[Qt-interest] Widget to use on Model/View

[João Mesquita]

Hello guys, this is my first post so I am sorry if there is something
obvious I am missing.

I am developing an application that has a console like interface and I
thought of using QListView to represent this console. Each line on the
console would be an item that is then appended to the QListView model. The
advantage of using such a widget is that the console log messages can be
sorted easily. I could easily make checkboxes to hide certain messages that
do not belong to certain log levels or apply Regex or even filters using a
custom QSortProxyModel. If anyone is familiar with Wireshark, that is
exactly the same behavior I am trying to achieve.

Problem here is performance. When sorting, not a problem, but when inserting
a large number of lines per second, I make the UI unresponsive and even
unusable. Should I change the widget, the model or not possible at all?

Here is the code I am using (modified batch append code of QListWidget).

 void ConsoleTabWidget::timerEvent(QTimerEvent *e)

{

bool scroll = false;

if (e->timerId() == scrollTimer->timerId())

{

if (m_ui->consoleListView->verticalScrollBar()->value() ==
m_ui->consoleListView->verticalScrollBar()->maximum())

scroll = true;

 int inserted_items = 0;

while( !_list_items.isEmpty() && inserted_items < batch)

{

sourceModel->appendRow(_list_items.takeFirst());

inserted_items++;

}

if (scroll)

m_ui->consoleListView->scrollToBottom();

}

}

Any help would be wonderful!

Thank you,

jmesquita
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