gtk.Curve allows direct editing of a curve. Synopsis gtk.Curve gtk.DrawingArea gtk.Curve reset set_gamma gamma set_range min_x max_x min_y max_y get_vector size-1 set_vector vector set_curve_type type Ancestry +-- gobject.GObject +-- gtk.Object +-- gtk.Widget +-- gtk.DrawingArea +-- gtk.Curve Implemented Interfaces gtk.Curve implements gtk.Buildable gtk.Curve Properties gtk.Object Properties gtk.Widget Properties
"curve-type" Read/Write The curve type. One of linear (gtk.CURVE_TYPE_LINEAR), spline interpolated (gtk.CURVE_TYPE_SPLINE), or free-form (gtk.CURVE_TYPE_FREE). "max-x" Read/Write The maximum possible value for X "max-y" Read/Write The maximum possible value for Y "min-x" Read/Write The minimum possible value for X "min-y" Read/Write The minimum possible value for Y
gtk.Curve Style Properties gtk.Widget Style Properties gtk.Curve Signal Prototypes gobject.GObject Signal Prototypes gtk.Object Signal Prototypes gtk.Widget Signal Prototypes "curve-type-changed" callback curve widget user_param1 ... Description gtk.Curve is deprecated in GTK+ 2.20 and PyGTK 2.22 since it is too specialized. 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. Constructor gtk.Curve Returns : a new gtk.Curve object Creates a new gtk.Curve object Methods gtk.Curve.reset reset The reset() method resets the curve to a straight line from the minimum x and y values to the maximum x and y values (i.e. from the bottom-left to the top-right corners). The curve type is not changed. gtk.Curve.set_gamma set_gamma gamma gamma : the gamma value The set_gamma() method recomputes the entire curve using the value in gamma. A gamma value of 1 results in a straight line. Values greater than 1 result in a curve above the straight line. Values less than 1 result in a curve below the straight line. The curve type is changed to gtk.CURVE_TYPE_FREE. gtk.Curve.set_range set_range min_x max_x min_y max_y min_x : the new minimum x value max_x : the maximum x value. min_y : the new minimum y value max_y : the maximum y value. The set_range() method sets the "min-x", "min-y", "max-x" and "max-y" properties from min_x, min_y, max_x, and max_y. The curve is also reset with a call to reset(). gtk.Curve.get_vector get_vector size-1 size : the number of points to return or -1 to return all the points in the curve. Returns : a tuple containing the points The get_vector() method returns a tuple of points representing the curve. The number of points to return is specified by size; if size is -1 all the points in the curve are returned. gtk.Curve.set_vector set_vector vector vector : a list or tuple containing the points of the curve The set_vector() method sets the curve using the points in vector. The curve type is set to gtk.CURVE_TYPE_FREE. gtk.Curve.set_curve_type set_curve_type type type : the new curve type: gtk.CURVE_TYPE_LINEAR, gtk.CURVE_TYPE_SPLINE or gtk.CURVE_TYPE_FREE The set_curve_type() method sets the "curve-type" property with the value of type. The curve type must be one of gtk.CURVE_TYPE_LINEAR, gtk.CURVE_TYPE_SPLINE or gtk.CURVE_TYPE_FREE. 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. Signals The "curve-type-changed" gtk.Curve Signal callback curve user_param1 ... curve : the curve that received the signal user_param1 : the first user parameter (if any) specified with the connect() method ... : additional user parameters (if any) The "curve-type-changed" signal is emitted when the curve type has been changed. The curve type can be changed explicitly with a call to set_curve_type(). It is also changed as a side-effect of calling reset() or set_gamma()