本文整理汇总了C++中QwtPlotItem::isVisible方法的典型用法代码示例。如果您正苦于以下问题：C++ QwtPlotItem::isVisible方法的具体用法？C++ QwtPlotItem::isVisible怎么用？C++ QwtPlotItem::isVisible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QwtPlotItem的用法示例。
在下文中一共展示了QwtPlotItem::isVisible方法的6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: drawItems
void QwtPlot::drawItems(QPainter *painter, const QRect &rect,
const QwtScaleMap map[axisCnt],
const QwtPlotPrintFilter &pfilter) const
{
const QwtPlotItemList& itmList = itemList();
for ( QwtPlotItemIterator it = itmList.begin();
it != itmList.end(); ++it )
{
QwtPlotItem *item = *it;
if ( item && item->isVisible() )
{
if ( !(pfilter.options() & QwtPlotPrintFilter::PrintGrid)
&& item->rtti() == QwtPlotItem::Rtti_PlotGrid )
{
continue;
}
painter->save();
#if QT_VERSION >= 0x040000
painter->setRenderHint(QPainter::Antialiasing,
item->testRenderHint(QwtPlotItem::RenderAntialiased) );
#endif
item->draw(painter,
map[item->xAxis()], map[item->yAxis()],
rect);
painter->restore();
}
}
}示例2: drawItems
void QwtPlot::drawItems( QPainter *painter, const QRectF &canvasRect,
const QwtScaleMap maps[axisCnt] ) const
{
const QwtPlotItemList& itmList = itemList();
for ( QwtPlotItemIterator it = itmList.begin();
it != itmList.end(); ++it )
{
QwtPlotItem *item = *it;
if ( item && item->isVisible() )
{
painter->save();
painter->setRenderHint( QPainter::Antialiasing,
item->testRenderHint( QwtPlotItem::RenderAntialiased ) );
painter->setRenderHint( QPainter::HighQualityAntialiasing,
item->testRenderHint( QwtPlotItem::RenderAntialiased ) );
item->draw( painter,
maps[item->xAxis()], maps[item->yAxis()],
canvasRect );
painter->restore();
}
}
}示例3: initLegend
void Graph::initLegend()
{
QwtLegend *legend = new QwtLegend;
legend->setDefaultItemMode(QwtLegendData::Checkable);
insertLegend(legend, QwtPlot::BottomLegend);
connect(legend, SIGNAL(checked(QVariant,bool,int)), SLOT(showCurve(QVariant,bool,int)));
QwtPlotItemList l = this->itemList(QwtPlotItem::Rtti_PlotCurve);
for(int i = 0; i < l.size(); ++i)
{
QwtPlotItem *curve = l[i];
QVariant info = itemToInfo(curve);
QWidget *w = legend->legendWidget(info);
if(w && w->inherits("QwtLegendLabel"))
((QwtLegendLabel*)w)->setChecked(curve->isVisible());
}
}示例4: raiseItem
void Editor::raiseItem( QwtPlotShapeItem *shapeItem )
{
const QwtPlot *plot = this->plot();
if ( plot == NULL || shapeItem == NULL )
return;
const QwtPlotItemList items = plot->itemList();
for ( int i = items.size() - 1; i >= 0; i-- )
{
QwtPlotItem *item = items[ i ];
if ( shapeItem == item )
return;
if ( item->isVisible() &&
item->rtti() == QwtPlotItem::Rtti_PlotShape )
{
shapeItem->setZ( item->z() + 1 );
return;
}
}
}示例5: itemAt
QwtPlotShapeItem* Editor::itemAt( const QPoint& pos ) const
{
const QwtPlot *plot = this->plot();
if ( plot == NULL )
return NULL;
// translate pos into the plot coordinates
double coords[ QwtPlot::axisCnt ];
coords[ QwtPlot::xBottom ] =
plot->canvasMap( QwtPlot::xBottom ).invTransform( pos.x() );
coords[ QwtPlot::xTop ] =
plot->canvasMap( QwtPlot::xTop ).invTransform( pos.x() );
coords[ QwtPlot::yLeft ] =
plot->canvasMap( QwtPlot::yLeft ).invTransform( pos.y() );
coords[ QwtPlot::yRight ] =
plot->canvasMap( QwtPlot::yRight ).invTransform( pos.y() );
QwtPlotItemList items = plot->itemList();
for ( int i = items.size() - 1; i >= 0; i-- )
{
QwtPlotItem *item = items[ i ];
if ( item->isVisible() &&
item->rtti() == QwtPlotItem::Rtti_PlotShape )
{
QwtPlotShapeItem *shapeItem = static_cast<QwtPlotShapeItem *>( item );
const QPointF p( coords[ item->xAxis() ], coords[ item->yAxis() ] );
if ( shapeItem->boundingRect().contains( p )
&& shapeItem->shape().contains( p ) )
{
return shapeItem;
}
}
}
return NULL;
}示例6: drawItems
void QwtPlot::drawItems(QPainter *painter, const QRect &rect,
const QwtArray<QwtScaleMap> &map,
const QwtPlotPrintFilter &pfilter) const
{
painter->save();
const QwtPlotItemList& itmList = itemList();
for ( QwtPlotItemIterator it = itmList.begin();
it != itmList.end(); ++it )
{
QwtPlotItem *item = *it;
if ( item && item->isVisible() )
{
if ( !(pfilter.options() & QwtPlotPrintFilter::PrintGrid)
&& item->rtti() == QwtPlotItem::Rtti_PlotGrid )
{
continue;
}
#if QT_VERSION >= 0x040000
const QPaintEngine *pe = painter->device()->paintEngine();
if (pe->hasFeature(QPaintEngine::Antialiasing) )
{
painter->setRenderHint(QPainter::Antialiasing,
item->testRenderHint(QwtPlotItem::RenderAntialiased) );
}
#endif
item->draw(painter,
map[item->xAxis()], map[item->yAxis()],
rect);
}
}
painter->restore();
}