PShowIf.h

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#pragma once
 
#include "PWidgetWrapper.h"
#include "PGroup.h"
#include <memory>
 
 
class PShowIf : public PWidgetWrapper {
    PGroup *_group;
    bool    _negate = false;
    bool    _hasThen = false;
    bool    _hasElse = false;
 
public:
    PShowIf(std::string tag);
    PShowIf *Equals(long l);
    PShowIf *Equals(std::string s);
    PShowIf *DimensionEquals(unsigned int dim);
    //    PShowIf *Or(PShowIf *);
    PShowIf *Not();
    PShowIf *Then(PWidget *p);
    PShowIf *Else(PWidget *p);
    PShowIf *Then(const PGroup::List &list);
    PShowIf *Else(const PGroup::List &list);
 
protected:
    bool isShown() const override;
 
private:
    bool evaluate() const;
 
    class Helper : public PWidgetWrapper {
        const PShowIf *_parent;
        const bool     _negate;
 
    public:
        Helper(PShowIf *parent, PWidget *widget, bool negate = false);
 
    protected:
        bool isShown() const override;
    };
 
    struct Test {
        const std::string _tag;
        Test(std::string tag) : _tag(tag) {}
        virtual bool Evaluate(VAPoR::ParamsBase *params) const = 0;
        virtual ~Test() {}
    };
 
    struct TestLongEquals : public Test {
        const long _val;
        TestLongEquals(std::string tag, long val) : Test(tag), _val(val) {}
        bool Evaluate(VAPoR::ParamsBase *params) const override;
    };
 
    struct TestStringEquals : public Test {
        const std::string _val;
        TestStringEquals(std::string tag, std::string val) : Test(tag), _val(val) {}
        bool Evaluate(VAPoR::ParamsBase *params) const override;
    };
 
    struct TestDimensionEquals : public Test {
        const long _val;
        TestDimensionEquals(long val) : Test(""), _val(val) {}
        bool Evaluate(VAPoR::ParamsBase *params) const override;
    };
 
    std::unique_ptr<Test> _test;
};