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<meta name="author" content="Emanuel Eichhammer" />
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<title>QCPAbstractItem Class Reference</title>
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<a href="#pub-methods">Public Functions</a> |
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<a href="#pro-methods">Protected Functions</a> </div>
<div class="headertitle">
<div class="title">QCPAbstractItem Class Reference<span class="mlabels"><span class="mlabel">abstract</span></span></div> </div>
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<div class="contents">
<p>The abstract base class for all items in a plot.
<a href="classQCPAbstractItem.html#details">More...</a></p>
<div class="dynheader">
Inheritance diagram for QCPAbstractItem:</div>
<div class="dyncontent">
<div class="center"><img src="classQCPAbstractItem__inherit__graph.png" border="0" usemap="#QCPAbstractItem_inherit__map" alt="Inheritance graph"/></div>
<map name="QCPAbstractItem_inherit__map" id="QCPAbstractItem_inherit__map">
<area shape="rect" id="node3" href="classQCPItemBracket.html" title="A bracket for referencing/highlighting certain parts in the plot. " alt="" coords="332,5,447,29"/><area shape="rect" id="node4" href="classQCPItemCurve.html" title="A curved line from one point to another. " alt="" coords="337,53,441,77"/><area shape="rect" id="node5" href="classQCPItemEllipse.html" title="An ellipse. " alt="" coords="335,101,443,125"/><area shape="rect" id="node6" href="classQCPItemLine.html" title="A line from one point to another. " alt="" coords="342,149,437,173"/><area shape="rect" id="node7" href="classQCPItemPixmap.html" title="An arbitrary pixmap. " alt="" coords="333,197,445,221"/><area shape="rect" id="node8" href="classQCPItemRect.html" title="A rectangle. " alt="" coords="342,245,437,269"/><area shape="rect" id="node9" href="classQCPItemStraightLine.html" title="A straight line that spans infinitely in both directions. " alt="" coords="320,293,459,317"/><area shape="rect" id="node10" href="classQCPItemText.html" title="A text label. " alt="" coords="343,341,436,365"/><area shape="rect" id="node11" href="classQCPItemTracer.html" title="Item that sticks to QCPGraph data points. " alt="" coords="336,389,443,413"/><area shape="rect" id="node2" href="classQCPLayerable.html" title="Base class for all drawable objects. " alt="" coords="5,197,107,221"/></map>
</div>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Functions</h2></td></tr>
<tr class="memitem:a9922507d8b4503a1fe1ed0b1030e23b6"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a9922507d8b4503a1fe1ed0b1030e23b6">QCPAbstractItem</a> (<a class="el" href="classQCustomPlot.html">QCustomPlot</a> *parentPlot)</td></tr>
<tr class="separator:a9922507d8b4503a1fe1ed0b1030e23b6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5b0ea171823033bcb8aee81f4a034871"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a5b0ea171823033bcb8aee81f4a034871"></a>
bool </td><td class="memItemRight" valign="bottom"><b>clipToAxisRect</b> () const </td></tr>
<tr class="separator:a5b0ea171823033bcb8aee81f4a034871"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a37f86618740b5047eae23eedb2de061a"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a37f86618740b5047eae23eedb2de061a"></a>
<a class="el" href="classQCPAxisRect.html">QCPAxisRect</a> * </td><td class="memItemRight" valign="bottom"><b>clipAxisRect</b> () const </td></tr>
<tr class="separator:a37f86618740b5047eae23eedb2de061a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a9189e752025533e1595eaade0009a3bc"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a9189e752025533e1595eaade0009a3bc"></a>
bool </td><td class="memItemRight" valign="bottom"><b>selectable</b> () const </td></tr>
<tr class="separator:a9189e752025533e1595eaade0009a3bc"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a225865808640d8d9a7dd19f09a2e93f2"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a225865808640d8d9a7dd19f09a2e93f2"></a>
bool </td><td class="memItemRight" valign="bottom"><b>selected</b> () const </td></tr>
<tr class="separator:a225865808640d8d9a7dd19f09a2e93f2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a39e05b9d4176b9accafc746d16ca6a06"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a39e05b9d4176b9accafc746d16ca6a06">setClipToAxisRect</a> (bool clip)</td></tr>
<tr class="separator:a39e05b9d4176b9accafc746d16ca6a06"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7dc75fcbcd10206fe0b75d757ea7a347"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a7dc75fcbcd10206fe0b75d757ea7a347">setClipAxisRect</a> (<a class="el" href="classQCPAxisRect.html">QCPAxisRect</a> *rect)</td></tr>
<tr class="separator:a7dc75fcbcd10206fe0b75d757ea7a347"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a8a8e32a55bc478b849756a78c2d87fd2"><td class="memItemLeft" align="right" valign="top">Q_SLOT void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a8a8e32a55bc478b849756a78c2d87fd2">setSelectable</a> (bool selectable)</td></tr>
<tr class="separator:a8a8e32a55bc478b849756a78c2d87fd2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a203de94ad586cc44d16c9565f49d3378"><td class="memItemLeft" align="right" valign="top">Q_SLOT void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a203de94ad586cc44d16c9565f49d3378">setSelected</a> (bool selected)</td></tr>
<tr class="separator:a203de94ad586cc44d16c9565f49d3378"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a96d522d10ffc0413b9a366c6f7f0476b"><td class="memItemLeft" align="right" valign="top">virtual double </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a> (const QPointF &pos, bool onlySelectable, QVariant *details=0) const =0</td></tr>
<tr class="separator:a96d522d10ffc0413b9a366c6f7f0476b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:adf6a680cc29a6bce8345c3b6af3a91a1"><td class="memItemLeft" align="right" valign="top">QList< <a class="el" href="classQCPItemPosition.html">QCPItemPosition</a> * > </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#adf6a680cc29a6bce8345c3b6af3a91a1">positions</a> () const </td></tr>
<tr class="separator:adf6a680cc29a6bce8345c3b6af3a91a1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a8454b9941960b840608a5a1e00b1977d"><td class="memItemLeft" align="right" valign="top">QList< <a class="el" href="classQCPItemAnchor.html">QCPItemAnchor</a> * > </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a8454b9941960b840608a5a1e00b1977d">anchors</a> () const </td></tr>
<tr class="separator:a8454b9941960b840608a5a1e00b1977d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af71345bd150f87fa1d2442837b87bb59"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classQCPItemPosition.html">QCPItemPosition</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#af71345bd150f87fa1d2442837b87bb59">position</a> (const QString &name) const </td></tr>
<tr class="separator:af71345bd150f87fa1d2442837b87bb59"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:abed974cba7cc02608c71dad4638e008d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classQCPItemAnchor.html">QCPItemAnchor</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#abed974cba7cc02608c71dad4638e008d">anchor</a> (const QString &name) const </td></tr>
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<tr class="memitem:acbce9e5ba5252541d19db0c40303357a"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#acbce9e5ba5252541d19db0c40303357a">hasAnchor</a> (const QString &name) const </td></tr>
<tr class="separator:acbce9e5ba5252541d19db0c40303357a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_classQCPLayerable"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classQCPLayerable')"><img src="closed.png" alt="-"/> Public Functions inherited from <a class="el" href="classQCPLayerable.html">QCPLayerable</a></td></tr>
<tr class="memitem:a74c0fa237f29bf0e49565013fc5d1ec0 inherit pub_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#a74c0fa237f29bf0e49565013fc5d1ec0">QCPLayerable</a> (<a class="el" href="classQCustomPlot.html">QCustomPlot</a> *plot, QString targetLayer=QString(), <a class="el" href="classQCPLayerable.html">QCPLayerable</a> *<a class="el" href="classQCPLayerable.html#a98d79f5b716d45eac4347befe546d0ec">parentLayerable</a>=0)</td></tr>
<tr class="separator:a74c0fa237f29bf0e49565013fc5d1ec0 inherit pub_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a10a3cc92e0fa63e4a929e61d34e275a7 inherit pub_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a10a3cc92e0fa63e4a929e61d34e275a7"></a>
bool </td><td class="memItemRight" valign="bottom"><b>visible</b> () const </td></tr>
<tr class="separator:a10a3cc92e0fa63e4a929e61d34e275a7 inherit pub_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab7e0e94461566093d36ffc0f5312b109 inherit pub_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab7e0e94461566093d36ffc0f5312b109"></a>
<a class="el" href="classQCustomPlot.html">QCustomPlot</a> * </td><td class="memItemRight" valign="bottom"><b>parentPlot</b> () const </td></tr>
<tr class="separator:ab7e0e94461566093d36ffc0f5312b109 inherit pub_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a98d79f5b716d45eac4347befe546d0ec inherit pub_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classQCPLayerable.html">QCPLayerable</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#a98d79f5b716d45eac4347befe546d0ec">parentLayerable</a> () const </td></tr>
<tr class="separator:a98d79f5b716d45eac4347befe546d0ec inherit pub_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aea67e8c19145e70d68c286a36f6b8300 inherit pub_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aea67e8c19145e70d68c286a36f6b8300"></a>
<a class="el" href="classQCPLayer.html">QCPLayer</a> * </td><td class="memItemRight" valign="bottom"><b>layer</b> () const </td></tr>
<tr class="separator:aea67e8c19145e70d68c286a36f6b8300 inherit pub_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aef5cb4aa899ed9dc9384fd614560291e inherit pub_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aef5cb4aa899ed9dc9384fd614560291e"></a>
bool </td><td class="memItemRight" valign="bottom"><b>antialiased</b> () const </td></tr>
<tr class="separator:aef5cb4aa899ed9dc9384fd614560291e inherit pub_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a3bed99ddc396b48ce3ebfdc0418744f8 inherit pub_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#a3bed99ddc396b48ce3ebfdc0418744f8">setVisible</a> (bool on)</td></tr>
<tr class="separator:a3bed99ddc396b48ce3ebfdc0418744f8 inherit pub_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab0d0da6d2de45a118886d2c8e16d5a54 inherit pub_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top">Q_SLOT bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#ab0d0da6d2de45a118886d2c8e16d5a54">setLayer</a> (<a class="el" href="classQCPLayer.html">QCPLayer</a> *layer)</td></tr>
<tr class="separator:ab0d0da6d2de45a118886d2c8e16d5a54 inherit pub_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab25a0e7b897993b44447caee0f142083 inherit pub_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#ab25a0e7b897993b44447caee0f142083">setLayer</a> (const QString &layerName)</td></tr>
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<tr class="memitem:a4fd43e89be4a553ead41652565ff0581 inherit pub_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#a4fd43e89be4a553ead41652565ff0581">setAntialiased</a> (bool enabled)</td></tr>
<tr class="separator:a4fd43e89be4a553ead41652565ff0581 inherit pub_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a30809f7455e9794bca7b6c737622fa63 inherit pub_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#a30809f7455e9794bca7b6c737622fa63">realVisibility</a> () const </td></tr>
<tr class="separator:a30809f7455e9794bca7b6c737622fa63 inherit pub_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="signals"></a>
Signals</h2></td></tr>
<tr class="memitem:aa5cffb034fc65dbb91c77e02c1c14251"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#aa5cffb034fc65dbb91c77e02c1c14251">selectionChanged</a> (bool selected)</td></tr>
<tr class="separator:aa5cffb034fc65dbb91c77e02c1c14251"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5b266c11aac61cb511901f3911dac2a3"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a5b266c11aac61cb511901f3911dac2a3"></a>
void </td><td class="memItemRight" valign="bottom"><b>selectableChanged</b> (bool selectable)</td></tr>
<tr class="separator:a5b266c11aac61cb511901f3911dac2a3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header signals_classQCPLayerable"><td colspan="2" onclick="javascript:toggleInherit('signals_classQCPLayerable')"><img src="closed.png" alt="-"/> Signals inherited from <a class="el" href="classQCPLayerable.html">QCPLayerable</a></td></tr>
<tr class="memitem:abbf8657cedea73ac1c3499b521c90eba inherit signals_classQCPLayerable"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#abbf8657cedea73ac1c3499b521c90eba">layerChanged</a> (<a class="el" href="classQCPLayer.html">QCPLayer</a> *newLayer)</td></tr>
<tr class="separator:abbf8657cedea73ac1c3499b521c90eba inherit signals_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-methods"></a>
Protected Functions</h2></td></tr>
<tr class="memitem:a777b5d384936396ad9c3ceb3d3453f1c"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="namespaceQCP.html#a2ad6bb6281c7c2d593d4277b44c2b037">QCP::Interaction</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a777b5d384936396ad9c3ceb3d3453f1c">selectionCategory</a> () const </td></tr>
<tr class="separator:a777b5d384936396ad9c3ceb3d3453f1c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a538e25ff8856534582f5b2b400a46405"><td class="memItemLeft" align="right" valign="top">virtual QRect </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a538e25ff8856534582f5b2b400a46405">clipRect</a> () const </td></tr>
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<tr class="memitem:a0839031abdd71067e2256a4d53c7a011"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a0839031abdd71067e2256a4d53c7a011">applyDefaultAntialiasingHint</a> (<a class="el" href="classQCPPainter.html">QCPPainter</a> *painter) const </td></tr>
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<tr class="memitem:ad0dc056f650c3ca73414e6b4f01674ef"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#ad0dc056f650c3ca73414e6b4f01674ef">draw</a> (<a class="el" href="classQCPPainter.html">QCPPainter</a> *painter)=0</td></tr>
<tr class="separator:ad0dc056f650c3ca73414e6b4f01674ef"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aaf92af7b9893712959a6c073d334d88d"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#aaf92af7b9893712959a6c073d334d88d">selectEvent</a> (QMouseEvent *event, bool additive, const QVariant &details, bool *selectionStateChanged)</td></tr>
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<tr class="memitem:a91f090d6763cfedb0749219c63788ae9"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a91f090d6763cfedb0749219c63788ae9">deselectEvent</a> (bool *selectionStateChanged)</td></tr>
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<tr class="memitem:a94bde62b8a2fc133666dcbb8035deeed"><td class="memItemLeft" align="right" valign="top">virtual QPointF </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a94bde62b8a2fc133666dcbb8035deeed">anchorPixelPoint</a> (int anchorId) const </td></tr>
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<tr class="memitem:acdca343717d625b8abb3c3e38c0ed39d"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#acdca343717d625b8abb3c3e38c0ed39d">distSqrToLine</a> (const QPointF &start, const QPointF &end, const QPointF &point) const </td></tr>
<tr class="separator:acdca343717d625b8abb3c3e38c0ed39d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a4c0e14c4e92df91174cb7183fb363069"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a4c0e14c4e92df91174cb7183fb363069">rectSelectTest</a> (const QRectF &rect, const QPointF &pos, bool filledRect) const </td></tr>
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<tr class="memitem:a75036d39c4d4e2e1a7dd145fff915d32"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classQCPItemPosition.html">QCPItemPosition</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#a75036d39c4d4e2e1a7dd145fff915d32">createPosition</a> (const QString &name)</td></tr>
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<tr class="memitem:af3fc92527802078ca395138748b629a7"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classQCPItemAnchor.html">QCPItemAnchor</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPAbstractItem.html#af3fc92527802078ca395138748b629a7">createAnchor</a> (const QString &name, int anchorId)</td></tr>
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<tr class="inherit_header pro_methods_classQCPLayerable"><td colspan="2" onclick="javascript:toggleInherit('pro_methods_classQCPLayerable')"><img src="closed.png" alt="-"/> Protected Functions inherited from <a class="el" href="classQCPLayerable.html">QCPLayerable</a></td></tr>
<tr class="memitem:ab20b7dbd8e0249ed61adb9622c427382 inherit pro_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#ab20b7dbd8e0249ed61adb9622c427382">parentPlotInitialized</a> (<a class="el" href="classQCustomPlot.html">QCustomPlot</a> *parentPlot)</td></tr>
<tr class="separator:ab20b7dbd8e0249ed61adb9622c427382 inherit pro_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a8cbe5a0c9a5674249982f5ca5f8e02bc inherit pro_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#a8cbe5a0c9a5674249982f5ca5f8e02bc">initializeParentPlot</a> (<a class="el" href="classQCustomPlot.html">QCustomPlot</a> *parentPlot)</td></tr>
<tr class="separator:a8cbe5a0c9a5674249982f5ca5f8e02bc inherit pro_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa23c893671f1f6744ac235cf2204cf3a inherit pro_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#aa23c893671f1f6744ac235cf2204cf3a">setParentLayerable</a> (<a class="el" href="classQCPLayerable.html">QCPLayerable</a> *<a class="el" href="classQCPLayerable.html#a98d79f5b716d45eac4347befe546d0ec">parentLayerable</a>)</td></tr>
<tr class="separator:aa23c893671f1f6744ac235cf2204cf3a inherit pro_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af94484cfb7cbbddb7de522e9be71d9a4 inherit pro_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#af94484cfb7cbbddb7de522e9be71d9a4">moveToLayer</a> (<a class="el" href="classQCPLayer.html">QCPLayer</a> *layer, bool prepend)</td></tr>
<tr class="separator:af94484cfb7cbbddb7de522e9be71d9a4 inherit pro_methods_classQCPLayerable"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a62bd552d1a45aa9accb24b310542279e inherit pro_methods_classQCPLayerable"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classQCPLayerable.html#a62bd552d1a45aa9accb24b310542279e">applyAntialiasingHint</a> (<a class="el" href="classQCPPainter.html">QCPPainter</a> *painter, bool localAntialiased, <a class="el" href="namespaceQCP.html#ae55dbe315d41fe80f29ba88100843a0c">QCP::AntialiasedElement</a> overrideElement) const </td></tr>
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</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>The abstract base class for all items in a plot. </p>
<p>In <a class="el" href="classQCustomPlot.html" title="The central class of the library. This is the QWidget which displays the plot and interacts with the ...">QCustomPlot</a>, items are supplemental graphical elements that are neither plottables (<a class="el" href="classQCPAbstractPlottable.html" title="The abstract base class for all data representing objects in a plot. ">QCPAbstractPlottable</a>) nor axes (<a class="el" href="classQCPAxis.html" title="Manages a single axis inside a QCustomPlot. ">QCPAxis</a>). While plottables are always tied to two axes and thus plot coordinates, items can also be placed in absolute coordinates independent of any axes. Each specific item has at least one <a class="el" href="classQCPItemPosition.html" title="Manages the position of an item. ">QCPItemPosition</a> member which controls the positioning. Some items are defined by more than one coordinate and thus have two or more <a class="el" href="classQCPItemPosition.html" title="Manages the position of an item. ">QCPItemPosition</a> members (For example, <a class="el" href="classQCPItemRect.html" title="A rectangle. ">QCPItemRect</a> has <em>topLeft</em> and <em>bottomRight</em>).</p>
<p>This abstract base class defines a very basic interface like visibility and clipping. Since this class is abstract, it can't be instantiated. Use one of the subclasses or create a subclass yourself to create new items.</p>
<p>The built-in items are: </p>
<table class="doxtable">
<tr>
<td><a class="el" href="classQCPItemLine.html" title="A line from one point to another. ">QCPItemLine</a></td><td>A line defined by a start and an end point. May have different ending styles on each side (e.g. arrows). </td></tr>
<tr>
<td><a class="el" href="classQCPItemStraightLine.html" title="A straight line that spans infinitely in both directions. ">QCPItemStraightLine</a></td><td>A straight line defined by a start and a direction point. Unlike <a class="el" href="classQCPItemLine.html" title="A line from one point to another. ">QCPItemLine</a>, the straight line is infinitely long and has no endings. </td></tr>
<tr>
<td><a class="el" href="classQCPItemCurve.html" title="A curved line from one point to another. ">QCPItemCurve</a></td><td>A curve defined by start, end and two intermediate control points. May have different ending styles on each side (e.g. arrows). </td></tr>
<tr>
<td><a class="el" href="classQCPItemRect.html" title="A rectangle. ">QCPItemRect</a></td><td>A rectangle </td></tr>
<tr>
<td><a class="el" href="classQCPItemEllipse.html" title="An ellipse. ">QCPItemEllipse</a></td><td>An ellipse </td></tr>
<tr>
<td><a class="el" href="classQCPItemPixmap.html" title="An arbitrary pixmap. ">QCPItemPixmap</a></td><td>An arbitrary pixmap </td></tr>
<tr>
<td><a class="el" href="classQCPItemText.html" title="A text label. ">QCPItemText</a></td><td>A text label </td></tr>
<tr>
<td><a class="el" href="classQCPItemBracket.html" title="A bracket for referencing/highlighting certain parts in the plot. ">QCPItemBracket</a></td><td>A bracket which may be used to reference/highlight certain parts in the plot. </td></tr>
<tr>
<td><a class="el" href="classQCPItemTracer.html" title="Item that sticks to QCPGraph data points. ">QCPItemTracer</a></td><td>An item that can be attached to a <a class="el" href="classQCPGraph.html" title="A plottable representing a graph in a plot. ">QCPGraph</a> and sticks to its data points, given a key coordinate. </td></tr>
</table>
<h1><a class="anchor" id="items-clipping"></a>
Clipping</h1>
<p>Items are by default clipped to the main axis rect (they are only visible inside the axis rect). To make an item visible outside that axis rect, disable clipping via <a class="el" href="classQCPAbstractItem.html#a39e05b9d4176b9accafc746d16ca6a06">setClipToAxisRect(false)</a>.</p>
<p>On the other hand if you want the item to be clipped to a different axis rect, specify it via <a class="el" href="classQCPAbstractItem.html#a7dc75fcbcd10206fe0b75d757ea7a347">setClipAxisRect</a>. This clipAxisRect property of an item is only used for clipping behaviour, and in principle is independent of the coordinate axes the item might be tied to via its position members (<a class="el" href="classQCPItemPosition.html#a2185f45c75ac8cb9be89daeaaad50e37">QCPItemPosition::setAxes</a>). However, it is common that the axis rect for clipping also contains the axes used for the item positions.</p>
<h1><a class="anchor" id="items-using"></a>
Using items</h1>
<p>First you instantiate the item you want to use and add it to the plot: </p>
<div class="fragment"><div class="line"> <a class="code" href="classQCPItemLine.html">QCPItemLine</a> *line = <span class="keyword">new</span> <a class="code" href="classQCPItemLine.html">QCPItemLine</a>(customPlot);</div>
<div class="line"> customPlot->addItem(line);</div>
</div><!-- fragment --><p>by default, the positions of the item are bound to the x- and y-Axis of the plot. So we can just set the plot coordinates where the line should start/end: </p>
<div class="fragment"><div class="line"> line->start-><a class="code" href="classQCPItemPosition.html#aa988ba4e87ab684c9021017dcaba945f">setCoords</a>(-0.1, 0.8);</div>
<div class="line"> line->end-><a class="code" href="classQCPItemPosition.html#aa988ba4e87ab684c9021017dcaba945f">setCoords</a>(1.1, 0.2);</div>
</div><!-- fragment --><p>If we don't want the line to be positioned in plot coordinates but a different coordinate system, e.g. absolute pixel positions on the <a class="el" href="classQCustomPlot.html" title="The central class of the library. This is the QWidget which displays the plot and interacts with the ...">QCustomPlot</a> surface, we need to change the position type like this: </p>
<div class="fragment"><div class="line"> line->start-><a class="code" href="classQCPItemPosition.html#aa476abf71ed8fa4c537457ebb1a754ad">setType</a>(<a class="code" href="classQCPItemPosition.html#aad9936c22bf43e3d358552f6e86dbdc8a564f5e53e550ead1ec5fc7fc7d0b73e0">QCPItemPosition::ptAbsolute</a>);</div>
<div class="line"> line->end-><a class="code" href="classQCPItemPosition.html#aa476abf71ed8fa4c537457ebb1a754ad">setType</a>(<a class="code" href="classQCPItemPosition.html#aad9936c22bf43e3d358552f6e86dbdc8a564f5e53e550ead1ec5fc7fc7d0b73e0">QCPItemPosition::ptAbsolute</a>);</div>
</div><!-- fragment --><p>Then we can set the coordinates, this time in pixels: </p>
<div class="fragment"><div class="line"> line->start-><a class="code" href="classQCPItemPosition.html#aa988ba4e87ab684c9021017dcaba945f">setCoords</a>(100, 200);</div>
<div class="line"> line->end-><a class="code" href="classQCPItemPosition.html#aa988ba4e87ab684c9021017dcaba945f">setCoords</a>(450, 320);</div>
</div><!-- fragment --><p>and make the line visible on the entire <a class="el" href="classQCustomPlot.html" title="The central class of the library. This is the QWidget which displays the plot and interacts with the ...">QCustomPlot</a>, by disabling clipping to the axis rect: </p>
<div class="fragment"><div class="line"> line-><a class="code" href="classQCPAbstractItem.html#a39e05b9d4176b9accafc746d16ca6a06">setClipToAxisRect</a>(<span class="keyword">false</span>);</div>
</div><!-- fragment --><p> For more advanced plots, it is even possible to set different types and parent anchors per X/Y coordinate of an item position, using for example <a class="el" href="classQCPItemPosition.html#a2113b2351d6d00457fb3559a4e20c3ea">QCPItemPosition::setTypeX</a> or <a class="el" href="classQCPItemPosition.html#add71461a973927c74e42179480916d9c">QCPItemPosition::setParentAnchorX</a>. For details, see the documentation of <a class="el" href="classQCPItemPosition.html">QCPItemPosition</a>.</p>
<h1><a class="anchor" id="items-subclassing"></a>
Creating own items</h1>
<p>To create an own item, you implement a subclass of <a class="el" href="classQCPAbstractItem.html" title="The abstract base class for all items in a plot. ">QCPAbstractItem</a>. These are the pure virtual functions, you must implement: </p>
<ul>
<li><a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a> </li>
<li><a class="el" href="classQCPAbstractItem.html#ad0dc056f650c3ca73414e6b4f01674ef">draw</a></li>
</ul>
<p>See the documentation of those functions for what they need to do.</p>
<h2><a class="anchor" id="items-positioning"></a>
Allowing the item to be positioned</h2>
<p>As mentioned, item positions are represented by <a class="el" href="classQCPItemPosition.html" title="Manages the position of an item. ">QCPItemPosition</a> members. Let's assume the new item shall have only one point as its position (as opposed to two like a rect or multiple like a polygon). You then add a public member of type <a class="el" href="classQCPItemPosition.html" title="Manages the position of an item. ">QCPItemPosition</a> like so:</p>
<div class="fragment"><div class="line"><a class="code" href="classQCPItemPosition.html">QCPItemPosition</a> * <span class="keyword">const</span> myPosition;</div>
</div><!-- fragment --><p>the const makes sure the pointer itself can't be modified from the user of your new item (the <a class="el" href="classQCPItemPosition.html" title="Manages the position of an item. ">QCPItemPosition</a> instance it points to, can be modified, of course). The initialization of this pointer is made easy with the <a class="el" href="classQCPAbstractItem.html#a75036d39c4d4e2e1a7dd145fff915d32">createPosition</a> function. Just assign the return value of this function to each <a class="el" href="classQCPItemPosition.html" title="Manages the position of an item. ">QCPItemPosition</a> in the constructor of your item. <a class="el" href="classQCPAbstractItem.html#a75036d39c4d4e2e1a7dd145fff915d32">createPosition</a> takes a string which is the name of the position, typically this is identical to the variable name. For example, the constructor of QCPItemExample could look like this:</p>
<div class="fragment"><div class="line">QCPItemExample::QCPItemExample(<a class="code" href="classQCustomPlot.html">QCustomPlot</a> *parentPlot) :</div>
<div class="line"> <a class="code" href="classQCPAbstractItem.html">QCPAbstractItem</a>(parentPlot),</div>
<div class="line"> myPosition(<a class="code" href="classQCPAbstractItem.html#a75036d39c4d4e2e1a7dd145fff915d32">createPosition</a>(<span class="stringliteral">"myPosition"</span>))</div>
<div class="line">{</div>
<div class="line"> <span class="comment">// other constructor code</span></div>
<div class="line">}</div>
</div><!-- fragment --><h2><a class="anchor" id="items-drawing"></a>
The draw function</h2>
<p>To give your item a visual representation, reimplement the <a class="el" href="classQCPAbstractItem.html#ad0dc056f650c3ca73414e6b4f01674ef">draw</a> function and use the passed <a class="el" href="classQCPPainter.html" title="QPainter subclass used internally. ">QCPPainter</a> to draw the item. You can retrieve the item position in pixel coordinates from the position member(s) via <a class="el" href="classQCPItemPosition.html#ae490f9c76ee2ba33752c495d3b6e8fb5">QCPItemPosition::pixelPoint</a>.</p>
<p>To optimize performance you should calculate a bounding rect first (don't forget to take the pen width into account), check whether it intersects the <a class="el" href="classQCPAbstractItem.html#a538e25ff8856534582f5b2b400a46405">clipRect</a>, and only draw the item at all if this is the case.</p>
<h2><a class="anchor" id="items-selection"></a>
The selectTest function</h2>
<p>Your implementation of the <a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a> function may use the helpers <a class="el" href="classQCPAbstractItem.html#acdca343717d625b8abb3c3e38c0ed39d">distSqrToLine</a> and <a class="el" href="classQCPAbstractItem.html#a4c0e14c4e92df91174cb7183fb363069">rectSelectTest</a>. With these, the implementation of the selection test becomes significantly simpler for most items. See the documentation of <a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a> for what the function parameters mean and what the function should return.</p>
<h2><a class="anchor" id="anchors"></a>
Providing anchors</h2>
<p>Providing anchors (<a class="el" href="classQCPItemAnchor.html" title="An anchor of an item to which positions can be attached to. ">QCPItemAnchor</a>) starts off like adding a position. First you create a public member, e.g.</p>
<div class="fragment"><div class="line"><a class="code" href="classQCPItemAnchor.html">QCPItemAnchor</a> * <span class="keyword">const</span> bottom;</div>
</div><!-- fragment --><p>and create it in the constructor with the <a class="el" href="classQCPAbstractItem.html#af3fc92527802078ca395138748b629a7">createAnchor</a> function, assigning it a name and an anchor id (an integer enumerating all anchors on the item, you may create an own enum for this). Since anchors can be placed anywhere, relative to the item's position(s), your item needs to provide the position of every anchor with the reimplementation of the <a class="el" href="classQCPAbstractItem.html#a94bde62b8a2fc133666dcbb8035deeed">anchorPixelPoint</a>(int anchorId) function.</p>
<p>In essence the <a class="el" href="classQCPItemAnchor.html" title="An anchor of an item to which positions can be attached to. ">QCPItemAnchor</a> is merely an intermediary that itself asks your item for the pixel position when anything attached to the anchor needs to know the coordinates. </p>
</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<p>Base class constructor which initializes base class members. </p>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">void QCPAbstractItem::setClipToAxisRect </td>
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<p>Sets whether the item shall be clipped to an axis rect or whether it shall be visible on the entire <a class="el" href="classQCustomPlot.html" title="The central class of the library. This is the QWidget which displays the plot and interacts with the ...">QCustomPlot</a>. The axis rect can be set with <a class="el" href="classQCPAbstractItem.html#a7dc75fcbcd10206fe0b75d757ea7a347">setClipAxisRect</a>.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#a7dc75fcbcd10206fe0b75d757ea7a347">setClipAxisRect</a> </dd></dl>
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<td class="memname">void QCPAbstractItem::setClipAxisRect </td>
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<p>Sets the clip axis rect. It defines the rect that will be used to clip the item when <a class="el" href="classQCPAbstractItem.html#a39e05b9d4176b9accafc746d16ca6a06">setClipToAxisRect</a> is set to true.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#a39e05b9d4176b9accafc746d16ca6a06">setClipToAxisRect</a> </dd></dl>
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<p>Sets whether the user can (de-)select this item by clicking on the <a class="el" href="classQCustomPlot.html" title="The central class of the library. This is the QWidget which displays the plot and interacts with the ...">QCustomPlot</a> surface. (When <a class="el" href="classQCustomPlot.html#a5ee1e2f6ae27419deca53e75907c27e5">QCustomPlot::setInteractions</a> contains QCustomPlot::iSelectItems.)</p>
<p>However, even when <em>selectable</em> was set to false, it is possible to set the selection manually, by calling <a class="el" href="classQCPAbstractItem.html#a203de94ad586cc44d16c9565f49d3378">setSelected</a>.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCustomPlot.html#a5ee1e2f6ae27419deca53e75907c27e5">QCustomPlot::setInteractions</a>, <a class="el" href="classQCPAbstractItem.html#a203de94ad586cc44d16c9565f49d3378">setSelected</a> </dd></dl>
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<p>Sets whether this item is selected or not. When selected, it might use a different visual appearance (e.g. pen and brush), this depends on the specific item though.</p>
<p>The entire selection mechanism for items is handled automatically when <a class="el" href="classQCustomPlot.html#a5ee1e2f6ae27419deca53e75907c27e5">QCustomPlot::setInteractions</a> contains QCustomPlot::iSelectItems. You only need to call this function when you wish to change the selection state manually.</p>
<p>This function can change the selection state even when <a class="el" href="classQCPAbstractItem.html#a8a8e32a55bc478b849756a78c2d87fd2">setSelectable</a> was set to false.</p>
<p>emits the <a class="el" href="classQCPAbstractItem.html#aa5cffb034fc65dbb91c77e02c1c14251">selectionChanged</a> signal when <em>selected</em> is different from the previous selection state.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#a8a8e32a55bc478b849756a78c2d87fd2">setSelectable</a>, <a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a> </dd></dl>
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<td class="memname">virtual double QCPAbstractItem::selectTest </td>
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<p>This function is used to decide whether a click hits a layerable object or not.</p>
<p><em>pos</em> is a point in pixel coordinates on the <a class="el" href="classQCustomPlot.html" title="The central class of the library. This is the QWidget which displays the plot and interacts with the ...">QCustomPlot</a> surface. This function returns the shortest pixel distance of this point to the object. If the object is either invisible or the distance couldn't be determined, -1.0 is returned. Further, if <em>onlySelectable</em> is true and the object is not selectable, -1.0 is returned, too.</p>
<p>If the object is represented not by single lines but by an area like a <a class="el" href="classQCPItemText.html">QCPItemText</a> or the bars of a <a class="el" href="classQCPBars.html">QCPBars</a> plottable, a click inside the area should also be considered a hit. In these cases this function thus returns a constant value greater zero but still below the parent plot's selection tolerance. (typically the selectionTolerance multiplied by 0.99).</p>
<p>Providing a constant value for area objects allows selecting line objects even when they are obscured by such area objects, by clicking close to the lines (i.e. closer than 0.99*selectionTolerance).</p>
<p>The actual setting of the selection state is not done by this function. This is handled by the parent <a class="el" href="classQCustomPlot.html" title="The central class of the library. This is the QWidget which displays the plot and interacts with the ...">QCustomPlot</a> when the mouseReleaseEvent occurs, and the finally selected object is notified via the selectEvent/deselectEvent methods.</p>
<p><em>details</em> is an optional output parameter. Every layerable subclass may place any information in <em>details</em>. This information will be passed to <a class="el" href="classQCPAbstractItem.html#aaf92af7b9893712959a6c073d334d88d">selectEvent</a> when the parent <a class="el" href="classQCustomPlot.html" title="The central class of the library. This is the QWidget which displays the plot and interacts with the ...">QCustomPlot</a> decides on the basis of this selectTest call, that the object was successfully selected. The subsequent call to <a class="el" href="classQCPAbstractItem.html#aaf92af7b9893712959a6c073d334d88d">selectEvent</a> will carry the <em>details</em>. This is useful for multi-part objects (like <a class="el" href="classQCPAxis.html" title="Manages a single axis inside a QCustomPlot. ">QCPAxis</a>). This way, a possibly complex calculation to decide which part was clicked is only done once in <a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a>. The result (i.e. the actually clicked part) can then be placed in <em>details</em>. So in the subsequent <a class="el" href="classQCPAbstractItem.html#aaf92af7b9893712959a6c073d334d88d">selectEvent</a>, the decision which part was selected doesn't have to be done a second time for a single selection operation.</p>
<p>You may pass 0 as <em>details</em> to indicate that you are not interested in those selection details.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#aaf92af7b9893712959a6c073d334d88d">selectEvent</a>, <a class="el" href="classQCPAbstractItem.html#a91f090d6763cfedb0749219c63788ae9">deselectEvent</a>, <a class="el" href="classQCustomPlot.html#a5ee1e2f6ae27419deca53e75907c27e5">QCustomPlot::setInteractions</a> </dd></dl>
<p>Reimplemented from <a class="el" href="classQCPLayerable.html#a4001c4d0dfec55598efa4d531f2179a9">QCPLayerable</a>.</p>
<p>Implemented in <a class="el" href="classQCPItemTracer.html#ae71f3728421c83c188c117279ca050fd">QCPItemTracer</a>, <a class="el" href="classQCPItemText.html#a285b95bb6634c2e4f7768abb7a8bc69c">QCPItemText</a>, <a class="el" href="classQCPItemBracket.html#aa6933caff1d42c54bcebc769ef88c798">QCPItemBracket</a>, <a class="el" href="classQCPItemPixmap.html#a9f8436aa141fa0fb504191c882c2f4d9">QCPItemPixmap</a>, <a class="el" href="classQCPItemCurve.html#a741375c11667b5f9c95b2683f93ee514">QCPItemCurve</a>, <a class="el" href="classQCPItemLine.html#a7541e5d9378ca121d07b0df3b24f7178">QCPItemLine</a>, <a class="el" href="classQCPItemEllipse.html#acd7e5f9528630b2ab5987e2a5782eb7c">QCPItemEllipse</a>, <a class="el" href="classQCPItemRect.html#af13b0797079b40b73d1c7286b76f18ac">QCPItemRect</a>, and <a class="el" href="classQCPItemStraightLine.html#a64cc3796f58ce856012732603edb2f1c">QCPItemStraightLine</a>.</p>
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<p>Returns all positions of the item in a list.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#a8454b9941960b840608a5a1e00b1977d">anchors</a>, <a class="el" href="classQCPAbstractItem.html#af71345bd150f87fa1d2442837b87bb59">position</a> </dd></dl>
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<p>Returns all anchors of the item in a list. Note that since a position (<a class="el" href="classQCPItemPosition.html" title="Manages the position of an item. ">QCPItemPosition</a>) is always also an anchor, the list will also contain the positions of this item.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#adf6a680cc29a6bce8345c3b6af3a91a1">positions</a>, <a class="el" href="classQCPAbstractItem.html#abed974cba7cc02608c71dad4638e008d">anchor</a> </dd></dl>
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<td class="memname"><a class="el" href="classQCPItemPosition.html">QCPItemPosition</a> * QCPAbstractItem::position </td>
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<p>Returns the <a class="el" href="classQCPItemPosition.html" title="Manages the position of an item. ">QCPItemPosition</a> with the specified <em>name</em>. If this item doesn't have a position by that name, returns 0.</p>
<p>This function provides an alternative way to access item positions. Normally, you access positions direcly by their member pointers (which typically have the same variable name as <em>name</em>).</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#adf6a680cc29a6bce8345c3b6af3a91a1">positions</a>, <a class="el" href="classQCPAbstractItem.html#abed974cba7cc02608c71dad4638e008d">anchor</a> </dd></dl>
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<p>Returns the <a class="el" href="classQCPItemAnchor.html" title="An anchor of an item to which positions can be attached to. ">QCPItemAnchor</a> with the specified <em>name</em>. If this item doesn't have an anchor by that name, returns 0.</p>
<p>This function provides an alternative way to access item anchors. Normally, you access anchors direcly by their member pointers (which typically have the same variable name as <em>name</em>).</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#a8454b9941960b840608a5a1e00b1977d">anchors</a>, <a class="el" href="classQCPAbstractItem.html#af71345bd150f87fa1d2442837b87bb59">position</a> </dd></dl>
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<p>Returns whether this item has an anchor with the specified <em>name</em>.</p>
<p>Note that you can check for positions with this function, too. This is because every position is also an anchor (<a class="el" href="classQCPItemPosition.html" title="Manages the position of an item. ">QCPItemPosition</a> inherits from <a class="el" href="classQCPItemAnchor.html" title="An anchor of an item to which positions can be attached to. ">QCPItemAnchor</a>).</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#abed974cba7cc02608c71dad4638e008d">anchor</a>, <a class="el" href="classQCPAbstractItem.html#af71345bd150f87fa1d2442837b87bb59">position</a> </dd></dl>
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<p>This signal is emitted when the selection state of this item has changed, either by user interaction or by a direct call to <a class="el" href="classQCPAbstractItem.html#a203de94ad586cc44d16c9565f49d3378">setSelected</a>. </p>
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<td class="memname"><a class="el" href="namespaceQCP.html#a2ad6bb6281c7c2d593d4277b44c2b037">QCP::Interaction</a> QCPAbstractItem::selectionCategory </td>
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<p>Returns the selection category this layerable shall belong to. The selection category is used in conjunction with <a class="el" href="classQCustomPlot.html#a5ee1e2f6ae27419deca53e75907c27e5">QCustomPlot::setInteractions</a> to control which objects are selectable and which aren't.</p>
<p>Subclasses that don't fit any of the normal <a class="el" href="namespaceQCP.html#a2ad6bb6281c7c2d593d4277b44c2b037">QCP::Interaction</a> values can use <a class="el" href="namespaceQCP.html#a2ad6bb6281c7c2d593d4277b44c2b037af67a50bc26147a13b551b3a625374949">QCP::iSelectOther</a>. This is what the default implementation returns.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCustomPlot.html#a5ee1e2f6ae27419deca53e75907c27e5">QCustomPlot::setInteractions</a> </dd></dl>
<p>Reimplemented from <a class="el" href="classQCPLayerable.html#aa4035e586b7f317a06ba7e74e242a5ea">QCPLayerable</a>.</p>
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<p>Returns the rect the visual representation of this item is clipped to. This depends on the current setting of <a class="el" href="classQCPAbstractItem.html#a39e05b9d4176b9accafc746d16ca6a06">setClipToAxisRect</a> as well as the axis rect set with <a class="el" href="classQCPAbstractItem.html#a7dc75fcbcd10206fe0b75d757ea7a347">setClipAxisRect</a>.</p>
<p>If the item is not clipped to an axis rect, the <a class="el" href="classQCustomPlot.html#a953ecdbc28018e7e84cb6213ad3d88c2">QCustomPlot::viewport</a> rect is returned.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#ad0dc056f650c3ca73414e6b4f01674ef">draw</a> </dd></dl>
<p>Reimplemented from <a class="el" href="classQCPLayerable.html#a07a8f746640c3704b09910df297afcba">QCPLayerable</a>.</p>
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<td class="memname">void QCPAbstractItem::applyDefaultAntialiasingHint </td>
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<td class="paramtype"><a class="el" href="classQCPPainter.html">QCPPainter</a> * </td>
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<p>A convenience function to easily set the QPainter::Antialiased hint on the provided <em>painter</em> before drawing item lines.</p>
<p>This is the antialiasing state the painter passed to the <a class="el" href="classQCPAbstractItem.html#ad0dc056f650c3ca73414e6b4f01674ef">draw</a> method is in by default.</p>
<p>This function takes into account the local setting of the antialiasing flag as well as the overrides set with <a class="el" href="classQCustomPlot.html#af6f91e5eab1be85f67c556e98c3745e8">QCustomPlot::setAntialiasedElements</a> and <a class="el" href="classQCustomPlot.html#ae10d685b5eabea2999fb8775ca173c24">QCustomPlot::setNotAntialiasedElements</a>.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPLayerable.html#a4fd43e89be4a553ead41652565ff0581">setAntialiased</a> </dd></dl>
<p>Implements <a class="el" href="classQCPLayerable.html#afdf83ddc6a265cbf4c89fe99d3d93473">QCPLayerable</a>.</p>
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<td class="memname">void QCPAbstractItem::draw </td>
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<p>Draws this item with the provided <em>painter</em>.</p>
<p>The cliprect of the provided painter is set to the rect returned by <a class="el" href="classQCPAbstractItem.html#a538e25ff8856534582f5b2b400a46405">clipRect</a> before this function is called. The clipRect depends on the clipping settings defined by <a class="el" href="classQCPAbstractItem.html#a39e05b9d4176b9accafc746d16ca6a06">setClipToAxisRect</a> and <a class="el" href="classQCPAbstractItem.html#a7dc75fcbcd10206fe0b75d757ea7a347">setClipAxisRect</a>. </p>
<p>Implements <a class="el" href="classQCPLayerable.html#aecf2f7087482d4b6a78cb2770e5ed12d">QCPLayerable</a>.</p>
<p>Implemented in <a class="el" href="classQCPItemText.html#a8793adb271ab79b4cf391dc55e9987f1">QCPItemText</a>, <a class="el" href="classQCPItemTracer.html#aaaf49b48382c730ec9be0e74c2538315">QCPItemTracer</a>, <a class="el" href="classQCPItemPixmap.html#a879e8076c2db01a38b34cfa73ec95d2f">QCPItemPixmap</a>, <a class="el" href="classQCPItemEllipse.html#afe97ec827adb05f000fe007783faae3c">QCPItemEllipse</a>, <a class="el" href="classQCPItemBracket.html#a8343cf0559c64886add7aa7f4b22f1a6">QCPItemBracket</a>, <a class="el" href="classQCPItemRect.html#a18cd583638b876cdd50f1a155ec182aa">QCPItemRect</a>, <a class="el" href="classQCPItemCurve.html#a56cb5b72cd02db2eda598274a39839a9">QCPItemCurve</a>, <a class="el" href="classQCPItemLine.html#a1fc045dd33919f8006df0692aeb0e84a">QCPItemLine</a>, and <a class="el" href="classQCPItemStraightLine.html#a2daa1e1253216c26565d56a2d5530170">QCPItemStraightLine</a>.</p>
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<td class="memname">void QCPAbstractItem::selectEvent </td>
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<p>This event is called when the layerable shall be selected, as a consequence of a click by the user. Subclasses should react to it by setting their selection state appropriately. The default implementation does nothing.</p>
<p><em>event</em> is the mouse event that caused the selection. <em>additive</em> indicates, whether the user was holding the multi-select-modifier while performing the selection (see <a class="el" href="classQCustomPlot.html#a8fc96e3b5138a06759a2a90c166df516">QCustomPlot::setMultiSelectModifier</a>). if <em>additive</em> is true, the selection state must be toggled (i.e. become selected when unselected and unselected when selected).</p>
<p>Every selectEvent is preceded by a call to <a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a>, which has returned positively (i.e. returned a value greater than 0 and less than the selection tolerance of the parent <a class="el" href="classQCustomPlot.html" title="The central class of the library. This is the QWidget which displays the plot and interacts with the ...">QCustomPlot</a>). The <em>details</em> data you output from <a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a> is fed back via <em>details</em> here. You may use it to transport any kind of information from the selectTest to the possibly subsequent selectEvent. Usually <em>details</em> is used to transfer which part was clicked, if it is a layerable that has multiple individually selectable parts (like <a class="el" href="classQCPAxis.html" title="Manages a single axis inside a QCustomPlot. ">QCPAxis</a>). This way selectEvent doesn't need to do the calculation again to find out which part was actually clicked.</p>
<p><em>selectionStateChanged</em> is an output parameter. If the pointer is non-null, this function must set the value either to true or false, depending on whether the selection state of this layerable was actually changed. For layerables that only are selectable as a whole and not in parts, this is simple: if <em>additive</em> is true, <em>selectionStateChanged</em> must also be set to true, because the selection toggles. If <em>additive</em> is false, <em>selectionStateChanged</em> is only set to true, if the layerable was previously unselected and now is switched to the selected state.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a>, <a class="el" href="classQCPAbstractItem.html#a91f090d6763cfedb0749219c63788ae9">deselectEvent</a> </dd></dl>
<p>Reimplemented from <a class="el" href="classQCPLayerable.html#a7498c2d0d081cf7cad0fb3bb93aa0e91">QCPLayerable</a>.</p>
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<td class="memname">void QCPAbstractItem::deselectEvent </td>
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<p>This event is called when the layerable shall be deselected, either as consequence of a user interaction or a call to <a class="el" href="classQCustomPlot.html#a9d4808ab925b003054085246c92a257c">QCustomPlot::deselectAll</a>. Subclasses should react to it by unsetting their selection appropriately.</p>
<p>just as in <a class="el" href="classQCPAbstractItem.html#aaf92af7b9893712959a6c073d334d88d">selectEvent</a>, the output parameter <em>selectionStateChanged</em> (if non-null), must return true or false when the selection state of this layerable has changed or not changed, respectively.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a>, <a class="el" href="classQCPAbstractItem.html#aaf92af7b9893712959a6c073d334d88d">selectEvent</a> </dd></dl>
<p>Reimplemented from <a class="el" href="classQCPLayerable.html#ae546370644a5551c76af739afc008bee">QCPLayerable</a>.</p>
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<p>Returns the pixel position of the anchor with Id <em>anchorId</em>. This function must be reimplemented in item subclasses if they want to provide anchors (<a class="el" href="classQCPItemAnchor.html" title="An anchor of an item to which positions can be attached to. ">QCPItemAnchor</a>).</p>
<p>For example, if the item has two anchors with id 0 and 1, this function takes one of these anchor ids and returns the respective pixel points of the specified anchor.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#af3fc92527802078ca395138748b629a7">createAnchor</a> </dd></dl>
<p>Reimplemented in <a class="el" href="classQCPItemText.html#ad248f988534a9d07bc7c220a2457142a">QCPItemText</a>, <a class="el" href="classQCPItemPixmap.html#a88abce3c1027f371cddcf6dad35ffbb1">QCPItemPixmap</a>, <a class="el" href="classQCPItemEllipse.html#ad3c607304dba081e2f778b6a81b903bb">QCPItemEllipse</a>, <a class="el" href="classQCPItemBracket.html#ac76827e3acba5faee81f149af4047a39">QCPItemBracket</a>, and <a class="el" href="classQCPItemRect.html#ae0973f8281fb52361b0c99ee899be07e">QCPItemRect</a>.</p>
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<td class="memname">double QCPAbstractItem::distSqrToLine </td>
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<p>Finds the shortest squared distance of <em>point</em> to the line segment defined by <em>start</em> and <em>end</em>.</p>
<p>This function may be used to help with the implementation of the <a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a> function for specific items.</p>
<dl class="section note"><dt>Note</dt><dd>This function is identical to <a class="el" href="classQCPAbstractPlottable.html#a5ea1cab44ca912dcdc96ed81ec5bed5d">QCPAbstractPlottable::distSqrToLine</a></dd></dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#a4c0e14c4e92df91174cb7183fb363069">rectSelectTest</a> </dd></dl>
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<p>A convenience function which returns the selectTest value for a specified <em>rect</em> and a specified click position <em>pos</em>. <em>filledRect</em> defines whether a click inside the rect should also be considered a hit or whether only the rect border is sensitive to hits.</p>
<p>This function may be used to help with the implementation of the <a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a> function for specific items.</p>
<p>For example, if your item consists of four rects, call this function four times, once for each rect, in your <a class="el" href="classQCPAbstractItem.html#a96d522d10ffc0413b9a366c6f7f0476b">selectTest</a> reimplementation. Finally, return the minimum of all four returned values.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#acdca343717d625b8abb3c3e38c0ed39d">distSqrToLine</a> </dd></dl>
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<td class="memname"><a class="el" href="classQCPItemPosition.html">QCPItemPosition</a> * QCPAbstractItem::createPosition </td>
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<p>Creates a <a class="el" href="classQCPItemPosition.html" title="Manages the position of an item. ">QCPItemPosition</a>, registers it with this item and returns a pointer to it. The specified <em>name</em> must be a unique string that is usually identical to the variable name of the position member (This is needed to provide the name-based <a class="el" href="classQCPAbstractItem.html#af71345bd150f87fa1d2442837b87bb59">position</a> access to positions).</p>
<p>Don't delete positions created by this function manually, as the item will take care of it.</p>
<p>Use this function in the constructor (initialization list) of the specific item subclass to create each position member. Don't create QCPItemPositions with <b>new</b> yourself, because they won't be registered with the item properly.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#af3fc92527802078ca395138748b629a7">createAnchor</a> </dd></dl>
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<td class="memname"><a class="el" href="classQCPItemAnchor.html">QCPItemAnchor</a> * QCPAbstractItem::createAnchor </td>
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<p>Creates a <a class="el" href="classQCPItemAnchor.html" title="An anchor of an item to which positions can be attached to. ">QCPItemAnchor</a>, registers it with this item and returns a pointer to it. The specified <em>name</em> must be a unique string that is usually identical to the variable name of the anchor member (This is needed to provide the name based <a class="el" href="classQCPAbstractItem.html#abed974cba7cc02608c71dad4638e008d">anchor</a> access to anchors).</p>
<p>The <em>anchorId</em> must be a number identifying the created anchor. It is recommended to create an enum (e.g. "AnchorIndex") for this on each item that uses anchors. This id is used by the anchor to identify itself when it calls <a class="el" href="classQCPAbstractItem.html#a94bde62b8a2fc133666dcbb8035deeed">QCPAbstractItem::anchorPixelPoint</a>. That function then returns the correct pixel coordinates for the passed anchor id.</p>
<p>Don't delete anchors created by this function manually, as the item will take care of it.</p>
<p>Use this function in the constructor (initialization list) of the specific item subclass to create each anchor member. Don't create QCPItemAnchors with <b>new</b> yourself, because then they won't be registered with the item properly.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="classQCPAbstractItem.html#a75036d39c4d4e2e1a7dd145fff915d32">createPosition</a> </dd></dl>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li>src/item.h</li>
<li>src/item.cpp</li>
</ul>
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