332 lines
16 KiB
HTML
332 lines
16 KiB
HTML
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<title>GtkAspectFrame: GTK+ 3 Reference Manual</title>
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<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span>
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<a href="#GtkAspectFrame.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span>
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<a href="#GtkAspectFrame.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_interfaces"> <span class="dim">|</span>
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<a href="#GtkAspectFrame.implemented-interfaces" class="shortcut">Implemented Interfaces</a></span><span id="nav_properties"> <span class="dim">|</span>
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<a href="#GtkAspectFrame.properties" class="shortcut">Properties</a></span>
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<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
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<a name="GtkAspectFrame"></a><div class="titlepage"></div>
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<div class="refnamediv"><table width="100%"><tr>
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<td valign="top">
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<h2><span class="refentrytitle"><a name="GtkAspectFrame.top_of_page"></a>GtkAspectFrame</span></h2>
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<p>GtkAspectFrame — A frame that constrains its child to a particular aspect ratio</p>
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</td>
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<td class="gallery_image" valign="top" align="right"></td>
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</tr></table></div>
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<div class="refsect1">
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<a name="GtkAspectFrame.functions"></a><h2>Functions</h2>
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<div class="informaltable"><table class="informaltable" width="100%" border="0">
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<colgroup>
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<col width="150px" class="functions_return">
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<col class="functions_name">
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</colgroup>
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<tbody>
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<tr>
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<td class="function_type">
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<a class="link" href="GtkWidget.html" title="GtkWidget"><span class="returnvalue">GtkWidget</span></a> *
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</td>
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<td class="function_name">
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<a class="link" href="GtkAspectFrame.html#gtk-aspect-frame-new" title="gtk_aspect_frame_new ()">gtk_aspect_frame_new</a> <span class="c_punctuation">()</span>
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</td>
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</tr>
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<tr>
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<td class="function_type">
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<span class="returnvalue">void</span>
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</td>
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<td class="function_name">
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<a class="link" href="GtkAspectFrame.html#gtk-aspect-frame-set" title="gtk_aspect_frame_set ()">gtk_aspect_frame_set</a> <span class="c_punctuation">()</span>
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<div class="refsect1">
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<a name="GtkAspectFrame.properties"></a><h2>Properties</h2>
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<div class="informaltable"><table class="informaltable" border="0">
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<colgroup>
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<col width="150px" class="properties_type">
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<col width="300px" class="properties_name">
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<col width="200px" class="properties_flags">
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</colgroup>
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<tbody>
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<tr>
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<td class="property_type"><span class="type">gboolean</span></td>
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<td class="property_name"><a class="link" href="GtkAspectFrame.html#GtkAspectFrame--obey-child" title="The “obey-child” property">obey-child</a></td>
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<td class="property_flags">Read / Write</td>
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</tr>
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<tr>
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<td class="property_type"><span class="type">gfloat</span></td>
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<td class="property_name"><a class="link" href="GtkAspectFrame.html#GtkAspectFrame--ratio" title="The “ratio” property">ratio</a></td>
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<td class="property_flags">Read / Write</td>
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</tr>
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<tr>
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<td class="property_type"><span class="type">gfloat</span></td>
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<td class="property_name"><a class="link" href="GtkAspectFrame.html#GtkAspectFrame--xalign" title="The “xalign” property">xalign</a></td>
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<td class="property_flags">Read / Write</td>
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</tr>
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<tr>
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<td class="property_type"><span class="type">gfloat</span></td>
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<td class="property_name"><a class="link" href="GtkAspectFrame.html#GtkAspectFrame--yalign" title="The “yalign” property">yalign</a></td>
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<td class="property_flags">Read / Write</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<div class="refsect1">
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<a name="GtkAspectFrame.other"></a><h2>Types and Values</h2>
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<div class="informaltable"><table class="informaltable" width="100%" border="0">
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<colgroup>
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<col width="150px" class="name">
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<col class="description">
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</colgroup>
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<tbody>
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<tr>
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<td class="datatype_keyword">struct</td>
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<td class="function_name"><a class="link" href="GtkAspectFrame.html#GtkAspectFrame-struct" title="struct GtkAspectFrame">GtkAspectFrame</a></td>
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</tr>
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<tr>
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<td class="datatype_keyword">struct</td>
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<td class="function_name"><a class="link" href="GtkAspectFrame.html#GtkAspectFrameClass" title="struct GtkAspectFrameClass">GtkAspectFrameClass</a></td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<div class="refsect1">
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<a name="GtkAspectFrame.object-hierarchy"></a><h2>Object Hierarchy</h2>
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<pre class="screen"> GObject
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<span class="lineart">╰──</span> GInitiallyUnowned
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<span class="lineart">╰──</span> <a class="link" href="GtkWidget.html" title="GtkWidget">GtkWidget</a>
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<span class="lineart">╰──</span> <a class="link" href="GtkContainer.html" title="GtkContainer">GtkContainer</a>
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<span class="lineart">╰──</span> <a class="link" href="GtkBin.html" title="GtkBin">GtkBin</a>
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<span class="lineart">╰──</span> <a class="link" href="GtkFrame.html" title="GtkFrame">GtkFrame</a>
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<span class="lineart">╰──</span> GtkAspectFrame
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</pre>
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</div>
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<div class="refsect1">
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<a name="GtkAspectFrame.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
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<p>
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GtkAspectFrame implements
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AtkImplementorIface and <a class="link" href="GtkBuildable.html" title="GtkBuildable">GtkBuildable</a>.</p>
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</div>
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<div class="refsect1">
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<a name="GtkAspectFrame.includes"></a><h2>Includes</h2>
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<pre class="synopsis">#include <gtk/gtk.h>
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</pre>
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</div>
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<div class="refsect1">
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<a name="GtkAspectFrame.description"></a><h2>Description</h2>
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<p>The <a class="link" href="GtkAspectFrame.html" title="GtkAspectFrame"><span class="type">GtkAspectFrame</span></a> is useful when you want
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pack a widget so that it can resize but always retains
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the same aspect ratio. For instance, one might be
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drawing a small preview of a larger image. <a class="link" href="GtkAspectFrame.html" title="GtkAspectFrame"><span class="type">GtkAspectFrame</span></a>
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derives from <a class="link" href="GtkFrame.html" title="GtkFrame"><span class="type">GtkFrame</span></a>, so it can draw a label and
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a frame around the child. The frame will be
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“shrink-wrapped” to the size of the child.</p>
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<div class="refsect2">
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<a name="id-1.3.7.19.9.3"></a><h3>CSS nodes</h3>
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<p>GtkAspectFrame uses a CSS node with name frame.</p>
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</div>
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</div>
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<div class="refsect1">
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<a name="GtkAspectFrame.functions_details"></a><h2>Functions</h2>
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<div class="refsect2">
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<a name="gtk-aspect-frame-new"></a><h3>gtk_aspect_frame_new ()</h3>
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<pre class="programlisting"><a class="link" href="GtkWidget.html" title="GtkWidget"><span class="returnvalue">GtkWidget</span></a> *
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gtk_aspect_frame_new (<em class="parameter"><code>const <span class="type">gchar</span> *label</code></em>,
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<em class="parameter"><code><span class="type">gfloat</span> xalign</code></em>,
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<em class="parameter"><code><span class="type">gfloat</span> yalign</code></em>,
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<em class="parameter"><code><span class="type">gfloat</span> ratio</code></em>,
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<em class="parameter"><code><span class="type">gboolean</span> obey_child</code></em>);</pre>
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<p>Create a new <a class="link" href="GtkAspectFrame.html" title="GtkAspectFrame"><span class="type">GtkAspectFrame</span></a>.</p>
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<div class="refsect3">
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<a name="gtk-aspect-frame-new.parameters"></a><h4>Parameters</h4>
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<div class="informaltable"><table class="informaltable" width="100%" border="0">
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<colgroup>
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<col width="150px" class="parameters_name">
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<col class="parameters_description">
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<col width="200px" class="parameters_annotations">
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</colgroup>
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<tbody>
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<tr>
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<td class="parameter_name"><p>label</p></td>
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<td class="parameter_description"><p>Label text. </p></td>
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<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
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</tr>
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<tr>
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<td class="parameter_name"><p>xalign</p></td>
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<td class="parameter_description"><p>Horizontal alignment of the child within the allocation of
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the <a class="link" href="GtkAspectFrame.html" title="GtkAspectFrame"><span class="type">GtkAspectFrame</span></a>. This ranges from 0.0 (left aligned)
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to 1.0 (right aligned)</p></td>
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<td class="parameter_annotations"> </td>
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</tr>
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<tr>
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<td class="parameter_name"><p>yalign</p></td>
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<td class="parameter_description"><p>Vertical alignment of the child within the allocation of
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the <a class="link" href="GtkAspectFrame.html" title="GtkAspectFrame"><span class="type">GtkAspectFrame</span></a>. This ranges from 0.0 (top aligned)
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to 1.0 (bottom aligned)</p></td>
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<td class="parameter_annotations"> </td>
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</tr>
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<tr>
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<td class="parameter_name"><p>ratio</p></td>
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<td class="parameter_description"><p>The desired aspect ratio.</p></td>
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<td class="parameter_annotations"> </td>
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</tr>
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<tr>
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<td class="parameter_name"><p>obey_child</p></td>
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<td class="parameter_description"><p>If <code class="literal">TRUE</code>, <em class="parameter"><code>ratio</code></em>
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is ignored, and the aspect
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ratio is taken from the requistion of the child.</p></td>
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<td class="parameter_annotations"> </td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<div class="refsect3">
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<a name="gtk-aspect-frame-new.returns"></a><h4>Returns</h4>
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<p> the new <a class="link" href="GtkAspectFrame.html" title="GtkAspectFrame"><span class="type">GtkAspectFrame</span></a>.</p>
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</div>
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</div>
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<hr>
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<div class="refsect2">
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<a name="gtk-aspect-frame-set"></a><h3>gtk_aspect_frame_set ()</h3>
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<pre class="programlisting"><span class="returnvalue">void</span>
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gtk_aspect_frame_set (<em class="parameter"><code><a class="link" href="GtkAspectFrame.html" title="GtkAspectFrame"><span class="type">GtkAspectFrame</span></a> *aspect_frame</code></em>,
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<em class="parameter"><code><span class="type">gfloat</span> xalign</code></em>,
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<em class="parameter"><code><span class="type">gfloat</span> yalign</code></em>,
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<em class="parameter"><code><span class="type">gfloat</span> ratio</code></em>,
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<em class="parameter"><code><span class="type">gboolean</span> obey_child</code></em>);</pre>
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<p>Set parameters for an existing <a class="link" href="GtkAspectFrame.html" title="GtkAspectFrame"><span class="type">GtkAspectFrame</span></a>.</p>
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<div class="refsect3">
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<a name="gtk-aspect-frame-set.parameters"></a><h4>Parameters</h4>
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<div class="informaltable"><table class="informaltable" width="100%" border="0">
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<colgroup>
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<col width="150px" class="parameters_name">
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<col class="parameters_description">
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<col width="200px" class="parameters_annotations">
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</colgroup>
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<tbody>
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<tr>
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<td class="parameter_name"><p>aspect_frame</p></td>
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<td class="parameter_description"><p>a <a class="link" href="GtkAspectFrame.html" title="GtkAspectFrame"><span class="type">GtkAspectFrame</span></a></p></td>
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<td class="parameter_annotations"> </td>
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</tr>
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<tr>
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<td class="parameter_name"><p>xalign</p></td>
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<td class="parameter_description"><p>Horizontal alignment of the child within the allocation of
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the <a class="link" href="GtkAspectFrame.html" title="GtkAspectFrame"><span class="type">GtkAspectFrame</span></a>. This ranges from 0.0 (left aligned)
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to 1.0 (right aligned)</p></td>
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<td class="parameter_annotations"> </td>
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</tr>
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<tr>
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<td class="parameter_name"><p>yalign</p></td>
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<td class="parameter_description"><p>Vertical alignment of the child within the allocation of
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the <a class="link" href="GtkAspectFrame.html" title="GtkAspectFrame"><span class="type">GtkAspectFrame</span></a>. This ranges from 0.0 (top aligned)
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to 1.0 (bottom aligned)</p></td>
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<td class="parameter_annotations"> </td>
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</tr>
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<tr>
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<td class="parameter_name"><p>ratio</p></td>
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<td class="parameter_description"><p>The desired aspect ratio.</p></td>
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<td class="parameter_annotations"> </td>
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</tr>
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<tr>
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<td class="parameter_name"><p>obey_child</p></td>
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<td class="parameter_description"><p>If <code class="literal">TRUE</code>, <em class="parameter"><code>ratio</code></em>
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is ignored, and the aspect
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ratio is taken from the requistion of the child.</p></td>
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<td class="parameter_annotations"> </td>
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</tr>
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</tbody>
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</table></div>
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</div>
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</div>
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</div>
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<div class="refsect1">
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<a name="GtkAspectFrame.other_details"></a><h2>Types and Values</h2>
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<div class="refsect2">
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<a name="GtkAspectFrame-struct"></a><h3>struct GtkAspectFrame</h3>
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<pre class="programlisting">struct GtkAspectFrame;</pre>
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</div>
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<hr>
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<div class="refsect2">
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<a name="GtkAspectFrameClass"></a><h3>struct GtkAspectFrameClass</h3>
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<pre class="programlisting">struct GtkAspectFrameClass {
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GtkFrameClass parent_class;
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};
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</pre>
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<div class="refsect3">
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<a name="GtkAspectFrameClass.members"></a><h4>Members</h4>
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<div class="informaltable"><table class="informaltable" width="100%" border="0">
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<colgroup>
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<col width="300px" class="struct_members_name">
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<col class="struct_members_description">
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<col width="200px" class="struct_members_annotations">
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</colgroup>
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<tbody></tbody>
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</table></div>
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</div>
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</div>
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</div>
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<div class="refsect1">
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<a name="GtkAspectFrame.property-details"></a><h2>Property Details</h2>
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<div class="refsect2">
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<a name="GtkAspectFrame--obey-child"></a><h3>The <code class="literal">“obey-child”</code> property</h3>
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<pre class="programlisting"> “obey-child” <span class="type">gboolean</span></pre>
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<p>Force aspect ratio to match that of the frame's child.</p>
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<p>Flags: Read / Write</p>
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<p>Default value: TRUE</p>
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</div>
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<hr>
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<div class="refsect2">
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<a name="GtkAspectFrame--ratio"></a><h3>The <code class="literal">“ratio”</code> property</h3>
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<pre class="programlisting"> “ratio” <span class="type">gfloat</span></pre>
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<p>Aspect ratio if obey_child is FALSE.</p>
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<p>Flags: Read / Write</p>
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<p>Allowed values: [0.0001,10000]</p>
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<p>Default value: 1</p>
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</div>
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<hr>
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<div class="refsect2">
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<a name="GtkAspectFrame--xalign"></a><h3>The <code class="literal">“xalign”</code> property</h3>
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<pre class="programlisting"> “xalign” <span class="type">gfloat</span></pre>
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<p>X alignment of the child.</p>
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<p>Flags: Read / Write</p>
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<p>Allowed values: [0,1]</p>
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<p>Default value: 0.5</p>
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</div>
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<hr>
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<div class="refsect2">
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<a name="GtkAspectFrame--yalign"></a><h3>The <code class="literal">“yalign”</code> property</h3>
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<pre class="programlisting"> “yalign” <span class="type">gfloat</span></pre>
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<p>Y alignment of the child.</p>
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<p>Flags: Read / Write</p>
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<p>Allowed values: [0,1]</p>
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<p>Default value: 0.5</p>
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</div>
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</div>
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</div>
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<div class="footer">
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<hr>Generated by GTK-Doc V1.29</div>
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