GtkCurve {RGtk2} | R Documentation

## GtkCurve

### Description

Allows direct editing of a curve

### Methods and Functions

`gtkCurveNew(show = TRUE)`
`gtkCurveReset(object)`
`gtkCurveSetGamma(object, gamma)`
`gtkCurveSetRange(object, min.x, max.x, min.y, max.y)`
`gtkCurveGetVector(object, veclen)`
`gtkCurveSetVector(object, vector)`
`gtkCurveSetCurveType(object, type)`
`gtkCurve(show = TRUE)`

### Hierarchy

    GObject
       +----GInitiallyUnowned
             +----GtkObject
                   +----GtkWidget
                         +----GtkDrawingArea
                               +----GtkCurve

### Interfaces

GtkCurve implements AtkImplementorIface and `GtkBuildable`.

### Detailed Description

The `GtkCurve` 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 `GtkCurve` 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.

As of GTK+ 2.20, `GtkCurve` has been deprecated since it is too specialized.

### Structures

`GtkCurve`

  WARNING: `GtkCurve` is deprecated and should not be used in newly-written code. The `GtkCurve` struct contains private data only, and should be accessed using the functions below.

### Convenient Construction

`gtkCurve` is the equivalent of `gtkCurveNew`.

### Signals

`curve-type-changed(curve, user.data)`

  Emitted when the curve type has been changed. The curve type can be changed explicitly with a call to `gtkCurveSetCurveType`. It is also changed as a side-effect of calling `gtkCurveReset` or `gtkCurveSetGamma`.

  `curve`

    the object which received the signal.

  `user.data`

    user data set when the signal handler was connected.

### Properties

`curve-type` [`GtkCurveType` : Read / Write]

  Is this curve linear, spline interpolated, or free-form. Default value: GTK_CURVE_TYPE_SPLINE

`max-x` [numeric : Read / Write]

  Maximum possible X value. Default value: 1

`max-y` [numeric : Read / Write]

  Maximum possible value for Y. Default value: 1

`min-x` [numeric : Read / Write]

  Minimum possible value for X. Default value: 0

`min-y` [numeric : Read / Write]

  Minimum possible value for Y. Default value: 0

### Author(s)

Derived by RGtkGen from GTK+ documentation

### References

https://developer.gnome.org/gtk2/stable/GtkCurve.html

[Package RGtk2 version 2.20.36.3 Index]