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<li class="navelem"><a class="el" href="namespaceWt.html">Wt</a> </li>
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<a href="#pub-methods">Public Member Functions</a> |
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<div class="title">Wt::WModelIndex Class Reference<div class="ingroups"><a class="el" href="group__modelview.html">Model/view system</a></div></div> </div>
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<p>A value class that describes an index to an item in a data model.
<a href="classWt_1_1WModelIndex.html#details">More...</a></p>
<p><code>#include <Wt/WModelIndex></code></p>
<p><a href="classWt_1_1WModelIndex-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a29431c83f8ed71654e213ec4aae21813">WModelIndex</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Create an invalid <a class="el" href="classWt_1_1WModelIndex.html" title="A value class that describes an index to an item in a data model.">WModelIndex</a>. <a href="#a29431c83f8ed71654e213ec4aae21813"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a0e6568dd7113662c3c378e2084729581">column</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the column for this model index. <a href="#a0e6568dd7113662c3c378e2084729581"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#aa4f1385223391c46ee200a57672f6046">row</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the row for this model index. <a href="#aa4f1385223391c46ee200a57672f6046"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a44aabe692bba87ba144c1ab9a7f98eb3">internalPointer</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the internal pointer. <a href="#a44aabe692bba87ba144c1ab9a7f98eb3"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">::uint64_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a7ae49c4d0edaf9a520e6f5e8a62c3904">internalId</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the internal id. <a href="#a7ae49c4d0edaf9a520e6f5e8a62c3904"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a2c01a7ea6cbb423eec3f4d12f26324c7">child</a> (int row, int column) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns a model index for a child item. <a href="#a2c01a7ea6cbb423eec3f4d12f26324c7"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a0e6380caae0e785fdea9e30e0a95eec9">parent</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns an index to the parent. <a href="#a0e6380caae0e785fdea9e30e0a95eec9"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">boost::any </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a7f05920329ca4b7fdbb10931afdb634e">data</a> (int role=DisplayRole) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns data in the model at this index. <a href="#a7f05920329ca4b7fdbb10931afdb634e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">WFlags< <a class="el" href="group__modelview.html#ga1d77c4de293aebfacbdde124de06b8b0">ItemFlag</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a04877832f757772b8dc7e6b30fb3638c">flags</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the flags for this item. <a href="#a04877832f757772b8dc7e6b30fb3638c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a1d4b05ee51c5c6961d6123565fd77c82">isValid</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns whether the index is a real valid index. <a href="#a1d4b05ee51c5c6961d6123565fd77c82"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classWt_1_1WAbstractItemModel.html">WAbstractItemModel</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a9fe91b75030a8a7373e3262fbbc6cad6">model</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the model to which this (valid) index is bound. <a href="#a9fe91b75030a8a7373e3262fbbc6cad6"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a6bb6b3624c4d75e3a495860e46c04f9e">operator==</a> (const <a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> &other) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Comparison operator. <a href="#a6bb6b3624c4d75e3a495860e46c04f9e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#ace2743acada845b3d4912e70c9787eac">operator!=</a> (const <a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> &other) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Comparison operator. <a href="#ace2743acada845b3d4912e70c9787eac"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a29a0a0ab3e961b8087d95b7c62555cd1">operator<</a> (const <a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> &other) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Comparison operator. <a href="#a29a0a0ab3e961b8087d95b7c62555cd1"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a93c11e136a0fdc596eb745cc7fce7033">encodeAsRawIndex</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Encode to raw index (before a layout change). <a href="#a93c11e136a0fdc596eb745cc7fce7033"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a084da8a1b7f4de1f1c126aeb721425e9">decodeFromRawIndex</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Decodes a raw index (after a layout change). <a href="#a084da8a1b7f4de1f1c126aeb721425e9"></a><br/></td></tr>
<tr><td colspan="2"><h2><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a7626f089fcd0440dff3f91a4b3ecb04e">encodeAsRawIndexes</a> (WModelIndexSet &indexes)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Utility method for converting an entire set of indexes to raw. <a href="#a7626f089fcd0440dff3f91a4b3ecb04e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static WModelIndexSet </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#a14760130fe8b1abb354c6bba3d60f07b">decodeFromRawIndexes</a> (const WModelIndexSet &encodedIndexes)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Utility method to decode an entire set of raw indexes. <a href="#a14760130fe8b1abb354c6bba3d60f07b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="abe65ea47581a12a7db6caa9c0b2f8bec"></a><!-- doxytag: member="Wt::WModelIndex::isAncestor" ref="abe65ea47581a12a7db6caa9c0b2f8bec" args="(const Wt::WModelIndex &i1, const Wt::WModelIndex &i2)" -->
static bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WModelIndex.html#abe65ea47581a12a7db6caa9c0b2f8bec">isAncestor</a> (const <a class="el" href="classWt_1_1WModelIndex.html">Wt::WModelIndex</a> &i1, const <a class="el" href="classWt_1_1WModelIndex.html">Wt::WModelIndex</a> &i2)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns whether i2 is an ancestor of i1. <br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>A value class that describes an index to an item in a data model. </p>
<p>Indexes are used to indicate a particular item in a <a class="el" href="classWt_1_1WAbstractItemModel.html" title="An abstract model for use with Wt's view classes.">WAbstractItemModel</a>. An index points to the item by identifying its row and column location within a parent model index.</p>
<p>An index is immutable.</p>
<p>The default constructor creates an <em>invalid index</em>, which by convention indicates the parent of top level indexes. Thus, a model that specifies only a list or table of data (but no hierarchical data) would have as valid indexes only indexes that specify the <em>invalid</em> model index as parent.</p>
<p>Upon the model's choice, model indexes for hierarchical models may have an internal Id represented by a int64_t (<a class="el" href="classWt_1_1WModelIndex.html#a7ae49c4d0edaf9a520e6f5e8a62c3904" title="Returns the internal id.">internalId()</a>), a pointer (<a class="el" href="classWt_1_1WModelIndex.html#a44aabe692bba87ba144c1ab9a7f98eb3" title="Returns the internal pointer.">internalPointer()</a>).</p>
<p>Indexes are created by the model, within the protected <a class="el" href="classWt_1_1WAbstractItemModel.html#ac837a73fe423255035ffb076946de122" title="Creates a model index for the given row and column.">WAbstractItemModel::createIndex()</a> methods. In this way, models can define an internal pointer or id suitable for identifying parent items in the model.</p>
<p>When a model's geometry changes due to row or column insertions or removals, you may need to update your indexes, as otherwise they may no longer point to the same item (but instead still to the same row/column). Thus, if you store indexes and want to support model changes such as row or columns insertions/removals, then you need to react to the corresponding signals such as <a class="el" href="classWt_1_1WAbstractItemModel.html#a54c971088bb9b424f97fe31c17f8f12f" title="Signal emitted after a number of rows were inserted.">WAbstractItemModel::rowsInserted()</a> to update these indexes (i.e. shift them), or even remove them when the corresponding row/column has been removed.</p>
<p>When a model's layout changes (it is rearranging its contents for example in response to a sort operation), a similar problem arises. Some models support tracking of indexes over layout changes, using <em>raw</em> indexes. In reaction to <a class="el" href="classWt_1_1WAbstractItemModel.html#ab377ac2fcb9de9d191bd1353665d1389" title="Signal emitted when the layout is about to be changed.">WAbstractItemModel::layoutAboutToBeChanged()</a>, you should encode any index which you wish to recover after the layout change using <a class="el" href="classWt_1_1WModelIndex.html#a93c11e136a0fdc596eb745cc7fce7033" title="Encode to raw index (before a layout change).">encodeAsRawIndex()</a>, and in <a class="el" href="classWt_1_1WAbstractItemModel.html#afe7cb1d5186881f83aa8f0e452aaef66" title="Signal emitted when the layout is changed.">WAbstractItemModel::layoutChanged()</a> you can obtain an index that points to the same item using <a class="el" href="classWt_1_1WModelIndex.html#a084da8a1b7f4de1f1c126aeb721425e9" title="Decodes a raw index (after a layout change).">decodeFromRawIndex()</a>.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WAbstractItemModel.html" title="An abstract model for use with Wt's view classes.">WAbstractItemModel</a> </dd></dl>
</div><hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="a29431c83f8ed71654e213ec4aae21813"></a><!-- doxytag: member="Wt::WModelIndex::WModelIndex" ref="a29431c83f8ed71654e213ec4aae21813" args="()" -->
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<td class="memname">Wt::WModelIndex::WModelIndex </td>
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<p>Create an invalid <a class="el" href="classWt_1_1WModelIndex.html" title="A value class that describes an index to an item in a data model.">WModelIndex</a>. </p>
<p>Returns a model index for which <a class="el" href="classWt_1_1WModelIndex.html#a1d4b05ee51c5c6961d6123565fd77c82" title="Returns whether the index is a real valid index.">isValid()</a> return <code>false</code>. </p>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a2c01a7ea6cbb423eec3f4d12f26324c7"></a><!-- doxytag: member="Wt::WModelIndex::child" ref="a2c01a7ea6cbb423eec3f4d12f26324c7" args="(int row, int column) const " -->
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<td class="memname"><a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> Wt::WModelIndex::child </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>row</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>column</em> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td> const</td>
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<p>Returns a model index for a child item. </p>
<p>This is a convenience method, and is only defined for indexes that are valid().</p>
<p>It has the same function as <a class="el" href="classWt_1_1WAbstractItemModel.html#a83f37bf04b8574b328c139b02523b8cb" title="Returns the child index for the given row and column.">WAbstractItemModel::index()</a> but is less general because the latter expression may also be used to retrieve top level children, i.e. when <code>index</code> is invalid.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WAbstractItemModel.html#a83f37bf04b8574b328c139b02523b8cb" title="Returns the child index for the given row and column.">WAbstractItemModel::index()</a>, <a class="el" href="classWt_1_1WModelIndex.html#a1d4b05ee51c5c6961d6123565fd77c82" title="Returns whether the index is a real valid index.">isValid()</a> </dd></dl>
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<a class="anchor" id="a0e6568dd7113662c3c378e2084729581"></a><!-- doxytag: member="Wt::WModelIndex::column" ref="a0e6568dd7113662c3c378e2084729581" args="() const " -->
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<td class="memname">int Wt::WModelIndex::column </td>
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<td class="paramname"></td><td>)</td>
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<p>Returns the column for this model index. </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WModelIndex.html#aa4f1385223391c46ee200a57672f6046" title="Returns the row for this model index.">row()</a> </dd></dl>
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<a class="anchor" id="a7f05920329ca4b7fdbb10931afdb634e"></a><!-- doxytag: member="Wt::WModelIndex::data" ref="a7f05920329ca4b7fdbb10931afdb634e" args="(int role=DisplayRole) const " -->
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<td class="memname">boost::any Wt::WModelIndex::data </td>
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<td> const</td>
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<p>Returns data in the model at this index. </p>
<p>This is a convenience method for <a class="el" href="classWt_1_1WAbstractItemModel.html#a9112b74d160f916ef75fb6c1c09dd8fe" title="Returns data at a specific model index.">WAbstractItemModel::data()</a>.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WAbstractItemModel.html#a9112b74d160f916ef75fb6c1c09dd8fe" title="Returns data at a specific model index.">WAbstractItemModel::data()</a> </dd>
<dd>
<a class="el" href="group__modelview.html#ga0ae864e12320f9f89172735e075ed068" title="Enumeration that indicates a role for a data item.">ItemDataRole</a> </dd></dl>
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<a class="anchor" id="a084da8a1b7f4de1f1c126aeb721425e9"></a><!-- doxytag: member="Wt::WModelIndex::decodeFromRawIndex" ref="a084da8a1b7f4de1f1c126aeb721425e9" args="() const " -->
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<td class="memname"><a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> Wt::WModelIndex::decodeFromRawIndex </td>
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<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>Decodes a raw index (after a layout change). </p>
<p>A raw index can be decoded, within the context of a model that has been re-layed out.</p>
<p>This method returns a new index that points to the same item, or, <a class="el" href="classWt_1_1WModelIndex.html#a29431c83f8ed71654e213ec4aae21813" title="Create an invalid WModelIndex.">WModelIndex()</a> if the underlying model did not support encoding to raw indexes, or, if the item to which the index previously pointed, is no longer part of the model.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WAbstractItemModel.html#a85beaaea2e8609556543019618fd2a89" title="Converts a raw pointer to a model index.">WAbstractItemModel::fromRawIndex()</a>, <a class="el" href="classWt_1_1WAbstractItemModel.html#afe7cb1d5186881f83aa8f0e452aaef66" title="Signal emitted when the layout is changed.">WAbstractItemModel::layoutChanged()</a> </dd>
<dd>
<a class="el" href="classWt_1_1WModelIndex.html#a93c11e136a0fdc596eb745cc7fce7033" title="Encode to raw index (before a layout change).">encodeAsRawIndex()</a> </dd></dl>
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<a class="anchor" id="a14760130fe8b1abb354c6bba3d60f07b"></a><!-- doxytag: member="Wt::WModelIndex::decodeFromRawIndexes" ref="a14760130fe8b1abb354c6bba3d60f07b" args="(const WModelIndexSet &encodedIndexes)" -->
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<td class="memname">WModelIndexSet Wt::WModelIndex::decodeFromRawIndexes </td>
<td>(</td>
<td class="paramtype">const WModelIndexSet & </td>
<td class="paramname"><em>encodedIndexes</em></td><td>)</td>
<td><code> [static]</code></td>
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<p>Utility method to decode an entire set of raw indexes. </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WModelIndex.html#a084da8a1b7f4de1f1c126aeb721425e9" title="Decodes a raw index (after a layout change).">decodeFromRawIndex()</a> </dd></dl>
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<a class="anchor" id="a93c11e136a0fdc596eb745cc7fce7033"></a><!-- doxytag: member="Wt::WModelIndex::encodeAsRawIndex" ref="a93c11e136a0fdc596eb745cc7fce7033" args="()" -->
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<td class="memname">void Wt::WModelIndex::encodeAsRawIndex </td>
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<p>Encode to raw index (before a layout change). </p>
<p>Use this method to encode an index for which you want to recover an index after the layout change to the same item (which may still be in the model, but at a different location).</p>
<p>An index that has been encoded as a raw index cannot be used for anything but <a class="el" href="classWt_1_1WModelIndex.html#a084da8a1b7f4de1f1c126aeb721425e9" title="Decodes a raw index (after a layout change).">decodeFromRawIndex()</a> at a later point.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WAbstractItemModel.html#a5c4db8b3265c914f77efead35450f6dc" title="Converts a model index to a raw pointer that remains valid while the model's layout is changed...">WAbstractItemModel::toRawIndex()</a>, <a class="el" href="classWt_1_1WAbstractItemModel.html#ab377ac2fcb9de9d191bd1353665d1389" title="Signal emitted when the layout is about to be changed.">WAbstractItemModel::layoutAboutToBeChanged()</a> </dd>
<dd>
<a class="el" href="classWt_1_1WModelIndex.html#a084da8a1b7f4de1f1c126aeb721425e9" title="Decodes a raw index (after a layout change).">decodeFromRawIndex()</a> </dd></dl>
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<a class="anchor" id="a7626f089fcd0440dff3f91a4b3ecb04e"></a><!-- doxytag: member="Wt::WModelIndex::encodeAsRawIndexes" ref="a7626f089fcd0440dff3f91a4b3ecb04e" args="(WModelIndexSet &indexes)" -->
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<td class="memname">void Wt::WModelIndex::encodeAsRawIndexes </td>
<td>(</td>
<td class="paramtype">WModelIndexSet & </td>
<td class="paramname"><em>indexes</em></td><td>)</td>
<td><code> [static]</code></td>
</tr>
</table>
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<div class="memdoc">
<p>Utility method for converting an entire set of indexes to raw. </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WModelIndex.html#a93c11e136a0fdc596eb745cc7fce7033" title="Encode to raw index (before a layout change).">encodeAsRawIndex()</a> </dd></dl>
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<a class="anchor" id="a04877832f757772b8dc7e6b30fb3638c"></a><!-- doxytag: member="Wt::WModelIndex::flags" ref="a04877832f757772b8dc7e6b30fb3638c" args="() const " -->
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<td class="memname">WFlags< <a class="el" href="group__modelview.html#ga1d77c4de293aebfacbdde124de06b8b0">ItemFlag</a> > Wt::WModelIndex::flags </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>Returns the flags for this item. </p>
<p>This is a convenience method for <a class="el" href="classWt_1_1WAbstractItemModel.html#ab5e60f81be797c0553a010eff5b9a592" title="Returns the flags for an item.">WAbstractItemModel::flags()</a>.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WAbstractItemModel.html#ab5e60f81be797c0553a010eff5b9a592" title="Returns the flags for an item.">WAbstractItemModel::flags()</a> </dd>
<dd>
<a class="el" href="group__modelview.html#ga1d77c4de293aebfacbdde124de06b8b0" title="Flags that indicate data item options.">ItemFlag</a> </dd></dl>
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<a class="anchor" id="a7ae49c4d0edaf9a520e6f5e8a62c3904"></a><!-- doxytag: member="Wt::WModelIndex::internalId" ref="a7ae49c4d0edaf9a520e6f5e8a62c3904" args="() const " -->
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<td class="memname">::uint64_t Wt::WModelIndex::internalId </td>
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<p>Returns the internal id. </p>
<p>The internal id is used by the model to retrieve the corresponding data.</p>
<p>This is only defined when the model created the index using WAbstractItemModel::createIndex(int, int, uint64_t) const.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WModelIndex.html#a44aabe692bba87ba144c1ab9a7f98eb3" title="Returns the internal pointer.">internalPointer()</a> </dd>
<dd>
WAbstractItemModel::createIndex(int, int, uint64_t) const </dd></dl>
</div>
</div>
<a class="anchor" id="a44aabe692bba87ba144c1ab9a7f98eb3"></a><!-- doxytag: member="Wt::WModelIndex::internalPointer" ref="a44aabe692bba87ba144c1ab9a7f98eb3" args="() const " -->
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<td class="memname">void* Wt::WModelIndex::internalPointer </td>
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<td class="paramname"></td><td>)</td>
<td> const</td>
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<div class="memdoc">
<p>Returns the internal pointer. </p>
<p>The internal pointer is used by the model to retrieve the corresponding data.</p>
<p>This is only defined when the model created the index using <a class="el" href="classWt_1_1WAbstractItemModel.html#ac837a73fe423255035ffb076946de122" title="Creates a model index for the given row and column.">WAbstractItemModel::createIndex(int, int, void *) const</a>.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WModelIndex.html#a7ae49c4d0edaf9a520e6f5e8a62c3904" title="Returns the internal id.">internalId()</a>, </dd>
<dd>
<a class="el" href="classWt_1_1WAbstractItemModel.html#ac837a73fe423255035ffb076946de122" title="Creates a model index for the given row and column.">WAbstractItemModel::createIndex(int, int, void *) const</a> </dd></dl>
</div>
</div>
<a class="anchor" id="a1d4b05ee51c5c6961d6123565fd77c82"></a><!-- doxytag: member="Wt::WModelIndex::isValid" ref="a1d4b05ee51c5c6961d6123565fd77c82" args="() const " -->
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<td class="memname">bool Wt::WModelIndex::isValid </td>
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<p>Returns whether the index is a real valid index. </p>
<p>Returns <code>true</code> when the index points to a valid data item, i.e. at a valid <a class="el" href="classWt_1_1WModelIndex.html#aa4f1385223391c46ee200a57672f6046" title="Returns the row for this model index.">row()</a> and <a class="el" href="classWt_1_1WModelIndex.html#a0e6568dd7113662c3c378e2084729581" title="Returns the column for this model index.">column()</a>.</p>
<p>An index may be invalid for two reasons:</p>
<ul>
<li>an operation requested an index that was out of model bounds,</li>
<li>or, the index corresponds to the model's top level root item, and is thus the parent index for top level items. </li>
</ul>
</div>
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<a class="anchor" id="a9fe91b75030a8a7373e3262fbbc6cad6"></a><!-- doxytag: member="Wt::WModelIndex::model" ref="a9fe91b75030a8a7373e3262fbbc6cad6" args="() const " -->
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<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>Returns the model to which this (valid) index is bound. </p>
<p>This returns the model that created the model index. </p>
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<a class="anchor" id="ace2743acada845b3d4912e70c9787eac"></a><!-- doxytag: member="Wt::WModelIndex::operator!=" ref="ace2743acada845b3d4912e70c9787eac" args="(const WModelIndex &other) const " -->
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<td class="memname">bool Wt::WModelIndex::operator!= </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> & </td>
<td class="paramname"><em>other</em></td><td>)</td>
<td> const</td>
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<p>Comparison operator. </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WModelIndex.html#a6bb6b3624c4d75e3a495860e46c04f9e" title="Comparison operator.">operator==()</a> </dd></dl>
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<a class="anchor" id="a29a0a0ab3e961b8087d95b7c62555cd1"></a><!-- doxytag: member="Wt::WModelIndex::operator<" ref="a29a0a0ab3e961b8087d95b7c62555cd1" args="(const WModelIndex &other) const " -->
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<td class="memname">bool Wt::WModelIndex::operator< </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> & </td>
<td class="paramname"><em>other</em></td><td>)</td>
<td> const</td>
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<p>Comparison operator. </p>
<p>Returns <code>true</code> if the index comes topologically before <code>other</code>.</p>
<p>Topological order follows the order in which the indexes would be displayed in a tree table view, from top to bottom followed by left to right. </p>
</div>
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<a class="anchor" id="a6bb6b3624c4d75e3a495860e46c04f9e"></a><!-- doxytag: member="Wt::WModelIndex::operator==" ref="a6bb6b3624c4d75e3a495860e46c04f9e" args="(const WModelIndex &other) const " -->
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<td class="memname">bool Wt::WModelIndex::operator== </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> & </td>
<td class="paramname"><em>other</em></td><td>)</td>
<td> const</td>
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<p>Comparison operator. </p>
<p>Returns <code>true</code> only if the indexes point at the same data, in the same model. </p>
</div>
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<a class="anchor" id="a0e6380caae0e785fdea9e30e0a95eec9"></a><!-- doxytag: member="Wt::WModelIndex::parent" ref="a0e6380caae0e785fdea9e30e0a95eec9" args="() const " -->
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<td class="memname"><a class="el" href="classWt_1_1WModelIndex.html">WModelIndex</a> Wt::WModelIndex::parent </td>
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<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>Returns an index to the parent. </p>
<p>This is a convenience method for <a class="el" href="classWt_1_1WAbstractItemModel.html#ada454d45706ca0c1a0921dedd351c48c" title="Returns the parent for a model index.">WAbstractItemModel::parent()</a>.</p>
<p>For a top level data item, the <a class="el" href="classWt_1_1WModelIndex.html#a0e6380caae0e785fdea9e30e0a95eec9" title="Returns an index to the parent.">parent()</a> is an invalid index (see <a class="el" href="classWt_1_1WModelIndex.html#a29431c83f8ed71654e213ec4aae21813" title="Create an invalid WModelIndex.">WModelIndex()</a>).</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WAbstractItemModel.html#ada454d45706ca0c1a0921dedd351c48c" title="Returns the parent for a model index.">WAbstractItemModel::parent()</a> </dd></dl>
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<a class="anchor" id="aa4f1385223391c46ee200a57672f6046"></a><!-- doxytag: member="Wt::WModelIndex::row" ref="aa4f1385223391c46ee200a57672f6046" args="() const " -->
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<td class="memname">int Wt::WModelIndex::row </td>
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<td> const</td>
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<p>Returns the row for this model index. </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WModelIndex.html#a0e6568dd7113662c3c378e2084729581" title="Returns the column for this model index.">column()</a> </dd></dl>
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