General and Desktop

Since I'm actually using catkin tools on-top of cmake, some of the key things were as follows: list(APPEND CMAKE_PREFIX_PATH /opt/ros/$ENV{ROS_DISTRO}) list(APPEND CMAKE_PREFIX_PATH /opt/Qt5.12.2/5.12.2/gcc_64) find_package(Qt5 REQUIRED COMPONENTS Core Widgets Scxml ) #CMAKE_AUTOMOC does not work!! qt5_wrap_cpp(SCXML_MOC include/ros_scxml_state.h include/ros_scxml.h ) target_link_libraries(${PROJECT_NAME}_SM ${catkin_LIBRARIES} Qt5::Core Qt5::Scxml Qt5::Widgets )

@Zunneh you should look into QStandardPaths to get cross platform locations to write read and store data https://doc.qt.io/qt-5/qstandardpaths.html For why windows does not allow it, security reasons I would assume. Prevents mallware from messing with with importand programs. To be honest, Windows is a good bit behind on that compared to other os, on Mac for example each program is its own seperated sandbox. Very hard to break out of that 😉

@Annabela_Cortez Hi If you do like this ( the wrong way) GraphWidget *w = new GraphWidget(this); ui->setupUi(this); Then all kinds of widgets (if any in the UI) will be put on top of your GraphWidget. MainWindow has a special center widget called centralWidget() that will/might cover your widget when the order of insertion is wrong. Even if a widget is transparent, it will/might still eat mouse events. So rule is ui->setupUi(this); always comes first.

Is it possible to use (build) QtMEL library on Android? I need to record short *.mp4 videos with some OpenCV operations and your library looks really good. Could you please provide some tips for *.pro file or other settings?

Thanks for the explanation

@vale88 Ok. So, make it solved then.

Hello, I created the button with: button = new QPushButton(table->viewport()); and I update its position on the table to be after the last row each time a new row is inserted.

@JonB ok thank you

@NotYourFan What do you use for this function? I mean: is it a scripting language? JavaScript? Some custom format? ...?

@J-Hilk I have no clue what that strange thing could be since everything seems to be ok when using QApplication::closeAllWindows(). My form class instance is created on the stack.

@J.Hilk Wow so much help ! Thank you very much, thanks to you I have exactly what I was searching for :) Thanks a lot ! I put solved on the subject !

@aha_1980 yes online installer.

@Christian-Ehrlicher OK, thanks a lot, now I feel dump, I just copy/paste a code modifying the Create function but not the Construct, with this it actually works as expected: static void *Construct(void *where, const void *t) { if (!t) return new (where) MyClass(CREATE_DEFAULT_MY_CLASS()); return new (where) MyClass(*static_cast<const MyClass*>(t)); } Thanks again

@Pada_ nope. i dont have 5.4.

Great ! Then please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)

Hi, QRubberBand might be handy for that.