I'm using QtRuby with Qt 4.8.6 and trying to create a tree view where each item has a custom icon between the tree controls and the name. The end result should be like this:
I am getting space allocated for where the icon should go, but I'm not seeing any icons. What do I have to do to get them to show up?
这是我的代码(稍微简化以消除无数据边缘情况):
class MyModel < Qt::AbstractItemModel
# ...
def data(index, role)
case role
when Qt::DisplayRole
case index.column
when 0; Qt::Variant.new(index.internalPointer.displayName)
when 1; Qt::Variant.new(index.internalPointer.displayType)
end
when Qt::DecorationRole
if index.column==0 then
# Just testing to show a static icon for all items
Qt::Pixmap.new(':/resources/images/Objects-Scene-Normal.png')
end
end
end
end
@mytreeview.model = MyModel.new
如果您想检查 Qt Designer.ui
文件(如果树视图需要设置我没有的属性)它可以是在这里看到 https://github.com/Phrogz/RUIC/blob/7bd95fcc7936e19a9b755e2da70769a02a75e123/gui/window.ui.
显然是QPixmap
需要包裹在一个QVariant
才能正常工作。这是在 QtRuby 中通过使用完成的Qt::Variant.fromValue()
:
when Qt::DecorationRole
if index.column==0 then
Qt::Variant.fromValue( Qt::Pixmap.new(':/path/to/resource') )
Credit to andre and peppe on #qt irc.freenode.net for helping with this.
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