qr_export.cpp

/* qr_export.cpp
 * Copyright (C) 2016  Jonathan Bennett
 * QR export class
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 */

#include "qr_export.h"

BEGIN_EVENT_TABLE(qr_export, wxDialog)

// catch paint events
EVT_PAINT(qr_export::paintEvent)

END_EVENT_TABLE()

qr_export::qr_export(const wxString & title, const Config *selectedConfig)
       : wxDialog(NULL, -1, title, wxDefaultPosition, wxSize(150, 150))
{
    int i;
    char tmpString[10024];
    QRcode *ourQR = NULL;
    wxImage *ourQRImage;
    wxString QRBuf = wxT("");

    wxBoxSizer* sizer = new wxBoxSizer(wxHORIZONTAL);
    if (selectedConfig->KEY_BASE64)
    QRBuf = (wxT("KEY_BASE64:"));
    else
    QRBuf = (wxT("KEY:"));
    QRBuf.Append(selectedConfig->KEY);
    if (!selectedConfig->HMAC.IsEmpty()) {
        if (selectedConfig->HMAC_BASE64)
        QRBuf.Append(wxT(" HMAC_KEY_BASE64:"));
        else
        QRBuf.Append(wxT(" HMAC_KEY:"));
        QRBuf.Append(selectedConfig->HMAC);
    }
    strncpy(tmpString, (const char*)QRBuf.mb_str(wxConvUTF8), 10023);
    ourQR = QRcode_encodeString((char *)tmpString, 0, QR_ECLEVEL_Q, QR_MODE_8, 1);

        unsigned char *rawImage = new unsigned char[ourQR->width * ourQR->width * 3];
    unsigned char *p = ourQR->data;
    for (i=0; i < (ourQR->width * ourQR->width); i++) {
        if (p[i] & 0x00000001) {
            rawImage[i * 3] = 0x00;
            rawImage[i * 3 + 1] = 0x00;
            rawImage[i * 3 + 2] = 0x00;
        } else {
            rawImage[i * 3] = 0xff;
            rawImage[i * 3 + 1] = 0xff;
            rawImage[i * 3 + 2] = 0xff;

        }

    }
    ourQRImage = new wxImage(ourQR->width, ourQR->width, rawImage);
    ourQRImage->Rescale(ourQR->width * 4, ourQR->width * 4);
    bmp = wxBitmap(*ourQRImage);
    sizer->SetMinSize(bmp.GetHeight(), bmp.GetHeight());
    SetSizer(sizer);
    Layout();
    this->Fit();
    Centre();
    ShowModal();
    Destroy();
    QRcode_free(ourQR);
}

void qr_export::paintEvent(wxPaintEvent & evt)
{
    // depending on your system you may need to look at double-buffered dcs
    wxPaintDC dc(this);
    render(dc);

}

void qr_export::paintNow()
{
    // depending on your system you may need to look at double-buffered dcs
    wxClientDC dc(this);
    render(dc);
}

void qr_export::render(wxDC&  dc)
{
    dc.DrawBitmap( bmp, 0, 0, false );

}