Wt

I use Qt with Wt, in the pro file I have this:

LIBS + = -LZ: / PROGRAM_FILE / Wt_402_msvs2015_x64 / lib

@CONFIG (release, debug | release): LIBS + = -lwt -lwthttp -lwtdbo -lwtdbomysql -llibhpdf

else: CONFIG (debug, debug | release): LIBS + = -lwtd -lwthttpd -lwtdbod -lwtdbomysqld -llibhpdfd

else: unix: LIBS + = -lwt -lwthttp -lwtdbo -lwtdbomysql -llibhpdf

INCLUDEPEPH + = Z: / PROGRAM_FILE / Wt_402_msvs2015_x64 / include@

I would like to create a pdf to be downloaded I have this code:

@#include <Wt / WResource.h>

#include <Wt / Http / Request.h>

#include <Wt / Http / Response.h>

#include <Wt / Render / WPdfRenderer.h>

#include <Wt / Render / WTextRenderer.h>

#include <hpdf.h>

class ReportResource: public Wt :: WResource

{

    public:

        ReportResource (Wt :: WContainerWidget * target): WResource (), m_target (nullptr)

        {

            suggestFileName ( "document.pdf");

            m_target = target;

        }

        virtual ~ ReportResource () {beingDeleted (); }

        virtual void handleRequest (const Wt :: Http :: Request & request, Wt :: Http :: Response & response)

        {

            response.setMimeType ( "text / html");

            HPDF_Doc pdf = HPDF_New (error_handler, 0);

            HPDF_UseUTFEncodings (pdf); // Note: UTF-8 encoding (for TrueType fonts) is only available since libharu 2.3.0!

            renderReport (pdf);

            HPDF_SaveToStream (pdf);

            unsigned int size = HPDF_GetStreamSize (pdf);

            HPDF_BYTE * buf = new HPDF_BYTE [size];

            HPDF_ReadFromStream (pdf, buf, & size);

            HPDF_Free (pdf);

            response.out (). write ((char *) buf, size);

            delete [] buf;

        }

    private:

        Wt :: WContainerWidget * m_target;

        void renderReport (HPDF_Doc pdf)

        {

            std :: stringstream ss;

            m_target-> htmlText (ss);

            std :: string out = ss.str ();

            / * std :: string out_id = m_target-> id ();

            std :: string out_parent_id = m_target-> parent () -> id (); * /

            HPDF_Page page = HPDF_AddPage (pdf);

            HPDF_Page_SetSize (page, HPDF_PAGE_SIZE_A4, HPDF_PAGE_PORTRAIT);

            renderPdf (Wt :: WString :: fromUTF8 (out), pdf);

        }

        void renderPdf (Wt const :: WString & html, HPDF_Doc pdf)

        {

            HPDF_Page page = HPDF_AddPage (pdf);

            HPDF_Page_SetSize (page, HPDF_PAGE_SIZE_A4, HPDF_PAGE_PORTRAIT);

            Wt :: Render :: WPdfRenderer renderer (pdf, page);

            renderer.setMargin (2.54);

            renderer.setDpi (96);

            renderer.render (html);

        }

};@

but I have a compilation error

fret.obj: -1: error: LNK2019: unresolved external symbol "__declspec (dllimport) public: __cdecl Wt :: Render :: WPdfRenderer :: WPdfRenderer (struct _HPDF_Doc_Rec *, struct _HPDF_Dict_Rec *)" (__imp _? 0WPdfRenderer Render @ Wt @@ QEAA @ PEAU_HPDF_Doc_Rec @@ PEAU_HPDF_Dict_Rec @@@ Z) referenced in function "private: void __cdecl ReportResource :: renderPdf (class Wt :: WString const &, struct _HPDF_Doc_Rec *)" (? RenderPdf @ ReportResource @@ AEAAXAEBVWString @ Wt @@ @@@ PEAU_HPDF_Doc_Rec Z)

@

How to solve this problem?