QTextEdit can not redraw when its Ancestor is a native widget(use dx9 painting)?

[Wu X]

This post is deleted!

[SGaist]

Hi and welcome to devnet,

You're a bit too vague. What version of Qt ? On what version of Windows ?

If possible, you should share your implementation so other can take a look at it.

[Wu X]

@SGaist said in QTextEdit can not redraw when its Ancestor is a native widget(use dx9 painting)?:

vague

Thank you for your reply.
Qt Ver = 5.6 in Win10.

code likes:

//this is my m_mainView part implementation
D3dWidget()D3dWidget(QWidget *parent): QWidget(parent)
{
    	setAttribute(Qt::WA_PaintOnScreen, true);
	setAttribute(Qt::WA_NativeWindow, true);
        initializeDirect3D();//Creat D3DDevice using winId()
}
QPaintEngine* D3dWidget::paintEngine() const
{
	return NULL;
}

void  D3dWidget::mouseDoubleClickEvent(QMouseEvent *event)
{
        m_pTextEdit = new QTextEdit(this);
        m_pTextEdit->setStyleSheet("background-color:transparent;");
	m_pTextEdit->setAcceptRichText(false);
	m_pTextEdit->setWordWrapMode(QTextOption::NoWrap);
        m_pTextEdit->setPlainText("This is a test text!");
        m_pTextEdit->move(event->pos());
       m_pTextEdit->resize(200,100);
	m_pTextEdit->show();
	m_pTextEdit->setFocus();
}

and

auto m_mainView = new D3dWidget();
vlayout->addWidget(m_mainView);//the layout belong to one QScrollAreaWidget

[Wu X]

oops.
may be I found the key codes.

m_pTextEdit->setStyleSheet("background-color:transparent;");

when delete this code,QtextEdit works normal.

But I expect the TextEdit is transpatrent so that make user looks like edit in the view.
what can i do?

[SGaist]

Did you check the Creating Transparent Windows documentation in the QWidget documentation ?

[Wu X]

@SGaist yes, i read it,but the documentation no mention of without QPainter.I doubt have some special mechanism when using DirectX instead of Qpainter.

[SGaist]

What are you drawing with DirectX ?