Hello,

I would like to use an boolean array "M".
Here is what I want to do:
-I fill the QTableWidget .
-After a click on the QPushButton "generer" the boolean array M receives the values that I fiiled in the QTableWidget.
-after a click on the QPushButton "dessiner" a second window is created "FenDessin" which contains a Draw related to the values of the boolean array M.
Here is the code:
Qt Code: 
  1. ///////////the Headers//////////////////////
  2. //FenPrinicipale.h
  3. #ifndef FENPRINCIPALE_H
  4. #define FENPRINCIPALE_H
  5. #include <QtGui>
  6.  
  7. class FenPrincipale : public QWidget
  8. {
  9.     Q_OBJECT
  10. public:
  11.     FenPrincipale();
  12.     bool  M[10][10];
  13. private slots:
  14.     void FillIn();
  15.     void FenetreDessin();
  16. private:
  17.     QTableWidget  *tabM;
  18.     QPushButton * generer;
  19.     QPushButton * dessiner;
  20.     QVBoxLayout * vbox;
  21. };
  22. #endif // FENPRINCIPALE_H
  23.  
  24.  
  25. //FenDessin.h
  26. #ifndef FENDESSIN_H
  27. #define FENDESSIN_H
  28. #include <QtGui>
  29. class FenDessin : public QDialog
  30. {
  31. public:
  32.     FenDessin ( QWidget *parent);
  33.  
  34. private:
  35.     QPushButton *fermer;
  36.     QPainter *painter;
  37. private slots:
  38.     void paintEvent (QPaintEvent *);
  39. };
  40. #endif // FENDESSIN_H
  41.  
  42.  
  43.  
  44. //FenPrincipale.cpp
  45. #include "qDebug.h"
  46. #include "FenPrincipale.h"
  47. #include "FenDessin.h"
  48. FenPrincipale::FenPrincipale()
  49. {
  50.     tabM =new QTableWidget(this);
  51.     tabM->setRowCount(10);
  52.     tabM->setColumnCount(10);
  53.     generer = new QPushButton("&Générer !",this);
  54.     QVBoxLayout* vbox = new QVBoxLayout();
  55.     vbox->addWidget(generer);
  56.     vbox->addWidget(dessiner);
  57.     vbox->addWidget(tabM);
  58.     this->setLayout(vbox);
  59.     for (int r = 0; r < 10; r++) {
  60.         for (int c = 0; c < 10; c++) {
  62.             tabM->setItem(r, c, it);
  63.             it->setData(Qt::EditRole, 0);
  64.  
  65.         }
  66.     }
  67.     connect(generer, SIGNAL(clicked()), this, SLOT(FillIn()));
  68. }
  69. void FenPrincipale::FillIn()
  70. {
  71.     for (int r = 0; r < 10; r++) {
  72.         for (int c = 0; c < 10; c++) {
  73.             QTableWidgetItem *it = tabM->item(r,c);;
  74.             Q_ASSERT(it);
  75.             qDebug() <<it;
  76.             int val = (it->data(Qt::EditRole)).toInt();
  77.             M[r][c] = (val == 1)? true: false;
  78.             qDebug() <<M[r][c];
  79.         }
  80.     }
  81.     connect(dessiner, SIGNAL(clicked()), this, SLOT(FenetreDessin()));
  82. }
  83. void FenPrincipale::FenetreDessin()
  84. {
  85.     FenDessin *fenetreCC = new FenDessin( this);
  86.     fenetreCC->exec();
  87. }
  88.  
  89.  
  90. //FenDessin.cpp
  91. #include "FenDessin.h"
  92. FenDessin::FenDessin( QWidget *parent = 0) :QDialog(parent)
  93. {
  94.     fermer = new QPushButton("Fermer",this);
  96.     paintEvent(c);
  97.     connect(fermer, SIGNAL(clicked()), this, SLOT(accept()));
  98.  
  99. }
  100. void FenDessin::paintEvent(QPaintEvent *c)
  101. {
  102.     QPainter painter(this);
  103.     int o,p;
  104.     for (o=0; o<10; o++)
  105.     {
  106.         for (p=0; p<10; p++)
  107.         {
  108.             M[o][p]=0;
  109.         }
  110.     }
  111.     int  tour=0;
  112.     int x=10;
  113.     int y=10;
  114.     int Num_Sommet=0;
  115.     int T_Coordonnees [10][3];
  116.     for (Num_Sommet=0; Num_Sommet<10; Num_Sommet++)
  117.     {
  118.         (T_Coordonnees[Num_Sommet][0])=x;
  119.         (T_Coordonnees[Num_Sommet][1])=y;
  120.         (T_Coordonnees[Num_Sommet][2])=tour;
  121.  
  122.         if (tour==0)
  123.         {
  124.             x+=35;
  125.             tour=1;
  126.         }
  127.         else
  128.         {
  129.             y+=55;
  130.             tour=0;
  131.         }
  132.  
  133.     }
  134.  
  135.     int w1=0;
  136.     int w2=0;
  137.     int cpt=10;
  138.     Num_Sommet=0;
  139.     for (Num_Sommet=0; Num_Sommet<10; Num_Sommet++)
  140.     {
  141.         if ( (T_Coordonnees[Num_Sommet][2])==1)
  142.         {   if(w1==0)
  143.             {
  144.                 (T_Coordonnees[Num_Sommet][0])=((T_Coordonnees[Num_Sommet][0])+500) ;
  145.                 w1=1;
  146.             }
  147.             else
  148.             {
  149.                 if(w1==1)
  150.                 {
  151.                     (T_Coordonnees[Num_Sommet][0])=((T_Coordonnees[Num_Sommet][0])+250+cpt) ;
  152.                     w1=0;
  153.                     cpt=cpt+15;
  154.                 }
  155.             }
  156.             if (Num_Sommet==9)
  157.             {
  158.                 (T_Coordonnees[Num_Sommet][0])=((T_Coordonnees[Num_Sommet][0])+45) ;
  159.             }
  160.  
  161.         }
  162.         else
  163.         {
  164.             if(w2==0)
  165.             {
  166.                 (T_Coordonnees[Num_Sommet][0])=(T_Coordonnees[Num_Sommet][0])+200;
  167.                 w2=1;
  168.             }
  169.             else
  170.             {
  171.                 (T_Coordonnees[Num_Sommet][0])=(T_Coordonnees[Num_Sommet][0])+100+cpt;
  172.                 w2=0;
  173.                 cpt=cpt+15;
  174.             }
  175.  
  176.             if (Num_Sommet==4)
  177.             {
  178.                 (T_Coordonnees[Num_Sommet][0])=((T_Coordonnees[Num_Sommet][0])+45) ;
  179.             }
  180.         }
  181.         painter.drawEllipse((T_Coordonnees[Num_Sommet][0]), (T_Coordonnees[Num_Sommet][1]), 30.0, 30.0);
  182.     }
  183.  
  184.     int i,j;
  185.     for (i=0; i<10; i++)
  186.     {
  187.         for (j=0; j<10; j++)
  188.         {
  189.             if (M[i][j]==1)
  190.             {
  191.                 painter.drawLine((T_Coordonnees[i][0]+20),(T_Coordonnees[i][1]),(T_Coordonnees[j][0]+20),(T_Coordonnees[j][1]));
  192.             }
  193.         }
  194.     }
  195.  
  196.  
  197.  
  198.     for (i=0; i<10; i++)
  199.     {
  200.         for (j=0; j<10; j++)
  201.         {
  202.             if ((M[i][j]==1) &&  (M[j][i]==1))
  203.             {
  204.                 painter.drawLine((T_Coordonnees[i][0]+20),(T_Coordonnees[i][1]),(T_Coordonnees[j][0]+20),(T_Coordonnees[j][1]));
  205.                 if(  (T_Coordonnees[i][1]>45)||(T_Coordonnees[j][1]>45)  )
  206.                 {
  207.                     painter.drawLine(((T_Coordonnees[i][0]+20)-10),(T_Coordonnees[i][1]),((T_Coordonnees[j][0]+20)-10),(T_Coordonnees[j][1]));
  208.                 }
  209.                 else
  210.                 {
  211.                     painter.drawLine((T_Coordonnees[i][0]+20),(T_Coordonnees[i][1]+30),(T_Coordonnees[j][0]+20),(T_Coordonnees[j][1]+30));
  212.                 }
  213.             }
  214.         }
  215.     }
  216.     ////////////////////////////////////////////////
  217.     Num_Sommet=0;
  218.     for (Num_Sommet=0; Num_Sommet<10; Num_Sommet++)
  219.     {
  220.         QPoint point = QPoint( (((T_Coordonnees[Num_Sommet][0])+15)), ((T_Coordonnees[Num_Sommet][1])+15) );
  221.         QString str;
  222.         str.setNum(Num_Sommet);
  223.         painter.drawText( point,str);
  224.  
  225.     }
  226. }
  227.  
  228. //main.cpp
  229. #include <QApplication>
  230. #include "FenPrincipale.h"
  231. int main(int argc, char* argv[])
  232. {
  233.     QApplication app(argc, argv);
  234.     FenPrincipale fenetre;
  235.     fenetre.show();
  236.     return app.exec();
  237. }
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I would like to declare the array M as a global variable so that the class FenDessin can use it to make the drawing without the error:
" M is not declared in this scope"
Thank you for the attention given to this message.