> On Oct. 2, 2016, 12:33 p.m., Martin Tobias Holmedahl Sandsmark wrote: > > maybe try with installEventFilter(qApp) in the presentation widget, > > override eventFilter() and check for the tablet events in > > PresentationWidget and call setCursor(Qt::BlankCursor) and unsetCursor(). > > > > you could also call setOverrideCursor() and unsetOverrideCursor() in your > > custom QApplication, but then it's tricky to track when the presentation > > widget is used and I'd prefer not having a new application class just for > > this.
What sandsmark says try installing an event filter, the syntax of what he suggested is wrong, what you want is not installEventFilter(qApp) but qApp->installEventFilter(this), with this being the presentationwidget. - Albert ----------------------------------------------------------- This is an automatically generated e-mail. To reply, visit: https://git.reviewboard.kde.org/r/128858/#review99709 ----------------------------------------------------------- On Sept. 7, 2016, 8:18 p.m., Oliver Sander wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://git.reviewboard.kde.org/r/128858/ > ----------------------------------------------------------- > > (Updated Sept. 7, 2016, 8:18 p.m.) > > > Review request for Okular. > > > Repository: okular > > > Description > ------- > > I am trying to fix the following papercut: I regularly write on pdf files in > presentation mode, using the pen that comes with my Lenovo ThinkPad Yoga. > When I approach the screen with the pen, the cursor appears, and it follows > the pen tip during writing. When I lift off the pen, the cursor stays on, > and auto-hides only a few seconds later (because of > Okular::Settings::EnumSlidesCursor::HiddenDelay). As a consequence, the > cursor frequently hides the last bits of what I have just written. This is a > nuisance, because I do this in front of an audience, and a lot of it is math > (where every detail matters). > > Ideally, the cursor would auto-hide when I lift the pen off the screen. > Luckily, Qt has an event for this: QEvent::TabletLeaveProximity. Unluckily, > the documentation says (http://doc.qt.io/qt-5/qtabletevent.html): > > "TabletEnterProximity and TabletLeaveProximity events [...] are only sent to > QApplication" > > Therefore, this patch introduces a new class TabletApplication, which > inherits from QApplication, and is used in main.cpp instead of QApplication. > The proximity events are really caught, and each time a short note is printed > on the console. > > Unfortunately, at this point I am stuck and need some help. Apparently, I > cannot control the cursor from a QApplication. How do I get the information > that a TabletProximity has been caught to the presentation widget? Maybe the > answer is trivial, but I have very little Qt programming experience. Thanks > for your help! > > > Diffs > ----- > > shell/CMakeLists.txt 84cbf2d > shell/main.cpp 856d2b0 > shell/tabletapplication.h PRE-CREATION > shell/tabletapplication.cpp PRE-CREATION > > Diff: https://git.reviewboard.kde.org/r/128858/diff/ > > > Testing > ------- > > > Thanks, > > Oliver Sander > >
