How to change aui tab color ?

[AndrzejB]

Aui has attached component wxAuiTabArt which draws.
How to change background or font color of title?

[ONEEYEMAN]

Hi,
Create wxAuiArtProvider-derived class and do what you want there?

Thank you.

[AndrzejB]

Color should be not constants. For example: all tabs would have usual colors except tabs with modified files.

[ONEEYEMAN]

Hi,
Like I said - create a new TabArt class and do whatever you want there.

Thank you.

[AndrzejB]

I have problem with virtual methods of tabArt.
I rewrite MyBaseTabArt = whole wxAuiGenericTabArt, except :
in DrawTab:

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wxColor font_color = GetFontColour(page.active, back_color);

where

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virtual wxColour GetFontColour(bool pageActive, const wxColour& back_color);

wxColour MyBaseTabArt::GetFontColour(bool pageActive, const wxColour& back_color) {
    wxColor sys_color = wxSystemSettings::GetColour(
            pageActive ? wxSYS_COLOUR_CAPTIONTEXT : wxSYS_COLOUR_INACTIVECAPTIONTEXT);
    wxColor font_color = wxAuiHasSufficientContrast(back_color, sys_color) ? sys_color
            : wxAuiGetBetterContrastColour(back_color, *wxWHITE, *wxBLACK);
    return font_color;
}

and

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class MyTabArt: public MyBaseTabArt {
public:
    virtual wxColour GetFontColour(bool pageActive, const wxColour& back_color) wxOVERRIDE;
};

wxColour MyTabArt::GetFontColour(bool pageActive, const wxColour& back_color) {
    return wxColour(255,50,50);
}

I use:

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    wxAuiTabArt *art = new MyTabArt;
    auiNotebook->SetArtProvider(art);

But GetFontColour was called as non-virtual, disassembly show that is jump to constant address.

[doublemax]

There is no method called GetFontColour() in wxAuiTabArt.

[AndrzejB]

This method is in my art class: MyBaseTabArt

[doublemax]

This method is in my art class: MyBaseTabArt

How is that supposed to work? AUIs internal drawing routines only know about and use the methods from wxAuiTabArt. By subclassing wxAuiTabArt and overwriting one or more of its virtual methods, you can change what is drawn. Adding a new, unknown method will not change anything. How is the present code about to know that it needs to call your method to get the font color?

Anyway, after looking into the implementation of wxAuiGenericTabArt::DrawTab, i don't think it's possible to change the font color easily.

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    wxColor sys_color = wxSystemSettings::GetColour(
        page.active ? wxSYS_COLOUR_CAPTIONTEXT : wxSYS_COLOUR_INACTIVECAPTIONTEXT);
    wxColor font_color = wxAuiHasSufficientContrast(back_color, sys_color) ? sys_color
        : wxAuiGetBetterContrastColour(back_color, *wxWHITE, *wxBLACK);
    dc.SetTextForeground(font_color);
    dc.DrawText(draw_text,
                text_offset,
                drawn_tab_yoff + (drawn_tab_height)/2 - (texty/2) - 1);

The text color is more or less hard coded through the system colors.

Your only option would be to re-implement the whole method. (You could of course copy the whole code into MyBaseTabArt and just make changes to the font color in the above code part).

[AndrzejB]

I copy whole wxAuiGenericTabArt to my class and change my class.
Was problem with polymorphic.
Problem is solved:
was

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wxAuiTabArt* MyBaseTabArt::Clone() {
    return new MyBaseTabArt(*this);
}

Must be added necessary Clone in subclass!

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wxAuiTabArt *MyTabArt::Clone() {
    return new MyTabArt(*this);
}

Notabene: for good clone handling is needed metaclasses.