qquickdialog.cpp

Go to the documentation of this file.

// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Qt-Security score:significant reason:default
 
#include "qquickdialog_p.h"
#include "qquickdialog_p_p.h"
#include "qquickdialogbuttonbox_p.h"
#include "qquickdialogbuttonbox_p_p.h"
#include "qquickabstractbutton_p.h"
#include "qquickpopupitem_p_p.h"
#include "qquickpopupwindow_p_p.h"
#include <qpa/qplatformintegration.h>
#include <private/qguiapplication_p.h>
 
QT_BEGIN_NAMESPACE
 
/*!
    \qmltype Dialog
    \inherits Popup
//!     \nativetype QQuickDialog
    \inqmlmodule QtQuick.Controls
    \ingroup qtquickcontrols-dialogs
    \ingroup qtquickcontrols-popups
    \brief Popup dialog with standard buttons and a title, used for short-term interaction with the user.
    \since 5.8
 
    A dialog is a popup mostly used for short-term tasks and brief communications
    with the user. Similarly to \l ApplicationWindow and \l Page, Dialog is organized
    into three sections: \l header, \l {Popup::}{contentItem}, and \l footer.
 
    \image qtquickcontrols-page-wireframe.webp
           {Page wireframe with header, content area, and footer}
 
    The \l {Popup::}{padding} properties only affect the contentItem. Use the
    \l {Popup::}{spacing} property to affect the space between header,
    contentItem and footer.
 
    By default, Dialogs have \l {QQuickItem::}{focus}.
 
    \section1 Dialog Title and Buttons
 
    Dialog's \l title is displayed by a style-specific title bar that is assigned
    as a dialog \l header by default.
 
    Dialog's standard buttons are managed by a \l DialogButtonBox that is assigned
    as a dialog \l footer by default. The dialog's \l standardButtons property is
    forwarded to the respective property of the button box. Furthermore, the
    \l {DialogButtonBox::}{accepted()} and \l {DialogButtonBox::}{rejected()}
    signals of the button box are connected to the respective signals in Dialog.
 
    \snippet qtquickcontrols-dialog.qml 1
 
    \section1 Modal Dialogs
 
    A \l {Popup::}{modal} dialog blocks input to other content beneath
    the dialog. When a modal dialog is opened, the user must finish
    interacting with the dialog and close it before they can access any
    other content in the same window.
 
    \snippet qtquickcontrols-dialog-modal.qml 1
 
    \section1 Modeless Dialogs
 
    A modeless dialog is a dialog that operates independently of other
    content around the dialog. When a modeless dialog is opened, the user
    is allowed to interact with both the dialog and the other content in
    the same window.
 
    \snippet qtquickcontrols-dialog-modeless.qml 1
 
    \sa DialogButtonBox, {Popup Controls}
*/
 
/*!
    \qmlsignal QtQuick.Controls::Dialog::accepted()
 
    This signal is emitted when the dialog has been accepted either
    interactively or by calling \l accept().
 
    \note This signal is \e not emitted when closing the dialog with
    \l {Popup::}{close()} or setting \l {Popup::}{visible} to \c false.
 
    \sa rejected()
*/
 
/*!
    \qmlsignal QtQuick.Controls::Dialog::rejected()
 
    This signal is emitted when the dialog has been rejected either
    interactively or by calling \l reject().
 
    \note This signal is \e not emitted when closing the dialog with
    \l {Popup::}{close()} or setting \l {Popup::}{visible} to \c false.
 
    \sa accepted()
*/
 
/*!
    \since QtQuick.Controls 2.3 (Qt 5.10)
    \qmlsignal QtQuick.Controls::Dialog::applied()
 
    This signal is emitted when the \c Dialog.Apply standard button is clicked.
 
    \sa discarded(), reset()
*/
 
/*!
    \since QtQuick.Controls 2.3 (Qt 5.10)
    \qmlsignal QtQuick.Controls::Dialog::reset()
 
    This signal is emitted when the \c Dialog.Reset standard button is clicked.
 
    \sa discarded(), applied()
*/
 
/*!
    \since QtQuick.Controls 2.3 (Qt 5.10)
    \qmlsignal QtQuick.Controls::Dialog::discarded()
 
    This signal is emitted when the \c Dialog.Discard standard button is clicked.
 
    \sa reset(), applied()
*/
 
/*!
    \since QtQuick.Controls 2.3 (Qt 5.10)
    \qmlsignal QtQuick.Controls::Dialog::helpRequested()
 
    This signal is emitted when the \c Dialog.Help standard button is clicked.
 
    \sa accepted(), rejected()
*/
 
QPlatformDialogHelper::ButtonRole QQuickDialogPrivate::buttonRole(QQuickAbstractButton *button)
{
    const QQuickDialogButtonBoxAttached *attached = qobject_cast<QQuickDialogButtonBoxAttached *>(qmlAttachedPropertiesObject<QQuickDialogButtonBox>(button, false));
    return attached ? attached->buttonRole() : QPlatformDialogHelper::InvalidRole;
}
 
void QQuickDialogPrivate::handleAccept()
{
    Q_Q(QQuickDialog);
    q->accept();
}
 
void QQuickDialogPrivate::handleReject()
{
    Q_Q(QQuickDialog);
    q->reject();
}
 
void QQuickDialogPrivate::handleClick(QQuickAbstractButton *button)
{
    Q_Q(QQuickDialog);
    switch (buttonRole(button)) {
    case QPlatformDialogHelper::ApplyRole:
        emit q->applied();
        break;
    case QPlatformDialogHelper::ResetRole:
        emit q->reset();
        break;
    case QPlatformDialogHelper::DestructiveRole:
        emit q->discarded();
        q->close();
        break;
    case QPlatformDialogHelper::HelpRole:
        emit q->helpRequested();
        break;
    default:
        break;
    }
}
 
QQuickDialog::QQuickDialog(QObject *parent)
    : QQuickDialog(*(new QQuickDialogPrivate), parent)
{
}
 
QQuickDialog::QQuickDialog(QQuickDialogPrivate &dd, QObject *parent)
    : QQuickPopup(dd, parent)
{
    Q_D(QQuickDialog);
 
    // Dialogs should get active focus when opened so that e.g. Cancel closes them.
    setFocus(true);
    QObject::connect(d->popupItem, &QQuickPopupItem::headerChanged, this, &QQuickDialog::headerChanged);
    QObject::connect(d->popupItem, &QQuickPopupItem::footerChanged, this, &QQuickDialog::footerChanged);
    QObject::connect(d->popupItem, &QQuickPopupItem::implicitHeaderWidthChanged, this, &QQuickDialog::implicitHeaderWidthChanged);
    QObject::connect(d->popupItem, &QQuickPopupItem::implicitHeaderHeightChanged, this, &QQuickDialog::implicitHeaderHeightChanged);
    QObject::connect(d->popupItem, &QQuickPopupItem::implicitFooterWidthChanged, this, &QQuickDialog::implicitFooterWidthChanged);
    QObject::connect(d->popupItem, &QQuickPopupItem::implicitFooterHeightChanged, this, &QQuickDialog::implicitFooterHeightChanged);
}
 
QQuickDialog::~QQuickDialog()
{
    Q_D(QQuickDialog);
    QObject::disconnect(d->popupItem, &QQuickPopupItem::headerChanged, this, &QQuickDialog::headerChanged);
    QObject::disconnect(d->popupItem, &QQuickPopupItem::footerChanged, this, &QQuickDialog::footerChanged);
    QObject::disconnect(d->popupItem, &QQuickPopupItem::implicitHeaderWidthChanged, this, &QQuickDialog::implicitHeaderWidthChanged);
    QObject::disconnect(d->popupItem, &QQuickPopupItem::implicitHeaderHeightChanged, this, &QQuickDialog::implicitHeaderHeightChanged);
    QObject::disconnect(d->popupItem, &QQuickPopupItem::implicitFooterWidthChanged, this, &QQuickDialog::implicitFooterWidthChanged);
    QObject::disconnect(d->popupItem, &QQuickPopupItem::implicitFooterHeightChanged, this, &QQuickDialog::implicitFooterHeightChanged);
}
 
/*!
    \qmlproperty string QtQuick.Controls::Dialog::title
 
    This property holds the dialog title.
 
    The title is displayed in the dialog header.
 
    \code
    Dialog {
        title: qsTr("About")
 
        Label {
            text: "Lorem ipsum..."
        }
    }
    \endcode
*/
QString QQuickDialog::title() const
{
    Q_D(const QQuickDialog);
    return d->title;
}
 
void QQuickDialog::setTitle(const QString &title)
{
    Q_D(QQuickDialog);
    if (d->title == title)
        return;
    d->title = title;
 
    if (d->popupWindow)
        d->popupWindow->setTitle(title);
    else
        d->popupItem->setTitle(title);
 
    emit titleChanged();
}
 
/*!
    \qmlproperty Item QtQuick.Controls::Dialog::header
 
    This property holds the dialog header item. The header item is positioned to
    the top, and resized to the width of the dialog. The default value is \c null.
 
    \note Assigning a \l DialogButtonBox as a dialog header automatically connects
    its \l {DialogButtonBox::}{accepted()} and \l {DialogButtonBox::}{rejected()}
    signals to the respective signals in Dialog.
 
    \note Assigning a \l DialogButtonBox, \l ToolBar, or \l TabBar as a dialog
    header automatically sets the respective \l DialogButtonBox::position,
    \l ToolBar::position, or \l TabBar::position property to \c Header.
 
    \sa footer
*/
QQuickItem *QQuickDialog::header() const
{
    Q_D(const QQuickDialog);
    return d->popupItem->header();
}
 
void QQuickDialog::setHeader(QQuickItem *header)
{
    Q_D(QQuickDialog);
    QQuickItem *oldHeader = d->popupItem->header();
    if (oldHeader == header)
        return;
 
    QQuickControlPrivate::warnIfCustomizationNotSupported(this, header, QStringLiteral("header"));
 
    if (QQuickDialogButtonBox *buttonBox = qobject_cast<QQuickDialogButtonBox *>(oldHeader)) {
        QObjectPrivate::disconnect(buttonBox, &QQuickDialogButtonBox::accepted, d, &QQuickDialogPrivate::handleAccept);
        QObjectPrivate::disconnect(buttonBox, &QQuickDialogButtonBox::rejected, d, &QQuickDialogPrivate::handleReject);
        QObjectPrivate::disconnect(buttonBox, &QQuickDialogButtonBox::clicked, d, &QQuickDialogPrivate::handleClick);
        if (d->buttonBox == buttonBox)
            d->buttonBox = nullptr;
    }
 
    if (QQuickDialogButtonBox *buttonBox = qobject_cast<QQuickDialogButtonBox *>(header)) {
        QObjectPrivate::connect(buttonBox, &QQuickDialogButtonBox::accepted, d, &QQuickDialogPrivate::handleAccept);
        QObjectPrivate::connect(buttonBox, &QQuickDialogButtonBox::rejected, d, &QQuickDialogPrivate::handleReject);
        QObjectPrivate::connect(buttonBox, &QQuickDialogButtonBox::clicked, d, &QQuickDialogPrivate::handleClick);
        d->buttonBox = buttonBox;
        buttonBox->setStandardButtons(d->standardButtons);
    }
 
    d->popupItem->setHeader(header);
}
 
/*!
    \qmlproperty Item QtQuick.Controls::Dialog::footer
 
    This property holds the dialog footer item. The footer item is positioned to
    the bottom, and resized to the width of the dialog. The default value is \c null.
 
    \note Assigning a \l DialogButtonBox as a dialog footer automatically connects
    its \l {DialogButtonBox::}{accepted()} and \l {DialogButtonBox::}{rejected()}
    signals to the respective signals in Dialog.
 
    \note Assigning a \l DialogButtonBox, \l ToolBar, or \l TabBar as a dialog
    footer automatically sets the respective \l DialogButtonBox::position,
    \l ToolBar::position, or \l TabBar::position property to \c Footer.
 
    \sa header
*/
QQuickItem *QQuickDialog::footer() const
{
    Q_D(const QQuickDialog);
    return d->popupItem->footer();
}
 
void QQuickDialog::setFooter(QQuickItem *footer)
{
    Q_D(QQuickDialog);
    QQuickItem *oldFooter = d->popupItem->footer();
    if (oldFooter == footer)
        return;
 
    QQuickControlPrivate::warnIfCustomizationNotSupported(this, footer, QStringLiteral("footer"));
 
    if (QQuickDialogButtonBox *buttonBox = qobject_cast<QQuickDialogButtonBox *>(oldFooter)) {
        QObjectPrivate::disconnect(buttonBox, &QQuickDialogButtonBox::accepted, d, &QQuickDialogPrivate::handleAccept);
        QObjectPrivate::disconnect(buttonBox, &QQuickDialogButtonBox::rejected, d, &QQuickDialogPrivate::handleReject);
        QObjectPrivate::disconnect(buttonBox, &QQuickDialogButtonBox::clicked, d, &QQuickDialogPrivate::handleClick);
        if (d->buttonBox == buttonBox)
            d->buttonBox = nullptr;
    }
    if (QQuickDialogButtonBox *buttonBox = qobject_cast<QQuickDialogButtonBox *>(footer)) {
        QObjectPrivate::connect(buttonBox, &QQuickDialogButtonBox::accepted, d, &QQuickDialogPrivate::handleAccept);
        QObjectPrivate::connect(buttonBox, &QQuickDialogButtonBox::rejected, d, &QQuickDialogPrivate::handleReject);
        QObjectPrivate::connect(buttonBox, &QQuickDialogButtonBox::clicked, d, &QQuickDialogPrivate::handleClick);
        d->buttonBox = buttonBox;
        buttonBox->setStandardButtons(d->standardButtons);
    }
 
    d->popupItem->setFooter(footer);
}
 
/*!
    \qmlproperty enumeration QtQuick.Controls::Dialog::standardButtons
 
    This property holds a combination of standard buttons that are used by the dialog.
 
    \snippet qtquickcontrols-dialog.qml 1
 
    The buttons will be positioned in the appropriate order for the user's platform.
 
    Possible flags:
    \value Dialog.Ok An "OK" button defined with the \c AcceptRole.
    \value Dialog.Open An "Open" button defined with the \c AcceptRole.
    \value Dialog.Save A "Save" button defined with the \c AcceptRole.
    \value Dialog.Cancel A "Cancel" button defined with the \c RejectRole.
    \value Dialog.Close A "Close" button defined with the \c RejectRole.
    \value Dialog.Discard A "Discard" or "Don't Save" button, depending on the platform, defined with the \c DestructiveRole.
    \value Dialog.Apply An "Apply" button defined with the \c ApplyRole.
    \value Dialog.Reset A "Reset" button defined with the \c ResetRole.
    \value Dialog.RestoreDefaults A "Restore Defaults" button defined with the \c ResetRole.
    \value Dialog.Help A "Help" button defined with the \c HelpRole.
    \value Dialog.SaveAll A "Save All" button defined with the \c AcceptRole.
    \value Dialog.Yes A "Yes" button defined with the \c YesRole.
    \value Dialog.YesToAll A "Yes to All" button defined with the \c YesRole.
    \value Dialog.No A "No" button defined with the \c NoRole.
    \value Dialog.NoToAll A "No to All" button defined with the \c NoRole.
    \value Dialog.Abort An "Abort" button defined with the \c RejectRole.
    \value Dialog.Retry A "Retry" button defined with the \c AcceptRole.
    \value Dialog.Ignore An "Ignore" button defined with the \c AcceptRole.
    \value Dialog.NoButton An invalid button.
 
    \sa DialogButtonBox
*/
QPlatformDialogHelper::StandardButtons QQuickDialog::standardButtons() const
{
    Q_D(const QQuickDialog);
    return d->standardButtons;
}
 
void QQuickDialog::setStandardButtons(QPlatformDialogHelper::StandardButtons buttons)
{
    Q_D(QQuickDialog);
    if (d->standardButtons == buttons)
        return;
 
    d->standardButtons = buttons;
    if (d->buttonBox)
        d->buttonBox->setStandardButtons(buttons);
    emit standardButtonsChanged();
}
 
/*!
    \since QtQuick.Controls 2.3 (Qt 5.10)
    \qmlmethod AbstractButton QtQuick.Controls::Dialog::standardButton(StandardButton button)
 
    Returns the specified standard \a button, or \c null if it does not exist.
 
    \sa standardButtons
*/
QQuickAbstractButton *QQuickDialog::standardButton(QPlatformDialogHelper::StandardButton button) const
{
    Q_D(const QQuickDialog);
    if (!d->buttonBox)
        return nullptr;
    return d->buttonBox->standardButton(button);
}
 
/*!
    \since QtQuick.Controls 2.3 (Qt 5.10)
    \qmlproperty int QtQuick.Controls::Dialog::result
 
    This property holds the result code.
 
    Standard result codes:
    \value Dialog.Accepted The dialog was accepted.
    \value Dialog.Rejected The dialog was rejected.
 
    \sa accept(), reject(), done()
*/
int QQuickDialog::result() const
{
    Q_D(const QQuickDialog);
    return d->result;
}
 
void QQuickDialog::setResult(int result)
{
    Q_D(QQuickDialog);
    if (d->result == result)
        return;
 
    d->result = result;
    emit resultChanged();
}
 
/*!
    \since QtQuick.Controls 2.5 (Qt 5.12)
    \qmlproperty real QtQuick.Controls::Dialog::implicitHeaderWidth
    \readonly
 
    This property holds the implicit header width.
 
    The value is equal to \c {header && header.visible ? header.implicitWidth : 0}.
 
    \sa implicitHeaderHeight, implicitFooterWidth
*/
qreal QQuickDialog::implicitHeaderWidth() const
{
    Q_D(const QQuickDialog);
    return d->popupItem->implicitHeaderWidth();
}
 
/*!
    \since QtQuick.Controls 2.5 (Qt 5.12)
    \qmlproperty real QtQuick.Controls::Dialog::implicitHeaderHeight
    \readonly
 
    This property holds the implicit header height.
 
    The value is equal to \c {header && header.visible ? header.implicitHeight : 0}.
 
    \sa implicitHeaderWidth, implicitFooterHeight
*/
qreal QQuickDialog::implicitHeaderHeight() const
{
    Q_D(const QQuickDialog);
    return d->popupItem->implicitHeaderHeight();
}
 
/*!
    \since QtQuick.Controls 2.5 (Qt 5.12)
    \qmlproperty real QtQuick.Controls::Dialog::implicitFooterWidth
    \readonly
 
    This property holds the implicit footer width.
 
    The value is equal to \c {footer && footer.visible ? footer.implicitWidth : 0}.
 
    \sa implicitFooterHeight, implicitHeaderWidth
*/
qreal QQuickDialog::implicitFooterWidth() const
{
    Q_D(const QQuickDialog);
    return d->popupItem->implicitFooterWidth();
}
 
/*!
    \since QtQuick.Controls 2.5 (Qt 5.12)
    \qmlproperty real QtQuick.Controls::Dialog::implicitFooterHeight
    \readonly
 
    This property holds the implicit footer height.
 
    The value is equal to \c {footer && footer.visible ? footer.implicitHeight : 0}.
 
    \sa implicitFooterWidth, implicitHeaderHeight
*/
qreal QQuickDialog::implicitFooterHeight() const
{
    Q_D(const QQuickDialog);
    return d->popupItem->implicitFooterHeight();
}
 
void QQuickDialog::setOpacity(qreal opacity)
{
    Q_D(QQuickDialog);
    QQuickPopup::setOpacity(d->popupWindow ? qreal(!qFuzzyIsNull(opacity)) : opacity);
}
 
/*!
    \qmlmethod void QtQuick.Controls::Dialog::accept()
 
    Emits the \l accepted() signal and closes the dialog.
 
    \sa reject(), done()
*/
void QQuickDialog::accept()
{
    done(Accepted);
}
 
/*!
    \qmlmethod void QtQuick.Controls::Dialog::reject()
 
    Emits the \l rejected() signal and closes the dialog.
 
    \sa accept(), done()
*/
void QQuickDialog::reject()
{
    done(Rejected);
}
 
/*!
    \since QtQuick.Controls 2.3 (Qt 5.10)
    \qmlmethod void QtQuick.Controls::Dialog::done(int result)
 
    \list 1
    \li Sets the \a result.
    \li Emits \l accepted() or \l rejected() depending on
    whether the result is \c Dialog.Accepted or \c Dialog.Rejected,
    respectively.
    \li Emits \l{Popup::}{closed()}.
    \endlist
 
    \sa accept(), reject(), result
*/
void QQuickDialog::done(int result)
{
    setResult(result);
 
    if (result == Accepted)
        emit accepted();
    else if (result == Rejected)
        emit rejected();
 
    close();
}
 
void QQuickDialog::itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData &data)
{
    QQuickPopup::itemChange(change, data);
 
    if (change != QQuickItem::ItemVisibleHasChanged || !isComponentComplete() || !data.boolValue)
        return;
 
    Q_D(QQuickDialog);
    if (d->buttonBox && QQuickItemPrivate::get(d->popupItem)->subFocusItem == nullptr) {
        for (int i = 0; i < d->buttonBox->count(); ++i) {
            QQuickItem *item = qobject_cast<QQuickItem *>(d->buttonBox->itemAt(i));
            if (item && item->isEnabled()) {
                d->buttonBox->setFocus(true, Qt::OtherFocusReason);
                break;
            }
        }
    }
}
 
#if QT_CONFIG(accessibility)
QAccessible::Role QQuickDialog::accessibleRole() const
{
    return QAccessible::Dialog;
}
 
void QQuickDialog::accessibilityActiveChanged(bool active)
{
    Q_D(QQuickDialog);
    QQuickPopup::accessibilityActiveChanged(active);
 
    if (active)
        maybeSetAccessibleName(d->popupItem->title());
}
#endif
 
QT_END_NAMESPACE
 
#include "moc_qquickdialog_p.cpp"