classogrlayer.html

gdal库的学习文档

<a class="anchor" name="ebb07284c734e485d8611b7c8599254f"></a><!-- doxytag: member="OGRLayer::SyncToDisk" ref="ebb07284c734e485d8611b7c8599254f" args="()" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">OGRErr OGRLayer::SyncToDisk           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"><code> [virtual]</code></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Flush pending changes to disk.<p>
This call is intended to force the layer to flush any pending writes to disk, and leave the disk file in a consistent state. It would not normally have any effect on read-only datasources.<p>
Some layers do not implement this method, and will still return OGRERR_NONE. The default implementation just returns OGRERR_NONE. An error is only returned if an error occurs while attempting to flush to disk.<p>
This method is the same as the C function OGR_L_SyncToDisk().<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>OGRERR_NONE if no error occurs (even if nothing is done) or an error code. </dd></dl>

</div>
</div><p>
<a class="anchor" name="265ddcd701c1d29cb959aae97dda1af4"></a><!-- doxytag: member="OGRLayer::GetStyleTable" ref="265ddcd701c1d29cb959aae97dda1af4" args="()" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void OGRLayer::GetStyleTable           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"><code> [inline]</code></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Returns layer style table.<p>
This method is the same as the C function OGR_L_GetStyleTable().<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>pointer to a style table which should not be modified or freed by the caller. </dd></dl>

</div>
</div><p>
<a class="anchor" name="2687d4312c044bb3a20bd13974ba8905"></a><!-- doxytag: member="OGRLayer::SetStyleTableDirectly" ref="2687d4312c044bb3a20bd13974ba8905" args="(OGRStyleTable *poStyleTable)" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void OGRLayer::SetStyleTableDirectly           </td>
          <td>(</td>
          <td class="paramtype">OGRStyleTable *&nbsp;</td>
          <td class="paramname"> <em>poStyleTable</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"><code> [inline]</code></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Set layer style table.<p>
This method operate exactly as <a class="el" href="classOGRLayer.html#33fa0802c0686fb0e6ca6337e11cd7d5">OGRLayer::SetStyleTable()</a> except that it assumes ownership of the passed table.<p>
This method is the same as the C function OGR_L_SetStyleTableDirectly().<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>poStyleTable</em>&nbsp;</td><td>pointer to style table to set </td></tr>
  </table>
</dl>

</div>
</div><p>
<a class="anchor" name="33fa0802c0686fb0e6ca6337e11cd7d5"></a><!-- doxytag: member="OGRLayer::SetStyleTable" ref="33fa0802c0686fb0e6ca6337e11cd7d5" args="(OGRStyleTable *poStyleTable)" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void OGRLayer::SetStyleTable           </td>
          <td>(</td>
          <td class="paramtype">OGRStyleTable *&nbsp;</td>
          <td class="paramname"> <em>poStyleTable</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"><code> [inline]</code></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Set layer style table.<p>
This method operate exactly as <a class="el" href="classOGRLayer.html#2687d4312c044bb3a20bd13974ba8905">OGRLayer::SetStyleTableDirectly()</a> except that it does not assume ownership of the passed table.<p>
This method is the same as the C function OGR_L_SetStyleTable().<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>poStyleTable</em>&nbsp;</td><td>pointer to style table to set </td></tr>
  </table>
</dl>

</div>
</div><p>
<a class="anchor" name="f0cb9a05310d7b17d9dfec9e83a18e61"></a><!-- doxytag: member="OGRLayer::GetFIDColumn" ref="f0cb9a05310d7b17d9dfec9e83a18e61" args="()" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">const char * OGRLayer::GetFIDColumn           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"><code> [virtual]</code></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
This method returns the name of the underlying database column being used as the FID column, or "" if not supported.<p>
This method is the same as the C function OGR_L_GetFIDColumn().<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>fid column name. </dd></dl>

</div>
</div><p>
<a class="anchor" name="f68036c23622c954ce3a91861f22b724"></a><!-- doxytag: member="OGRLayer::GetGeometryColumn" ref="f68036c23622c954ce3a91861f22b724" args="()" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">const char * OGRLayer::GetGeometryColumn           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"><code> [virtual]</code></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
This method returns the name of the underlying database column being used as the geometry column, or "" if not supported.<p>
This method is the same as the C function OGR_L_GetFIDColumn().<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>fid column name. </dd></dl>

</div>
</div><p>
<a class="anchor" name="e783de2e9ee2629e6bf27fd3b8622fb5"></a><!-- doxytag: member="OGRLayer::Reference" ref="e783de2e9ee2629e6bf27fd3b8622fb5" args="()" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int OGRLayer::Reference           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Increment layer reference count.<p>
This method is the same as the C function OGR_L_Reference().<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the reference count after incrementing. </dd></dl>

</div>
</div><p>
<a class="anchor" name="2271d53f75d4f6ff2f4a8aeb71e825d6"></a><!-- doxytag: member="OGRLayer::Dereference" ref="2271d53f75d4f6ff2f4a8aeb71e825d6" args="()" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int OGRLayer::Dereference           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Decrement layer reference count.<p>
This method is the same as the C function OGR_L_Dereference().<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the reference count after decrementing. </dd></dl>

</div>
</div><p>
<a class="anchor" name="df3cea24856572302ae11ed97ca33375"></a><!-- doxytag: member="OGRLayer::GetRefCount" ref="df3cea24856572302ae11ed97ca33375" args="() const" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int OGRLayer::GetRefCount           </td>
          <td>(</td>
          <td class="paramname">          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"> const</td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Fetch reference count.<p>
This method is the same as the C function OGR_L_GetRefCount().<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the current reference count for the layer object itself. </dd></dl>

</div>
</div><p>
<hr>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="ogrsf__frmts_8h-source.html">ogrsf_frmts.h</a><li>ogrsf_frmts.dox<li>ogrlayer.cpp</ul>
<hr>

Generated for GDAL by 
<a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.1.
</body>
</html>