本文整理汇总了C++中QGraphicsItem::hide方法的典型用法代码示例。如果您正苦于以下问题：C++ QGraphicsItem::hide方法的具体用法？C++ QGraphicsItem::hide怎么用？C++ QGraphicsItem::hide使用的例子？那么恭喜您, 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QGraphicsItem的用法示例。
在下文中一共展示了QGraphicsItem::hide方法的2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: hideAllItemsExceptImage
void GraphicsScene::hideAllItemsExceptImage()
{
LOG4CPP_INFO_S ((*mainCat)) << "GraphicsScene::hideAllItemsExceptImage";
for (int index = 0; index < QGraphicsScene::items().count(); index++) {
QGraphicsItem *item = QGraphicsScene::items().at(index);
if (item->data (DATA_KEY_GRAPHICS_ITEM_TYPE).toInt() == GRAPHICS_ITEM_TYPE_IMAGE) {
item->show();
} else {
item->hide();
}
}
}示例2: reinitializeDisplayedItemPosition
void SunMenuItemView::reinitializeDisplayedItemPosition()
{
qint32 maxWidth = width();
qint32 maxHeight;
QGraphicsItem* gi = displayedItem()->graphicsItem();
//default
gi->resetTransform();
// Calculate maxHeight as smaller chord(only for small sweepLengths)
if (sweepLength() <= 90)
{
qreal biggerChord = 2 * (innerRadius() + maxWidth)
* /*qAbs*/(qSin((M_PI / 180) * sweepLength() / 2));
qreal smallerChord = 2 * innerRadius()
* /*qAbs*/(qSin((M_PI / 180) * sweepLength() / 2));
maxHeight = (0.2 * smallerChord + 1.4 * biggerChord) / 2;
}
else
maxHeight = displayedItem()->maximumHeight();
//hide item if it too small
if (maxWidth < 10 || maxHeight < 5)
{
gi->hide();
return;
}
QRectF graphicsItemRect;
if (sweepLength() == 360 && innerRadius() == 0)
{
displayedItem()->setMaximumSize(2 * maxWidth /*diameter*/, maxHeight);
graphicsItemRect = gi->boundingRect();
gi->setPos(-graphicsItemRect.width() / 2,
-graphicsItemRect.height() / 2);
gi->show();
return;
}
displayedItem()->setMaximumSize(maxWidth - 10, maxHeight);
graphicsItemRect = gi->boundingRect();
/////////////////////////////////////////////////////////////////////////////////
//positioning mDisplayedItem (rotation and coordinates).
qreal rotationAngle = startAngle() + sweepLength() / 2;
// Getting distance and angle (polar coordinates) + some centering adjustments
// We assume that (0,0) item's coordinate is it's top left corner
//(like QGraphicsSimpleTextItem and QGraphicsProxyWidget).
qreal angle, distance;
if (rotationAngle >= 270 || rotationAngle <= 90)
{
distance = innerRadius() + maxWidth / 2 - graphicsItemRect.width() / 2;
angle = rotationAngle
+ (180 / M_PI)
* qAtan(graphicsItemRect.height() / (2 * distance));
}
else
{
distance = innerRadius() + maxWidth / 2 + graphicsItemRect.width() / 2;
angle = rotationAngle
- (180 / M_PI)
* qAtan(graphicsItemRect.height() / (2 * distance));
rotationAngle -= 180;
}
gi->setPos(distance * qCos((M_PI / 180) * angle),
-distance * qSin((M_PI / 180) * angle));
gi->setRotation(-rotationAngle); //minus - because this function rotates clockwise.
gi->show();
///////////////////////////////////////////////////////////////////////////////////
}