本文整理汇总了C++中QwtDoubleRect::topLeft方法的典型用法代码示例。如果您正苦于以下问题：C++ QwtDoubleRect::topLeft方法的具体用法？C++ QwtDoubleRect::topLeft怎么用？C++ QwtDoubleRect::topLeft使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QwtDoubleRect的用法示例。
在下文中一共展示了QwtDoubleRect::topLeft方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: drawCanvas
/*!
Draw the canvas
Paints all plot items to the canvasRect, using QwtPolarPlot::drawCanvas
and updates the paint cache.
\sa QwtPolarPlot::drawCanvas, setPaintAttributes(), testPaintAttributes()
*/
void QwtPolarCanvas::drawCanvas( QPainter *painter,
const QwtDoubleRect& canvasRect )
{
if ( !canvasRect.isValid() )
return;
if ( testPaintAttribute( PaintCached ) && d_data->cache )
{
*d_data->cache = QPixmap( contentsRect().size() );
#ifdef Q_WS_X11
#if QT_VERSION >= 0x040000
if ( d_data->cache->x11Info().screen() != x11Info().screen() )
d_data->cache->x11SetScreen( x11Info().screen() );
#else
if ( d_data->cache->x11Screen() != x11Screen() )
d_data->cache->x11SetScreen( x11Screen() );
#endif
#endif
d_data->cache->fill( this, d_data->cache->rect().topLeft() );
QPainter cachePainter( d_data->cache );
cachePainter.translate( -contentsRect().x(),
-contentsRect().y() );
plot()->drawCanvas( &cachePainter, canvasRect );
cachePainter.end();
painter->drawPixmap( canvasRect.topLeft().toPoint(), *d_data->cache );
}
else
plot()->drawCanvas( painter, canvasRect );
}示例2: drawCanvas
/*!
Redraw the canvas.
\param painter Painter used for drawing
\param canvasRect Contents rect of the canvas
*/
void QwtPolarPlot::drawCanvas( QPainter *painter,
const QwtDoubleRect &canvasRect ) const
{
const QwtDoubleRect cr = canvasRect;
const QwtDoubleRect pr = plotRect( cr.toRect() );
const double radius = pr.width() / 2.0;
if ( d_data->canvasBrush.style() != Qt::NoBrush )
{
painter->save();
painter->setPen( Qt::NoPen );
painter->setBrush( d_data->canvasBrush );
if ( qwtDistance( pr.center(), cr.topLeft() ) < radius &&
qwtDistance( pr.center(), cr.topRight() ) < radius &&
qwtDistance( pr.center(), cr.bottomRight() ) < radius &&
qwtDistance( pr.center(), cr.bottomLeft() ) < radius )
{
QwtPainter::drawRect( painter, cr.toRect() );
}
else
{
#if QT_VERSION < 0x040000
QwtPainter::drawEllipse( painter, pr.toRect() );
#else
painter->setRenderHint( QPainter::Antialiasing, true );
QwtPainter::drawEllipse( painter, pr.toRect() );
#endif
}
painter->restore();
}
drawItems( painter,
scaleMap( QwtPolar::Azimuth, radius ),
scaleMap( QwtPolar::Radius, radius ),
pr.center(), radius, canvasRect );
}示例3: visibleInterval
/*!
Calculate the bounding interval of the radial scale that is
visible on the canvas.
*/
QwtDoubleInterval QwtPolarPlot::visibleInterval() const
{
const QwtScaleDiv *sd = scaleDiv( QwtPolar::Radius );
const QwtDoubleRect cRect = canvas()->contentsRect();
const QwtDoubleRect pRect = plotRect( cRect.toRect() );
if ( cRect.contains( pRect.toRect() ) || !cRect.intersects( pRect ) )
{
#if QWT_VERSION < 0x050200
return QwtDoubleInterval( sd->lBound(), sd->hBound() );
#else
return QwtDoubleInterval( sd->lowerBound(), sd->upperBound() );
#endif
}
const QwtDoublePoint pole = pRect.center();
const QwtDoubleRect scaleRect = pRect & cRect;
const QwtScaleMap map = scaleMap( QwtPolar::Radius );
double dmin = 0.0;
double dmax = 0.0;
if ( scaleRect.contains( pole ) )
{
dmin = 0.0;
QwtDoublePoint corners[4];
corners[0] = scaleRect.bottomRight();
corners[1] = scaleRect.topRight();
corners[2] = scaleRect.topLeft();
corners[3] = scaleRect.bottomLeft();
dmax = 0.0;
for ( int i = 0; i < 4; i++ )
{
const double dist = qwtDistance( pole, corners[i] );
if ( dist > dmax )
dmax = dist;
}
}
else
{
if ( pole.x() < scaleRect.left() )
{
if ( pole.y() < scaleRect.top() )
{
dmin = qwtDistance( pole, scaleRect.topLeft() );
dmax = qwtDistance( pole, scaleRect.bottomRight() );
}
else if ( pole.y() > scaleRect.bottom() )
{
dmin = qwtDistance( pole, scaleRect.bottomLeft() );
dmax = qwtDistance( pole, scaleRect.topRight() );
}
else
{
dmin = scaleRect.left() - pole.x();
dmax = qwtMax( qwtDistance( pole, scaleRect.bottomRight() ),
qwtDistance( pole, scaleRect.topRight() ) );
}
}
else if ( pole.x() > scaleRect.right() )
{
if ( pole.y() < scaleRect.top() )
{
dmin = qwtDistance( pole, scaleRect.topRight() );
dmax = qwtDistance( pole, scaleRect.bottomLeft() );
}
else if ( pole.y() > scaleRect.bottom() )
{
dmin = qwtDistance( pole, scaleRect.bottomRight() );
dmax = qwtDistance( pole, scaleRect.topLeft() );
}
else
{
dmin = pole.x() - scaleRect.right();
dmax = qwtMax( qwtDistance( pole, scaleRect.bottomLeft() ),
qwtDistance( pole, scaleRect.topLeft() ) );
}
}
else if ( pole.y() < scaleRect.top() )
{
dmin = scaleRect.top() - pole.y();
dmax = qwtMax( qwtDistance( pole, scaleRect.bottomLeft() ),
qwtDistance( pole, scaleRect.bottomRight() ) );
}
else if ( pole.y() > scaleRect.bottom() )
{
dmin = pole.y() - scaleRect.bottom();
dmax = qwtMax( qwtDistance( pole, scaleRect.topLeft() ),
qwtDistance( pole, scaleRect.topRight() ) );
}
}
const double radius = pRect.width() / 2.0;
if ( dmax > radius )
//.........这里部分代码省略.........