Display of wxStaticText in GTK+3 Topic is solved

Do you have a typical platform dependent issue you're battling with ? Ask it here. Make sure you mention your platform, compiler, and wxWidgets version.
raananb
Super wx Problem Solver
Super wx Problem Solver
Posts: 488
Joined: Fri Oct 27, 2006 4:35 pm
Location: Paris, France
Contact:

Display of wxStaticText in GTK+3

Post by raananb »

On Mint 19.3, with GTK+3 and wxWidgets-3.1.3, a wxStaticText is created with the following statement:

Code: Select all

label_QuotesOn = new wxStaticText( itemDialog1, wxID_STATIC, _("Latest_quote: 99-99-9999 99h99"), wxDefaultPosition, wxDefaultSize, 0 );
label_QuotesOn->Show(false);
itemBoxSizer3->Add(label_QuotesOn, 0, wxALIGN_CENTER_HORIZONTAL|wxALL, 5);
'label_QuotesOn' is hidden since the date will only be known later in the application. The initial value corresponds to the Date/Time format which the object will take later on, and wxRESERVE_SPACE_EVEN_IF_HIDDEN is set for this object.

In the course of execution of the application, 'label_QuotesOn' is modified by the following code:

Code: Select all

wxString lastQuote = m_data.ShareQuoteDates->Last(); // '20/03/2020 17h43'
lastQuote.Replace("/","-"); // '20-03-2020 17h43'
    
wxString label = label_QuotesOn->GetLabel(); // 'Latest_quote: 99-99-9999 99h99'
    
int pos = label.Find("9");

label.Truncate(pos);
label.Append(lastQuote); // Should be 'Quotes on: 20-03-2020 17h43'

label_QuotesOn->Show();    
label_QuotesOn->SetLabel(label);
label_QuotesOn->Fit();

Fit();
Layout();
Refresh();
Update();
The debugger shows that 'label' taks the expected value ('Latest_quote: 20-03-2020 17h43');

Code: Select all

Thread 1 "AccountsManager" hit Breakpoint 1, RapportPortefeuille::OnTimerSharesQuotes (this=0x5555563b9400, event=...) at rapportportefeuille.cpp:505
505	    lastQuote.Replace("/","-");
(gdb) p lastQuote
$1 = {static npos = 18446744073709551615, m_impl = L"20/03/2020 17h43", 
  m_convertedToChar = {m_str = 0x0, m_len = 0}}
(gdb) n
507	    wxString label = label_QuotesOn->GetLabel(); // "Latest_quote: 99-99-9999 99-99"
(gdb) p lastQuote
$2 = {static npos = 18446744073709551615, m_impl = L"20-03-2020 17h43", 
  m_convertedToChar = {m_str = 0x0, m_len = 0}}
(gdb) n
509	    int pos = label.Find("9");
(gdb) p label
$3 = {static npos = 18446744073709551615, 
  m_impl = L"Latest_quote: 99-99-9999 99-99", m_convertedToChar = {
    m_str = 0x0, m_len = 0}}
(gdb) n
511	    label.Truncate(pos);
(gdb) n
512	    label.Append(lastQuote);
(gdb) n
514	    label_QuotesOn->SetLabel(label);
(gdb) p label
$4 = {static npos = 18446744073709551615, 
  m_impl = L"Latest_quote: 20-03-2020 17h43", m_convertedToChar = {
    m_str = 0x0, m_len = 0}}
(gdb) c
However, the display shows an incomplete value for 'label': 'Latest quote:'

http://www.pixname.com/0001/Screenshot% ... -09-37.png

On Windows & OSX this code produces the expected display. Is there any reason why GTK+3 does not?
Last edited by doublemax on Sun Mar 22, 2020 6:37 pm, edited 1 time in total.
Reason: fix image link
ONEEYEMAN
Part Of The Furniture
Part Of The Furniture
Posts: 7458
Joined: Sat Apr 16, 2005 7:22 am
Location: USA, Ukraine

Re: Display of wxStaticText in GTK+3

Post by ONEEYEMAN »

Hi,
What is an exact GTK+ version do you use?
What happens if you omit wxRESERVE_SPACE_EVEN_IF_HIDDEN?

Thank you.
raananb
Super wx Problem Solver
Super wx Problem Solver
Posts: 488
Joined: Fri Oct 27, 2006 4:35 pm
Location: Paris, France
Contact:

Re: Display of wxStaticText in GTK+3

Post by raananb »

Hi and thanks for responding

Everything was built with GTK+3, but I do not know how to determine a finer definition of the version.

wxRESERVE_SPACE_EVEN_IF_HIDDEN seems to have no effect, the result is the same if it is set or not.
User avatar
doublemax
Moderator
Moderator
Posts: 19114
Joined: Fri Apr 21, 2006 8:03 pm
Location: $FCE2

Re: Display of wxStaticText in GTK+3

Post by doublemax »

Code: Select all

label_QuotesOn->Show();    
label_QuotesOn->SetLabel(label);
label_QuotesOn->Fit();

Fit();
Layout();
Try to print the value of "label_QuotesOn->GetSize().x" and "label_QuotesOn->GetMinSize().x" after each of these steps. Maybe it gives a clue.
Use the source, Luke!
ONEEYEMAN
Part Of The Furniture
Part Of The Furniture
Posts: 7458
Joined: Sat Apr 16, 2005 7:22 am
Location: USA, Ukraine

Re: Display of wxStaticText in GTK+3

Post by ONEEYEMAN »

Hi,
In the meantime why not use a read-only wxDateTimePicker?

Thak you.
raananb
Super wx Problem Solver
Super wx Problem Solver
Posts: 488
Joined: Fri Oct 27, 2006 4:35 pm
Location: Paris, France
Contact:

Re: Display of wxStaticText in GTK+3

Post by raananb »

@ONEEYEMAN: The value I am inserting comes from the web, so a picker is not relevant.

@doublemax, your hunch was correct.

I inserted wxMessageBoxes (the numbers 513,515... are of the code lines):

label.Truncate(pos);
label.Append(lastQuote);
wxMessageBox(wxString::Format("513 %d %d",label_QuotesOn->GetSize().x, label_QuotesOn->GetMinSize().x));
label_QuotesOn->Show();
wxMessageBox(wxString::Format("515 %d %d",label_QuotesOn->GetSize().x, label_QuotesOn->GetMinSize().x));
label_QuotesOn->SetLabel(label);
wxMessageBox(wxString::Format("517 %d %d",label_QuotesOn->GetSize().x, label_QuotesOn->GetMinSize().x));
label_QuotesOn->Fit();
wxMessageBox(wxString::Format("519 %d %d",label_QuotesOn->GetSize().x, label_QuotesOn->GetMinSize().x));

the results are:
513 201 -1
515 201 -1
517 289 -1
519 289 -1

I noted that
when at line 515, the display is of the label just after truncation.
when at line 517 the display becomes full, as expected

Somehow wxMessageBox makes the problem disappear.

The problem is solved (after removing wxMessageBox statements) with

label_QuotesOn->SetMinSize(wxSize(289,-1));

However, 289 has to be put in manually. The following sequence does not work.

label_QuotesOn->SetLabel(label);
int w = label_QuotesOn->GetSize().x;
label_QuotesOn->SetMinSize(wxSize(w,-1));
label_QuotesOn->Fit();label_QuotesOn->Show();
label_QuotesOn->Centre();

Edit:
changing
int w = label_QuotesOn->GetSize().x; to
const int w = label_QuotesOn->GetSize().x;
makes no difference.
But changing
int w = label_QuotesOn->GetSize().x; to
const int w = 289;
works.

How can I set the minsize dynamically, once the real size is known?

This problem does not exist in Windows/Osx, where the sizing is automatic ; should it be considered a GTK+3 bug?
Last edited by raananb on Mon Mar 23, 2020 9:59 am, edited 2 times in total.
ONEEYEMAN
Part Of The Furniture
Part Of The Furniture
Posts: 7458
Joined: Sat Apr 16, 2005 7:22 am
Location: USA, Ukraine

Re: Display of wxStaticText in GTK+3

Post by ONEEYEMAN »

Hi,
Can you try to find the GTK version with this link?

Thank you.
raananb
Super wx Problem Solver
Super wx Problem Solver
Posts: 488
Joined: Fri Oct 27, 2006 4:35 pm
Location: Paris, France
Contact:

Re: Display of wxStaticText in GTK+3

Post by raananb »

Hi,
Link missing
Thanks
DavidHart
Site Admin
Site Admin
Posts: 4252
Joined: Thu Jan 12, 2006 6:23 pm
Location: IoW, UK

Re: Display of wxStaticText in GTK+3

Post by DavidHart »

Hi,
Everything was built with GTK+3, but I do not know how to determine a finer definition of the version.
Two answers:

1) The standard way, on a debianish distro like ubuntu, is to ask 'apt'. I just did here (debian buster):
apt policy libgtk-3*
which produced lines like:
Installed: 3.24.5-1
but a simpler, gui way is to search using synaptic.

2) For any running wx program, do Ctrl-Alt-Middleclick over it. That should produce a dialog with the wx version information, and also the gtk+ versions used both to build and to run the program.

Regards,

David
raananb
Super wx Problem Solver
Super wx Problem Solver
Posts: 488
Joined: Fri Oct 27, 2006 4:35 pm
Location: Paris, France
Contact:

Re: Display of wxStaticText in GTK+3

Post by raananb »

Surfing the internet, I came across the issue webkit/webkit2: webkit is single process and webkit2 is multiprocess, which can explain the unexpected display.

How can I control the webkit which is used?
raananb
Super wx Problem Solver
Super wx Problem Solver
Posts: 488
Joined: Fri Oct 27, 2006 4:35 pm
Location: Paris, France
Contact:

Re: Display of wxStaticText in GTK+3

Post by raananb »

apt policy libgtk-3* produces

Installed: 3.22.30-1ubuntu4
ONEEYEMAN
Part Of The Furniture
Part Of The Furniture
Posts: 7458
Joined: Sat Apr 16, 2005 7:22 am
Location: USA, Ukraine

Re: Display of wxStaticText in GTK+3

Post by ONEEYEMAN »

Hi,
3 questions:

1. Why do you play with all those truncation:

Code: Select all

wxString label = label_QuotesOn->GetLabel(); // 'Latest_quote: 99-99-9999 99h99'
    
int pos = label.Find("9");

label.Truncate(pos);
label.Append(lastQuote); // Should be 'Quotes on: 20-03-2020 17h43'
Why not just do:

Code: Select all

label = lastQuote;
?

2.

Code: Select all

label_QuotesOn->Show();    
label_QuotesOn->SetLabel(label);
label_QuotesOn->Fit();
What happens if you call "SetLabel()" first?

It is possible that GTK is waiting for the label to be displayed in order to calculate the proper size of the text.

3. Why did you say:
@ONEEYEMAN: The value I am inserting comes from the web, so a picker is not relevant.
?

It doesn't matter where the date is coming from. This is the date/time object and the best way to display it is either wxCalendarCtrl or wxDateTimePicker. It can be read-only or disabled to indicate there shouldn't be any editing. But it's a natural choice.

Thank you.
raananb
Super wx Problem Solver
Super wx Problem Solver
Posts: 488
Joined: Fri Oct 27, 2006 4:35 pm
Location: Paris, France
Contact:

Re: Display of wxStaticText in GTK+3

Post by raananb »

@ONEEYEMAN
Hi,

1.
The original code was very simple:
wxString label = "Values on: *";
label.Replace("*",m_data.ValuesDate); // this explains why a picker is not appropriate.
label_ValuesOn->SetLabel(label);

That works fine on Window and OSX, and I exepcted it to work on GTK, but it does not.

I then tried to do things differently for GTK:

I created the wxStaticText with "Values on: 99-99-9999 99h99", hoping that this will ensure a correct size.
I then replaced the pattern '99-99-9999 99h99' with a date (european non-Iso format, eg '24-03-2020 15h23').

This does not work either, and the only display I am getting is of "Values on: ".

2. I tries different sequences, including the one you suggest, but none worked.

Now, when I inserted the wxMessageBox statement (see earlier post), the display became correct.

The display also became correct when I inserted SetMinSize(wxSize(289,-1)).

It did not work when the size was inserted dynamically, by inserting in different code sequences:
int w = label_ValuesOn->GetSize().x;
label_ValuesOn->SetMinSize(wxSize(w,1));

This makes me think that the problem may come from the webkit. webkit2 is described (in https://stackoverflow.com/questions/196 ... -gtk2-gtk3) as multi-process, contrary to webkit1 which is described as monoprocess. The process retrieving the 'label' value after it is truncated, not waiting for it to be completes with the date. The fact that the display bacame correct when wxMessageBox or SetMinSize(wxSize(289,-1)) may indicate a process which behaves differently.

If you know how to force the use of webkit1 instead of webkit2, please let me know.

Thanks.
User avatar
doublemax
Moderator
Moderator
Posts: 19114
Joined: Fri Apr 21, 2006 8:03 pm
Location: $FCE2

Re: Display of wxStaticText in GTK+3

Post by doublemax »

Webkit is the browser component. It's not relevant here.
Use the source, Luke!
ONEEYEMAN
Part Of The Furniture
Part Of The Furniture
Posts: 7458
Joined: Sat Apr 16, 2005 7:22 am
Location: USA, Ukraine

Re: Display of wxStaticText in GTK+3

Post by ONEEYEMAN »

Hi,
Moreover, WebKit1 is outdated and is not supported anymore.

Now I still don't understand why you need the wxStaticText.
You can use read-only disabled wxDatePicker + wxTimePicker.

Thank you.
Post Reply