1 | /* $Id: UIMultiScreenLayout.h 98669 2023-02-21 11:15:34Z vboxsync $ */
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2 | /** @file
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3 | * VBox Qt GUI - UIMultiScreenLayout class declaration.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2010-2023 Oracle and/or its affiliates.
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8 | *
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9 | * This file is part of VirtualBox base platform packages, as
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10 | * available from https://www.virtualbox.org.
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11 | *
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12 | * This program is free software; you can redistribute it and/or
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13 | * modify it under the terms of the GNU General Public License
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14 | * as published by the Free Software Foundation, in version 3 of the
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15 | * License.
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16 | *
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17 | * This program is distributed in the hope that it will be useful, but
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18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 | * General Public License for more details.
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21 | *
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22 | * You should have received a copy of the GNU General Public License
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23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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24 | *
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25 | * SPDX-License-Identifier: GPL-3.0-only
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26 | */
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27 |
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28 | #ifndef FEQT_INCLUDED_SRC_runtime_UIMultiScreenLayout_h
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29 | #define FEQT_INCLUDED_SRC_runtime_UIMultiScreenLayout_h
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30 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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31 | # pragma once
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32 | #endif
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33 |
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34 | /* Qt includes: */
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35 | #include <QMap>
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36 | #include <QObject>
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37 |
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38 | /* Forward declarations: */
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39 | class UIActionPool;
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40 | class UIMachine;
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41 | class UIMachineLogic;
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42 |
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43 | /** QObject subclass containing a part of
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44 | * machine-logic related to multi-screen layout handling.
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45 | * Used in such modes as Full-screen and Seamless. */
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46 | class UIMultiScreenLayout : public QObject
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47 | {
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48 | Q_OBJECT;
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49 |
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50 | signals:
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51 |
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52 | /** Notifies about layout change. */
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53 | void sigScreenLayoutChange();
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54 |
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55 | public:
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56 |
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57 | /** Constructs multi-screen layout passing @a pMachineLogic to the base-class.
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58 | * @param pMachineLogic Brings the parent machine-logic reference. */
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59 | UIMultiScreenLayout(UIMachineLogic *pMachineLogic);
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60 |
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61 | /** Returns whether there is host-monitor suitable for guest-screen with @a iScreenId specified. */
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62 | bool hasHostScreenForGuestScreen(int iScreenId) const;
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63 | /** Returns a host-monitor suitable for guest-screen with @a iScreenId specified. */
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64 | int hostScreenForGuestScreen(int iScreenId) const;
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65 |
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66 | /** Returns video memory requirements for currently cached multi-screen layout. */
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67 | quint64 memoryRequirements() const;
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68 |
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69 | /** Updates multi-screen layout on the basis
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70 | * of known host/guest screen count. */
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71 | void update();
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72 | /** Updates everything.
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73 | * Recalculates host/guest screen count
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74 | * and calls for update wrapper above. */
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75 | void rebuild();
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76 |
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77 | private slots:
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78 |
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79 | /** Handles screen layout change request.
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80 | * @param iRequestedGuestScreen Brings the index of guest-screen which needs to be mapped to certain host-monitor.
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81 | * @param iRequestedHostMonitor Brings the index of host-monitor which needs to be mapped to certain guest-screen.*/
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82 | void sltHandleScreenLayoutChange(int iRequestedGuestScreen, int iRequestedHostMonitor);
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83 |
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84 | private:
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85 |
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86 | /** Prepares everything. */
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87 | void prepare();
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88 | /** Prepares connections. */
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89 | void prepareConnections();
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90 |
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91 | /** Returns parent machine-logic reference. */
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92 | UIMachineLogic *machineLogic() const { return m_pMachineLogic; }
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93 | /** Returns machine UI reference. */
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94 | UIMachine *uimachine() const;
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95 | /** Returns action-pool reference. */
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96 | UIActionPool *actionPool() const;
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97 |
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98 | /** Recalculates host-monitor count. */
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99 | void calculateHostMonitorCount();
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100 | /** Recalculates guest-screen count. */
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101 | void calculateGuestScreenCount();
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102 |
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103 | /** Calculates memory requirements for passed @a screenLayout. */
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104 | quint64 memoryRequirements(const QMap<int, int> &screenLayout) const;
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105 |
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106 | /** Holds the machine-logic reference. */
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107 | UIMachineLogic *m_pMachineLogic;
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108 |
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109 | /** Holds the number of guest-screens. */
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110 | ulong m_cGuestScreens;
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111 | /** Holds the number of host-monitors. */
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112 | int m_cHostMonitors;
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113 |
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114 | /** Holds currently cached enabled guest-screens. */
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115 | QList<int> m_guestScreens;
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116 | /** Holds currently cached disabled guest-screens. */
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117 | QList<int> m_disabledGuestScreens;
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118 |
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119 | /** Holds the cached screens map.
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120 | * The keys used for guest-screens.
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121 | * The values used for host-monitors. */
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122 | QMap<int, int> m_screenMap;
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123 | };
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124 |
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125 | #endif /* !FEQT_INCLUDED_SRC_runtime_UIMultiScreenLayout_h */
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126 |
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