classogrfielddefn.html

gdal库的学习文档

  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>eType</em>&nbsp;</td><td>the field type to get name for.</td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>pointer to an internal static name string. It should not be modified or freed. </dd></dl>

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<a class="anchor" name="40f6520b0638571f8acf32b2c436231f"></a><!-- doxytag: member="OGRFieldDefn::GetJustify" ref="40f6520b0638571f8acf32b2c436231f" args="()" -->
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          <td class="memname">OGRJustification OGRFieldDefn::GetJustify           </td>
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<p>
Get the justification for this field.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#0cf8a09826e47763e6bf667af0dae1a7">OGR_Fld_GetJustify()</a>.<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the justification. </dd></dl>

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<a class="anchor" name="cbd783e3b61ab388eab3f45c25cf1bc0"></a><!-- doxytag: member="OGRFieldDefn::SetJustify" ref="cbd783e3b61ab388eab3f45c25cf1bc0" args="(OGRJustification eJustifyIn)" -->
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          <td class="memname">void OGRFieldDefn::SetJustify           </td>
          <td>(</td>
          <td class="paramtype">OGRJustification&nbsp;</td>
          <td class="paramname"> <em>eJustify</em>          </td>
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<p>
Set the justification for this field.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#e4809f2fe957002b8e18aacc1bdca240">OGR_Fld_SetJustify()</a>.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>eJustify</em>&nbsp;</td><td>the new justification. </td></tr>
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</dl>

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<a class="anchor" name="3aca8d59291beed0ccfe2e05a187bcb1"></a><!-- doxytag: member="OGRFieldDefn::GetWidth" ref="3aca8d59291beed0ccfe2e05a187bcb1" args="()" -->
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          <td class="memname">int OGRFieldDefn::GetWidth           </td>
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<p>
Get the formatting width for this field.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#a6500186e3f22761a615428c55bba0ce">OGR_Fld_GetWidth()</a>.<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the width, zero means no specified width. </dd></dl>

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<a class="anchor" name="a793194c45ccba5ec7e9f7aea49dc6f3"></a><!-- doxytag: member="OGRFieldDefn::SetWidth" ref="a793194c45ccba5ec7e9f7aea49dc6f3" args="(int nWidthIn)" -->
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          <td class="memname">void OGRFieldDefn::SetWidth           </td>
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          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>nWidth</em>          </td>
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Set the formatting width for this field in characters.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#1d7bf7c14a299448efac58f7bf364326">OGR_Fld_SetWidth()</a>.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>nWidth</em>&nbsp;</td><td>the new width. </td></tr>
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</dl>

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<a class="anchor" name="704a3aa995e9ee44b369aff7f1e065a5"></a><!-- doxytag: member="OGRFieldDefn::GetPrecision" ref="704a3aa995e9ee44b369aff7f1e065a5" args="()" -->
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          <td class="memname">int OGRFieldDefn::GetPrecision           </td>
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<p>
Get the formatting precision for this field. This should normally be zero for fields of types other than OFTReal.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#120dd56ee23070922e4d84ed06b06e27">OGR_Fld_GetPrecision()</a>.<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>the precision. </dd></dl>

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<a class="anchor" name="bea88d3ed96c46b4f0eda415460f8664"></a><!-- doxytag: member="OGRFieldDefn::SetPrecision" ref="bea88d3ed96c46b4f0eda415460f8664" args="(int nPrecisionIn)" -->
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          <td class="memname">void OGRFieldDefn::SetPrecision           </td>
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          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>nPrecision</em>          </td>
          <td>&nbsp;)&nbsp;</td>
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<p>
Set the formatting precision for this field in characters.<p>
This should normally be zero for fields of types other than OFTReal.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#13890f01f7d7e57bcd07e23f3e2947da">OGR_Fld_SetPrecision()</a>.<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>nPrecision</em>&nbsp;</td><td>the new precision. </td></tr>
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</dl>

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<a class="anchor" name="9b08b348f111ecbfe2970b312d9ce54b"></a><!-- doxytag: member="OGRFieldDefn::Set" ref="9b08b348f111ecbfe2970b312d9ce54b" args="(const char *, OGRFieldType, int=0, int=0, OGRJustification=OJUndefined)" -->
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          <td class="memname">void OGRFieldDefn::Set           </td>
          <td>(</td>
          <td class="paramtype">const char *&nbsp;</td>
          <td class="paramname"> <em>pszNameIn</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">OGRFieldType&nbsp;</td>
          <td class="paramname"> <em>eTypeIn</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>nWidthIn</em> = <code>0</code>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int&nbsp;</td>
          <td class="paramname"> <em>nPrecisionIn</em> = <code>0</code>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">OGRJustification&nbsp;</td>
          <td class="paramname"> <em>eJustifyIn</em> = <code>OJUndefined</code></td><td>&nbsp;</td>
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          <td>)</td>
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<p>
Set defining parameters for a field in one call.<p>
This method is the same as the C function <a class="el" href="ogr__api_8h.html#5922e599fe8746b81adf251be6b5ecf0">OGR_Fld_Set()</a>.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>pszNameIn</em>&nbsp;</td><td>the new name to assign. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>eTypeIn</em>&nbsp;</td><td>the new type (one of the OFT values like OFTInteger). </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>nWidthIn</em>&nbsp;</td><td>the preferred formatting width. Defaults to zero indicating undefined. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>nPrecisionIn</em>&nbsp;</td><td>number of decimals places for formatting, defaults to zero indicating undefined. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>eJustifyIn</em>&nbsp;</td><td>the formatting justification (OJLeft or OJRight), defaults to OJUndefined. </td></tr>
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<a class="anchor" name="1e8863611c93c09bd5d922e1b859670d"></a><!-- doxytag: member="OGRFieldDefn::SetDefault" ref="1e8863611c93c09bd5d922e1b859670d" args="(const OGRField *)" -->
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          <td class="memname">void OGRFieldDefn::SetDefault           </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="unionOGRField.html">OGRField</a> *&nbsp;</td>
          <td class="paramname"> <em>puDefaultIn</em>          </td>
          <td>&nbsp;)&nbsp;</td>
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<p>
Set default field value.<p>
Currently use of <a class="el" href="classOGRFieldDefn.html">OGRFieldDefn</a> "defaults" is discouraged. This feature may be fleshed out in the future. 
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<hr>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="ogr__feature_8h-source.html">ogr_feature.h</a><li>ogrfielddefn.cpp</ul>
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