[SOLVED] QTreeWidgetItem question, i don't want all the columns editable.

xmaze

Hi again, i have written some more code but the App crashes with SIGABRT signal.

@void MainWindow::checkValues(QTreeWidgetItem *item, int column) // SLOT emited from SIGNAL itemchanged()
{
if(column==4) checkByte(item->text(column),column,item);

}
void MainWindow::checkByte(QString byte, int column, QTreeWidgetItem* item)
{
bool *ok; QString *b;
b=&byte;
int bytetoint = b->toUInt(ok,16);
if(bytetoint>255) {
QMessageBox::warning(this,"ERROR","Byte"+byte.setNum(column-3)+" it's higher than 255 or FF");

    item->setText(column,"FF");
}

}
@

When the program exits the checkByte() function crashes, i cannot understand what, i tried to set blocksignal() but its not helps. i thougt that is a infinite loop between itemchanged and item->setText...any ideas ? i am not also sure if i pass correct the item pointer from checkValues to checkByte!

SGaist

ok is not initialized and why b ?

@
bool ok;
int bytetoint = byte.toUInt(&ok,16);
@

By the way, why not use a validator ? That check won't be necessary

xmaze

[quote author="SGaist" date="1416478426"]ok is not initialized and why b ?

@
bool ok;
int bytetoint = byte.toUInt(&ok,16);
@

By the way, why not use a validator ? That check won't be necessary[/quote]
if i use byte.toUint() then the app crashes, do you mean that i need to use byte as pointer and not as object ?
why you said ok its not intialized? after the conversion it changes to True.

SGaist

[quote author="xmaze" date="1416477611"]
@
void MainWindow::checkByte(QString byte, int column, QTreeWidgetItem* item)
{
bool *ok; QString *b; << ok as well as b are uninitialized pointers
b=&byte;
int bytetoint = b->toUInt(ok,16); << b->toUint is the same as byte.toUInt
@
[/quote]

xmaze

Hi, i understood what you meant, that was my first approach, but the App crashes. i embedded a time elapse with debugging.

if i made this trick with pointer the i dont have problem. i am running under Fedora 20.

http://tinypic.com/r/21l0j2b/8

SGaist

What does a run trough the debugger show you ?

xmaze

Problem found, i made a big mistake but i did not see that.

My Code was @ bool * ok
int bytetoint = byte.toUint(ok,16);@

i change that to @ bool ok
int bytetoint = byte.toUint(&ok,16);@

now its working, Thank you a lot, it was a big mistake from me!!

SGaist

You're welcome !

Since you have it working now, please update the thread title prepending [solved] so other forum users may know a solution has been found :)

xmaze

Ok, but i have some other questions, need to make a new thread ?

I want to know in closeEvent() function who is the sender, i have 2 widget and i want to close both of them if one widget is closed.
but if i have Qdialogbox to ask if the user is sure, then i have a spam annoying dialogbox! the QObject::sender() not working!

SGaist

Yes, a new thread would be better.

Because closeEvent is not a slot so there's no sender. A global hint for Qt: when a function has Event in it's name, it's not a slot.