Hi Justin,
thank you again for taking the time to explain using
QItemDelegate to me. Would it be possible for you to explain to me what you
mean by " For more expensive calls or things where the value doesn't
change, you can compute them once ahead of time."? just want to understand
the scenario that you're speaking of.
Regarding the tutorial you speak of, I'm assuming it's the
PyQT UI Tutorial on cmivfx?
Thank you
Gann Boon Bay
On Sun, Sep 7, 2014 at 12:41 PM, Justin Israel <[email protected]>
wrote:
> @Marcus, I believe based on the example code that a different image is
> meant to be used dynamically for each item. That is, unless I read the
> example wrong.
>
> @Bay, since you can only assign one delegate per row/column, you would
> need to have all of you conditions in that same delegate. Just be very
> mindful of what you do in a paint method. It gets called very often and you
> don't want to do anything that takes a lot of time otherwise it will lag.
> For more expensive calls or things where the value doesn't change, you can
> compute them once ahead of time.
>
> I tend to use both style sheets and paint logic. Stylesheets are great for
> overall custom looks and behavior, but obviously they can only express
> logic within the ability of css. If you end up wanting to draw anything
> more custom, then paint logic let's you do basically thing you want. I did
> an example of this in my PyQt video where I made a custom gauge widget. I
> also use custom paint delegates for stuff like drawing special progress
> bars in views or different types of dynamic state indicators.
> On 8/09/2014 5:23 AM, "Marcus Ottosson" <[email protected]> wrote:
>
>> Hi Bay,
>>
>> Am I understanding you correctly in that you want to have an image appear
>> when the user hovers an item, and have another image appear when he exits?
>> You can do something like this:
>>
>> QListWidgetItem {
>> background-image: url(my_image.png)}
>> QListWidgetItem:hover {
>> background-image: url(my_hover_image.png)}
>> QListWidgetItem:checked:hover {
>> background-image: url(my_checked_hover_image.png)}
>>
>> Where “my_image” is an image path relative to where you ran the script.
>>
>> I personally avoid any styling in Python and haven’t yet found a reason
>> to since I started using Stylesheets, they rock!
>>
>>
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