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Please review the following ** information to ensure the GNU General Public License requirements will ** be met: https://www.gnu.org/licenses/gpl-2.0.html and ** https://www.gnu.org/licenses/gpl-3.0.html. ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include #include #include "private/qlabel_p.h" #include "private/qapplication_p.h" #include #include #include #include #include #include #include #include #include #include #include #include #if QT_CONFIG(textedit) #include #endif #if QT_CONFIG(menu) #include #endif #include "qdialog_p.h" #include #include #include #ifdef Q_OS_WIN # include #include #endif QT_BEGIN_NAMESPACE #if defined(Q_OS_WIN) && !defined(Q_OS_WINRT) HMENU qt_getWindowsSystemMenu(const QWidget *w) { if (QWindow *window = QApplicationPrivate::windowForWidget(w)) if (void *handle = QGuiApplication::platformNativeInterface()->nativeResourceForWindow("handle", window)) return GetSystemMenu(reinterpret_cast(handle), false); return 0; } #endif enum Button { Old_Ok = 1, Old_Cancel = 2, Old_Yes = 3, Old_No = 4, Old_Abort = 5, Old_Retry = 6, Old_Ignore = 7, Old_YesAll = 8, Old_NoAll = 9, Old_ButtonMask = 0xFF, NewButtonMask = 0xFFFFFC00 }; enum DetailButtonLabel { ShowLabel = 0, HideLabel = 1 }; #if QT_CONFIG(textedit) class QMessageBoxDetailsText : public QWidget { Q_OBJECT public: class TextEdit : public QTextEdit { public: TextEdit(QWidget *parent=0) : QTextEdit(parent) { } #ifndef QT_NO_CONTEXTMENU void contextMenuEvent(QContextMenuEvent * e) Q_DECL_OVERRIDE { QMenu *menu = createStandardContextMenu(); menu->setAttribute(Qt::WA_DeleteOnClose); menu->popup(e->globalPos()); } #endif // QT_NO_CONTEXTMENU }; QMessageBoxDetailsText(QWidget *parent=0) : QWidget(parent) , copyAvailable(false) { QVBoxLayout *layout = new QVBoxLayout; layout->setMargin(0); QFrame *line = new QFrame(this); line->setFrameShape(QFrame::HLine); line->setFrameShadow(QFrame::Sunken); layout->addWidget(line); textEdit = new TextEdit(); textEdit->setFixedHeight(100); textEdit->setFocusPolicy(Qt::NoFocus); textEdit->setReadOnly(true); layout->addWidget(textEdit); setLayout(layout); connect(textEdit, SIGNAL(copyAvailable(bool)), this, SLOT(textCopyAvailable(bool))); } void setText(const QString &text) { textEdit->setPlainText(text); } QString text() const { return textEdit->toPlainText(); } bool copy() { #ifdef QT_NO_CLIPBOARD return false; #else if (!copyAvailable) return false; textEdit->copy(); return true; #endif } void selectAll() { textEdit->selectAll(); } private slots: void textCopyAvailable(bool available) { copyAvailable = available; } private: bool copyAvailable; TextEdit *textEdit; }; #endif // QT_CONFIG(textedit) class DetailButton : public QPushButton { public: DetailButton(QWidget *parent) : QPushButton(label(ShowLabel), parent) { setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed); } QString label(DetailButtonLabel label) const { return label == ShowLabel ? QMessageBox::tr("Show Details...") : QMessageBox::tr("Hide Details..."); } void setLabel(DetailButtonLabel lbl) { setText(label(lbl)); } QSize sizeHint() const Q_DECL_OVERRIDE { ensurePolished(); QStyleOptionButton opt; initStyleOption(&opt); const QFontMetrics fm = fontMetrics(); opt.text = label(ShowLabel); QSize sz = fm.size(Qt::TextShowMnemonic, opt.text); QSize ret = style()->sizeFromContents(QStyle::CT_PushButton, &opt, sz, this). expandedTo(QApplication::globalStrut()); opt.text = label(HideLabel); sz = fm.size(Qt::TextShowMnemonic, opt.text); ret = ret.expandedTo(style()->sizeFromContents(QStyle::CT_PushButton, &opt, sz, this). expandedTo(QApplication::globalStrut())); return ret; } }; class QMessageBoxPrivate : public QDialogPrivate { Q_DECLARE_PUBLIC(QMessageBox) public: QMessageBoxPrivate() : escapeButton(0), defaultButton(0), checkbox(0), clickedButton(0), detailsButton(0), #if QT_CONFIG(textedit) detailsText(0), #endif compatMode(false), autoAddOkButton(true), detectedEscapeButton(0), informativeLabel(0), options(QMessageDialogOptions::create()) { } void init(const QString &title = QString(), const QString &text = QString()); void setupLayout(); void _q_buttonClicked(QAbstractButton *); void _q_clicked(QPlatformDialogHelper::StandardButton button, QPlatformDialogHelper::ButtonRole role); QAbstractButton *findButton(int button0, int button1, int button2, int flags); void addOldButtons(int button0, int button1, int button2); QAbstractButton *abstractButtonForId(int id) const; int execReturnCode(QAbstractButton *button); void detectEscapeButton(); void updateSize(); int layoutMinimumWidth(); void retranslateStrings(); static int showOldMessageBox(QWidget *parent, QMessageBox::Icon icon, const QString &title, const QString &text, int button0, int button1, int button2); static int showOldMessageBox(QWidget *parent, QMessageBox::Icon icon, const QString &title, const QString &text, const QString &button0Text, const QString &button1Text, const QString &button2Text, int defaultButtonNumber, int escapeButtonNumber); static QMessageBox::StandardButton showNewMessageBox(QWidget *parent, QMessageBox::Icon icon, const QString& title, const QString& text, QMessageBox::StandardButtons buttons, QMessageBox::StandardButton defaultButton); static QPixmap standardIcon(QMessageBox::Icon icon, QMessageBox *mb); QLabel *label; QMessageBox::Icon icon; QLabel *iconLabel; QDialogButtonBox *buttonBox; QList customButtonList; QAbstractButton *escapeButton; QPushButton *defaultButton; QCheckBox *checkbox; QAbstractButton *clickedButton; DetailButton *detailsButton; #if QT_CONFIG(textedit) QMessageBoxDetailsText *detailsText; #endif bool compatMode; bool autoAddOkButton; QAbstractButton *detectedEscapeButton; QLabel *informativeLabel; QPointer receiverToDisconnectOnClose; QByteArray memberToDisconnectOnClose; QByteArray signalToDisconnectOnClose; QSharedPointer options; private: void initHelper(QPlatformDialogHelper *) Q_DECL_OVERRIDE; void helperPrepareShow(QPlatformDialogHelper *) Q_DECL_OVERRIDE; void helperDone(QDialog::DialogCode, QPlatformDialogHelper *) Q_DECL_OVERRIDE; }; void QMessageBoxPrivate::init(const QString &title, const QString &text) { Q_Q(QMessageBox); label = new QLabel; label->setObjectName(QLatin1String("qt_msgbox_label")); label->setTextInteractionFlags(Qt::TextInteractionFlags(q->style()->styleHint(QStyle::SH_MessageBox_TextInteractionFlags, 0, q))); label->setAlignment(Qt::AlignVCenter | Qt::AlignLeft); label->setOpenExternalLinks(true); iconLabel = new QLabel(q); iconLabel->setObjectName(QLatin1String("qt_msgboxex_icon_label")); iconLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed); buttonBox = new QDialogButtonBox; buttonBox->setObjectName(QLatin1String("qt_msgbox_buttonbox")); buttonBox->setCenterButtons(q->style()->styleHint(QStyle::SH_MessageBox_CenterButtons, 0, q)); QObject::connect(buttonBox, SIGNAL(clicked(QAbstractButton*)), q, SLOT(_q_buttonClicked(QAbstractButton*))); setupLayout(); if (!title.isEmpty() || !text.isEmpty()) { q->setWindowTitle(title); q->setText(text); } q->setModal(true); #ifdef Q_OS_MAC QFont f = q->font(); f.setBold(true); label->setFont(f); #endif icon = QMessageBox::NoIcon; } void QMessageBoxPrivate::setupLayout() { Q_Q(QMessageBox); delete q->layout(); QGridLayout *grid = new QGridLayout; bool hasIcon = iconLabel->pixmap() && !iconLabel->pixmap()->isNull(); if (hasIcon) grid->addWidget(iconLabel, 0, 0, 2, 1, Qt::AlignTop); iconLabel->setVisible(hasIcon); #ifdef Q_OS_MAC QSpacerItem *indentSpacer = new QSpacerItem(14, 1, QSizePolicy::Fixed, QSizePolicy::Fixed); #else QSpacerItem *indentSpacer = new QSpacerItem(hasIcon ? 7 : 15, 1, QSizePolicy::Fixed, QSizePolicy::Fixed); #endif grid->addItem(indentSpacer, 0, hasIcon ? 1 : 0, 2, 1); grid->addWidget(label, 0, hasIcon ? 2 : 1, 1, 1); if (informativeLabel) { #ifndef Q_OS_MAC informativeLabel->setContentsMargins(0, 7, 0, 7); #endif grid->addWidget(informativeLabel, 1, hasIcon ? 2 : 1, 1, 1); } if (checkbox) { grid->addWidget(checkbox, informativeLabel ? 2 : 1, hasIcon ? 2 : 1, 1, 1, Qt::AlignLeft); #ifdef Q_OS_MAC grid->addItem(new QSpacerItem(1, 15, QSizePolicy::Fixed, QSizePolicy::Fixed), grid->rowCount(), 0); #else grid->addItem(new QSpacerItem(1, 7, QSizePolicy::Fixed, QSizePolicy::Fixed), grid->rowCount(), 0); #endif } #ifdef Q_OS_MAC grid->addWidget(buttonBox, grid->rowCount(), hasIcon ? 2 : 1, 1, 1); grid->setMargin(0); grid->setVerticalSpacing(8); grid->setHorizontalSpacing(0); q->setContentsMargins(24, 15, 24, 20); grid->setRowStretch(1, 100); grid->setRowMinimumHeight(2, 6); #else grid->addWidget(buttonBox, grid->rowCount(), 0, 1, grid->columnCount()); #endif #if QT_CONFIG(textedit) if (detailsText) grid->addWidget(detailsText, grid->rowCount(), 0, 1, grid->columnCount()); #endif grid->setSizeConstraint(QLayout::SetNoConstraint); q->setLayout(grid); retranslateStrings(); updateSize(); } int QMessageBoxPrivate::layoutMinimumWidth() { layout->activate(); return layout->totalMinimumSize().width(); } void QMessageBoxPrivate::updateSize() { Q_Q(QMessageBox); if (!q->isVisible()) return; QSize screenSize = QApplication::desktop()->availableGeometry(QCursor::pos()).size(); int hardLimit = qMin(screenSize.width() - 480, 1000); // can never get bigger than this // on small screens allows the messagebox be the same size as the screen if (screenSize.width() <= 1024) hardLimit = screenSize.width(); #ifdef Q_OS_MAC int softLimit = qMin(screenSize.width()/2, 420); #else // note: ideally on windows, hard and soft limits but it breaks compat int softLimit = qMin(screenSize.width()/2, 500); #endif if (informativeLabel) informativeLabel->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored); label->setWordWrap(false); // makes the label return min size int width = layoutMinimumWidth(); if (width > softLimit) { label->setWordWrap(true); width = qMax(softLimit, layoutMinimumWidth()); if (width > hardLimit) { label->d_func()->ensureTextControl(); if (QWidgetTextControl *control = label->d_func()->control) { QTextOption opt = control->document()->defaultTextOption(); opt.setWrapMode(QTextOption::WrapAnywhere); control->document()->setDefaultTextOption(opt); } width = hardLimit; } } if (informativeLabel) { label->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored); QSizePolicy policy(QSizePolicy::Minimum, QSizePolicy::Preferred); policy.setHeightForWidth(true); informativeLabel->setSizePolicy(policy); width = qMax(width, layoutMinimumWidth()); if (width > hardLimit) { // longest word is really big, so wrap anywhere informativeLabel->d_func()->ensureTextControl(); if (QWidgetTextControl *control = informativeLabel->d_func()->control) { QTextOption opt = control->document()->defaultTextOption(); opt.setWrapMode(QTextOption::WrapAnywhere); control->document()->setDefaultTextOption(opt); } width = hardLimit; } policy.setHeightForWidth(label->wordWrap()); label->setSizePolicy(policy); } QFontMetrics fm(QApplication::font("QMdiSubWindowTitleBar")); int windowTitleWidth = qMin(fm.width(q->windowTitle()) + 50, hardLimit); if (windowTitleWidth > width) width = windowTitleWidth; layout->activate(); int height = (layout->hasHeightForWidth()) ? layout->totalHeightForWidth(width) : layout->totalMinimumSize().height(); q->setFixedSize(width, height); QCoreApplication::removePostedEvents(q, QEvent::LayoutRequest); } static int oldButton(int button) { switch (button & QMessageBox::ButtonMask) { case QMessageBox::Ok: return Old_Ok; case QMessageBox::Cancel: return Old_Cancel; case QMessageBox::Yes: return Old_Yes; case QMessageBox::No: return Old_No; case QMessageBox::Abort: return Old_Abort; case QMessageBox::Retry: return Old_Retry; case QMessageBox::Ignore: return Old_Ignore; case QMessageBox::YesToAll: return Old_YesAll; case QMessageBox::NoToAll: return Old_NoAll; default: return 0; } } int QMessageBoxPrivate::execReturnCode(QAbstractButton *button) { int ret = buttonBox->standardButton(button); if (ret == QMessageBox::NoButton) { ret = customButtonList.indexOf(button); // if button == 0, correctly sets ret = -1 } else if (compatMode) { ret = oldButton(ret); } return ret; } void QMessageBoxPrivate::_q_buttonClicked(QAbstractButton *button) { Q_Q(QMessageBox); #if QT_CONFIG(textedit) if (detailsButton && detailsText && button == detailsButton) { detailsButton->setLabel(detailsText->isHidden() ? HideLabel : ShowLabel); detailsText->setHidden(!detailsText->isHidden()); updateSize(); } else #endif { clickedButton = button; q->done(execReturnCode(button)); // does not trigger closeEvent emit q->buttonClicked(button); if (receiverToDisconnectOnClose) { QObject::disconnect(q, signalToDisconnectOnClose, receiverToDisconnectOnClose, memberToDisconnectOnClose); receiverToDisconnectOnClose = 0; } signalToDisconnectOnClose.clear(); memberToDisconnectOnClose.clear(); } } void QMessageBoxPrivate::_q_clicked(QPlatformDialogHelper::StandardButton button, QPlatformDialogHelper::ButtonRole role) { Q_UNUSED(role); Q_Q(QMessageBox); q->done(button); } /*! \class QMessageBox \brief The QMessageBox class provides a modal dialog for informing the user or for asking the user a question and receiving an answer. \ingroup standard-dialogs \inmodule QtWidgets A message box displays a primary \l{QMessageBox::text}{text} to alert the user to a situation, an \l{QMessageBox::informativeText} {informative text} to further explain the alert or to ask the user a question, and an optional \l{QMessageBox::detailedText} {detailed text} to provide even more data if the user requests it. A message box can also display an \l{QMessageBox::icon} {icon} and \l{QMessageBox::standardButtons} {standard buttons} for accepting a user response. Two APIs for using QMessageBox are provided, the property-based API, and the static functions. Calling one of the static functions is the simpler approach, but it is less flexible than using the property-based API, and the result is less informative. Using the property-based API is recommended. \section1 The Property-based API To use the property-based API, construct an instance of QMessageBox, set the desired properties, and call exec() to show the message. The simplest configuration is to set only the \l{QMessageBox::text} {message text} property. \snippet code/src_gui_dialogs_qmessagebox.cpp 5 The user must click the \uicontrol{OK} button to dismiss the message box. The rest of the GUI is blocked until the message box is dismissed. \image msgbox1.png A better approach than just alerting the user to an event is to also ask the user what to do about it. Store the question in the \l{QMessageBox::informativeText} {informative text} property, and set the \l{QMessageBox::standardButtons} {standard buttons} property to the set of buttons you want as the set of user responses. The buttons are specified by combining values from StandardButtons using the bitwise OR operator. The display order for the buttons is platform-dependent. For example, on Windows, \uicontrol{Save} is displayed to the left of \uicontrol{Cancel}, whereas on Mac OS, the order is reversed. Mark one of your standard buttons to be your \l{QMessageBox::defaultButton()} {default button}. \snippet code/src_gui_dialogs_qmessagebox.cpp 6 This is the approach recommended in the \l{http://developer.apple.com/library/mac/documentation/UserExperience/Conceptual/AppleHIGuidelines/Windows/Windows.html#//apple_ref/doc/uid/20000961-BABCAJID} {\macos Guidelines}. Similar guidelines apply for the other platforms, but note the different ways the \l{QMessageBox::informativeText} {informative text} is handled for different platforms. \image msgbox2.png The exec() slot returns the StandardButtons value of the button that was clicked. \snippet code/src_gui_dialogs_qmessagebox.cpp 7 To give the user more information to help him answer the question, set the \l{QMessageBox::detailedText} {detailed text} property. If the \l{QMessageBox::detailedText} {detailed text} property is set, the \uicontrol{Show Details...} button will be shown. \image msgbox3.png Clicking the \uicontrol{Show Details...} button displays the detailed text. \image msgbox4.png \section2 Rich Text and the Text Format Property The \l{QMessageBox::detailedText} {detailed text} property is always interpreted as plain text. The \l{QMessageBox::text} {main text} and \l{QMessageBox::informativeText} {informative text} properties can be either plain text or rich text. These strings are interpreted according to the setting of the \l{QMessageBox::textFormat} {text format} property. The default setting is \l{Qt::AutoText} {auto-text}. Note that for some plain text strings containing XML meta-characters, the auto-text \l{Qt::mightBeRichText()} {rich text detection test} may fail causing your plain text string to be interpreted incorrectly as rich text. In these rare cases, use Qt::convertFromPlainText() to convert your plain text string to a visually equivalent rich text string, or set the \l{QMessageBox::textFormat} {text format} property explicitly with setTextFormat(). \section2 Severity Levels and the Icon and Pixmap Properties QMessageBox supports four predefined message severity levels, or message types, which really only differ in the predefined icon they each show. Specify one of the four predefined message types by setting the \l{QMessageBox::icon}{icon} property to one of the \l{QMessageBox::Icon}{predefined icons}. The following rules are guidelines: \table \row \li \image qmessagebox-quest.png \li \l Question \li For asking a question during normal operations. \row \li \image qmessagebox-info.png \li \l Information \li For reporting information about normal operations. \row \li \image qmessagebox-warn.png \li \l Warning \li For reporting non-critical errors. \row \li \image qmessagebox-crit.png \li \l Critical \li For reporting critical errors. \endtable \l{QMessageBox::Icon}{Predefined icons} are not defined by QMessageBox, but provided by the style. The default value is \l{QMessageBox::NoIcon} {No Icon}. The message boxes are otherwise the same for all cases. When using a standard icon, use the one recommended in the table, or use the one recommended by the style guidelines for your platform. If none of the standard icons is right for your message box, you can use a custom icon by setting the \l{QMessageBox::iconPixmap}{icon pixmap} property instead of setting the \l{QMessageBox::icon}{icon} property. In summary, to set an icon, use \e{either} setIcon() for one of the standard icons, \e{or} setIconPixmap() for a custom icon. \section1 The Static Functions API Building message boxes with the static functions API, although convenient, is less flexible than using the property-based API, because the static function signatures lack parameters for setting the \l{QMessageBox::informativeText} {informative text} and \l{QMessageBox::detailedText} {detailed text} properties. One work-around for this has been to use the \c{title} parameter as the message box main text and the \c{text} parameter as the message box informative text. Because this has the obvious drawback of making a less readable message box, platform guidelines do not recommend it. The \e{Microsoft Windows User Interface Guidelines} recommend using the \l{QCoreApplication::applicationName} {application name} as the \l{QMessageBox::setWindowTitle()} {window's title}, which means that if you have an informative text in addition to your main text, you must concatenate it to the \c{text} parameter. Note that the static function signatures have changed with respect to their button parameters, which are now used to set the \l{QMessageBox::standardButtons} {standard buttons} and the \l{QMessageBox::defaultButton()} {default button}. Static functions are available for creating information(), question(), warning(), and critical() message boxes. \snippet code/src_gui_dialogs_qmessagebox.cpp 0 The \l{dialogs/standarddialogs}{Standard Dialogs} example shows how to use QMessageBox and the other built-in Qt dialogs. \section1 Advanced Usage If the \l{QMessageBox::StandardButtons} {standard buttons} are not flexible enough for your message box, you can use the addButton() overload that takes a text and a ButtonRole to add custom buttons. The ButtonRole is used by QMessageBox to determine the ordering of the buttons on screen (which varies according to the platform). You can test the value of clickedButton() after calling exec(). For example, \snippet code/src_gui_dialogs_qmessagebox.cpp 2 \section1 Default and Escape Keys The default button (i.e., the button activated when \uicontrol Enter is pressed) can be specified using setDefaultButton(). If a default button is not specified, QMessageBox tries to find one based on the \l{ButtonRole} {button roles} of the buttons used in the message box. The escape button (the button activated when \uicontrol Esc is pressed) can be specified using setEscapeButton(). If an escape button is not specified, QMessageBox tries to find one using these rules: \list 1 \li If there is only one button, it is the button activated when \uicontrol Esc is pressed. \li If there is a \l Cancel button, it is the button activated when \uicontrol Esc is pressed. \li If there is exactly one button having either \l{QMessageBox::RejectRole} {the Reject role} or the \l{QMessageBox::NoRole} {the No role}, it is the button activated when \uicontrol Esc is pressed. \endlist When an escape button can't be determined using these rules, pressing \uicontrol Esc has no effect. \sa QDialogButtonBox, {fowler}{GUI Design Handbook: Message Box}, {Standard Dialogs Example}, {Application Example} */ /*! \enum QMessageBox::StandardButton \since 4.2 These enums describe flags for standard buttons. Each button has a defined \l ButtonRole. \value Ok An "OK" button defined with the \l AcceptRole. \value Open An "Open" button defined with the \l AcceptRole. \value Save A "Save" button defined with the \l AcceptRole. \value Cancel A "Cancel" button defined with the \l RejectRole. \value Close A "Close" button defined with the \l RejectRole. \value Discard A "Discard" or "Don't Save" button, depending on the platform, defined with the \l DestructiveRole. \value Apply An "Apply" button defined with the \l ApplyRole. \value Reset A "Reset" button defined with the \l ResetRole. \value RestoreDefaults A "Restore Defaults" button defined with the \l ResetRole. \value Help A "Help" button defined with the \l HelpRole. \value SaveAll A "Save All" button defined with the \l AcceptRole. \value Yes A "Yes" button defined with the \l YesRole. \value YesToAll A "Yes to All" button defined with the \l YesRole. \value No A "No" button defined with the \l NoRole. \value NoToAll A "No to All" button defined with the \l NoRole. \value Abort An "Abort" button defined with the \l RejectRole. \value Retry A "Retry" button defined with the \l AcceptRole. \value Ignore An "Ignore" button defined with the \l AcceptRole. \value NoButton An invalid button. \omitvalue FirstButton \omitvalue LastButton The following values are obsolete: \value YesAll Use YesToAll instead. \value NoAll Use NoToAll instead. \value Default Use the \c defaultButton argument of information(), warning(), etc. instead, or call setDefaultButton(). \value Escape Call setEscapeButton() instead. \value FlagMask \value ButtonMask \sa ButtonRole, standardButtons */ /*! \fn void QMessageBox::buttonClicked(QAbstractButton *button) This signal is emitted whenever a button is clicked inside the QMessageBox. The button that was clicked in returned in \a button. */ /*! Constructs a message box with no text and no buttons. \a parent is passed to the QDialog constructor. On \macos, if you want your message box to appear as a Qt::Sheet of its \a parent, set the message box's \l{setWindowModality()} {window modality} to Qt::WindowModal or use open(). Otherwise, the message box will be a standard dialog. */ QMessageBox::QMessageBox(QWidget *parent) : QDialog(*new QMessageBoxPrivate, parent, Qt::MSWindowsFixedSizeDialogHint | Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint) { Q_D(QMessageBox); d->init(); } /*! Constructs a message box with the given \a icon, \a title, \a text, and standard \a buttons. Standard or custom buttons can be added at any time using addButton(). The \a parent and \a f arguments are passed to the QDialog constructor. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. On \macos, if \a parent is not 0 and you want your message box to appear as a Qt::Sheet of that parent, set the message box's \l{setWindowModality()} {window modality} to Qt::WindowModal (default). Otherwise, the message box will be a standard dialog. \sa setWindowTitle(), setText(), setIcon(), setStandardButtons() */ QMessageBox::QMessageBox(Icon icon, const QString &title, const QString &text, StandardButtons buttons, QWidget *parent, Qt::WindowFlags f) : QDialog(*new QMessageBoxPrivate, parent, f | Qt::MSWindowsFixedSizeDialogHint | Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint) { Q_D(QMessageBox); d->init(title, text); setIcon(icon); if (buttons != NoButton) setStandardButtons(buttons); } /*! Destroys the message box. */ QMessageBox::~QMessageBox() { } /*! \since 4.2 Adds the given \a button to the message box with the specified \a role. \sa removeButton(), button(), setStandardButtons() */ void QMessageBox::addButton(QAbstractButton *button, ButtonRole role) { Q_D(QMessageBox); if (!button) return; removeButton(button); d->buttonBox->addButton(button, (QDialogButtonBox::ButtonRole)role); d->customButtonList.append(button); d->autoAddOkButton = false; } /*! \since 4.2 \overload Creates a button with the given \a text, adds it to the message box for the specified \a role, and returns it. */ QPushButton *QMessageBox::addButton(const QString& text, ButtonRole role) { Q_D(QMessageBox); QPushButton *pushButton = new QPushButton(text); addButton(pushButton, role); d->updateSize(); return pushButton; } /*! \since 4.2 \overload Adds a standard \a button to the message box if it is valid to do so, and returns the push button. \sa setStandardButtons() */ QPushButton *QMessageBox::addButton(StandardButton button) { Q_D(QMessageBox); QPushButton *pushButton = d->buttonBox->addButton((QDialogButtonBox::StandardButton)button); if (pushButton) d->autoAddOkButton = false; return pushButton; } /*! \since 4.2 Removes \a button from the button box without deleting it. \sa addButton(), setStandardButtons() */ void QMessageBox::removeButton(QAbstractButton *button) { Q_D(QMessageBox); d->customButtonList.removeAll(button); if (d->escapeButton == button) d->escapeButton = 0; if (d->defaultButton == button) d->defaultButton = 0; d->buttonBox->removeButton(button); d->updateSize(); } /*! \property QMessageBox::standardButtons \brief collection of standard buttons in the message box \since 4.2 This property controls which standard buttons are used by the message box. By default, this property contains no standard buttons. \sa addButton() */ void QMessageBox::setStandardButtons(StandardButtons buttons) { Q_D(QMessageBox); d->buttonBox->setStandardButtons(QDialogButtonBox::StandardButtons(int(buttons))); QList buttonList = d->buttonBox->buttons(); if (!buttonList.contains(d->escapeButton)) d->escapeButton = 0; if (!buttonList.contains(d->defaultButton)) d->defaultButton = 0; d->autoAddOkButton = false; d->updateSize(); } QMessageBox::StandardButtons QMessageBox::standardButtons() const { Q_D(const QMessageBox); return QMessageBox::StandardButtons(int(d->buttonBox->standardButtons())); } /*! \since 4.2 Returns the standard button enum value corresponding to the given \a button, or NoButton if the given \a button isn't a standard button. \sa button(), standardButtons() */ QMessageBox::StandardButton QMessageBox::standardButton(QAbstractButton *button) const { Q_D(const QMessageBox); return (QMessageBox::StandardButton)d->buttonBox->standardButton(button); } /*! \since 4.2 Returns a pointer corresponding to the standard button \a which, or 0 if the standard button doesn't exist in this message box. \sa standardButtons, standardButton() */ QAbstractButton *QMessageBox::button(StandardButton which) const { Q_D(const QMessageBox); return d->buttonBox->button(QDialogButtonBox::StandardButton(which)); } /*! \since 4.2 Returns the button that is activated when escape is pressed. By default, QMessageBox attempts to automatically detect an escape button as follows: \list 1 \li If there is only one button, it is made the escape button. \li If there is a \l Cancel button, it is made the escape button. \li On \macos only, if there is exactly one button with the role QMessageBox::RejectRole, it is made the escape button. \endlist When an escape button could not be automatically detected, pressing \uicontrol Esc has no effect. \sa addButton() */ QAbstractButton *QMessageBox::escapeButton() const { Q_D(const QMessageBox); return d->escapeButton; } /*! \since 4.2 Sets the button that gets activated when the \uicontrol Escape key is pressed to \a button. \sa addButton(), clickedButton() */ void QMessageBox::setEscapeButton(QAbstractButton *button) { Q_D(QMessageBox); if (d->buttonBox->buttons().contains(button)) d->escapeButton = button; } /*! \since 4.3 Sets the buttons that gets activated when the \uicontrol Escape key is pressed to \a button. \sa addButton(), clickedButton() */ void QMessageBox::setEscapeButton(QMessageBox::StandardButton button) { Q_D(QMessageBox); setEscapeButton(d->buttonBox->button(QDialogButtonBox::StandardButton(button))); } void QMessageBoxPrivate::detectEscapeButton() { if (escapeButton) { // escape button explicitly set detectedEscapeButton = escapeButton; return; } // Cancel button automatically becomes escape button detectedEscapeButton = buttonBox->button(QDialogButtonBox::Cancel); if (detectedEscapeButton) return; // If there is only one button, make it the escape button const QList buttons = buttonBox->buttons(); if (buttons.count() == 1) { detectedEscapeButton = buttons.first(); return; } // if the message box has one RejectRole button, make it the escape button for (auto *button : buttons) { if (buttonBox->buttonRole(button) == QDialogButtonBox::RejectRole) { if (detectedEscapeButton) { // already detected! detectedEscapeButton = 0; break; } detectedEscapeButton = button; } } if (detectedEscapeButton) return; // if the message box has one NoRole button, make it the escape button for (auto *button : buttons) { if (buttonBox->buttonRole(button) == QDialogButtonBox::NoRole) { if (detectedEscapeButton) { // already detected! detectedEscapeButton = 0; break; } detectedEscapeButton = button; } } } /*! \since 4.2 Returns the button that was clicked by the user, or 0 if the user hit the \uicontrol Esc key and no \l{setEscapeButton()}{escape button} was set. If exec() hasn't been called yet, returns 0. Example: \snippet code/src_gui_dialogs_qmessagebox.cpp 3 \sa standardButton(), button() */ QAbstractButton *QMessageBox::clickedButton() const { Q_D(const QMessageBox); return d->clickedButton; } /*! \since 4.2 Returns the button that should be the message box's \l{QPushButton::setDefault()}{default button}. Returns 0 if no default button was set. \sa addButton(), QPushButton::setDefault() */ QPushButton *QMessageBox::defaultButton() const { Q_D(const QMessageBox); return d->defaultButton; } /*! \since 4.2 Sets the message box's \l{QPushButton::setDefault()}{default button} to \a button. \sa addButton(), QPushButton::setDefault() */ void QMessageBox::setDefaultButton(QPushButton *button) { Q_D(QMessageBox); if (!d->buttonBox->buttons().contains(button)) return; d->defaultButton = button; button->setDefault(true); button->setFocus(); } /*! \since 4.3 Sets the message box's \l{QPushButton::setDefault()}{default button} to \a button. \sa addButton(), QPushButton::setDefault() */ void QMessageBox::setDefaultButton(QMessageBox::StandardButton button) { Q_D(QMessageBox); setDefaultButton(d->buttonBox->button(QDialogButtonBox::StandardButton(button))); } /*! \since 5.2 Sets the checkbox \a cb on the message dialog. The message box takes ownership of the checkbox. The argument \a cb can be 0 to remove an existing checkbox from the message box. \sa checkBox() */ void QMessageBox::setCheckBox(QCheckBox *cb) { Q_D(QMessageBox); if (cb == d->checkbox) return; if (d->checkbox) { d->checkbox->hide(); layout()->removeWidget(d->checkbox); if (d->checkbox->parentWidget() == this) { d->checkbox->setParent(0); d->checkbox->deleteLater(); } } d->checkbox = cb; if (d->checkbox) { QSizePolicy sp = d->checkbox->sizePolicy(); sp.setHorizontalPolicy(QSizePolicy::MinimumExpanding); d->checkbox->setSizePolicy(sp); } d->setupLayout(); } /*! \since 5.2 Returns the checkbox shown on the dialog. This is 0 if no checkbox is set. \sa setCheckBox() */ QCheckBox* QMessageBox::checkBox() const { Q_D(const QMessageBox); return d->checkbox; } /*! \property QMessageBox::text \brief the message box text to be displayed. The text will be interpreted either as a plain text or as rich text, depending on the text format setting (\l QMessageBox::textFormat). The default setting is Qt::AutoText, i.e., the message box will try to auto-detect the format of the text. The default value of this property is an empty string. \sa textFormat, QMessageBox::informativeText, QMessageBox::detailedText */ QString QMessageBox::text() const { Q_D(const QMessageBox); return d->label->text(); } void QMessageBox::setText(const QString &text) { Q_D(QMessageBox); d->label->setText(text); d->label->setWordWrap(d->label->textFormat() == Qt::RichText || (d->label->textFormat() == Qt::AutoText && Qt::mightBeRichText(text))); d->updateSize(); } /*! \enum QMessageBox::Icon This enum has the following values: \value NoIcon the message box does not have any icon. \value Question an icon indicating that the message is asking a question. \value Information an icon indicating that the message is nothing out of the ordinary. \value Warning an icon indicating that the message is a warning, but can be dealt with. \value Critical an icon indicating that the message represents a critical problem. */ /*! \property QMessageBox::icon \brief the message box's icon The icon of the message box can be specified with one of the values: \list \li QMessageBox::NoIcon \li QMessageBox::Question \li QMessageBox::Information \li QMessageBox::Warning \li QMessageBox::Critical \endlist The default is QMessageBox::NoIcon. The pixmap used to display the actual icon depends on the current \l{QWidget::style()} {GUI style}. You can also set a custom pixmap for the icon by setting the \l{QMessageBox::iconPixmap} {icon pixmap} property. \sa iconPixmap */ QMessageBox::Icon QMessageBox::icon() const { Q_D(const QMessageBox); return d->icon; } void QMessageBox::setIcon(Icon icon) { Q_D(QMessageBox); setIconPixmap(QMessageBoxPrivate::standardIcon((QMessageBox::Icon)icon, this)); d->icon = icon; } /*! \property QMessageBox::iconPixmap \brief the current icon The icon currently used by the message box. Note that it's often hard to draw one pixmap that looks appropriate in all GUI styles; you may want to supply a different pixmap for each platform. By default, this property is undefined. \sa icon */ QPixmap QMessageBox::iconPixmap() const { Q_D(const QMessageBox); if (d->iconLabel && d->iconLabel->pixmap()) return *d->iconLabel->pixmap(); return QPixmap(); } void QMessageBox::setIconPixmap(const QPixmap &pixmap) { Q_D(QMessageBox); d->iconLabel->setPixmap(pixmap); d->icon = NoIcon; d->setupLayout(); } /*! \property QMessageBox::textFormat \brief the format of the text displayed by the message box The current text format used by the message box. See the \l Qt::TextFormat enum for an explanation of the possible options. The default format is Qt::AutoText. \sa setText() */ Qt::TextFormat QMessageBox::textFormat() const { Q_D(const QMessageBox); return d->label->textFormat(); } void QMessageBox::setTextFormat(Qt::TextFormat format) { Q_D(QMessageBox); d->label->setTextFormat(format); d->label->setWordWrap(format == Qt::RichText || (format == Qt::AutoText && Qt::mightBeRichText(d->label->text()))); d->updateSize(); } /*! \property QMessageBox::textInteractionFlags \since 5.1 Specifies how the label of the message box should interact with user input. The default value depends on the style. \sa QStyle::SH_MessageBox_TextInteractionFlags */ Qt::TextInteractionFlags QMessageBox::textInteractionFlags() const { Q_D(const QMessageBox); return d->label->textInteractionFlags(); } void QMessageBox::setTextInteractionFlags(Qt::TextInteractionFlags flags) { Q_D(QMessageBox); d->label->setTextInteractionFlags(flags); } /*! \reimp */ bool QMessageBox::event(QEvent *e) { bool result =QDialog::event(e); switch (e->type()) { case QEvent::LayoutRequest: d_func()->updateSize(); break; case QEvent::LanguageChange: d_func()->retranslateStrings(); break; default: break; } return result; } /*! \reimp */ void QMessageBox::resizeEvent(QResizeEvent *event) { QDialog::resizeEvent(event); } /*! \reimp */ void QMessageBox::closeEvent(QCloseEvent *e) { Q_D(QMessageBox); if (!d->detectedEscapeButton) { e->ignore(); return; } QDialog::closeEvent(e); d->clickedButton = d->detectedEscapeButton; setResult(d->execReturnCode(d->detectedEscapeButton)); } /*! \reimp */ void QMessageBox::changeEvent(QEvent *ev) { Q_D(QMessageBox); switch (ev->type()) { case QEvent::StyleChange: { if (d->icon != NoIcon) setIcon(d->icon); Qt::TextInteractionFlags flags(style()->styleHint(QStyle::SH_MessageBox_TextInteractionFlags, 0, this)); d->label->setTextInteractionFlags(flags); d->buttonBox->setCenterButtons(style()->styleHint(QStyle::SH_MessageBox_CenterButtons, 0, this)); if (d->informativeLabel) d->informativeLabel->setTextInteractionFlags(flags); Q_FALLTHROUGH(); } case QEvent::FontChange: case QEvent::ApplicationFontChange: #ifdef Q_OS_MAC { QFont f = font(); f.setBold(true); d->label->setFont(f); } #endif Q_FALLTHROUGH(); default: break; } QDialog::changeEvent(ev); } /*! \reimp */ void QMessageBox::keyPressEvent(QKeyEvent *e) { #if QT_CONFIG(shortcut) Q_D(QMessageBox); if (e->matches(QKeySequence::Cancel)) { if (d->detectedEscapeButton) { #ifdef Q_OS_MAC d->detectedEscapeButton->animateClick(); #else d->detectedEscapeButton->click(); #endif } return; } #endif // QT_CONFIG(shortcut) #if !defined(QT_NO_CLIPBOARD) && !defined(QT_NO_SHORTCUT) #if QT_CONFIG(textedit) if (e == QKeySequence::Copy) { if (d->detailsText && d->detailsText->isVisible() && d->detailsText->copy()) { e->setAccepted(true); return; } } else if (e == QKeySequence::SelectAll && d->detailsText && d->detailsText->isVisible()) { d->detailsText->selectAll(); e->setAccepted(true); return; } #endif // QT_CONFIG(textedit) #if defined(Q_OS_WIN) if (e == QKeySequence::Copy) { const QLatin1String separator("---------------------------\n"); QString textToCopy; textToCopy += separator + windowTitle() + QLatin1Char('\n') + separator // title + d->label->text() + QLatin1Char('\n') + separator; // text if (d->informativeLabel) textToCopy += d->informativeLabel->text() + QLatin1Char('\n') + separator; const QList buttons = d->buttonBox->buttons(); for (const auto *button : buttons) textToCopy += button->text() + QLatin1String(" "); textToCopy += QLatin1Char('\n') + separator; #if QT_CONFIG(textedit) if (d->detailsText) textToCopy += d->detailsText->text() + QLatin1Char('\n') + separator; #endif QApplication::clipboard()->setText(textToCopy); return; } #endif // Q_OS_WIN #endif // !QT_NO_CLIPBOARD && !QT_NO_SHORTCUT #ifndef QT_NO_SHORTCUT if (!(e->modifiers() & (Qt::AltModifier | Qt::ControlModifier | Qt::MetaModifier))) { int key = e->key() & ~Qt::MODIFIER_MASK; if (key) { const QList buttons = d->buttonBox->buttons(); for (auto *pb : buttons) { QKeySequence shortcut = pb->shortcut(); if (!shortcut.isEmpty() && key == int(shortcut[0] & ~Qt::MODIFIER_MASK)) { pb->animateClick(); return; } } } } #endif QDialog::keyPressEvent(e); } /*! \overload Opens the dialog and connects its finished() or buttonClicked() signal to the slot specified by \a receiver and \a member. If the slot in \a member has a pointer for its first parameter the connection is to buttonClicked(), otherwise the connection is to finished(). The signal will be disconnected from the slot when the dialog is closed. */ void QMessageBox::open(QObject *receiver, const char *member) { Q_D(QMessageBox); const char *signal = member && strchr(member, '*') ? SIGNAL(buttonClicked(QAbstractButton*)) : SIGNAL(finished(int)); connect(this, signal, receiver, member); d->signalToDisconnectOnClose = signal; d->receiverToDisconnectOnClose = receiver; d->memberToDisconnectOnClose = member; QDialog::open(); } /*! \since 4.5 Returns a list of all the buttons that have been added to the message box. \sa buttonRole(), addButton(), removeButton() */ QList QMessageBox::buttons() const { Q_D(const QMessageBox); return d->buttonBox->buttons(); } /*! \since 4.5 Returns the button role for the specified \a button. This function returns \l InvalidRole if \a button is 0 or has not been added to the message box. \sa buttons(), addButton() */ QMessageBox::ButtonRole QMessageBox::buttonRole(QAbstractButton *button) const { Q_D(const QMessageBox); return QMessageBox::ButtonRole(d->buttonBox->buttonRole(button)); } /*! \reimp */ void QMessageBox::showEvent(QShowEvent *e) { Q_D(QMessageBox); if (d->autoAddOkButton) { addButton(Ok); } if (d->detailsButton) addButton(d->detailsButton, QMessageBox::ActionRole); d->detectEscapeButton(); d->updateSize(); #ifndef QT_NO_ACCESSIBILITY QAccessibleEvent event(this, QAccessible::Alert); QAccessible::updateAccessibility(&event); #endif #if defined(Q_OS_WIN) && !defined(Q_OS_WINRT) if (const HMENU systemMenu = qt_getWindowsSystemMenu(this)) { EnableMenuItem(systemMenu, SC_CLOSE, d->detectedEscapeButton ? MF_BYCOMMAND|MF_ENABLED : MF_BYCOMMAND|MF_GRAYED); } #endif QDialog::showEvent(e); } static QMessageBox::StandardButton showNewMessageBox(QWidget *parent, QMessageBox::Icon icon, const QString& title, const QString& text, QMessageBox::StandardButtons buttons, QMessageBox::StandardButton defaultButton) { // necessary for source compatibility with Qt 4.0 and 4.1 // handles (Yes, No) and (Yes|Default, No) if (defaultButton && !(buttons & defaultButton)) return (QMessageBox::StandardButton) QMessageBoxPrivate::showOldMessageBox(parent, icon, title, text, int(buttons), int(defaultButton), 0); QMessageBox msgBox(icon, title, text, QMessageBox::NoButton, parent); QDialogButtonBox *buttonBox = msgBox.findChild(); Q_ASSERT(buttonBox != 0); uint mask = QMessageBox::FirstButton; while (mask <= QMessageBox::LastButton) { uint sb = buttons & mask; mask <<= 1; if (!sb) continue; QPushButton *button = msgBox.addButton((QMessageBox::StandardButton)sb); // Choose the first accept role as the default if (msgBox.defaultButton()) continue; if ((defaultButton == QMessageBox::NoButton && buttonBox->buttonRole(button) == QDialogButtonBox::AcceptRole) || (defaultButton != QMessageBox::NoButton && sb == uint(defaultButton))) msgBox.setDefaultButton(button); } if (msgBox.exec() == -1) return QMessageBox::Cancel; return msgBox.standardButton(msgBox.clickedButton()); } /*! \since 4.2 Opens an information message box with the given \a title and \a text in front of the specified \a parent widget. The standard \a buttons are added to the message box. \a defaultButton specifies the button used when \uicontrol Enter is pressed. \a defaultButton must refer to a button that was given in \a buttons. If \a defaultButton is QMessageBox::NoButton, QMessageBox chooses a suitable default automatically. Returns the identity of the standard button that was clicked. If \uicontrol Esc was pressed instead, the \l{Default and Escape Keys} {escape button} is returned. The message box is an \l{Qt::ApplicationModal}{application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa question(), warning(), critical() */ QMessageBox::StandardButton QMessageBox::information(QWidget *parent, const QString &title, const QString& text, StandardButtons buttons, StandardButton defaultButton) { return showNewMessageBox(parent, Information, title, text, buttons, defaultButton); } /*! \since 4.2 Opens a question message box with the given \a title and \a text in front of the specified \a parent widget. The standard \a buttons are added to the message box. \a defaultButton specifies the button used when \uicontrol Enter is pressed. \a defaultButton must refer to a button that was given in \a buttons. If \a defaultButton is QMessageBox::NoButton, QMessageBox chooses a suitable default automatically. Returns the identity of the standard button that was clicked. If \uicontrol Esc was pressed instead, the \l{Default and Escape Keys} {escape button} is returned. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa information(), warning(), critical() */ QMessageBox::StandardButton QMessageBox::question(QWidget *parent, const QString &title, const QString& text, StandardButtons buttons, StandardButton defaultButton) { return showNewMessageBox(parent, Question, title, text, buttons, defaultButton); } /*! \since 4.2 Opens a warning message box with the given \a title and \a text in front of the specified \a parent widget. The standard \a buttons are added to the message box. \a defaultButton specifies the button used when \uicontrol Enter is pressed. \a defaultButton must refer to a button that was given in \a buttons. If \a defaultButton is QMessageBox::NoButton, QMessageBox chooses a suitable default automatically. Returns the identity of the standard button that was clicked. If \uicontrol Esc was pressed instead, the \l{Default and Escape Keys} {escape button} is returned. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa question(), information(), critical() */ QMessageBox::StandardButton QMessageBox::warning(QWidget *parent, const QString &title, const QString& text, StandardButtons buttons, StandardButton defaultButton) { return showNewMessageBox(parent, Warning, title, text, buttons, defaultButton); } /*! \since 4.2 Opens a critical message box with the given \a title and \a text in front of the specified \a parent widget. The standard \a buttons are added to the message box. \a defaultButton specifies the button used when \uicontrol Enter is pressed. \a defaultButton must refer to a button that was given in \a buttons. If \a defaultButton is QMessageBox::NoButton, QMessageBox chooses a suitable default automatically. Returns the identity of the standard button that was clicked. If \uicontrol Esc was pressed instead, the \l{Default and Escape Keys} {escape button} is returned. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa question(), warning(), information() */ QMessageBox::StandardButton QMessageBox::critical(QWidget *parent, const QString &title, const QString& text, StandardButtons buttons, StandardButton defaultButton) { return showNewMessageBox(parent, Critical, title, text, buttons, defaultButton); } /*! Displays a simple about box with title \a title and text \a text. The about box's parent is \a parent. about() looks for a suitable icon in four locations: \list 1 \li It prefers \l{QWidget::windowIcon()}{parent->icon()} if that exists. \li If not, it tries the top-level widget containing \a parent. \li If that fails, it tries the \l{QApplication::activeWindow()}{active window.} \li As a last resort it uses the Information icon. \endlist The about box has a single button labelled "OK". On \macos, the about box is popped up as a modeless window; on other platforms, it is currently application modal. \sa QWidget::windowIcon(), QApplication::activeWindow() */ void QMessageBox::about(QWidget *parent, const QString &title, const QString &text) { #ifdef Q_OS_MAC static QPointer oldMsgBox; if (oldMsgBox && oldMsgBox->text() == text) { oldMsgBox->show(); oldMsgBox->raise(); oldMsgBox->activateWindow(); return; } #endif QMessageBox *msgBox = new QMessageBox(title, text, Information, 0, 0, 0, parent #ifdef Q_OS_MAC , Qt::WindowTitleHint | Qt::WindowSystemMenuHint #endif ); msgBox->setAttribute(Qt::WA_DeleteOnClose); QIcon icon = msgBox->windowIcon(); QSize size = icon.actualSize(QSize(64, 64)); msgBox->setIconPixmap(icon.pixmap(size)); // should perhaps be a style hint #ifdef Q_OS_MAC oldMsgBox = msgBox; #if 0 // ### doesn't work until close button is enabled in title bar msgBox->d_func()->autoAddOkButton = false; #else msgBox->d_func()->buttonBox->setCenterButtons(true); #endif msgBox->show(); #else msgBox->exec(); #endif } /*! Displays a simple message box about Qt, with the given \a title and centered over \a parent (if \a parent is not 0). The message includes the version number of Qt being used by the application. This is useful for inclusion in the \uicontrol Help menu of an application, as shown in the \l{mainwindows/menus}{Menus} example. QApplication provides this functionality as a slot. On \macos, the about box is popped up as a modeless window; on other platforms, it is currently application modal. \sa QApplication::aboutQt() */ void QMessageBox::aboutQt(QWidget *parent, const QString &title) { #ifdef Q_OS_MAC static QPointer oldMsgBox; if (oldMsgBox) { oldMsgBox->show(); oldMsgBox->raise(); oldMsgBox->activateWindow(); return; } #endif QString translatedTextAboutQtCaption; translatedTextAboutQtCaption = QMessageBox::tr( "

About Qt

" "

This program uses Qt version %1.

" ).arg(QLatin1String(QT_VERSION_STR)); QString translatedTextAboutQtText; translatedTextAboutQtText = QMessageBox::tr( "

Qt is a C++ toolkit for cross-platform application " "development.

" "

Qt provides single-source portability across all major desktop " "operating systems. It is also available for embedded Linux and other " "embedded and mobile operating systems.

" "

Qt is available under three different licensing options designed " "to accommodate the needs of our various users.

" "

Qt licensed under our commercial license agreement is appropriate " "for development of proprietary/commercial software where you do not " "want to share any source code with third parties or otherwise cannot " "comply with the terms of the GNU LGPL version 3.

" "

Qt licensed under the GNU LGPL version 3 is appropriate for the " "development of Qt applications provided you can comply with the terms " "and conditions of the GNU LGPL version 3.

" "

Please see %2 " "for an overview of Qt licensing.

" "

Copyright (C) %1 The Qt Company Ltd and other " "contributors.

" "

Qt and the Qt logo are trademarks of The Qt Company Ltd.

" "

Qt is The Qt Company Ltd product developed as an open source " "project. See %3 for more information.

" ).arg(QStringLiteral("2018"), QStringLiteral("qt.io/licensing"), QStringLiteral("qt.io")); QMessageBox *msgBox = new QMessageBox(parent); msgBox->setAttribute(Qt::WA_DeleteOnClose); msgBox->setWindowTitle(title.isEmpty() ? tr("About Qt") : title); msgBox->setText(translatedTextAboutQtCaption); msgBox->setInformativeText(translatedTextAboutQtText); QPixmap pm(QLatin1String(":/qt-project.org/qmessagebox/images/qtlogo-64.png")); if (!pm.isNull()) msgBox->setIconPixmap(pm); // should perhaps be a style hint #ifdef Q_OS_MAC oldMsgBox = msgBox; #if 0 // ### doesn't work until close button is enabled in title bar msgBox->d_func()->autoAddOkButton = false; #else msgBox->d_func()->buttonBox->setCenterButtons(true); #endif msgBox->show(); #else msgBox->exec(); #endif } ///////////////////////////////////////////////////////////////////////////////////////// // Source and binary compatibility routines for 4.0 and 4.1 static QMessageBox::StandardButton newButton(int button) { // this is needed for source compatibility with Qt 4.0 and 4.1 if (button == QMessageBox::NoButton || (button & NewButtonMask)) return QMessageBox::StandardButton(button & QMessageBox::ButtonMask); #if QT_VERSION < 0x050000 // this is needed for binary compatibility with Qt 4.0 and 4.1 switch (button & Old_ButtonMask) { case Old_Ok: return QMessageBox::Ok; case Old_Cancel: return QMessageBox::Cancel; case Old_Yes: return QMessageBox::Yes; case Old_No: return QMessageBox::No; case Old_Abort: return QMessageBox::Abort; case Old_Retry: return QMessageBox::Retry; case Old_Ignore: return QMessageBox::Ignore; case Old_YesAll: return QMessageBox::YesToAll; case Old_NoAll: return QMessageBox::NoToAll; default: return QMessageBox::NoButton; } #else return QMessageBox::NoButton; #endif } static bool detectedCompat(int button0, int button1, int button2) { if (button0 != 0 && !(button0 & NewButtonMask)) return true; if (button1 != 0 && !(button1 & NewButtonMask)) return true; if (button2 != 0 && !(button2 & NewButtonMask)) return true; return false; } QAbstractButton *QMessageBoxPrivate::findButton(int button0, int button1, int button2, int flags) { Q_Q(QMessageBox); int button = 0; if (button0 & flags) { button = button0; } else if (button1 & flags) { button = button1; } else if (button2 & flags) { button = button2; } return q->button(newButton(button)); } void QMessageBoxPrivate::addOldButtons(int button0, int button1, int button2) { Q_Q(QMessageBox); q->addButton(newButton(button0)); q->addButton(newButton(button1)); q->addButton(newButton(button2)); q->setDefaultButton( static_cast(findButton(button0, button1, button2, QMessageBox::Default))); q->setEscapeButton(findButton(button0, button1, button2, QMessageBox::Escape)); compatMode = detectedCompat(button0, button1, button2); } QAbstractButton *QMessageBoxPrivate::abstractButtonForId(int id) const { Q_Q(const QMessageBox); QAbstractButton *result = customButtonList.value(id); if (result) return result; if (id & QMessageBox::FlagMask) // for compatibility with Qt 4.0/4.1 (even if it is silly) return 0; return q->button(newButton(id)); } int QMessageBoxPrivate::showOldMessageBox(QWidget *parent, QMessageBox::Icon icon, const QString &title, const QString &text, int button0, int button1, int button2) { QMessageBox messageBox(icon, title, text, QMessageBox::NoButton, parent); messageBox.d_func()->addOldButtons(button0, button1, button2); return messageBox.exec(); } int QMessageBoxPrivate::showOldMessageBox(QWidget *parent, QMessageBox::Icon icon, const QString &title, const QString &text, const QString &button0Text, const QString &button1Text, const QString &button2Text, int defaultButtonNumber, int escapeButtonNumber) { QMessageBox messageBox(icon, title, text, QMessageBox::NoButton, parent); QString myButton0Text = button0Text; if (myButton0Text.isEmpty()) myButton0Text = QDialogButtonBox::tr("OK"); messageBox.addButton(myButton0Text, QMessageBox::ActionRole); if (!button1Text.isEmpty()) messageBox.addButton(button1Text, QMessageBox::ActionRole); if (!button2Text.isEmpty()) messageBox.addButton(button2Text, QMessageBox::ActionRole); const QList &buttonList = messageBox.d_func()->customButtonList; messageBox.setDefaultButton(static_cast(buttonList.value(defaultButtonNumber))); messageBox.setEscapeButton(buttonList.value(escapeButtonNumber)); return messageBox.exec(); } void QMessageBoxPrivate::retranslateStrings() { #if QT_CONFIG(textedit) if (detailsButton) detailsButton->setLabel(detailsText->isHidden() ? ShowLabel : HideLabel); #endif } /*! \obsolete Constructs a message box with a \a title, a \a text, an \a icon, and up to three buttons. The \a icon must be one of the following: \list \li QMessageBox::NoIcon \li QMessageBox::Question \li QMessageBox::Information \li QMessageBox::Warning \li QMessageBox::Critical \endlist Each button, \a button0, \a button1 and \a button2, can have one of the following values: \list \li QMessageBox::NoButton \li QMessageBox::Ok \li QMessageBox::Cancel \li QMessageBox::Yes \li QMessageBox::No \li QMessageBox::Abort \li QMessageBox::Retry \li QMessageBox::Ignore \li QMessageBox::YesAll \li QMessageBox::NoAll \endlist Use QMessageBox::NoButton for the later parameters to have fewer than three buttons in your message box. If you don't specify any buttons at all, QMessageBox will provide an Ok button. One of the buttons can be OR-ed with the QMessageBox::Default flag to make it the default button (clicked when Enter is pressed). One of the buttons can be OR-ed with the QMessageBox::Escape flag to make it the cancel or close button (clicked when \uicontrol Esc is pressed). \snippet dialogs/dialogs.cpp 2 The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. The \a parent and \a f arguments are passed to the QDialog constructor. \sa setWindowTitle(), setText(), setIcon() */ QMessageBox::QMessageBox(const QString &title, const QString &text, Icon icon, int button0, int button1, int button2, QWidget *parent, Qt::WindowFlags f) : QDialog(*new QMessageBoxPrivate, parent, f /*| Qt::MSWindowsFixedSizeDialogHint #### */| Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint) { Q_D(QMessageBox); d->init(title, text); setIcon(icon); d->addOldButtons(button0, button1, button2); } /*! \obsolete Opens an information message box with the given \a title and the \a text. The dialog may have up to three buttons. Each of the buttons, \a button0, \a button1 and \a button2 may be set to one of the following values: \list \li QMessageBox::NoButton \li QMessageBox::Ok \li QMessageBox::Cancel \li QMessageBox::Yes \li QMessageBox::No \li QMessageBox::Abort \li QMessageBox::Retry \li QMessageBox::Ignore \li QMessageBox::YesAll \li QMessageBox::NoAll \endlist If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton. One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape. Returns the identity (QMessageBox::Ok, or QMessageBox::No, etc.) of the button that was clicked. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa question(), warning(), critical() */ int QMessageBox::information(QWidget *parent, const QString &title, const QString& text, int button0, int button1, int button2) { return QMessageBoxPrivate::showOldMessageBox(parent, Information, title, text, button0, button1, button2); } /*! \obsolete \overload Displays an information message box with the given \a title and \a text, as well as one, two or three buttons. Returns the index of the button that was clicked (0, 1 or 2). \a button0Text is the text of the first button, and is optional. If \a button0Text is not supplied, "OK" (translated) will be used. \a button1Text is the text of the second button, and is optional. \a button2Text is the text of the third button, and is optional. \a defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). \a escapeButtonNumber is the index of the escape button; pressing \uicontrol Esc is the same as clicking this button. It defaults to -1; supply 0, 1 or 2 to make pressing \uicontrol Esc equivalent to clicking the relevant button. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa question(), warning(), critical() */ int QMessageBox::information(QWidget *parent, const QString &title, const QString& text, const QString& button0Text, const QString& button1Text, const QString& button2Text, int defaultButtonNumber, int escapeButtonNumber) { return QMessageBoxPrivate::showOldMessageBox(parent, Information, title, text, button0Text, button1Text, button2Text, defaultButtonNumber, escapeButtonNumber); } /*! \obsolete Opens a question message box with the given \a title and \a text. The dialog may have up to three buttons. Each of the buttons, \a button0, \a button1 and \a button2 may be set to one of the following values: \list \li QMessageBox::NoButton \li QMessageBox::Ok \li QMessageBox::Cancel \li QMessageBox::Yes \li QMessageBox::No \li QMessageBox::Abort \li QMessageBox::Retry \li QMessageBox::Ignore \li QMessageBox::YesAll \li QMessageBox::NoAll \endlist If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton. One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape. Returns the identity (QMessageBox::Yes, or QMessageBox::No, etc.) of the button that was clicked. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa information(), warning(), critical() */ int QMessageBox::question(QWidget *parent, const QString &title, const QString& text, int button0, int button1, int button2) { return QMessageBoxPrivate::showOldMessageBox(parent, Question, title, text, button0, button1, button2); } /*! \obsolete \overload Displays a question message box with the given \a title and \a text, as well as one, two or three buttons. Returns the index of the button that was clicked (0, 1 or 2). \a button0Text is the text of the first button, and is optional. If \a button0Text is not supplied, "OK" (translated) will be used. \a button1Text is the text of the second button, and is optional. \a button2Text is the text of the third button, and is optional. \a defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). \a escapeButtonNumber is the index of the Escape button; pressing Escape is the same as clicking this button. It defaults to -1; supply 0, 1 or 2 to make pressing Escape equivalent to clicking the relevant button. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa information(), warning(), critical() */ int QMessageBox::question(QWidget *parent, const QString &title, const QString& text, const QString& button0Text, const QString& button1Text, const QString& button2Text, int defaultButtonNumber, int escapeButtonNumber) { return QMessageBoxPrivate::showOldMessageBox(parent, Question, title, text, button0Text, button1Text, button2Text, defaultButtonNumber, escapeButtonNumber); } /*! \obsolete Opens a warning message box with the given \a title and \a text. The dialog may have up to three buttons. Each of the button parameters, \a button0, \a button1 and \a button2 may be set to one of the following values: \list \li QMessageBox::NoButton \li QMessageBox::Ok \li QMessageBox::Cancel \li QMessageBox::Yes \li QMessageBox::No \li QMessageBox::Abort \li QMessageBox::Retry \li QMessageBox::Ignore \li QMessageBox::YesAll \li QMessageBox::NoAll \endlist If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton. One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape. Returns the identity (QMessageBox::Ok or QMessageBox::No or ...) of the button that was clicked. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa information(), question(), critical() */ int QMessageBox::warning(QWidget *parent, const QString &title, const QString& text, int button0, int button1, int button2) { return QMessageBoxPrivate::showOldMessageBox(parent, Warning, title, text, button0, button1, button2); } /*! \obsolete \overload Displays a warning message box with the given \a title and \a text, as well as one, two, or three buttons. Returns the number of the button that was clicked (0, 1, or 2). \a button0Text is the text of the first button, and is optional. If \a button0Text is not supplied, "OK" (translated) will be used. \a button1Text is the text of the second button, and is optional, and \a button2Text is the text of the third button, and is optional. \a defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). \a escapeButtonNumber is the index of the Escape button; pressing Escape is the same as clicking this button. It defaults to -1; supply 0, 1, or 2 to make pressing Escape equivalent to clicking the relevant button. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa information(), question(), critical() */ int QMessageBox::warning(QWidget *parent, const QString &title, const QString& text, const QString& button0Text, const QString& button1Text, const QString& button2Text, int defaultButtonNumber, int escapeButtonNumber) { return QMessageBoxPrivate::showOldMessageBox(parent, Warning, title, text, button0Text, button1Text, button2Text, defaultButtonNumber, escapeButtonNumber); } /*! \obsolete Opens a critical message box with the given \a title and \a text. The dialog may have up to three buttons. Each of the button parameters, \a button0, \a button1 and \a button2 may be set to one of the following values: \list \li QMessageBox::NoButton \li QMessageBox::Ok \li QMessageBox::Cancel \li QMessageBox::Yes \li QMessageBox::No \li QMessageBox::Abort \li QMessageBox::Retry \li QMessageBox::Ignore \li QMessageBox::YesAll \li QMessageBox::NoAll \endlist If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton. One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape. Returns the identity (QMessageBox::Ok, or QMessageBox::No, etc.) of the button that was clicked. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa information(), question(), warning() */ int QMessageBox::critical(QWidget *parent, const QString &title, const QString& text, int button0, int button1, int button2) { return QMessageBoxPrivate::showOldMessageBox(parent, Critical, title, text, button0, button1, button2); } /*! \obsolete \overload Displays a critical error message box with the given \a title and \a text, as well as one, two, or three buttons. Returns the number of the button that was clicked (0, 1 or 2). \a button0Text is the text of the first button, and is optional. If \a button0Text is not supplied, "OK" (translated) will be used. \a button1Text is the text of the second button, and is optional, and \a button2Text is the text of the third button, and is optional. \a defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). \a escapeButtonNumber is the index of the Escape button; pressing Escape is the same as clicking this button. It defaults to -1; supply 0, 1, or 2 to make pressing Escape equivalent to clicking the relevant button. The message box is an \l{Qt::ApplicationModal} {application modal} dialog box. \warning Do not delete \a parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors. \sa information(), question(), warning() */ int QMessageBox::critical(QWidget *parent, const QString &title, const QString& text, const QString& button0Text, const QString& button1Text, const QString& button2Text, int defaultButtonNumber, int escapeButtonNumber) { return QMessageBoxPrivate::showOldMessageBox(parent, Critical, title, text, button0Text, button1Text, button2Text, defaultButtonNumber, escapeButtonNumber); } /*! \obsolete Returns the text of the message box button \a button, or an empty string if the message box does not contain the button. Use button() and QPushButton::text() instead. */ QString QMessageBox::buttonText(int button) const { Q_D(const QMessageBox); if (QAbstractButton *abstractButton = d->abstractButtonForId(button)) { return abstractButton->text(); } else if (d->buttonBox->buttons().isEmpty() && (button == Ok || button == Old_Ok)) { // for compatibility with Qt 4.0/4.1 return QDialogButtonBox::tr("OK"); } return QString(); } /*! \obsolete Sets the text of the message box button \a button to \a text. Setting the text of a button that is not in the message box is silently ignored. Use addButton() instead. */ void QMessageBox::setButtonText(int button, const QString &text) { Q_D(QMessageBox); if (QAbstractButton *abstractButton = d->abstractButtonForId(button)) { abstractButton->setText(text); } else if (d->buttonBox->buttons().isEmpty() && (button == Ok || button == Old_Ok)) { // for compatibility with Qt 4.0/4.1 addButton(QMessageBox::Ok)->setText(text); } } #if QT_CONFIG(textedit) /*! \property QMessageBox::detailedText \brief the text to be displayed in the details area. \since 4.2 The text will be interpreted as a plain text. By default, this property contains an empty string. \sa QMessageBox::text, QMessageBox::informativeText */ QString QMessageBox::detailedText() const { Q_D(const QMessageBox); return d->detailsText ? d->detailsText->text() : QString(); } void QMessageBox::setDetailedText(const QString &text) { Q_D(QMessageBox); if (text.isEmpty()) { if (d->detailsText) { d->detailsText->hide(); d->detailsText->deleteLater(); } d->detailsText = 0; removeButton(d->detailsButton); if (d->detailsButton) { d->detailsButton->hide(); d->detailsButton->deleteLater(); } d->detailsButton = 0; } else { if (!d->detailsText) { d->detailsText = new QMessageBoxDetailsText(this); d->detailsText->hide(); } if (!d->detailsButton) { const bool autoAddOkButton = d->autoAddOkButton; // QTBUG-39334, addButton() clears the flag. d->detailsButton = new DetailButton(this); addButton(d->detailsButton, QMessageBox::ActionRole); d->autoAddOkButton = autoAddOkButton; } d->detailsText->setText(text); } d->setupLayout(); } #endif // QT_CONFIG(textedit) /*! \property QMessageBox::informativeText \brief the informative text that provides a fuller description for the message \since 4.2 Infromative text can be used to expand upon the text() to give more information to the user. On the Mac, this text appears in small system font below the text(). On other platforms, it is simply appended to the existing text. By default, this property contains an empty string. \sa QMessageBox::text, QMessageBox::detailedText */ QString QMessageBox::informativeText() const { Q_D(const QMessageBox); return d->informativeLabel ? d->informativeLabel->text() : QString(); } void QMessageBox::setInformativeText(const QString &text) { Q_D(QMessageBox); if (text.isEmpty()) { if (d->informativeLabel) { d->informativeLabel->hide(); d->informativeLabel->deleteLater(); } d->informativeLabel = 0; } else { if (!d->informativeLabel) { QLabel *label = new QLabel; label->setObjectName(QLatin1String("qt_msgbox_informativelabel")); label->setTextInteractionFlags(Qt::TextInteractionFlags(style()->styleHint(QStyle::SH_MessageBox_TextInteractionFlags, 0, this))); label->setAlignment(Qt::AlignTop | Qt::AlignLeft); label->setOpenExternalLinks(true); label->setWordWrap(true); #ifdef Q_OS_MAC // apply a smaller font the information label on the mac label->setFont(qt_app_fonts_hash()->value("QTipLabel")); #endif label->setWordWrap(true); d->informativeLabel = label; } d->informativeLabel->setText(text); } d->setupLayout(); } /*! \since 4.2 This function shadows QWidget::setWindowTitle(). Sets the title of the message box to \a title. On \macos, the window title is ignored (as required by the \macos Guidelines). */ void QMessageBox::setWindowTitle(const QString &title) { // Message boxes on the mac do not have a title #ifndef Q_OS_MAC QDialog::setWindowTitle(title); #else Q_UNUSED(title); #endif } /*! \since 4.2 This function shadows QWidget::setWindowModality(). Sets the modality of the message box to \a windowModality. On \macos, if the modality is set to Qt::WindowModal and the message box has a parent, then the message box will be a Qt::Sheet, otherwise the message box will be a standard dialog. */ void QMessageBox::setWindowModality(Qt::WindowModality windowModality) { QDialog::setWindowModality(windowModality); if (parentWidget() && windowModality == Qt::WindowModal) setParent(parentWidget(), Qt::Sheet); else setParent(parentWidget(), Qt::Dialog); setDefaultButton(d_func()->defaultButton); } QPixmap QMessageBoxPrivate::standardIcon(QMessageBox::Icon icon, QMessageBox *mb) { QStyle *style = mb ? mb->style() : QApplication::style(); int iconSize = style->pixelMetric(QStyle::PM_MessageBoxIconSize, 0, mb); QIcon tmpIcon; switch (icon) { case QMessageBox::Information: tmpIcon = style->standardIcon(QStyle::SP_MessageBoxInformation, 0, mb); break; case QMessageBox::Warning: tmpIcon = style->standardIcon(QStyle::SP_MessageBoxWarning, 0, mb); break; case QMessageBox::Critical: tmpIcon = style->standardIcon(QStyle::SP_MessageBoxCritical, 0, mb); break; case QMessageBox::Question: tmpIcon = style->standardIcon(QStyle::SP_MessageBoxQuestion, 0, mb); default: break; } if (!tmpIcon.isNull()) { QWindow *window = Q_NULLPTR; if (mb) { window = mb->windowHandle(); if (!window) { if (const QWidget *nativeParent = mb->nativeParentWidget()) window = nativeParent->windowHandle(); } } return tmpIcon.pixmap(window, QSize(iconSize, iconSize)); } return QPixmap(); } void QMessageBoxPrivate::initHelper(QPlatformDialogHelper *h) { Q_Q(QMessageBox); QObject::connect(h, SIGNAL(clicked(QPlatformDialogHelper::StandardButton,QPlatformDialogHelper::ButtonRole)), q, SLOT(_q_clicked(QPlatformDialogHelper::StandardButton,QPlatformDialogHelper::ButtonRole))); static_cast(h)->setOptions(options); } static QMessageDialogOptions::Icon helperIcon(QMessageBox::Icon i) { switch (i) { case QMessageBox::NoIcon: return QMessageDialogOptions::NoIcon; case QMessageBox::Information: return QMessageDialogOptions::Information; case QMessageBox::Warning: return QMessageDialogOptions::Warning; case QMessageBox::Critical: return QMessageDialogOptions::Critical; case QMessageBox::Question: return QMessageDialogOptions::Question; } return QMessageDialogOptions::NoIcon; } static QPlatformDialogHelper::StandardButtons helperStandardButtons(QMessageBox * q) { QPlatformDialogHelper::StandardButtons buttons(int(q->standardButtons())); return buttons; } void QMessageBoxPrivate::helperPrepareShow(QPlatformDialogHelper *) { Q_Q(QMessageBox); options->setWindowTitle(q->windowTitle()); options->setText(q->text()); options->setInformativeText(q->informativeText()); #if QT_CONFIG(textedit) options->setDetailedText(q->detailedText()); #endif options->setIcon(helperIcon(q->icon())); options->setStandardButtons(helperStandardButtons(q)); } void QMessageBoxPrivate::helperDone(QDialog::DialogCode code, QPlatformDialogHelper *) { Q_Q(QMessageBox); clickedButton = q->button(QMessageBox::StandardButton(code)); } /*! \obsolete Returns the pixmap used for a standard icon. This allows the pixmaps to be used in more complex message boxes. \a icon specifies the required icon, e.g. QMessageBox::Question, QMessageBox::Information, QMessageBox::Warning or QMessageBox::Critical. Call QStyle::standardIcon() with QStyle::SP_MessageBoxInformation etc. instead. */ QPixmap QMessageBox::standardIcon(Icon icon) { return QMessageBoxPrivate::standardIcon(icon, 0); } /*! \typedef QMessageBox::Button \obsolete Use QMessageBox::StandardButton instead. */ /*! \fn int QMessageBox::information(QWidget *parent, const QString &title, const QString& text, StandardButton button0, StandardButton button1) \fn int QMessageBox::warning(QWidget *parent, const QString &title, const QString& text, StandardButton button0, StandardButton button1) \fn int QMessageBox::critical(QWidget *parent, const QString &title, const QString& text, StandardButton button0, StandardButton button1) \fn int QMessageBox::question(QWidget *parent, const QString &title, const QString& text, StandardButton button0, StandardButton button1) \internal ### Needed for Qt 4 source compatibility */ /*! \fn int QMessageBox::exec() Shows the message box as a \l{QDialog#Modal Dialogs}{modal dialog}, blocking until the user closes it. When using a QMessageBox with standard buttons, this functions returns a \l StandardButton value indicating the standard button that was clicked. When using QMessageBox with custom buttons, this function returns an opaque value; use clickedButton() to determine which button was clicked. \note The result() function returns also \l StandardButton value instead of \l QDialog::DialogCode. Users cannot interact with any other window in the same application until they close the dialog, either by clicking a button or by using a mechanism provided by the window system. \sa show(), result() */ QT_END_NAMESPACE #include "moc_qmessagebox.cpp" #include "qmessagebox.moc"