    void addTerm(const QString& text,
                 TermType type,
                 const QString& internalName);
 
    QComboBox* m_termCombo;
    QComboBox* m_operatorCombo;
    cvQueryValueWidget* m_valueWidget;
 
    // Role constants for combo box item data
    static constexpr int TermTypeRole = Qt::UserRole;
    static constexpr int NameRole = Qt::UserRole + 1;
    static constexpr int ValueTypeRole = Qt::UserRole;
    static constexpr int ExprTemplateRole = Qt::UserRole + 1;
    static constexpr int ExprRegExRole = Qt::UserRole + 2;
};
 
namespace QueryExpressionUtils {
QString formatExpression(const QString& templateStr,
                         const QMap<QString, QString>& values);
 
QRegularExpression createRegex(const QString& templateStr);
 
QStringList splitByAnd(const QString& expression);
}  // namespace QueryExpressionUtils