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142 lines
3.8 KiB
142 lines
3.8 KiB
#ifndef __qwt3d_io_2003_07_04_23_27__
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#define __qwt3d_io_2003_07_04_23_27__
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#include <vector>
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#include <algorithm>
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#include <qstring.h>
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#include <qstringlist.h>
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#include "qwt3d_global.h"
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namespace Qwt3D
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{
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class Plot3D;
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/**
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IO provides a generic interface for standard and user written I/O handlers.
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It also provides functionality for the registering of such handlers in the
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framework.\n
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The interface mimics roughly Qt's QImageIO functions for defining
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image input/output functions.
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*/
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class QWT3D_EXPORT IO
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{
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public:
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/*!
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The function type that can be processed by the define... members.
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An extension is the IO::Functor.
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*/
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typedef bool (*Function)(Plot3D*, QString const& fname);
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/*!
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This class gives more flexibility in implementing
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userdefined IO handlers than the simple IO::Function type.
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*/
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class Functor
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{
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public:
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virtual ~Functor() {}
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/*! Must clone the content of *this for an object of a derived class with
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\c new and return the pointer. Like operator() the predefined Functors
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hide this function from the user, still allowing IO access
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(friend declaration)
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*/
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virtual Functor* clone() const = 0;
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/*! The workhorse of the user-defined implementation. Eventually, the
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framework will call this operator.
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*/
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virtual bool operator()(Plot3D* plot, QString const& fname) = 0;
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};
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static bool defineInputHandler( QString const& format, Function func);
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static bool defineOutputHandler( QString const& format, Function func);
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static bool defineInputHandler( QString const& format, Functor const& func);
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static bool defineOutputHandler( QString const& format, Functor const& func);
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static bool save(Plot3D*, QString const& fname, QString const& format);
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static bool load(Plot3D*, QString const& fname, QString const& format);
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static QStringList inputFormatList();
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static QStringList outputFormatList();
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static Functor* outputHandler(QString const& format);
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static Functor* inputHandler(QString const& format);
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private:
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IO(){}
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//! Lightweight Functor encapsulating an IO::Function
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class Wrapper : public Functor
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{
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public:
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//! Performs actual input
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Functor* clone() const { return new Wrapper(*this); }
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//! Creates a Wrapper object from a function pointer
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explicit Wrapper(Function h) : hdl(h) {}
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//! Returns a pointer to the wrapped function
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bool operator()(Plot3D* plot, QString const& fname)
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{
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return (hdl) ? (*hdl)(plot, fname) : false;
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}
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private:
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Function hdl;
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};
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struct Entry
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{
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Entry();
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~Entry();
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Entry(Entry const& e);
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void operator=(Entry const& e);
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Entry(QString const& s, Functor const& f);
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Entry(QString const& s, Function f);
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QString fmt;
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Functor* iofunc;
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};
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struct FormatCompare
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{
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explicit FormatCompare(Entry const& e);
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bool operator() (Entry const& e);
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Entry e_;
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};
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struct FormatCompare2
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{
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explicit FormatCompare2(QString s);
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bool operator() (Entry const& e);
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QString s_;
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};
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typedef std::vector<Entry> Container;
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typedef Container::iterator IT;
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static bool add_unique(Container& l, Entry const& e);
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static IT find(Container& l, QString const& fmt);
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static Container& rlist();
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static Container& wlist();
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static void setupHandler();
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};
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//! Provides Qt's Pixmap output facilities
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class QWT3D_EXPORT PixmapWriter : public IO::Functor
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{
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friend class IO;
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public:
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PixmapWriter() : quality_(-1) {}
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void setQuality(int val);
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private:
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IO::Functor* clone() const {return new PixmapWriter(*this);}
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bool operator()(Plot3D* plot, QString const& fname);
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QString fmt_;
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int quality_;
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};
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} //ns
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#endif
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