qsystemtrayicon.cpp

奇趣公司比较新的qt/emd版本

    \fn void QSystemTrayIcon::activated(QSystemTrayIcon::ActivationReason reason)

    This signal is emitted when the user activates the system tray icon. \a reason
    specifies the reason for activation. QSystemTrayIcon::ActivationReason enumerates
    the various reasons.

    \sa QSystemTrayIcon::ActivationReason
*/

/*!
    \fn void QSystemTrayIcon::messageClicked()

    This signal is emitted when the message displayed using showMessage()
    was clicked by the user.

    \sa activated()
*/


/*!
    Returns true if the system tray is available; otherwise returns false.

    If the system tray is currently unavailable but becomes available later,
    QSystemTrayIcon will automatically add an entry in the system tray if it
    is \l visible.
*/

bool QSystemTrayIcon::isSystemTrayAvailable()
{
    return QSystemTrayIconPrivate::isSystemTrayAvailable_sys();
}

/*!
    Returns true if the system tray supports balloon messages; otherwise returns false.

    \sa showMessage()
*/
bool QSystemTrayIcon::supportsMessages()
{
#if defined(Q_WS_QWS)
    return false;
#endif
    return true;
}

/*!
    \fn void QSystemTrayIcon::showMessage(const QString &title, const QString &message, MessageIcon icon, int millisecondsTimeoutHint)
    \since 4.3

    Shows a balloon message for the entry with the given \a title, \a message and
    \a icon for the time specified in \a millisecondsTimeoutHint.

    Message can be clicked by the user; the messageClicked() signal will emitted when
    this occurs.

    Note that display of messages are dependent on the system configuration and user
    preferences, and that messages may not appear at all. Hence, it should not be
    relied upon as the sole means for providing critical information.

    On Windows, the \a millisecondsTimeoutHint is usually ignored by the system
    when the application has focus.

    \sa show() supportsMessages()
  */
void QSystemTrayIcon::showMessage(const QString& title, const QString& msg,
                            QSystemTrayIcon::MessageIcon icon, int msecs)
{
    Q_D(QSystemTrayIcon);
    if (d->visible)
        d->showMessage_sys(title, msg, icon, msecs);
}

//////////////////////////////////////////////////////////////////////
static QBalloonTip *theSolitaryBalloonTip = 0;

void QBalloonTip::showBalloon(QSystemTrayIcon::MessageIcon icon, const QString& title,
                              const QString& message, QSystemTrayIcon *trayIcon,
                              const QPoint& pos, int timeout, bool showArrow)
{
    hideBalloon();
    theSolitaryBalloonTip = new QBalloonTip(icon, title, message, trayIcon);
    if (timeout < 0)
        timeout = 10000; //10 s default
    theSolitaryBalloonTip->balloon(pos, timeout, showArrow);
}

void QBalloonTip::hideBalloon()
{
    if (!theSolitaryBalloonTip)
        return;
    theSolitaryBalloonTip->hide();
    delete theSolitaryBalloonTip;
    theSolitaryBalloonTip = 0;
}

QBalloonTip::QBalloonTip(QSystemTrayIcon::MessageIcon icon, const QString& title,
                         const QString& message, QSystemTrayIcon *ti)
    : QWidget(0, Qt::ToolTip), trayIcon(ti), timerId(-1)
{
    setAttribute(Qt::WA_DeleteOnClose);
    QObject::connect(ti, SIGNAL(destroyed()), this, SLOT(close()));

    QLabel *titleLabel = new QLabel;
    titleLabel->installEventFilter(this);
    titleLabel->setText(title);
    QFont f = titleLabel->font();
    f.setBold(true);
    titleLabel->setFont(f);
    titleLabel->setTextFormat(Qt::PlainText); // to maintain compat with windows

    QPushButton *closeButton = new QPushButton;
    closeButton->setIcon(style()->standardIcon(QStyle::SP_DockWidgetCloseButton));
    closeButton->setIconSize(QSize(18, 18));
    closeButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
    closeButton->setFixedSize(18, 18);
    QObject::connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));

    QLabel *msgLabel = new QLabel;
    msgLabel->installEventFilter(this);
    msgLabel->setText(message);
    msgLabel->setTextFormat(Qt::PlainText);
    msgLabel->setAlignment(Qt::AlignTop | Qt::AlignLeft);

    // smart size for the message label
    int limit = QApplication::desktop()->availableGeometry(msgLabel).size().width() / 3;
    if (msgLabel->sizeHint().width() > limit) {
        msgLabel->setWordWrap(true);
        if (msgLabel->sizeHint().width() > limit) {
            msgLabel->d_func()->ensureTextControl();
            if (QTextControl *control = msgLabel->d_func()->control) {
                QTextOption opt = control->document()->defaultTextOption();
                opt.setWrapMode(QTextOption::WrapAnywhere);
                control->document()->setDefaultTextOption(opt);
            }
        }
        msgLabel->setFixedSize(limit, msgLabel->heightForWidth(limit));
    }

    QIcon si;
    switch (icon) {
    case QSystemTrayIcon::Warning:
        si = style()->standardIcon(QStyle::SP_MessageBoxWarning);
        break;
    case QSystemTrayIcon::Critical:
	si = style()->standardIcon(QStyle::SP_MessageBoxCritical);
        break;
    case QSystemTrayIcon::Information:
	si = style()->standardIcon(QStyle::SP_MessageBoxInformation);
        break;
    case QSystemTrayIcon::NoIcon:
    default:
        break;
    }

    QGridLayout *layout = new QGridLayout;
    if (!si.isNull()) {
        QLabel *iconLabel = new QLabel;
        iconLabel->setPixmap(si.pixmap(15, 15));
        iconLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
        iconLabel->setMargin(2);
        layout->addWidget(iconLabel, 0, 0);
        layout->addWidget(titleLabel, 0, 1);
    } else {
        layout->addWidget(titleLabel, 0, 0, 1, 2);
    }

    layout->addWidget(closeButton, 0, 2);
    layout->addWidget(msgLabel, 1, 0, 1, 3);
    layout->setSizeConstraint(QLayout::SetFixedSize);
    layout->setMargin(3);
    setLayout(layout);

    QPalette pal = palette();
    pal.setColor(QPalette::Window, QColor(0xff, 0xff, 0xe1));
    setPalette(pal);
}

QBalloonTip::~QBalloonTip()
{
    theSolitaryBalloonTip = 0;
}

void QBalloonTip::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    painter.drawPixmap(rect(), pixmap);
}

void QBalloonTip::resizeEvent(QResizeEvent *ev)
{
    QWidget::resizeEvent(ev);
}

void QBalloonTip::balloon(const QPoint& pos, int msecs, bool showArrow)
{
    QRect scr = QApplication::desktop()->screenGeometry(pos);
    QSize sh = sizeHint();
    const int border = 1;
    const int ah = 18, ao = 18, aw = 18, rc = 7;
    bool arrowAtTop = (pos.y() + sh.height() + ah < scr.height());
    bool arrowAtLeft = (pos.x() + sh.width() - ao < scr.width());
    setContentsMargins(border + 3,  border + (arrowAtTop ? ah : 0) + 2, border + 3, border + (arrowAtTop ? 0 : ah) + 2);
    updateGeometry();
    sh  = sizeHint();

    int ml, mr, mt, mb;
    QSize sz = sizeHint();
    if (!arrowAtTop) {
        ml = mt = 0;
        mr = sz.width() - 1;
        mb = sz.height() - ah - 1;
    } else {
        ml = 0;
        mt = ah;
        mr = sz.width() - 1;
        mb = sz.height() - 1;
    }

    QPainterPath path;
    path.moveTo(ml + rc, mt);
    if (arrowAtTop && arrowAtLeft) {
        if (showArrow) {
            path.lineTo(ml + ao, mt);
            path.lineTo(ml + ao, mt - ah);
            path.lineTo(ml + ao + aw, mt);
        }
        move(qMax(pos.x() - ao, scr.left() + 2), pos.y());
    } else if (arrowAtTop && !arrowAtLeft) {
        if (showArrow) {
            path.lineTo(mr - ao - aw, mt);
            path.lineTo(mr - ao, mt - ah);
            path.lineTo(mr - ao, mt);
        }
        move(qMin(pos.x() - sh.width() + ao, scr.right() - sh.width() - 2), pos.y());
    }
    path.lineTo(mr - rc, mt);
    path.arcTo(QRect(mr - rc*2, mt, rc*2, rc*2), 90, -90);
    path.lineTo(mr, mb - rc);
    path.arcTo(QRect(mr - rc*2, mb - rc*2, rc*2, rc*2), 0, -90);
    if (!arrowAtTop && !arrowAtLeft) {
        if (showArrow) {
            path.lineTo(mr - ao, mb);
            path.lineTo(mr - ao, mb + ah);
            path.lineTo(mr - ao - aw, mb);
        }
        move(qMin(pos.x() - sh.width() + ao, scr.right() - sh.width() - 2),
             pos.y() - sh.height());
    } else if (!arrowAtTop && arrowAtLeft) {
        if (showArrow) {
            path.lineTo(ao + aw, mb);
            path.lineTo(ao, mb + ah);
            path.lineTo(ao, mb);
        }
        move(qMax(pos.x() - ao, scr.x() + 2), pos.y() - sh.height());
    }
    path.lineTo(ml + rc, mb);
    path.arcTo(QRect(ml, mb - rc*2, rc*2, rc*2), -90, -90);
    path.lineTo(ml, mt + rc);
    path.arcTo(QRect(ml, mt, rc*2, rc*2), 180, -90);

    // Set the mask
    QBitmap bitmap = QBitmap(sizeHint());
    bitmap.fill(Qt::color0);
    QPainter painter1(&bitmap);
    painter1.setPen(QPen(Qt::color1, border));
    painter1.setBrush(QBrush(Qt::color1));
    painter1.drawPath(path);
    setMask(bitmap);

    // Draw the border
    pixmap = QPixmap(sz);
    QPainter painter2(&pixmap);
    painter2.setPen(QPen(Qt::black, border));
    painter2.setBrush(palette().color(QPalette::Window));
    painter2.drawPath(path);

    if (msecs > 0)
        timerId = startTimer(msecs);
    show();
}

void QBalloonTip::mousePressEvent(QMouseEvent *e)
{
    close();
    if(e->button() == Qt::LeftButton)
        emit trayIcon->messageClicked();
}

void QBalloonTip::timerEvent(QTimerEvent *e)
{
    if (e->timerId() == timerId) {
        killTimer(timerId);
        if (!underMouse())
            close();
        return;
    }
    QWidget::timerEvent(e);
}

void qtsystray_sendActivated(QSystemTrayIcon *i, int r)
{
    emit i->activated((QSystemTrayIcon::ActivationReason)r);
}

#endif // QT_NO_SYSTEMTRAYICON