WINGs_tutorial/NinthWindow.c

   1 #include "editmenu.h"     /* This must be the MODIFIED .h file   */
   2 #include <sys/types.h>
   3 #include <sys/stat.h>
   4 #include <fcntl.h>
   5 #include <signal.h>
   6 #define WINWIDTH 300
   7 #define WINHEIGHT 400
   8 #define MENUWIDTH 85
   9 #define MENITEMHT 21
  10 #define LOGPROGRAM "xconsole"
  11 #define ERRMSGFIFO "/tmp/WINGsWindowfifo"
  12 #define FIFONAMELEN 20
  13 #define NOLOGWINDOW (-2)    /*  value when there is no console window   */
  14 #define FIFOERROR (-1)      /* value when there is a problem w/ console   */
  15 #define FIFOLOWESTPOSS 0
  16
  17
  18 int windowCounter=0;
  19 int fifonr;
  20 int sibpid;
  21 char fifofilename[FIFONAMELEN+5];
  22
  23 struct dataStruct{
  24  WMWindow *window;
  25  WEditMenu *menu;
  26 } dataStruct;
  27
  28
  29           /*    functions for the message window part:      */
  30
  31 void redirectmsg(int sig){
  32
  33   // clean up after SIGCHLD, and set fifonr to flag it
  34   fifonr=NOLOGWINDOW;
  35   if (!access(fifofilename,F_OK|W_OK))
  36     unlink(fifofilename);
  37   return;
  38 }
  39
  40
  41 int showMessageWindow(){
  42
  43  sprintf(fifofilename,"%s%i",ERRMSGFIFO,(unsigned short)getpid());
  44
  45  (void) signal(SIGCHLD,redirectmsg); // clean up if message console is killed
  46
  47  if(access(fifofilename,F_OK)==-1)
  48    fifonr=mknod(fifofilename,0640|O_EXCL|S_IFIFO,(dev_t)0);
  49   else {fifonr=FIFOERROR;
  50    wwarning("Fifo file already exists\n");
  51  }
  52  /* fifonr == FIFOERROR if mknod/mkfifo or access failed, mknod returns -1 on failure  */
  53
  54 if(fifonr!=FIFOERROR){
  55
  56  sibpid=fork();
  57  if(sibpid==0){
  58    execlp(LOGPROGRAM , LOGPROGRAM, "-file",fifofilename,"-geometry","250x400", "-title","Window Messages",(char *)0);
  59    exit(1);
  60 }else
  61   fifonr=open(fifofilename,O_WRONLY);
  62 }
  63   return fifonr;
  64 }
  65
  66        /*     general and menu handling functions            */
  67
  68 void closeAll(WMWidget *self,void *data){
  69
  70   WMDestroyWidget(self);
  71   if(--windowCounter<1){
  72     if (fifonr>=FIFOLOWESTPOSS)
  73       kill(sibpid,SIGTERM);
  74     if (!access(fifofilename,F_OK|W_OK))
  75      unlink(fifofilename);
  76     exit(0);
  77   }
  78 }
  79
  80
  81 void menuItemAction(void *self, void *data){
  82
  83   if (fifonr<FIFOLOWESTPOSS)fifonr=showMessageWindow();   // try again in case FIFOERROR
  84   if (fifonr==FIFOERROR)   // give up and print to stderr
  85     fprintf(stderr,"%i: %s selected\n", getpid(), WGetEditMenuItemTitle(self));
  86   else{
  87   char textbuffer[100];
  88     snprintf(textbuffer,100, "%i: %s selected\n", getpid(), WGetEditMenuItemTitle(self));
  89     write(fifonr, textbuffer,strlen(textbuffer));
  90   }
  91 }
  92
  93
  94 void menuItemCloseAction(void *self, void *data){
  95
  96   WMPostNotificationName("WMWindowClose", self, NULL);
  97 }
  98
  99
 100 void getMenu(WMWidget *self, void *data){
 101
 102 WMPoint position;
 103 struct dataStruct *tmp=(struct dataStruct *)data;
 104
 105  if(WMGetButtonSelected(self)){
 106    position=WMGetViewScreenPosition(WMWidgetView(tmp->window));
 107    WEditMenuShowAt(tmp->menu,(position.x>MENUWIDTH)?position.x-MENUWIDTH:0, position.y+MENITEMHT,tmp->window);
 108  }else{
 109    WEditMenuHide(tmp->menu);
 110    WDeselectItem(tmp->menu);             // remove selection before next pop up
 111   }
 112 }
 113
 114
 115 static void notificationHandler(void *self, WMNotification *notif){
 116
 117 if(!strcmp("WMWindowClose",WMGetNotificationName(notif)))
 118   closeAll(self,NULL);
 119 if(!strcmp(WMViewSizeDidChangeNotification,WMGetNotificationName(notif))){
 120   //resize actions
 121   WMSize size = WMGetViewSize(WMWidgetView(self));
 122  }
 123 }
 124
 125          /*       main widget creating functions       */
 126
 127 WMWindow * makeMainwindow(Display *display, WMScreen *screen){
 128 WMWindow *window;
 129
 130  window = WMCreateWindow(screen, "Menu");
 131  WMResizeWidget(window, WINWIDTH, WINHEIGHT);
 132  WMSetWindowCloseAction(window, closeAll, NULL);
 133  WMAddNotificationObserver(notificationHandler, window, "WMWindowClose", WMWidgetView(window));
 134  WMSetViewNotifySizeChanges(WMWidgetView(window), True);
 135  WMAddNotificationObserver(notificationHandler, window, WMViewSizeDidChangeNotification, WMWidgetView(window));
 136  WMAddNotificationObserver(notificationHandler, window, "WMWindowClose", NULL);
 137  WMRealizeWidget(window);
 138  return window;
 139 }
 140
 141
 142 WEditMenu * makeMenus(WMScreen *screen,WEditMenu *menu, WEditMenu *submenu){
 143 WEditMenuItem * menuitem;
 144
 145  submenu=WCreateEditMenu(screen,"Submenu");
 146  menuitem =WAddMenuItemWithTitle(submenu,"Submenu item");
 147  WSetEditMenuItemAction( menuitem, menuItemAction);
 148  menuitem =WAddMenuItemWithTitle(submenu,"2nd submenu item");
 149  WSetEditMenuItemAction( menuitem, menuItemAction);
 150  menuitem =WAddMenuItemWithTitle(submenu,"3d submenu item");
 151  WSetEditMenuItemAction( menuitem, menuItemAction);
 152  menu=WCreateEditMenu(screen,"Main menu");
 153  menuitem = WAddMenuItemWithTitle(menu,"1st main item");
 154  WSetEditMenuItemAction( menuitem, menuItemAction);
 155  menuitem = WAddMenuItemWithTitle(menu,"2nd main item");
 156  WSetEditMenuItemAction( menuitem, menuItemAction);
 157  menuitem = WAddMenuItemWithTitle(menu,"To submenu");
 158  WSetEditMenuSubmenu(menu, menuitem , submenu);
 159  menuitem = WAddMenuItemWithTitle(menu,"Quit");
 160  WSetEditMenuItemAction( menuitem, menuItemCloseAction);
 161  WMRealizeWidget(submenu);WMRealizeWidget(menu);
 162  return menu;
 163 }
 164
 165
 166 WMButton * makeButtonsTop( WMWidget *window, void *AppData){
 167 WMButton *Button;
 168
 169  Button =WMCreateButton(window,WBTPushOnPushOff);
 170  WMSetButtonText (Button, "Menu");
 171  WMSetButtonAction (Button, getMenu, AppData);
 172  WMMoveWidget(Button, 4,2);
 173  WMRealizeWidget(Button);
 174  return Button;
 175 }
 176
 177
 178 int main (int argc, char **argv){
 179
 180 Display *display;
 181 WMScreen *screen;
 182 WMWindow *mainwindow;
 183 WEditMenu *submenu, *menu;
 184 WEditMenuItem * menuitem;
 185 struct dataStruct Mainmenu;
 186 WMButton *menubutton;
 187
 188 fifonr=NOLOGWINDOW;
 189
 190 WMInitializeApplication("MenuWindow", &argc, argv);
 191 display = XOpenDisplay("");
 192 screen = WMCreateScreen(display, DefaultScreen(display));
 193 mainwindow= makeMainwindow(display, screen) ;
 194
 195 menu=makeMenus(screen,menu,submenu);
 196
 197 Mainmenu.window=mainwindow;
 198 Mainmenu.menu=menu;
 199 menubutton=makeButtonsTop(mainwindow, &Mainmenu);
 200
 201 WMMapSubwidgets(mainwindow);
 202 WMMapWidget(mainwindow);
 203
 204 WMScreenMainLoop(screen);
 205 return 0;
 206 }