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GTK+ Reference Manual | |
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| Top | Description | Object Hierarchy | Implemented Interfaces | Properties | Signals | ||||
#include <gtk/gtk.h>
GtkCurve;
GtkWidget* gtk_curve_new (void);
void gtk_curve_reset (GtkCurve *curve);
void gtk_curve_set_gamma (GtkCurve *curve,
gfloat gamma_);
void gtk_curve_set_range (GtkCurve *curve,
gfloat min_x,
gfloat max_x,
gfloat min_y,
gfloat max_y);
void gtk_curve_get_vector (GtkCurve *curve,
int veclen,
gfloat vector[]);
void gtk_curve_set_vector (GtkCurve *curve,
int veclen,
gfloat vector[]);
void gtk_curve_set_curve_type (GtkCurve *curve,
GtkCurveType type);
GObject +----GInitiallyUnowned +----GtkObject +----GtkWidget +----GtkDrawingArea +----GtkCurve
"curve-type" GtkCurveType : Read / Write "max-x" gfloat : Read / Write "max-y" gfloat : Read / Write "min-x" gfloat : Read / Write "min-y" gfloat : Read / Write
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.
typedef struct _GtkCurve GtkCurve;
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.
GtkWidget* gtk_curve_new (void);
gtk_curve_new has been deprecated since version 2.20 and should not be used in newly-written code. Don't use this widget anymore.
Creates a new GtkCurve.
Returns : |
a new GtkCurve. |
void gtk_curve_reset (GtkCurve *curve);
gtk_curve_reset has been deprecated since version 2.20 and should not be used in newly-written code. Don't use this widget anymore.
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.
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a GtkCurve. |
void gtk_curve_set_gamma (GtkCurve *curve,gfloat gamma_);
gtk_curve_set_gamma has been deprecated since version 2.20 and should not be used in newly-written code. Don't use this widget anymore.
Recomputes the entire curve using the given gamma value.
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.
FIXME: Needs a more precise definition of gamma.
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a GtkCurve. |
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the gamma value. |
void gtk_curve_set_range (GtkCurve *curve,gfloat min_x,gfloat max_x,gfloat min_y,gfloat max_y);
gtk_curve_set_range has been deprecated since version 2.20 and should not be used in newly-written code. Don't use this widget anymore.
Sets the minimum and maximum x and y values of the curve.
The curve is also reset with a call to gtk_curve_reset().
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a GtkCurve. |
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the minimum x value. |
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the maximum x value. |
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the minimum y value. |
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the maximum y value. |
void gtk_curve_get_vector (GtkCurve *curve,int veclen,gfloat vector[]);
gtk_curve_get_vector has been deprecated since version 2.20 and should not be used in newly-written code. Don't use this widget anymore.
Returns a vector of points representing the curve.
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a GtkCurve. |
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the number of points to calculate. |
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returns the points. |
void gtk_curve_set_vector (GtkCurve *curve,int veclen,gfloat vector[]);
gtk_curve_set_vector has been deprecated since version 2.20 and should not be used in newly-written code. Don't use this widget anymore.
Sets the vector of points on the curve.
The curve type is set to GTK_CURVE_TYPE_FREE.
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a GtkCurve. |
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the number of points. |
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the points on the curve. |
void gtk_curve_set_curve_type (GtkCurve *curve,GtkCurveType type);
gtk_curve_set_curve_type has been deprecated since version 2.20 and should not be used in newly-written code. Don't use this widget anymore.
Sets 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.
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a GtkCurve. |
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the type of the curve. |
"curve-type" property"curve-type" GtkCurveType : Read / Write
Is this curve linear, spline interpolated, or free-form.
Default value: GTK_CURVE_TYPE_SPLINE
"curve-type-changed" signalvoid user_function (GtkCurve *curve, gpointer user_data) : Run First
Emitted when the curve type has been changed.
The curve type can be changed explicitly with a call to
gtk_curve_set_curve_type(). It is also changed as a side-effect of
calling gtk_curve_reset() or gtk_curve_set_gamma().
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the object which received the signal. |
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user data set when the signal handler was connected. |