class_qwt_picker.html

QWT5.01用于Qt开发的二维图形库程序

          <td class="md" nowrap valign="top">QObject *&nbsp;</td>
          <td class="mdname" nowrap> <em>o</em>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>QEvent *&nbsp;</td>
          <td class="mdname" nowrap> <em>e</em></td>
        </tr>
        <tr>
          <td class="md"></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [virtual]</code></td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>
Event filter. 
<p>
When <a class="el" href="class_qwt_picker.html#984299a27421d57291bb84c8c08df4e5">isEnabled()</a> == true all events of the observed widget are filtered. Mouse and keyboard events are translated into widgetMouse- and widgetKey- and widgetWheel-events. Paint and Resize events are handled to keep rubberband and tracker up to date.<p>
<dl compact><dt><b>See also:</b></dt><dd>event(), <a class="el" href="class_qwt_picker.html#4bfae8da37c3936ae73d4798cca4a3d9">widgetMousePressEvent()</a>, <a class="el" href="class_qwt_picker.html#c009633e005b6290e07b902f2a58e45e">widgetMouseReleaseEvent()</a>, <a class="el" href="class_qwt_picker.html#f1ffb07c24be57cd4a753b04412b3212">widgetMouseDoubleClickEvent()</a>, <a class="el" href="class_qwt_picker.html#88b203109a4d3b26c2e0bee110c56c9d">widgetMouseMoveEvent()</a>, <a class="el" href="class_qwt_picker.html#f92ffabe291a6254378dc932c5cce0a7">widgetWheelEvent()</a>, <a class="el" href="class_qwt_picker.html#f5bc441b2fc143363563922a3b3c70ae">widgetKeyPressEvent()</a>, <a class="el" href="class_qwt_picker.html#9f2c739a619be794b22a10ede9674a1e">widgetKeyReleaseEvent()</a> </dd></dl>

<p>
Definition at line <a class="el" href="qwt__picker_8cpp-source.html#l00788">788</a> of file <a class="el" href="qwt__picker_8cpp-source.html">qwt_picker.cpp</a>.
<p>
References <a class="el" href="qwt__picker_8cpp-source.html#l00312">parentWidget()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l01213">stretchSelection()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l00953">widgetKeyPressEvent()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l01007">widgetKeyReleaseEvent()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l00882">widgetLeaveEvent()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l00913">widgetMouseDoubleClickEvent()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l00862">widgetMouseMoveEvent()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l00848">widgetMousePressEvent()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l00899">widgetMouseReleaseEvent()</a>, and <a class="el" href="qwt__picker_8cpp-source.html#l00928">widgetWheelEvent()</a>.    </td>
  </tr>
</table>
<a class="anchor" name="f825f383c74928d1541f139e102983f9"></a><!-- doxytag: member="QwtPicker::isActive" ref="f825f383c74928d1541f139e102983f9" args="() const " --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">bool QwtPicker::isActive           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const</td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>
A picker is active between <a class="el" href="class_qwt_picker.html#49cb19aea451e275c5d376235e5a1d83">begin()</a> and <a class="el" href="class_qwt_picker.html#d258c518257cf2f52326905a36efb0c4">end()</a>. <dl compact><dt><b>Returns:</b></dt><dd>true if the selection is active. </dd></dl>

<p>
Definition at line <a class="el" href="qwt__picker_8cpp-source.html#l01193">1193</a> of file <a class="el" href="qwt__picker_8cpp-source.html">qwt_picker.cpp</a>.
<p>
Referenced by <a class="el" href="qwt__picker_8cpp-source.html#l00591">drawRubberBand()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l00717">trackerRect()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l01281">updateDisplay()</a>, <a class="el" href="qwt__plot__zoomer_8cpp-source.html#l00429">QwtPlotZoomer::widgetKeyPressEvent()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l00953">widgetKeyPressEvent()</a>, <a class="el" href="qwt__picker_8cpp-source.html#l00882">widgetLeaveEvent()</a>, and <a class="el" href="qwt__picker_8cpp-source.html#l00862">widgetMouseMoveEvent()</a>.    </td>
  </tr>
</table>
<a class="anchor" name="984299a27421d57291bb84c8c08df4e5"></a><!-- doxytag: member="QwtPicker::isEnabled" ref="984299a27421d57291bb84c8c08df4e5" args="() const " --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">bool QwtPicker::isEnabled           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const</td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>
<dl compact><dt><b>Returns:</b></dt><dd>true when enabled, false otherwise </dd></dl>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_picker.html#a590756369efae6ebf323302a0af5d36">setEnabled</a>, <a class="el" href="class_qwt_picker.html#c149f9cb8fb068f31871e1fe450c376e">eventFilter()</a> </dd></dl>

<p>
Definition at line <a class="el" href="qwt__picker_8cpp-source.html#l00474">474</a> of file <a class="el" href="qwt__picker_8cpp-source.html">qwt_picker.cpp</a>.    </td>
  </tr>
</table>
<a class="anchor" name="59d92670978f200edb61e429afa06542"></a><!-- doxytag: member="QwtPicker::move" ref="59d92670978f200edb61e429afa06542" args="(const QPoint &amp;)" --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">void QwtPicker::move           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const QPoint &amp;&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>pos</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [protected, virtual]</code></td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>
Move the last point of the selection The <a class="el" href="class_qwt_picker.html#dddb4800c1dac0ba807e731f45d40742">moved()</a> signal is emitted.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>pos</em>&nbsp;</td><td>New position </td></tr>
  </table>
</dl>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_picker.html#f825f383c74928d1541f139e102983f9">isActive</a>, <a class="el" href="class_qwt_picker.html#49cb19aea451e275c5d376235e5a1d83">begin()</a>, <a class="el" href="class_qwt_picker.html#d258c518257cf2f52326905a36efb0c4">end()</a>, <a class="el" href="class_qwt_picker.html#5dd2e0ce6b2a6cc50e345ec13aef9255">append()</a> </dd></dl>

<p>
Reimplemented in <a class="el" href="class_qwt_plot_picker.html#7a979d23cd4d398e309409e76635bcf4">QwtPlotPicker</a>.
<p>
Definition at line <a class="el" href="qwt__picker_8cpp-source.html#l01165">1165</a> of file <a class="el" href="qwt__picker_8cpp-source.html">qwt_picker.cpp</a>.
<p>
References <a class="el" href="class_qwt_picker.html#dddb4800c1dac0ba807e731f45d40742">moved()</a>, and <a class="el" href="qwt__picker_8cpp-source.html#l01281">updateDisplay()</a>.
<p>
Referenced by <a class="el" href="qwt__plot__picker_8cpp-source.html#l00259">QwtPlotPicker::move()</a>.    </td>
  </tr>
</table>
<a class="anchor" name="dddb4800c1dac0ba807e731f45d40742"></a><!-- doxytag: member="QwtPicker::moved" ref="dddb4800c1dac0ba807e731f45d40742" args="(const QPoint &amp;pos)" --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">void QwtPicker::moved           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const QPoint &amp;&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>pos</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [signal]</code></td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>
A signal emitted whenever the last appended point of the selection has been moved.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>pos</em>&nbsp;</td><td>Position of the moved last point of the selection. </td></tr>
  </table>
</dl>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_picker.html#59d92670978f200edb61e429afa06542">move()</a>, <a class="el" href="class_qwt_picker.html#d52219271a7c8efab35ded14ac89827a">appended()</a> </dd></dl>

<p>
Referenced by <a class="el" href="qwt__picker_8cpp-source.html#l01165">move()</a>.    </td>
  </tr>
</table>
<a class="anchor" name="250dc5daf40a049f8db1f7ed730802d3"></a><!-- doxytag: member="QwtPicker::parentWidget" ref="250dc5daf40a049f8db1f7ed730802d3" args="() const " --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">const QWidget * QwtPicker::parentWidget           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const</td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>
Return the parent widget, where the selection happens. 
<p>

<p>
Definition at line <a class="el" href="qwt__picker_8cpp-source.html#l00322">322</a> of file <a class="el" href="qwt__picker_8cpp-source.html">qwt_picker.cpp</a>.    </td>
  </tr>
</table>
<a class="anchor" name="da0c12257e006f0066d22c3eb83f667e"></a><!-- doxytag: member="QwtPicker::parentWidget" ref="da0c12257e006f0066d22c3eb83f667e" args="()" --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowra