source: trunk/src/gui/image/qiconengine.cpp@ 635

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#include "qiconengine.h"
#include "qpainter.h"

QT_BEGIN_NAMESPACE

/*!
  \class QIconEngine

  \brief The QIconEngine class provides an abstract base class for QIcon renderers.

  \ingroup painting

  \bold {Use QIconEngineV2 instead.}

  An icon engine provides the rendering functions for a QIcon. Each icon has a
  corresponding icon engine that is responsible for drawing the icon with a
  requested size, mode and state.

  The icon is rendered by the paint() function, and the icon can additionally be
  obtained as a pixmap with the pixmap() function (the default implementation
  simply uses paint() to achieve this). The addPixmap() function can be used to
  add new pixmaps to the icon engine, and is used by QIcon to add specialized
  custom pixmaps.

  The paint(), pixmap(), and addPixmap() functions are all virtual, and can
  therefore be reimplemented in subclasses of QIconEngine.

  \sa QIconEngineV2, QIconEnginePlugin

*/

/*!
  \fn virtual void QIconEngine::paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state) = 0;

  Uses the given \a painter to paint the icon with the required \a mode and
  \a state into the rectangle \a rect.
*/

/*!  Returns the actual size of the icon the engine provides for the
  requested \a size, \a mode and \a state. The default implementation
  returns the given \a size.
 */
QSize QIconEngine::actualSize(const QSize &size, QIcon::Mode /*mode*/, QIcon::State /*state*/)
{
    return size;
}


/*!
  Destroys the icon engine.
 */
QIconEngine::~QIconEngine()
{
}


/*!
  Returns the icon as a pixmap with the required \a size, \a mode,
  and \a state. The default implementation creates a new pixmap and
  calls paint() to fill it.
*/
QPixmap QIconEngine::pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state)
{
    QPixmap pm(size);
    {
        QPainter p(&pm);
        paint(&p, QRect(QPoint(0,0),size), mode, state);
    }
    return pm;
}

/*!
  Called by QIcon::addPixmap(). Adds a specialized \a pixmap for the given