Select Disabled Actions in QMenu via Stylesheet - c++

In my project I customized a QMenu using stylesheets to have the color and spacing attributes I want. However, upon doing so, disabled actions no longer look any different from enabled actions.
Before:
After:
As you can see, the disabled actions look the exact same as enabled ones, and I can't seem to figure out a way to select disabled actions via stylesheets.
Here is my current stylesheet for the QMenu
QMenu{width: 115px; background: #373f49; color: #bfbfbf; margin: 0px;}
QMenu::item{padding: 4px 18px 4px 30px; border: 0px solid transparent; margin: 0px;}
QMenu::icon{margin-left: 10px;}
QMenu::item:selected{background: #47505c; color: #fff;}
Thanks for your time.

Use the disabled selector:
QMenu::item:disabled{background: #ffffff; color: #000000;}

Related

Why does adding stylesheet to QListView change behavior that is not determined by the style sheet itself?

I have a QListView to which I added line separators using the following stylesheet:
listView_->setStyleSheet("QListView::item { border-bottom: 1px solid black; padding: 2px; }");
However something unexpected has happened - on single click on any item in the list, the data vanishes from the display. It comes back on a double click. This is quite weird I think. Why is this happening ?
Here is the QListView
This is what happens as soon as I click on any item:
The data that has just vanished, comes back when I double click (instead of a single click - or selection action)
Why is this happening and how can I avoid it ?
Each item in the view has states, for example a selected state represents an item that is currently selected. Now, if you look at the list without any stylesheet attached, you will notice that selected items have dark blue background and white text. However, when you are assigning this stylesheet
QListView::item { border-bottom: 1px solid black; padding: 2px; }
you are in fact modifiing all states at once, including the selected state, which causes it to have the default white background along with the white text. For example, if you add another property:
QListView::item { border-bottom: 1px solid black; padding: 2px; background:red; }
you will notice, that all items (both selected and not selected ones) will have red background. To fix the issue, you should specify that your stylesheet must be applied only to items that are not selected
QListView::item:!selected{ border-bottom: 1px solid black; padding: 2px; }

qt widen QScrollBar when hover using StyleSheet

I'm trying to change the width of a vertical QScrollBar with a custom stylesheet like
QScrollBar:vertical
{
border: 2px solid grey;
background: #32CC99;
width: 10px;
margin: 22px 0 22px 0;"
}
QScrollBar:vertical:hover {
background: red;
width: 25px ;
}
It doesn't work. Did I make any mistake? Can't we change the width of widget in run-time?
You should try
QScrollBar::handle:hover {
background: red;
width: 25px;
}
It works for me
I don't think there is a way of doing this by using the stylesheets alone.
You could create your own scrollbar and override the enterEvent and leaveEvent and change the stylesheet there.
You could also install an event filter to your existing scrollbar (you can get your scrollbar by using the QAbstractScrollArea::verticalScrollBar() function) and listen to the same events and change the stylesheet there.

How does view's stylesheet interact with model's ::FontRole in Qt model/view environment?

What happens when font family and size supplied by stylesheet of QTreeView differ from the ones returned by the model assigned to it? So far it seems like model's data overrides stylesheet settings. How do I change font of a view with a custom model assigned to it then?
Or to be more precise: if I know I want to style the view with stylesheet - what do I return from model when ::FontRole is requested?
UPD: just in case I am doing something stupid, here is my stylesheet that I assign to qtreeview:
QTreeView::item:selected
{
color: black;
font-family:"Times New Roman", Times, serif;
}
QTreeView::item:has-children
{
font-family: "Comic Sans MS", cursive, sans-serif;
height: 25px;
border-bottom: 1px solid;
border-bottom-color: green ;
border-top: 1px;
}
After some asking around and googling it turned out that styling text in QTreeView should be done on QTreeView instead of QTreeView::item

QTabBar::setTabButton center button

I'm trying to customize a QTabBar button in Qt/C++ by making it show up as italic and the only way I've found is to use setTabButton and give it a custom widget, which is a QLabel in my case. However, setTabButton's position parameter only has Left or Right as options (See code below). Now it looks weird next to the other tabs which are all centered.
tab_bar->setTabButton(index, QTabBar::RightSide,((QWidget*)(tab_label)));
Note, there is a stylesheet applied to the whole application... not sure if that would cause the issue to be more apparent.
Stylesheet for that label is:
QLabel#GrainButton {
background-color: transparent;
border: 0px solid transparent;
margin: 0px;
padding: 0px;
min-width: 20px;
border: 0px solid transparent;
border-radius: 0px;
}
Any thoughts of how to center this?
You can create a custom widget instead of your QLabel. In this widget you can set a QHBoxLayout with 2 placeholders widgets.
QHBoxLayout:
PlaceHolder( sizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed); )
YourLabel
PlaceHolder( sizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed); )
This may place your widget in the center.
Inherit QProxyStyle and override drawItemPixmap, the pixmap will shown in the center.

Difficulty styling a QTreeView with stylesheets

I'm trying to make the parent items in my QTreeView taller, have larger fonts, a custom expanded/collapsed icon in the right and be underlined. Here's my style sheet so far:
QTreeView::item:has-children
{
font: bold 24px;
height: 20px;
border-bottom: 2px groove lightgray;
}
QTreeView::branch:closed:has-children
{
border-bottom: 2px groove lightgray;
image: url(:/images/collapsed.png);
}
QTreeView::branch:open:has-children
{
border-bottom: 2px groove lightgray;
image: url(:/images/expanded.png);
}
Some of the styles are working. The underline on the branch and item only appears when the item has children which is what I wanted. The icon has changed which is also good. However, the "height" and "font" are not being respected and all items have the same height and font. QTreeView::item:has-children seems valid because the border-bottom is respected. If I set "height" for simply "QTreeView::item", all items get that height but "font" still doesn't work. Can anybody help me with the syntax here?
The tree view has the following properties set in designer:
frameShape: NoFrame
frameShadow: Plain
editTriggers: NoEditTriggers
selectionMode: NoSelection
animated: true
headerHidden: true
The rest of the properties are defaults