gui not showing, or closing to fast to see

[JonB]

@micha_eleric
You have several things wrong. Whether they cause the crash I don't know, but let's start by sorting them out....

Remove your try ... catch. Qt does not throw C++ exceptions, and if you have a coding error/"crash" it won't catch it anyway.

ui->pushButton_22->connect(ui->pushButton_22, &QPushButton::clicked, this, &CGUI::Btn_test_clicked); //?? new qt5

@Pl45m4 already said this is wrong. You want:

connect(ui->pushButton_22, &QPushButton::clicked, this, &CGUI::Btn_test_clicked);    //?? new qt5

Before

ui->textEdit_40->setFixedSize(30,  30);
ui->textEdit_41->setFixedSize(30,  30);

let's put in something like:

qDebug() << ui->textEdit_40 << ui->textEdit_41;
// if previous line not acceptable to compiler remove it
qDebug() << ui->textEdit_40->objectName() << ui->textEdit_41->objectName();

If either of these "crash"/"go wrong", narrow down to textEdit_40 vs textEdit_41 one at a time. Is it because of just one of them, not the other? Or, does accessing either of them cause the problem?

At one point you said a SIGSTOP was reported. Now you talk about "crashing", or just exiting. In any case, are you compiling for debug and running inside the debugger? Does the debugger catch anything/stop/report anything when your code goes wrong or exits?

[micha_eleric]

@JonB both

ui->textEdit_40->setFixedSize(30,  30);
ui->textEdit_41->setFixedSize(30,  30);

cause problems. comment out the first, second one crashes. comment out both, it runs.

[JonB]

@micha_eleric And the rest of the things I suggested you try?

[micha_eleric]

@JonB

qDebug() << ui->textEdit_40->objectName() << ui->textEdit_41->objectName();
qDebug() << ui->textEdit_40->objectName();
qDebug() << ui->textEdit_41->objectName();

all caused crash, no messages, that i found

[SGaist]

Hi,

Is ui initialized properly ?

[JonB]

@micha_eleric
So it looks like you have a problem with those two textEdit pointers? Btw you have done a clean rebuild, so the uic has been run on the latest .ui file? You have initialised the ui prior to this code?

[micha_eleric]

@JonB said in gui not showing, or closing to fast to see:

At one point you said a SIGSTOP was reported. Now you talk about "crashing", or just exiting. In any case, are you compiling for debug and running inside the debugger? Does the debugger catch anything/stop/report anything when your code goes wrong or exits?

if i dont compile for debug, it runs, till i get to code that crashes. compile debug, and it crashes before getting to error code, and tells me nothing about where.

[micha_eleric]

@JonB said in gui not showing, or closing to fast to see:

@micha_eleric
So it looks like you have a problem with those two textEdit pointers? Btw you have done a clean rebuild, so the uic has been run on the latest .ui file? You have initialised the ui prior to this code?

actually, i am using a .h file. just saw yesterday, that i could not open it with qt 5 designer, and qt 5 designer saves in .ui

most other text boxes and buttons run fine.
code in .h file for text boxes and buttons, look like copy/paste except numbers change.
dont know how to convert .h to .ui, or how to open .h with qt 5 designer. the qt designer i used before was much easier to design with.

[JonB]

@micha_eleric
I happen to notice that after ui->textEdit_38 ui->textEdit_39 is absent, then you say it goes wrong at ui->textEdit_40. Don't know what you want 40+ text edits for, but anyway why not delete all after ui->textEdit_38, make sure it works at that point. Then add the further ones in and see how it goes.

[micha_eleric]

@JonB said in gui not showing, or closing to fast to see:

@micha_eleric
I happen to notice that after ui->textEdit_38 ui->textEdit_39 is absent, then you say it goes wrong at ui->textEdit_40. Don't know what you want 40+ text edits for, but anyway why not delete all after ui->textEdit_38, make sure it works at that point. Then add the further ones in and see how it goes.

yah. not sure about that.
did find 39,40, and 41 cause a crash in another part that call those three, but not the other text boxes.

[micha_eleric]

@JonB said in gui not showing, or closing to fast to see:

@micha_eleric
I happen to notice that after ui->textEdit_38 ui->textEdit_39 is absent, then you say it goes wrong at ui->textEdit_40. Don't know what you want 40+ text edits for, but anyway why not delete all after ui->textEdit_38, make sure it works at that point. Then add the further ones in and see how it goes.
runs fine

           std::cout << "InitTestBoard try 3 \n" << std::flush;
         //   ui->textEdit_40->setFixedSize(30,  30);
         //   ui->textEdit_41->setFixedSize(30,  30);
            ui->textEdit_42->setFixedSize(30,  30);
            ui->textEdit_43->setFixedSize(30,  30);
            ui->textEdit_44->setFixedSize(30,  30);
            ui->textEdit_45->setFixedSize(30,  30);
            std::cout << "InitTestBoard try end \n" << std::flush;

crashes

            std::cout << "InitTestBoard try 3 \n" << std::flush;
            ui->textEdit_40->setFixedSize(30,  30);
            ui->textEdit_41->setFixedSize(30,  30);
            ui->textEdit_42->setFixedSize(30,  30);
            ui->textEdit_43->setFixedSize(30,  30);
            ui->textEdit_44->setFixedSize(30,  30);
            ui->textEdit_45->setFixedSize(30,  30);
            std::cout << "InitTestBoard try end \n" << std::flush;

[micha_eleric]

found it
in CUi_MainWindow.h [the file that has gui layout] file 39, 40, and 41 are different

[JonB]

@JonB said in gui not showing, or closing to fast to see:

Btw you have done a clean rebuild, so the uic has been run on the latest .ui file?

@micha_eleric
Do a complete project rebuild/make some change in Designer to update the .ui file and force uic to run on it again. ui_MainWindow.h is a generated file; don't change it yourself, it will get overwritten.

[micha_eleric]

@JonB not sure where to ui or uic files are. if i still have them

[Pl45m4]

@micha_eleric

uic is the User Interface Compiler, which does exactly what you've mentioned before.. creates an usable header from your *.ui design template...
And every time you re-run it, your header file will be created or updated... so it makes no sense to edit the file yourself and change some object names

[micha_eleric]

@Pl45m4 just found the .iu file.
trying to remember what i did 4 years ago

[JonB]

@micha_eleric
Go into Designer, make some small change, save, build, does it work now?

[micha_eleric]

@JonB build is gray

[micha_eleric]

@JonB ok. default opens with qt creator, and build is gray
open with qt designer, and find no build

[micha_eleric]

@JonB said in gui not showing, or closing to fast to see:

@micha_eleric
Go into Designer, make some small change, save, build, does it work now?

where is build in qt designer?