qmessagebox.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

/*!
    Returns the text of the message box button \a button, or
    an empty string if the message box does not contain the button.

    \sa setButtonText()
*/

QString QMessageBox::buttonText(int button) const
{
    Q_D(const QMessageBox);
    int index = d->indexOf(button);
    return index >= 0 && d->pb[index] ? d->pb[index]->text() : QString();
}


/*!
    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.

    \sa buttonText()
*/

void QMessageBox::setButtonText(int button, const QString &text)
{
    Q_D(QMessageBox);
    int index = d->indexOf(button);
    if (index >= 0 && d->pb[index]) {
        d->pb[index]->setText(text);
        QResizeEvent e(size(), size());
        event(&e);
    }
}


/*!
    \internal
    Internal slot to handle button clicks.
*/

void QMessageBoxPrivate::_q_buttonClicked()
{
    Q_Q(QMessageBox);

    int reply = 0;
    const QObject *s = q->sender();
    for (int i = 0; i < numButtons; i++) {
        if (pb[i] == s)
            reply = button[i];
    }
    q->done(reply);
}


/*!\reimp
*/
QSize QMessageBox::sizeHint() const
{
    Q_D(const QMessageBox);
    ensurePolished();
    d->label->adjustSize();
    QSize labelSize(d->label->size());
    QSize maxButtonSizeHint;
    int n  = d->numButtons;
    for (int i = 0; i < n; i++)
        maxButtonSizeHint = maxButtonSizeHint.expandedTo(d->pb[i]->sizeHint());
    int bw = maxButtonSizeHint.width();
    int bh = maxButtonSizeHint.height();
    int border = bh / 2 - style()->pixelMetric(QStyle::PM_ButtonDefaultIndicator);
    if (border <= 0)
        border = 10;
    int btn_spacing = style()->styleHint(QStyle::SH_MessageBox_UseBorderForButtonSpacing)
                      ? border : 7;
#ifndef Q_OS_TEMP
    int buttons = d->numButtons * bw + (n-1) * btn_spacing;
    int h = bh;
#else
    int visibleButtons = 0;
    for (int i = 0; i < d->numButtons; ++i)
        visibleButtons += d->pb[i]->isVisible() ? 1 : 0;
    int buttons = visibleButtons == 0 ? 0 : visibleButtons * bw + (visibleButtons-1) * btn_spacing;
    int h = visibleButtons == 0 ? 0 : bh;
    n = visibleButtons;
#endif
    if (labelSize.height())
        h += labelSize.height() + 3*border;
    else
        h += 2*border;
    int lmargin = 0;
    if (d->iconLabel->pixmap() && d->iconLabel->pixmap()->width())  {
        d->iconLabel->adjustSize();
        lmargin += d->iconLabel->width() + border;
        if (h < d->iconLabel->height() + 3*border + bh && n)
            h = d->iconLabel->height() + 3*border + bh;
    }
    int w = qMax(buttons, labelSize.width() + lmargin) + 2*border;
    QRect screen = QApplication::desktop()->screenGeometry(pos());
    if (w > screen.width())
        w = screen.width();
    return QSize(w,h);
}


/*!\reimp
*/
void QMessageBox::resizeEvent(QResizeEvent *)
{
    Q_D(QMessageBox);
    int i;
    QSize maxButtonSizeHint;
    int n  = d->numButtons;
    for (i = 0; i < n; i++)
        maxButtonSizeHint = maxButtonSizeHint.expandedTo(d->pb[i]->sizeHint());
    int bw = maxButtonSizeHint.width();
    int bh = maxButtonSizeHint.height();
#ifdef Q_OS_TEMP
    int visibleButtons = 0;
    for (i = 0; i < n; ++i)
        visibleButtons += d->pb[i]->isVisible() ? 1 : 0;
    n  = visibleButtons;
    bw = visibleButtons == 0 ? 0 : bw;
    bh = visibleButtons == 0 ? 0 : bh;
#endif
    int border = bh / 2 - style()->pixelMetric(QStyle::PM_ButtonDefaultIndicator);
    if (border <= 0)
        border = 10;
    bool useBorder = style()->styleHint(QStyle::SH_MessageBox_UseBorderForButtonSpacing);
    int btn_spacing = useBorder ? border : 7;
    int lmargin = 0;
    d->iconLabel->adjustSize();
    bool rtl = layoutDirection() == Qt::RightToLeft;
    if (rtl)
        d->iconLabel->move(width() - border - d->iconLabel->width(), border);
    else
        d->iconLabel->move(border, border);
    if (d->iconLabel->pixmap() && d->iconLabel->pixmap()->width())
        lmargin += d->iconLabel->width() + border;
    d->label->setGeometry((rtl ? 0 : lmargin) + border,
                          border,
                          width() - lmargin -2*border,
                          height() - 3*border - bh);
    int extra_space = (width() - bw*n - 2*border - (n-1)*btn_spacing);
    if (n)
        bw = qMin(bw, (width() - 2 *border) / n);
    if (useBorder) {
        for (i=0; i<n; i++)
            d->pb[rtl ? n - i - 1 : i]->setGeometry(border + i*bw + qMax(0,i*btn_spacing + extra_space*(i+1)/(n+1)),
                                                    height() - border - bh, bw, bh);
    } else {
        for (i=0; i<n; i++)
            d->pb[rtl ? n - i - 1 : i]->setGeometry(border + i*bw + qMax(0,extra_space/2 + i*btn_spacing),
                                                    height() - border - bh, bw, bh);
    }
}


/*!\reimp
*/
void QMessageBox::keyPressEvent(QKeyEvent *e)
{
    Q_D(QMessageBox);
    if (e->key() == Qt::Key_Escape) {
        if (d->escButton >= 0) {
            QPushButton *pb = d->pb[d->escButton];
            pb->animateClick();
            e->accept();
            return;
        }
    }
#ifndef QT_NO_SHORTCUT
    if (!(e->modifiers() & Qt::AltModifier)) {
        int key = e->key() & ~((int)Qt::MODIFIER_MASK|(int)Qt::UNICODE_ACCEL);
        if (key) {
            QList<QPushButton *> list = qFindChildren<QPushButton *>(this);
            for (int i = 0; i < list.size(); ++i) {
                QPushButton *pb = list.at(i);
                int acc = pb->shortcut() & ~((int)Qt::MODIFIER_MASK|(int)Qt::UNICODE_ACCEL);
                if (acc == key) {
                    emit pb->animateClick();
                    return;
                }
            }
        }
    }
#endif
    QDialog::keyPressEvent(e);
}

/*!\reimp
*/
void QMessageBox::showEvent(QShowEvent *e)
{
#ifndef QT_NO_ACCESSIBILITY
    QAccessible::updateAccessibility(this, 0, QAccessible::Alert);
#endif
    QDialog::showEvent(e);
}

/*!\reimp
*/
void QMessageBox::closeEvent(QCloseEvent *e)
{
    Q_D(QMessageBox);
    QDialog::closeEvent(e);
    if (d->escButton != -1)
        setResult(d->button[d->escButton]);
}

/*****************************************************************************
  Static QMessageBox functions
 *****************************************************************************/

/*!
    \fn int QMessageBox::message(const QString &caption,
                        const QString& text,
                        const QString& buttonText,
                        QWidget *parent, const char *name)

  \obsolete

  Opens a modal message box with the given \a caption and showing the
  given \a text. The message box has a single button which has the
  given \a buttonText (or tr("OK")). The message box is centred over
  its \a parent and is called \a name.

  Use information(), warning(), question(), or critical() instead.
*/

/*!
    \fn bool QMessageBox::query(const QString &caption,
                       const QString& text,
                       const QString& yesButtonText,
                       const QString& noButtonText,
                       QWidget *parent, const char *name)

  \obsolete

  Queries the user using a modal message box with up to two buttons.
  The message box has the given \a caption (although some window
  managers don't show it), and shows the given \a text. The left
  button has the \a yesButtonText (or tr("OK")), and the right button
  has the \a noButtonText (or isn't shown). The message box is centred
  over its \a parent and is called \a name.

  Use information(), question(), warning(), or critical() instead.
*/

/*!
    Opens an information message box with the caption \a caption and
    the text \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
    \i QMessageBox::NoButton
    \i QMessageBox::Ok
    \i QMessageBox::Cancel
    \i QMessageBox::Yes
    \i QMessageBox::No
    \i QMessageBox::Abort
    \i QMessageBox::Retry
    \i QMessageBox::Ignore
    \i QMessageBox::YesAll
    \i 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.

    If \a parent is 0, the message box becomes an application-global
    modal dialog box. If \a parent is a widget, the message box
    becomes modal relative to \a parent.

    \sa question(), warning(), critical()
*/

int QMessageBox::information(QWidget *parent, const QString& caption, const QString& text,
                             int button0, int button1, int button2)
{
    QMessageBox mb(caption, text, Information, button0, button1, button2, parent);
#ifdef Q_WS_MAC
    mb.setFixedSize(mb.sizeHint());
#endif
    return mb.exec();
}

/*!
    Opens a question message box with the caption \a caption and the
    text \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
    \i QMessageBox::NoButton
    \i QMessageBox::Ok
    \i QMessageBox::Cancel
    \i QMessageBox::Yes
    \i QMessageBox::No
    \i QMessageBox::Abort
    \i QMessageBox::Retry
    \i QMessageBox::Ignore
    \i QMessageBox::YesAll
    \i 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.

    If \a parent is 0, the message box becomes an application-global
    modal dialog box. If \a parent is a widget, the message box
    becomes modal relative to \a parent.

    \sa information(), warning(), critical()
*/

int QMessageBox::question(QWidget *parent,
                           const QString& caption, const QString& text,
                           int button0, int button1, int button2)
{
    QMessageBox mb(caption, text, Question, button0, button1, button2, parent);
#ifdef Q_WS_MAC
    mb.setFixedSize(mb.sizeHint());
#endif
    return mb.exec();
}


/*!
    Opens a warning message box with the caption \a caption and the
    text \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
    \i QMessageBox::NoButton
    \i QMessageBox::Ok
    \i QMessageBox::Cancel
    \i QMessageBox::Yes
    \i QMessageBox::No
    \i QMessageBox::Abort
    \i QMessageBox::Retry
    \i QMessageBox::Ignore
    \i QMessageBox::YesAll
    \i 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.

    If \a parent is 0, the message box becomes an application-global
    modal dialog box. If \a parent is a widget, the message box
    becomes modal relative to \a parent.

    \sa information(), question(), critical()
*/

int QMessageBox::warning(QWidget *parent,
                          const QString& caption, const QString& text,
                          int button0, int button1, int button2)
{
    QMessageBox mb(caption, text, Warning, button0, button1, button2, parent);
#ifdef Q_WS_MAC
    mb.setFixedSize(mb.sizeHint());
#endif
    return mb.exec();
}


/*!
    Opens a critical message box with the caption \a caption and the
    text \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
    \i QMessageBox::NoButton
    \i QMessageBox::Ok
    \i QMessageBox::Cancel
    \i QMessageBox::Yes
    \i QMessageBox::No
    \i QMessageBox::Abort
    \i QMessageBox::Retry
    \i QMessageBox::Ignore
    \i QMessageBox::YesAll
    \i QMessageBox::NoAll
    \endlist