Styling QPushButton with CSS? - css

I'm trying to create a QPushButton that's just got an icon and a constant background color.
So that I can swap out the icon when the user clicks it, without any other apparent effects (this is for a roll-up/roll-down feature). I've added an entry like this to my stylesheet:
QPushButton.ToggleButton {
background-color: #8af;
}
and set the button's class to match, and this does indeed give me the look I want, except that when I click on it the background color changes to a lighter blue, which I don't want. What am I missing?
Edit: I guess I should mention I'm using Qt 4.5 and PyQt 4.6 to do this...

I know people like using stylesheets, but in this situation I think it is just as easy to make a custom button. Define a class that inherits from QAbstractButton, and override the paint() method. In the paint method, fill the rect with your desired background color, and then paint the current icon on top. It might be slightly more complicated if you want the border around the button as well, but not a lot.
Alternately, you could also look at the roles for QPalette, specifically QPalette::Light and QPalette::Midlight, which might be used to adjust the color of the button when pressed.

Answer
Try giving the button an ID with QObject::setObjectName and then applying the style with #idSelector?
In Python the code would probably look something like this:
button = QPushButton(self)
button.setObjectName("ToggleButton")
and stylesheet like this:
#ToggleButton:pressed {
background-color: #8af;
}
Further reading
The QFriendFeed example application at Forum Nokia is using Qt style sheets heavily to customize the UI.

I'm guessing doing background-color: #8af !important; would be too obvious so I'm assuming that doesn't work. It's worth a try if you haven't done it yet.
Otherwise, as noted in this question, there are specific states you can style. Try setting the same background color for the pressed state:
QPushButton.ToggleButton:pressed { background-color: #8af; }
Sorry if I misunderstood. Hope that helps.

open the button's stylesheet in Qt designer and try this:
QPushButton:pressed {
image: url(/path/to/your/file/fileName.png);
}

Related

Is there any solution to change color of QTableWidget's heads and items separately?

Is there any solution to change the font color of QTableWidget's heads and items separately using Qt Designer? I want to make a complete design in Qt Designer without using code to set any styles
I wanted to add this as a comment but unfortunately my reputation is too low.
This should be possible by using a Stylesheet in the property editor. I can't test it right now but I assume it should look like these:
QTableWidget {
color: red;
}
QHeaderView {
color: blue;
}
Edit: I saw later that you asked without using code to set any styles. This is as far as I know not possible. But you can set the Style in property editor as I suggested, s.t. you can see the changes in the Qt Designer directly.

Qt - How to change background from editable QComboBox?

I'm facing this problem when styling an editable QComboBox:
I'm unable to change the color of the grey box inside the QComboBox...
Any idea how to change it just with a stylesheet?
Thank you
What about
QComboBox:editable {
background: white;
}
? I did not test it, but the reference seems good to me.
Edit
As of using Qt version 5.6.2 the provided change works as desired. No differently colored box inside the currently edited QComboBox.
This shoud work
YourCombobox->findChild<QLineEdit*>()->setStyleSheet("QLineEdit {background: green;}");
Previous line get the reference to the QLineEdit which is part of the QComboBox widget and applies the style sheet to it, not to the combobox.
I don't know if this could also work, if you want to try it and give a feedback..
YourCombobox->setStyleSheet("QLineEdit {background: green;}");

Make Default Buttons Look Like Normal Buttons

I have a JavaFX button that has been set as Default Button so the user can select it with the Enter key. Currently, it has a blue background:
But I'd like to make it look like a normal button:
I took a look at the JavaFX CSS Guide and it looks like there's only one feature to override (-fx-base).
But changing this feature has unpredictable effects—sometimes it eliminates the button's gradient; sometimes it makes the button transparent.
Is there a simple way to just get rid of the Default Button styling?
My guess is that you are looking in the wrong style sheet. The old default style sheet caspian.css was replaced with modena.css. So setting default value for -fx-base from modena.css should fix the issue:
.button:default {
-fx-base: #ececec;
}

QPushButton stylesheet when setCheckable(true)

When I use
myButton->setCheckable(true);
There is -I don't know how to call it- a sort of grid :
Is it possible to not have this grid and here just my green background ?
Use the checked property:
QPushButton:checked{
background-color: ...
border: none;
}
Same applies for pressed if you want to alter that too.
Note: You can read all about the properties here (just search for QPushButton to find the properties that are part of the button. Removing the border seems to be necessary based on the documentation (otherwise the background colour might not be applied).

Qt: Background color on QStandardItem using StyleSheet

I have a class that inherits QStandardItem and I put the elements in a QTreeWidget. The class receives notifications from the outside and I want to change the background color of the item based on what happened.
If I do not use stylesheets, it works just fine, like this:
void myClass::onExternalEvent()
{
setBackground(0, QColor(255,0,0)));
}
However, as soon as I put a stylesheet on the QTreeWidget, this has no effect : the stylesheet seems to override the setBackground() call.
So I tried :
void myClass::onExternalEvent()
{
this->setStyleSheet("background-color: red");
}
but this is probably all wrong, it changed the color of some other element on my screen, not sure why.
Does anyone have an idea on how I can alter the background color like with setBackgroundColor but still be able to use stylesheet on my QTreeWidget?
Palettes propagate to the children of a widget, and it's bad to mix and match style-sheet controls and native controls (I do not have a citation for the latter handy, but I have read it in the QT docs somewhere).
That being said, try setting setAutoFillBackground(false) on your QStandardItem derived class.
EDIT: Sorry - also, are you specifying the QTreeWidget in the stylesheet or just setting "background-color:"? If you specify the QTreeWidget only in the stylesheet that might take care of it as well.
QTreeWidget { background-color: white; }
But I think you still have to set the autoFillBackground(false).

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