每个项目的自定义背景色？

Question

I have a Fl_Choice with few options, for example:

Fl_Choice* o = new Fl_Choice(70, 100, 240, 25, "Some Options:");
o->add("Blue");
o->add("Black");
o->add("Orange");
o->add("Purple");

I did like to set a custom color for the background of each item while leaving the foreground color to white.

How do I set a custom background per item?

NOTE: I am using v90, not sure what tag I should use for that one or if vs2008 is sufficient, kindly remove this note if its sufficient as is or drop me a comment with what other tag I should add.

Answer 1

Not so easy to set the background colour but you can set the foreground colour

Fl_Menu_Item choices[] =
{
    //                                               ,-- The colour
    {"red",0,(Fl_Callback*)0, (void*) 0, 0, 0, 0, 0, 0xFF000000},
    {"blue",0,(Fl_Callback*)0, (void*) 0, 0, 0, 0, 0, 0x0000FF00},
    {"green",0,(Fl_Callback*)0, (void*) 0, 0, 0, 0, 0, 0x00FF0000},
    {"yellow",0,(Fl_Callback*)0, (void*) 0, 0, 0, 0, 0, 0xFFFF0000},
    {0}
};

...

Fl_Choice *c = new Fl_Choice(50,250,200,25);
c->menu(choices);

Alternatively, you can derive from Fl_Choice if you don't want so many zeros

class ColourChoice: public Fl_Choice
{
public:
   ColourChoice(int x, int y, int w, int h, const char* l = 0)
      : Fl_Choice(x, y, w, h, l)
   {
   }

   void add(const char* text, Fl_Color color)
   {
       Fl_Choice::add(text);
       Fl_Menu_Item* item = const_cast<Fl_Menu_Item*>(find_item(text));
       item->labelcolor(color);
   }
};

...
ColourChoice* c = new ColourChoice(...);
c->add("purple", (Fl_Color)0xFF00FF00);