Dynamically rotate QTextEdit

Kaznachei

I've got idea. When QTextEdit contains position of mouse i can rotate it by moving of mouse. I tried to rotate only text and resize QTextEdit but there are some problems. ```

setFixedSize(1000,1000);
QRect idealRect(0,0,document()->idealWidth(), fontMetrics().height()*toPlainText().split("\n").size());

QTransform t;
t.translate(idealRect.width()/2, idealRect.height()/2).rotate(-45).translate(-idealRect.width()/2, -idealRect.height()/2);

idealRect = t.mapRect(idealRect);


setFixedSize(idealRect.width(),idealRect.height());
painter->begin(viewport());
painter->setTransform(t);
painter->drawText(0,idealRect.height()/2, toPlainText());
painter->end();

``` ``

Often shape larger then it should be or not all text inside QTextEdit. I wrote class TextEdit which inherits QTextEdit and overrided paintEvent. Maybe i must use another class to make rotation of widget&

mrjj

Hi and welcome to the forums.
It would help if you first told us what the goal is.

You want to draw some rotated text ?

Or you want to make a widget that can rotate text with the mouse, like in a drawing program?

And where will you use this text or widget ?

Kaznachei

Thank you. I want to make opportunity to rotate text. If i could rotate widget i would like to rotate widget else rotate text. I do not want to rotate text by widget i want to rotate widget which contains string (QTextEdit). Can i do it?

mrjj

@Kaznachei
you mean so its still possible to type text into it ?
While rotated ?

Kaznachei

Yes. I can print something if it 82 degrees for example

mrjj

@Kaznachei

Hi
Rotating the actual TextEdit is hard to do, but drawing the text rotated is possible.
I found using a QPainterPath, gave the best results. (at least on windows)

 virtual void paintEvent(QPaintEvent *event) override
    {
        QPainter painter(this);
        painter.setRenderHint( QPainter::Antialiasing, true );
        painter.drawRect(rect());
        QFont font;

        font.setPointSize( 12 );
        font.setStyleStrategy( QFont::StyleStrategy::PreferAntialias );
        painter.setFont( font );

        QRect m_window = QRect(- width() / 2, - height() / 2, width(), height());
        painter.setWindow( m_window );
        QRect m_viewport = QRect(0, 0, width(), height());
        painter.setViewport( m_viewport );
        // rotate
        painter.rotate( 80 );
        //draw text
        QPainterPath glyphPath;
        glyphPath.addText( 0, 0, painter.font(), "TEXT" );
        painter.fillPath( glyphPath, painter.pen().color() );

    }

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