本文整理汇总了C++中QPolygon::subtracted方法的典型用法代码示例。如果您正苦于以下问题：C++ QPolygon::subtracted方法的具体用法？C++ QPolygon::subtracted怎么用？C++ QPolygon::subtracted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QPolygon的用法示例。
在下文中一共展示了QPolygon::subtracted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: highlightItems
void OverviewDockWidget::highlightItems(QList<OwlClass *> cls)
{
if(this->highlightpolygon!=NULL)m_scene->removeItem(highlightpolygon);
QColor grey(0, 0, 0, 60);
QPolygon polygon = QPolygon(m_scene->sceneRect().toRect());
for(int i=0;i<cls.size();i++){
double x = cls[i]->overviewshape->pos().rx() - 10;
double y = cls[i]->overviewshape->pos().ry() - 10;
QRectF viewRect = QRectF(x,y,20,20);
polygon = polygon.subtracted(QPolygon(viewRect.toRect()));
}
highlightpolygon = m_scene->addPolygon(polygon,QPen(Qt::transparent),QBrush(grey));
lines.append(highlightpolygon);
}示例2: drawSpace
// ////////////////////////////Drawing the inactive intersection space////////////////////////////////////
void LvlScene::drawSpace()
{
const long padding = 400000;
WriteToLog(QtDebugMsg, QString("Draw intersection space-> Find and remove current"));
foreach(QGraphicsItem * spaceItem, items())
{
if(spaceItem->data(0).toString()=="Space")
{
removeItem(spaceItem);
delete spaceItem;
continue;
}
if(spaceItem->data(0).toString()=="SectionBorder")
{
removeItem(spaceItem);
delete spaceItem;
continue;
}
}
QPolygon bigSpace;
QGraphicsItem * item;
QGraphicsItem * item2;
QVector<QPoint > drawing;
int i, j;
long l, r, t, b;
//x, y, h, w;
WriteToLog(QtDebugMsg, QString("Draw intersection space-> Find minimal"));
j=-1;
do
{
j++;
l = LvlData->sections[j].size_left;
r = LvlData->sections[j].size_right;
t = LvlData->sections[j].size_top;
b = LvlData->sections[j].size_bottom;
}
while(
((LvlData->sections[j].size_left==0) &&
(LvlData->sections[j].size_right==0) &&
(LvlData->sections[j].size_top==0) &&
(LvlData->sections[j].size_bottom==0)) && (j<LvlData->sections.size())
);
for(i=0; i<LvlData->sections.size(); i++)
{
if(
(LvlData->sections[i].size_left==0) &&
(LvlData->sections[i].size_right==0) &&
(LvlData->sections[i].size_top==0) &&
(LvlData->sections[i].size_bottom==0))
continue;
if(LvlData->sections[i].size_left < l)
l = LvlData->sections[i].size_left;
if(LvlData->sections[i].size_right > r)
r = LvlData->sections[i].size_right;
if(LvlData->sections[i].size_top < t)
t = LvlData->sections[i].size_top;
if(LvlData->sections[i].size_bottom > b)
b = LvlData->sections[i].size_bottom;
}
WriteToLog(QtDebugMsg, QString("Draw intersection space-> Draw polygon"));
drawing.clear();
drawing.push_back(QPoint(l-padding, t-padding));
drawing.push_back(QPoint(r+padding, t-padding));
drawing.push_back(QPoint(r+padding, b+padding));
drawing.push_back(QPoint(l-padding, b+padding));
drawing.push_back(QPoint(l-padding, t+padding));
bigSpace = QPolygon(drawing);
l = LvlData->sections[LvlData->CurSection].size_left;
r = LvlData->sections[LvlData->CurSection].size_right;
t = LvlData->sections[LvlData->CurSection].size_top;
b = LvlData->sections[LvlData->CurSection].size_bottom;
WriteToLog(QtDebugMsg, QString("Draw intersection space-> Draw editing hole"));
drawing.clear();
drawing.push_back(QPoint(l-1, t-1));
drawing.push_back(QPoint(r+1, t-1));
drawing.push_back(QPoint(r+1, b+1));
drawing.push_back(QPoint(l-1, b+1));
drawing.push_back(QPoint(l-1, t-1));
bigSpace = bigSpace.subtracted(QPolygon(drawing));
WriteToLog(QtDebugMsg, QString("Draw intersection space-> add polygon to Item"));
item = addPolygon(bigSpace, QPen(Qt::NoPen), QBrush(Qt::black));//Add inactive space
item2 = addPolygon(QPolygon(drawing), QPen(Qt::red, 2));
item->setZValue(spaceZ1);
//.........这里部分代码省略.........