#define MARGIN  14
#define WINWIDTH 300
#define WINHEIGHT 400

Display *display;
WMScreen *screen;

WMButton *Button; 
WMWindow *win;
WMSize ButtonsetSize;

WMBox *box;
WMText *text;
WMColor *color;

void closeAll(WMWidget *self,void *data)
{
  WMDestroyWidget(self);
  fprintf(stderr, "I've been used!\n");
  exit(0);
}

static void selectFiles(void *self, void *data)
{
     WMOpenPanel *oPanel;
     oPanel = WMGetOpenPanel(screen);
     if (WMRunModalFilePanelForDirectory(oPanel, NULL, "/tmp",
                                         "Search..", NULL) == True) {
          char textbuf[40];

          snprintf(textbuf, sizeof(textbuf), "%s\n-", WMGetFilePanelFileName(oPanel));
          WMFreezeText(text);
          WMAppendTextStream(text, textbuf);
          WMThawText(text);
     }
     return;
}

static void handleEvents(XEvent *event, void *data)
{
  WMWidget *widget = (WMWidget*) data;
  char textbuf[40];

  switch (event->type) {
  case ButtonPress:
    snprintf(textbuf, sizeof(textbuf), "Button down at (%i,%i) \n-",
             event->xbutton.x, event->xbutton.y);
    WMFreezeText(text);
    WMAppendTextStream(text, textbuf);
    WMThawText(text);
    break;
  }
}

static void resizeHandler(void *self, WMNotification *notif)
{
     WMSize size = WMGetViewSize(WMWidgetView(win));   
     WMMoveWidget(box, size.width - ButtonsetSize.width, size.height - ButtonsetSize.height);
     WMResizeWidget(text, size.width - MARGIN - 10, size.height - 80);
}


int main(int argc, char **argv)
{
   WMInitializeApplication("FourthWindow", &argc, argv);
   if (!(display = XOpenDisplay(""))) {
      fprintf(stderr, "err: cannot open display");
      exit(-1);
   }
   screen = WMCreateScreen(display, DefaultScreen(display));

   /*    window    */
   win = WMCreateWindow(screen, "");
   WMResizeWidget(win, WINWIDTH, WINHEIGHT);
   WMSetWindowCloseAction(win, closeAll, NULL);

   color = WMCreateRGBColor(screen, 124<<9, 206<<8, 162<<8, False);
   WMSetWidgetBackgroundColor((WMWidget *)win, color);
 
   WMCreateEventHandler(WMWidgetView(win), ButtonPressMask, handleEvents, win);
   WMSetViewNotifySizeChanges(WMWidgetView(win), True);
   WMAddNotificationObserver(resizeHandler, NULL, WMViewSizeDidChangeNotification, WMWidgetView(win));

   /* Text area */
   text = WMCreateText(win);
   WMResizeWidget(text, WINWIDTH - MARGIN, WINHEIGHT - 80);
   WMMoveWidget(text, 10, 10);
   WMSetTextHasVerticalScroller(text, True);
   WMSetTextEditable(text, False);
   WMSetTextIgnoresNewline(text, False);

   /* box with buttons */
   box = WMCreateBox(win);
   WMSetBoxBorderWidth(box, MARGIN);
   WMSetWidgetBackgroundColor((WMWidget *)box, color);
   WMSetBoxHorizontal(box, True);  

   Button = WMCreateButton(box, WBTMomentaryPush);
   WMSetWidgetBackgroundColor((WMWidget *)Button, color);
   WMSetButtonText(Button, "Files");
   WMSetButtonAction(Button, selectFiles, NULL);
   WMMapWidget(Button);
   ButtonsetSize = WMGetViewSize(WMWidgetView(Button));       

   WMAddBoxSubview(box, WMWidgetView(Button), True, False, 60, 1000, MARGIN);
 
   Button = WMCreateButton(box, WBTMomentaryPush);
   WMSetWidgetBackgroundColor((WMWidget *)Button, color);
   WMSetButtonText(Button, "Quit");
   WMSetButtonAction(Button, closeAll, NULL);
   WMMapWidget(Button);

   WMAddBoxSubview(box, WMWidgetView(Button), True, False, 60, 1000, 0);
   WMResizeWidget(box, 4 * MARGIN + 2 * ButtonsetSize.width,
                  2 * MARGIN + ButtonsetSize.height);
   ButtonsetSize = WMGetViewSize(WMWidgetView(box));
   resizeHandler(NULL, NULL);
   /* end of box and buttons setup */

   WMMapWidget(win);

   WMMapSubwidgets(win);
   WMRealizeWidget(win);

   WMScreenMainLoop(screen);

   return 0;
}