To any interested person , i've figured out that somehow linker when building project was using mings64 bit path and didn't see refferences so i changed manually folder name of mingw 64 bit and somehow qt decided that its time to use PATH of 32-bit version of mingw , then i changed again name of folder back to normall and now its working on 32 bit version and 64 bit version.
I used the page with screenshots and although height and width weren't automatically adjusted using the menu (when setting the values), but manually, the launch screen was properly centralized. I also suspect there will be a way to set a "launch screen" for Android too, but what I found was all of "splash screen" in lieu of "launch screen"on Android apps.
One strange thing throughout this succeeded iOS launch screen applying process was that I always get the error "xcodefaild" when I build the app using the iOS kit on Qt Creator. I'm not certain whether or not it takes place for other develpers and it's common for that stage.
first school computer use: DEC pdp-8 (via model33 teletype) and pdp-11 via la120 decwriter
Excellent --- someone must actually be older than me! :)
first president voted for: You guessed it....
Nah. the one who quoted the term "evil empire" to defer communism/socialism for another 30 years, while at the same time breaking organized labor in the US, and who looked cool as a muppet dressed as superman.
Because this is not what you usually do when dealing with mid-size to large datasets.
Say for the sake of argument you count the number of rows to provide pagination of some sort, which is a typical case. You count, init the pages' count, current page number or w/e and then retrieve only a single small result set from the table. Right, so you count all relevant records just for the simple paging.
Now, this is okay most of the time, at the end of the day that's why you have a database server (or engine, or w/e) - to provide storage. It gets a bit more involved when you have concurrent transactions over complex queries, however; i.e. you have snapshots all over the place.
Say you count the rows of a query that has a nested query and altogether them queries span 8-10 tables over some JOINs. The count can get real expensive in these cases, especially if you consider why you do it to begin with - to fetch some meta information about the dataset and just provide some small part of it afterwards as actual data. That's what I referred to in my tease.
1st, you have to make sure it works with simplest demo apps, provided
then define, why exactly you want to reuse Qt and ask that questions here (f.ex. how to utilize Qt's feature <name of the feature> best for lidar?)
please, pay attention that baudrate of your lidar not compatible with RPi HW, so you have to use USB->Serial adapter, provided with the lidar
void QTableView::sortByColumn(int column, Qt::SortOrder order)
if (column < 0)
// If sorting is enabled it will emit a signal connected to
// _q_sortIndicatorChanged, which then actually sorts
// If sorting is not enabled, force to sort now
// this sort function is called from
//QAbstractItemModel so do nothing. See hereunder function
Sorts the model by \a column in the given \a order.
The base class implementation does nothing.
void QAbstractItemModel::sort(int column, Qt::SortOrder order)
// do nothing
QTableView::sortByColumn fuction If sorting is enabled it will emit a signal connected to
_q_sortIndicatorChanged, which then actually sorts or If sorting is not enabled, force to sort now but if only the sort function in QAbstractItemModel::sort is overloaded and the body of the function has a code which sort, or you have customized QSortFilterProxyModel which has the sort function and the function is called when you click the header column arrow but not sorts when you setData from tableView level.
if QTableView::setSortingEnabled(false) the header column arrow for descending or ascending sorting is not seen so there is no posibility to sort from the level of TableView.
@JonB I know that it can be not so readable for everybody but since I have been working on my soft from allmost 8 monthes I am used to such long lines of code :-)). Usually I devided such a long lines of code like this:
auto magazynToBeRemoved = model->GetcMagazynVect().at(cFilterProxyModel->GetVectMagazynFilterProxyModel().at(index)->
I have problems with Maintenance tools since several weeks too. Everything downloads with 60-160 KiB speed, on 500 Mbps internet, both on Windows 10, and MacOs. Even if I remove Qt completely, and try to make fresh install.
Casting data wildly is a good way of getting bugs that might be extremely hard to track down. I'd suggest that you instead store your private data in an external array and pass an index to the array, much safer than using a bigger hammer. Ie for example:
(With whatever size of n you'll need).
So you send the index to the right pointer in the call and avoid the whole mess of casting the pointer to an integer, which will be platform dependant.
Thank you so much. It's an exact answer to the question as posed by you. And follows on from the time I spent trying to answer your earlier questions. I haven't insulted you so far in your questions, thanks for insulting me. You are rude. I'm done with you, find out how people will respond to you, given that this support forum provides voluntary help....
Yes, PositionGroupbox derive from QWidget directly. But What does it matter?
It matters quite a lot. QWidget is not thread-safe and it's not reentrant. You can't touch anything QWidget-y outside the GUI thread, including creating the actual object. Failing to observe this is a race condition and ultimately a bug. That is to say, you have bigger problems than a syntax error.
When does this error show up? During compilation? Linking? Or when you try to run the executable?
I think the issue is that Qt version installed in your system is different from one ThinClient is linked against. If you have your AppImage binary created already - run that instead of ThinClient file itself.
Why is the current user name unknown? If your app is running on a machine, there is always an active (logged-in) user. If you are planning to read / write data to other user's homedir, you need to know their names or you use every subfolder in "C:\Users...."
Why are you using QString, but dont want to use QFile or QStandardPath?
Btw, like @JonB already said, QStandardPath provides PathVariables that will lead to your destination:
@Christian-Ehrlicher And sure enough that was it. Thanks Christian! I thought that, by default, it was just going to ask for strings for each "role" of each element, with the roles basically being equivalent to columns. I didn't really care if it showed the same string for every role, but if it got a string it didn't understand for the Decoration role... I see where that might disrupt the whole display.
QStandardItemModel is a convenience function which should be filled with QStandardItem::data()/setData(). If you mix it with QAbstractItemView::setData() then you also should use the corresponding QAIV::data() function.
I got solution for this issue. I got dump for environment variable from application. They were different in both case(on boot-up and from terminal). I just exported that variables in my script and output was as per exception. Thank you every one for support and valuable time.
@Kent-Dorfman Thanks for the suggestion, but would this approach work if I need to read from and write to the process?
All the .dll dependencies are in C:\windows\system32 and I checked both the path variable and the environment of the process and it's present in both
Solution found for MacOS and iOS.
It's might be working well for another platforms. I haven't tested it yet.
Every library that is using by libzip should be added manually to the QT project and if it's not by default in the system you need to build it like static. If there zlib - then add it manually, if there SSL - then add it manually, etc
The step-by-step guidance for building libzip published by me on Github
There are couple of strange things that I found (I don't know the cause of it):
In the directory where located library appeared couple of symlinks on the real shared library file when I am attaching it to QT project via symlinks it's not working, only direct original file attaching to project working well (it's mean important for attaching zlib from system folder). See the screenshot
The libzip library only working when you attaching it to QT Project like statical library (*.a), all of attempts of using like shared/dynamic libraray (*.dylib) have got failed, even it's installed like the operational system part.
I did not use the Qbuffer because on the client I am not able to integrate it, but if I use it on the server side and on the client no the data is received the same. How does it look? We accept suggestions!
You should check the bug report system to see if there's already something related to this. If not please open a new report providing a minimal compilable example as well as your findings so that it can be fixed.
I agree also that basically it is in the prerequisites.
However IMHO it is dangerous to have such an ambiguos statement as latest available version of NDK in the document. It might be true for the moment, but may change any time.
Therefore, I am positing the actual versions I am currently using.