General and Desktop

@jsulm Why I am intervening to (try to) explain what the OP is saying/wants, I don't know! But I have been following this thread.... I believe he is saying: He wants a lookup table for string values. The key is to be the string; the value is irrelevant. The strings (which themselves are unique) come in a variety of "internal formats" (std::string, QString, char *, others). He is proposing to convert them all to QLatin1String to store as the key for lookup. He has thousands of such strings. He is concerned both about the storage requirement for the strings as keys in the hash table, and more particularly about the speed of look up (hence questions about needing to convert a string to be sought to QLatin1String each time it needs to be looked up. Something like that anyway!

Thank you very much!!! That was!!

@amarism Not sure what exactly the problem is. I guess you have a widget in the red area? Put you grid layout inside this widget. Then create widgets you need and add them to the grid layout.

You need to build that entire source and create library. lib zip does not provide the pre-compiled libraries. Just build on your own and use it.

Hi and welcome to devnet, It's the style sheet that triggers that as the widget is rendered through a different style and doesn't follow the system style anymore.

Again: what about the stack trace ?

Hi, Can you explain the need of BlockingQueuedConnection in your case ?

@SGaist I rebuilt the RocksDB library and added a flag to not use tcmalloc. It no longer shows up when I run ldd. But when I run ldd on my basic app, it is loaded there. Not sure why or how. But still get the same crash. I have tried to use LD_PRELOAD to load tcmalloc and jemalloc separately. Neither had any effect. I am now trying to learn how to use GDB to debug the static init code that runs before main to see if I can follow what is happening. I know it is a lot to ask, but if anyone can try to build a RocksDB app with Qt on Linux I would really appreciate it. And as I have done, no code calling RocksDB is necessary. Just include a RocksDB .h file.

@JonB Exact. It is a bit tangled. I need to know the volume of information, by flash drive inserted in the pc. It is not necessary for the user to know that the new file was registered in the application, only those who have the administration password of the application should know it, when they open it. The OS is Windows.

@VRonin Ah. I believe the user described the interface he gets currently (with his QTableView). Whether he likes it or not is a different matter. Then his question was: how does he get a notification when, having created a new row, it is actually sent to the database for INSERT, given that there is no signal for this in his case ("editStrategy is OnFieldChange"). My overriding QSqlTableModel::insertRowIntoTable() is how to achieve that. So yours is to do with the interface for adding a new row, right? Whether he would benefit/prefer to change over to that to I cannot say :)

@RahibeMeryem said in qmqtt auto reconnect on disconnet: I am confused qmqtt in thread and connecting signal slot inside that thread also to check connection and re-connect As I said you can connect signals slots across threads

Thank you very much for that tip!

@VRonin said in How to hide the content from a directory in QFileSystemModel: subclass QFileSystemModel Or subclass QIdentityProxyModel, modify it as you want (i.e. what the fellows above suggested) and attach it to the standard QFileSystemModel.

@JonB said in How to set the spacing of toolbar's actions?: QToolButton use QToolButton{margin: 0px 10px;}, it works.... thanks very much.

OP reporting the results of the invistigation ) Actualy, I need to use Range.Find with whole match. In VB it will be like this cell = someRange.Find("something", LookAt:=xlWhole) In Qt it will be like this QAxObject* MainWindow::findCell(QAxObject* range, QString what) { QAxObject* firstCell; firstCell = range->querySubObject("Cells(1,1)"); return range->querySubObject("Find(const QString&, " + "const QVariant&," + "int, " + "int)", what, firstCell->asVariant(), -4163, 1); } ... cell = findCell(someRange, "something"); By the way. Result: first part match range->querySubObject("Find(const QString&, const QVariant&)", what, firstCell->asVariant()); Result: still first part match range->querySubObject("Find(const QString&, const QVariant&, xlValues, xlWhole)", what, firstCell->asVariant()); Result: still first part match range->querySubObject("Find(const QString&, const QVariant&, -4163, 1)", what, firstCell->asVariant()); Result: NULL range->querySubObject("Find(const QString&, const QVariant&, const QString&, const QString&)", what, firstCell->asVariant(), "xlValues", "xlWhole")) Result: NULL range->querySubObject("Find(const QString&, const QVariant&, int, int)", what, firstCell->asVariant(), -1, 1);

@JonB said in QHelpEngine: Or, does the code at https://github.com/srish/QtHelpManual/blob/master/main.cpp (a) work and (b) help you? I tried this and it almost works. Almost because only the root link from the index view is working, then I have to use links from the content view to navigate. Links under the root item (children) are not working from the index view and clicking on them add error messages in output: QFSFileEngine::open: No file name specified QTextBrowser: No document for qthelp://org.qt-project.examples.simpletextviewer/doc/./openfile.html When using my own documentation .qhc file, nothing is displayed. So I definitely didn't catch the logic here. I guess I will stay with Doxygen for documentation.