Falta un Refresh, que sino no repinta.
#ifndef _HEADER_MAINWINDOW_HPP_
#define _HEADER_MAINWINDOW_HPP_
#include <wx/wx.h>
#include <vector>
#include "CropArea.hpp"
class wxPictureWindow;
DECLARE_EVENT_TYPE(EVT_NEXTPICTURE, -1)
class MainWindow : public wxFrame
{
public:
MainWindow(const std::vector<wxString> &imgs, const wxSize size);
void OnNextPicture(wxCommandEvent &e);
private:
const std::vector<wxString> _imgs;
wxPictureWindow *_picture;
int _counter;
DECLARE_EVENT_TABLE ();
};
#endif /* _HEADER_MAINWINDOW_HPP_ */