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Widgets     Book   Gdk::Colormap Class Reference Inheritance diagram for Gdk::Colormap: [legend]List of all members. Public Methods virtual  ~Colormap () GdkColormap*  gobj () const GdkColormap*  gobj () const GdkColormap*  gobj_copy () int  alloc_colors (GdkColor* colors, int ncolors, bool writeable, bool best_match, gboolean* success)   Allocates colors from a colormap. bool  alloc_color (Color& color, bool writeable=false, bool best_match=true)   Allocates a single color from a colormap. void  free_colors (GdkColor* colors, int ncolors)   Frees previously allocated colors. void  query_color (gulong pixel, Color& result)   Locates the RGB color in colormap corresponding to the given hardware pixel pixel . Glib::RefPtr<Visual>  get_visual ()   Returns the visual for which a given colormap was created. Glib::RefPtr<const Visual>  get_visual () const   Returns the visual for which a given colormap was created. Glib::RefPtr<Screen>  get_screen ()   Gets the screen for which this colormap was created. Glib::RefPtr<const Screen>  get_screen () const   Gets the screen for which this colormap was created. Static Public Methods Glib::RefPtr<Colormap>  create (const Glib::RefPtr<Visual>& visual, bool allocate) Protected Methods   Colormap (const Glib::RefPtr<Visual>& visual, bool allocate) Related Functions (Note that these are not member functions.) Glib::RefPtr<Gdk::Colormap>  wrap (GdkColormap* object, bool take_copy=false) Constructor & Destructor Documentation virtual Gdk::Colormap::~Colormap (   )  [virtual] Gdk::Colormap::Colormap ( const Glib::RefPtr<Visual>&    visual, bool    allocate )  [explicit, protected] Member Function Documentation bool Gdk::Colormap::alloc_color ( Color&    color, bool    writeable = false, bool    best_match = true )    Allocates a single color from a colormap. Parameters: color  The color to allocate. On return the <structfield>pixel</structfield> field will be filled in if allocation succeeds. writeable  If true, the color is allocated writeable (their values can later be changed using gdk_color_change()). Writeable colors cannot be shared between applications. best_match  If true, GDK will attempt to do matching against existing colors if the color cannot be allocated as requested. Returns: true if the allocation succeeded. int Gdk::Colormap::alloc_colors ( GdkColor*    colors, int    ncolors, bool    writeable, bool    best_match, gboolean*    success )    Allocates colors from a colormap. Parameters: colors  The color values to allocate. On return, the pixel values for allocated colors will be filled in. ncolors  The number of colors in colors . writeable  If true, the colors are allocated writeable (their values can later be changed using gdk_color_change()). Writeable colors cannot be shared between applications. best_match  If true, GDK will attempt to do matching against existing colors if the colors cannot be allocated as requested. success  An array of length ncolors . On return, this indicates whether the corresponding color in colors was sucessfully allocated or not. Returns: The number of colors that were not sucessfully allocated. Glib::RefPtr<Colormap> Gdk::Colormap::create ( const Glib::RefPtr<Visual>&    visual, bool    allocate )  [static] void Gdk::Colormap::free_colors ( GdkColor*    colors, int    ncolors )    Frees previously allocated colors. Parameters: colors  The colors to free. ncolors  The number of colors in colors . Glib::RefPtr<const Screen> Gdk::Colormap::get_screen (   )  const   Gets the screen for which this colormap was created. Returns: The screen for which this colormap was created. Since: 2.2. Glib::RefPtr<Screen> Gdk::Colormap::get_screen (   )    Gets the screen for which this colormap was created. Returns: The screen for which this colormap was created. Since: 2.2. Glib::RefPtr<const Visual> Gdk::Colormap::get_visual (   )  const   Returns the visual for which a given colormap was created. Returns: The visual of the colormap. Glib::RefPtr<Visual> Gdk::Colormap::get_visual (   )    Returns the visual for which a given colormap was created. Returns: The visual of the colormap. const GdkColormap* Gdk::Colormap::gobj (   )  const [inline]   Reimplemented from Glib::ObjectBase. GdkColormap* Gdk::Colormap::gobj (   )  [inline]   Reimplemented from Glib::ObjectBase. GdkColormap* Gdk::Colormap::gobj_copy (   )  void Gdk::Colormap::query_color ( gulong    pixel, Color&    result )    Locates the RGB color in colormap corresponding to the given hardware pixel pixel . pixel must be a valid pixel in the colormap; it's a programmer error to call this function with a pixel which is not in the colormap. Hardware pixels are normally obtained from alloc_colors(), or from a Gdk::Image. (A Gdk::Image contains image data in hardware format, a Gdk::Pixbuf contains image data in a canonical 24-bit RGB format.) This function is rarely useful; it's used for example to implement the eyedropper feature in Gtk::ColorSelection. Parameters: pixel  Pixel value in hardware display format. result  Gdk::Color with red, green, blue fields initialized. Friends And Related Function Documentation Glib::RefPtr<Gdk::Colormap> wrap ( GdkColormap*    object, bool    take_copy = false )  [related] The documentation for this class was generated from the following file: colormap.h