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annotate libgui/src/gui-utils.cc @ 31616:726d2628752c

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eliminate unused default_settings variable from resource manager * resource-manager.h, resource-manager.cc (resource_manager::m_default_settings): Delete member variable, accessor function, and all uses.
author John W. Eaton <jwe@octave.org>
date Fri, 02 Dec 2022 10:10:19 -0500
parents e2c8c852399e
children c6d54dd31a7e
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2000-2022 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if defined (HAVE_CONFIG_H)
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27 # include "config.h"
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28 #endif
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29
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30 #include <QApplication>
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31 #include <QRect>
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32 #include <QScreen>
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33
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34 #include "gui-utils.h"
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35
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36 namespace octave
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37 {
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38 OCTGUI_API QColor
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39 interpolate_color (const QColor& col1, const QColor& col2,
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40 double fs, double fv)
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41 {
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42 qreal h1, s1, v1, h2, s2, v2;
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43
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44 col1.getHsvF (&h1, &s1, &v1);
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45 col2.getHsvF (&h2, &s2, &v2);
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46
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47 return QColor::fromHsvF (h1, s1*fs, v1 + fv*(v2 - v1));
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48 }
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49
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50 OCTGUI_API void
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51 get_screen_geometry (int& width, int& height)
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52 {
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53 QRect geom = QGuiApplication::primaryScreen ()->availableGeometry ();
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54
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55 width = geom.width ();
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56 height = geom.height ();
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57 }
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58
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59
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60 OCTGUI_API void
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61 adjust_to_screen (QRect& actual_geometry, const QRect& default_geometry)
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62 {
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63
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64 // Get the screen that holds the largest part of the given actual geometry
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65
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66 const QScreen *actual_screen = nullptr; // no screen found yet
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67 QRect actual_screen_geom = QRect (); // geometry of found screen
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68 int intersected_area_max = 0; // max. intersected area
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69
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70 const int area_actual_geometry
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71 = actual_geometry.width () * actual_geometry.height ();
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72 QRect intersection;
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73
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74 foreach (const QScreen *screen, QGuiApplication::screens())
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75 {
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76 QRect screen_geom = screen->availableGeometry ();
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77 intersection = screen_geom.intersected (actual_geometry);
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78 if (! intersection.isEmpty ())
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79 {
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80 int area = intersection.width () * intersection.height ();
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81 if (area > intersected_area_max)
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82 {
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83 actual_screen = screen;
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84 actual_screen_geom = screen->availableGeometry ();
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85 if (area == area_actual_geometry)
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86 return; // Actual geom is completely on a screen: return
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87 intersected_area_max = area;
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88 }
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89 }
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90 }
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91
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92 // If the actual geometry is on no screen, use deault geometry
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93
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94 if (actual_screen == nullptr)
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95 {
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96 actual_geometry = default_geometry;
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97 return;
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98 }
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99
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100 // There is a screen that holds a part of the actual geometry.
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101 // Now adjust actual geometry to this screen
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102
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103 // Get some properties of the actual and intersected geometry
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104 int agx1, agy1, agx2, agy2;
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105 actual_geometry.getCoords (&agx1, &agy1, &agx2, &agy2);
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106 int isx1, isy1, isx2, isy2;
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107 intersection.getCoords (&isx1, &isy1, &isx2, &isy2);
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108
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109 // Make the intersection the same size as the actual geometry
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110 if ((agx1 == isx1) && (agx2 != isx2))
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111 isx1 = isx1 - agx2 + isx2;
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112 if ((agx1 != isx1) && (agx2 == isx2))
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113 isx2 = isx2 + agx2 - isx2;
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114 if ((agy1 == isy1) && (agy2 != isy2))
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115 isy1 = isy1 - agy2 + isy2;
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116 if ((agy1 != isy1) && (agy2 == isy2))
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117 isy2 = isy2 + agy2 - isy2;
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118
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119 // And compute again the intersection with the screen if this resizing
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120 // led to corners outside the screen
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121 actual_geometry = actual_screen_geom.intersected (
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122 QRect (QPoint (isx1,isy1), QPoint (isx2,isy2)));
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123 }
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124
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125 }