QPushButton icon auto resize

Romain C

Hi everyone,
I'm using QT from few months and I encounter a little problem when using QPushButton.
I create my GUI from the code , I'm not using QTCreator wysiwyg or QTQuick.

For example:

QGridLayout* pLayout             = new QGridLayout   ( this );

QPushButton pZRegistration  = new QPushButton   ( );
pZRegistration  ->setFlat          ( true );
pZRegistration  ->setToolTip   ( QString       ( "Recalage en Z" ) );
pZRegistration  ->setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
pZRegistration  ->setIcon        ( QIcon         ( ":/Images/Volume.png" ) );
connect                         ( pZRegistration  , SIGNAL( clicked( ) )
                                , this          , SLOT  ( registrationAlongZ( ) ) );
pLayout->addWidget              ( pZRegistration  , 0, 0 );

QPushButton pTRegistration  = new QPushButton   ( );
pTRegistration  ->setFlat          ( true );
pTRegistration  ->setToolTip   ( QString       ( "Recalage en T" ) );
pTRegistration  ->setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
pTRegistration  ->setIcon         ( QIcon         ( ":/Images/Time.png" ) );
connect                                     ( pTRegistration  , SIGNAL( clicked( ) )
                                , this          , SLOT  ( registrationAlongT( ) ) );
pLayout->addWidget              ( pTRegistration  , 0, 1 );

setLayout                       ( pLayout );

When I use this exemple, the two QPushButton propagate themselves based on layout. That's perfect!

The real problem is that my icon keep to be small inside my QPushButton.

I tried the solution at this topic: https://forum.qt.io/topic/7978/icon-in-pushbutton-does-not-resize/5
Catching the resize event of my pushbuttons and resizing icon.

When I used this solution I got another problem, my QGridLayout constraints are not respected : PushButtons are growing until others components are at them minimum size ( rowStretch/columsStrech are not respected and other trouble using subWidgets...).

Are there a good (perfect?) way to do this properly?
Thanks a lot!

Romain C

After all this time, I don't fin a way to do it properly.

I'm using QML and it's fine now. For people intereested in, this is my QML component:

import QtQuick 2.5
import QtQuick.Controls 1.4
import QtQuick.Controls.Styles 1.4

Button
{
property color backgroundColor
property alias tooltip : buttonAction.tooltip
property string imageSource
signal buttonClicked ( )

action              : buttonAction
activeFocusOnPress  : true
Keys.onPressed      :
{
    if ( (event.key == Qt.Key_Return||event.key == Qt.Key_Enter) && activeFocus)
    {
        buttonClicked ( );
        event.accepted = true;
    }
}
style               :
ButtonStyle
{
    background:
	
	Rectangle
    {
		id			: backgroundRectangle
		color       : backgroundColor
		Rectangle
		{
			id				: roundedRectangle
			color           : control.pressed?Qt.darker(backgroundColor, 1.1):backgroundColor
			anchors.fill    : parent
			radius          : 10
			scale           : ( control.hovered||control.activeFocus )?1:0.9
			Image
			{
				id          : buttonImage
				anchors.fill: parent
				fillMode    : Image.PreserveAspectFit
				source      : imageSource
			}
		}
	}
}

Action
{
    id          : buttonAction
    onTriggered : buttonClicked ()
}

}