1 | /* $Id: UIMachineView.h 103803 2024-03-12 11:15:18Z vboxsync $ */
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2 | /** @file
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3 | * VBox Qt GUI - UIMachineView 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_UIMachineView_h
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29 | #define FEQT_INCLUDED_SRC_runtime_UIMachineView_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 <QAbstractScrollArea>
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36 | #include <QEventLoop>
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37 |
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38 | /* GUI includes: */
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39 | #include "UIExtraDataDefs.h"
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40 | #include "UIFrameBuffer.h"
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41 | #include "UIMachineDefs.h"
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42 | #ifdef VBOX_WITH_DRAG_AND_DROP
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43 | # include "UIDnDHandler.h"
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44 | #endif /* VBOX_WITH_DRAG_AND_DROP */
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45 |
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46 | /* COM includes: */
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47 | #include "KMachineState.h"
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48 |
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49 | /* Other VBox includes: */
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50 | #include "VBox/com/ptr.h"
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51 | #ifdef VBOX_WS_MAC
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52 | # include <ApplicationServices/ApplicationServices.h>
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53 | #endif /* VBOX_WS_MAC */
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54 |
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55 | /* External includes: */
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56 | #ifdef VBOX_WS_MAC
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57 | # include <CoreFoundation/CFBase.h>
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58 | #endif /* VBOX_WS_MAC */
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59 |
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60 | /* Forward declarations: */
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61 | class UIActionPool;
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62 | class UIMachine;
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63 | class UIMachineLogic;
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64 | class UIMachineWindow;
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65 | class UINativeEventFilter;
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66 | class CGuest;
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67 | class CSession;
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68 | #ifdef VBOX_WITH_DRAG_AND_DROP
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69 | class CDnDTarget;
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70 | #endif
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71 |
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72 |
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73 | class UIMachineView : public QAbstractScrollArea
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74 | {
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75 | Q_OBJECT;
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76 |
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77 | signals:
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78 |
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79 | /** Notifies about mouse pointer shape change. */
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80 | void sigMousePointerShapeChange();
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81 | /** Notifies about frame-buffer resize. */
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82 | void sigFrameBufferResize();
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83 |
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84 | public:
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85 |
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86 | /* Factory function to create machine-view: */
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87 | static UIMachineView* create(UIMachineWindow *pMachineWindow, ulong uScreenId, UIVisualStateType visualStateType);
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88 | /* Factory function to destroy required machine-view: */
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89 | static void destroy(UIMachineView *pMachineView);
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90 |
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91 | /** Returns whether the guest-screen auto-resize is enabled. */
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92 | virtual bool isGuestAutoresizeEnabled() const { return true; }
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93 | /** Defines whether the guest-screen auto-resize is @a fEnabled. */
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94 | virtual void setGuestAutoresizeEnabled(bool fEnabled) { Q_UNUSED(fEnabled); }
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95 |
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96 | /** Send saved guest-screen size-hint to the guest.
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97 | * @note Reimplemented in sub-classes. Base implementation does nothing. */
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98 | virtual void resendSizeHint() {}
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99 |
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100 | /** Adjusts guest-screen size to correspond current visual-style.
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101 | * @note Reimplemented in sub-classes. Base implementation does nothing. */
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102 | virtual void adjustGuestScreenSize() {}
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103 |
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104 | /** Applies machine-view scale-factor. */
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105 | virtual void applyMachineViewScaleFactor();
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106 |
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107 | /** Returns screen ID for this view. */
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108 | ulong screenId() const { return m_uScreenId; }
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109 |
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110 | /** Returns the machine UI reference. */
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111 | UIMachine *uimachine() const;
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112 | /** Returns the machine-logic reference. */
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113 | UIMachineLogic *machineLogic() const;
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114 | /** Returns the machine-window reference. */
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115 | UIMachineWindow *machineWindow() const { return m_pMachineWindow; }
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116 | /** Returns view's frame-buffer reference. */
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117 | UIFrameBuffer *frameBuffer() const;
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118 |
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119 | /** Returns actual contents width. */
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120 | int contentsWidth() const;
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121 | /** Returns actual contents height. */
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122 | int contentsHeight() const;
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123 | /** Returns actual contents x origin. */
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124 | int contentsX() const;
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125 | /** Returns actual contents y origin. */
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126 | int contentsY() const;
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127 | /** Returns visible contents width. */
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128 | int visibleWidth() const;
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129 | /** Returns visible contents height. */
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130 | int visibleHeight() const;
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131 | /** Translates viewport point to contents point. */
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132 | QPoint viewportToContents(const QPoint &viewportPoint) const;
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133 | /** Scrolls contents by @a iDx x iDy pixels. */
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134 | void scrollBy(int iDx, int iDy);
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135 |
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136 | /** What view mode (normal, fullscreen etc.) are we in? */
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137 | UIVisualStateType visualStateType() const;
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138 |
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139 | /** Returns cached mouse cursor. */
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140 | QCursor cursor() const { return m_cursor; }
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141 |
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142 | /* Framebuffer aspect ratio: */
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143 | double aspectRatio() const;
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144 |
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145 | /** Atomically store the maximum guest resolution which we currently wish
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146 | * to handle for @a maximumGuestSize() to read. Should be called if anything
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147 | * happens (e.g. a screen hotplug) which might cause the value to change.
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148 | * @sa m_u64MaximumGuestSize. */
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149 | void setMaximumGuestSize(const QSize &minimumSizeHint = QSize());
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150 | /** Atomically read the maximum guest resolution which we currently wish to
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151 | * handle. This may safely be called from another thread (called by
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152 | * UIFramebuffer on EMT).
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153 | * @sa m_u64MaximumGuestSize. */
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154 | QSize maximumGuestSize();
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155 |
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156 | /** Updates console's display viewport.
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157 | * @remarks Used to update 3D-service overlay viewport as well. */
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158 | void updateViewport();
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159 |
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160 | #ifdef VBOX_WITH_DRAG_AND_DROP
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161 | /** Checks for a pending drag and drop event within the guest and
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162 | * (optionally) starts a drag and drop operation on the host. */
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163 | int dragCheckPending();
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164 | /** Starts a drag and drop operation from guest to the host.
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165 | * This internally either uses Qt's abstract QDrag methods
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166 | * or some other OS-dependent implementation. */
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167 | int dragStart();
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168 | /** Aborts (and resets) the current (pending)
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169 | * guest to host drag and drop operation. */
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170 | int dragStop();
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171 | #endif /* VBOX_WITH_DRAG_AND_DROP */
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172 |
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173 | /** Performs pre-processing of all the native events. */
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174 | virtual bool nativeEventPreprocessor(const QByteArray &eventType, void *pMessage);
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175 |
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176 | #ifdef VBOX_WS_MAC
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177 | /** Returns VM contents image. */
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178 | CGImageRef vmContentImage();
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179 | #endif
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180 |
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181 | public slots:
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182 |
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183 | /** Handles NotifyChange event received from frame-buffer.
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184 | * @todo To make it right, this have to be protected, but
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185 | * connection should be moved from frame-buffer to this class. */
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186 | virtual void sltHandleNotifyChange(int iWidth, int iHeight);
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187 |
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188 | /** Handles NotifyUpdate event received from frame-buffer.
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189 | * @todo To make it right, this have to be protected, but
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190 | * connection should be moved from frame-buffer to this class. */
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191 | virtual void sltHandleNotifyUpdate(int iX, int iY, int iWidth, int iHeight);
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192 |
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193 | /** Handles SetVisibleRegion event received from frame-buffer.
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194 | * @todo To make it right, this have to be protected, but
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195 | * connection should be moved from frame-buffer to this class. */
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196 | virtual void sltHandleSetVisibleRegion(QRegion region);
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197 |
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198 | protected slots:
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199 |
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200 | /* Performs guest-screen resize to a size specified.
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201 | * @param toSize Brings the size guest-screen needs to be resized to.
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202 | * @note If toSize isn't valid or sane one, it will be replaced with actual
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203 | * size of centralWidget() containing this machine-view currently.
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204 | * @note Also, take into acount that since this method is also called to
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205 | * resize to centralWidget() size, the size passed is expected to be
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206 | * tranformed to internal coordinate system and thus to be restored to
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207 | * guest coordinate system (absolute one) before passing to guest. */
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208 | void sltPerformGuestResize(const QSize &toSize = QSize());
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209 |
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210 | /** Handles guest-screen toggle request.
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211 | * @param iScreen Brings the number of screen being referred.
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212 | * @param fEnabled Brings whether this screen should be enabled. */
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213 | void sltHandleActionTriggerViewScreenToggle(int iScreen, bool fEnabled);
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214 | /** Handles guest-screen resize request.
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215 | * @param iScreen Brings the number of screen being referred.
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216 | * @param size Brings the size of screen to be applied. */
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217 | void sltHandleActionTriggerViewScreenResize(int iScreen, const QSize &size);
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218 |
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219 | /* Watch dog for desktop resizes: */
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220 | void sltDesktopResized();
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221 |
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222 | /** Handles the scale-factor change. */
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223 | void sltHandleScaleFactorChange(const QUuid &uMachineID);
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224 |
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225 | /** Handles the scaling-optimization change. */
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226 | void sltHandleScalingOptimizationChange(const QUuid &uMachineID);
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227 |
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228 | /* Console callback handlers: */
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229 | virtual void sltMachineStateChanged();
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230 | /** Handles guest request to change the mouse pointer shape. */
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231 | void sltMousePointerShapeChange();
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232 |
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233 | /** Detaches COM. */
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234 | void sltDetachCOM();
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235 |
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236 | protected:
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237 |
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238 | /* Machine-view constructor: */
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239 | UIMachineView(UIMachineWindow *pMachineWindow, ulong uScreenId);
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240 | /* Machine-view destructor: */
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241 | virtual ~UIMachineView() {}
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242 |
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243 | /* Prepare routines: */
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244 | virtual void loadMachineViewSettings();
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245 | //virtual void prepareNativeFilters() {}
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246 | virtual void prepareViewport();
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247 | virtual void prepareFrameBuffer();
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248 | virtual void prepareCommon();
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249 | #ifdef VBOX_WITH_DRAG_AND_DROP
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250 | virtual int prepareDnd();
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251 | #endif
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252 | virtual void prepareFilters();
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253 | virtual void prepareConnections();
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254 | virtual void prepareConsoleConnections();
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255 |
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256 | /* Cleanup routines: */
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257 | //virtual void cleanupConsoleConnections() {}
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258 | //virtual void cleanupConnections() {}
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259 | //virtual void cleanupFilters() {}
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260 | #ifdef VBOX_WITH_DRAG_AND_DROP
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261 | virtual void cleanupDnd();
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262 | #endif
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263 | //virtual void cleanupCommon() {}
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264 | virtual void cleanupFrameBuffer();
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265 | //virtual void cleanupViewport();
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266 | virtual void cleanupNativeFilters();
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267 | //virtual void saveMachineViewSettings() {}
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268 |
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269 | /* Protected getters: */
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270 | UIActionPool* actionPool() const;
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271 | QSize sizeHint() const;
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272 |
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273 | /** Retrieves the last guest-screen size-hint from extra-data. */
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274 | QSize storedGuestScreenSizeHint() const;
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275 | /** Stores a guest-screen @a sizeHint to extra-data. */
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276 | void setStoredGuestScreenSizeHint(const QSize &sizeHint);
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277 |
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278 | /** Retrieves the sent guest-screen size-hint from display or frame-buffer. */
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279 | QSize requestedGuestScreenSizeHint() const;
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280 |
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281 | /** Retrieves the last guest-screen visibility status from extra-data. */
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282 | bool guestScreenVisibilityStatus() const;
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283 |
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284 | /** Handles machine-view scale changes. */
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285 | void handleScaleChange();
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286 |
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287 | /** Returns the pause-pixmap: */
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288 | const QPixmap& pausePixmap() const { return m_pausePixmap; }
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289 | /** Returns the scaled pause-pixmap: */
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290 | const QPixmap& pausePixmapScaled() const { return m_pausePixmapScaled; }
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291 | /** Resets the pause-pixmap. */
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292 | void resetPausePixmap();
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293 | /** Acquires live pause-pixmap. */
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294 | void takePausePixmapLive();
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295 | /** Acquires snapshot pause-pixmap. */
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296 | void takePausePixmapSnapshot();
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297 | /** Updates the scaled pause-pixmap. */
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298 | void updateScaledPausePixmap();
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299 |
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300 | /** The available area on the current screen for application windows. */
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301 | virtual QRect workingArea() const = 0;
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302 | /** Calculate how big the guest desktop can be while still fitting on one
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303 | * host screen. */
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304 | virtual QSize calculateMaxGuestSize() const = 0;
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305 | virtual void updateSliders();
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306 | static void dimImage(QImage &img);
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307 | void scrollContentsBy(int dx, int dy);
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308 | #ifdef VBOX_WS_MAC
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309 | void updateDockIcon();
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310 | CGImageRef frameBuffertoCGImageRef(UIFrameBuffer *pFrameBuffer);
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311 | #endif /* VBOX_WS_MAC */
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312 | /** Is this a fullscreen-type view? */
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313 | bool isFullscreenOrSeamless() const;
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314 |
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315 | /* Cross-platforms event processors: */
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316 | bool eventFilter(QObject *pWatched, QEvent *pEvent);
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317 | void resizeEvent(QResizeEvent *pEvent);
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318 | void moveEvent(QMoveEvent *pEvent);
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319 | void paintEvent(QPaintEvent *pEvent);
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320 |
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321 | /** Handles focus-in @a pEvent. */
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322 | void focusInEvent(QFocusEvent *pEvent);
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323 | /** Handles focus-out @a pEvent. */
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324 | void focusOutEvent(QFocusEvent *pEvent);
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325 | #ifdef VBOX_WS_NIX
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326 | virtual void keyPressEvent(QKeyEvent *pEvent) override;
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327 | virtual void keyReleaseEvent(QKeyEvent *pEvent) override;
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328 | #endif
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329 |
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330 | #ifdef VBOX_WITH_DRAG_AND_DROP
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331 | /**
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332 | * Returns @true if the VM window can accept (start is, start) a drag and drop
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333 | * operation, @false if not.
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334 | */
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335 | bool dragAndDropCanAccept() const;
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336 |
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337 | /**
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338 | * Returns @true if drag and drop for this machine is active
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339 | * (that is, host->guest, guest->host or bidirectional), @false if not.
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340 | */
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341 | bool dragAndDropIsActive() const;
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342 |
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343 | /**
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344 | * Host -> Guest: Issued when the host cursor enters the guest (VM) window.
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345 | * The guest will receive the relative cursor coordinates of the
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346 | * appropriate screen ID.
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347 | *
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348 | * @param pEvent Related enter event.
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349 | */
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350 | void dragEnterEvent(QDragEnterEvent *pEvent);
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351 |
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352 | /**
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353 | * Host -> Guest: Issued when the host cursor moves inside (over) the guest (VM) window.
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354 | * The guest will receive the relative cursor coordinates of the
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355 | * appropriate screen ID.
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356 | *
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357 | * @param pEvent Related move event.
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358 | */
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359 | void dragLeaveEvent(QDragLeaveEvent *pEvent);
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360 |
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361 | /**
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362 | * Host -> Guest: Issued when the host cursor leaves the guest (VM) window again.
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363 | * This will ask the guest to stop any further drag'n drop operation.
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364 | *
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365 | * @param pEvent Related leave event.
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366 | */
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367 | void dragMoveEvent(QDragMoveEvent *pEvent);
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368 |
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369 | /**
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370 | * Host -> Guest: Issued when the host drops data into the guest (VM) window.
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371 | *
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372 | * @param pEvent Related drop event.
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373 | */
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374 | void dropEvent(QDropEvent *pEvent);
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375 | #endif /* VBOX_WITH_DRAG_AND_DROP */
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376 |
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377 | /** Scales passed size forward. */
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378 | QSize scaledForward(QSize size) const;
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379 | /** Scales passed size backward. */
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380 | QSize scaledBackward(QSize size) const;
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381 |
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382 | /** Updates mouse pointer @a pixmap, @a uXHot and @a uYHot according to scaling attributes. */
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383 | void updateMousePointerPixmapScaling(QPixmap &pixmap, uint &uXHot, uint &uYHot);
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384 |
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385 | /* Protected members: */
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386 | UIMachineWindow *m_pMachineWindow;
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387 | ulong m_uScreenId;
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388 | KMachineState m_previousState;
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389 | /** HACK: when switching out of fullscreen or seamless we wish to override
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390 | * the default size hint to avoid short resizes back to fullscreen size.
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391 | * Not explicitly initialised (i.e. invalid by default). */
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392 | QSize m_sizeHintOverride;
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393 |
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394 | /** Last size hint sent as a part of guest auto-resize feature.
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395 | * @note Useful to avoid spamming CDisplay with same hint before
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396 | * frame-buffer finally resized to requested size. */
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397 | QSize m_lastSizeHint;
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398 |
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399 | /** Holds current host-screen number. */
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400 | int m_iHostScreenNumber;
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401 |
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402 | /** Holds the maximum guest screen size policy. */
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403 | MaximumGuestScreenSizePolicy m_enmMaximumGuestScreenSizePolicy;
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404 | /** The maximum guest size for fixed size policy. */
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405 | QSize m_fixedMaxGuestSize;
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406 | /** Maximum guest resolution which we wish to handle. Must be accessed
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407 | * atomically.
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408 | * @note The background for this variable is that we need this value to be
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409 | * available to the EMT thread, but it can only be calculated by the
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410 | * GUI, and GUI code can only safely be called on the GUI thread due to
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411 | * (at least) X11 threading issues. So we calculate the value in advance,
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412 | * monitor things in case it changes and update it atomically when it does.
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413 | */
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414 | /** @todo This should be private. */
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415 | volatile uint64_t m_u64MaximumGuestSize;
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416 |
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417 | /** Holds the pause-pixmap. */
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418 | QPixmap m_pausePixmap;
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419 | /** Holds the scaled pause-pixmap. */
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420 | QPixmap m_pausePixmapScaled;
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421 |
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422 | /** Holds cached mouse cursor. */
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423 | QCursor m_cursor;
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424 |
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425 | #ifdef VBOX_WITH_DRAG_AND_DROP
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426 | /** Pointer to drag and drop handler instance. */
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427 | UIDnDHandler *m_pDnDHandler;
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428 | # ifdef VBOX_WITH_DRAG_AND_DROP_GH
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429 | /** Flag indicating whether a guest->host drag currently is in
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430 | * progress or not. */
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431 | bool m_fIsDraggingFromGuest;
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432 | # endif
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433 | #endif
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434 |
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435 | /** Holds the native event filter instance. */
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436 | UINativeEventFilter *m_pNativeEventFilter;
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437 | };
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438 |
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439 | /* This maintenance class is a part of future roll-back mechanism.
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440 | * It allows to block main GUI thread until specific event received.
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441 | * Later it will become more abstract but now its just used to help
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442 | * fullscreen & seamless modes to restore normal guest size hint. */
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443 | /** @todo This class is now unused - can it be removed altogether? */
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444 | class UIMachineViewBlocker : public QEventLoop
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445 | {
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446 | Q_OBJECT;
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447 |
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448 | public:
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449 |
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450 | UIMachineViewBlocker()
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451 | : QEventLoop(0)
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452 | , m_iTimerId(0)
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453 | {
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454 | /* Also start timer to unlock pool in case of
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455 | * required condition doesn't happens by some reason: */
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456 | m_iTimerId = startTimer(3000);
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457 | }
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458 |
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459 | virtual ~UIMachineViewBlocker()
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460 | {
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461 | /* Kill the timer: */
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462 | killTimer(m_iTimerId);
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463 | }
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464 |
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465 | protected:
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466 |
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467 | void timerEvent(QTimerEvent *pEvent)
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468 | {
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469 | /* If that timer event occurs => it seems
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470 | * guest resize event doesn't comes in time,
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471 | * shame on it, but we just unlocking 'this': */
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472 | QEventLoop::timerEvent(pEvent);
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473 | exit();
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474 | }
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475 |
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476 | int m_iTimerId;
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477 | };
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478 |
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479 | #endif /* !FEQT_INCLUDED_SRC_runtime_UIMachineView_h */
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