visible_when=False in Vgroup Tabbed still visible #758

fred4ets · 2020-03-09T15:11:28Z

Hi there,

I'm facing the following issue.

If i set 2 traits items and set one of them to be not visible, it is stil visible.

I join a CME to be more explicit : Tab #1 should be not visible.

What am I doing wrong?

Thanks in advance.

Regards

PS : Debian 10 x86_64 / Python 3.7.3, with Traits libs from git source (Traits 6.1.0 dev1414 & TraitsUI 6.2.0 dev123)

#! /usr/bin/env python3

from traits.api import Int, Float, HasTraits
from traitsui.api import (Group, HGroup, Item, Tabbed, VGroup, View)

class Foo(HasTraits):

    a = Int
    b = Float

    view = View(Tabbed(VGroup(HGroup(Item('a')),
                              label='Tab #1',
                              visible_when='False'),
                       VGroup(HGroup(Item('b')),
                              label='Tab #2',
                              visible_when='True')))

if (__name__ == '__main__'):
    foo = Foo()
    foo.configure_traits()

The text was updated successfully, but these errors were encountered:

fred4ets · 2021-04-23T06:47:29Z

Hello,

Any news about this issue?

Ok, I fix a few typo:

#! /usr/bin/env python3

from traits.api import Int, Float, HasTraits
from traitsui.api import (Group, HGroup, Item, Tabbed, VGroup, View)

class Foo(HasTraits):

    a = Int
    b = Float
    
    view = View(Tabbed(VGroup(HGroup(Item('a')),
                              label='Tab #1',
                              visible_when='False'),
                       VGroup(HGroup(Item('b')),
                              label='Tab #2',
                       visible_when='True')))

if (__name__ == '__main__'):
    foo = Foo()
    foo.configure_traits()

PS: It works fine with wx, this is only with qt4 I have this issue.

rahulporuri · 2021-05-03T05:48:46Z

@fred4ets thanks for providing a way to reproduce the issue. I can reproduce this issue on windows + python 3.6 + pyqt5 5.14.2 and qt 5.12.6

aaronayres35 · 2021-06-24T20:40:40Z

This appears to be relevant:
https://doc.qt.io/qt-5/qtabwidget.html#setTabVisible
but is new in Qt 5.15
It seems the old way of hiding / showing tabs is to entirely remove the tab while keeping a ref to it / its index, and then adding it back later with the https://doc.qt.io/qt-5/qtabwidget.html#removeTab and https://doc.qt.io/qt-5/qtabwidget.html#addTab methods

Also, I believe relevant traitsUI code is:

traitsui/traitsui/qt4/ui_panel.py

Lines 572 to 595 in 20f73e8

    
           elif group.layout in ("tabbed", "fold"): 
        
               # Create the TabWidget or ToolBox. 
        
               if group.layout == "tabbed": 
        
                   sub = QtGui.QTabWidget() 
        
               else: 
        
                   sub = QtGui.QToolBox() 
        
               # Give tab/tool widget stretch factor equivalent to default stretch 
        
               # factory for a resizeable item. See end of '_add_items'. 
        
               policy = sub.sizePolicy() 
        
               policy.setHorizontalStretch(50) 
        
               policy.setVerticalStretch(50) 
        
               sub.setSizePolicy(policy) 
        
               _fill_panel(sub, content, self.ui, self._add_page_item) 
        
               if outer is None: 
        
                   outer = sub 
        
               else: 
        
                   inner.addWidget(sub) 
        
               # Create an editor. 
        
               editor = TabbedFoldGroupEditor(container=sub, control=outer, ui=ui) 
        
               self._setup_editor(group, editor)

and specifically _fill_panel:

traitsui/traitsui/qt4/ui_panel.py

Lines 296 to 344 in 20f73e8

    
           def _fill_panel(panel, content, ui, item_handler=None): 
        
               """Fill a page based container panel with content. 
        
               """ 
        
               active = 0 
        
               for index, item in enumerate(content): 
        
                   page_name = item.get_label(ui) 
        
                   if page_name == "": 
        
                       page_name = "Page %d" % index 
        
                   if isinstance(item, Group): 
        
                       if item.selected: 
        
                           active = index 
        
                       gp = _GroupPanel(item, ui, suppress_label=True) 
        
                       page = gp.control 
        
                       sub_page = gp.sub_control 
        
                       # If the result is the same type with only one page, collapse it 
        
                       # down into just the page. 
        
                       if isinstance(sub_page, type(panel)) and sub_page.count() == 1: 
        
                           new = sub_page.widget(0) 
        
                           if isinstance(panel, QtGui.QTabWidget): 
        
                               sub_page.removeTab(0) 
        
                           else: 
        
                               sub_page.removeItem(0) 
        
                       elif isinstance(page, QtGui.QWidget): 
        
                           new = page 
        
                       else: 
        
                           new = QtGui.QWidget() 
        
                           new.setLayout(page) 
        
                       layout = new.layout() 
        
                       if layout is not None: 
        
                           layout.setAlignment(QtCore.Qt.AlignLeft | QtCore.Qt.AlignTop) 
        
                   else: 
        
                       new = QtGui.QWidget() 
        
                       layout = QtGui.QVBoxLayout(new) 
        
                       layout.setContentsMargins(0, 0, 0, 0) 
        
                       item_handler(item, layout) 
        
                   # Add the content. 
        
                   if isinstance(panel, QtGui.QTabWidget): 
        
                       panel.addTab(new, page_name) 
        
                   else: 
        
                       panel.addItem(new, page_name) 
        
               panel.setCurrentIndex(active)

Doing some debugging, I am seeing that the UI is getting the visible_when string added to _visible with an appropriate corresponding GroupEditor... I also verified that even if cond_value is False here:

traitsui/traitsui/ui.py

Line 800 in 20f73e8

cond_value = eval(when, globals(), context)

the tab remains visible.

It seems to me the TabbedFoldGroupEditor or its container which is a QTabWidget needs to be responsible for seeing if any of the wrapped GroupEditors have visible == False, and update accordingly.

Unfortunately, we don't end up keeping track of the wrapped GroupEditor for the tab:

traitsui/traitsui/qt4/ui_panel.py

Line 627 in 20f73e8

self._setup_editor(group, GroupEditor(control=outer))

(although a reference to it is kept in the _visible list on the UI). This makes it tricky, as I don't know who should be charged with listening to when {add/remove}Tab should be called...

In summary I don't think this is a simple quick fix 😞 but I will see if I can get something working

aaronayres35 · 2021-06-24T20:56:30Z

Also, when you first launch the tab is empty (as we correctly listen to visible_when):

but the tab itself is still visible even if its contents aren't and that is what we really want to not be visible. Also, clicking to the other tab and back, the content of tab 1 is then visible and will never become not visible again.

TThere is a disconnect between what traitsUI is trying to do and Qt below.

rahulporuri added the type: bug label May 3, 2021

corranwebster mentioned this issue May 18, 2021

GroupEditor does not call super() #1673

Open

aaronayres35 linked a pull request Jun 28, 2021 that will close this issue

Add support for {enabled/visible}_when for Tabbed and VFold #1705

Open

1 task

corranwebster added this to the Release 7.3.0 milestone Feb 1, 2022

mdickinson changed the title ~~visible_when=False in Vgroup Tabbed stiil visible~~ visible_when=False in Vgroup Tabbed still visible Feb 21, 2022

corranwebster modified the milestones: Release 7.3.0, Release 8.0 Feb 24, 2022

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visible_when=False in Vgroup Tabbed still visible #758

visible_when=False in Vgroup Tabbed still visible #758

fred4ets commented Mar 9, 2020 •

edited by rahulporuri

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fred4ets commented Apr 23, 2021 •

edited by rahulporuri

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rahulporuri commented May 3, 2021

aaronayres35 commented Jun 24, 2021 •

edited

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aaronayres35 commented Jun 24, 2021

visible_when=False in Vgroup Tabbed still visible #758

visible_when=False in Vgroup Tabbed still visible #758

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fred4ets commented Mar 9, 2020 • edited by rahulporuri Loading

fred4ets commented Apr 23, 2021 • edited by rahulporuri Loading

rahulporuri commented May 3, 2021

aaronayres35 commented Jun 24, 2021 • edited Loading

aaronayres35 commented Jun 24, 2021

fred4ets commented Mar 9, 2020 •

edited by rahulporuri

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fred4ets commented Apr 23, 2021 •

edited by rahulporuri

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aaronayres35 commented Jun 24, 2021 •

edited

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