How to make size of button in the LineEdit smaller?

Question

I made the X button in the LineEdit, when i click on this button, the LineEdit is clear. But with my method, the X button looks a little big and not beautiful, I need to make it smaller. How I can do it?

myLineEdit = new LineEdit;
myLineEdit->setFixedHeight( 25 );
m_clear = m_lineEdit->addAction( QIcon( ":/clearButton" ), QLineEdit::TrailingPosition );

the size of clearButton.png is 12x12 px, so in this case it is enlarged and looks not beautiful like this.

the solution would be to modify the image so that the x has less size while maintaining the same size of the image. — eyllanesc, Aug 02 '18 at 09:20
@eyllanesc: thank you, I thought about that already. But don't we have solution with coding? Because what happen if in the future I set `myLineEdit->setFixedHeight( 50 );` then I have to change the size of the image again? Therefore I think the solution with coding would be better :) — songvan, Aug 02 '18 at 09:23
The solution that I proposed can be implemented in code, or without it. — eyllanesc, Aug 02 '18 at 09:28
What size do you want the icon to have? Do you want it to be the same height as the text or a bit smaller? If it is smaller, how much smaller? — eyllanesc, Aug 02 '18 at 09:30
The height of LineEdit is 25 so I want the height of the icon as original size (15*15) :) — songvan, Aug 02 '18 at 09:44
if the height of the QLineEdit is "H", what would be the size of the icon you want. — eyllanesc, Aug 02 '18 at 09:44

score 5 · Accepted Answer · answered Aug 02 '18 at 10:10

For this solution it is assumed that in the original image the relationship between the foreground size and the background is 1: 1 (this is normal in the icons), so the solution is to increase that relationship, for this we create a new image

QPixmap in(":/clearButton");
QPixmap out(in.size()*10/7);
QRect r= in.rect();
r.moveCenter(out.rect().center());
out.fill(Qt::transparent);

QPainter painter(&out);
painter.drawPixmap(r , in);
painter.end();

QLineEdit *m_lineEdit = new QLineEdit;
m_lineEdit->setFixedHeight(25);
m_lineEdit->addAction(QIcon(out), QLineEdit::TrailingPosition);

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How to make size of button in the LineEdit smaller?

1 Answers1