text: /*
   * This file is part of the GROMACS molecular simulation package.
   *
   * Copyright (c) 1991-2000, University of Groningen, The Netherlands.
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   * Copyright (c) 2013,2014,2015,2019,2020, by the GROMACS development team, led by
   * Mark Abraham, David van der Spoel, Berk Hess, and 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
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   */
  #include "gmxpre.h"
  
  #include "buttons.h"
  
  #include <cstdlib>
  #include <cstring>
  
  #include <algorithm>
  
  #include "gromacs/utility/cstringutil.h"
  #include "gromacs/utility/smalloc.h"
  
  #include "ff.bm"
  #include "play.bm"
  #include "rewind.bm"
  #include "stop_ani.bm"
  #include "x11.h"
  #include "xutil.h"
  
  static void move_bbox(t_x11* x11, t_butbox* bbox)
  {
      int        x0, y0;
      int        i, bw;
      real       idb, bh, one = 1.0;
      t_windata* wd;
  
      bw  = std::max(1, bbox->wd.width - 2 * (AIR + BORDER));
      idb = bbox->nbut;
      bh  = (bbox->wd.height - AIR * (bbox->nbut + 1));
      bh /= idb;
      bh = std::max(bh, one);
  
      x0 = AIR;
      y0 = AIR;
      for (i = 0; (i < bbox->nbut); i++)
      {
          wd         = &(bbox->b[i].wd);
          wd->width  = bw;
          wd->height = bh;
          wd->color  = WHITE;
          XMoveWindow(x11->disp, wd->self, x0, y0);
          XResizeWindow(x11->disp, wd->self, wd->width, wd->height);
          y0 += AIR + bh;
      }
  }
  
  static bool BBCallBack(t_x11* x11, XEvent* event, Window /*w*/, void* data)
  {
      t_butbox* bbox;
  
      if (event->type == ConfigureNotify)
      {
          bbox            = (t_butbox*)data;
          bbox->wd.width  = event->xconfigure.width;
          bbox->wd.height = event->xconfigure.height;
          move_bbox(x11, bbox);
      }
      return false;
  }
  
  static bool VBCallBack(t_x11* x11, XEvent* event, Window /*w*/, void* data)
  {
      t_butbox* vbox;
      int       y0;
  
      if (event->type == Expose)
      {
          vbox = (t_butbox*)data;
          y0   = XTextHeight(x11->font) + 2 * AIR + 1;
          XSetForeground(x11->disp, x11->gc, WHITE);
          XClearArea(x11->disp, vbox->wd.self, 1, 1, vbox->wd.width - 2, y0 - 1, False);
          TextInRect(x11, vbox->wd.self, vbox->wd.text, 1, 1, vbox->wd.width - 2, y0 - 1, eXLeft, eYCenter);
          XDrawLine(x11->disp, vbox->wd.self, x11->gc, 0, y0, vbox->wd.width, y0);
          XSetForeground(x11->disp, x11->gc, x11->fg);
      }
      return false;
  }
  
  void set_vbtime(t_x11* x11, t_butbox* vbox, char* text)
  {
      sfree(vbox->wd.text);
      vbox->wd.text = gmx_strdup(text);
      ExposeWin(x11->disp, vbox->wd.self);
  }
  
  static bool ButtonCallBack(t_x11* x11, XEvent* event, Window /*w*/, void* data)
  {
      XEvent     letter;
      t_mwbut*   but;
      t_windata* wd;
  
      but = (t_mwbut*)data;
      wd  = &(but->wd);
      switch (event->type)
      {
          case Expose:
              XSetForeground(x11->disp, x11->gc, WHITE);
              XDrawRoundRect(x11->disp, wd->self, x11->gc, 0, 0, wd->width - 1, wd->height - 1);
              TextInWin(x11, wd, wd->text, eXCenter, eYCenter);
              XSetForeground(x11->disp, x11->gc, x11->fg);
              break;
  
          case EnterNotify:
              /*    LightBorder(x11->disp,wd->self,WHITE);*/
              XSetForeground(x11->disp, x11->gc, WHITE);
              XDrawRoundRect(x11->disp, wd->self, x11->gc, 1, 1, wd->width - 3, wd->height - 3);
              XSetForeground(x11->disp, x11->gc, x11->fg);
              break;
          case LeaveNotify:
              /*    LightBorder(x11->disp,wd->self,BLUE);*/
              XSetForeground(x11->disp, x11->gc, BLUE);
              XDrawRoundRect(x11->disp, wd->self, x11->gc, 1, 1, wd->width - 3, wd->height - 3);
              XSetForeground(x11->disp, x11->gc, x11->fg);
  
              break;
  
          case ButtonPress:
              letter.type                 = ClientMessage;
              letter.xclient.display      = x11->disp;
              letter.xclient.window       = wd->Parent;
              letter.xclient.message_type = 0;
              letter.xclient.format       = 32;
              letter.xclient.data.l[0]    = but->ID;
              letter.xclient.data.l[1]    = (long)event->xbutton.button;
              XSendEvent(x11->disp, wd->Parent, True, 0, &letter);
              break;
          default: break;
      }
      return false;
  }
  
  t_butbox* init_vbox(t_x11* x11, Window Parent, Window SendTo, unsigned long fg, unsigned long bg)
  {
      Pixmap         pm;
      unsigned char* data;
      t_butbox*      vb;
      int            i, ID, x, y0;
  
      snew(vb, 1);
      vb->nbut = IDNR - IDBUTNR - 1;
      snew(vb->b, vb->nbut);
  
      /* VBox holder */
      y0 = XTextHeight(x11->font) + 2 * AIR + 2;
      InitWin(&vb->wd,
              0,
              0,
              vb->nbut * (play_width + AIR) + AIR,
              y0 + play_height + 2 * AIR,
              1,
              "VCR - Control");
      vb->wd.self = XCreateSimpleWindow(
              x11->disp, Parent, vb->wd.x, vb->wd.y, vb->wd.width, vb->wd.height, vb->wd.bwidth, fg, bg);
      x11->RegisterCallback(x11, vb->wd.self, Parent, VBCallBack, vb);
      x11->SetInputMask(x11, vb->wd.self, ExposureMask);
  
      x = AIR;
      (void)CWBackPixmap;
      for (i = 0; (i < vb->nbut); i++)
      {
          ID = IDBUTNR + i + 1;
          switch (ID)
          {
              case IDREWIND: data = &(rewind_bits[0]); break;
              case IDSTEP: data = play_bits; break;
              case IDFF: data = ff_bits; break;
              case IDSTOP_ANI: data = stop_ani_bits; break;
              default: fprintf(stderr, "Invalid bitmap in init_vbox %d\n", ID); std::exit(1);
          }
          /* Rely on the fact that all bitmaps are equal size */
          pm = XCreatePixmapFromBitmapData(
                  x11->disp, x11->root, (char*)data, play_width, play_height, BLACK, LIGHTGREY, x11->depth);
          vb->b[i].ID        = ID;
          vb->b[i].wd.Parent = SendTo;
          vb->b[i].wd.self   = XCreateSimpleWindow(
                  x11->disp, vb->wd.self, x, y0 + AIR, play_width, play_height, 0, WHITE, BLACK);
          XSetWindowBackgroundPixmap(x11->disp, vb->b[i].wd.self, pm);
  
          x11->RegisterCallback(x11, vb->b[i].wd.self, vb->wd.self, ButtonCallBack, &(vb->b[i]));
          x11->SetInputMask(x11, vb->b[i].wd.self, ButtonPressMask | StructureNotifyMask);
          x += play_width + AIR;
      }
  
      return vb;
  }
  
  void show_but(t_x11* x11, t_butbox* bbox)
  {
      XMapWindow(x11->disp, bbox->wd.self);
      XMapSubwindows(x11->disp, bbox->wd.self);
  }
  
  void hide_but(t_x11* x11, t_butbox* bbox)
  {
      XUnmapWindow(x11->disp, bbox->wd.self);
      XUnmapSubwindows(x11->disp, bbox->wd.self);
  }
  
  t_butbox* init_bbox(t_x11* x11, Window Parent, Window SendTo, int width, unsigned long fg, unsigned long bg)
  {
      t_butbox*          bbox;
      static const char* lbut[IDBUTNR] = {
          "< X-Rotate >", "< Y-Rotate >", "< Z-Rotate >", "< X-Move >",
          "< Y-Move >",   "< Z-Move >",   "< Scale >",
      };
      int      i, y0, h0;
      t_mwbut* but;
      Window   DrawOn;
  
      snew(bbox, 1);
      bbox->nbut = IDBUTNR;
      snew(bbox->b, bbox->nbut);
      y0 = XTextHeight(x11->font) + 2 * (AIR + BORDER);
  
      InitWin(&(bbox->wd), 0, 0, /*width,(y0+AIR)*IDBUTNR+AIR+2*BORDER,*/ 1, 1, 1, "Button Box");
      width -= 2 * AIR + 2 * BORDER;
      bbox->wd.self = XCreateSimpleWindow(
              x11->disp, Parent, bbox->wd.x, bbox->wd.y, bbox->wd.width, bbox->wd.height, bbox->wd.bwidth, fg, bg);
      x11->RegisterCallback(x11, bbox->wd.self, Parent, BBCallBack, bbox);
      x11->SetInputMask(x11, bbox->wd.self, StructureNotifyMask);
  
      DrawOn = bbox->wd.self;
      h0     = AIR;
      for (i = 0; (i < bbox->nbut); i++)
      {
          but = &(bbox->b[i]);
          InitWin(&but->wd, AIR, h0, width, y0, 1, lbut[i]);
          h0 += y0 + AIR;
          but->wd.Parent = SendTo;
          but->ID        = i;
          but->wd.self   = XCreateSimpleWindow(
                  x11->disp, DrawOn, but->wd.x, but->wd.y, but->wd.width, but->wd.height, but->wd.bwidth, bg, bg);
          x11->RegisterCallback(x11, but->wd.self, DrawOn, ButtonCallBack, but);
          x11->SetInputMask(x11, but->wd.self, ExposureMask | ButtonPressMask | EnterLeave);
      }
      return bbox;
  }
  
  void done_bbox(t_x11* x11, t_butbox* bbox)
  {
      int i;
  
      for (i = 0; (i < bbox->nbut); i++)
      {
          x11->UnRegisterCallback(x11, bbox->b[i].wd.self);
      }
      x11->UnRegisterCallback(x11, bbox->wd.self);
      sfree(bbox->b);
      sfree(bbox);
  }
  