vector<string> in wxComboBox

Question

I hope my question is not to localized... But I think some other will stumble about this or a similar problem.

I want to create a vector which contains all available ports at my system (this works in a console app). After that I want to copy the vectorelements in a wxString-Array to get them in a wxComboBox.

So, in my particular case I get two errors:

the variablename of the vector is not known in wxWidgets
by copying, the wxString will cast my string into a wchar_t (I know, wchar_t and wxString are similar...)

I will add some of my Code, so you will have a better sight about the problem:

first problem

std::vector<std::string> v_ports; v_ports.push_back = "Com1"; v_ports.push_back = "Com4";

--> error: 'v_ports' does not name a type (hint: that is a example, in the hole programm I will use a function to get the strings)

second problem

wxString sect_opt[v_ports.size()]; for(int i = 0; i < v_ports.size(); i++) sect_opt[i] = _T(v_ports[i]);

--> error: 'Lv_ports' was not declared in this scope

I'm using: IDE: CodeLite 5.1; wxW 2.9.4; @Win8.1

O my God... I must have get to less sleep... but it's doesn't fix the problem — Casisto
– Casisto, Commented May 30, 2014 at 7:18
nothing wrong with your first problem now, see: ideone.com/s5LRGx — Deqing
– Deqing, Commented May 30, 2014 at 7:35
@Dequing: if you has try it out in a console-app you will get no error, I've first create my function as console-app, but when I try to use the function with wxW the error raise. — Casisto
– Casisto, Commented May 30, 2014 at 8:16

Community · Accepted Answer · 2020-06-20 09:12:55Z

3

First problem

Instead of using:

v_ports.push_back = "Com1"; v_ports.push_back = "Com4";

you should use:

v_ports.push_back("Com1"); v_ports.push_back("Com4");

because std::vector<T>::push_back is a function.

Second problem

The _T macro is supposed to be used on literals:

Use the _T macro to conditionally code literal strings to be portable to Unicode.

It cannot be used in expressions like _T(v_ports[i]).

To convert a string to unicode please see:

Converting unicode strings and vice-versa (Philipp's answer)
How well is Unicode supported in C++11?

edited Jun 20, 2020 at 9:12

CommunityBot

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answered May 30, 2014 at 10:06

sh03

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4 Comments

sh03 Over a year ago

Reason for the downvote? I'd love to improve my answer if there's something wrong with it.

VZ. Over a year ago

std::string can be converted to wxString (doing the Unicode conversion in the process implicitly) directly, i.e. just writing wxString(v_ports[i]) is enough if the string is ASCII (or encoded in the current locale encoding). Otherwise wxString::FromUTF8() could be useful.

Casisto Over a year ago

Hi, and thanks, but how I write to Deqing, the error is still there, even when i use push_back as function. (I had forgot to update it here, I had must to tired this morning when i used push_back like above...) But the second problem is fixed now, thx.

sh03 Over a year ago

@Casisto Please don't update your question with the solution. Leave it as it is. The solution stays in the answers.

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