src/Fl_Window_hotspot.cxx

   1 //
   2 // "$Id: Fl_Window_hotspot.cxx 7903 2010-11-28 21:06:39Z matt $"
   3 //
   4 // Common hotspot routines for the Fast Light Tool Kit (FLTK).
   5 //
   6 // Copyright 1998-2010 by Bill Spitzak and others.
   7 //
   8 // This library is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU Library General Public
  10 // License as published by the Free Software Foundation; either
  11 // version 2 of the License, or (at your option) any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // Library General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU Library General Public
  19 // License along with this library; if not, write to the Free Software
  20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21 // USA.
  22 //
  23 // Please report all bugs and problems on the following page:
  24 //
  25 //     http://www.fltk.org/str.php
  26 //
  27
  28 #include <FL/Fl.H>
  29 #include <FL/Fl_Window.H>
  30 #include <FL/x.H>
  31 #include <stdio.h>
  32
  33 void Fl_Window::hotspot(int X, int Y, int offscreen) {
  34   int mx,my;
  35
  36   // Update the screen position based on the mouse position.
  37   Fl::get_mouse(mx,my);
  38   X = mx-X; Y = my-Y;
  39
  40   // If offscreen is 0 (the default), make sure that the window
  41   // stays on the screen, if possible.
  42   if (!offscreen) {
  43     int scr_x, scr_y, scr_w, scr_h;
  44     Fl::screen_xywh(scr_x, scr_y, scr_w, scr_h);
  45
  46     int top = 0;
  47     int left = 0;
  48     int right = 0;
  49     int bottom = 0;
  50
  51     if (border()) {
  52 #ifdef WIN32
  53       if (size_range_set && (maxw != minw || maxh != minh)) {
  54         left = right = GetSystemMetrics(SM_CXSIZEFRAME);
  55         top = bottom = GetSystemMetrics(SM_CYSIZEFRAME);
  56       } else {
  57         left = right = GetSystemMetrics(SM_CXFIXEDFRAME);
  58         top = bottom = GetSystemMetrics(SM_CYFIXEDFRAME);
  59       }
  60       top += GetSystemMetrics(SM_CYCAPTION);
  61 #elif defined(__APPLE__)
  62       top = 24;
  63       left = 2;
  64       right = 2;
  65       bottom = 2;
  66 #else
  67       // Ensure border is on screen; these values are generic enough
  68       // to work with many window managers, and are based on KDE defaults.
  69       top = 20;
  70       left = 4;
  71       right = 4;
  72       bottom = 8;
  73 #endif
  74     }
  75     // now insure contents are on-screen (more important than border):
  76     if (X+w()+right > scr_w-scr_x) X = scr_w-scr_x-right-w();
  77     if (X-left < scr_x) X = left;
  78     if (Y+h()+bottom > scr_h-scr_y) Y = scr_h-scr_y-bottom-h();
  79     if (Y-top < scr_y) Y = top;
  80     // make sure that we will force this position
  81     if (X==x()) x(X-1);
  82   }
  83
  84   position(X,Y);
  85 }
  86
  87 void Fl_Window::hotspot(const Fl_Widget *o, int offscreen) {
  88   int X = o->w()/2;
  89   int Y = o->h()/2;
  90   while (o != this && o) {
  91     X += o->x(); Y += o->y();
  92     o = o->window();
  93   }
  94   hotspot(X,Y,offscreen);
  95 }
  96
  97
  98 //
  99 // End of "$Id: Fl_Window_hotspot.cxx 7903 2010-11-28 21:06:39Z matt $".
 100 //