CursorWindow Class Reference

Inheritance diagram for CursorWindow:

[legend]Collaboration diagram for CursorWindow:

[legend]List of all members.

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Detailed Description

Definition at line 50 of file skin.cpp.

Public Member Functions
	CursorWindow (const QString &fn, QPoint hot, QWidget *sk)
void	setView (QVFbView *)
void	setPos (QPoint)
bool	handleMouseEvent (QEvent *ev)
Protected Member Functions
bool	event (QEvent *)
bool	eventFilter (QObject *, QEvent *)
Private Attributes
QWidget *	mouseRecipient
QVFbView *	view
QWidget *	skin
QPoint	hotspot

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Constructor & Destructor Documentation

CursorWindow::CursorWindow	(	const QString &	fn,
		QPoint	hot,
		QWidget *	sk
	)

Definition at line 689 of file skin.cpp.

References QWidget::backgroundRole(), Qt::BlankCursor, QImage::createAlphaMask(), QImage::createHeuristicMask(), Qt::FramelessWindowHint, QPixmap::fromImage(), QImage::hasAlphaChannel(), mouseRecipient, p, QWidget::palette(), QPalette::setBrush(), QWidget::setCursor(), QWidget::setFixedSize(), QWidget::setMask(), QWidget::setMouseTracking(), QWidget::setPalette(), and QWidget::setWindowFlags().

  :QWidget(0),
  view(0), skin(sk),
  hotspot(hot)
{
    setWindowFlags( Qt::FramelessWindowHint );
    mouseRecipient = 0;
    setMouseTracking(true);
    setCursor(Qt::BlankCursor);
    QImage img( fn );
    QPixmap p;
    p = QPixmap::fromImage( img );
    if ( !p.mask() )
  if ( img.hasAlphaChannel() ) {
      QBitmap bm;
      bm = QPixmap::fromImage(img.createAlphaMask());
      p.setMask( bm );
  } else {
      QBitmap bm;
      bm = QPixmap::fromImage(img.createHeuristicMask());
      p.setMask( bm );
  }
    QPalette palette;
    palette.setBrush(backgroundRole(), QBrush(p));
    setPalette(palette);
    setFixedSize( p.size() );
    if ( !p.mask().isNull() )
  setMask( p.mask() );
}

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Member Function Documentation

void CursorWindow::setView

(

QVFbView *

)

Definition at line 677 of file skin.cpp.

References QObject::installEventFilter(), mouseRecipient, QObject::removeEventFilter(), and view.

Referenced by Skin::loadImages(), and Skin::setView().

{
    if ( view ) {
  view->removeEventFilter(this);
  view->removeEventFilter(this);
    }
    view = v;
    view->installEventFilter(this);
    view->installEventFilter(this);
    mouseRecipient = 0;
}

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void CursorWindow::setPos

(

QPoint

)

Definition at line 719 of file skin.cpp.

References hotspot, QWidget::move(), p, QWidget::raise(), and QWidget::show().

Referenced by handleMouseEvent(), and Skin::mouseMoveEvent().

{
    move(p-hotspot);
    show();
    raise();
}

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bool CursorWindow::handleMouseEvent

(

QEvent *

ev

)

Definition at line 638 of file skin.cpp.

References QRect::contains(), QWidget::geometry(), QWidget::hide(), QWidget::mapFromGlobal(), QEvent::MouseButtonDblClick, QEvent::MouseButtonPress, QEvent::MouseButtonRelease, QEvent::MouseMove, mouseRecipient, QWidget::parentWidget(), QWidget::rect(), QCoreApplication::sendEvent(), setPos(), skin, QEvent::type(), and view.

Referenced by event(), and eventFilter().

{
    bool handledEvent = false;
    static int inhere=0;
    if ( !inhere ) {
  inhere++;
  if ( view ) {
      if ( ev->type() >= QEvent::MouseButtonPress && ev->type() <= QEvent::MouseMove ) {
    QMouseEvent *e = (QMouseEvent*)ev;
    QPoint gp = e->globalPos();
    QPoint vp = view->mapFromGlobal(gp);
    QPoint sp = skin->mapFromGlobal(gp);
    if ( e->type() == QEvent::MouseButtonPress || e->type() == QEvent::MouseButtonDblClick ) {
        if ( view->rect().contains(vp) )
      mouseRecipient = view;
        else if ( skin->parentWidget()->geometry().contains(gp) )
      mouseRecipient = skin;
        else
      mouseRecipient = 0;
    }
    if ( mouseRecipient ) {
        setPos(gp);
        QMouseEvent me(e->type(),mouseRecipient==skin ? sp : vp,gp,e->button(),e->buttons(),e->modifiers());
        QApplication::sendEvent(mouseRecipient, &me);
    } else if ( !skin->parentWidget()->geometry().contains(gp) ) {
        hide();
    } else {
        setPos(gp);
    }
    if ( e->type() == QEvent::MouseButtonRelease )
        mouseRecipient = 0;
    handledEvent = true;
      }
  }
  inhere--;
    }
    return handledEvent;
}

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bool CursorWindow::event

(

QEvent *

ev

)

[protected, virtual]

This is the main event handler; it handles event event. You can reimplement this function in a subclass, but we recommend using one of the specialized event handlers instead.

Key press and release events are treated differently from other events. event() checks for Tab and Shift+Tab and tries to move the focus appropriately. If there is no widget to move the focus to (or the key press is not Tab or Shift+Tab), event() calls keyPressEvent().

Mouse and tablet event handling is also slightly special: only when the widget is enabled, event() will call the specialized handlers such as mousePressEvent(); otherwise it will discard the event.

This function returns true if the event was recognized, otherwise it returns false. If the recognized event was accepted (see QEvent::accepted), any further processing such as event propagation to the parent widget stops.

See also:

closeEvent(), focusInEvent(), focusOutEvent(), enterEvent(), keyPressEvent(), keyReleaseEvent(), leaveEvent(), mouseDoubleClickEvent(), mouseMoveEvent(), mousePressEvent(), mouseReleaseEvent(), moveEvent(), paintEvent(), resizeEvent(), QObject::event(), QObject::timerEvent()

Reimplemented from QWidget.

Definition at line 631 of file skin.cpp.

References QWidget::event(), and handleMouseEvent().

{
    if (handleMouseEvent(ev))
        return true;
    return QWidget::event(ev);
}

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bool CursorWindow::eventFilter	(	QObject *	,
		QEvent *	ev
	)			[protected, virtual]

Filters events if this object has been installed as an event filter for the watched object.

In your reimplementation of this function, if you want to filter the event out, i.e. stop it being handled further, return true; otherwise return false.

Example:

        class MainWindow : public QMainWindow
        {
        public:
            MainWindow();

        protected:
            bool eventFilter(QObject *obj, QEvent *ev);

        private:
            QTextEdit *textEdit;
        };

        MainWindow::MainWindow()
        {
            textEdit = new QTextEdit;
            setCentralWidget(textEdit);

            textEdit->installEventFilter(this);
        }

        bool MainWindow::eventFilter(QObject *obj, QEvent *event)
        {
            if (obj == textEdit) {
                if (event->type() == QEvent::KeyPress) {
                    QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
                    qDebug() << "Ate key press" << keyEvent->key();
                    return true;
                } else {
                    return false;
                }
            } else {
                // pass the event on to the parent class
                return QMainWindow::eventFilter(obj, event);
            }
        }

Notice in the example above that unhandled events are passed to the base class's eventFilter() function, since the base class might have reimplemented eventFilter() for its own internal purposes.

Warning:

If you delete the receiver object in this function, be sure to return true. Otherwise, Qt will forward the event to the deleted object and the program might crash.

See also:

installEventFilter()

Reimplemented from QObject.

Definition at line 625 of file skin.cpp.

References handleMouseEvent().

{
    handleMouseEvent(ev);
    return false;
}

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Member Data Documentation

QWidget* CursorWindow::mouseRecipient [private]

Definition at line 64 of file skin.cpp.

Referenced by CursorWindow(), handleMouseEvent(), and setView().

QVFbView* CursorWindow::view [private]

Definition at line 65 of file skin.cpp.

Referenced by handleMouseEvent(), and setView().

QWidget* CursorWindow::skin [private]

Definition at line 66 of file skin.cpp.

Referenced by handleMouseEvent().

QPoint CursorWindow::hotspot [private]

Definition at line 67 of file skin.cpp.

Referenced by setPos().

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The documentation for this class was generated from the following file:

• tools/qvfb/skin.cpp

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