text: /*
   * This file is part of the GROMACS molecular simulation package.
   *
   * Copyright (c) 1991-2000, University of Groningen, The Netherlands.
   * Copyright (c) 2001-2004, The GROMACS development team,
   * check out http://www.gromacs.org for more information.
   * Copyright (c) 2012,2013, by the GROMACS development team, led by
   * David van der Spoel, Berk Hess, Erik Lindahl, and including many
   * others, as listed in the AUTHORS file in the top-level source
   * directory and at http://www.gromacs.org.
   *
   * GROMACS is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public License
   * as published by the Free Software Foundation; either version 2.1
   * of the License, or (at your option) any later version.
   *
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   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
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   * You should have received a copy of the GNU Lesser General Public
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   * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
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   */
  #ifdef HAVE_CONFIG_H
  #include <config.h>
  #endif
  
  #include <string.h>
  #include <math.h>
  #include <macros.h>
  #include <smalloc.h>
  #include <x11.h>
  #include <xutil.h>
  #include "popup.h"
  
  gmx_bool ChildCallBack(t_x11 *x11, XEvent *event, Window w, void *data)
  {
      t_child   *child;
      t_mentry  *m;
      t_windata *wd;
      XEvent     letter;
  
      child = (t_child *)data;
      m     = child->m;
      wd    = &(child->wd);
      switch (event->type)
      {
          case Expose:
              XSetForeground(x11->disp, x11->gc, x11->fg);
              TextInRect(x11, w, m->str, 16, 0, wd->width-16-2, wd->height-2,
                         eXLeft, eYCenter);
              if (m->bChecked)
              {
                  int y = x11->font->ascent;
                  XDrawLine(x11->disp, w, x11->gc, 2, (y*2)/3, 6, y);
                  XDrawLine(x11->disp, w, x11->gc, 3, (y*2)/3, 7, y);
                  XDrawLine(x11->disp, w, x11->gc, 7, y, 12, 2);
              }
              break;
          case EnterNotify:
              LightBorder(x11->disp, w, x11->fg);
              break;
          case LeaveNotify:
              LightBorder(x11->disp, w, x11->bg);
              break;
          case ButtonRelease:
              letter.type                 = ClientMessage;
              letter.xclient.display      = x11->disp;
              letter.xclient.window       = m->send_to ? m->send_to : child->Parent;
              letter.xclient.message_type = 0;
              letter.xclient.format       = 32;
              letter.xclient.data.l[0]    = m->nreturn;
              XSendEvent(x11->disp, letter.xclient.window, True, 0, &letter);
              break;
          default:
              break;
      }
      return FALSE;
  }
  
  gmx_bool MenuCallBack(t_x11 *x11, XEvent *event, Window w, void *data)
  {
      t_menu *m;
  
      m = (t_menu *)data;
      switch (event->type)
      {
          case Expose:
              /* Nothing to be done */
              if (m->bGrabbed)
              {
                  m->bGrabbed =
                      GrabOK(stderr, XGrabPointer(x11->disp, m->wd.self, True,
                                                  ButtonReleaseMask, GrabModeAsync,
                                                  GrabModeAsync, m->wd.self, None, CurrentTime));
              }
              break;
          case ButtonRelease:
              hide_menu(x11, m);
              break;
          case ClientMessage:
              event->xclient.window = m->Parent;
              XSendEvent(x11->disp, m->Parent, True, 0, event);
              break;
          default:
              break;
      }
      return FALSE;
  }
  
  t_menu *init_menu(t_x11 *x11, Window Parent, unsigned long fg, unsigned long bg,
                    int nent, t_mentry ent[], int ncol)
  {
      int        i, mlen, mht, area, ht;
      int        j, k, l;
      int        frows, fcol;
      t_menu    *m;
      t_child   *kid;
      t_windata *w;
  
      snew(m, 1);
      m->nitem  = nent;
      m->Parent = Parent;
  
      /* Calculate dimensions of the menu */
      mlen = 0;
      for (i = 0; (i < nent); i++)
      {
          mlen = max(mlen, XTextWidth(x11->font, ent[i].str, strlen(ent[i].str)));
      }
      mht = XTextHeight(x11->font);
      /* Now we have the biggest single box, add a border of 2 pixels */
      mlen += 20; /* We need extra space at the left for checkmarks */
      mht  += 4;
      /* Calculate the area of the menu */
      area = mlen*mht;
      ht   = sqrt(area);
      /* No the number of rows per column, only beyond 8 rows */
      if (ncol == 0)
      {
          if (nent > 8)
          {
              frows = (1+ht/mht);
          }
          else
          {
              frows = nent;
          }
          fcol = nent/frows;
      }
      else
      {
          fcol  = ncol;
          frows = nent/ncol;
          if (nent % ncol)
          {
              frows++;
          }
      }
      InitWin(&(m->wd), 10, 10, fcol*mlen, frows*mht, 1, "Menu");
      snew(m->item, nent);
      m->wd.self = XCreateSimpleWindow(x11->disp, Parent,
                                       m->wd.x, m->wd.y,
                                       m->wd.width, m->wd.height,
                                       m->wd.bwidth, fg, bg);
      x11->RegisterCallback(x11, m->wd.self, Parent, MenuCallBack, m);
      x11->SetInputMask(x11, m->wd.self, ExposureMask |
                        OwnerGrabButtonMask | ButtonReleaseMask);
  
      for (j = l = 0; (j < fcol); j++)
      {
          for (k = 0; (k < frows) && (l < nent); k++, l++)
          {
              kid         = &(m->item[l]);
              kid->m      = &(ent[l]);
              kid->Parent = Parent;
              w           = &(kid->wd);
              InitWin(w, j*mlen, k*mht, mlen-2, mht-2, 1, NULL);
              w->self = XCreateSimpleWindow(x11->disp, m->wd.self,
                                            w->x, w->y, w->width, w->height,
                                            w->bwidth, bg, bg);
              x11->RegisterCallback(x11, w->self, m->wd.self,
                                    ChildCallBack, kid);
              x11->SetInputMask(x11, w->self,
                                ButtonPressMask | ButtonReleaseMask |
                                OwnerGrabButtonMask | ExposureMask |
                                EnterWindowMask | LeaveWindowMask);
          }
      }
  
      return m;
  }
  
  void show_menu(t_x11 *x11, t_menu *m, int x, int y, gmx_bool bGrab)
  {
      XMoveWindow(x11->disp, m->wd.self, x, y);
      m->bGrabbed = bGrab;
      XMapWindow(x11->disp, m->wd.self);
      XMapSubwindows(x11->disp, m->wd.self);
  }
  
  void hide_menu(t_x11 *x11, t_menu *m)
  {
      if (m->bGrabbed)
      {
          XUngrabPointer(x11->disp, CurrentTime);
      }
      XUnmapWindow(x11->disp, m->wd.self);
  }
  
  void check_menu_item(t_menu *m, int nreturn, gmx_bool bStatus)
  {
      int i;
  
      for (i = 0; (i < m->nitem); i++)
      {
          if (m->item[i].m->nreturn == nreturn)
          {
              m->item[i].m->bChecked = bStatus;
          }
      }
  }
  
  void done_menu(t_x11 *x11, t_menu *m)
  {
      int i;
  
      for (i = 0; (i < m->nitem); i++)
      {
          x11->UnRegisterCallback(x11, m->item[i].wd.self);
      }
      sfree(m->item);
      x11->UnRegisterCallback(x11, m->wd.self);
      sfree(m);
  }
  
  int menu_width(t_menu *m)
  {
      return m->wd.width;
  }
  
  int menu_height(t_menu *m)
  {
      return m->wd.height;
  }
  