QtListView::connect

Hi
I'm trying using QListView to filebrowsing.

Code:

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QDirModel *model = new QDirModel;
list = new QListView(centralwidget); //QListView *list;
list->setGeometry(QRect(250 , 250 , 250 , 250));
list->setModel(model);
list->setRootIndex(model->index(QDir::homePath()));
QListView::connect(list , SIGNAL(pressed(QModelIndex)) , list , SLOT(setRootIndex(QModelIndex)));

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I'm trying to make a function to turn back previous directory.
Does anyone have a hint or solution ?

Quote:

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I'm trying to make a function to turn back previous directory.

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your code is populating the list with the lower lever of anything you click on the list. (or, makes the clicked item as root)

Where is a code that should do the "back" functionality?

I found this code on my machine:

Code:

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// In constructor...
    root = dirModel->index(QDir::currentPath());
    listView->setRootIndex(root);
 
// later...
void MainWindow::up_button_clicked()
{
    root = root.parent();
    listView->setRootIndex(root);
}
 
void MainWindow::listview_double_clicked(QModelIndex index)
{
    if (static_cast<const QDirModel *>(index.model())->isDir(index))
    {
        root = index;
        listView->setRootIndex(root);
    }
    else
    {
        // do something with clicked file.

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Hi

try this

Code:

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bool QDir::cdUp ()

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Thanks for reply to this thread.

I tried following code

Code:

---

QDirModel *model = new QDirModel;list = new QListView(centralwidget); //QListView *list;
list->setGeometry(QRect(250 , 250 , 250 , 250));
list->setModel(model);
list->setRootIndex(model->index(QDir::homePath()));
QListView::connect(list , SIGNAL(pressed(QModelIndex)) , list , SLOT(setRootIndex(QModelIndex)));
QListView::connect(list , SIGNAL(entered(QmodelIndex)) , list , SLOT(setRootIndex(QDir::cdUp())));

---

and i received following application output message

Object::connect: No such slot QListView::setRootIndex(QDir::cdUp()) in window.h:86

I thought that I must change QlistView:: to another one.
Does this understanding is right??

thanks regard

Look, your problem is that you don't understand C++, and basics of the signal slot machanism and syntax.
When you give a slot in the connect() function, you have to specify the types the slot is taking, you however are CALLING the QDir::cdUp() method.
In addition, cdUp() returns a bool, and your slot expects a QModeIndex.

I write following slot

Code:

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void MainWindow::up_button(QModelIndex *index  ,  QListView *view) {
       view->setRootIndex(index->parent());
}

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And I wrote in this slot to following code

Code:

---

QDirModel *model = new QDirModel;
list = new QListView(centralwidget);
//QListView *list;
list->setGeometry(QRect(250 , 250 , 250 , 250));
list->setModel(model);
list->setRootIndex(model->index(QDir::homePath()));
QListView::connect(list , SIGNAL(clicked(QModelIndex)) , list , SLOT(setRootIndex(QModelIndex)));
connect(list , SIGNAL(entered(QModelIndex)) , list , SLOT(up_button(QModelIndex , list )));

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and i see following Application output

Object::connect: No such slot QListView::up_button(QModelIndex , list)

where page i have to see to understand signal and slot ?

Quote:

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where page i have to see to understand signal and slot ?

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http://doc.trolltech.com/4.6/signalsandslots.html

I write two slot and "double_click" work but up_button doesn't work.

Code:

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connect(list , SIGNAL(doubelClicked(QModelIndex)) , this ,  SLOT(doubel_click(QModelIndex)));
connect(list , SIGNAL(clicked(QModelIndex)) , this , SLOT(up_button(QModelIndex)));

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Code:

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void MainWindow::up_button(QModelIndex index) {
	list->setRootIndex(index.parent());
}

---

Code:

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void MainWindow::double_click(QModelIndex index) {
	if(static_cast<const QDirModel *>(index.model())->isDir(index)) {
		list->setRootIndex(index);
	}
}

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I write puts("debug"); in up_button() and confirm that up_button works.
I thought that
list->setRootIndex(index.parent());
is wrong way to turn back .
I have no plan .