Mercurial > octave
view libinterp/corefcn/display.h @ 20230:e914b5399c67
Use in-place operators in C++ code where possible.
* libgui/src/dialog.cc, libgui/src/m-editor/file-editor-tab.cc,
libgui/src/main-window.cc, libinterp/corefcn/bsxfun.cc,
libinterp/corefcn/filter.cc, libinterp/corefcn/mgorth.cc,
libinterp/corefcn/oct-stream.cc, libinterp/corefcn/pr-output.cc,
liboctave/array/Array-util.cc, liboctave/array/dim-vector.h,
liboctave/numeric/CollocWt.cc, liboctave/numeric/eigs-base.cc,
liboctave/numeric/lo-specfun.cc:
Use in-place operators in C++ code where possible.
author | Rik <rik@octave.org> |
---|---|
date | Mon, 25 May 2015 22:02:15 -0700 |
parents | 4197fc428c7d |
children | f7084eae3318 |
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/* Copyright (C) 2009-2015 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 <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