Method draw_toggle_button

dlib/gui_widgets/style.cpp:409–476

// ----------------------------------------------------------------------------------------

    void toggle_button_style_default::draw_toggle_button (
        const canvas& c,
        const rectangle& rect,
        const bool enabled,
        const font& mfont,
        const long ,
        const long ,
        const ustring& name,
        const bool is_depressed,
        const bool is_checked
    ) const
    {
        rectangle area = rect.intersect(c);
        if (area.is_empty())
            return;

        fill_rect(c,rect,rgb_pixel(212,208,200));

        unsigned char red, green, blue;
        if (enabled)
        {
            red = 0;
            green = 0;
            blue = 0;
        }
        else
        {
            red = 128;
            green = 128;
            blue = 128;
        }

        // compute the name length if it hasn't already been computed
        if (name_width == 0)
        {
            unsigned long height;
            mfont.compute_size(name,name_width,height);
        }

        // figure out where the name string should appear
        rectangle name_rect;
        const unsigned long width = name_width;
        const unsigned long height = mfont.height();
        name_rect.set_left((rect.right() + rect.left() - width)/2);
        name_rect.set_top((rect.bottom() + rect.top() - height)/2 + 1);
        name_rect.set_right(name_rect.left()+width-1);
        name_rect.set_bottom(name_rect.top()+height);

        long d = 0;
        if (is_checked)
            d = 1;

        if (is_depressed)
            d = 2;

        name_rect.set_left(name_rect.left()+d);
        name_rect.set_right(name_rect.right()+d);
        name_rect.set_top(name_rect.top()+d);