Home/ Questions/Q 4008042
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-20T08:42:19+00:00

I am using QT to create a chat messenger client. To display the list

  • 0

I am using QT to create a chat messenger client. To display the list of online users, I’m using a QListWidget, as created like this: 

listWidget = new QListWidget(horizontalLayoutWidget);
listWidget->setObjectName("userList");
QSizePolicy sizePolicy1(QSizePolicy::Preferred, QSizePolicy::Expanding);
sizePolicy1.setHorizontalStretch(0);
sizePolicy1.setVerticalStretch(0);
sizePolicy1.setHeightForWidth(listWidget->sizePolicy().hasHeightForWidth());
listWidget->setSizePolicy(sizePolicy1);
listWidget->setMinimumSize(QSize(30, 0));
listWidget->setMaximumSize(QSize(150, 16777215));
listWidget->setBaseSize(QSize(100, 0));
listWidget->setContextMenuPolicy(Qt::CustomContextMenu);

Users are shown by constantly refreshing the list, like this: (Note: There are different channels, with different userlists, so refreshing it is the most efficient thing to do, as far as I know.)

void FMessenger::refreshUserlist()
{
    if (currentPanel == 0)
        return;
    listWidget = this->findChild<QListWidget *>(QString("userList"));
    listWidget->clear();
    QList<FCharacter*> charList = currentPanel->charList();
    QListWidgetItem* charitem = 0;
    FCharacter* character;
    foreach(character, charList)
    {
        charitem = new QListWidgetItem(character->name());
        // charitem->setIcon(QIcon(":/Images/status.png"));
        listWidget->addItem(charitem);
    }
}

This has always worked perfectly. The line that I commented out is the one I have problems with: my current goal is to be able to display a user’s online status with an image, which represents whether they are busy, away, available, etc. Using setIcon() does absolutely nothing though, apparently; the items still show up as they used to, without icons.

I’m aware that this is probably not the way this function needs to be used, but I have found little documentation about it online, and absolutely no useful examples of implementations. My question is, can anybody help me with fixing this problem?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    This is how you may conduct your debugging:

    • Try the constructor that has both icon and text as arguments.
    • Try to use that icon in another context to ensure it is displayable (construct a QIcon with same argument and use it elsewhere, e.g. QLabel!).
    • Use icon() from the QListWidgetItem to receive back the icon and then look at that QIcon.
    • Create a new QListWidget, change nothing, and ordinarily add some stock items in your MainWidget’s constructor. See if the icons show up there.
    • 0