How to inset a png image in a dialog

[graciano]

Hi
I want to use a smilie to show if the data entered in a lineEdit e valid.
:) for true or :( for false.
I have two images: true.png and false.png.
How can i do this in Qt and what classes can i use?
Thanks

[THRESHE]

You can use QLabel with setPixmap function and connect lineEdit's textChanged signal to the slot that changes image

For instance


connect(lineEddit, SIGNAL(textChanged(const QString& text)), this, SLOT(changePixmap(const QString& text)))

yourDialog::changePixmap(const QString& text)
{
if(text == "Valid")
pixmapLable->setPixmap(QPixmap(true.png));
else
pixmapLable->setPixmap(QPixmap(false.png));
}

[graciano]

Thanks
I was blind about the label! In my mind i was only thinking of text:rolleyes:
By the way... i created a folder "pixmaps" where i stores the smilies.
The i used something like:

...
png = new QLabel();
png->setPixmap(QPixmap("pixmaps/happy.png"));
...

Is this a good practice or are there other ways to store large collections of images?

And thanks again for the preciouse help.

[GioFX]

you should use qrc
http://doc.trolltech.com/4.4/resources.html

[graciano]

Thanks ... i will take a look at the link.

[rexi]

You could also consider using the QLineEdit::textEdited() signal instead of QLineEdit::textChanged(). The first is emitted only when the user changes the contents, while the latter is also emitted when the application itself changes the contents. Not a great deal in most cases, but I found it helpful to know the difference ;)