1 | /* $Id: QIDialog.cpp 28800 2010-04-27 08:22:32Z vboxsync $ */
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2 | /** @file
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3 | *
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4 | * VBox frontends: Qt GUI ("VirtualBox"):
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5 | * VirtualBox Qt extensions: QIDialog class implementation
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6 | */
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7 |
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8 | /*
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9 | * Copyright (C) 2008-2009 Oracle Corporation
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10 | *
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11 | * This file is part of VirtualBox Open Source Edition (OSE), as
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12 | * available from http://www.virtualbox.org. This file is free software;
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13 | * you can redistribute it and/or modify it under the terms of the GNU
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14 | * General Public License (GPL) as published by the Free Software
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15 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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16 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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17 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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18 | */
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19 |
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20 | /* VBox includes */
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21 | #include "QIDialog.h"
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22 | #include "VBoxGlobal.h"
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23 | #ifdef Q_WS_MAC
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24 | # include "VBoxUtils.h"
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25 | #endif /* Q_WS_MAC */
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26 |
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27 | /* Qt includes */
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28 | #include <QPointer>
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29 |
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30 | QIDialog::QIDialog (QWidget *aParent /* = 0 */, Qt::WindowFlags aFlags /* = 0 */)
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31 | : QDialog (aParent, aFlags)
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32 | , mPolished (false)
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33 | , mEventLoop (0)
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34 | {
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35 | }
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36 |
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37 | void QIDialog::showEvent (QShowEvent * /* aEvent */)
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38 | {
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39 | /* Two thinks to do for fixed size dialogs on MacOS X:
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40 | * 1. Make sure the layout is polished and have the right size
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41 | * 2. Disable that _unnecessary_ size grip (Bug in Qt?) */
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42 | QSizePolicy policy = sizePolicy();
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43 | if ((policy.horizontalPolicy() == QSizePolicy::Fixed &&
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44 | policy.verticalPolicy() == QSizePolicy::Fixed) ||
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45 | (windowFlags() & Qt::Sheet) == Qt::Sheet)
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46 | {
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47 | adjustSize();
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48 | setFixedSize (size());
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49 | #ifdef Q_WS_MAC
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50 | ::darwinSetShowsResizeIndicator (this, false);
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51 | #endif /* Q_WS_MAC */
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52 | }
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53 |
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54 | /* Polishing border */
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55 | if (mPolished)
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56 | return;
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57 | mPolished = true;
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58 |
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59 | /* Explicit widget centering relatively to it's parent
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60 | * if any or desktop if parent is missed. */
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61 | VBoxGlobal::centerWidget (this, parentWidget(), false);
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62 | }
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63 |
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64 | int QIDialog::exec (bool aShow /* = true */)
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65 | {
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66 | /* Reset the result code */
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67 | setResult (QDialog::Rejected);
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68 |
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69 | bool wasDeleteOnClose = testAttribute (Qt::WA_DeleteOnClose);
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70 | setAttribute (Qt::WA_DeleteOnClose, false);
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71 | #if defined(Q_WS_MAC) && QT_VERSION >= 0x040500
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72 | /* After 4.5 Qt changed the behavior of Sheets for the window/application
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73 | * modal case. See "New Ways of Using Dialogs" in
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74 | * http://doc.trolltech.com/qq/QtQuarterly30.pdf why. We want the old
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75 | * behavior back, where all modal windows where shown as sheets. So make
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76 | * the modal mode window, but be application modal in any case. */
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77 | Qt::WindowModality winModality = windowModality();
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78 | bool wasSetWinModality = testAttribute (Qt::WA_SetWindowModality);
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79 | if ((windowFlags() & Qt::Sheet) == Qt::Sheet)
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80 | {
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81 | setWindowModality (Qt::WindowModal);
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82 | setAttribute (Qt::WA_SetWindowModality, false);
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83 | }
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84 | #endif /* defined(Q_WS_MAC) && QT_VERSION >= 0x040500 */
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85 | /* The dialog has to modal in any case. Save the current modality to
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86 | * restore it later. */
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87 | bool wasShowModal = testAttribute (Qt::WA_ShowModal);
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88 | setAttribute (Qt::WA_ShowModal, true);
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89 |
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90 | /* Create a local event loop */
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91 | mEventLoop = new QEventLoop();
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92 | /* Show the window if requested */
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93 | if (aShow)
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94 | show();
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95 | /* A guard to ourself for the case we destroy ourself. */
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96 | QPointer<QIDialog> guard = this;
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97 | /* Start the event loop. This blocks. */
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98 | mEventLoop->exec();
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99 | /* Delete the event loop */
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100 | delete mEventLoop;
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101 | mEventLoop = 0;
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102 | /* Are we valid anymore? */
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103 | if (guard.isNull())
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104 | return QDialog::Rejected;
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105 | /* Save the result code in case we delete ourself */
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106 | QDialog::DialogCode res = (QDialog::DialogCode)result();
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107 | #if defined(Q_WS_MAC) && QT_VERSION >= 0x040500
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108 | /* Restore old modality mode */
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109 | if ((windowFlags() & Qt::Sheet) == Qt::Sheet)
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110 | {
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111 | setWindowModality (winModality);
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112 | setAttribute (Qt::WA_SetWindowModality, wasSetWinModality);
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113 | }
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114 | #endif /* defined(Q_WS_MAC) && QT_VERSION >= 0x040500 */
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115 | /* Set the old show modal attribute */
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116 | setAttribute (Qt::WA_ShowModal, wasShowModal);
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117 | /* Delete us in the case we should do so on close */
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118 | if (wasDeleteOnClose)
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119 | delete this;
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120 | /* Return the final result */
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121 | return res;
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122 | }
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123 |
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124 | void QIDialog::setVisible (bool aVisible)
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125 | {
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126 | QDialog::setVisible (aVisible);
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127 | /* Exit from the event loop if there is any and we are changing our state
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128 | * from visible to invisible. */
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129 | if (mEventLoop && !aVisible)
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130 | mEventLoop->exit();
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131 | }
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132 |
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