QToolButton icon scaled down on Windows - why?

SGaist

Hi,

Could you check whether both returns the same iconSize ?

janfaroe

Both places return QSize(32, 32) , which makes sense, since I'm setting the size with setIconSize(QSize(32, 32)) .

Windows:
!http://i39.tinypic.com/2qbvm2t.png()!

Mac:
!http://i39.tinypic.com/30c4t9t.png()!

Edit: I should perhaps mention that the buttons are added to the toolbar portion of a window, and then grouped with a QButtonGroup.

NicuPopescu

bq. Edit: I should perhaps mention that the buttons are added to the toolbar portion of a window, and then grouped with a QButtonGroup

I guess the tool bar's icon size is applied just to its children if applicable, and is N/A for the button group(it hasn't an iconSize to propagate to its children on) ... so you need to set the icon size expplicitely to each tool button and it would work

janfaroe

As stated two times before, I am setting the icon sizes explicitly with setIconSize(QSize(32, 32)) ;-)

Edit: Setting the icon sizes after adding to the toolbar has no effect.

Also, this works ok on Mac OS. Only not on WIndows.

NicuPopescu

ah, ok ... I have thought you setIconSize by tool bar

but anyway I tested this and it works:

@
ui->setupUi(this);
QToolButton *button1 = new QToolButton;
QToolButton *button2 = new QToolButton;
QToolButton *button3 = new QToolButton;
QGroupBox *groupBox = new QGroupBox();
button1->setText("Button 1");
button1->setIconSize(QSize(32,32));
button1->setIcon(QIcon("test.ico"));
button2->setText("Button 2");
button3->setText("Button 3");
QHBoxLayout *hbox = new QHBoxLayout;
hbox->setContentsMargins(0, 0, 0, 0);
hbox ->addWidget(button1);
hbox ->addWidget(button2);
hbox ->addWidget(button3);
groupBox->setLayout(hbox);
ui->mainToolBar->addWidget(groupBox); @

janfaroe

NicuPopescu: And the icon is indeed shown as 32x32 and is not scaled down? What Qt version are you using? OS? I'm on 5.2 beta.

NicuPopescu

yes!
I tested with qt 5.1.1 mingw and qt 5.2.0 beta VS 2010 on Windows XP ... on both it's working fine

janfaroe

Bingo - the QGroupBox did the trick. Thanks!

I'm not sure why it does a difference though. As you, I am adding the buttons to a QToolBar.

SGaist

Sounds like it could be a Windows specific bug. Did you check on the "bug report system":http://bugreports.qt-project.org whether something like that was reported ?

janfaroe

I was not sure whether it was/is me that was on the wrong side of the street. A search for "windows qtoolbutton icon size" does not give any results.

SGaist

Not necessarily, there can be regressions/subtle differences between platforms.

Then you can open a new report with a minimal compilable example that helps reproduce the behavior. Providing the link here would be a plus

janfaroe

Yes, a bug report seems appropriate. Looking closer, enclosing the QButtons in QGroupBox changes the look of the buttons. This is of course notable on the Mac as well.

janfaroe

Done.

https://bugreports.qt-project.org/browse/QTBUG-35780

janfaroe

Seems like it's a problem on Windows 7 as well. Added this to the bug report. I could sort of accept that this was a problem on XP only, but not across the whole Windows line as it seems. I'm wondering why no-one else notices things like this? Given the amount of bug reports from me alone regarding widgets (especially on the Mac), I'm gonna hit an email to Digia, having ranted basically everywhere else about the state of Widgets and desktop platforms to no avail. This is soooo frustrating!