## Documentation

Table of Contents
Class Inheritance Tree
Widget Screenshots
Package groups

## Index

Package: Curve

- Goto spec source

# Description

    package Gtk.Curve is

The Gtk_Curve widget allows the user to edit a curve covering a range of values. It is typically used to fine-tune color balances in graphics applications like the Gimp.

The Gtk_Curve widget has 3 modes of operation: spline, linear and free. In spline mode the user places points on the curve which are automatically connected together into a smooth curve. In linear mode the user places points on the curve which are connected by straight lines. In free mode the user can draw the points of the curve freely, and they are not connected at all.

# Packages

### Implements_Buildable (new Glib.Types.Implements)

    package Implements_Buildable is new Glib.Types.Implements
         (Gtk.Buildable.Gtk_Buildable, Gtk_Curve_Record, Gtk_Curve);

# Classes

### Gtk_Curve_Record

- Goto declaration in source

    type Gtk_Curve_Record is new Gtk_Drawing_Area_Record with null record;

#### Ancestors:

Gtk.Drawing_Area.Gtk_Drawing_Area_Record
Gtk.Widget.Gtk_Widget_Record
Glib.Object.GObject_Record

#### Primitive operations:

Get_Vector

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Glib.Object.Deallocate

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(Inherited)
Glib.Object.Get_Type

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(Inherited)
Glib.Object.Notify

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(Inherited)
Glib.Object.Ref

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(Inherited)
Glib.Object.Ref_Sink

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(Inherited)
Glib.Object.Unref

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(Inherited)
Gtk.Drawing_Area.Size

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(Inherited)
Gtk.Widget.Activate

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(Inherited)
Gtk.Widget.Add_Accelerator

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(Inherited)
Gtk.Widget.Add_Events

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(Inherited)
Gtk.Widget.Add_Mnemonic_Label

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(Inherited)
Gtk.Widget.Can_Activate_Accel

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(Inherited)
Gtk.Widget.Child_Notify

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(Inherited)
Gtk.Widget.Class_Path

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(Inherited)
Gtk.Widget.Class_Path_Reversed

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(Inherited)
Gtk.Widget.Create_Pango_Context

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(Inherited)
Gtk.Widget.Create_Pango_Layout

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(Inherited)
Gtk.Widget.Destroy

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(Inherited)
Gtk.Widget.Draw

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(Inherited)
Gtk.Widget.Ensure_Style

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(Inherited)
Gtk.Widget.Error_Bell

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Gtk.Widget.Flag_Is_Set

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Gtk.Widget.Flags

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(Inherited)
Gtk.Widget.Freeze_Child_Notify

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(Inherited)
Gtk.Widget.Get_Allocation_Height

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Gtk.Widget.Get_Allocation_Width

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Gtk.Widget.Get_Allocation_X

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Gtk.Widget.Get_Allocation_Y

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Gtk.Widget.Get_Ancestor

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Gtk.Widget.Get_Child_Requisition

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Gtk.Widget.Get_Child_Visible

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(Inherited)
Gtk.Widget.Get_Colormap

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Gtk.Widget.Get_Composite_Name

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Gtk.Widget.Get_Direction

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Gtk.Widget.Get_Events

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Gtk.Widget.Get_Extension_Events

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Gtk.Widget.Get_Has_Tooltip

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Gtk.Widget.Get_Name

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Gtk.Widget.Get_No_Show_All

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(Inherited)
Gtk.Widget.Get_Pango_Context

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Gtk.Widget.Get_Parent

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(Inherited)
Gtk.Widget.Get_Parent_Window

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(Inherited)
Gtk.Widget.Get_Pointer

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(Inherited)
Gtk.Widget.Get_Root_Window

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Gtk.Widget.Get_Size_Request

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(Inherited)
Gtk.Widget.Get_Snapshot

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(Inherited)
Gtk.Widget.Get_State

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(Inherited)
Gtk.Widget.Get_Style

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(Inherited)
Gtk.Widget.Get_Tooltip_Markup

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(Inherited)
Gtk.Widget.Get_Tooltip_Text

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(Inherited)
Gtk.Widget.Get_Tooltip_Window

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(Inherited)
Gtk.Widget.Get_Toplevel

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Gtk.Widget.Get_Visual

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(Inherited)
Gtk.Widget.Get_Window

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(Inherited)
Gtk.Widget.Grab_Default

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(Inherited)
Gtk.Widget.Grab_Focus

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(Inherited)
Gtk.Widget.Has_Screen

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(Inherited)
Gtk.Widget.Hide

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(Inherited)
Gtk.Widget.Hide_All

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(Inherited)
Gtk.Widget.Input_Shape_Combine_Mask

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(Inherited)
Gtk.Widget.Intersect

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(Inherited)
Gtk.Widget.Is_Ancestor

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(Inherited)
Gtk.Widget.Is_Composited

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(Inherited)
Gtk.Widget.Is_Focus

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(Inherited)
Gtk.Widget.Keynav_Failed

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Gtk.Widget.List_Mnemonic_Labels

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(Inherited)
Gtk.Widget.Map

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(Inherited)
Gtk.Widget.Mnemonic_Activate

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(Inherited)
Gtk.Widget.Modify_Base

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(Inherited)
Gtk.Widget.Modify_Bg

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Gtk.Widget.Modify_Cursor

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Gtk.Widget.Modify_Fg

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(Inherited)
Gtk.Widget.Modify_Font

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Gtk.Widget.Modify_Text

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(Inherited)
Gtk.Widget.Path

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(Inherited)
Gtk.Widget.Path_Reversed

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(Inherited)
Gtk.Widget.Queue_Clear

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(Inherited)
Gtk.Widget.Queue_Clear_Area

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(Inherited)
Gtk.Widget.Queue_Draw

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(Inherited)
Gtk.Widget.Queue_Draw_Area

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(Inherited)
Gtk.Widget.Queue_Resize

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(Inherited)
Gtk.Widget.Queue_Resize_No_Redraw

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(Inherited)
Gtk.Widget.Realize

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(Inherited)
Gtk.Widget.Region_Intersect

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(Inherited)
Gtk.Widget.Remove_Accelerator

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(Inherited)
Gtk.Widget.Remove_Mnemonic_Label

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(Inherited)
Gtk.Widget.Render_Icon

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(Inherited)
Gtk.Widget.Reparent

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(Inherited)
Gtk.Widget.Reset_Rc_Styles

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(Inherited)
Gtk.Widget.Reset_Shapes

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(Inherited)
Gtk.Widget.Restore_Default_Style

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(Inherited)
Gtk.Widget.Send_Expose

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(Inherited)
Gtk.Widget.Set_Accel_Path

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Gtk.Widget.Set_App_Paintable

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Gtk.Widget.Set_Child_Visible

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(Inherited)
Gtk.Widget.Set_Colormap

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(Inherited)
Gtk.Widget.Set_Composite_Name

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(Inherited)
Gtk.Widget.Set_Direction

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(Inherited)
Gtk.Widget.Set_Double_Buffered

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(Inherited)
Gtk.Widget.Set_Events

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(Inherited)
Gtk.Widget.Set_Extension_Events

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(Inherited)
Gtk.Widget.Set_Flags

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(Inherited)
Gtk.Widget.Set_Has_Tooltip

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(Inherited)
Gtk.Widget.Set_Name

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(Inherited)
Gtk.Widget.Set_No_Show_All

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(Inherited)
Gtk.Widget.Set_Parent

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(Inherited)
Gtk.Widget.Set_Parent_Window

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(Inherited)
Gtk.Widget.Set_Redraw_On_Allocate

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(Inherited)
Gtk.Widget.Set_Scroll_Adjustments

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(Inherited)
Gtk.Widget.Set_Sensitive

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Gtk.Widget.Set_Size_Request

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(Inherited)
Gtk.Widget.Set_State

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(Inherited)
Gtk.Widget.Set_Style

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(Inherited)
Gtk.Widget.Set_Tooltip_Markup

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(Inherited)
Gtk.Widget.Set_Tooltip_Text

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(Inherited)
Gtk.Widget.Set_Tooltip_Window

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(Inherited)
Gtk.Widget.Set_UPosition

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Gtk.Widget.Set_USize

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Gtk.Widget.Set_Window

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(Inherited)
Gtk.Widget.Shape_Combine_Mask

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(Inherited)
Gtk.Widget.Show

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(Inherited)
Gtk.Widget.Show_All

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(Inherited)
Gtk.Widget.Show_Now

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(Inherited)
Gtk.Widget.Size_Allocate

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(Inherited)
Gtk.Widget.Size_Request

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(Inherited)
Gtk.Widget.Style_Get_Property

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(Inherited)
Gtk.Widget.Thaw_Child_Notify

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(Inherited)
Gtk.Widget.Trigger_Tooltip_Query

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(Inherited)
Gtk.Widget.Unmap

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(Inherited)
Gtk.Widget.Unrealize

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(Inherited)
Gtk.Widget.Unset_Flags

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(Inherited)
Reset

- To API doc
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Set_Curve_Type

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Set_Gamma

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Set_Range

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Set_Vector

- To API doc
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# Types

### Gtk_Curve

- Goto declaration in source

    type Gtk_Curve is access all Gtk_Curve_Record'Class;

# Constants & Global variables

### Curve_Type_Property

- Goto declaration in source

(Gtk.Enums.Property_Gtk_Curve_Type)

    Curve_Type_Property : constant Gtk.Enums.Property_Gtk_Curve_Type;

### Max_X_Property

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(Glib.Properties.Property_Float)

    Max_X_Property : constant Glib.Properties.Property_Float;

### Max_Y_Property

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(Glib.Properties.Property_Float)

    Max_Y_Property : constant Glib.Properties.Property_Float;

### Min_X_Property

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(Glib.Properties.Property_Float)

    Min_X_Property : constant Glib.Properties.Property_Float;

### Min_Y_Property

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(Glib.Properties.Property_Float)

    Min_Y_Property : constant Glib.Properties.Property_Float;

### Signal_Curve_Type_Changed

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(Glib.Signal_Name)

    Signal_Curve_Type_Changed : constant Glib.Signal_Name := "curve-type-changed";

# Subprograms & Entries

### Gtk_New

- Goto spec in source

    procedure Gtk_New (Curve: out Gtk_Curve);

### Initialize

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    procedure Initialize (Curve: access Gtk_Curve_Record'Class);

### Get_Type

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- Goto body in source

    function Get_Type return Glib.GType;

### Reset

- Goto spec in source

    procedure Reset (Curve: access Gtk_Curve_Record);

Reset the curve. Reset to a straight line from the minimum x & y values to the maximum x & y values (i.e. from the bottom-left to the top-right corners). The curve type is not changed.

### Set_Curve_Type

- Goto spec in source

    procedure Set_Curve_Type (Curve: access Gtk_Curve_Record;The_Type: Gtk.Enums.Gtk_Curve_Type);

Set the type of the curve. The curve will remain unchanged except when changing from a free curve to a linear or spline curve, in which case the curve will be changed as little as possible.

### Set_Gamma

- Goto spec in source

    procedure Set_Gamma (Curve: access Gtk_Curve_Record;Gamma: Gfloat);

Recompute the entire curve using the given gamma value. A gamma value of 1.0 results in a straight line. Values greater than 1.0 result in a curve above the straight line. Values less than 1.0 result in a curve below the straight line. The curve type is changed to Curve_Type_Free.

### Set_Range

- Goto spec in source

    procedure Set_Range (Curve: access Gtk_Curve_Record;Min_X: Gfloat;Max_X: Gfloat;Min_Y: Gfloat;Max_Y: Gfloat);

Set the minimum and maximum x & y values of the curve. The curve is also reset with a call to Reset.

### Set_Vector

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    procedure Set_Vector (Curve: access Gtk_Curve_Record;Vector: Gfloat_Array);

### Get_Vector

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    procedure Get_Vector (Curve: access Gtk_Curve_Record;Vector: out Gfloat_Array);

Set the vector of points on the curve. The curve type is set to Curve_Type_Free.

### +

- Goto spec in source

    function "+" (Widget: access Gtk_Curve_Record'Class) return Gtk.Buildable.Gtk_Buildable renames Implements_Buildable.To_Interface;

### -

- Goto spec in source

    function "-" (Interf: Gtk.Buildable.Gtk_Buildable) return Gtk_Curve renames Implements_Buildable.To_Object;