QDirectFBScreenCursor Class Reference

Inheritance diagram for QDirectFBScreenCursor:

Public Functions
virtual void	hide ()
	Hides the cursor from the screen. More...
virtual void	move (int x, int y)
	Moves the mouse cursor to the given position, i.e., (x, y). More...
	QDirectFBScreenCursor ()
virtual void	set (const QImage &image, int hotx, int hoty)
	Sets the cursor's image to be the given image. More...
virtual void	show ()
	Shows the mouse cursor. More...
Public Functions inherited from QScreenCursor
QRect	boundingRect () const
	Returns the cursor's bounding rectangle. More...
QImage	image () const
	Returns the cursor's image. More...
bool	isAccelerated () const
	Returns true if the cursor is accelerated; otherwise false. More...
bool	isVisible () const
	Returns true if the cursor is visible; otherwise false. More...
	QScreenCursor ()
	Constructs a screen cursor. More...
bool	supportsAlphaCursor () const
virtual	~QScreenCursor ()
	Destroys the screen cursor. More...

Properties
IDirectFBDisplayLayer *	layer

Additional Inherited Members
Static Public Functions inherited from QScreenCursor
static bool	enabled ()
static void	initSoftwareCursor ()
	Initializes the screen cursor. More...
static QScreenCursor *	instance ()
Protected Variables inherited from QScreenCursor
QImage	cursor
uint	enable: 1
QPoint	hotspot
uint	hwaccel: 1
QPoint	pos
QSize	size
uint	supportsAlpha: 1

Detailed Description

Definition at line 532 of file qdirectfbscreen.cpp.

Constructors and Destructors

QDirectFBScreenCursor()

QDirectFBScreenCursor::QDirectFBScreenCursor

(

)

Definition at line 549 of file qdirectfbscreen.cpp.

{
    IDirectFB *fb = QDirectFBScreen::instance()->dfb();
    if (!fb)
        qFatal("QDirectFBScreenCursor: DirectFB not initialized");

    layer = QDirectFBScreen::instance()->dfbDisplayLayer();
    Q_ASSERT(layer);

    enable = false;
    hwaccel = true;
    supportsAlpha = true;
#ifdef QT_DIRECTFB_WINDOW_AS_CURSOR
    window = 0;
    DFBResult result = layer->SetCooperativeLevel(layer, DLSCL_ADMINISTRATIVE);
    if (result != DFB_OK) {
        DirectFBError("QDirectFBScreenCursor::hide: "
                      "Unable to set cooperative level", result);
    }
    result = layer->SetCursorOpacity(layer, 0);
    if (result != DFB_OK) {
        DirectFBError("QDirectFBScreenCursor::hide: "
                      "Unable to set cursor opacity", result);
    }

    result = layer->SetCooperativeLevel(layer, DLSCL_SHARED);
    if (result != DFB_OK) {
        DirectFBError("QDirectFBScreenCursor::hide: "
                      "Unable to set cooperative level", result);
    }
#endif
}

Functions

hide()

void QDirectFBScreenCursor::hide ( )

virtual

Hides the cursor from the screen.

See also

show()

Reimplemented from QScreenCursor.

Definition at line 655 of file qdirectfbscreen.cpp.

{
    if (enable) {
        enable = false;
        DFBResult result;
#ifndef QT_DIRECTFB_WINDOW_AS_CURSOR
        result = layer->SetCooperativeLevel(layer, DLSCL_ADMINISTRATIVE);
        if (result != DFB_OK) {
            DirectFBError("QDirectFBScreenCursor::hide: "
                          "Unable to set cooperative level", result);
        }
        result = layer->SetCursorOpacity(layer, 0);
        if (result != DFB_OK) {
            DirectFBError("QDirectFBScreenCursor::hide: "
                          "Unable to set cursor opacity", result);
        }
        result = layer->SetCooperativeLevel(layer, DLSCL_SHARED);
        if (result != DFB_OK) {
            DirectFBError("QDirectFBScreenCursor::hide: "
                          "Unable to set cooperative level", result);
        }
#else
        if (window) {
            result = window->SetOpacity(window, 0);
            if (result != DFB_OK) {
                DirectFBError("QDirectFBScreenCursor::hide: "
                              "Unable to set window opacity", result);
            }
        }
#endif
    }
}

move()

void QDirectFBScreenCursor::move ( int  x, int  y  )

virtual

Moves the mouse cursor to the given position, i.e., (x, y).

Note that the given position defines the top-left corner of the cursor's image, i.e., not the cursor's hot spot (the position of the associated mouse events).

See also

set()

Reimplemented from QScreenCursor.

Definition at line 639 of file qdirectfbscreen.cpp.

{
    pos = QPoint(x, y);
#ifdef QT_DIRECTFB_WINDOW_AS_CURSOR
    if (window) {
        const QPoint p = pos - hotspot;
        DFBResult result = window->MoveTo(window, p.x(), p.y());
        if (result != DFB_OK) {
            DirectFBError("QDirectFBScreenCursor::move: Unable to move window", result);
        }
    }
#else
    layer->WarpCursor(layer, x, y);
#endif
}

set()

void QDirectFBScreenCursor::set ( const QImage &  image, int  hotx, int  hoty  )

virtual

Sets the cursor's image to be the given image.

The hotx and hoty parameters define the cursor's hot spot, i.e., the point within the cursor's image that will be the position of the associated mouse events.

See also

move()

Reimplemented from QScreenCursor.

Definition at line 726 of file qdirectfbscreen.cpp.

{
    QDirectFBScreen *screen = QDirectFBScreen::instance();
    if (!screen)
        return;

    if (image.isNull()) {
        cursor = QImage();
        hide();
    } else {
        cursor = image.convertToFormat(screen->alphaPixmapFormat());
        size = cursor.size();
        hotspot = QPoint(hotx, hoty);
        DFBResult result = DFB_OK;
        IDirectFBSurface *surface = screen->createDFBSurface(cursor, screen->alphaPixmapFormat(),
                                                             QDirectFBScreen::DontTrackSurface, &result);
        if (!surface) {
            DirectFBError("QDirectFBScreenCursor::set: Unable to create surface", result);
            return;
        }
#ifndef QT_DIRECTFB_WINDOW_AS_CURSOR
        result = layer->SetCooperativeLevel(layer, DLSCL_ADMINISTRATIVE);
        if (result != DFB_OK) {
            DirectFBError("QDirectFBScreenCursor::show: "
                          "Unable to set cooperative level", result);
        }
        result = layer->SetCursorShape(layer, surface, hotx, hoty);
        if (result != DFB_OK) {
            DirectFBError("QDirectFBScreenCursor::show: "
                          "Unable to set cursor shape", result);
        }
        result = layer->SetCooperativeLevel(layer, DLSCL_SHARED);
        if (result != DFB_OK) {
            DirectFBError("QDirectFBScreenCursor::show: "
                          "Unable to set cooperative level", result);
        }
#else
        if (window || createWindow()) {
            QSize windowSize;
            result = window->GetSize(window, &windowSize.rwidth(), &windowSize.rheight());
            if (result != DFB_OK) {
                DirectFBError("QDirectFBScreenCursor::set: "
                              "Unable to get window size", result);
            }
            result = window->Resize(window, size.width(), size.height());
            if (result != DFB_OK) {
                DirectFBError("QDirectFBScreenCursor::set: Unable to resize window", result);
            }

            IDirectFBSurface *windowSurface;
            result = window->GetSurface(window, &windowSurface);
            if (result != DFB_OK) {
                DirectFBError("QDirectFBScreenCursor::set: Unable to get window surface", result);
            } else {
                result = windowSurface->Clear(windowSurface, 0, 0, 0, 0);
                if (result != DFB_OK) {
                    DirectFBError("QDirectFBScreenCursor::set: Unable to clear surface", result);
                }

                result = windowSurface->Blit(windowSurface, surface, 0, 0, 0);
                if (result != DFB_OK) {
                    DirectFBError("QDirectFBScreenCursor::set: Unable to blit to surface", result);
                }
            }
            result = windowSurface->Flip(windowSurface, 0, DSFLIP_NONE);
            if (result != DFB_OK) {
                DirectFBError("QDirectFBScreenCursor::set: Unable to flip window", result);
            }

            windowSurface->Release(windowSurface);
        }
#endif
        surface->Release(surface);
        show();
    }

}

show()

void QDirectFBScreenCursor::show ( )

virtual

Shows the mouse cursor.

See also

hide()

Reimplemented from QScreenCursor.

Definition at line 688 of file qdirectfbscreen.cpp.

{
    if (!enable) {
        enable = true;
        DFBResult result;
        result = layer->SetCooperativeLevel(layer, DLSCL_ADMINISTRATIVE);
        if (result != DFB_OK) {
            DirectFBError("QDirectFBScreenCursor::show: "
                          "Unable to set cooperative level", result);
        }
        result = layer->SetCursorOpacity(layer,
#ifdef QT_DIRECTFB_WINDOW_AS_CURSOR
                                         0
#else
                                         255
#endif
            );
        if (result != DFB_OK) {
            DirectFBError("QDirectFBScreenCursor::show: "
                          "Unable to set cursor shape", result);
        }
        result = layer->SetCooperativeLevel(layer, DLSCL_SHARED);
        if (result != DFB_OK) {
            DirectFBError("QDirectFBScreenCursor::show: "
                          "Unable to set cooperative level", result);
        }
#ifdef QT_DIRECTFB_WINDOW_AS_CURSOR
        if (window) {
            DFBResult result = window->SetOpacity(window, 255);
            if (result != DFB_OK) {
                DirectFBError("QDirectFBScreenCursor::show: "
                              "Unable to set window opacity", result);
            }
        }
#endif
    }
}

Properties

layer

IDirectFBDisplayLayer* QDirectFBScreenCursor::layer

private

Definition at line 546 of file qdirectfbscreen.cpp.

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

• /src/plugins/gfxdrivers/directfb/qdirectfbscreen.cpp