## GtkColorSelection

GtkColorSelection — A widget used to select a color

## Functions

GtkWidget * | gtk_color_selection_new ()
void | gtk_color_selection_set_update_policy ()
void | gtk_color_selection_set_has_opacity_control ()
gboolean | gtk_color_selection_get_has_opacity_control ()
void | gtk_color_selection_set_has_palette ()
gboolean | gtk_color_selection_get_has_palette ()
guint16 | gtk_color_selection_get_current_alpha ()
void | gtk_color_selection_set_current_alpha ()
void | gtk_color_selection_get_current_color ()
void | gtk_color_selection_set_current_color ()
guint16 | gtk_color_selection_get_previous_alpha ()
void | gtk_color_selection_set_previous_alpha ()
void | gtk_color_selection_get_previous_color ()
void | gtk_color_selection_set_previous_color ()
gboolean | gtk_color_selection_is_adjusting ()
gboolean | gtk_color_selection_palette_from_string ()
gchar * | gtk_color_selection_palette_to_string ()
GtkColorSelectionChangePaletteFunc | gtk_color_selection_set_change_palette_hook ()
void | (*GtkColorSelectionChangePaletteFunc) ()
GtkColorSelectionChangePaletteWithScreenFunc | gtk_color_selection_set_change_palette_with_screen_hook ()
void | (*GtkColorSelectionChangePaletteWithScreenFunc) ()
void | gtk_color_selection_set_color ()
void | gtk_color_selection_get_color ()

## Properties

guint | current-alpha | Read / Write
GdkColor * | current-color | Read / Write
gboolean | has-opacity-control | Read / Write
gboolean | has-palette | Read / Write

## Signals

void | color-changed | Run First

## Types and Values

struct | GtkColorSelection

## Object Hierarchy

        GObject
        ╰── GInitiallyUnowned
            ╰── GtkObject
                ╰── GtkWidget
                    ╰── GtkContainer
                        ╰── GtkBox
                            ╰── GtkVBox
                                ╰── GtkColorSelection

## Implemented Interfaces

GtkColorSelection implements AtkImplementorIface, GtkBuildable and GtkOrientable.

## Includes

    #include <gtk/gtk.h>

## Description

The GtkColorSelection is a widget that is used to select a color. It consists of a color wheel and number of sliders and entry boxes for color parameters such as hue, saturation, value, red, green, blue, and opacity. It is found on the standard color selection dialog box GtkColorSelectionDialog.

## Functions

### gtk_color_selection_new ()

    GtkWidget *
    gtk_color_selection_new (void);

Creates a new GtkColorSelection.

#### Returns

a new GtkColorSelection

### gtk_color_selection_set_update_policy ()

    void
    gtk_color_selection_set_update_policy (GtkColorSelection *colorsel,
                                           GtkUpdateType policy);

`gtk_color_selection_set_update_policy` is deprecated and should not be used in newly-written code.

Sets the policy controlling when the color_changed signals are emitted. The available policies are:

- `GTK_UPDATE_CONTINUOUS` - signals are sent continuously as the color selection changes.

- `GTK_UPDATE_DISCONTINUOUS` - signals are sent only when the mouse button is released.

- `GTK_UPDATE_DELAYED` - signals are sent when the mouse button is released or when the mouse has been motionless for a period of time.

#### Parameters

colorsel | a GtkColorSelection. |
policy | a GtkUpdateType value indicating the desired policy. |

### gtk_color_selection_set_has_opacity_control ()

    void
    gtk_color_selection_set_has_opacity_control
                                   (GtkColorSelection *colorsel,
                                    gboolean has_opacity);

Sets the `colorsel` to use or not use opacity.

#### Parameters

colorsel | a GtkColorSelection. |
has_opacity | `TRUE` if `colorsel` can set the opacity, `FALSE` otherwise. |

### gtk_color_selection_get_has_opacity_control ()

    gboolean
    gtk_color_selection_get_has_opacity_control
                                   (GtkColorSelection *colorsel);

Determines whether the colorsel has an opacity control.

#### Parameters

colorsel | a GtkColorSelection. |

#### Returns

`TRUE` if the `colorsel` has an opacity control. `FALSE` if it does't.

### gtk_color_selection_set_has_palette ()

    void
    gtk_color_selection_set_has_palette (GtkColorSelection *colorsel,
                                         gboolean has_palette);

Shows and hides the palette based upon the value of `has_palette` .

#### Parameters

colorsel | a GtkColorSelection. |
has_palette | `TRUE` if palette is to be visible, `FALSE` otherwise. |

### gtk_color_selection_get_has_palette ()

    gboolean
    gtk_color_selection_get_has_palette (GtkColorSelection *colorsel);

Determines whether the color selector has a color palette.

#### Parameters

colorsel | a GtkColorSelection. |

#### Returns

`TRUE` if the selector has a palette. `FALSE` if it hasn't.

### gtk_color_selection_get_current_alpha ()

    guint16
    gtk_color_selection_get_current_alpha (GtkColorSelection *colorsel);

Returns the current alpha value.

#### Parameters

colorsel | a GtkColorSelection. |

#### Returns

an integer between 0 and 65535.

### gtk_color_selection_set_current_alpha ()

    void
    gtk_color_selection_set_current_alpha (GtkColorSelection *colorsel,
                                           guint16 alpha);

Sets the current opacity to be `alpha` . The first time this is called, it will also set the original opacity to be `alpha` too.

#### Parameters

colorsel | a GtkColorSelection. |
alpha | an integer between 0 and 65535. |

### gtk_color_selection_get_current_color ()

    void
    gtk_color_selection_get_current_color (GtkColorSelection *colorsel,
                                           GdkColor *color);

Sets `color` to be the current color in the GtkColorSelection widget.

#### Parameters

colorsel | a GtkColorSelection. |
color | a GdkColor to fill in with the current color. | [out]

### gtk_color_selection_set_current_color ()

    void
    gtk_color_selection_set_current_color (GtkColorSelection *colorsel,
                                           const GdkColor *color);

Sets the current color to be `color` . The first time this is called, it will also set the original color to be `color` too.

#### Parameters

colorsel | a GtkColorSelection. |
color | A GdkColor to set the current color with. |

### gtk_color_selection_get_previous_alpha ()

    guint16
    gtk_color_selection_get_previous_alpha
                                   (GtkColorSelection *colorsel);

Returns the previous alpha value.

#### Parameters

colorsel | a GtkColorSelection. |

#### Returns

an integer between 0 and 65535.

### gtk_color_selection_set_previous_alpha ()

    void
    gtk_color_selection_set_previous_alpha
                                   (GtkColorSelection *colorsel,
                                    guint16 alpha);

Sets the 'previous' alpha to be `alpha` . This function should be called with some hesitations, as it might seem confusing to have that alpha change.

#### Parameters

colorsel | a GtkColorSelection. |
alpha | an integer between 0 and 65535. |

### gtk_color_selection_get_previous_color ()

    void
    gtk_color_selection_get_previous_color
                                   (GtkColorSelection *colorsel,
                                    GdkColor *color);

Fills `color` in with the original color value.

#### Parameters

colorsel | a GtkColorSelection. |
color | a GdkColor to fill in with the original color value. | [out]

### gtk_color_selection_set_previous_color ()

    void
    gtk_color_selection_set_previous_color
                                   (GtkColorSelection *colorsel,
                                    const GdkColor *color);

Sets the 'previous' color to be `color` . This function should be called with some hesitations, as it might seem confusing to have that color change. Calling `gtk_color_selection_set_current_color()` will also set this color the first time it is called.

#### Parameters

colorsel | a GtkColorSelection. |
color | a GdkColor to set the previous color with. |

### gtk_color_selection_is_adjusting ()

    gboolean
    gtk_color_selection_is_adjusting (GtkColorSelection *colorsel);

Gets the current state of the `colorsel` .

#### Parameters

colorsel | a GtkColorSelection. |

#### Returns

`TRUE` if the user is currently dragging a color around, and `FALSE` if the selection has stopped.

### gtk_color_selection_palette_from_string ()

    gboolean
    gtk_color_selection_palette_from_string
                                   (const gchar *str,
                                    GdkColor **colors,
                                    gint *n_colors);

Parses a color palette string; the string is a colon-separated list of color names readable by `gdk_color_parse()`.

#### Parameters

str | a string encoding a color palette. |
colors | return location for allocated array of GdkColor. | [out][array length=n_colors]
n_colors | return location for length of array. |

#### Returns

`TRUE` if a palette was successfully parsed.

### gtk_color_selection_palette_to_string ()

    gchar *
    gtk_color_selection_palette_to_string (const GdkColor *colors,
                                           gint n_colors);

Encodes a palette as a string, useful for persistent storage.

#### Parameters

colors | an array of colors. | [array length=n_colors]
n_colors | length of the array. |

#### Returns

allocated string encoding the palette.

### gtk_color_selection_set_change_palette_hook ()

    GtkColorSelectionChangePaletteFunc
    gtk_color_selection_set_change_palette_hook
                                   (GtkColorSelectionChangePaletteFunc func);

`gtk_color_selection_set_change_palette_hook` has been deprecated since version 2.4 and should not be used in newly-written code.

This function does not work in multihead environments. Use `gtk_color_selection_set_change_palette_with_screen_hook()` instead.

Installs a global function to be called whenever the user tries to modify the palette in a color selection. This function should save the new palette contents, and update the GtkSettings property "gtk-color-palette" so all GtkColorSelection widgets will be modified.

#### Parameters

func | a function to call when the custom palette needs saving. |

#### Returns

the previous change palette hook (that was replaced).

### GtkColorSelectionChangePaletteFunc ()

    void
    (*GtkColorSelectionChangePaletteFunc) (const GdkColor *colors,
                                           gint n_colors);

### gtk_color_selection_set_change_palette_with_screen_hook ()

    GtkColorSelectionChangePaletteWithScreenFunc
    gtk_color_selection_set_change_palette_with_screen_hook
                                   (GtkColorSelectionChangePaletteWithScreenFunc func);

Installs a global function to be called whenever the user tries to modify the palette in a color selection. This function should save the new palette contents, and update the GtkSettings property "gtk-color-palette" so all GtkColorSelection widgets will be modified.

#### Parameters

func | a function to call when the custom palette needs saving. |

#### Returns

the previous change palette hook (that was replaced).

Since 2.2

### GtkColorSelectionChangePaletteWithScreenFunc ()

    void
    (*GtkColorSelectionChangePaletteWithScreenFunc)
                                   (GdkScreen *screen,
                                    const GdkColor *colors,
                                    gint n_colors);

Since 2.2

### gtk_color_selection_set_color ()

    void
    gtk_color_selection_set_color (GtkColorSelection *colorsel,
                                   gdouble *color);

`gtk_color_selection_set_color` has been deprecated since version 2.0 and should not be used in newly-written code.

Use `gtk_color_selection_set_current_color()` instead.

Sets the current color to be `color` . The first time this is called, it will also set the original color to be `color` too.

#### Parameters

colorsel | a GtkColorSelection. |
color | an array of 4 doubles specifying the red, green, blue and opacity to set the current color to. |

### gtk_color_selection_get_color ()

    void
    gtk_color_selection_get_color (GtkColorSelection *colorsel,
                                   gdouble *color);

`gtk_color_selection_get_color` has been deprecated since version 2.0 and should not be used in newly-written code.

Use `gtk_color_selection_get_current_color()` instead.

Sets `color` to be the current color in the GtkColorSelection widget.

#### Parameters

colorsel | a GtkColorSelection. |
color | an array of 4 gdouble to fill in with the current color. |

## Types and Values

### struct GtkColorSelection

    struct GtkColorSelection;

The GtkColorSelection struct contains private data only, and should be accessed using the functions below.

## Property Details

### The `“current-alpha”` property

      “current-alpha”            guint

The current opacity value (0 fully transparent, 65535 fully opaque).

Flags: Read / Write

Allowed values: <= 65535

Default value: 65535

### The `“current-color”` property

      “current-color”            GdkColor *

The current color.

Flags: Read / Write

### The `“has-opacity-control”` property

      “has-opacity-control”      gboolean

Whether the color selector should allow setting opacity.

Flags: Read / Write

Default value: FALSE

### The `“has-palette”` property

      “has-palette”              gboolean

Whether a palette should be used.

Flags: Read / Write

Default value: FALSE

## Signal Details

### The `“color-changed”` signal

    void
    user_function (GtkColorSelection *colorselection,
                   gpointer           user_data)

This signal is emitted when the color changes in the GtkColorSelection according to its update policy.

#### Parameters

colorselection | the object which received the signal. |
user_data | user data set when the signal handler was connected. |

Flags: Run First