QMacWindowSurface Class Reference

#include <qwindowsurface_mac_p.h>

Inheritance diagram for QMacWindowSurface:

Public Functions
void	flush (QWidget *widget, const QRegion &region, const QPoint &offset)
	Flushes the given region from the specified widget onto the screen. More...
QPaintDevice *	paintDevice ()
	Implement this function to return the appropriate paint device. More...
	QMacWindowSurface (QWidget *widget)
bool	scroll (const QRegion &area, int dx, int dy)
	Scrolls the given area dx pixels to the right and dy downward; both dx and dy may be negative. More...
void	setGeometry (const QRect &rect)
	Sets the currently allocated area to be the given rect. More...
	~QMacWindowSurface ()
Public Functions inherited from QWindowSurface
virtual void	beginPaint (const QRegion &)
	This function is called before painting onto the surface begins, with the region in which the painting will occur. More...
virtual QImage *	buffer (const QWidget *widget)
	Returns a QImage pointer which represents the actual buffer the widget is drawn into or 0 if this is unavailable. More...
virtual void	endPaint (const QRegion &)
	This function is called after painting onto the surface has ended, with the region in which the painting was performed. More...
virtual WindowSurfaceFeatures	features () const
QRect	geometry () const
	Returns the currently allocated area on the screen. More...
virtual QPixmap	grabWidget (const QWidget *widget, const QRect &rectangle=QRect()) const
	Returns a QPixmap generated from the part of the backing store corresponding to widget. More...
bool	hasFeature (WindowSurfaceFeature feature) const
virtual QPoint	offset (const QWidget *widget) const
	Returns the offset of widget in the coordinates of this window surface. More...
	QWindowSurface (QWidget *window, bool setDefaultSurface=true)
	Constructs an empty surface for the given top-level window. More...
QRect	rect (const QWidget *widget) const
	Returns the rectangle for widget in the coordinates of this window surface. More...
void	setStaticContents (const QRegion &region)
QRegion	staticContents () const
QWidget *	window () const
	Returns a pointer to the top-level window associated with this surface. More...
virtual	~QWindowSurface ()
	Destroys this surface. More...

Properties
QMacWindowSurfacePrivate *	d_ptr

Additional Inherited Members
Public Types inherited from QWindowSurface
enum	WindowSurfaceFeature { PartialUpdates = 0x00000001, PreservedContents = 0x00000002, StaticContents = 0x00000004, AllFeatures = 0xffffffff }
Protected Functions inherited from QWindowSurface
bool	hasStaticContents () const

Detailed Description

Definition at line 67 of file qwindowsurface_mac_p.h.

Constructors and Destructors

QMacWindowSurface()

QMacWindowSurface::QMacWindowSurface

(

QWidget *

widget

)

Definition at line 56 of file qwindowsurface_mac.cpp.

    : QWindowSurface(widget), d_ptr(new QMacWindowSurfacePrivate)
{
    d_ptr->widget = widget;
}

~QMacWindowSurface()

QMacWindowSurface::~QMacWindowSurface

(

)

Definition at line 62 of file qwindowsurface_mac.cpp.

{
    delete d_ptr;
}

Functions

flush()

void QMacWindowSurface::flush ( QWidget *  widget, const QRegion &  region, const QPoint &  offset  )

virtual

Flushes the given region from the specified widget onto the screen.

Note that the offset parameter is currently unused.

Implements QWindowSurface.

Definition at line 72 of file qwindowsurface_mac.cpp.

{
    Q_UNUSED(offset);

    // Get a context for the widget.
#ifndef QT_MAC_USE_COCOA
    CGContextRef context;
    CGrafPtr port = GetWindowPort(qt_mac_window_for(widget));
    QDBeginCGContext(port, &context);
#else
    extern CGContextRef qt_mac_graphicsContextFor(QWidget *);
    CGContextRef context = qt_mac_graphicsContextFor(widget);
#endif
    CGContextRetain(context);
    CGContextSaveGState(context);

    // Flip context.
    CGContextTranslateCTM(context, 0, widget->height());
    CGContextScaleCTM(context, 1, -1);

    // Clip to region.
    const QVector<QRect> &rects = rgn.rects();
    for (int i = 0; i < rects.size(); ++i) {
        const QRect &rect = rects.at(i);
        CGContextAddRect(context, CGRectMake(rect.x(), rect.y(), rect.width(), rect.height()));
    }
    CGContextClip(context);

    // Draw the image onto the window.
    const CGRect dest = CGRectMake(0, 0, widget->width(), widget->height());
    const CGImageRef image = d_ptr->device.toMacCGImageRef();
    qt_mac_drawCGImage(context, &dest, image);
    CFRelease(image);

    // Restore context.
    CGContextRestoreGState(context);
#ifndef QT_MAC_USE_COCOA
    QDEndCGContext(port, &context);
#else
    CGContextFlush(context);
#endif
    CGContextRelease(context);
}

paintDevice()

QPaintDevice * QMacWindowSurface::paintDevice ( )

virtual

Implement this function to return the appropriate paint device.

Implements QWindowSurface.

Definition at line 67 of file qwindowsurface_mac.cpp.

{
    return &d_ptr->device;
}

scroll()

bool QMacWindowSurface::scroll ( const QRegion &  area, int  dx, int  dy  )

virtual

Scrolls the given area dx pixels to the right and dy downward; both dx and dy may be negative.

Returns true if the area was scrolled successfully; false otherwise.

Reimplemented from QWindowSurface.

Definition at line 124 of file qwindowsurface_mac.cpp.

{
    if (d_ptr->device.size().isNull())
        return false;

    QCFType<CGImageRef> image = d_ptr->device.toMacCGImageRef();
    const QRect rect(area.boundingRect());
    const CGRect dest = CGRectMake(rect.x(), rect.y(), rect.width(), rect.height());
    QCFType<CGImageRef> subimage = CGImageCreateWithImageInRect(image, dest);
    QCFType<CGContextRef> context = qt_mac_cg_context(&d_ptr->device);
    CGContextTranslateCTM(context, dx, dy);
    qt_mac_drawCGImage(context, &dest, subimage);
    return true;
}

setGeometry()

void QMacWindowSurface::setGeometry ( const QRect &  rect )

virtual

Sets the currently allocated area to be the given rect.

This function is called whenever area covered by the top-level window changes.

See also

geometry()

Reimplemented from QWindowSurface.

Definition at line 116 of file qwindowsurface_mac.cpp.

{
    QWindowSurface::setGeometry(rect);
    const QSize size = rect.size();
    if (d_ptr->device.size() != size)
        d_ptr->device = QPixmap(size);
}

Properties

d_ptr

QMacWindowSurfacePrivate* QMacWindowSurface::d_ptr

private

Definition at line 79 of file qwindowsurface_mac_p.h.

Referenced by flush(), paintDevice(), QMacWindowSurface(), scroll(), setGeometry(), and ~QMacWindowSurface().

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

• /src/gui/painting/qwindowsurface_mac_p.h
• /src/gui/painting/qwindowsurface_mac.cpp