How to disable the cursor in QTextEdit?

Question

I am now using QTextEdit with qt virtual keyboard, and I face an issue with QTextEdit

I want to disable the textcursor in QTextEdit. I tried to use

setCursorWidth(0);

The textcursor does disappear. But when I use arabic keybaord, there will be a small arrow blinking up there

like this:

Is there any way to disable that blinking cursor? thanks a lot!

Zillion

Answer 1

Actually this is a Qt bug which is reported here. As a workaround you can have your custom class which inherits from QTextEdit and re-implement keyPressEvent event:

class TextEdit : public QTextEdit
{
public:
    TextEdit(QWidget* parent = nullptr) : QTextEdit(parent) {
        setReadOnly(true);
    }
    void keyPressEvent(QKeyEvent* event) {
        setReadOnly(false);
        QTextEdit::keyPressEvent(event);
        setReadOnly(true);
    }
};

This will also hide the cursor in Right to left languages.

Wheelhorse

Hi Nejat, thanks to your comment. But I'm also using qt virtual keybaord now. I'm trying to use virtaul keybaord to type some arabic onto the QTextEdit. It seems that when I set "setReadOnly(true)", then I can not activate qt virtual keyboard. – Zillion

Answer 2

A simple solution is to create a QProxyStyle, so all the widgets will be affected without the need to inherit from that class.

#include <QtWidgets>

class CursorStyle: public QProxyStyle
{
public:
    using QProxyStyle::QProxyStyle;
    int pixelMetric(QStyle::PixelMetric metric, const QStyleOption *option = nullptr, const QWidget *widget = nullptr) const override
    {
        if(metric == PM_TextCursorWidth)
            return 0;
        return  QProxyStyle::pixelMetric(metric, option, widget);
    }
};


int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    CursorStyle *style = new CursorStyle(a.style());
    a.setStyle(style);
    QWidget w;
    QVBoxLayout *lay = new QVBoxLayout(&w);
    lay->addWidget(new QLineEdit);
    lay->addWidget(new QTextEdit);
    w.show();
    return a.exec();
}

Vomer

hi, thanks for your comment! I think the class you implemented did similar things as setCursorWidth(0) ? (if(metric == PM_TextCursorWidth) return 0;) However, I can still see the blinking arrow after using this. And by the way, I'm using qt virtual keyboard to type arabic, not the hardware keybaord on laptop/computer. – Zillion