LensCalFrame.cpp

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// -*- c-basic-offset: 4 -*-

/* 
 *  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 2 of the License, or (at your option) any later version.
 *
 *  This software 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 software. If not, see
 *  <http://www.gnu.org/licenses/>.
 *
 */

#include "panoinc_WX.h"
#include "panoinc.h"

#include "base_wx/platform.h"
#include "base_wx/wxPlatform.h"
#include "base_wx/LensTools.h"
#include "base_wx/GraphTools.h"
#include "base_wx/wxutils.h"
#include "huginapp/ImageCache.h"
#include "LensCalFrame.h"
#include <wx/app.h>
#include "LensCalApp.h"
#include "hugin/config_defaults.h"
#include <algorithms/optimizer/PTOptimizer.h>
#include "lensdb/LensDB.h"
#include "base_wx/wxLensDB.h"
#include "panodata/StandardImageVariableGroups.h"

const unsigned int cps_per_line=10;

#define DEFAULT_LENSCAL_SCALE 2.0
#define DEFAULT_LENSCAL_THRESHOLD 4.0
#define DEFAULT_RESIZE_DIMENSION 1600
#define DEFAULT_MINLINELENGTH 0.3

bool FileDropTarget::OnDropFiles(wxCoord x, wxCoord y, const wxArrayString& filenames)
{
    DEBUG_TRACE("OnDropFiles");
    LensCalFrame* frame=wxGetApp().GetLensCalFrame();
    if (!frame) 
        return false;

    // try to add as images
    wxArrayString files;
    wxArrayString invalidFiles;
    for (unsigned int i=0; i< filenames.GetCount(); i++)
    {
        wxFileName file(filenames[i]);
        if (file.GetExt().CmpNoCase("jpg") == 0 ||
            file.GetExt().CmpNoCase("jpeg") == 0 ||
            file.GetExt().CmpNoCase("tif") == 0 ||
            file.GetExt().CmpNoCase("tiff") == 0 ||
            file.GetExt().CmpNoCase("png") == 0 ||
            file.GetExt().CmpNoCase("bmp") == 0 ||
            file.GetExt().CmpNoCase("gif") == 0 ||
            file.GetExt().CmpNoCase("pnm") == 0 ||
            file.GetExt().CmpNoCase("sun") == 0 ||
            file.GetExt().CmpNoCase("hdr") == 0 ||
            file.GetExt().CmpNoCase("viff") == 0 )
        {
            if(containsInvalidCharacters(file.GetFullPath()))
            {
                invalidFiles.push_back(file.GetFullPath());
            }
            else
            {
                files.push_back(file.GetFullPath());
            };
        }
    }
    if(!invalidFiles.empty())
    {
        ShowFilenameWarning(frame, invalidFiles);
    }
    // we got some images to add.
    if (!files.empty())
    {
        // use a Command to ensure proper undo and updating of GUI parts
        frame->AddImages(files);
    }
    return true;
}

LensCalFrame::LensCalFrame(wxWindow* parent)
{
    DEBUG_TRACE("");
    // load our children. some children might need special
    // initialization. this will be done later.
    wxXmlResource::Get()->LoadFrame(this, parent, "lenscal_frame");
    DEBUG_TRACE("");

    // load our menu bar
#ifdef __WXMAC__
    wxApp::s_macExitMenuItemId = XRCID("menu_quit");
#endif
    SetMenuBar(wxXmlResource::Get()->LoadMenuBar(this, "lenscal_menubar"));

    m_choice_projection=XRCCTRL(*this,"lenscal_proj_choice",wxChoice);
    FillLensProjectionList(m_choice_projection);
    m_images_list=XRCCTRL(*this,"lenscal_images_list",wxListBox);
    m_images_list->Bind(wxEVT_LISTBOX, &LensCalFrame::OnImageSelected, this);
    m_preview=XRCCTRL(*this,"lenscal_preview",LensCalImageCtrl);

    wxConfigBase* config = wxConfigBase::Get();
    config->Read("/LensCalFrame/EdgeScale",&m_edge_scale,DEFAULT_LENSCAL_SCALE);
    config->Read("/LensCalFrame/EdgeThreshold",&m_edge_threshold,DEFAULT_LENSCAL_THRESHOLD);
    m_resize_dimension=config->Read("/LensCalFrame/ResizeDimension",DEFAULT_RESIZE_DIMENSION);
    config->Read("/LensCalFrame/MinLineLength",&m_minlinelength,DEFAULT_MINLINELENGTH);
    ParametersToDisplay();

    bool selected;
    config->Read("/LensCalFrame/Optimize_a",&selected,false);
    XRCCTRL(*this,"lenscal_opt_a",wxCheckBox)->SetValue(selected);
    config->Read("/LensCalFrame/Optimize_b",&selected,true);
    XRCCTRL(*this,"lenscal_opt_b",wxCheckBox)->SetValue(selected);
    config->Read("/LensCalFrame/Optimize_c",&selected,false);
    XRCCTRL(*this,"lenscal_opt_c",wxCheckBox)->SetValue(selected);
    config->Read("/LensCalFrame/Optimize_de",&selected,false);
    XRCCTRL(*this,"lenscal_opt_de",wxCheckBox)->SetValue(selected);

    // set the minimize icon
#ifdef __WXMSW__
    wxIconBundle myIcons(GetXRCPath() + "data/hugin.ico", wxBITMAP_TYPE_ICO);
    SetIcons(myIcons);
#else
    wxIcon myIcon(GetXRCPath() + "data/hugin.png",wxBITMAP_TYPE_PNG);
    SetIcon(myIcon);
#endif
    SetTitle(_("Hugin Lens calibration GUI"));

    // create a new drop handler. wxwindows deletes the automatically
    SetDropTarget(new FileDropTarget());

    // create a status bar
    const int fields (2);
    CreateStatusBar(fields);
    int widths[fields] = {-1, 85};
    SetStatusWidths( fields, &widths[0]);

    // Set sizing characteristics
    //set minumum size
#if defined __WXMAC__ || defined __WXMSW__
    // a minimum nice looking size; smaller than this would clutter the layout.
    SetSizeHints(900, 675);
#else
    // For ASUS eeePc
    SetSizeHints(780, 455); //set minumum size
#endif

    // set progress display for image cache.
    ImageCache::getInstance().setProgressDisplay(this);
#if defined __WXMSW__
    unsigned long long mem = HUGIN_IMGCACHE_UPPERBOUND;
    unsigned long mem_low = config->Read("/ImageCache/UpperBound", HUGIN_IMGCACHE_UPPERBOUND);
    unsigned long mem_high = config->Read("/ImageCache/UpperBoundHigh", (long) 0);
    if (mem_high > 0) {
      mem = ((unsigned long long) mem_high << 32) + mem_low;
    }
    else {
      mem = mem_low;
    }
    ImageCache::getInstance().SetUpperLimit(mem);
#else
    ImageCache::getInstance().SetUpperLimit(config->Read("/ImageCache/UpperBound", HUGIN_IMGCACHE_UPPERBOUND));
#endif
    // bind event handler
    Bind(wxEVT_MENU, &LensCalFrame::OnSaveProject, this, XRCID("menu_save"));
    Bind(wxEVT_MENU, &LensCalFrame::OnExit, this, XRCID("menu_quit"));
    Bind(wxEVT_BUTTON, &LensCalFrame::OnAddImage, this, XRCID("lenscal_add_image"));
    Bind(wxEVT_BUTTON, &LensCalFrame::OnRemoveImage, this, XRCID("lenscal_remove_image"));
    Bind(wxEVT_BUTTON, &LensCalFrame::OnFindLines, this, XRCID("lenscal_find_lines"));
    Bind(wxEVT_BUTTON, &LensCalFrame::OnReset, this, XRCID("lenscal_reset"));
    Bind(wxEVT_BUTTON, &LensCalFrame::OnOptimize, this, XRCID("lenscal_opt"));
    Bind(wxEVT_BUTTON, &LensCalFrame::OnShowDistortionGraph, this, XRCID("lenscal_show_distortion_graph"));
    Bind(wxEVT_BUTTON, &LensCalFrame::OnSaveLens, this, XRCID("lenscal_save_lens"));
    Bind(wxEVT_BUTTON, &LensCalFrame::OnRefresh, this, XRCID("lenscal_refresh"));
    Bind(wxEVT_CHOICE, &LensCalFrame::OnSelectPreviewContent, this, XRCID("lenscal_preview_content"));
    Bind(wxEVT_CHECKBOX, &LensCalFrame::OnShowLines, this, XRCID("lenscal_show_lines"));
    //disable buttons
    EnableButtons();
    XRCCTRL(*this, "lenscal_remove_image", wxButton)->Enable(false);
}

LensCalFrame::~LensCalFrame()
{
    DEBUG_TRACE("dtor");
    m_preview->SetEmptyImage();
    ImageCache::getInstance().setProgressDisplay(0);
    delete & ImageCache::getInstance();
    // get the global config object
    wxConfigBase* config = wxConfigBase::Get();
    if(ReadInputs(false,true,false))
    {
        config->Write("/LensCalFrame/EdgeScale",m_edge_scale);
        config->Write("/LensCalFrame/EdgeThreshold",m_edge_threshold);
        config->Write("/LensCalFrame/ResizeDimension",(int)m_resize_dimension);
        config->Write("/LensCalFrame/MinLineLength",m_minlinelength);
    };
    config->Write("/LensCalFrame/Optimize_a",XRCCTRL(*this,"lenscal_opt_a",wxCheckBox)->GetValue());
    config->Write("/LensCalFrame/Optimize_b",XRCCTRL(*this,"lenscal_opt_b",wxCheckBox)->GetValue());
    config->Write("/LensCalFrame/Optimize_c",XRCCTRL(*this,"lenscal_opt_c",wxCheckBox)->GetValue());
    config->Write("/LensCalFrame/Optimize_de",XRCCTRL(*this,"lenscal_opt_de",wxCheckBox)->GetValue());
    hugin_utils::StoreFramePosition(this, "LensCalFrame");
    config->Flush();
    //cleanup
    for(unsigned int i=0;i<m_images.size();i++)
    {
        delete m_images[i];
    };
    m_images.clear();
    HuginBase::LensDB::LensDB::Clean();
    DEBUG_TRACE("dtor end");
}

void LensCalFrame::ParametersToDisplay()
{
    XRCCTRL(*this,"lenscal_scale",wxTextCtrl)->SetValue(hugin_utils::doubleTowxString(m_edge_scale,2));
    XRCCTRL(*this, "lenscal_threshold", wxTextCtrl)->SetValue(hugin_utils::doubleTowxString(m_edge_threshold, 2));
    XRCCTRL(*this, "lenscal_resizedim", wxTextCtrl)->SetValue(wxString::Format("%d", m_resize_dimension));
    XRCCTRL(*this, "lenscal_minlinelength", wxTextCtrl)->SetValue(hugin_utils::doubleTowxString(m_minlinelength, 2));
};

const wxString & LensCalFrame::GetXRCPath()
{
     return wxGetApp().GetXRCPath();
};

void LensCalFrame::updateProgressDisplay()
{
    wxString msg;
    if (!m_message.empty())
    {
        msg = wxGetTranslation(wxString(m_message.c_str(), wxConvLocal));
        if (!m_filename.empty())
        {
            msg.Append(" ");
            msg.Append(wxString(ProgressDisplay::m_filename.c_str(), HUGIN_CONV_FILENAME));
        };
    };
    GetStatusBar()->SetStatusText(msg, 0);

#ifdef __WXMSW__
    UpdateWindow(NULL);
#endif
}

void LensCalFrame::OnExit(wxCommandEvent &e)
{
    Close();
};

void LensCalFrame::AddImages(wxArrayString files)
{
    wxArrayString wrongSize;
    wxArrayString wrongExif;
    for (unsigned int i=0; i<files.GetCount(); i++)
    {
        ImageLineList* image=new ImageLineList(files[i]);
        //check input
        {
            // check for black/white images
            const HuginBase::FileMetaData metadata = image->GetPanoImage()->getFileMetadata();
            HuginBase::FileMetaData::const_iterator it = metadata.find("pixeltype");
            if (it != metadata.end())
            {
                if (it->second == "BILEVEL")
                {
                    hugin_utils::HuginMessageBox(wxString::Format(_("File \"%s\" is a black/white image.\nHugin does not support this image type. Skipping this image.\nConvert image to grayscale image and try loading again."), files[i].c_str()),
                        _("Calibrate_lens_GUI"), wxOK | wxICON_EXCLAMATION, this);
                    delete image;
                    continue;
                };
            };
        };
        if(!m_images.empty())
        {
            const HuginBase::SrcPanoImage* image0=m_images[0]->GetPanoImage();
            const HuginBase::SrcPanoImage* image1=image->GetPanoImage();
            if(image0->getSize()!=image1->getSize())
            {
                wrongSize.push_back(files[i]);
                delete image;
                continue;
            };
            if(!image0->getExifMake().empty() && !image1->getExifMake().empty() &&
               !image0->getExifModel().empty() && !image1->getExifModel().empty() &&
               image0->getExifFocalLength()>0 && image1->getExifFocalLength()>0 &&
               image0->getCropFactor()>0 && image1->getCropFactor()>0                 
              )
            {
                if(image0->getExifMake()!=image1->getExifMake() ||
                    image0->getExifModel()!=image1->getExifModel() ||
                    image0->getExifFocalLength()!=image1->getExifFocalLength() ||
                    image0->getCropFactor()!=image1->getCropFactor())
                {
                    //only show a warning, but continue processing
                    wrongExif.push_back(files[i]);
                };
            };
        };
        m_images.push_back(image);
        SetStatusText(wxString::Format(_("Added %s"),image->GetFilename().c_str()));
        if (image->GetPanoImage()->getExifFocalLength() > 0)
        {
            XRCCTRL(*this, "lenscal_focallength", wxTextCtrl)->SetValue(
                hugin_utils::doubleTowxString(image->GetPanoImage()->getExifFocalLength(), 2)
                );
        };
        if (image->GetPanoImage()->getExifCropFactor() > 0)
        {
            XRCCTRL(*this, "lenscal_cropfactor", wxTextCtrl)->SetValue(
                hugin_utils::doubleTowxString(image->GetPanoImage()->getCropFactor(), 2)
                );
        };
        SelectListValue(m_choice_projection,image->GetPanoImage()->getProjection());
    }
    UpdateList(false);
    m_images_list->SetSelection(m_images_list->GetCount()-1);
    wxCommandEvent e;
    OnImageSelected(e);
    EnableButtons();
    if(!wrongSize.empty())
    {
        wxString fileText;
        for(unsigned int i=0;i<wrongSize.size();i++)
        {
            wxFileName filename(wrongSize[i]);
            fileText.Append(filename.GetFullName());
            if(i<wrongSize.size()-1)
                fileText.Append(", ");
        };
        hugin_utils::HuginMessageBox(wxString::Format(_("The size of the images (%s) does not match the already added image(s)."), fileText.c_str()),
            _("Calibrate_lens_GUI"), wxOK | wxICON_EXCLAMATION, this);
    };
    if(!wrongExif.empty())
    {
        wxString fileText;
        for(unsigned int i=0;i<wrongExif.size();i++)
        {
            wxFileName filename(wrongExif[i]);
            fileText.Append(filename.GetFullName());
            if(i<wrongExif.size()-1)
                fileText.Append(", ");
        };
        hugin_utils::HuginMessageBox(wxString::Format(_("The EXIF information of the added images (%s) is not consistent with the already added image(s).\nPlease check the image again, if you selected the correct images."), fileText.c_str()),
            _("Calibrate_lens_GUI"), wxOK | wxICON_EXCLAMATION, this);
    };
};

void LensCalFrame::OnAddImage(wxCommandEvent &e)
{
    wxConfigBase* config = wxConfigBase::Get();
    wxString path = config->Read("/actualPath", wxEmptyString);
    wxFileDialog dlg(this,_("Add images"),
                     path, wxEmptyString,
                     GetFileDialogImageFilters(),
                     wxFD_OPEN | wxFD_MULTIPLE | wxFD_FILE_MUST_EXIST | wxFD_PREVIEW, wxDefaultPosition);
    dlg.SetDirectory(path);

    // remember the image extension
    wxString img_ext;
    if (config->HasEntry("lastImageType")){
      img_ext = config->Read("lastImageType").c_str();
    }
    if (img_ext == "all images")
      dlg.SetFilterIndex(0);
    else if (img_ext == "jpg")
      dlg.SetFilterIndex(1);
    else if (img_ext == "tiff")
      dlg.SetFilterIndex(2);
    else if (img_ext == "png")
      dlg.SetFilterIndex(3);
    else if (img_ext == "hdr")
      dlg.SetFilterIndex(4);
    else if (img_ext == "exr")
      dlg.SetFilterIndex(5);
    else if (img_ext == "all files")
      dlg.SetFilterIndex(6);
    DEBUG_INFO ( "Image extention: " << img_ext.mb_str(wxConvLocal) )

    // call the file dialog
    if (dlg.ShowModal() == wxID_OK)
    {
        // get the selections
        wxArrayString Pathnames;
        dlg.GetPaths(Pathnames);

        // save the current path to config
#ifdef __WXGTK__
        //workaround a bug in GTK, see https://bugzilla.redhat.com/show_bug.cgi?id=849692 and http://trac.wxwidgets.org/ticket/14525
        config->Write("/actualPath", wxPathOnly(Pathnames[0]));
#else
        config->Write("/actualPath", dlg.GetDirectory());
#endif

        wxArrayString invalidFiles;
        for(unsigned int i=0;i<Pathnames.GetCount(); i++)
        {
            if(containsInvalidCharacters(Pathnames[i]))
            {
                invalidFiles.push_back(Pathnames[i]);
            };
        };
        if(!invalidFiles.empty())
        {
            ShowFilenameWarning(this, invalidFiles);
        }
        else
        {
            AddImages(Pathnames);
        };
        DEBUG_INFO ( wxString::Format("img_ext: %d", dlg.GetFilterIndex()).mb_str(wxConvLocal) )
        // save the image extension
        switch ( dlg.GetFilterIndex() )
        {
            case 0: config->Write("lastImageType", "all images"); break;
            case 1: config->Write("lastImageType", "jpg"); break;
            case 2: config->Write("lastImageType", "tiff"); break;
            case 3: config->Write("lastImageType", "png"); break;
            case 4: config->Write("lastImageType", "hdr"); break;
            case 5: config->Write("lastImageType", "exr"); break;
            case 6: config->Write("lastImageType", "all files"); break;
        }
    }
    else
    {
        // nothing to open
        SetStatusText( _("Add Image: cancel"));
    }
    EnableButtons();
};

void LensCalFrame::UpdateListString(unsigned int index)
{
    wxFileName file(m_images[index]->GetFilename());
    m_images_list->SetString(index,wxString::Format(_("%s (%d lines)"),file.GetFullName().c_str(),m_images[index]->GetNrOfValidLines()));
};

void LensCalFrame::UpdateList(bool restoreSelection)
{
    int oldSelection=m_images_list->GetSelection();
    m_images_list->Clear();
    for(unsigned int i=0;i<m_images.size();i++)
    {
        wxFileName file(m_images[i]->GetFilename());
        wxString text=wxString::Format(_("%s (%d lines)"),file.GetFullName().c_str(),m_images[i]->GetNrOfValidLines());
        m_images_list->Append(text);
    };
    if(oldSelection!=wxNOT_FOUND && restoreSelection)
    {
        m_images_list->SetSelection(oldSelection);
    };
    wxCommandEvent e;
    OnImageSelected(e);
};

void LensCalFrame::OnRemoveImage(wxCommandEvent &e)
{
    int selection=m_images_list->GetSelection();
    if(selection!=wxNOT_FOUND)
    {
        // remove file from cache
        const std::string filename(m_images[selection]->GetFilename().mb_str(HUGIN_CONV_FILENAME));
        ImageCache::getInstance().removeImage(filename);
        delete m_images[selection];
        m_images.erase(m_images.begin()+selection);
        UpdateList(false);
    }
    else
    {
        wxBell();
    };
    EnableButtons();
};

void LensCalFrame::EnableButtons()
{
    const bool enabling = !m_images.empty();
    XRCCTRL(*this,"lenscal_find_lines",wxButton)->Enable(enabling);
    XRCCTRL(*this,"lenscal_opt",wxButton)->Enable(enabling);
    XRCCTRL(*this, "lenscal_show_distortion_graph", wxButton)->Enable(enabling);
    XRCCTRL(*this,"lenscal_save_lens",wxButton)->Enable(enabling);
    GetMenuBar()->Enable(XRCID("menu_save"),enabling);
};

bool LensCalFrame::ReadInputs(bool readFocalLength,bool readOptions,bool readLensParameter)
{
    if(readFocalLength)
    {
        m_projection = (HuginBase::SrcPanoImage::Projection)GetSelectedValue(m_choice_projection);
        if (!hugin_utils::str2double(XRCCTRL(*this, "lenscal_focallength", wxTextCtrl)->GetValue(), m_focallength))
            return false;
        if(m_focallength<1)
            return false;
        if (!hugin_utils::str2double(XRCCTRL(*this, "lenscal_cropfactor", wxTextCtrl)->GetValue(), m_cropfactor))
            return false;
        if(m_cropfactor<0.1)
            return false;
    }
    if(readOptions)
    {
        if (!hugin_utils::str2double(XRCCTRL(*this, "lenscal_scale", wxTextCtrl)->GetValue(), m_edge_scale))
            return false;
        if (!hugin_utils::str2double(XRCCTRL(*this, "lenscal_threshold", wxTextCtrl)->GetValue(), m_edge_threshold))
            return false;
        double resize_dim;
        if (!hugin_utils::str2double(XRCCTRL(*this, "lenscal_resizedim", wxTextCtrl)->GetValue(), resize_dim))
            return false;
        if(resize_dim<100)
            return false;
        m_resize_dimension=(unsigned int)resize_dim;
        if (!hugin_utils::str2double(XRCCTRL(*this, "lenscal_minlinelength", wxTextCtrl)->GetValue(), m_minlinelength))
            return false;
        if(m_minlinelength<=0 || m_minlinelength>1)
            return false;
    };
    if(readLensParameter)
    {
        if (!hugin_utils::str2double(XRCCTRL(*this, "lenscal_a", wxTextCtrl)->GetValue(), m_a))
            return false;
        if (!hugin_utils::str2double(XRCCTRL(*this, "lenscal_b", wxTextCtrl)->GetValue(), m_b))
            return false;
        if (!hugin_utils::str2double(XRCCTRL(*this, "lenscal_c", wxTextCtrl)->GetValue(), m_c))
            return false;
        if (!hugin_utils::str2double(XRCCTRL(*this, "lenscal_d", wxTextCtrl)->GetValue(), m_d))
            return false;
        if (!hugin_utils::str2double(XRCCTRL(*this, "lenscal_e", wxTextCtrl)->GetValue(), m_e))
            return false;
    }
    return true;
};

void LensCalFrame::OnFindLines(wxCommandEvent &e)
{
    if(!ReadInputs(true,true,false))
    {
        hugin_utils::HuginMessageBox(_("There are invalid values in the input boxes.\nPlease check your inputs."), _("Calibrate_lens_GUI"), wxOK | wxICON_INFORMATION, this);
        return;
    }
    m_preview->SetLens(m_projection,m_focallength,m_cropfactor);
    for(unsigned int i=0;i<m_images.size();i++)
    {
        std::string filename(m_images[i]->GetFilename().mb_str(HUGIN_CONV_FILENAME));
        ImageCache::EntryPtr img=ImageCache::getInstance().getImage(filename);
        double scale;
        SetStatusText(_("Detecting edges..."));
        m_images[i]->SetEdgeImage(HuginLines::detectEdges(*(img->get8BitImage()),m_edge_scale,m_edge_threshold,m_resize_dimension,scale));
        SetStatusText(_("Finding lines..."));
        m_images[i]->SetLines(HuginLines::findLines(*(m_images[i]->GetEdgeImage()),m_minlinelength,m_focallength,m_cropfactor));
        m_images[i]->ScaleLines(scale);
    };
    SetStatusText(_("Finished"));
    UpdateList(true);
};

void LensCalFrame::OnOptimize(wxCommandEvent &e)
{
    if(!ReadInputs(true,false,true))
    {
        hugin_utils::HuginMessageBox(_("There are invalid values in the input boxes.\nPlease check your inputs."), _("Calibrate_lens_GUI"), wxOK | wxICON_INFORMATION, this);
        return;
    }
    unsigned int count=0;
    for(unsigned int i=0;i<m_images.size();i++)
        count+=m_images[i]->GetNrOfValidLines();
    if(count==0)
    {
        hugin_utils::HuginMessageBox(_("There are no detected lines.\nPlease run \"Find lines\" first. If there are no lines found, change the parameters."), _("Calibrate_lens_GUI"), wxOK | wxICON_INFORMATION, this);
        return;
    };
    Optimize();
};

void LensCalFrame::OnShowDistortionGraph(wxCommandEvent &e)
{
    if (m_images.empty())
    {
        return;
    };
    if (!ReadInputs(true, false, true))
    {
        hugin_utils::HuginMessageBox(_("There are invalid values in the input boxes.\nPlease check your inputs."), _("Calibrate_lens_GUI"), wxOK | wxICON_INFORMATION, this);
        return;
    };
    delete m_popup;
    HuginBase::SrcPanoImage image(*(m_images[0]->GetPanoImage()));
    image.setProjection(m_projection);
    image.setExifFocalLength(m_focallength);
    image.setCropFactor(m_cropfactor);
    image.setVar("a", m_a);
    image.setVar("b", m_b);
    image.setVar("c", m_c);
    image.setVar("d", m_d);
    image.setVar("e", m_e);
    image.setHFOV(HuginBase::SrcPanoImage::calcHFOV(image.getProjection(), image.getExifFocalLength(), image.getCropFactor(), image.getSize()));

    m_popup=new wxGraphTools::GraphPopupWindow(this, wxGraphTools::GetDistortionGraph(image));
    wxWindow *button = (wxWindow*)e.GetEventObject();
    wxPoint pos = button->ClientToScreen(wxPoint(0, 0));
    m_popup->Position(pos, button->GetSize());
    m_popup->Popup();
};

HuginBase::Panorama LensCalFrame::GetPanorama()
{
    HuginBase::Panorama pano;
    HuginBase::OptimizeVector optvec;
    unsigned int line_number=3; 
    for(unsigned int i=0;i<m_images.size();i++)
    {
        HuginBase::SrcPanoImage image(*(m_images[i]->GetPanoImage()));
        image.setProjection(m_projection);
        image.setExifFocalLength(m_focallength);
        image.setCropFactor(m_cropfactor);
        image.setVar("a",m_a);
        image.setVar("b",m_b);
        image.setVar("c",m_c);
        image.setVar("d",m_d);
        image.setVar("e",m_e);
        double hfov = HuginBase::SrcPanoImage::calcHFOV(image.getProjection(), image.getExifFocalLength(), image.getCropFactor(), image.getSize());
        image.setHFOV(hfov);
        pano.addImage(image);
        std::set<std::string> imgopt;
        if(i==0)
        {
            if(XRCCTRL(*this,"lenscal_opt_a",wxCheckBox)->GetValue())
                imgopt.insert("a");
            if(XRCCTRL(*this,"lenscal_opt_b",wxCheckBox)->GetValue())
                imgopt.insert("b");
            if(XRCCTRL(*this,"lenscal_opt_c",wxCheckBox)->GetValue())
                imgopt.insert("c");
            if(XRCCTRL(*this,"lenscal_opt_de",wxCheckBox)->GetValue())
            {
                imgopt.insert("d");
                imgopt.insert("e");
            }
        };
        optvec.push_back(imgopt);
        //now generate control points from lines
        HuginLines::Lines lines=m_images[i]->GetLines();
        for(unsigned j=0;j<lines.size();j++)
        {
            if(lines[j].status==HuginLines::valid_line)
            {
                HuginBase::CPVector cpv=GetControlPoints(lines[j],i,line_number,cps_per_line);
                for(unsigned int k=0;k<cpv.size();k++)
                    pano.addCtrlPoint(cpv[k]);
                line_number++;
            };
        };
    };
    //assign all images the same lens number
    HuginBase::StandardImageVariableGroups variable_groups(pano);
    HuginBase::ImageVariableGroup & lenses = variable_groups.getLenses();
    if(pano.getNrOfImages()>1)
    {
        for(unsigned int i=1;i<pano.getNrOfImages();i++)
        {
            HuginBase::SrcPanoImage img = pano.getSrcImage(i);
            lenses.switchParts(i,lenses.getPartNumber(0));
            img.setExposureValue(0);
            img.setWhiteBalanceRed(1);
            img.setWhiteBalanceBlue(1);
            pano.setSrcImage(i, img);
        };
    };
    //set default exposure value
    HuginBase::PanoramaOptions opts = pano.getOptions();
    opts.outputExposureValue = 0;
    opts.setProjection(HuginBase::PanoramaOptions::RECTILINEAR);
    pano.setOptions(opts);

    pano.setOptimizeVector(optvec);
    return pano;
};

void LensCalFrame::Optimize()
{
    SetStatusText(_("Optimizing lens distortion parameters..."));
    HuginBase::Panorama pano = GetPanorama();
    HuginBase::PTools::optimize(pano);

    const HuginBase::SrcPanoImage img = pano.getImage(0);
    m_a=img.getVar("a");
    m_b=img.getVar("b");
    m_c=img.getVar("c");
    m_d=img.getVar("d");
    m_e=img.getVar("e");
    XRCCTRL(*this,"lenscal_a",wxTextCtrl)->SetValue(hugin_utils::doubleTowxString(m_a,5));
    XRCCTRL(*this,"lenscal_b",wxTextCtrl)->SetValue(hugin_utils::doubleTowxString(m_b,5));
    XRCCTRL(*this,"lenscal_c",wxTextCtrl)->SetValue(hugin_utils::doubleTowxString(m_c,5));
    XRCCTRL(*this,"lenscal_d",wxTextCtrl)->SetValue(hugin_utils::doubleTowxString(m_d,3));
    XRCCTRL(*this,"lenscal_e",wxTextCtrl)->SetValue(hugin_utils::doubleTowxString(m_e,3));
    m_preview->SetLensDistortions(m_a,m_b,m_c,m_d,m_e);
    SetStatusText(_("Finished"));
};

void LensCalFrame::SaveLensToIni()
{
    wxFileDialog dlg(this,
                        _("Save lens parameters file"),
                        wxConfigBase::Get()->Read("/lensPath",wxEmptyString), wxEmptyString,
                        _("Lens Project Files (*.ini)|*.ini|All files (*)|*"),
                        wxFD_SAVE | wxFD_OVERWRITE_PROMPT, wxDefaultPosition);
    dlg.SetDirectory(wxConfigBase::Get()->Read("/lensPath",wxEmptyString));
    if (dlg.ShowModal() == wxID_OK)
    {
        wxFileName filename(dlg.GetPath());
        if(!filename.HasExt())
            filename.SetExt("ini");
        wxConfig::Get()->Write("/lensPath", dlg.GetDirectory());  // remember for later
        if (filename.FileExists())
        {
            if (!hugin_utils::AskUserOverwrite(filename.GetFullPath(), _("Calibrate_lens_GUI"), this))
            {
                return;
            }
        }
        HuginBase::Panorama pano = GetPanorama();
        SaveLensParameters(filename.GetFullPath(),&pano,0);
    }
};

void LensCalFrame::OnSaveLens(wxCommandEvent &e)
{
    if(!ReadInputs(true,false,true))
    {
        hugin_utils::HuginMessageBox(_("There are invalid values in the input boxes.\nPlease check your inputs."), _("Calibrate_lens_GUI"), wxOK | wxICON_INFORMATION, this);
        return;
    }
    unsigned int count=0;
    for(unsigned int i=0;i<m_images.size();i++)
        count+=m_images[i]->GetNrOfValidLines();
    if(count==0)
    {
        hugin_utils::HuginMessageBox(_("There are no detected lines.\nPlease run \"Find lines\" and \"Optimize\" before saving the lens data. If there are no lines found, change the parameters."), _("Calibrate_lens_GUI"), wxOK | wxICON_INFORMATION, this);
        return;
    };

    wxArrayString choices;
    choices.push_back(_("Save lens parameters to ini file"));
    choices.push_back(_("Save lens parameters to lens database"));
    wxSingleChoiceDialog save_dlg(this,_("Saving lens data"),_("Save lens"),choices);
    if(save_dlg.ShowModal()==wxID_OK)
    {
        if(save_dlg.GetSelection()==0)
        {
            SaveLensToIni();
        }
        else
        {
            HuginBase::Panorama pano = GetPanorama();
            SaveLensParameters(this,pano.getImage(0),false);
        };
    };
};

void LensCalFrame::OnSaveProject(wxCommandEvent &e)
{
    if(!ReadInputs(true,false,true))
    {
        hugin_utils::HuginMessageBox(_("There are invalid values in the input boxes.\nPlease check your inputs."), _("Calibrate_lens_GUI"), wxOK | wxICON_INFORMATION, this);
        return;
    }

    wxFileDialog dlg(this,_("Save project file"),wxEmptyString,wxEmptyString,
                     _("Project files (*.pto)|*.pto|All files (*)|*"), wxFD_SAVE | wxFD_OVERWRITE_PROMPT, wxDefaultPosition);
    dlg.SetDirectory(wxConfigBase::Get()->Read("/actualPath",wxEmptyString));
    if (dlg.ShowModal() == wxID_OK)
    {
        wxConfig::Get()->Write("/actualPath", dlg.GetDirectory());  // remember for later
        wxFileName filename(dlg.GetPath());
        if(!filename.HasExt())
            filename.SetExt("pto");
        if (filename.FileExists())
        {
            if (!hugin_utils::AskUserOverwrite(filename.GetFullPath(), _("Calibrate_lens_GUI"), this))
            {
                return;
            }
        }
        HuginBase::Panorama pano = GetPanorama();
        const std::string output(filename.GetFullPath().mb_str(HUGIN_CONV_FILENAME));
        pano.WritePTOFile(output, hugin_utils::getPathPrefix(output));
    };
};

void LensCalFrame::OnImageSelected(wxCommandEvent &e)
{
    bool selected=m_images_list->GetSelection()!=wxNOT_FOUND;
    XRCCTRL(*this,"lenscal_remove_image",wxButton)->Enable(selected);
    if(selected)
    {
        m_preview->SetImage(m_images[m_images_list->GetSelection()],m_images_list->GetSelection());
    }
    else
    {
        m_preview->SetEmptyImage();
    };
};

void LensCalFrame::OnSelectPreviewContent(wxCommandEvent &e)
{
    m_preview->SetMode((LensCalImageCtrl::LensCalPreviewMode)e.GetSelection());
    XRCCTRL(*this,"lenscal_refresh",wxButton)->Enable(m_preview->GetMode()==LensCalImageCtrl::mode_corrected);
};

void LensCalFrame::OnShowLines(wxCommandEvent &e)
{
    m_preview->SetShowLines(XRCCTRL(*this,"lenscal_show_lines",wxCheckBox)->GetValue());
    m_preview->Refresh(true);
};

void LensCalFrame::OnReset(wxCommandEvent &e)
{
    m_edge_scale=DEFAULT_LENSCAL_SCALE;
    m_edge_threshold=DEFAULT_LENSCAL_THRESHOLD;
    m_resize_dimension=DEFAULT_RESIZE_DIMENSION;
    m_minlinelength=DEFAULT_MINLINELENGTH;
    ParametersToDisplay();
};

void LensCalFrame::OnRefresh(wxCommandEvent &e)
{
    if(!ReadInputs(true,false,true))
    {
        hugin_utils::HuginMessageBox(_("There are invalid values in the input boxes.\nPlease check your inputs."), _("Calibrate_lens_GUI"), wxOK | wxICON_INFORMATION, this);
        return;
    }
    m_preview->SetLens(m_projection,m_focallength,m_cropfactor);
    m_preview->SetLensDistortions(m_a,m_b,m_c,m_d,m_e);
};