1 | /* $Id: QIDialog.cpp 79365 2019-06-26 15:57:32Z vboxsync $ */
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2 | /** @file
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3 | * VBox Qt GUI - Qt extensions: QIDialog class implementation.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2008-2019 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | */
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17 |
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18 | /* Qt includes: */
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19 | #include <QEventLoop>
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20 |
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21 | /* GUI includes: */
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22 | #include "QIDialog.h"
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23 | #include "UICommon.h"
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24 |
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25 |
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26 | QIDialog::QIDialog(QWidget *pParent /* = 0 */, Qt::WindowFlags enmFlags /* = 0 */)
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27 | : QDialog(pParent, enmFlags)
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28 | , m_fPolished(false)
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29 | {
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30 | /* Do not count that window as important for application,
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31 | * it will NOT be taken into account when other top-level windows will be closed: */
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32 | setAttribute(Qt::WA_QuitOnClose, false);
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33 | }
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34 |
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35 | void QIDialog::setVisible(bool fVisible)
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36 | {
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37 | /* Call to base-class: */
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38 | QDialog::setVisible(fVisible);
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39 |
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40 | /* Exit from the event-loop if there is any and
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41 | * we are changing our state from visible to hidden. */
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42 | if (m_pEventLoop && !fVisible)
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43 | m_pEventLoop->exit();
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44 | }
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45 |
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46 | int QIDialog::execute(bool fShow /* = true */, bool fApplicationModal /* = false */)
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47 | {
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48 | /* Check for the recursive run: */
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49 | AssertMsgReturn(!m_pEventLoop, ("QIDialog::execute() is called recursively!\n"), QDialog::Rejected);
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50 |
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51 | /* Reset the result-code: */
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52 | setResult(QDialog::Rejected);
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53 |
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54 | /* Should we delete ourself on close in theory? */
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55 | const bool fOldDeleteOnClose = testAttribute(Qt::WA_DeleteOnClose);
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56 | /* For the exec() time, set this attribute to 'false': */
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57 | setAttribute(Qt::WA_DeleteOnClose, false);
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58 |
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59 | /* Which is the current window-modality? */
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60 | const Qt::WindowModality oldModality = windowModality();
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61 | /* For the exec() time, set this attribute to 'window-modal' or 'application-modal': */
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62 | setWindowModality(!fApplicationModal ? Qt::WindowModal : Qt::ApplicationModal);
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63 |
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64 | /* Show ourself if requested: */
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65 | if (fShow)
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66 | show();
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67 |
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68 | /* Create a local event-loop: */
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69 | {
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70 | QEventLoop eventLoop;
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71 | m_pEventLoop = &eventLoop;
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72 |
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73 | /* Guard ourself for the case
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74 | * we destroyed ourself in our event-loop: */
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75 | QPointer<QIDialog> guard = this;
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76 |
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77 | /* Start the blocking event-loop: */
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78 | eventLoop.exec();
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79 |
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80 | /* Are we still valid? */
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81 | if (guard.isNull())
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82 | return QDialog::Rejected;
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83 |
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84 | m_pEventLoop = 0;
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85 | }
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86 |
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87 | /* Save the result-code early (we can delete ourself on close): */
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88 | const int iResultCode = result();
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89 |
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90 | /* Return old modality: */
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91 | setWindowModality(oldModality);
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92 |
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93 | /* Reset attribute to previous value: */
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94 | setAttribute(Qt::WA_DeleteOnClose, fOldDeleteOnClose);
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95 | /* Delete ourself if we should do that on close: */
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96 | if (fOldDeleteOnClose)
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97 | delete this;
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98 |
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99 | /* Return the result-code: */
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100 | return iResultCode;
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101 | }
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102 |
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103 | void QIDialog::showEvent(QShowEvent *pEvent)
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104 | {
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105 | /* Make sure we should polish dialog: */
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106 | if (m_fPolished)
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107 | return;
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108 |
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109 | /* Call to polish-event: */
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110 | polishEvent(pEvent);
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111 |
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112 | /* Mark dialog as polished: */
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113 | m_fPolished = true;
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114 | }
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115 |
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116 | void QIDialog::polishEvent(QShowEvent *)
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117 | {
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118 | /* Make sure layout is polished: */
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119 | adjustSize();
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120 | #ifdef VBOX_WS_MAC
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121 | /* And dialog have fixed size: */
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122 | setFixedSize(size());
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123 | #endif /* VBOX_WS_MAC */
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124 |
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125 | /* Explicit centering according to our parent: */
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126 | UICommon::centerWidget(this, parentWidget(), false);
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127 | }
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