Key press event to choose list

Kinesis

Hi , I would like to add up and down key press event functions in my code . There are directory lists in a widget , when I click a directory the items (inside this selected directory) will be displayed. In that case I want to add up and down key press action , if I press down key from keyboard , the below directory will be selected and display every items and same function for up key.How can I add key press event?

jsulm

@Kinesis What widget is this? QListWidget?

Kinesis

@jsulm
Yes widget is QListWidget.Here is the current code.

 connect(listWidget_dirList, & QListWidget::itemClicked,[directory,listWidget_main,this](QListWidgetItem *item)
        {
            listWidget_main->show();
            listWidget_main->clear();
            // QDir directory(item->text());
            QDir dir = directory.absolutePath() + '/' + item->text();

dir.setNameFilters({"*.png", "*.jpg"});

            for(const QFileInfo & finfo: dir.entryInfoList()){

                QPixmap image(finfo.absoluteFilePath());
                auto imageLabel = new QLabel();
                imageLabel->setMinimumSize(320,320);
                imageLabel->setScaledContents(true);
                imageLabel->setPixmap(image);



                auto    item = new QListWidgetItem("",listWidget_main);
                auto    widget = new QWidget;
                auto    label = new QLabel(finfo.fileName());
                auto    vb = new QVBoxLayout;

                vb->addWidget(label);
                vb->addWidget(imageLabel);

                widget->setLayout(vb);
                widget->setMinimumSize(340,340);
                listWidget_main->setItemWidget(item,widget);
}

jsulm

@Kinesis Can't you just use http://doc.qt.io/qt-5/qlistwidget.html#currentRowChanged ?

Kinesis

@jsulm
Well , as you said I tried to use currentRow Changed , but I need to take the text from current row , to get directory path. How can I get the text from current row.There may be some mistakes in my code.Take a look please.

connect(listWidget_dirList, & QListWidget::currentRowChanged,[directory,listWidget_main,this](int currentRow)
        {
            listWidget_main->show();
            listWidget_main->clear();
            // QDir directory(item->text());
            QDir dir = directory.absolutePath() + '/' + currentRow->text();
            dir.setNameFilters({"*.png", "*.jpg"});

            for(const QFileInfo & finfo: dir.entryInfoList()){
      ----------------
      ----------------
      ----------------
}
});

jsulm

@Kinesis As you can see currentRow is an integer - you can't call any methods on it, right?
If you check the documentation you will find this: http://doc.qt.io/qt-5/qlistwidget.html#item

Kinesis

@jsulm
So how can I get the text from selected directroy ? Is there another method to get the text ? I think I can use "QListWidget::itemSelectionChanged()". But if I use that how can I get the text(directory path)?

jsulm

@Kinesis I already suggested what to do to get the text. Did you read it? Again: you can get the current item using currentRow and http://doc.qt.io/qt-5/qlistwidget.html#item, then you simply call http://doc.qt.io/qt-5/qlistwidgetitem.html#text on the item to get the text.

Kinesis

@jsulm
I tried to get the current row with "QListWidgetItem *item(int row)" and call"item->text()" on the item to get the text . It still doesn't work.But I dont't know where I made mistake.

SGaist

Hi,

@Kinesis said in Key press event to choose list:

listWidget_main->show();
listWidget_main->clear();

Aren't you emptying the content of your listWidget before getting the value you are interested in ?

Kinesis

@SGaist
Yes , I first clear the widget and show items from other dirs. If I don't clear the widget , that's still fine. I just want to test it clearly.

jsulm

@Kinesis said in Key press event to choose list:

QListWidgetItem *item(int row)

connect(listWidget_dirList, & QListWidget::currentRowChanged,[directory,listWidget_main,this](int currentRow)
{
    listWidget_main->show();
    listWidget_main->clear();

    QListWidgetItem *item = listWidget_dirList->item(currentRow);
    if (item)  {
        QString text = item->text();
        ...
    }

Kinesis

@jsulm
I am really sorry . I misunderstood your explanation . Now it works . Thanks

SGaist

My bad, I misread from where the signal came from.

Solved Key press event to choose list