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profile: remove need for MainWindow when rendering the profile

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Very annoyingly, to render the profile for printing / export,
the profile still had to be show()n, thus requiring a parent
window.

Analysis of qmlprofile.c showed that this was due to the
transformation matrix not being properly set up on non-show()n
scenes.

Instead, we can simply render via the QGraphicsScene
(circumventing the QGraphicsView).

The code was factored out into the ProfileWidget2::draw()
function. This will hopefully make it easier to change
the size-code of the profile.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2021-05-06 14:45:09 +02:00 • committed by Dirk Hohndel
parent 13d4f595cb
commit b39e88b8c6
5 changed files with 51 additions and 48 deletions
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8
desktop-widgets/diveplanner.cpp
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@ -609,15 +609,11 @@ void PlannerWidgets::printDecoPlan()
painter.setRenderHint(QPainter::Antialiasing);
painter.setRenderHint(QPainter::SmoothPixmapTransform);
// TODO: Annoyingly, this still needs a parent window? Otherwise,
// the profile is shown as its own window, when calling show() below.
auto profile = std::make_unique<ProfileWidget2>(DivePlannerPointsModel::instance(), MainWindow::instance());
profile->show(); // Ominous: if the scene isn't shown, parts of the plot are missing. Needs investigation.
profile->resize(renderSize.toSize());
auto profile = std::make_unique<ProfileWidget2>(DivePlannerPointsModel::instance(), nullptr);
profile->setPlanState(&displayed_dive, 0);
profile->plotDive(&displayed_dive, 0, true, true);
profile->setPrintMode(true);
profile->render(&painter);
profile->draw(&painter, QRect(0, 0, pixmap.width(), pixmap.height()));
QByteArray byteArray;
QBuffer buffer(&byteArray);