c++ - wxWidgets drawing Panel -

i'm doing application wxwidgets , need draw few images on different panels. in application there 1 main frame, contains panel, contains buttons , text box. want create drawing panels on panel. create simple test class based on wxwidgets examples draw stuff.

#include "minibitmap.h"  minibitmap::minibitmap(wxpanel *parent, int x, int y, int width, int height, char *bits) :      wxpanel(parent, x, y, width, height) {         img = wxbitmap(100,100, wxbitmap_screen_depth); } minibitmap::minibitmap(wxpanel *parent, wxwindowid id, const wxpoint& pos, const wxsize& size) :     wxpanel(parent, id, pos, size) { } void minibitmap::paintevent(wxpaintevent & evt) {     // depending on system may need @ double-buffered dcs     wxpaintdc dc(this);     render(dc); }  void minibitmap::paintnow() {     // depending on system may need @ double-buffered dcs     wxclientdc dc(this);     render(dc); }  void minibitmap::render(wxdc&  dc) {  //   dc.drawbitmap( img, 0, 0, false );     dc.drawtext(wxt("testing"), 40, 60);      dc.setbrush(*wxgreen_brush); // green filling     dc.setpen( wxpen( wxcolor(255,0,0), 5 ) ); // 5-pixels-thick red outline     dc.drawcircle( wxpoint(200,100), 25 /* radius */ );     refresh();  } 

in frame connect event in event table

evt_paint(id_mini, minibitmap::paintevent) 

i create minibitmap type object dynamically in main frame constructor. don't know library, don't know making mistake. can panel child of panel? or maybe wrong connected events?