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/*
************************
*
* Author & Copyright : Jean Souviron COGITECH Jean Souviron
* Date : 03/08/1996
*
************************
*/
#include <stdio.h>
#include <math.h>
#include <X11/Intrinsic.h>
#include <X11/Xatom.h>
#include <X11/StringDefs.h>
#include <Xm/Label.h>
#include <Xm/PushB.h>
#include <Xm/Text.h>
#include <Xm/Form.h>
/*-------------
Definition des nouvelles ressources
--------------*/
#define XtNcanalCommunication "Canal de communication"
/*-------------
Definition de structure de donnees client
--------------*/
typedef struct {
Atom *COMMUNICATION ;
Widget nom, message ;
Display **Noeuds ;
int N_Noeuds ;
Boolean Origine_Locale ;
} MyData ;
/*---------------
Routine qui envoie un Evenement (met a jour la propriete)
----------------*/
void EnvoieEvenement ( char *Message, MyData *cbdata )
{
cbdata->Origine_Locale = True ;
XChangeProperty ( cbdata->Noeuds[0], XDefaultRootWindow(cbdata->Noeuds[0]),
cbdata->COMMUNICATION[0], XA_STRING, 8, PropModeReplace,
(unsigned char *)Message, strlen(Message) );
}
/*---------------
Routine qui lit un Evenement sur un display quelconque
----------------*/
void Lit_Evenement (int Num, MyData *cbdata)
{
unsigned char *Retour ;
int Format ;
Atom Type ;
unsigned long Left, Nitems ;
if ( cbdata->Origine_Locale )
{
cbdata->Origine_Locale = False ;
return ;
}
if ( XGetWindowProperty(cbdata->Noeuds[Num], XDefaultRootWindow(cbdata->Noeuds[Num]),
cbdata->COMMUNICATION[Num], 0, 4, False, XA_STRING,
&Type, &Format, &Nitems, &Left, &Retour)
== Success)
{
XBell ( cbdata->Noeuds[Num], 75 );
fprintf(stderr, "\n J'ai recu le message ->%s<- ",Retour);
XFree(Retour);
}
}
/*---------------
Callbacks
----------------*/
/****
****/
XtCallbackProc SortieCB (Widget w, XtPointer client, XtPointer call )
{
fprintf(stderr, "\n");
exit(0);
}
/****
****/
XtCallbackProc EnvoiCB (Widget w, XtPointer client, XtPointer call )
{
MyData *cbdata = (MyData *)client ;
char *chaine = NULL ;
XtVaGetValues ( cbdata->message, XmNvalue, &chaine, NULL );
EnvoieEvenement( chaine, cbdata );
XtFree(chaine);
}
/****
****/
XtCallbackProc DemandeConnectionCB (Widget w, XtPointer client, XtPointer call )
{
MyData *cbdata = (MyData *)client ;
char *chaine = NULL ;
Display *disp, *tmp ;
Atom *tmpA ;
XtVaGetValues ( cbdata->nom, XmNvalue, &chaine, NULL );
if ( (chaine != NULL) && (strlen(chaine) != 0) )
{
cbdata->N_Noeuds = cbdata->N_Noeuds + 1 ;
tmp = (Display **) realloc(cbdata->Noeuds, cbdata->N_Noeuds*sizeof(XtPointer) );
if ( tmp == NULL )
{
fprintf ( stderr, "\nErreur de mémoire !!!");
exit(1);
}
cbdata->Noeuds = tmp ;
cbdata->Noeuds[cbdata->N_Noeuds-1] = XOpenDisplay (chaine);
disp = cbdata->Noeuds[cbdata->N_Noeuds-1];
XSelectInput(disp, XDefaultRootWindow(disp), PropertyChangeMask );
tmpA = (Atom *) realloc(cbdata->COMMUNICATION, cbdata->N_Noeuds*sizeof(Atom) );
if ( tmpA == NULL )
{
fprintf ( stderr, "\nErreur de mémoire !!!");
exit(1);
}
cbdata->COMMUNICATION = tmpA ;
cbdata->COMMUNICATION[cbdata->N_Noeuds-1] = XInternAtom ( disp, XtNcanalCommunication, False);
XtFree(chaine);
}
}
/*------------------
Initialisation des ressources dans le serveur
-------------------*/
void Init_Ressources ( Widget top, MyData *cbdata )
{
Window w ;
unsigned char Start[32] ;
w = XtWindow(top);
cbdata->COMMUNICATION[0] = XInternAtom ( XtDisplay(top), XtNcanalCommunication, False);
strcpy ( (char*)&Start[0], "Demarrage local" );
XChangeProperty ( XtDisplay(top), XDefaultRootWindow(cbdata->Noeuds[0]),
cbdata->COMMUNICATION[0], XA_STRING, 8, PropModeReplace,
Start, strlen((char*)Start) );
}
/*------------------
Interface
-------------------*/
Cree_Interface ( Widget parent, MyData *cbdata )
{
Widget label_nom, nom, demande, label_message, message, sortie, envoi;
/* libelle du nom du noeud */
label_nom = XtVaCreateManagedWidget ( "labelnom", xmLabelWidgetClass, parent,
XmNlabelString, XmStringCreateLocalized("Noeud a ecouter"),
XmNleftAttachment, XmATTACH_FORM, XmNleftOffset, 10,
XmNy, 10, NULL );
/* nom du noeud */
nom = XtVaCreateManagedWidget ( "nom", xmTextWidgetClass, parent, XmNwidth, 120,
XmNvalue, "", XmNbackground, XWhitePixelOfScreen(XtScreen(parent)),
XmNtopAttachment, XmATTACH_WIDGET,
XmNtopOffset, 2, XmNtopWidget, label_nom,
XmNleftAttachment, XmATTACH_FORM, XmNleftOffset, 10,
XmNrightAttachment, XmATTACH_FORM, XmNrightOffset, 10, NULL );
cbdata->nom = nom ;
/* bouton de demande de connection */
demande = XtVaCreateManagedWidget ( "demande", xmPushButtonWidgetClass, parent,
XmNtopAttachment, XmATTACH_WIDGET,
XmNtopOffset, 5, XmNtopWidget, nom,
XmNrightAttachment, XmATTACH_FORM, XmNrightOffset, 10,
XmNleftAttachment, XmATTACH_FORM, XmNleftOffset, 10,
XmNlabelString, XmStringCreateLocalized("Demande Connection"),
NULL );
XtAddCallback (demande, XmNactivateCallback, (XtCallbackProc)DemandeConnectionCB, (XtPointer)cbdata );
/* libelle du message */
label_message = XtVaCreateManagedWidget ( "labelmessage", xmLabelWidgetClass, parent,
XmNlabelString, XmStringCreateLocalized("Message a envoyer "),
XmNleftAttachment, XmATTACH_FORM, XmNleftOffset, 10,
XmNtopAttachment, XmATTACH_WIDGET,
XmNtopOffset, 20, XmNtopWidget, demande, NULL );
/* message */
message = XtVaCreateManagedWidget ( "message", xmTextWidgetClass, parent, XmNwidth, 120,
XmNvalue, "", XmNbackground, XWhitePixelOfScreen(XtScreen(parent)),
XmNtopAttachment, XmATTACH_WIDGET,
XmNtopOffset, 2, XmNtopWidget, label_message,
XmNleftAttachment, XmATTACH_FORM, XmNleftOffset, 10,
XmNrightAttachment, XmATTACH_FORM, XmNrightOffset, 10, NULL );
cbdata->message = message ;
/* bouton de demande de connection */
envoi = XtVaCreateManagedWidget ( "demande", xmPushButtonWidgetClass, parent,
XmNtopAttachment, XmATTACH_WIDGET,
XmNtopOffset, 5, XmNtopWidget, message,
XmNlabelString, XmStringCreateLocalized("Envoi"),
XmNrightAttachment, XmATTACH_FORM, XmNrightOffset, 10,
XmNleftAttachment, XmATTACH_FORM, XmNleftOffset, 10,
NULL );
XtAddCallback (envoi, XmNactivateCallback, (XtCallbackProc)EnvoiCB, (XtPointer)cbdata );
/* Bouton de sortie */
sortie = XtVaCreateManagedWidget ( "sortie", xmPushButtonWidgetClass, parent,
XmNtopAttachment, XmATTACH_WIDGET,
XmNtopOffset, 20, XmNtopWidget, envoi,
XmNleftAttachment, XmATTACH_OPPOSITE_WIDGET,
XmNleftWidget, envoi, XmNleftOffset, 0,
XmNbottomAttachment, XmATTACH_FORM,
XmNbottomOffset, 5,
XmNlabelString, XmStringCreateLocalized("Sortie"),
NULL );
XtAddCallback (sortie, XmNactivateCallback, (XtCallbackProc)SortieCB, (XtPointer)cbdata );
}
/*------------------
Programme principal
--------------------*/
int main (int argc, char *argv[])
{
XtAppContext app_con ;
Widget toplevel, fond ;
MyData Client ;
XEvent event ;
int i, j ;
/* Initialisation */
toplevel = XtAppInitialize ( &app_con, "JSCommunication", NULL, 0, &argc, argv,
NULL, NULL, 0 );
/* Cree le fond */
fond = XtVaCreateManagedWidget ( "Fond", xmFormWidgetClass, toplevel, NULL );
/* Cree le panneau */
Cree_Interface ( fond, &Client );
/* Realise l,interface et attend les evenements */
XtRealizeWidget (toplevel);
/* Initialise la structure de clientdata */
Client.Origine_Locale = False ;
Client.N_Noeuds = 1 ;
Client.Noeuds = (Display **)calloc(1, sizeof(XtPointer)) ;
if ( Clients.Noeuds == NULL )
{
fprintf ( stderr, "\nErreur de mémoire !!!");
exit(1);
}
Client.Noeuds[0] = XtDisplay(toplevel);
Client.COMMUNICATION = (Atom *) calloc (1, sizeof(Atom) );
if ( Clients.COMMUNICATION == NULL )
{
fprintf ( stderr, "\nErreur de mémoire !!!");
free(Client.Noeuds);
exit(1);
}
/* Initialise les ressources et selectionne le masque */
Init_Ressources ( toplevel, &Client );
XSelectInput(XtDisplay(toplevel), XDefaultRootWindow(XtDisplay(toplevel)),
PropertyChangeMask );
/* Attend les evenements et traite les changements de proprietes */
for ( ; ;)
{
for ( j = 0 ; j < Client.N_Noeuds ; j++ )
{
XNextEvent ( Client.Noeuds[j], &event );
switch ( event.type )
{
case PropertyNotify :
if (event.xproperty.atom == Client.COMMUNICATION[j] )
{
if ( Client.Origine_Locale )
Client.Origine_Locale = False ;
else
Lit_Evenement(j,&Client);
}
break ;
default : XtDispatchEvent (&event);
break ;
}
}
}
} |
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