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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="GtkStatusbar.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="#id3469229" class="shortcut">Top</a>  |  <a href="#id3470092" class="shortcut">Description</a>  |  <a href="#id3469769" class="shortcut">Object Hierarchy</a>  |  <a href="#id3469823" class="shortcut">Implemented Interfaces</a>  |  <a href="#id3469853" class="shortcut">Properties</a>  |  <a href="#id3470041" class="shortcut">Style Properties</a></nobr></td></tr></table><div class="refentry" lang="en"><a name="GtkProgressBar"></a><div class="titlepage"></div><div class="refnamediv"><table width="100%"><tr><td valign="top"><h2><a name="id3469229"></a><span class="refentrytitle">GtkProgressBar</span></h2><p>GtkProgressBar — A widget which indicates progress visually</p></td><td valign="top" align="right"><img src="progressbar.png"></td></tr></table></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">#include <gtk/gtk.h> <a class="link" href="GtkProgressBar.html#GtkProgressBar-struct">GtkProgressBar</a>;<a class="link" href="GtkWidget.html" title="GtkWidget">GtkWidget</a>* <a class="link" href="GtkProgressBar.html#gtk-progress-bar-new">gtk_progress_bar_new</a> (void);void <a class="link" href="GtkProgressBar.html#gtk-progress-bar-pulse">gtk_progress_bar_pulse</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar);void <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-text">gtk_progress_bar_set_text</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar, const <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar">gchar</a> *text);void <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-fraction">gtk_progress_bar_set_fraction</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> fraction);void <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-pulse-step">gtk_progress_bar_set_pulse_step</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> fraction);void <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-orientation">gtk_progress_bar_set_orientation</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar, <a class="link" href="GtkProgressBar.html#GtkProgressBarOrientation">GtkProgressBarOrientation</a> orientation);void <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-ellipsize">gtk_progress_bar_set_ellipsize</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar, <ahref="/usr/share/gtk-doc/html/pango/pango-Layout-Objects.html#PangoEllipsizeMode">PangoEllipsizeMode</a> mode);enum <a class="link" href="GtkProgressBar.html#GtkProgressBarOrientation">GtkProgressBarOrientation</a>;const <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar">gchar</a>* <a class="link" href="GtkProgressBar.html#gtk-progress-bar-get-text">gtk_progress_bar_get_text</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar);<ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> <a class="link" href="GtkProgressBar.html#gtk-progress-bar-get-fraction">gtk_progress_bar_get_fraction</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar);<ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> <a class="link" href="GtkProgressBar.html#gtk-progress-bar-get-pulse-step">gtk_progress_bar_get_pulse_step</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar);<a class="link" href="GtkProgressBar.html#GtkProgressBarOrientation">GtkProgressBarOrientation</a> <a class="link" href="GtkProgressBar.html#gtk-progress-bar-get-orientation">gtk_progress_bar_get_orientation</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar);<ahref="/usr/share/gtk-doc/html/pango/pango-Layout-Objects.html#PangoEllipsizeMode">PangoEllipsizeMode</a> <a class="link" href="GtkProgressBar.html#gtk-progress-bar-get-ellipsize">gtk_progress_bar_get_ellipsize</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar);<a class="link" href="GtkWidget.html" title="GtkWidget">GtkWidget</a>* <a class="link" href="GtkProgressBar.html#gtk-progress-bar-new-with-adjustment">gtk_progress_bar_new_with_adjustment</a> (<a class="link" href="GtkAdjustment.html" title="GtkAdjustment">GtkAdjustment</a> *adjustment);void <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-bar-style">gtk_progress_bar_set_bar_style</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar, <a class="link" href="GtkProgressBar.html#GtkProgressBarStyle">GtkProgressBarStyle</a> style);enum <a class="link" href="GtkProgressBar.html#GtkProgressBarStyle">GtkProgressBarStyle</a>;void <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-discrete-blocks">gtk_progress_bar_set_discrete_blocks</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint">guint</a> blocks);void <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-activity-step">gtk_progress_bar_set_activity_step</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint">guint</a> step);void <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-activity-blocks">gtk_progress_bar_set_activity_blocks</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint">guint</a> blocks);void <a class="link" href="GtkProgressBar.html#gtk-progress-bar-update">gtk_progress_bar_update</a> (<a class="link" href="GtkProgressBar.html" title="GtkProgressBar">GtkProgressBar</a> *pbar, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> percentage);</pre></div><div class="refsect1" lang="en"><a name="id3469769"></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> +----<a class="link" href="GtkWidget.html" title="GtkWidget">GtkWidget</a> +----<a class="link" href="GtkProgress.html" title="GtkProgress">GtkProgress</a> +----GtkProgressBar</pre></div><div class="refsect1" lang="en"><a name="id3469823"></a><h2>Implemented Interfaces</h2><p>GtkProgressBar implements AtkImplementorIface and <a class="link" href="gtk-gtkbuildable.html#GtkBuildable">GtkBuildable</a>.</p></div><div class="refsect1" lang="en"><a name="id3469853"></a><h2>Properties</h2><pre class="synopsis"> "<a class="link" href="GtkProgressBar.html#GtkProgressBar--activity-blocks">activity-blocks</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint">guint</a> : Read / Write "<a class="link" href="GtkProgressBar.html#GtkProgressBar--activity-step">activity-step</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint">guint</a> : Read / Write "<a class="link" href="GtkProgressBar.html#GtkProgressBar--adjustment">adjustment</a>" <a class="link" href="GtkAdjustment.html" title="GtkAdjustment">GtkAdjustment</a> : Read / Write "<a class="link" href="GtkProgressBar.html#GtkProgressBar--bar-style">bar-style</a>" <a class="link" href="GtkProgressBar.html#GtkProgressBarStyle">GtkProgressBarStyle</a> : Read / Write "<a class="link" href="GtkProgressBar.html#GtkProgressBar--discrete-blocks">discrete-blocks</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint">guint</a> : Read / Write "<a class="link" href="GtkProgressBar.html#GtkProgressBar--ellipsize">ellipsize</a>" <ahref="/usr/share/gtk-doc/html/pango/pango-Layout-Objects.html#PangoEllipsizeMode">PangoEllipsizeMode</a> : Read / Write "<a class="link" href="GtkProgressBar.html#GtkProgressBar--fraction">fraction</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> : Read / Write "<a class="link" href="GtkProgressBar.html#GtkProgressBar--orientation">orientation</a>" <a class="link" href="GtkProgressBar.html#GtkProgressBarOrientation">GtkProgressBarOrientation</a> : Read / Write "<a class="link" href="GtkProgressBar.html#GtkProgressBar--pulse-step">pulse-step</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble">gdouble</a> : Read / Write "<a class="link" href="GtkProgressBar.html#GtkProgressBar--text">text</a>" <ahref="/usr/share/gtk-doc/html/gobject/gobject-Standard-Parameter-and-Value-Types.html#gchararray">gchararray</a> : Read / Write</pre></div><div class="refsect1" lang="en"><a name="id3470041"></a><h2>Style Properties</h2><pre class="synopsis"> "<a class="link" href="GtkProgressBar.html#GtkProgressBar--xspacing">xspacing</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> : Read / Write "<a class="link" href="GtkProgressBar.html#GtkProgressBar--yspacing">yspacing</a>" <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint">gint</a> : Read / Write</pre></div><div class="refsect1" lang="en"><a name="id3470092"></a><h2>Description</h2><p>The <a class="link" href="GtkProgressBar.html" title="GtkProgressBar"><span class="type">GtkProgressBar</span></a> is typically used to display the progress of a longrunning operation. It provides a visual clue that processingis underway. The <a class="link" href="GtkProgressBar.html" title="GtkProgressBar"><span class="type">GtkProgressBar</span></a> can be used in two differentmodes: percentage mode and activity mode.</p><p>When an application can determine how much work needs to take place (e.g. read a fixed number of bytes from a file) and can monitor itsprogress, it can use the <a class="link" href="GtkProgressBar.html" title="GtkProgressBar"><span class="type">GtkProgressBar</span></a> in percentage mode and the usersees a growing bar indicating the percentage of the work that hasbeen completed. In this mode, the application is required to call<a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-fraction"><code class="function">gtk_progress_bar_set_fraction()</code></a> periodically to update the progress bar.</p><p>When an application has no accurate way of knowing the amount of workto do, it can use the <a class="link" href="GtkProgressBar.html" title="GtkProgressBar"><span class="type">GtkProgressBar</span></a> in activity mode, which shows activity by a block moving back and forth within the progress area. In this mode,the application is required to call <a class="link" href="GtkProgressBar.html#gtk-progress-bar-pulse"><code class="function">gtk_progress_bar_pulse()</code></a> perodicallyto update the progress bar.</p><p>There is quite a bit of flexibility provided to control the appearanceof the <a class="link" href="GtkProgressBar.html" title="GtkProgressBar"><span class="type">GtkProgressBar</span></a>. Functions are provided to control the orientation of the bar, optional text can be displayed along withthe bar, and the step size used in activity mode can be set.</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p>The <a class="link" href="GtkProgressBar.html" title="GtkProgressBar"><span class="type">GtkProgressBar</span></a>/<a class="link" href="GtkProgress.html" title="GtkProgress"><span class="type">GtkProgress</span></a> API in GTK 1.2 was bloated, needlessly complexand hard to use properly. Therefore <a class="link" href="GtkProgress.html" title="GtkProgress"><span class="type">GtkProgress</span></a> has been deprecatedcompletely and the <a class="link" href="GtkProgressBar.html" title="GtkProgressBar"><span class="type">GtkProgressBar</span></a> API has been reduced to the following 10functions: <a class="link" href="GtkProgressBar.html#gtk-progress-bar-new"><code class="function">gtk_progress_bar_new()</code></a>, <a class="link" href="GtkProgressBar.html#gtk-progress-bar-pulse"><code class="function">gtk_progress_bar_pulse()</code></a>, <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-text"><code class="function">gtk_progress_bar_set_text()</code></a>, <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-fraction"><code class="function">gtk_progress_bar_set_fraction()</code></a>, <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-pulse-step"><code class="function">gtk_progress_bar_set_pulse_step()</code></a>, <a class="link" href="GtkProgressBar.html#gtk-progress-bar-set-orientation"><code class="function">gtk_progress_bar_set_orientation()</code></a>, ⌨️ 快捷键说明
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