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c++unicodeasciiwxwidgets

Unicode in wxWidgets

I'm creating a calculator application in C++ wxWidgets using Visual Studio 2019. I have created a custom button class that I want to use for all mathematical operations and symbols.

My custom button class

How can I set the button's label to √ instead of sqrt? If I do that, a ? symbol is displayed instead. I also need to display these symbols on a wxTextCtrl, if I do it I get the following error when I try to compile: (ignore App.razor, the picture is not mine)

Error

Do I need to change che current character set from ASCII to Unicode? How do you do that?

Solution

  • For a single character, you can just use wxUniChar. You create a wxUniChar with a value in hexadecimal of the Unicode code point for the desired character. Since the Unicode code point of the square root character is U+221A, you can create a wxUniChar for this character like so:

    wxUniChar c(0x221A);

    wxUnichar is implicitly convertible to wxString, so (assuming wxWidgets was built in Unicode mode), you can use wxUniChar variables exactly as you would use a wxString. For example you could do something like:

    control->SetLabel(c);

    or

    dc.DrawText(c,0,0);