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[Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should sh
From: |
Dan Sebald |
Subject: |
[Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is |
Date: |
Mon, 9 Apr 2018 04:07:00 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0 |
Follow-up Comment #18, bug #53443 (project octave):
Oh. Yeah, that doesn't appear to work. I've printed out
for (int i=0; i < tbar->count (); i++)
{
std::cerr << "void* cast: " << tbar->tabData(i).value<void*> () << "\n";
if (tbar->tabData(i).value<void*> () == this)
{
std::cerr << "FOUND THE ONE\n";
tbar->setCurrentIndex (i);
return;
}
}
which results in
>> x = magic(5);
>> openvar x;
>> void* cast: 0
void* cast: 0
void* cast: 0
void* cast: 0
void* cast: 0
void* cast: 0
>From the documentation:
http://doc.qt.io/qt-5/qvariant.html#value
"Returns the stored value converted to the template type T. Call canConvert()
to find out whether a type can be converted. If the value cannot be converted,
a default-constructed value will be returned."
It's returning a value of 0 (the default) because Qt isn't allowing that type
of conversion. Generally, from the looks of it, Qt doesn't like values being
converted to pointers.
With that in mind, I think what I had in the changeset of Comment #11 is
probably the most sound. Converting a pointer to a ULongLong QVariant is
probably not considered bad by Qt. Somehow Qt must be doing that kind of
thing in the QTabBar code when a new widget is added, and what I've done is
likely how Qt developers have done it.
Now, given what I printed out--i.e., that the value<void*> is producing 0--one
would think that the webinfo::current_tab_changed() routine would crash.
However, I don't see anywhere in the code where this object is actually
instantiated so don't know where to look to test it.
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- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, (continued)
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, Dan Sebald, 2018/04/08
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, Dan Sebald, 2018/04/08
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, Dan Sebald, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, Dan Sebald, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, Dan Sebald, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, Mike Miller, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, Dan Sebald, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, Mike Miller, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, Dan Sebald, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, Mike Miller, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is,
Dan Sebald <=
- [Octave-bug-tracker] [bug #53443] Variable Editor: openvar VAR should show the tab on which the variable editor is, John W. Eaton, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Compile warning when casting QVariant to (QWidget *), Rik, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Compile warning when casting QVariant to (QWidget *), Dan Sebald, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Compile warning when casting QVariant to (QWidget *), Mike Miller, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Compile warning when casting QVariant to (QWidget *), Dan Sebald, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Compile warning when casting QVariant to (QWidget *), Dan Sebald, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Compile warning when casting QVariant to (QWidget *), Mike Miller, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Compile warning when casting QVariant to (QWidget *), Dan Sebald, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Compile warning when casting QVariant to (QWidget *), Dan Sebald, 2018/04/09
- [Octave-bug-tracker] [bug #53443] Compile warning when casting QVariant to (QWidget *), Mike Miller, 2018/04/09