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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"><title>GtkAdjustment</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2"><link rel="start" href="index.html" title="GTK+ Reference Manual"><link rel="up" href="MiscObjects.html" title="Miscellaneous"><link rel="prev" href="MiscObjects.html" title="Miscellaneous"><link rel="next" href="GtkArrow.html" title="GtkArrow"><meta name="generator" content="GTK-Doc V1.9 (XML mode)"><link rel="stylesheet" href="style.css" type="text/css"><link rel="part" href="gtk.html" title="Part I. GTK+ Overview"><link rel="part" href="gtkbase.html" title="Part II. GTK+ Core Reference"><link rel="part" href="gtkobjects.html" title="Part III. GTK+ Widgets and Objects"><link rel="chapter" href="ch01.html" title="Object Hierarchy"><link rel="chapter" href="ch02.html" title="Widget Gallery"><link rel="chapter" href="WindowWidgets.html" 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height="24" border="0" alt="Up"></a></td><td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td><th width="100%" align="center">GTK+ Reference Manual</th><td><a accesskey="n" href="GtkArrow.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr><tr><td colspan="5" class="shortcuts"><nobr><a href="#id4206097" class="shortcut">Top</a>  |  <a href="#id4206522" class="shortcut">Description</a>  |  <a href="#id4206322" class="shortcut">Object Hierarchy</a>  |  <a href="#id4206361" class="shortcut">Properties</a>  |  <a href="#id4206483" class="shortcut">Signals</a></nobr></td></tr></table><div class="refentry" lang="en"><a name="GtkAdjustment"></a><div class="titlepage"></div><div class="refnamediv"><table width="100%"><tr><td valign="top"><h2><a name="id4206097"></a><span class="refentrytitle">GtkAdjustment</span></h2><p>GtkAdjustment — A GtkObject representing an adjustable bounded value</p></td><td valign="top" align="right"></td></tr></table></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">#include <gtk/gtk.h> <a class="link" href="GtkAdjustment.html#GtkAdjustment-struct">GtkAdjustment</a>;<a class="link" href="GtkObject.html" title="GtkObject">GtkObject</a>* <a class="link" href="GtkAdjustment.html#gtk-adjustment-new">gtk_adjustment_new</a> (<ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> value, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> lower, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> upper, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> step_increment, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> page_increment, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> page_size);<ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> <a class="link" href="GtkAdjustment.html#gtk-adjustment-get-value">gtk_adjustment_get_value</a> (<a class="link" href="GtkAdjustment.html" title="GtkAdjustment">GtkAdjustment</a> *adjustment);void <a class="link" href="GtkAdjustment.html#gtk-adjustment-set-value">gtk_adjustment_set_value</a> (<a class="link" href="GtkAdjustment.html" title="GtkAdjustment">GtkAdjustment</a> *adjustment, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> value);void <a class="link" href="GtkAdjustment.html#gtk-adjustment-clamp-page">gtk_adjustment_clamp_page</a> (<a class="link" href="GtkAdjustment.html" title="GtkAdjustment">GtkAdjustment</a> *adjustment, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> lower, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> upper);void <a class="link" href="GtkAdjustment.html#gtk-adjustment-changed">gtk_adjustment_changed</a> (<a class="link" href="GtkAdjustment.html" title="GtkAdjustment">GtkAdjustment</a> *adjustment);void <a class="link" href="GtkAdjustment.html#gtk-adjustment-value-changed">gtk_adjustment_value_changed</a> (<a class="link" href="GtkAdjustment.html" title="GtkAdjustment">GtkAdjustment</a> *adjustment);</pre></div><div class="refsect1" lang="en"><a name="id4206322"></a><h2>Object Hierarchy</h2><pre class="synopsis"> <ahref="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a> +----<ahref="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> +----<a class="link" href="GtkObject.html" title="GtkObject">GtkObject</a> +----GtkAdjustment</pre></div><div class="refsect1" lang="en"><a name="id4206361"></a><h2>Properties</h2><pre class="synopsis"> "<a class="link" href="GtkAdjustment.html#GtkAdjustment--lower">lower</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> : Read / Write "<a class="link" href="GtkAdjustment.html#GtkAdjustment--page-increment">page-increment</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> : Read / Write "<a class="link" href="GtkAdjustment.html#GtkAdjustment--page-size">page-size</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> : Read / Write "<a class="link" href="GtkAdjustment.html#GtkAdjustment--step-increment">step-increment</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> : Read / Write "<a class="link" href="GtkAdjustment.html#GtkAdjustment--upper">upper</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> : Read / Write "<a class="link" href="GtkAdjustment.html#GtkAdjustment--value">value</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> : Read / Write</pre></div><div class="refsect1" lang="en"><a name="id4206483"></a><h2>Signals</h2><pre class="synopsis"> "<a class="link" href="GtkAdjustment.html#GtkAdjustment-changed">changed</a>" : Run First / No Recursion "<a class="link" href="GtkAdjustment.html#GtkAdjustment-value-changed">value-changed</a>" : Run First / No Recursion</pre></div><div class="refsect1" lang="en"><a name="id4206522"></a><h2>Description</h2><p>The <a class="link" href="GtkAdjustment.html" title="GtkAdjustment"><span class="type">GtkAdjustment</span></a> object represents a value which has an associated lowerand upper bound, together with step and page increments, and a page size.It is used within several GTK+ widgets, including<a class="link" href="GtkSpinButton.html" title="GtkSpinButton"><span class="type">GtkSpinButton</span></a>, <a class="link" href="GtkViewport.html" title="GtkViewport"><span class="type">GtkViewport</span></a>, and <a class="link" href="GtkRange.html" title="GtkRange"><span class="type">GtkRange</span></a> (which is a base class for<a class="link" href="GtkHScrollbar.html" title="GtkHScrollbar"><span class="type">GtkHScrollbar</span></a>, <a class="link" href="GtkVScrollbar.html" title="GtkVScrollbar"><span class="type">GtkVScrollbar</span></a>, <a class="link" href="GtkHScale.html" title="GtkHScale"><span class="type">GtkHScale</span></a>, and <a class="link" href="GtkVScale.html" title="GtkVScale"><span class="type">GtkVScale</span></a>).</p><p>The <a class="link" href="GtkAdjustment.html" title="GtkAdjustment"><span class="type">GtkAdjustment</span></a> object does not update the value itself. Insteadit is left up to the owner of the <a class="link" href="GtkAdjustment.html" title="GtkAdjustment"><span class="type">GtkAdjustment</span></a> to control the value.</p><p>The owner of the <a class="link" href="GtkAdjustment.html" title="GtkAdjustment"><span class="type">GtkAdjustment</span></a> typically calls the<a class="link" href="GtkAdjustment.html#gtk-adjustment-value-changed"><code class="function">gtk_adjustment_value_changed()</code></a> and <a class="link" href="GtkAdjustment.html#gtk-adjustment-changed"><code class="function">gtk_adjustment_changed()</code></a> functionsafter changing the value and its bounds. This results in the emission of the"value_changed" or "changed" signal respectively.</p></div><div class="refsect1" lang="en"><a name="id4206664"></a><h2>Details</h2><div class="refsect2" lang="en"><a name="id4206674"></a><h3><a name="GtkAdjustment-struct"></a>GtkAdjustment</h3><a class="indexterm" name="id4206688"></a><pre class="programlisting">typedef struct _GtkAdjustment GtkAdjustment;</pre><p>The <a class="link" href="GtkAdjustment.html#GtkAdjustment-struct"><span class="type">GtkAdjustment</span></a> struct contains the following fields.</p><div class="informaltable"><table width="100%" border="0"><colgroup><col><col></colgroup><tbody><tr><td>⌨️ 快捷键说明
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