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 {
  50     fifonr = FIFOERROR;
  51     wwarning("Fifo file already exists\n");
  52   }
  53   /* fifonr == FIFOERROR if mknod/mkfifo or access failed, mknod returns -1 on failure  */
  54
  55   if (fifonr != FIFOERROR) {
  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)
  84     fifonr = showMessageWindow();   // try again in case FIFOERROR
  85
  86   if (fifonr == FIFOERROR)   // give up and print to stderr
  87     fprintf(stderr, "%i: %s selected\n", getpid(), WGetEditMenuItemTitle(self));
  88   else {
  89     char textbuffer[100];
  90
  91     snprintf(textbuffer, sizeof(textbuffer), "%i: %s selected\n", getpid(), WGetEditMenuItemTitle(self));
  92     write(fifonr, textbuffer, strlen(textbuffer));
  93   }
  94 }
  95
  96
  97 void menuItemCloseAction(void *self, void *data)
  98 {
  99   WMPostNotificationName("WMWindowClose", self, NULL);
 100 }
 101
 102
 103 void getMenu(WMWidget *self, void *data)
 104 {
 105   WMPoint position;
 106   struct dataStruct *tmp = (struct dataStruct *) data;
 107
 108   if (WMGetButtonSelected(self)) {
 109     position = WMGetViewScreenPosition(WMWidgetView(tmp->window));
 110     WEditMenuShowAt(tmp->menu,
 111                     (position.x > MENUWIDTH)?(position.x - MENUWIDTH):0,
 112                     position.y + MENITEMHT, tmp->window);
 113   } else {
 114     WEditMenuHide(tmp->menu);
 115     WDeselectItem(tmp->menu);             // remove selection before next pop up
 116   }
 117 }
 118
 119
 120 static void notificationHandler(void *self, WMNotification *notif)
 121 {
 122   if(!strcmp("WMWindowClose", WMGetNotificationName(notif)))
 123     closeAll(self, NULL);
 124   if(!strcmp(WMViewSizeDidChangeNotification, WMGetNotificationName(notif))) {
 125     //resize actions
 126     WMSize size = WMGetViewSize(WMWidgetView(self));
 127   }
 128 }
 129
 130          /*       main widget creating functions       */
 131
 132 WMWindow * makeMainwindow(Display *display, WMScreen *screen)
 133 {
 134   WMWindow *window;
 135
 136   window = WMCreateWindow(screen, "Menu");
 137   WMResizeWidget(window, WINWIDTH, WINHEIGHT);
 138   WMSetWindowCloseAction(window, closeAll, NULL);
 139   WMAddNotificationObserver(notificationHandler, window, "WMWindowClose", WMWidgetView(window));
 140   WMSetViewNotifySizeChanges(WMWidgetView(window), True);
 141   WMAddNotificationObserver(notificationHandler, window, WMViewSizeDidChangeNotification, WMWidgetView(window));
 142   WMAddNotificationObserver(notificationHandler, window, "WMWindowClose", NULL);
 143   WMRealizeWidget(window);
 144   return window;
 145 }
 146
 147
 148 WEditMenu * makeMenus(WMScreen *screen, WEditMenu *menu, WEditMenu *submenu)
 149 {
 150   WEditMenuItem *menuitem;
 151
 152   submenu = WCreateEditMenu(screen, "Submenu");
 153   menuitem = WAddMenuItemWithTitle(submenu, "Submenu item");
 154   WSetEditMenuItemAction(menuitem, menuItemAction);
 155   menuitem = WAddMenuItemWithTitle(submenu, "2nd submenu item");
 156   WSetEditMenuItemAction(menuitem, menuItemAction);
 157   menuitem = WAddMenuItemWithTitle(submenu, "3rd submenu item");
 158   WSetEditMenuItemAction(menuitem, menuItemAction);
 159   menu = WCreateEditMenu(screen, "Main menu");
 160   menuitem = WAddMenuItemWithTitle(menu, "1st main item");
 161   WSetEditMenuItemAction(menuitem, menuItemAction);
 162   menuitem = WAddMenuItemWithTitle(menu, "2nd main item");
 163   WSetEditMenuItemAction(menuitem, menuItemAction);
 164   menuitem = WAddMenuItemWithTitle(menu, "To submenu");
 165   WSetEditMenuSubmenu(menu, menuitem, submenu);
 166   menuitem = WAddMenuItemWithTitle(menu, "Quit");
 167   WSetEditMenuItemAction(menuitem, menuItemCloseAction);
 168   WMRealizeWidget(submenu);
 169   WMRealizeWidget(menu);
 170   return menu;
 171 }
 172
 173
 174 WMButton * makeButtonsTop(WMWidget *window, void *AppData)
 175 {
 176   WMButton *Button;
 177
 178   Button = WMCreateButton(window, WBTPushOnPushOff);
 179   WMSetButtonText(Button, "Menu");
 180   WMSetButtonAction(Button, getMenu, AppData);
 181   WMMoveWidget(Button, 4, 2);
 182   WMRealizeWidget(Button);
 183   return Button;
 184 }
 185
 186
 187 int main(int argc, char **argv)
 188 {
 189   Display *display;
 190   WMScreen *screen;
 191   WMWindow *mainwindow;
 192   WEditMenu *submenu, *menu;
 193   WEditMenuItem *menuitem;
 194   struct dataStruct Mainmenu;
 195   WMButton *menubutton;
 196
 197   fifonr = NOLOGWINDOW;
 198
 199   WMInitializeApplication("MenuWindow", &argc, argv);
 200   display = XOpenDisplay("");
 201   screen = WMCreateScreen(display, DefaultScreen(display));
 202   mainwindow = makeMainwindow(display, screen);
 203
 204   menu = makeMenus(screen, menu, submenu);
 205
 206   Mainmenu.window = mainwindow;
 207   Mainmenu.menu = menu;
 208   menubutton = makeButtonsTop(mainwindow, &Mainmenu);
 209
 210   WMMapSubwidgets(mainwindow);
 211   WMMapWidget(mainwindow);
 212
 213   WMScreenMainLoop(screen);
 214   return 0;
 215 }