What is the best widget for implementing messages?

[Thank You]

As said in question what is best widget for implementing messages like messenger or any other application

Don't mind about those creepy shapes but
It's just design
I have used QList Widget But
I can't use STYLESHEETS to design it as I like
Like different colors in same message

I can use label but If there is something easy way to do it then It would be easier for me too
Any suggestions on it?

[JonB]

@Thank-You
As you say, you can use QListView for the list support and QLabel would allow rich text like e.g. in-line color change.

[Thank You]

@JonB So which would consume less memory
QListWidget or QLabel ??
Suppose there are 1000 messages
Then which would be efficient for it

[JonB]

@Thank-You said in What is the best widget for implementing messages?:

So which would consume less memory
QListWidget or QLabel ??

1 QListWidget versus 1 QLabel? How are you going to do your

Like different colors in same message

if you use a QListWidget? What do you intend to use other than a QLabel (or maybe QLineEdit, but I don't think so) to display your message texts? Unless you intend to write an item delegate for your messages?

[SGaist]

Hi,

A thousand labels will always be less efficient than a properly implement model / view architecture.

There's an excellent Chat Example on the wiki that you can get inspiration from.

[Thank You]

@SGaist Thank you for suggesting

Sorry I forgot to inform you that
It isn't real chatting application just like simulated

All messages are stored in database
When I clicked the "send message(triangular)" it saves the data to database
And when I clicked the reload "that circular button" the data re fetches and fill the labels or datas
Although this isn't real chat application. For now it can do work.

Now which would be the best Label or Listview/listwidget

Taking the point that you must update everything when refresh is clicked

[JonB]

@Thank-You
If you are really concerned about memory and if you really have 1,000 items the only "efficient" way is some kind of model+view with a suitable item delegate for displaying the items. If you want "Like different colors in same message" you probably want some HTML/rich text support.

[Thank You]

@JonB I think either lineedit with input disabled or QLabel is best for me.
Can I insert these in QScrollArea
or should I create widget and set layout including all labels??

    ui->messages->clear();
    QString command = "SELECT * FROM messages;";

    {
        QSqlDatabase db  =  QSqlDatabase::addDatabase("QSQLITE","message_load");
        db.setDatabaseName("./messages.db");


        if(db.open()){
                QVBoxLayout *messagesLayout = new QVBoxLayout(ui->messageWidget);
            QSqlQuery query(db);
            if(query.exec(command)){
                while (query.next()) {
                    QString id = query.value(0).toString();
                    QString sender = query.value(1).toString();
                    QString message = query.value(2).toString();
QLabel *messageLabel = new QLabel(message+"\n<i style='font-size:7px;'>Sent by: "+sender+"</i>");
messagesLayout->addWidget(messageLabel);
                  
                }
                ui->messageWidget->setLayout(messagesLayout);
            }else{
               QMessageBox::warning(this,"no","no"+query.lastError().text());
            }

        }else{
            QMessageBox::warning(this,"NO DB ", "NO DB"+db.lastError().text());
        }

    }

Or can you suggest to add label when button is pressed automatically with scrolling

[JonB]

@Thank-You
You asked about memory and efficiency. We have said anything which creates and displays 1,000 widgets will be bad. Yet after your questions you still choose that route.

Yes you can put multiple widgets onto a scroll area.