Brainstorm

@BeastBook

ID = "+36+" and not working with with this "'+36+'" .I am little confused it worked with ' ' when i use for editing updating inserting but not for searching

Your ID column holds an integer, not a SQL string. You should not be quoting it (inside ''s) whether in a WHERE or INSERT or UPDATE, then you won't have consistency issues.

Hi,

While it could be interesting to play with the examples live, it would make the documentation way heavier to build and store.

what is your suggestion about server app design ?

People usually refer to "server app" as "middleware" or "web application". There are tons of web frameworks and ORMs for various languages including Java and C# on "enterprise" side and scripting languages (pphp, python, perl, ruby, node.js). C++ is not really convenient language here. As for protocol, if you are not pursuing real-time data processing with lowest possible latency, it makes sense to use REST API on top of HTTP, so that on server side you have the most typical "web app" with ORM inside and REST outside, and on client side you can easily add web client if needed, and even if not, you get some additional convenience as compared to e.g. RPC over plain TCP

@SeppyQT said in Adding other Project to Qt like PoDoFo (LGPL):

Isn't pdfium made by Google?

It is, so in order to contribute you'll have to comply to their terms, and maintain your code as well

@Konstantin-Tokarev
Crikey, are we not supposed to use DIVs for layout any more? I'm only just getting off TABLEs....

#!/usr/bin/env python import sys from PyQt5.QtWidgets import QApplication from PyQt5.QtWidgets import QWidget if __name__ == "__main__": app = QApplication(sys.argv) widget = QWidget() widget.show() sys.exit(app.exec_())

@VRonin said in want to add a graphic to a table:

One more note: This QAbstractItemView *view = qobject_cast<QAbstractItemView *>(parent()); is unsafe as hell. Nothing says the delegate should be a child of the view. in fact you can use the same delegate in multiple views. the correct way to get the model is index.model() without passing from the view

Thanks for signaling the issue. I have fixed my sample code above.

@JonB said in What approach do you take for dialogs where an action is to be performed?:

Invoker is a page with multiple buttons, each one leading to an action/dialog. There is no room/clarity to start having that offer sub-options etc.

Something like QToolBox can help. It can show every available "action", yet only expose the buttons + parameters of one action at any given time time.

There are examples in the documentation you should explore. On possibility is:

QString myStringArgument = "whatever it is"; QSqlQuery query; if (!query.prepare("INSERT INTO tableName (columnName) VALUES (?)")) ; // Handle error query.addBindValue(myStringArgument); if (!query.exec()) ; // Handle error

Thanks, Konstantin. I'll keep that in mind for future projects.

You can use C++/CLI (that is C++ building for CLR) to build a simple wrapper on the unmanaged C++ code that can be exposed directly to C#. If you want an example of exposing a Qt API to .Net you can check here

What undefined reference ?

@sierdzio Thank you. I am following the most-recently-updated instructions from here

I tried removing exclusion of qt gui but my error persists

In that case, defines won't help. You can put that path in variable to reuse in your different calls.

In any case, I would recommend to rather generate a header file using QMAKE_SUBSTITUTE like described in this wiki entry. IIRC, this variable is going to get documented in the next Qt release but is already usable since some time now.

This will simplify your life and avoid having to generate string defines for all the possible shell that you are going to use.

@arkadiusz97
That could also show of database usage.
So not bad idea, IMHO

@J.Hilk said in Signal/Slot design philosophy:

WHAT!? Do tell, I'm unaware of that feature.

Debug > Operate by Instruction

Unless you had something else in mind.

@davidspen
From exactly what you say in your question, I would not have answered it as @sierdzio has. (Unless there is something special about "if you are inside an AppImage package", I don't know about that.)

How/where do you launch your Qt executable from?

You say

I would like the current working directory of my program to be the directory in which I am with my terminal (ie. the result of the pwd command).

If you go into a terminal and type the name of an executable to run, which is then found via a symbolic link in your ~/bin which is on your PATH, that will not change the current directory. It will remain whatever it was in the terminal you launched it from. Which is what you say you want. And what QDir::currentPath() should already be delivering you:

Returns the absolute path of the application's current directory. The current directory is the last directory set with QDir::setCurrent() or, if that was never called, the directory at which this application was started at by the parent process.

In that case I would ask why it is not already correct?

If you instead want something about the directory the executable is actually in, or you run it in a different way, that's a different question?

@pokey That could be interesting.

Hi and welcome to devnet,

If you want to discuss development one of the best place would be the development mailing list. You’ll find there Qt’s developers/maintainers. This forum is more user oriented.

Hi @Larvae, you might get better answers to questions about internal code and design decisions at the Interest mailing list (subscribe first, then post). Qt engineers are active on that list; this forum is mainly used by Qt users who don't necessarily know any internal details.