Missing style of QStandardItem built-in checkbox

[KcHNST]

Describe Your Environment

[Versions from your environment]

• QDarkStyle: 2.5.3
• OS: Win 7
• Python: 3.6.5
• PyQt: 5.10.1

Language

Python

Description / Steps to Reproduce

The built-in checkbox of QStandardItem does not used the styled checkbox whenever the check state is Qt::PartiallyChecked.

Actual Result

The problem checkbox shown among correctly styled checkboxes:

Expected Results / Proposed Result

The style should look like that of QCheckBox presumably?

[KcHNST]

Closed due to not being customize-able using a stylesheet.

[ColinDuquesnoy]

Reopening because I forget @aitormoreno actually found a solution in PR #67. I think he just forget the Indeterminate state. We should fix it.

[dpizetta]

I will check this as soon as possible, thanks

[KcHNST]

Something like this?

Idle:

QTreeView::indicator:indeterminate,
QListView::indicator:indeterminate {
    image: url(:/qss_icons/rc/checkbox_indeterminate.png);
}

Focus:

QTreeView::indicator:indeterminate:hover,
QTreeView::indicator:indeterminate:focus,
QTreeView::indicator:indeterminate:pressed,
QListView::indicator:indeterminate:hover,
QListView::indicator:indeterminate:focus,
QListView::indicator:indeterminate:pressed {
    image: url(:/qss_icons/rc/checkbox_indeterminate_focus.png);
}

[dpizetta]

Hi @KcHNST , could you add a PR for this? I think it is correct. Try to check if it works in your app. Tks again!