qt_demoe/third/3rd_qwt/qwt_pixel_matrix.cpp

52 lines
1.1 KiB
C++

/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
* Qwt Widget Library
* Copyright (C) 1997 Josef Wilgen
* Copyright (C) 2002 Uwe Rathmann
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the Qwt License, Version 1.0
*****************************************************************************/
#include "qwt_pixel_matrix.h"
/*!
\brief Constructor
\param rect Bounding rectangle for the matrix
*/
QwtPixelMatrix::QwtPixelMatrix( const QRect& rect ):
QBitArray( qMax( rect.width() * rect.height(), 0 ) ),
d_rect( rect )
{
}
//! Destructor
QwtPixelMatrix::~QwtPixelMatrix()
{
}
/*!
Set the bounding rectangle of the matrix
\param rect Bounding rectangle
\note All bits are cleared
*/
void QwtPixelMatrix::setRect( const QRect& rect )
{
if ( rect != d_rect )
{
d_rect = rect;
const int sz = qMax( rect.width() * rect.height(), 0 );
resize( sz );
}
fill( false );
}
//! \return Bounding rectangle
QRect QwtPixelMatrix::rect() const
{
return d_rect;
}