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| RGBA (GdkRGBA* gobject, bool make_a_copy=true) |
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| RGBA (const RGBA& other) |
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RGBA& | operator= (const RGBA& other) |
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| ~RGBA () |
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void | swap (RGBA& other) |
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GdkRGBA* | gobj () |
| Provides access to the underlying C instance. More...
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const GdkRGBA* | gobj () const |
| Provides access to the underlying C instance. More...
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GdkRGBA* | gobj_copy () const |
| Provides access to the underlying C instance. The caller is responsible for freeing it. Use when directly setting fields in structs. More...
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| RGBA () |
| Instantiate a new Gdk::RGBA. More...
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| RGBA (const Glib::ustring& value) |
| Instantiate a new Gdk::RGBA. More...
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void | set_grey_u (gushort value, gushort alpha=65535) |
| Set a grey color, by using the same value for all color components. More...
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void | set_grey (double g, double alpha=1.0) |
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void | set_rgba_u (gushort red_, gushort green_, gushort blue_, gushort alpha_=65535) |
| Set the color, by specifying red, green, and blue color component values. More...
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void | set_rgba (double red_, double green_, double blue_, double alpha_=1.0) |
| Set the color, by specifying red, green, and blue color component values, as percentages. More...
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void | set_hsv (double h, double s, double v) |
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void | set_hsl (double h, double s, double l) |
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bool | set (const Glib::ustring& spec) |
| Parses a textual representation of a color, filling in the red , green , blue and alpha fields of the rgba struct. More...
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gushort | get_red_u () const |
| Get the red component of the color. More...
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gushort | get_green_u () const |
| Get the green component of the color. More...
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gushort | get_blue_u () const |
| Get the blue component of the color. More...
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gushort | get_alpha_u () const |
| Get the alpha component of the color. More...
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void | set_red_u (gushort value) |
| Set the red component of the color. More...
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void | set_green_u (gushort value) |
| Set the green component of the color. More...
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void | set_blue_u (gushort value) |
| Set the blue component of the color. More...
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void | set_alpha_u (gushort value) |
| Set the alpha component of the color. More...
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double | get_red () const |
| Get the red component of the color, as a percentage. More...
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double | get_green () const |
| Get the green component of the color, as a percentage. More...
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double | get_blue () const |
| Get the blue component of the color, as a percentage. More...
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double | get_alpha () const |
| Get the alpha component of the color, as a percentage. More...
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void | set_red (double value) |
| Set the red component of the color, as a percentage. More...
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void | set_green (double value) |
| Set the green component of the color, as a percentage. More...
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void | set_blue (double value) |
| Set the blue component of the color, as a percentage. More...
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void | set_alpha (double value) |
| Set the alpha component of the color, as a percentage. More...
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Glib::ustring | to_string () const |
| Returns a textual specification of rgba in the form rgb (r, g, b) or rgba (r, g, b, a) , where 'r', 'g', 'b' and 'a' represent the red, green, blue and alpha values respectively. More...
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An RGBA Color.
The RGBA class is a convenient way to pass rgba colors around. It's based on cairo's way to deal with (possibly translucent) colors and mirrors its behavior. All values are in the range from 0.0 to 1.0 inclusive. So the color (0.0, 0.0, 0.0, 0.0) represents transparent black and (1.0, 1.0, 1.0, 1.0) is opaque white. Other values will be clamped to this range when drawing.
Parses a textual representation of a color, filling in the red
, green
, blue
and alpha
fields of the rgba struct.
The string can be either one of:
- A standard name (Taken from the X11 rgb.txt file).
- A hex value in the form '#rgb' '#rrggbb' '#rrrgggbbb' or '#rrrrggggbbbb'
- A RGB color in the form 'rgb(r,g,b)' (In this case the color will have full opacity)
- A RGBA color in the form 'rgba(r,g,b,a)'
Where 'r', 'g', 'b' and 'a' are respectively the red, green, blue and alpha color values. In the last two cases, r g and b are either integers in the range 0 to 255 or precentage values in the range 0% to 100%, and a is a floating point value in the range 0 to 1.
- Since gtkmm 3.0:
- Parameters
-
spec | The string specifying the color. |
- Returns
true
if the parsing succeeded.
Returns a textual specification of rgba in the form rgb (r, g, b)
or rgba (r, g, b, a)
, where 'r', 'g', 'b' and 'a' represent the red, green, blue and alpha values respectively.
r, g, and b are represented as integers in the range 0 to 255, and a is represented as floating point value in the range 0 to 1.
These string forms are string forms those supported by the CSS3 colors module, and can be parsed by gdk_rgba_parse().
Note that this string representation may loose some precision, since r, g and b are represented as 8-bit integers. If this is a concern, you should use a different representation.
- Since gtkmm 3.0:
- Returns
- A newly allocated text string.