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Printing: don't break dives into successive pages

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While rendering a template with "0" dives per page value, try to fit
as many dives per page but don't break a dive into 2 pages.

Use a dynamically sized view port to fit the rendered area only,
and don't render the full page.

All the Template elements that shouldn't be broken should have
the CSS class "dontbreak".

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Gehad elrobey <gehadelrobey@gmail.com>
This commit is contained in:
Gehad elrobey 2015-08-13 23:23:07 +02:00 • committed by Lubomir I. Ivanov
parent 31df69c401
commit 6a9c4cb9d7
2 changed files with 43 additions and 2 deletions
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44
printer.cpp
View file

@ -57,6 +57,46 @@ void Printer::putProfileImage(QRect profilePlaceholder, QRect viewPort, QPainter
}
}
void Printer::flowRender()
{
// render the Qwebview
QPainter painter;
QRect viewPort(0, 0, 0, 0);
painter.begin(paintDevice);
painter.setRenderHint(QPainter::Antialiasing);
painter.setRenderHint(QPainter::SmoothPixmapTransform);
// get all references to dontbreak divs
int start = 0, end = 0;
int fullPageResolution = webView->page()->mainFrame()->contentsSize().height();
QWebElementCollection dontbreak = webView->page()->mainFrame()->findAllElements(".dontbreak");
foreach (QWebElement dontbreakElement, dontbreak) {
if ((dontbreakElement.geometry().y() + dontbreakElement.geometry().height()) - start < pageSize.height()) {
// One more element can be placed
end = dontbreakElement.geometry().y() + dontbreakElement.geometry().height();
} else {
QRegion reigon(0, 0, pageSize.width(), end - start);
viewPort.setRect(0, start, pageSize.width(), end - start);
// render the base Html template
webView->page()->mainFrame()->render(&painter, QWebFrame::ContentsLayer, reigon);
// scroll the webview to the next page
webView->page()->mainFrame()->scroll(0, dontbreakElement.geometry().y() - start);
// rendering progress is 4/5 of total work
emit(progessUpdated((end * 80.0 / fullPageResolution) + done));
static_cast<QPrinter*>(paintDevice)->newPage();
start = dontbreakElement.geometry().y();
}
}
// render the remianing page
QRegion reigon(0, 0, pageSize.width(), end - start);
webView->page()->mainFrame()->render(&painter, QWebFrame::ContentsLayer, reigon);
painter.end();
}
void Printer::render(int Pages = 0)
{
// keep original preferences
@ -175,11 +215,11 @@ void Printer::print()
int paddingBottom = pageSize.height() - (webView->page()->mainFrame()->contentsSize().height() % pageSize.height());
QString styleString = QString::fromUtf8("padding-bottom: ") + QString::number(paddingBottom) + "px;";
webView->page()->mainFrame()->findFirstElement("body").setAttribute("style", styleString);
Pages = ceil(webView->page()->mainFrame()->contentsSize().height() / (float)pageSize.height());
flowRender();
} else {
Pages = ceil(getTotalWork(printOptions) / (float)divesPerPage);
}
render(Pages);
}
}
void Printer::print_statistics()

1
printer.h
View file

@ -29,6 +29,7 @@ private:
int done;
int dpi;
void render(int Pages);
void flowRender();
void putProfileImage(QRect box, QRect viewPort, QPainter *painter, struct dive *dive, QPointer<ProfileWidget2> profile);
private slots: