<![CDATA[[SOLVED] QStyleOptionViewItem draw text ?]]>Hi,

I am working on a tableView that uses a QStyledItemDelegate. Inside the itemDelegate I am trying to render a QLineEdit with someText but somehow the text is not displayed. eg

@if (condition)
{
QStyleOptionViewItem item(option);
item.rect = option.rect;
item.text = "Hello World";
item.palette = QPalette(Qt::Red); // just for test

QApplication::style()->drawPrimitive(QStyle::PE_PanelLineEdit, &item, painter);
QApplication::style()->drawPrimitive(QStyle::PE_FrameLineEdit, &item, painter);
}@

But the text is not rendered at all but if I use qDebug() << item.text; it gives the right output.

How to render the text using QStyleOptionViewItem ?

Thanks

]]>https://forum.qt.io/topic/28415/solved-qstyleoptionviewitem-draw-textRSS for NodeMon, 13 Apr 2026 06:06:33 GMTTue, 18 Jun 2013 10:09:43 GMT60<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Thu, 20 Jun 2013 12:22:47 GMT]]>Thanks Andre,

I think then I have to check/set the color for the painter based on properties specified for the lineEdit.

]]>https://forum.qt.io/post/183582https://forum.qt.io/post/183582Thu, 20 Jun 2013 12:22:47 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Thu, 20 Jun 2013 12:10:57 GMT]]>[quote author="Sam" date="1371730152"]and if we are setting the background-color through stylesheets then also its not possible to retrieve the value ?[/quote]
AFAIK: indeed not. The style sheets are not exposed through the public API other then setting them on a widget or the application.

I'd love to be proven wrong on this one though!

]]>https://forum.qt.io/post/183581https://forum.qt.io/post/183581Thu, 20 Jun 2013 12:10:57 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Thu, 20 Jun 2013 12:09:12 GMT]]>and if we are setting the background-color through stylesheets then also its not possible to retrieve the value ?

PS : QPalette::Background return gray color

]]>https://forum.qt.io/post/183580https://forum.qt.io/post/183580Thu, 20 Jun 2013 12:09:12 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Thu, 20 Jun 2013 12:06:07 GMT]]>try QPalette::Background

]]>https://forum.qt.io/post/183578https://forum.qt.io/post/183578Thu, 20 Jun 2013 12:06:07 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Thu, 20 Jun 2013 12:03:48 GMT]]>No. It might not even be a color. It might be a brush. Or an image, or...

]]>https://forum.qt.io/post/183579https://forum.qt.io/post/183579Thu, 20 Jun 2013 12:03:48 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Thu, 20 Jun 2013 12:01:59 GMT]]>One more question I would like to ask , is there anyway we can get the background-color of the lineEdit which is set through stylesheets like in the above image the yellow color is set through stylesheet.

Anything like
lineEdit->palette().color(QPalette::?????);

]]>https://forum.qt.io/post/183577https://forum.qt.io/post/183577Thu, 20 Jun 2013 12:01:59 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Tue, 18 Jun 2013 11:50:53 GMT]]>thats why i asked ;)

]]>https://forum.qt.io/post/183258https://forum.qt.io/post/183258Tue, 18 Jun 2013 11:50:53 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Tue, 18 Jun 2013 11:46:28 GMT]]>yes the background color for the lineEdit changes through styleSheets.
Yes easiest way is to change the background color of the cell.

Thanks :)

PS : I was thinking too complex :)

]]>https://forum.qt.io/post/183255https://forum.qt.io/post/183255Tue, 18 Jun 2013 11:46:28 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Tue, 18 Jun 2013 11:37:52 GMT]]>just draw the text with a simple background is enough for you?

How do you exactly change the background color of the line edit when the QValidator fails? By Stylesheet?

]]>https://forum.qt.io/post/183253https://forum.qt.io/post/183253Tue, 18 Jun 2013 11:37:52 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Tue, 18 Jun 2013 11:34:08 GMT]]>[quote author="raven-worx" date="1371554769"]ok, but why do you want to draw a line edit instead of using a real qlinedit widget?
pro: works our of the box like a qlineedit should
con: may cause performance
[/quote]

I can't use setInexWidget() performance drops heavily !!!

bq. Or why do you want to use a QLineEdit widget at all?

The lineEdit is initialized in the createEditor(). what else you recommend ?

]]>https://forum.qt.io/post/183251https://forum.qt.io/post/183251Tue, 18 Jun 2013 11:34:08 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Tue, 18 Jun 2013 11:26:09 GMT]]>ok, but why do you want to draw a line edit instead of using a real qlinedit widget?
pro: works our of the box like a qlineedit should
con: may cause performance

Or why do you want to draw a QLineEdit widget at all and not just simply the text with a background color?

]]>https://forum.qt.io/post/183250https://forum.qt.io/post/183250Tue, 18 Jun 2013 11:26:09 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Tue, 18 Jun 2013 11:22:32 GMT]]>Ok i'll explain in detail,

The background color(yellow/red) of the lineEdit changes based on the validator and the current text. The tableview cell should render the same palette/effect of the lineEdit.

The lineEdit is initialized/editable when a particular cell is clicked. I need to set the same effect for a particular cell. For the tableView each cell contains an object of a class that stores the property like text/palette etc.

Eg I need to render something like

!http://img42.imageshack.us/img42/3738/v3c4.png(lineEdit)!

]]>https://forum.qt.io/post/183246https://forum.qt.io/post/183246Tue, 18 Jun 2013 11:22:32 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Tue, 18 Jun 2013 11:05:46 GMT]]>what exactly do you mean?

]]>https://forum.qt.io/post/183245https://forum.qt.io/post/183245Tue, 18 Jun 2013 11:05:46 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Tue, 18 Jun 2013 10:59:48 GMT]]>Thanks for a quick reply !!!!

I changed style option to QStyleOpionFrameV2 (I just checked the source of qlineedit.cpp )

@QApplication::style()->drawPrimitive(QStyle::PE_PanelLineEdit, &item, painter);

QApplication::style()->drawPrimitive(QStyle::PE_FrameLineEdit, &item, painter);

painter->drawText(QApplication::style()->subElementRect(QStyle::SE_LineEditContents, &item),text);@

Now the text is rendered but there is a little offset on the y() value , anyhow i'll adjust that. But what about the palette how to change that ?

Thanks

]]>https://forum.qt.io/post/183244https://forum.qt.io/post/183244Tue, 18 Jun 2013 10:59:48 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Tue, 18 Jun 2013 10:30:09 GMT]]>I think you're passing the wrong type of style option... Note that you'll also need to render the contents of the line edit, not just the frame.

]]>https://forum.qt.io/post/183242https://forum.qt.io/post/183242Tue, 18 Jun 2013 10:30:09 GMT<![CDATA[Reply to [SOLVED] QStyleOptionViewItem draw text ? on Tue, 18 Jun 2013 10:29:01 GMT]]>i think the problem is that you just don't draw the text ^^

Look at QLineEdit::paintEvent() implementation (<Qt5-src>\qtbase\src\widgets\widgets\qlineedit.cpp).
In there you will see that at the beginning the frame/panel is drawn and then then alot of code follows just for text rendering...

You can all the code you need from there

or just draw the text with QPainter::drawText() into the rect (using QStyle::subElementRect(QStyle::SE_LineEditContents))

maybe the most wasiest way: hold a QLineEdit widget as member in your delegate and render it:

@
m_RenderLineEdit.setGeometry(option.rect);
m_RenderLineEdit.render(painter);
@

]]>https://forum.qt.io/post/183241https://forum.qt.io/post/183241Tue, 18 Jun 2013 10:29:01 GMT