void BasicBlockItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget /*= 0*/)
{
if (_needRepaint == true || _width == 0.0 || _height == 0.0)
{
_cache = QPixmap(QSize(_width, _height));
QPainter cachedPainter(&_cache);
paintBackground(cachedPainter);
cachedPainter.setRenderHint(QPainter::TextAntialiasing);
paintText(cachedPainter);
_needRepaint = false;
}
painter->drawPixmap(0, 0, _cache);
}
void paintEvent(QPaintEvent *)
{
QSize layoutSize(75, 75);
QPainter widgetPainter(this);
widgetPainter.fillRect(QRect(QPoint(0, 0), this->size()), Qt::gray);
{
const qreal devicePixelRatio = this->windowHandle()->devicePixelRatio();
QPixmap cache(layoutSize * devicePixelRatio);
cache.setDevicePixelRatio(devicePixelRatio);
QPainter cachedPainter(&cache);
cachedPainter.fillRect(QRect(0,0, 75, 75), Qt::blue);
cachedPainter.fillRect(QRect(10,10, 55, 55), Qt::red);
cachedPainter.drawEllipse(QRect(10,10, 55, 55));
QPainter widgetPainter(this);
widgetPainter.drawPixmap(QPoint(10, 10), cache);
}
{
const qreal devicePixelRatio = this->windowHandle()->devicePixelRatio();
QImage cache = QImage(layoutSize * devicePixelRatio, QImage::Format_ARGB32_Premultiplied);
cache.setDevicePixelRatio(devicePixelRatio);
QPainter cachedPainter(&cache);
cachedPainter.fillRect(QRect(0,0, 75, 75), Qt::blue);
cachedPainter.fillRect(QRect(10,10, 55, 55), Qt::red);
cachedPainter.drawEllipse(QRect(10,10, 55, 55));
QPainter widgetPainter(this);
widgetPainter.drawImage(QPoint(95, 10), cache);
}
}
void DisassemblyView::paintEvent(QPaintEvent * evt)
{
if (_needRepaint == true)
{
_cache = QPixmap(viewport()->size());
QPainter cachedPainter(&_cache);
paintBackground(cachedPainter);
paintSelection(cachedPainter);
cachedPainter.setRenderHint(QPainter::TextAntialiasing);
cachedPainter.setFont(font());
paintText(cachedPainter);
_needRepaint = false;
}
QPainter p(viewport());
p.drawPixmap(0, 0, _cache);
paintCursor(p);
}
