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gtk+-devel-1.2.10-6.i686.rpm

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></DIV
><H1
><A
NAME="GTKCURVE"
>GtkCurve</A
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN23858"
></A
><H2
>Name</H2
>GtkCurve&nbsp;--&nbsp;allows direct editing of a curve.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN23861"
></A
><H2
>Synopsis</H2
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="SYNOPSIS"
>&#13;#include &lt;gtk/gtk.h&gt;


struct      <A
HREF="gtkcurve.html#GTKCURVE-STRUCT"
>GtkCurve</A
>;
<A
HREF="gtkwidget.html"
>GtkWidget</A
>*  <A
HREF="gtkcurve.html#GTK-CURVE-NEW"
>gtk_curve_new</A
>                   (void);
void        <A
HREF="gtkcurve.html#GTK-CURVE-RESET"
>gtk_curve_reset</A
>                 (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve);
void        <A
HREF="gtkcurve.html#GTK-CURVE-SET-GAMMA"
>gtk_curve_set_gamma</A
>             (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> gamma);
void        <A
HREF="gtkcurve.html#GTK-CURVE-SET-RANGE"
>gtk_curve_set_range</A
>             (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> min_x,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> max_x,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> min_y,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> max_y);
void        <A
HREF="gtkcurve.html#GTK-CURVE-GET-VECTOR"
>gtk_curve_get_vector</A
>            (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                             int veclen,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> vector[]);
void        <A
HREF="gtkcurve.html#GTK-CURVE-SET-VECTOR"
>gtk_curve_set_vector</A
>            (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                             int veclen,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> vector[]);
void        <A
HREF="gtkcurve.html#GTK-CURVE-SET-CURVE-TYPE"
>gtk_curve_set_curve_type</A
>        (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                             <A
HREF="gtk-standard-enumerations.html#GTKCURVETYPE"
>GtkCurveType</A
> type);&#13;</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN23887"
></A
><H2
>Object Hierarchy</H2
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="SYNOPSIS"
>&#13;  <A
HREF="gtkobject.html"
>GtkObject</A
>
   +----<A
HREF="gtkwidget.html"
>GtkWidget</A
>
         +----<A
HREF="gtkdrawingarea.html"
>GtkDrawingArea</A
>
               +----GtkCurve</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN23893"
></A
><H2
>Signal Prototypes</H2
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="SYNOPSIS"
>&#13;&quot;<A
HREF="gtkcurve.html#GTKCURVE-CURVE-TYPE-CHANGED"
>curve-type-changed</A
>&quot;
            void        user_function      (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                            <A
HREF=../glib/glib-basic-types.html#GPOINTER
>gpointer</A> user_data);</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN23899"
></A
><H2
>Description</H2
><P
>The <A
HREF="gtkcurve.html"
>GtkCurve</A
> 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.</P
><P
>The <A
HREF="gtkcurve.html"
>GtkCurve</A
> 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.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN23905"
></A
><H2
>Details</H2
><DIV
CLASS="REFSECT2"
><A
NAME="AEN23907"
></A
><H3
><A
NAME="GTKCURVE-STRUCT"
></A
>struct GtkCurve</H3
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>struct GtkCurve;</PRE
></TD
></TR
></TABLE
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN23911"
></A
><H3
><A
NAME="GTK-CURVE-NEW"
></A
>gtk_curve_new ()</H3
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
><A
HREF="gtkwidget.html"
>GtkWidget</A
>*  gtk_curve_new                   (void);</PRE
></TD
></TR
></TABLE
><P
>Creates a new <A
HREF="gtkcurve.html"
>GtkCurve</A
>.</P
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN23918"
></A
><P
></P
><TABLE
BORDER="0"
WIDTH="100%"
BGCOLOR="#FFD0D0"
CELLSPACING="0"
CELLPADDING="4"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><I
CLASS="EMPHASIS"
>Returns</I
> :</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>a new <A
HREF="gtkcurve.html"
>GtkCurve</A
>.
&#13;</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN23928"
></A
><H3
><A
NAME="GTK-CURVE-RESET"
></A
>gtk_curve_reset ()</H3
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>void        gtk_curve_reset                 (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve);</PRE
></TD
></TR
></TABLE
><P
>Resets the curve to a straight line from the minimum x &#38; y values to the
maximum x &#38; y values (i.e. from the bottom-left to the top-right corners).
The curve type is not changed.</P
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN23934"
></A
><P
></P
><TABLE
BORDER="0"
WIDTH="100%"
BGCOLOR="#FFD0D0"
CELLSPACING="0"
CELLPADDING="4"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>curve</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>a <A
HREF="gtkcurve.html"
>GtkCurve</A
>.
&#13;</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN23944"
></A
><H3
><A
NAME="GTK-CURVE-SET-GAMMA"
></A
>gtk_curve_set_gamma ()</H3
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>void        gtk_curve_set_gamma             (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> gamma);</PRE
></TD
></TR
></TABLE
><P
>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 <TT
CLASS="LITERAL"
>GTK_CURVE_TYPE_FREE</TT
>.
FIXME: Needs a more precise definition of gamma.</P
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN23952"
></A
><P
></P
><TABLE
BORDER="0"
WIDTH="100%"
BGCOLOR="#FFD0D0"
CELLSPACING="0"
CELLPADDING="4"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>curve</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>a <A
HREF="gtkcurve.html"
>GtkCurve</A
>.</TD
></TR
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>gamma</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>the gamma value.
&#13;</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN23966"
></A
><H3
><A
NAME="GTK-CURVE-SET-RANGE"
></A
>gtk_curve_set_range ()</H3
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>void        gtk_curve_set_range             (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> min_x,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> max_x,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> min_y,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> max_y);</PRE
></TD
></TR
></TABLE
><P
>Sets the minimum and maximum x &#38; y values of the curve.
The curve is also reset with a call to <A
HREF="gtkcurve.html#GTK-CURVE-RESET"
>gtk_curve_reset</A
>().</P
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN23977"
></A
><P
></P
><TABLE
BORDER="0"
WIDTH="100%"
BGCOLOR="#FFD0D0"
CELLSPACING="0"
CELLPADDING="4"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>curve</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>a <A
HREF="gtkcurve.html"
>GtkCurve</A
>.</TD
></TR
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>min_x</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>the minimum x value.</TD
></TR
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>max_x</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>the maximum x value.</TD
></TR
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>min_y</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>the minimum y value.</TD
></TR
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>max_y</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>the maximum y value.
&#13;</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN24003"
></A
><H3
><A
NAME="GTK-CURVE-GET-VECTOR"
></A
>gtk_curve_get_vector ()</H3
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>void        gtk_curve_get_vector            (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                             int veclen,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> vector[]);</PRE
></TD
></TR
></TABLE
><P
>Returns a vector of points representing the curve.</P
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN24010"
></A
><P
></P
><TABLE
BORDER="0"
WIDTH="100%"
BGCOLOR="#FFD0D0"
CELLSPACING="0"
CELLPADDING="4"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>curve</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>a <A
HREF="gtkcurve.html"
>GtkCurve</A
>.</TD
></TR
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>veclen</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>the number of points to calculate.</TD
></TR
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>vector</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>returns the points.
&#13;</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN24028"
></A
><H3
><A
NAME="GTK-CURVE-SET-VECTOR"
></A
>gtk_curve_set_vector ()</H3
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>void        gtk_curve_set_vector            (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                             int veclen,
                                             <A
HREF=../glib/glib-basic-types.html#GFLOAT
>gfloat</A> vector[]);</PRE
></TD
></TR
></TABLE
><P
>Sets the vector of points on the curve.
The curve type is set to <TT
CLASS="LITERAL"
>GTK_CURVE_TYPE_FREE</TT
>.</P
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN24036"
></A
><P
></P
><TABLE
BORDER="0"
WIDTH="100%"
BGCOLOR="#FFD0D0"
CELLSPACING="0"
CELLPADDING="4"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>curve</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>a <A
HREF="gtkcurve.html"
>GtkCurve</A
>.</TD
></TR
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>veclen</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>the number of points.</TD
></TR
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>vector</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>the points on the curve.
&#13;</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><HR><DIV
CLASS="REFSECT2"
><A
NAME="AEN24054"
></A
><H3
><A
NAME="GTK-CURVE-SET-CURVE-TYPE"
></A
>gtk_curve_set_curve_type ()</H3
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>void        gtk_curve_set_curve_type        (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                             <A
HREF="gtk-standard-enumerations.html#GTKCURVETYPE"
>GtkCurveType</A
> type);</PRE
></TD
></TR
></TABLE
><P
>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.</P
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN24061"
></A
><P
></P
><TABLE
BORDER="0"
WIDTH="100%"
BGCOLOR="#FFD0D0"
CELLSPACING="0"
CELLPADDING="4"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>curve</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>a <A
HREF="gtkcurve.html"
>GtkCurve</A
>.</TD
></TR
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>type</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>the type of the curve.
&#13;</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN24075"
></A
><H2
>Signals</H2
><DIV
CLASS="REFSECT2"
><A
NAME="AEN24077"
></A
><H3
><A
NAME="GTKCURVE-CURVE-TYPE-CHANGED"
></A
>The &quot;curve-type-changed&quot; signal</H3
><TABLE
BORDER="0"
BGCOLOR="#D6E8FF"
WIDTH="100%"
CELLPADDING="6"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>void        user_function                  (<A
HREF="gtkcurve.html"
>GtkCurve</A
> *curve,
                                            <A
HREF=../glib/glib-basic-types.html#GPOINTER
>gpointer</A> user_data);</PRE
></TD
></TR
></TABLE
><P
>Emitted when the curve type has been changed.
The curve type can be changed explicitly with a call to
<A
HREF="gtkcurve.html#GTK-CURVE-SET-CURVE-TYPE"
>gtk_curve_set_curve_type</A
>(). It is also changed as a side-effect of
calling <A
HREF="gtkcurve.html#GTK-CURVE-RESET"
>gtk_curve_reset</A
>() or <A
HREF="gtkcurve.html#GTK-CURVE-SET-GAMMA"
>gtk_curve_set_gamma</A
>().</P
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN24087"
></A
><P
></P
><TABLE
BORDER="0"
WIDTH="100%"
BGCOLOR="#FFD0D0"
CELLSPACING="0"
CELLPADDING="4"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
WIDTH="20%"
ALIGN="RIGHT"
VALIGN="TOP"
><TT
CLASS="PARAMETER"
><I
>curve</I
></TT
>&nbsp;:</TD
><TD
WIDTH="80%"
ALIGN="LEFT"
VALIGN="TOP"
>the object which received the signal.&#13;</TD
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><I
>user_data</I
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>&nbsp;:</TD
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>user data set when the signal handler was connected.</TD
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><A
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>GtkGammaCurve</A
></DT
><DD
><P
>a subclass for editing gamma curves.</P
></DD
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