C++ QValueStack::top方法代码示例

bool QExp::isLast(QValueStack<char> opr){
	int ins=0;
	bool b=true;
	while(b && !opr.empty()){
		if(opr.top()==tLpr){
			if(ins == 0)
				b= true;
			else
				ins--;
		} else if(opr.top()==tLpr)
			ins++;
		else if(opr.top()==tComa)
			b= false;
		else if(opr.top()==tEof)
			b= false;
		opr.pop();
	}
	return b;
}

/**
  Paints the actual data area.

  \param painter the QPainter onto which the chart should be painted
  \param data the data that will be displayed as a chart
  \param paint2nd specifies whether the main chart or the additional chart is to be drawn now
  \param regions a pointer to a list of regions that will be filled
  with regions representing the data segments, if not null
  */
void KDChartPiePainter::paintData( QPainter* painter,
        KDChartTableDataBase* data,
        bool paint2nd,
        KDChartDataRegionList* regions )
{
//bHelp=true;
    uint chart = paint2nd ? 1 : 0;

    QRect ourClipRect( _dataRect );
    ourClipRect.addCoords( -1,-1,1,1 );

    const QWMatrix & world = painter->worldMatrix();
    ourClipRect =
#if COMPAT_QT_VERSION >= 0x030000
        world.mapRect( ourClipRect );
#else
    world.map( ourClipRect );
#endif

    painter->setClipRect( ourClipRect );

    // find which dataset to paint
    uint dataset;
    if ( !params()->findDataset( KDChartParams::DataEntry
                ,
                dataset, dataset ) ) {
        return ; // nothing to draw
    }

    if ( dataset == KDCHART_ALL_DATASETS )
        // setChartSourceMode() has not been used (or all datasets have been
        // configured to be used); use the first dataset by
        // default
        dataset = 0;


    // Number of values: If -1, use all values, otherwise use the
    // specified number of values.
    if ( params()->numValues() != -1 )
        _numValues = params()->numValues();
    else
        _numValues = data->usedCols();

    _startAngles.resize( _numValues );
    _angleLens.resize( _numValues );

    // compute position
    _size = QMIN( _dataRect.width(), _dataRect.height() ); // initial size
    // if the pies explode, we need to give them additional space =>
    // make the basic size smaller
    if ( params()->explode() ) {
        double doubleSize = ( double ) _size;
        doubleSize /= ( 1.0 + params()->explodeFactor() * 2 );
        _size = ( int ) doubleSize;
    }

    int sizeFor3DEffect = 0;
    if ( !params()->threeDPies() ) {

        int x = ( _dataRect.width() == _size ) ? 0 : ( ( _dataRect.width() - _size ) / 2 );
        int y = ( _dataRect.height() == _size ) ? 0 : ( ( _dataRect.height() - _size ) / 2 );
        _position = QRect( x, y, _size, _size );
        _position.moveBy( _dataRect.left(), _dataRect.top() );
    } else {
        // threeD: width is the maximum possible width; height is 1/2 of that
        int x = ( _dataRect.width() == _size ) ? 0 : ( ( _dataRect.width() - _size ) / 2 );
        int height = _size;
        // make sure that the height plus the threeDheight is not more than the
        // available size
        if ( params()->threeDPieHeight() >= 0 ) {
            // positive pie height: absolute value
            sizeFor3DEffect = params()->threeDPieHeight();
            height = _size - sizeFor3DEffect;
        } else {
            // negative pie height: relative value
            sizeFor3DEffect = -( int ) ( ( ( double ) params()->threeDPieHeight() / 100.0 ) * ( double ) height );
            height = _size - sizeFor3DEffect;
        }
        int y = ( _dataRect.height() == height ) ? 0 : ( ( _dataRect.height() - height - sizeFor3DEffect ) / 2 );

        _position = QRect( _dataRect.left() + x, _dataRect.top() + y,
                _size, height );
        //  _position.moveBy( _dataRect.left(), _dataRect.top() );
    }

    double sum = data->rowAbsSum( dataset );
    if( sum==0 ) //nothing to draw
        return;
    double sectorsPerValue = 5760.0 / sum; // 5760 == 16*360, number of sections in Qt circle

    int currentValue = params()->pieStart() * 16;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
			  while ( beta ) {
		      #else
			  while ( gamma ) {
		      #endif
			      delta;
			  }

		  The code contains, indeed, two opening braces for
		  one closing brace; yet there's no reason to panic.

		  The solution is to remember yyBraceDepth as it was
		  when #if, #ifdef or #ifndef was met, and to set
		  yyBraceDepth to that value when meeting #elif or
		  #else.
		*/
		do {
		    yyCh = getChar();
		} while ( isspace(yyCh) && yyCh != '\n' );

		switch ( yyCh ) {
		case 'i':
		    yyCh = getChar();
		    if ( yyCh == 'f' ) {
			// if, ifdef, ifndef
			yySavedBraceDepth.push( yyBraceDepth );
                        yySavedParenDepth.push( yyParenDepth );
		    }
		    break;
		case 'e':
		    yyCh = getChar();
		    if ( yyCh == 'l' ) {
			// elif, else
			if ( !yySavedBraceDepth.isEmpty() ) {
			    yyBraceDepth = yySavedBraceDepth.top();
                            yyParenDepth = yySavedParenDepth.top();
			}
		    } else if ( yyCh == 'n' ) {
			// endif
			if ( !yySavedBraceDepth.isEmpty() ) {
			    yySavedBraceDepth.pop();
                            yySavedParenDepth.pop();
			}
		    }
		}
		while ( isalnum(yyCh) || yyCh == '_' )
		    yyCh = getChar();
		break;
	    case '/':
		yyCh = getChar();
		if ( yyCh == '/' ) {
		    do {
			yyCh = getChar();
		    } while ( yyCh != EOF && yyCh != '\n' );
		} else if ( yyCh == '*' ) {
		    bool metAster = FALSE;
		    bool metAsterSlash = FALSE;

		    while ( !metAsterSlash ) {
			yyCh = getChar();
			if ( yyCh == EOF ) {
			    fprintf( stderr,
				     "%s: Unterminated C++ comment starting at"
				     " line %d\n",
				     (const char *) yyFileName, yyLineNo );
			    yyComment[yyCommentLen] = '\0';
			    return Tok_Comment;