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preview.cpp

Exemple d'utilisation des gtk_preview

#include <gtk++/gtkwindows.hpp>
#include <gtk++/gtkpreviews.hpp>
#include <math.h>

int main (int argc, char * argv [])
{
  guchar Points[100];

  // Initialisation des bibliothèques
  ::gtk_init (&argc, &argv);
  // Creation dela fenetre
  lgtkpp::gtk_window Window;
  // Le titre
  Window.SetTitle ("Test Preview");
  Window.SetBorderWidth (8);
  // Connexion des signaux
  Window.SignalConnect ("delete_event",GtkSignalFunc(gtk_main_quit), NULL);
  Window.SignalConnect ("destroy",GtkSignalFunc(gtk_main_quit), NULL);
  // Creation de la preview
  lgtkpp::gtk_preview Preview (GTK_PREVIEW_GRAYSCALE);
  Window += Preview;
  // Taille preview
  Preview.Size(100,100);
  // Trace de 100 lignes
  for (gint j=0; j < 100; j++)
    {
      // On commence par remplir le tableau
      for (gint i=0; i < 100; i++)
        Points[i] = guchar(191+64*sin(i*M_PI/25)*cos(j*M_PI/25));
      // On envoie la ligne dans la preview
      Preview.DrawRow(Points,0,j,100);
    }
  // Affichage et boucle principale
  Window.ShowAll();
  std::cout << Preview << std::endl;

  lgtkpp::gtk_preview_info Info = Preview.GetInfo();
  std::cout << "Visual = " << Info.Visual.GetType() <<", Correction Gamma = " << Info.Gamma << std::endl;
  ::gtk_main();
  return 0;
}

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