gtkadjustment.html

最新gtk中文资料集

<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
><span class="type">gdouble</span></a> lower;</td>
<td>the minimum value.</td>
</tr>
<tr>
<td>
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
><span class="type">gdouble</span></a> upper;</td>
<td>the maximum value.</td>
</tr>
<tr>
<td>
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
><span class="type">gdouble</span></a> value;</td>
<td>the current value.</td>
</tr>
<tr>
<td>
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
><span class="type">gdouble</span></a> step_increment;</td>
<td>the increment to use to make minor changes to the value.
In a <a class="link" href="GtkScrollbar.html" title="GtkScrollbar"><span class="type">GtkScrollbar</span></a> this increment is used when the mouse is clicked on the
arrows at the top and bottom of the scrollbar, to scroll by a small amount.
</td>
</tr>
<tr>
<td>
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
><span class="type">gdouble</span></a> page_increment;</td>
<td>the increment to use to make major changes to the value.
In a <a class="link" href="GtkScrollbar.html" title="GtkScrollbar"><span class="type">GtkScrollbar</span></a> this increment is used when the mouse is clicked in the
trough, to scroll by a large amount.
</td>
</tr>
<tr>
<td>
<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
><span class="type">gdouble</span></a> page_size;</td>
<td>the page size.
In a <a class="link" href="GtkScrollbar.html" title="GtkScrollbar"><span class="type">GtkScrollbar</span></a> this is the size of the area which is currently visible.
</td>
</tr>
</tbody>
</table></div>
<p>

</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id4206872"></a><h3>
<a name="gtk-adjustment-new"></a>gtk_adjustment_new ()</h3>
<a class="indexterm" name="id4206886"></a><pre class="programlisting"><a class="link" href="GtkObject.html" title="GtkObject">GtkObject</a>*          gtk_adjustment_new                  (<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
>gdouble</a> value,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
>gdouble</a> lower,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
>gdouble</a> upper,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
>gdouble</a> step_increment,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
>gdouble</a> page_increment,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
>gdouble</a> page_size);</pre>
<p>
Creates a new <a class="link" href="GtkAdjustment.html" title="GtkAdjustment"><span class="type">GtkAdjustment</span></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em>&#160;:</span></p></td>
<td>the initial value.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>lower</code></em>&#160;:</span></p></td>
<td>the minimum value.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>upper</code></em>&#160;:</span></p></td>
<td>the maximum value.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>step_increment</code></em>&#160;:</span></p></td>
<td>the step increment.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>page_increment</code></em>&#160;:</span></p></td>
<td>the page increment.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>page_size</code></em>&#160;:</span></p></td>
<td>the page size.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td>a new <a class="link" href="GtkAdjustment.html" title="GtkAdjustment"><span class="type">GtkAdjustment</span></a>.


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id4207066"></a><h3>
<a name="gtk-adjustment-get-value"></a>gtk_adjustment_get_value ()</h3>
<a class="indexterm" name="id4207079"></a><pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
>gdouble</a>             gtk_adjustment_get_value            (<a class="link" href="GtkAdjustment.html" title="GtkAdjustment">GtkAdjustment</a> *adjustment);</pre>
<p>
Gets the current value of the adjustment. See
<a class="link" href="GtkAdjustment.html#gtk-adjustment-set-value"><code class="function">gtk_adjustment_set_value()</code></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>adjustment</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="GtkAdjustment.html" title="GtkAdjustment"><span class="type">GtkAdjustment</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> The current value of the adjustment.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id4207160"></a><h3>
<a name="gtk-adjustment-set-value"></a>gtk_adjustment_set_value ()</h3>
<a class="indexterm" name="id4207173"></a><pre class="programlisting">void                gtk_adjustment_set_value            (<a class="link" href="GtkAdjustment.html" title="GtkAdjustment">GtkAdjustment</a> *adjustment,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
>gdouble</a> value);</pre>
<p>
Sets the <a class="link" href="GtkAdjustment.html" title="GtkAdjustment"><span class="type">GtkAdjustment</span></a> value. The value is clamped to lie between
<code class="literal">adjustment-&gt;lower</code> and
<code class="literal">adjustment-&gt;upper</code>.
</p>
<p>
Note that for adjustments which are used in a <a class="link" href="GtkScrollbar.html" title="GtkScrollbar"><span class="type">GtkScrollbar</span></a>, the effective
range of allowed values goes from <code class="literal">adjustment-&gt;lower</code> to
<code class="literal">adjustment-&gt;upper - adjustment-&gt;page_size</code>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>adjustment</code></em>&#160;:</span></p></td>
<td>a <a class="link" href="GtkAdjustment.html" title="GtkAdjustment"><span class="type">GtkAdjustment</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em>&#160;:</span></p></td>
<td>the new value.


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id4207298"></a><h3>
<a name="gtk-adjustment-clamp-page"></a>gtk_adjustment_clamp_page ()</h3>
<a class="indexterm" name="id4207312"></a><pre class="programlisting">void                gtk_adjustment_clamp_page           (<a class="link" href="GtkAdjustment.html" title="GtkAdjustment">GtkAdjustment</a> *adjustment,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
>gdouble</a> lower,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"
>gdouble</a> upper);</pre>
<p>
Updates the <a class="link" href="GtkAdjustment.html" title="GtkAdjustment"><span class="type">GtkAdjustment</span></a> <em class="parameter"><code>value</code></em> to ensure that the range between <em class="parameter"><code>lower</code></em>
and <em class="parameter"><code>upper</code></em> is in the current page (i.e. between <em class="parameter"><code>value</code></em> and <em class="parameter"><code>value</code></em> +
<em class="parameter"><code>page_size</code></em>).
If the range is larger than the page size, then only the start of it will
be in the current page.
A "changed" signal will be emitted if the value is changed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>adjustment</code></em>&#160;:</span></p></td>
<td>a <a class="link" href="GtkAdjustment.html" title="GtkAdjustment"><span class="type">GtkAdjustment</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>lower</code></em>&#160;:</span></p></td>
<td>the lower value.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>upper</code></em>&#160;:</span></p></td>