Mercurial > octave
view libinterp/corefcn/display.h @ 23432:e35a5c1233d0
maint: Use convention 'int *x' for naming pointers.
* annotation-dialog.h, files-dock-widget.cc, find-files-dialog.cc,
find-files-dialog.h, file-editor.cc, file-editor.h, main-window.cc,
main-window.h, octave-dock-widget.cc, parser.h, settings-dialog.h,
load-save.cc, mex.cc, pr-output.cc, symtab.cc, __ode15__.cc, ov-bool-sparse.cc,
ov-cx-sparse.cc, ov-fcn-inline.cc, ov-re-sparse.cc, Sparse.cc, idx-vector.cc,
idx-vector.h: Use convention 'int *x' for naming pointers.
author | Rik <rik@octave.org> |
---|---|
date | Mon, 24 Apr 2017 14:38:34 -0700 |
parents | 092078913d54 |
children | 7f176909ab86 |
line wrap: on
line source
/* Copyright (C) 2009-2017 John W. Eaton This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave 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 General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #if ! defined (octave_display_h) #define octave_display_h 1 #include "octave-config.h" #include <string> class Matrix; class OCTINTERP_API display_info { protected: display_info (bool query = true) : ht (1), wd (1), dp (0), rx (72), ry (72), dpy_avail (false), err_msg () { init (query); } public: static int height (void) { return instance_ok () ? instance->do_height () : 0; } static int width (void) { return instance_ok () ? instance->do_width () : 0; } static int depth (void) { return instance_ok () ? instance->do_depth () : 0; } static double x_dpi (void) { return instance_ok () ? instance->do_x_dpi () : 0; } static double y_dpi (void) { return instance_ok () ? instance->do_y_dpi () : 0; } static bool display_available (void) { std::string msg; return instance_ok () ? instance->do_display_available (msg) : false; } static bool display_available (std::string& msg) { return instance_ok () ? instance->do_display_available (msg) : false; } // To disable querying the window system for defaults, this function // must be called before any other display_info function. static void no_window_system (void) { instance_ok (false); } private: static display_info *instance; static void cleanup_instance (void) { delete instance; instance = 0; } // Height, width, and depth of the display. int ht; int wd; int dp; // X- and Y- Resolution of the display in dots (pixels) per inch. double rx; double ry; bool dpy_avail; std::string err_msg; int do_height (void) const { return ht; } int do_width (void) const { return wd; } int do_depth (void) const { return dp; } double do_x_dpi (void) const { return rx; } double do_y_dpi (void) const { return ry; } bool do_display_available (std::string& msg) const { msg = err_msg; return dpy_avail; } void init (bool query = true); static bool instance_ok (bool query = true); }; #endif