Mercurial > octave
view libinterp/corefcn/display.h @ 23433:c9fab0bc983e
maint: Use convention 'int& x' for naming references.
* ButtonGroup.cc, Canvas.cc, Canvas.h, annotation-dialog.cc,
annotation-dialog.h, dialog.h, documentation-dock-widget.cc,
files-dock-widget.cc, files-dock-widget.h, find-files-dialog.cc,
find-files-dialog.h, find-files-model.cc, find-files-model.h,
history-dock-widget.cc, history-dock-widget.h, file-editor-tab.cc,
file-editor-tab.h, file-editor.cc, file-editor.h, main-window.cc,
main-window.h, octave-qt-link.h, parser.cc, parser.h, webinfo.cc, webinfo.h,
settings-dialog.cc, bsxfun.cc, call-stack.cc, call-stack.h, fft.cc, fft2.cc,
fftn.cc, gl-render.cc, graphics.cc, graphics.in.h, input.cc, load-save.cc,
ls-hdf5.cc, ls-hdf5.h, octave-link.h, pr-output.cc, regexp.cc, sparse-xdiv.cc,
sparse-xdiv.h, symtab.cc, xdiv.cc, xdiv.h, zfstream.h, __eigs__.cc,
__ode15__.cc, ov-base.h, ov-builtin.cc, ov-cx-sparse.h, ov-fcn-handle.cc,
ov-fcn-handle.h, ov.cc, ov.h, jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h,
pt-jit.cc, pt-jit.h, CMatrix.cc, CMatrix.h, CSparse.cc, CSparse.h,
MatrixType.cc, MatrixType.h, dDiagMatrix.cc, dMatrix.cc, dMatrix.h, dSparse.cc,
dSparse.h, fCMatrix.cc, fCMatrix.h, fDiagMatrix.cc, fMatrix.cc, fMatrix.h,
eigs-base.cc, oct-fftw.cc, oct-rand.h, sparse-dmsolve.cc, kpse.cc, lo-regexp.h:
Use convention 'int& x' for naming references.
author | Rik <rik@octave.org> |
---|---|
date | Mon, 24 Apr 2017 17:20:37 -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