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[qt4] Change disabled QLineEdit's background/foreground colours?

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RoyceyBaby

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Sunday, July 24th 2005, 3:00am

[qt4] Change disabled QLineEdit's background/foreground colours?

I am using the plastique theme under windows, but I don't like the way disabled QLineEdit's have a white background. I would also like to change the colour of the text that is displayed in the QLineEdit.

How can I achieve this? In Qt 3 it could be done via the designer, but the option is not available in Qt 4.

I think I have to start subclassing things, but I know nothing about this topic. Can anybody provide a simple example of what I have to do.

Many thanks,
Royce

bhobbs

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Wednesday, August 17th 2005, 10:19pm

I did something similar with the color of a checkbox. Here's the code that I wrote to make the text displayed in the disabled checkbox the same as the enabled checkbox:

Source code

 
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QDialog* displayDetailsDialog = new QDialog(this);
	Ui::DisplayDetailsDialogDesign dialogUI;
	dialogUI.setupUi(displayDetailsDialog);
	QPalette newPalette(dialogUI.ClearedCheckBox->palette());
	newPalette.setColor(QPalette::Disabled, 
                        QPalette::Foreground, 
			dialogUI.ClearedCheckBox->palette().color(QPalette::Active, 
			              QPalette::Foreground));
	dialogUI.ClearedCheckBox->setPalette(newPalette);


I recommend checking out the following:

http://doc.trolltech.com/4.0/qpalette.html#details

http://doc.trolltech.com/4.0/qpalette.html#ColorGroup-enum


Brandy

wysota

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Thursday, August 18th 2005, 12:57am

Subclassing the style would probably be the proper way to do it (as it would change the behaviour globally).
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bhobbs

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Thursday, August 18th 2005, 2:18pm

Yeah, that might be a better option in your case since you want to apply it to all line edits. I only wanted to do it for one checkbox.

There's a good example of this in the QStyle docs: http://doc.trolltech.com/4.0/qstyle.html#details