QTreeView and its signals, and setting directory of its QFileSystemModel

yodermk

Hi again,

Still working on a desktop photo calendar, and the QTreeView that will be used to select photos is baffling me. I've connected both the activated and clicked signals to a slot, but nothing I do can get it triggered. The connection (also tested replacing clicked with activated):

@connect(ui->browserTreeView, SIGNAL(clicked(QModelIndex)), this, SLOT(photoSelectionChanged(QModelIndex)));
@

Direct link to the connect and the slot:
https://github.com/yodermk/LIbreCalendarCreator/blob/master/choosecropphotodialog.cpp#L12
https://github.com/yodermk/LIbreCalendarCreator/blob/master/choosecropphotodialog.cpp#L20

Also, what is the best way to set its current directory? If I do this:

@ ui->browserTreeView->setCurrentIndex(photoSelectionModel->index(QDir::currentPath()));
@

That seems to set a hard path; I can not navigate above that directory, or see any files in it.

Thanks for any help!!!

SGaist

Hi,

Did you check if you get any error about signals and slots in the application output panel ? If not, are you sure you are printing something that currently contains something ?

IIRC, you need to call setRootPath on your QFileSystemModel

Hope it helps

yodermk

Well the setRootPath helped it be more navigable, but did not make the signals work.

Just to be sure, I addd a qDebug("hello world") above the line printing the index value. Still I see nothing.

Thanks!

SGaist

Did you check if you had any warnings on the console ?

yodermk

Yes - there were no warnings at all on the console.

SGaist

Does your QTreeWidget get populated correctly ?

yodermk

Seems to be. I can definitely navigate the filesystem with it.

I am starting to wonder if only the Enter key can send these signals on Linux, and in my case Enter is closing the dialog. That wouldn't make much sense with clicked() though.

Ultimately I want a signal to fire when a user clicks or moves the highlight through the tree with the arrow keys.

SGaist

Then it should be the activated signal IIRC

yodermk

Yeah, that's what I thought too, and it's the first one I tried; it's just not getting fired!

I guess I should try to come up with a minimal example and see if it works there.

SGaist

In between, what version of Qt and what OS are you using ?

yodermk

qt 5.3.1 on Arch Linux, from the Arch repos....

yodermk

Guess I'll eat my words here. In the slot I added this:

@ QMessageBox::information(this, "test", "hello we reached the slot!");
@

and changed the signal to activated(), and it did show this when I clicked on an entry! (But not on moving the selection with the arrow keys.)

But that leaves the perplexing question of why these did not output anything.

@ qDebug("hello world\n");
qDebug(photoSelectionModel->data(index).toString().toLatin1());@

I've used qDebug before in this project ...

Thanks!

SGaist

Add some defines somewhere in your pro file ?

Changed Qt version ? Release VS Debug ?