Textarea slow for logging

Question

I have a Qt application and I\'d like to show some log. I use a TextArea. However, if the log is large or the events come too fast the GUI can\'t draw Te

Answer 1

I tried the ListView suggestion but it has several drawbacks:

• No easy way to keep the view positioned at the bottom when new output is added
• No selection across lines/delegates

So I ended up using a cached TextArea, updating once every second:

TextArea {
            id: outputArea_text
            wrapMode: TextArea.Wrap
            readOnly: true
            font.family: "Ubuntu Mono, times"

            function appendText(text){
                logCache += text + "\n";
                update_timer.start();
            }

            property string logCache: ""

            Timer {
                id: update_timer
                // Update every second
                interval: 1000
                running: false
                repeat: false
                onTriggered: {
                    outputArea_text.append(outputArea_text.logCache);
                    outputArea_text.logCache = "";
                }
            }

            Component.onCompleted: {
                my_signal.connect(outputArea_text.appendText)
            }
        }