| gtkmm
    3.24.2
    | 
This interface can be implemented by widgets which allow the user to choose a color. More...
#include <gtkmm/colorchooser.h>

| Public Member Functions | |
| ColorChooser (ColorChooser&& src) noexcept | |
| ColorChooser& | operator= (ColorChooser&& src) noexcept | 
| ~ColorChooser () noexcept override | |
| GtkColorChooser* | gobj () | 
| Provides access to the underlying C GObject.  More... | |
| const GtkColorChooser* | gobj () const | 
| Provides access to the underlying C GObject.  More... | |
| Gdk::RGBA | get_rgba () const | 
| Gets the currently selected color.  More... | |
| void | set_rgba (const Gdk::RGBA& color) | 
| Sets the color.  More... | |
| bool | get_use_alpha () const | 
| Returns whether the color chooser shows the alpha channel.  More... | |
| void | set_use_alpha (bool use_alpha=true) | 
| Sets whether or not the color chooser should use the alpha channel.  More... | |
| void | add_palette (Orientation orientation, int colors_per_line, const std::vector< Gdk::RGBA >& colors) | 
| Adds a palette to the color chooser.  More... | |
| Glib::SignalProxy< void, const Gdk::RGBA& > | signal_color_activated () | 
| Glib::PropertyProxy< Gdk::RGBA > | property_rgba () | 
| The property_rgba() property contains the currently selected color, as a Gdk::RGBA struct.  More... | |
| Glib::PropertyProxy_ReadOnly< Gdk::RGBA > | property_rgba () const | 
| The property_rgba() property contains the currently selected color, as a Gdk::RGBA struct.  More... | |
| Glib::PropertyProxy< bool > | property_use_alpha () | 
| When signal_use_alpha() is true, colors may have alpha (translucency) information.  More... | |
| Glib::PropertyProxy_ReadOnly< bool > | property_use_alpha () const | 
| When signal_use_alpha() is true, colors may have alpha (translucency) information.  More... | |
|  Public Member Functions inherited from Glib::Interface | |
| Interface () | |
| Interface (Interface &&src) noexcept | |
| Interface & | operator= (Interface &&src) noexcept | 
| Interface (const Glib::Interface_Class &interface_class) | |
| Interface (GObject *castitem) | |
| ~Interface () noexcept override | |
| Interface (const Interface &)=delete | |
| Interface & | operator= (const Interface &)=delete | 
| GObject * | gobj () | 
| const GObject * | gobj () const | 
|  Public Member Functions inherited from Glib::ObjectBase | |
| ObjectBase (const ObjectBase &)=delete | |
| ObjectBase & | operator= (const ObjectBase &)=delete | 
| void | set_property_value (const Glib::ustring &property_name, const Glib::ValueBase &value) | 
| void | get_property_value (const Glib::ustring &property_name, Glib::ValueBase &value) const | 
| void | set_property (const Glib::ustring &property_name, const PropertyType &value) | 
| void | get_property (const Glib::ustring &property_name, PropertyType &value) const | 
| void | connect_property_changed (const Glib::ustring &property_name, const sigc::slot< void > &slot) | 
| void | connect_property_changed (const Glib::ustring &property_name, sigc::slot< void > &&slot) | 
| sigc::connection | connect_property_changed_with_return (const Glib::ustring &property_name, const sigc::slot< void > &slot) | 
| sigc::connection | connect_property_changed_with_return (const Glib::ustring &property_name, sigc::slot< void > &&slot) | 
| void | freeze_notify () | 
| void | thaw_notify () | 
| virtual void | reference () const | 
| virtual void | unreference () const | 
| GObject * | gobj () | 
| const GObject * | gobj () const | 
| GObject * | gobj_copy () const | 
|  Public Member Functions inherited from sigc::trackable | |
| trackable () noexcept | |
| trackable (const trackable &src) noexcept | |
| trackable (trackable &&src) | |
| ~trackable () | |
| void | add_destroy_notify_callback (void *data, func_destroy_notify func) const | 
| void | notify_callbacks () | 
| trackable & | operator= (const trackable &src) | 
| trackable & | operator= (trackable &&src) | 
| void | remove_destroy_notify_callback (void *data) const | 
| Static Public Member Functions | |
| static void | add_interface (GType gtype_implementer) | 
| static GType | get_type () | 
| Get the GType for this class, for use with the underlying GObject type system.  More... | |
| Protected Member Functions | |
| ColorChooser () | |
| You should derive from this class to use it.  More... | |
| virtual void | on_color_activated (const Gdk::RGBA& color) | 
| This is a default handler for the signal signal_color_activated().  More... | |
|  Protected Member Functions inherited from Glib::ObjectBase | |
| ObjectBase () | |
| ObjectBase (const char *custom_type_name) | |
| ObjectBase (const std::type_info &custom_type_info) | |
| ObjectBase (ObjectBase &&src) noexcept | |
| ObjectBase & | operator= (ObjectBase &&src) noexcept | 
| virtual | ~ObjectBase () noexcept=0 | 
| void | initialize (GObject *castitem) | 
| void | initialize_move (GObject *castitem, Glib::ObjectBase *previous_wrapper) | 
| Related Functions | |
| (Note that these are not member functions.) | |
| Glib::RefPtr< Gtk::ColorChooser > | wrap (GtkColorChooser* object, bool take_copy=false) | 
| A Glib::wrap() method for this object.  More... | |
| Additional Inherited Members | |
|  Public Types inherited from sigc::trackable | |
| typedef internal::func_destroy_notify | func_destroy_notify | 
This interface can be implemented by widgets which allow the user to choose a color.
Depending on the situation, colors may be allowed to have alpha (translucency). The main widgets that implement this interface are ColorChooserWidget, ColorChooserDialog and ColorChooserButton.
| 
 | protected | 
You should derive from this class to use it.
| 
 | noexcept | 
| 
 | overridenoexcept | 
| 
 | static | 
| void Gtk::ColorChooser::add_palette | ( | Orientation | orientation, | 
| int | colors_per_line, | ||
| const std::vector< Gdk::RGBA >& | colors | ||
| ) | 
Adds a palette to the color chooser.
If orientation is horizontal, the colors are grouped in rows, with colors_per_line colors in each row. If orientation is vertical, the colors are grouped in columns instead.
The default color palette of ColorChooserWidget has 27 colors, organized in columns of 3 colors. The default gray palette has 9 grays in a single row.
The layout of the color chooser widget works best when the palettes have 9-10 columns.
Calling this function for the first time has the side effect of removing the default color and gray palettes from the color chooser.
| orientation | ORIENTATION_HORIZONTAL if the palette should be displayed in rows, or ORIENTATION_VERTICAL for columns | 
| colors_per_line | The number of colors to show in each row/column. | 
| colors | The colors of the palette. | 
| Gdk::RGBA Gtk::ColorChooser::get_rgba | ( | ) | const | 
| 
 | static | 
Get the GType for this class, for use with the underlying GObject type system.
| bool Gtk::ColorChooser::get_use_alpha | ( | ) | const | 
Returns whether the color chooser shows the alpha channel.
true if the color chooser uses the alpha channel, false if not. | 
 | inline | 
Provides access to the underlying C GObject.
| 
 | inline | 
Provides access to the underlying C GObject.
| 
 | protectedvirtual | 
This is a default handler for the signal signal_color_activated().
| 
 | noexcept | 
| Glib::PropertyProxy< Gdk::RGBA > Gtk::ColorChooser::property_rgba | ( | ) | 
The property_rgba() property contains the currently selected color, as a Gdk::RGBA struct.
The property can be set to change the current selection programmatically.
| Glib::PropertyProxy_ReadOnly< Gdk::RGBA > Gtk::ColorChooser::property_rgba | ( | ) | const | 
The property_rgba() property contains the currently selected color, as a Gdk::RGBA struct.
The property can be set to change the current selection programmatically.
| Glib::PropertyProxy< bool > Gtk::ColorChooser::property_use_alpha | ( | ) | 
When signal_use_alpha() is true, colors may have alpha (translucency) information. 
When it is false, the Gdk::RGBA struct obtained via the Gtk::ColorChooser::property_rgba() property will be forced to have alpha == 1.
Implementations are expected to show alpha by rendering the color over a non-uniform background (like a checkerboard pattern).
Default value: true
| Glib::PropertyProxy_ReadOnly< bool > Gtk::ColorChooser::property_use_alpha | ( | ) | const | 
When signal_use_alpha() is true, colors may have alpha (translucency) information. 
When it is false, the Gdk::RGBA struct obtained via the Gtk::ColorChooser::property_rgba() property will be forced to have alpha == 1.
Implementations are expected to show alpha by rendering the color over a non-uniform background (like a checkerboard pattern).
Default value: true
| void Gtk::ColorChooser::set_rgba | ( | const Gdk::RGBA& | color | ) | 
| void Gtk::ColorChooser::set_use_alpha | ( | bool | use_alpha = true | ) | 
Sets whether or not the color chooser should use the alpha channel.
| use_alpha | trueif color chooser should use alpha channel,falseif not. | 
| Glib::SignalProxy< void,const Gdk::RGBA& > Gtk::ColorChooser::signal_color_activated | ( | ) | 
void on_my_color_activated(const Gdk::RGBA& color)Flags: Run First
Emitted when a color is activated from the color chooser. This usually happens when the user clicks a color swatch, or a color is selected and the user presses one of the keys Space, Shift+Space, Return or Enter.
| color | The color. | 
| 
 | related | 
A Glib::wrap() method for this object.
| object | The C instance. | 
| take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref. | 
 1.8.18
 1.8.18