void PageGraphicsItem::paint (QPainter *painter,
const QStyleOptionGraphicsItem *option, QWidget *w)
{
if (Invalid_ && IsDisplayed ())
{
auto backendObj = Doc_->GetBackendPlugin ();
if (qobject_cast<IBackendPlugin*> (backendObj)->IsThreaded ())
{
if (!RenderFuture_)
RequestThreadedRender ();
auto size = Doc_->GetPageSize (PageNum_);
size.rwidth () *= XScale_;
size.rheight () *= YScale_;
QPixmap px (size);
px.fill ();
setPixmap (px);
}
else
{
const auto& img = Doc_->RenderPage (PageNum_, XScale_, YScale_);
setPixmap (QPixmap::fromImage (img));
}
Invalid_ = false;
Core::Instance ().GetPixmapCacheManager ()->PixmapChanged (this);
}
QGraphicsPixmapItem::paint (painter, option, w);
Core::Instance ().GetPixmapCacheManager ()->PixmapPainted (this);
}
void PageGraphicsItem::ClearPixmap ()
{
auto size = Doc_->GetPageSize (PageNum_);
size.rwidth () *= XScale_;
size.rheight () *= YScale_;
setPixmap (QPixmap (size));
Invalid_ = true;
}
void ShareUserGroupWidget::slotAdjustScrollWidgetSize()
{
QScrollArea *scrollArea = _ui->scrollArea;
if (scrollArea->findChildren<ShareWidget*>().count() <= 3) {
auto minimumSize = scrollArea->widget()->sizeHint();
auto spacing = scrollArea->widget()->layout()->spacing();
minimumSize.rwidth() += spacing;
minimumSize.rheight() += spacing;
scrollArea->setMinimumSize(minimumSize);
}
}
int countNodes(TreeNode* root) {
if (root == NULL)
return 0;
int leftHeigth = lheight(root->left);
int rightHeight = rheight(root->right);
if (leftHeigth == rightHeight) //可以快速判断是满完全二叉树
return pow(2, leftHeigth + 1) - 1;
else// if (leftHeigth > rightHeight){ //并非满完全二叉树
return countNodes(root->left) + countNodes(root->right) + 1;
//}
//else if (leftHeigth < rightHeight) //对于完全二叉树而言，不会出现这种情况
}
QImage DocumentAdapter::RenderPage (int page, double xScale, double yScale)
{
const auto& size = Doc_->pageSize ();
auto imgSize = size.toSize ();
imgSize.rwidth () *= xScale;
imgSize.rheight () *= yScale;
QImage image (imgSize, QImage::Format_ARGB32);
image.fill (Qt::white);
QRectF rect (QPointF (0, 0), size);
rect.moveTop (rect.height () * page);
QPainter painter;
painter.begin (&image);
painter.scale (xScale, yScale);
painter.translate (0, rect.height () * (-page));
Doc_->drawContents (&painter, rect);
painter.end ();
return image;
}
QImage Document::RenderPage (int index, double xRes, double yRes)
{
auto page = spectre_document_get_page (SD_, index);
auto rc = spectre_render_context_new ();
auto size = GetPageSize (index);
spectre_render_context_set_scale (rc, xRes, yRes);
size.rwidth () *= xRes;
size.rheight () *= yRes;
unsigned char *data = 0;
int rowLength = 0;
spectre_page_render (page, rc, &data, &rowLength);
spectre_render_context_free (rc);
spectre_page_free (page);
const QImage& img = rowLength == size.width () * 4 ?
QImage (data, size.width (), size.height (), QImage::Format_RGB32) :
QImage (data, rowLength / 4, size.height (), QImage::Format_RGB32)
.copy (0, 0, size.width (), size.height ());
free (data);
return img;
}
QSize PreviewContentWidget::getTextBubbleSize() const
{
auto bubbleSize = getTextSize();
const auto textHeight = bubbleSize.height();
bubbleSize.setHeight(
std::max(
Ui::MessageStyle::getBubbleHeight(),
textHeight
)
);
bubbleSize.setHeight(
Utils::applyMultilineTextFix(textHeight, bubbleSize.height())
);
bubbleSize.rwidth() += Ui::MessageStyle::getBubbleHorPadding();
bubbleSize.rwidth() += Ui::MessageStyle::getBubbleHorPadding();
bubbleSize.rwidth() += Ui::MessageStatusWidget::getMaxWidth();
bubbleSize.rheight() += getBubbleVertPadding();
return bubbleSize;
}
