On 24 Apr 2014, at 00:57, Alex Montgomery
<[email protected]<mailto:[email protected]>> wrote:
Hello,
While trying to style a ComboBox such that its text didn't elide and it didn't
have inexplicably large margins, I was surprised to learn that these two items
would be displayed entirely differently:
ComboBox { model: ["1", "2"] }
ComboBox { model: ["1", "2"]; style: ComboBoxStyle{} }
Which leads me to these questions:
- Is there a reason that a default constructed ComboBoxStyle (and other Qt
Quick style types) is not identical to the style of default constructed
ComboBox?
When you style the control you basically take complete control of it’s looks.
It is extremely hard to maintain partial fallbacks to native looks when some
things are touched and others are not and the visual result tend to depend on
the platform you run it on.
To get an idea, the only thing that is vaguely supported and working well this
way in widget style sheets is setting the text foreground colour. Pretty much
anything else will force the style sheet to draw the widget as a Windows 95
control as a common fallback on all platforms. Most native styles draw controls
using pixmaps and cannot be tweaked and modified in any useful way without
completely replacing the original styling.
When you actually do a custom theme, it is more reliable to have a consistent
appearance path on all platforms which is what the base style does. I think the
real issue here is why the native control is not eliding in the first place, so
fixing that would be the preferred solution. This is probably QStyle/platform
specific and should be filed as a separate issue.
- Is there a way for someone to define their own style that subtly tweaks the
default style without digging through Qt source code to find the actual default
properties?
I think the style classes would be far more useful if users could define
individual properties that they wanted to change without having to specify
every other property to match the (undocumented) properties set by the ComboBox
constructor.
I think the idea of tweaking existing native styles without replacing them
would be better solved by applying an object containing style hints that can be
respected or not depending on the platform you run on. That way I imagine you
would be able to set properties like “text-color”, “background” or
“border-type" property and allow the style to respect it if and only if it is
actually supported. We have a plan on supporting this through the “stylehints:
property but we have currently not yet determined exactly how inheritance or
selectors should be applied.
Regards,
Jens
Regards,
Alex
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