Fl_get_key_win32.cxx

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//
// "$Id: Fl_get_key_win32.cxx 7913 2010-11-29 18:18:27Z greg.ercolano $"
//
// WIN32 keyboard state routines for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

// Return the current state of a key.  Keys are named by fltk symbols,
// which are actually X keysyms.  So this has to translate to MSWindows
// VK_x symbols.

#include <FL/Fl.H>
#include <FL/x.H>

// convert an Fltk (X) keysym to a MSWindows VK symbol:
// See also the inverse converter in Fl_win32.cxx
// This table is in numeric order by Fltk symbol order for binary search:

static const struct {unsigned short vk, fltk;} vktab[] = {
  {VK_SPACE,    ' '},
  {'1',         '!'},
  {0xde,        '\"'},
  {'3',         '#'},
  {'4',         '$'},
  {'5',         '%'},
  {'7',         '&'},
  {0xde,        '\''},
  {'9',         '('},
  {'0',         ')'},
  {'8',         '*'},
  {0xbb,        '+'},
  {0xbc,        ','},
  {0xbd,        '-'},
  {0xbe,        '.'},
  {0xbf,        '/'},
  {0xba,        ':'},
  {0xba,        ';'},
  {0xbc,        '<'},
  {0xbb,        '='},
  {0xbe,        '>'},
  {0xbf,        '?'},
  {'2',         '@'},
  {0xdb,        '['},
  {0xdc,        '\\'},
  {0xdd,        ']'},
  {'6',         '^'},
  {0xbd,        '_'},
  {0xc0,        '`'},
  {0xdb,        '{'},
  {0xdc,        '|'},
  {0xdd,        '}'},
  {0xc0,        '~'},
  {VK_BACK,     FL_BackSpace},
  {VK_TAB,      FL_Tab},
  {VK_CLEAR,    0xff0b/*XK_Clear*/},
  {VK_RETURN,   FL_Enter},
  {VK_PAUSE,    FL_Pause},
  {VK_SCROLL,   FL_Scroll_Lock},
  {VK_ESCAPE,   FL_Escape},
  {VK_HOME,     FL_Home},
  {VK_LEFT,     FL_Left},
  {VK_UP,       FL_Up},
  {VK_RIGHT,    FL_Right},
  {VK_DOWN,     FL_Down},
  {VK_PRIOR,    FL_Page_Up},
  {VK_NEXT,     FL_Page_Down},
  {VK_END,      FL_End},
  {VK_SNAPSHOT, FL_Print},
  {VK_INSERT,   FL_Insert},
  {VK_APPS,     FL_Menu},
  {VK_NUMLOCK,  FL_Num_Lock},
//{VK_???,      FL_KP_Enter},
  {VK_MULTIPLY, FL_KP+'*'},
  {VK_ADD,      FL_KP+'+'},
  {VK_SUBTRACT, FL_KP+'-'},
  {VK_DECIMAL,  FL_KP+'.'},
  {VK_DIVIDE,   FL_KP+'/'},
  {VK_LSHIFT,   FL_Shift_L},
  {VK_RSHIFT,   FL_Shift_R},
  {VK_LCONTROL, FL_Control_L},
  {VK_RCONTROL, FL_Control_R},
  {VK_CAPITAL,  FL_Caps_Lock},
  {VK_LWIN,     FL_Meta_L},
  {VK_RWIN,     FL_Meta_R},
  {VK_LMENU,    FL_Alt_L},
  {VK_RMENU,    FL_Alt_R},
  {VK_DELETE,   FL_Delete}
};

static int fltk2ms(int fltk) {
  if (fltk >= '0' && fltk <= '9') return fltk;
  if (fltk >= 'A' && fltk <= 'Z') return fltk;
  if (fltk >= 'a' && fltk <= 'z') return fltk-('a'-'A');
  if (fltk > FL_F && fltk <= FL_F+16) return fltk-(FL_F-(VK_F1-1));
  if (fltk >= FL_KP+'0' && fltk<=FL_KP+'9') return fltk-(FL_KP+'0'-VK_NUMPAD0);
  int a = 0;
  int b = sizeof(vktab)/sizeof(*vktab);
  while (a < b) {
    int c = (a+b)/2;
    if (vktab[c].fltk == fltk) return vktab[c].vk;
    if (vktab[c].fltk < fltk) a = c+1; else b = c;
  }
  return 0;
}

int Fl::event_key(int k) {
  return GetKeyState(fltk2ms(k))&~1;
}

int Fl::get_key(int k) {
  uchar foo[256];
  GetKeyboardState(foo);
  return foo[fltk2ms(k)]&~1;
}

//
// End of "$Id: Fl_get_key_win32.cxx 7913 2010-11-29 18:18:27Z greg.ercolano $".
//