QTreeWidget + Transparent Selection

[Shamwow]

Hi, I'm a new member. I've been trying to figure this one out of a while. I'm using Qt4.4 and a QTreeWidget/QTreeWidgetItem. Within this widget the items have a different background color based on their state. When I select the items, I want the background color (set in QTreeWidgetItem) to bleed through into the selection color.

Anyone have any ideas on how to do this?

[caduel]

One way that works (did that once) is to implement a custom delegate and reimplement paint(): painting the selection background yourself and let the base class paint the rest (remove the QStyle::State_Selected flag).

HTH

[jpn]

Use style sheets (http://doc.trolltech.com/4.4/stylesheet.html), for example:


QTreeView::item:selected {
background: rgba(255, 0, 0, 50%);
}

[caduel]

ah, progress ;)

[Jennie Bystrom]

Use style sheets (http://doc.trolltech.com/4.4/stylesheet.html), for example:


QTreeView::item:selected {
background: rgba(255, 0, 0, 50%);
}


Does this really work? I have the exact problem and when I tried using stylesheets in this way, the colors are not really blended. Using the alpha factor only results in a lighter shade of the selection color. I'm using qtreeview with a qtablemodel returning the background color for different rows in the table depending on states.

Right now, I am struggling with my delegate, adding a custom paint-method, but I have to say I feel there should be a simpler way of doing this.

[Jennie Bystrom]

I solved the problem by reimplementing paint in my delegate and setting the palette's highlight role to the blended color before calling QItemDelegate::paint(...).