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<h1>qwt_picker.cpp</h1><pre class="fragment"><div>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</span>
00002 <span class="comment"> * Qwt Widget Library</span>
00003 <span class="comment"> * Copyright (C) 1997   Josef Wilgen</span>
00004 <span class="comment"> * Copyright (C) 2002   Uwe Rathmann</span>
00005 <span class="comment"> *</span>
00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span>
00008 <span class="comment"> *****************************************************************************/</span>
00009 
00010 <span class="preprocessor">#include &lt;qapplication.h&gt;</span>
00011 <span class="preprocessor">#include &lt;qevent.h&gt;</span>
00012 <span class="preprocessor">#include &lt;qpainter.h&gt;</span>
00013 <span class="preprocessor">#include &lt;qframe.h&gt;</span>
00014 <span class="preprocessor">#include &lt;qcursor.h&gt;</span>
00015 <span class="preprocessor">#include "qwt_text.h"</span>
00016 <span class="preprocessor">#include "qwt_painter.h"</span>
00017 <span class="preprocessor">#include "qwt_picker_machine.h"</span>
00018 <span class="preprocessor">#include "qwt_picker.h"</span>
00019 
<a name="l00030"></a><a class="code" href="class_qwt_picker.html#a0">00030</a> <a class="code" href="class_qwt_picker.html#a0">QwtPicker::QwtPicker</a>(QWidget *parent, <span class="keyword">const</span> <span class="keywordtype">char</span> *name):
00031     QObject(parent, name)
00032 {
00033     init(parent, NoSelection, NoRubberBand, AlwaysOff);
00034 }
00035 
<a name="l00046"></a><a class="code" href="class_qwt_picker.html#a1">00046</a> <a class="code" href="class_qwt_picker.html#a0">QwtPicker::QwtPicker</a>(<span class="keywordtype">int</span> selectionFlags, RubberBand rubberBand,
00047         DisplayMode cursorLabelMode, QWidget *parent, <span class="keyword">const</span> <span class="keywordtype">char</span> *name):
00048     QObject(parent, name)
00049 {
00050     init(parent, selectionFlags, rubberBand, cursorLabelMode);
00051 }
00052 
<a name="l00054"></a><a class="code" href="class_qwt_picker.html#a2">00054</a> <a class="code" href="class_qwt_picker.html#a2">QwtPicker::~QwtPicker</a>()
00055 {
00056     setMouseTracking(FALSE);
00057     <span class="keyword">delete</span> d_stateMachine;
00058 }
00059 
00061 <span class="keywordtype">void</span> QwtPicker::init(QWidget *parent, <span class="keywordtype">int</span> selectionFlags, 
00062     RubberBand rubberBand, DisplayMode cursorLabelMode)
00063 {
00064     d_rubberBand = rubberBand;
00065     d_enabled = FALSE;
00066     d_resizeMode = Stretch;
00067     d_cursorLabelMode = AlwaysOff;
00068     d_isActive = FALSE;
00069     d_labelPosition = QPoint(-1, -1);
00070     d_mouseTracking = FALSE;
00071 
00072     d_stateMachine = NULL;
00073     <a class="code" href="class_qwt_picker.html#a3">setSelectionFlags</a>(selectionFlags);
00074 
00075     <span class="keywordflow">if</span> ( parent )
00076     {
00077         <span class="keywordflow">if</span> ( parent-&gt;focusPolicy() == QWidget::NoFocus )
00078             parent-&gt;setFocusPolicy(QWidget::WheelFocus);
00079 
00080         d_cursorLabelFont = parent-&gt;font();
00081         d_mouseTracking = parent-&gt;hasMouseTracking();
00082         <a class="code" href="class_qwt_picker.html#a18">setEnabled</a>(TRUE);
00083     }
00084     <a class="code" href="class_qwt_picker.html#a7">setCursorLabelMode</a>(cursorLabelMode);
00085 }
00086 
00090 <span class="keywordtype">void</span> QwtPicker::setStateMachine(<a class="code" href="class_qwt_picker_machine.html">QwtPickerMachine</a> *stateMachine)
00091 {
00092     <span class="keywordflow">if</span> ( d_stateMachine != stateMachine )
00093     {
00094         <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a19">isActive</a>() )
00095             <a class="code" href="class_qwt_picker.html#b5">end</a>(FALSE);
00096 
00097         <span class="keyword">delete</span> d_stateMachine;
00098         d_stateMachine = stateMachine;
00099 
00100         <span class="keywordflow">if</span> ( d_stateMachine )
00101             d_stateMachine-&gt;<a class="code" href="class_qwt_picker_machine.html#a2">reset</a>();
00102     }
00103 }
00104 
<a name="l00121"></a><a class="code" href="class_qwt_picker.html#b19">00121</a> <a class="code" href="class_qwt_picker_machine.html">QwtPickerMachine</a> *<a class="code" href="class_qwt_picker.html#b19">QwtPicker::stateMachine</a>(<span class="keywordtype">int</span> flags)<span class="keyword"> const</span>
00122 <span class="keyword"></span>{
00123     <span class="keywordflow">if</span> ( flags &amp; PointSelection )
00124     {
00125         <span class="keywordflow">if</span> ( flags &amp; ClickSelection )
00126             <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_qwt_picker_click_point_machine.html">QwtPickerClickPointMachine</a>;
00127         <span class="keywordflow">else</span>
00128             <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_qwt_picker_drag_point_machine.html">QwtPickerDragPointMachine</a>;
00129     }
00130     <span class="keywordflow">if</span> ( flags &amp; RectSelection )
00131     {
00132         <span class="keywordflow">if</span> ( flags &amp; ClickSelection )
00133             <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_qwt_picker_click_rect_machine.html">QwtPickerClickRectMachine</a>;
00134         <span class="keywordflow">else</span>
00135             <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_qwt_picker_drag_rect_machine.html">QwtPickerDragRectMachine</a>;
00136     }
00137     <span class="keywordflow">if</span> ( flags &amp; PolygonSelection )
00138     {
00139         <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_qwt_picker_polygon_machine.html">QwtPickerPolygonMachine</a>();
00140     }
00141     <span class="keywordflow">return</span> NULL;
00142 }
00143 
<a name="l00145"></a><a class="code" href="class_qwt_picker.html#a21">00145</a> QWidget *<a class="code" href="class_qwt_picker.html#a21">QwtPicker::parentWidget</a>()
00146 {
00147     QObject *obj = parent();
00148     <span class="keywordflow">if</span> ( obj &amp;&amp; obj-&gt;isWidgetType() )
00149         <span class="keywordflow">return</span> (QWidget *)obj;
00150 
00151     <span class="keywordflow">return</span> NULL;
00152 }
00153 
<a name="l00155"></a><a class="code" href="class_qwt_picker.html#a22">00155</a> <span class="keyword">const</span> QWidget *<a class="code" href="class_qwt_picker.html#a21">QwtPicker::parentWidget</a>()<span class="keyword"> const</span>
00156 <span class="keyword"></span>{
00157     QObject *obj = parent();
00158     <span class="keywordflow">if</span> ( obj &amp;&amp; obj-&gt;isWidgetType() )
00159         <span class="keywordflow">return</span> (QWidget *)obj;
00160 
00161     <span class="keywordflow">return</span> NULL;
00162 }
00163 
<a name="l00173"></a><a class="code" href="class_qwt_picker.html#a3">00173</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#a3">QwtPicker::setSelectionFlags</a>(<span class="keywordtype">int</span> flags)
00174 {
00175     d_selectionFlags = flags;
00176     setStateMachine(<a class="code" href="class_qwt_picker.html#b19">stateMachine</a>(flags));
00177 }
00178 
<a name="l00184"></a><a class="code" href="class_qwt_picker.html#a4">00184</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_picker.html#a4">QwtPicker::selectionFlags</a>()<span class="keyword"> const</span>
00185 <span class="keyword"></span>{
00186     <span class="keywordflow">return</span> d_selectionFlags;
00187 }
00188 
<a name="l00197"></a><a class="code" href="class_qwt_picker.html#a5">00197</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#a5">QwtPicker::setRubberBand</a>(RubberBand rubberBand)
00198 {
00199     d_rubberBand = rubberBand;
00200 }
00201 
<a name="l00206"></a><a class="code" href="class_qwt_picker.html#a6">00206</a> <a class="code" href="class_qwt_picker.html#w25">QwtPicker::RubberBand</a> <a class="code" href="class_qwt_picker.html#a6">QwtPicker::rubberBand</a>()<span class="keyword"> const</span>
00207 <span class="keyword"></span>{
00208     <span class="keywordflow">return</span> d_rubberBand;
00209 }
00210 
<a name="l00227"></a><a class="code" href="class_qwt_picker.html#a7">00227</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#a7">QwtPicker::setCursorLabelMode</a>(DisplayMode mode)
00228 {   
00229     <span class="keywordflow">if</span> ( d_cursorLabelMode != mode )
00230     {
00231         d_cursorLabelMode = mode;
00232         setMouseTracking(d_cursorLabelMode == AlwaysOn);
00233     }
00234 }   
00235 
<a name="l00240"></a><a class="code" href="class_qwt_picker.html#a8">00240</a> <a class="code" href="class_qwt_picker.html#w26">QwtPicker::DisplayMode</a> <a class="code" href="class_qwt_picker.html#a8">QwtPicker::cursorLabelMode</a>()<span class="keyword"> const</span>
00241 <span class="keyword"></span>{   
00242     <span class="keywordflow">return</span> d_cursorLabelMode;
00243 }   
00244 
<a name="l00259"></a><a class="code" href="class_qwt_picker.html#a9">00259</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#a9">QwtPicker::setResizeMode</a>(ResizeMode mode)
00260 {
00261     d_resizeMode = mode;
00262 }   
00263 
<a name="l00269"></a><a class="code" href="class_qwt_picker.html#a10">00269</a> <a class="code" href="class_qwt_picker.html#w27">QwtPicker::ResizeMode</a> <a class="code" href="class_qwt_picker.html#a10">QwtPicker::resizeMode</a>()<span class="keyword"> const</span>
00270 <span class="keyword"></span>{   
00271     <span class="keywordflow">return</span> d_resizeMode;
00272 }
00273 
<a name="l00283"></a><a class="code" href="class_qwt_picker.html#a18">00283</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#a18">QwtPicker::setEnabled</a>(<span class="keywordtype">bool</span> enabled)
00284 {
00285     <span class="keywordflow">if</span> ( d_enabled != enabled )
00286     {
00287         QWidget *w = <a class="code" href="class_qwt_picker.html#a21">parentWidget</a>();
00288         <span class="keywordflow">if</span> ( !w )
00289             <span class="keywordflow">return</span>;
00290 
00291         d_enabled = enabled;
00292         <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>();
00293 
00294         <span class="keywordflow">if</span> ( d_enabled )
00295             w-&gt;installEventFilter(<span class="keyword">this</span>);
00296         <span class="keywordflow">else</span>
00297             w-&gt;removeEventFilter(<span class="keyword">this</span>);
00298     }
00299 }
00300 
<a name="l00306"></a><a class="code" href="class_qwt_picker.html#a17">00306</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_picker.html#a17">QwtPicker::isEnabled</a>()<span class="keyword"> const</span>
00307 <span class="keyword"></span>{
00308     <span class="keywordflow">return</span> d_enabled;
00309 }
00310 
<a name="l00317"></a><a class="code" href="class_qwt_picker.html#a15">00317</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#a15">QwtPicker::setCursorLabelFont</a>(<span class="keyword">const</span> QFont &amp;font)
00318 {
00319     <span class="keywordflow">if</span> ( font != d_cursorLabelFont )
00320     {
00321         <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a17">isEnabled</a>() )
00322             <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// erase</span>
00323 
00324         d_cursorLabelFont = font;
00325 
00326         <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a17">isEnabled</a>() )
00327             <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// repaint</span>
00328     }
00329 }
00330 
<a name="l00336"></a><a class="code" href="class_qwt_picker.html#a16">00336</a> QFont <a class="code" href="class_qwt_picker.html#a16">QwtPicker::cursorLabelFont</a>()<span class="keyword"> const</span>
00337 <span class="keyword"></span>{
00338     <span class="keywordflow">return</span> d_cursorLabelFont;
00339 }
00340 
<a name="l00347"></a><a class="code" href="class_qwt_picker.html#a13">00347</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#a13">QwtPicker::setCursorLabelPen</a>(<span class="keyword">const</span> QPen &amp;pen)
00348 {
00349     <span class="keywordflow">if</span> ( pen != d_cursorLabelPen )
00350     {
00351         <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a17">isEnabled</a>() )
00352             <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// erase</span>
00353 
00354         d_cursorLabelPen = pen;
00355 
00356         <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a17">isEnabled</a>() )
00357             <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// repaint</span>
00358     }
00359 }
00360 
<a name="l00365"></a><a class="code" href="class_qwt_picker.html#a14">00365</a> QPen <a class="code" href="class_qwt_picker.html#a14">QwtPicker::cursorLabelPen</a>()<span class="keyword"> const</span>
00366 <span class="keyword"></span>{
00367     <span class="keywordflow">return</span> d_cursorLabelPen;
00368 }
00369 
<a name="l00376"></a><a class="code" href="class_qwt_picker.html#a11">00376</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#a11">QwtPicker::setRubberBandPen</a>(<span class="keyword">const</span> QPen &amp;pen)
00377 {
00378     <span class="keywordflow">if</span> ( pen != d_rubberBandPen )
00379     {
00380         <a class="code" href="class_qwt_picker.html#b13">drawRubberBand</a>(); <span class="comment">// erase</span>
00381         d_rubberBandPen = pen;
00382         <a class="code" href="class_qwt_picker.html#b13">drawRubberBand</a>(); <span class="comment">// repaint</span>
00383     }
00384 }
00385 
<a name="l00390"></a><a class="code" href="class_qwt_picker.html#a12">00390</a> QPen <a class="code" href="class_qwt_picker.html#a12">QwtPicker::rubberBandPen</a>()<span class="keyword"> const</span>
00391 <span class="keyword"></span>{
00392     <span class="keywordflow">return</span> d_rubberBandPen;
00393 }
00394 
<a name="l00408"></a><a class="code" href="class_qwt_picker.html#b18">00408</a> QString <a class="code" href="class_qwt_picker.html#b18">QwtPicker::cursorLabel</a>(<span class="keyword">const</span> QPoint &amp;pos)<span class="keyword"> const</span>
00409 <span class="keyword"></span>{
00410     QString label;
00411 
00412     <span class="keywordflow">switch</span>(<a class="code" href="class_qwt_picker.html#a6">rubberBand</a>())
00413     {
00414         <span class="keywordflow">case</span> HLineRubberBand:
00415             label.sprintf(<span class="stringliteral">"%d"</span>, pos.y());
00416             <span class="keywordflow">break</span>;
00417         <span class="keywordflow">case</span> VLineRubberBand:
00418             label.sprintf(<span class="stringliteral">"%d"</span>, pos.x());
00419             <span class="keywordflow">break</span>;
00420         <span class="keywordflow">default</span>:
00421             label.sprintf(<span class="stringliteral">"%d, %d"</span>, pos.x(), pos.y());
00422     }
00423     <span class="keywordflow">return</span> label;
00424 }
00425 
<a name="l00437"></a><a class="code" href="class_qwt_picker.html#b13">00437</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b13">QwtPicker::drawRubberBand</a>(<span class="keyword">const</span> QRect &amp;clipRect)<span class="keyword"> const</span>
00438 <span class="keyword"></span>{
00439     QWidget *widget = (QWidget *)<a class="code" href="class_qwt_picker.html#a21">parentWidget</a>();
00440     <span class="keywordflow">if</span> ( !widget || !<a class="code" href="class_qwt_picker.html#a19">isActive</a>() || <a class="code" href="class_qwt_picker.html#a6">rubberBand</a>() == NoRubberBand || 
00441         <a class="code" href="class_qwt_picker.html#a12">rubberBandPen</a>().style() == Qt::NoPen )
00442     {
00443         <span class="keywordflow">return</span>;
00444     }
00445 
00446     <span class="keyword">const</span> QColor bg = widget-&gt;backgroundColor();
00447 
00448     QPainter painter(widget);
00449     painter.setClipRect(clipRect.isValid() ? clipRect : <a class="code" href="class_qwt_picker.html#a23">pickRect</a>());
00450     painter.setClipping(TRUE);
00451     painter.setRasterOp(XorROP);
00452 
00453     QPen pen = d_rubberBandPen;
00454     pen.setColor(QColor(bg.rgb() ^ pen.color().rgb()));
00455     painter.setPen(pen);
00456 
00457     <a class="code" href="class_qwt_picker.html#b13">drawRubberBand</a>(&amp;painter, <a class="code" href="class_qwt_picker.html#a23">pickRect</a>(), d_selection);
00458 }
00459 
<a name="l00472"></a><a class="code" href="class_qwt_picker.html#b14">00472</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b13">QwtPicker::drawRubberBand</a>(QPainter *painter,
00473     <span class="keyword">const</span> QRect &amp;pickRect, <span class="keyword">const</span> QPointArray &amp;pa)<span class="keyword"> const</span>
00474 <span class="keyword"></span>{
00475     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a6">rubberBand</a>() == NoRubberBand )
00476         <span class="keywordflow">return</span>;
00477 
00478     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a4">selectionFlags</a>() &amp; PointSelection )
00479     {
00480         <span class="keywordflow">if</span> ( pa.count() &lt; 1 )
00481             <span class="keywordflow">return</span>;
00482 
00483         <span class="keyword">const</span> QPoint pos = pa[0];
00484 
00485         <span class="keywordflow">switch</span>(<a class="code" href="class_qwt_picker.html#a6">rubberBand</a>())
00486         {
00487             <span class="keywordflow">case</span> VLineRubberBand:
00488                 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(painter, pos.x(),
00489                     pickRect.top(), pos.x(), pickRect.bottom());
00490                 <span class="keywordflow">break</span>;
00491 
00492             <span class="keywordflow">case</span> HLineRubberBand:
00493                 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(painter, pickRect.left(), 
00494                     pos.y(), pickRect.right(), pos.y());
00495                 <span class="keywordflow">break</span>;
00496 
00497             <span class="keywordflow">case</span> CrossRubberBand:
00498                 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(painter, pos.x(),
00499                     pickRect.top(), pos.x(), pickRect.bottom());
00500                 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(painter, pickRect.left(), 
00501                     pos.y(), pickRect.right(), pos.y());
00502                 <span class="keywordflow">break</span>;
00503             <span class="keywordflow">default</span>:
00504                 <span class="keywordflow">break</span>;
00505         }
00506     }
00507 
00508     <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a4">selectionFlags</a>() &amp; RectSelection )
00509     {
00510         <span class="keywordflow">if</span> ( pa.count() &lt; 2 )
00511             <span class="keywordflow">return</span>;
00512 
00513         QPoint p1 = pa[0];
00514         QPoint p2 = pa[int(pa.count() - 1)];
00515 
00516         <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a4">selectionFlags</a>() &amp; CenterToCorner )
00517         {
00518             p1.setX(p1.x() - (p2.x() - p1.x()));
00519             p1.setY(p1.y() - (p2.y() - p1.y()));
00520         }
00521         <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a4">selectionFlags</a>() &amp; CenterToRadius )
00522         {
00523             <span class="keyword">const</span> <span class="keywordtype">int</span> radius = QMAX(QABS(p2.x() - p1.x()), 
00524                 QABS(p2.y() - p1.y()));
00525             p2.setX(p1.x() + radius);
00526             p2.setY(p1.y() + radius);
00527             p1.setX(p1.x() - radius);
00528             p1.setY(p1.y() - radius);
00529         }
00530 
00531         <span class="keyword">const</span> QRect rect = QRect(p1, p2).normalize();
00532         <span class="keywordflow">switch</span>(<a class="code" href="class_qwt_picker.html#a6">rubberBand</a>())
00533         {
00534             <span class="keywordflow">case</span> EllipseRubberBand:
00535                 <a class="code" href="class_qwt_painter.html#e15">QwtPainter::drawEllipse</a>(painter, rect);
00536                 <span class="keywordflow">break</span>;
00537 
00538             <span class="keywordflow">case</span> RectRubberBand:
00539             {
00540                 <span class="comment">// In case of height == 0 or width == 0 the</span>
00541                 <span class="comment">// 2 edges erase each other in XOR mode.</span>
00542 
00543                 <span class="keywordflow">if</span> ( rect.height() &lt;= 1 )
00544                 {
00545                     <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(painter, 
00546                         rect.topLeft(), rect.topRight());
00547                 }
00548                 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( rect.width() &lt;= 1 )
00549                 {
00550                     <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(painter, 
00551                         rect.topLeft(), rect.bottomLeft());
00552                 }
00553                 <span class="keywordflow">else</span>
00554                     <a class="code" href="class_qwt_painter.html#e12">QwtPainter::drawRect</a>(painter, rect);
00555                 <span class="keywordflow">break</span>;
00556             }
00557             <span class="keywordflow">default</span>:
00558                 <span class="keywordflow">break</span>;
00559         }
00560     }
00561     <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a4">selectionFlags</a>() &amp; PolygonSelection )
00562     {
00563         <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a6">rubberBand</a>() == PolygonRubberBand )
00564             painter-&gt;drawPolyline(pa);
00565     }
00566 }
00567 
<a name="l00580"></a><a class="code" href="class_qwt_picker.html#b15">00580</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b15">QwtPicker::drawCursorLabel</a>(<span class="keyword">const</span> QRect &amp;clipRect)<span class="keyword"> const</span>
00581 <span class="keyword"></span>{
00582     QWidget *widget = (QWidget *)<a class="code" href="class_qwt_picker.html#a21">QwtPicker::parentWidget</a>();
00583     <span class="keywordflow">if</span> ( !widget )
00584         <span class="keywordflow">return</span>;
00585 
00586     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a8">cursorLabelMode</a>() == AlwaysOff || 
00587         (<a class="code" href="class_qwt_picker.html#a8">cursorLabelMode</a>() == ActiveOnly &amp;&amp; !<a class="code" href="class_qwt_picker.html#a19">isActive</a>() ) )
00588     {
00589         <span class="keywordflow">return</span>;
00590     }
00591 
00592     <span class="keywordflow">if</span> ( d_labelPosition.x() &lt; 0 || d_labelPosition.y() &lt; 0 )
00593         <span class="keywordflow">return</span>;
00594 
00595     <span class="keyword">const</span> QColor bg = widget-&gt;backgroundColor();
00596 
00597     QPainter painter(widget);
00598     painter.setClipRect(clipRect.isValid() ? clipRect : <a class="code" href="class_qwt_picker.html#a23">pickRect</a>());
00599     painter.setClipping(TRUE);
00600     painter.setRasterOp(XorROP);
00601 
00602     QPen pen = d_cursorLabelPen;
00603     pen.setColor(QColor((bg.rgb() ^ pen.color().rgb())));
00604 
00605     painter.setPen(pen);
00606     painter.setFont(d_cursorLabelFont);
00607 
00608     <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(&amp;painter, <a class="code" href="class_qwt_picker.html#a23">pickRect</a>(), d_labelPosition, d_selection);
00609 }
00610 
<a name="l00627"></a><a class="code" href="class_qwt_picker.html#b16">00627</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b15">QwtPicker::drawCursorLabel</a>(QPainter *painter, <span class="keyword">const</span> QRect &amp;pickRect,
00628         <span class="keyword">const</span> QPoint &amp;pos, <span class="keyword">const</span> QPointArray &amp;pa)<span class="keyword"> const</span>
00629 <span class="keyword"></span>{
00630     <span class="keywordtype">int</span> alignment = 0;
00631     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a19">isActive</a>() &amp;&amp; pa.count() &gt; 1 &amp;&amp; <a class="code" href="class_qwt_picker.html#a6">rubberBand</a>() != NoRubberBand )
00632     {
00633         <span class="keyword">const</span> QPoint last = pa[int(pa.count()) - 2];
00634 
00635         alignment |= (pos.x() &gt;= last.x()) ? Qt::AlignRight : Qt::AlignLeft;
00636         alignment |= (pos.y() &gt; last.y()) ? Qt::AlignBottom : Qt::AlignTop;
00637     }
00638     <span class="keywordflow">else</span>
00639         alignment = Qt::AlignTop | Qt::AlignRight;
00640 
00641     QString label = <a class="code" href="class_qwt_picker.html#b18">cursorLabel</a>(pos);
00642     <span class="keywordflow">if</span> ( !label.isEmpty() )
00643     {
00644         <a class="code" href="class_qwt_text.html">QwtText</a> *text = <a class="code" href="class_qwt_text.html#e0">QwtText::makeText</a>(label, 0, painter-&gt;font(),
00645             painter-&gt;pen().color());
00646 
00647         QRect textRect = text-&gt;<a class="code" href="class_qwt_text.html#a17">boundingRect</a>(painter);
00648 
00649         <span class="keyword">const</span> <span class="keywordtype">int</span> margin = 5;
00650 
00651         <span class="keywordtype">int</span> x = pos.x();
00652         <span class="keywordflow">if</span> ( alignment &amp; Qt::AlignLeft )
00653             x -= textRect.width() + margin;
00654         <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( alignment &amp; Qt::AlignRight )
00655             x += margin;
00656 
00657         <span class="keywordtype">int</span> y = pos.y();
00658         <span class="keywordflow">if</span> ( alignment &amp; Qt::AlignBottom )
00659             y += margin;
00660         <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( alignment &amp; Qt::AlignTop )
00661             y -= textRect.height() + margin;
00662         
00663         textRect.moveTopLeft(QPoint(x, y));
00664 
00665         <span class="keywordtype">int</span> right = QMIN(textRect.right(), pickRect.right() - margin);
00666         <span class="keywordtype">int</span> bottom = QMIN(textRect.bottom(), pickRect.bottom() - margin);
00667         textRect.moveBottomRight(QPoint(right, bottom));
00668 
00669         <span class="keywordtype">int</span> left = QMAX(textRect.left(), pickRect.left() + margin);
00670         <span class="keywordtype">int</span> top = QMAX(textRect.top(), pickRect.top() + margin);
00671         textRect.moveTopLeft(QPoint(left, top));
00672 
00673         text-&gt;<a class="code" href="class_qwt_text.html#a18">draw</a>(painter, textRect);
00674 
00675         <span class="keyword">delete</span> text;
00676     }
00677 }
00678 
<a name="l00687"></a><a class="code" href="class_qwt_picker.html#b20">00687</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b20">QwtPicker::repaint</a>(<span class="keyword">const</span> QRect &amp;rect)
00688 {
00689     QApplication::postEvent(<span class="keyword">this</span>, <span class="keyword">new</span> QPaintEvent(rect));
00690 }
00691 
<a name="l00702"></a><a class="code" href="class_qwt_picker.html#a25">00702</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_picker.html#a25">QwtPicker::event</a>(QEvent *e)
00703 {
00704     <span class="keywordflow">if</span> ( e-&gt;type() == QEvent::Paint )
00705     {
00706         <span class="keyword">const</span> QRect clipRect = ((<span class="keyword">const</span> QPaintEvent *)e)-&gt;rect();
00707 
00708         <a class="code" href="class_qwt_picker.html#b13">drawRubberBand</a>(clipRect);
00709         <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(clipRect);
00710         <span class="keywordflow">return</span> TRUE;
00711     }
00712 
00713     <span class="keywordflow">return</span> QObject::event(e);
00714 }
00715 
<a name="l00728"></a><a class="code" href="class_qwt_picker.html#a20">00728</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_picker.html#a20">QwtPicker::eventFilter</a>(QObject *o, QEvent *e)
00729 {
00730     <span class="comment">/*</span>
00731 <span class="comment">      Because of the XorROP mode the delayed paint has to</span>
00732 <span class="comment">      be completed to have a stable state for processing other</span>
00733 <span class="comment">      events. Unfortunately the internally posted paint event</span>
00734 <span class="comment">      might be too late in event queue. So we process it first.</span>
00735 <span class="comment">     */</span>
00736 
00737     QApplication::sendPostedEvents(<span class="keyword">this</span>, QEvent::Paint);
00738 
00739     <span class="keywordflow">if</span> ( o &amp;&amp; o == <a class="code" href="class_qwt_picker.html#a21">parentWidget</a>() )
00740     {
00741         <span class="keywordflow">switch</span>(e-&gt;type())
00742         {
00743             <span class="keywordflow">case</span> QEvent::Paint:
00744             {
00745                 <span class="comment">// We have to wait until the widget is updated</span>
00746                 <span class="comment">// before we can repaint cursor label and</span>
00747                 <span class="comment">// rubberband. So we post an event to delay the repaint.</span>
00748 
00749                 <span class="keyword">const</span> QPaintEvent *re = (QPaintEvent *)e;
00750                 <a class="code" href="class_qwt_picker.html#b20">repaint</a>(re-&gt;rect());
00751                 <span class="keywordflow">break</span>;
00752             }
00753             <span class="keywordflow">case</span> QEvent::Resize:
00754             {
00755                 <span class="keywordflow">if</span> ( d_resizeMode == Stretch )
00756                 {
00757                     <span class="comment">// erase</span>
00758                     <a class="code" href="class_qwt_picker.html#b13">drawRubberBand</a>();
00759                     <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>();
00760 
00761                     <span class="keyword">const</span> QResizeEvent *re = (QResizeEvent *)e;
00762                     <a class="code" href="class_qwt_picker.html#b17">stretchSelection</a>(re-&gt;oldSize(), re-&gt;size());
00763 
00764                     <span class="comment">// repaint</span>
00765                     <a class="code" href="class_qwt_picker.html#b13">drawRubberBand</a>();
00766                     <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); 
00767                 }
00768                 <span class="keywordflow">break</span>;
00769             }
00770             <span class="keywordflow">case</span> QEvent::MouseButtonPress:
00771                 <a class="code" href="class_qwt_picker.html#b6">widgetMousePressEvent</a>((QMouseEvent *)e);
00772                 <span class="keywordflow">break</span>;
00773             <span class="keywordflow">case</span> QEvent::MouseButtonRelease:
00774                 <a class="code" href="class_qwt_picker.html#b7">widgetMouseReleaseEvent</a>((QMouseEvent *)e);
00775                 <span class="keywordflow">break</span>;
00776             <span class="keywordflow">case</span> QEvent::MouseButtonDblClick:
00777                 <a class="code" href="class_qwt_picker.html#b8">widgetMouseDoubleClickEvent</a>((QMouseEvent *)e);
00778                 <span class="keywordflow">break</span>;
00779             <span class="keywordflow">case</span> QEvent::MouseMove:
00780                 <a class="code" href="class_qwt_picker.html#b9">widgetMouseMoveEvent</a>((QMouseEvent *)e);
00781                 <span class="keywordflow">break</span>;
00782             <span class="keywordflow">case</span> QEvent::KeyPress:
00783                 <a class="code" href="class_qwt_picker.html#b11">widgetKeyPressEvent</a>((QKeyEvent *)e);
00784                 <span class="keywordflow">break</span>;
00785             <span class="keywordflow">case</span> QEvent::KeyRelease:
00786                 <a class="code" href="class_qwt_picker.html#b12">widgetKeyReleaseEvent</a>((QKeyEvent *)e);
00787                 <span class="keywordflow">break</span>;
00788             <span class="keywordflow">case</span> QEvent::Wheel:
00789                 <a class="code" href="class_qwt_picker.html#b10">widgetWheelEvent</a>((QWheelEvent *)e);
00790                 <span class="keywordflow">break</span>;
00791             <span class="keywordflow">default</span>:
00792                 <span class="keywordflow">break</span>;
00793         }
00794     }
00795     <span class="keywordflow">return</span> FALSE;
00796 }
00797 
<a name="l00808"></a><a class="code" href="class_qwt_picker.html#b6">00808</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b6">QwtPicker::widgetMousePressEvent</a>(QMouseEvent *e)
00809 {
00810     <a class="code" href="class_qwt_picker.html#b1">transition</a>(e);
00811 }
00812 
<a name="l00822"></a><a class="code" href="class_qwt_picker.html#b9">00822</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b9">QwtPicker::widgetMouseMoveEvent</a>(QMouseEvent *e)
00823 {
00824     <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// erase</span>
00825 
00826     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a23">pickRect</a>().contains(e-&gt;pos()) )
00827     {
00828         d_labelPosition = e-&gt;pos();
00829         <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// Paint</span>
00830     }
00831     <span class="keywordflow">else</span>
00832         d_labelPosition = QPoint(-1, -1);
00833 
00834     <a class="code" href="class_qwt_picker.html#b1">transition</a>(e);
00835 }
00836 
<a name="l00847"></a><a class="code" href="class_qwt_picker.html#b7">00847</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b7">QwtPicker::widgetMouseReleaseEvent</a>(QMouseEvent *e)
00848 {
00849     <a class="code" href="class_qwt_picker.html#b1">transition</a>(e);
00850 }
00851 
<a name="l00861"></a><a class="code" href="class_qwt_picker.html#b8">00861</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b8">QwtPicker::widgetMouseDoubleClickEvent</a>(QMouseEvent *me)
00862 {
00863     <a class="code" href="class_qwt_picker.html#b1">transition</a>(me);
00864 }
00865     
00866 
<a name="l00876"></a><a class="code" href="class_qwt_picker.html#b10">00876</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b10">QwtPicker::widgetWheelEvent</a>(QWheelEvent *e)
00877 {
00878     <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// erase</span>
00879 
00880     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a23">pickRect</a>().contains(e-&gt;pos()) )
00881     {
00882         d_labelPosition = e-&gt;pos();
00883         <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// Paint</span>
00884     }
00885     <span class="keywordflow">else</span>
00886         d_labelPosition = QPoint(-1, -1);
00887 
00888     <a class="code" href="class_qwt_picker.html#b1">transition</a>(e);
00889 }
00890 
<a name="l00904"></a><a class="code" href="class_qwt_picker.html#b11">00904</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b11">QwtPicker::widgetKeyPressEvent</a>(QKeyEvent *ke)
00905 {
00906     <span class="keywordtype">int</span> dx = 0;
00907     <span class="keywordtype">int</span> dy = 0;
00908 
00909     <span class="keywordtype">int</span> offset = 1;
00910     <span class="keywordflow">if</span> ( ke-&gt;isAutoRepeat() )
00911         offset = 5;
00912 
00913     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_event_pattern.html#a13">keyMatch</a>(KeyLeft, ke) )
00914         dx = -offset;
00915     <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_event_pattern.html#a13">keyMatch</a>(KeyRight, ke) )
00916         dx = offset;
00917     <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_event_pattern.html#a13">keyMatch</a>(KeyUp, ke) )
00918         dy = -offset;
00919     <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_event_pattern.html#a13">keyMatch</a>(KeyDown, ke) )
00920         dy = offset;
00921     <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_event_pattern.html#a13">keyMatch</a>(KeyAbort, ke) )
00922     {
00923         <span class="keywordflow">if</span> ( d_stateMachine )
00924             d_stateMachine-&gt;<a class="code" href="class_qwt_picker_machine.html#a2">reset</a>();
00925 
00926         <span class="keywordflow">if</span> (<a class="code" href="class_qwt_picker.html#a19">isActive</a>())
00927             <a class="code" href="class_qwt_picker.html#b5">end</a>(FALSE);
00928     }
00929     <span class="keywordflow">else</span>
00930         <a class="code" href="class_qwt_picker.html#b1">transition</a>(ke);
00931 
00932     <span class="keywordflow">if</span> ( dx != 0 || dy != 0 )
00933     {
00934         <span class="keyword">const</span> QRect rect = <a class="code" href="class_qwt_picker.html#a23">pickRect</a>();
00935         <span class="keyword">const</span> QPoint pos = <a class="code" href="class_qwt_picker.html#a21">parentWidget</a>()-&gt;mapFromGlobal(QCursor::pos());
00936 
00937         <span class="keywordtype">int</span> x = pos.x() + dx;
00938         x = QMAX(rect.left(), x);
00939         x = QMIN(rect.right(), x);
00940 
00941         <span class="keywordtype">int</span> y = pos.y() + dy;
00942         y = QMAX(rect.top(), y);
00943         y = QMIN(rect.bottom(), y);
00944 
00945         QCursor::setPos(<a class="code" href="class_qwt_picker.html#a21">parentWidget</a>()-&gt;mapToGlobal(QPoint(x, y)));
00946     }
00947 }
00948  
<a name="l00958"></a><a class="code" href="class_qwt_picker.html#b12">00958</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b12">QwtPicker::widgetKeyReleaseEvent</a>(QKeyEvent *ke)
00959 {
00960     <a class="code" href="class_qwt_picker.html#b1">transition</a>(ke);
00961 }
00962 
<a name="l00970"></a><a class="code" href="class_qwt_picker.html#b1">00970</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b1">QwtPicker::transition</a>(<span class="keyword">const</span> QEvent *e)
00971 {
00972     <span class="keywordflow">if</span> ( !d_stateMachine )
00973         <span class="keywordflow">return</span>;
00974 
00975     QValueList&lt;QwtPickerMachine::Command&gt; commandList =
00976         d_stateMachine-&gt;<a class="code" href="class_qwt_picker_machine.html#a1">transition</a>(*<span class="keyword">this</span>, e);
00977 
00978     <span class="keyword">const</span> QPoint pos = <a class="code" href="class_qwt_picker.html#a21">parentWidget</a>()-&gt;mapFromGlobal(QCursor::pos());
00979 
00980     <span class="keywordflow">for</span> ( uint i = 0; i &lt; commandList.count(); i++ )
00981     {
00982         <span class="keywordflow">switch</span>(commandList[i])
00983         {
00984             <span class="keywordflow">case</span> QwtPickerMachine::Begin:
00985             {
00986                 <a class="code" href="class_qwt_picker.html#b2">begin</a>();
00987                 <span class="keywordflow">break</span>;
00988             }
00989             <span class="keywordflow">case</span> QwtPickerMachine::Append:
00990             {
00991                 <a class="code" href="class_qwt_picker.html#b3">append</a>(pos);
00992                 <span class="keywordflow">break</span>;
00993             }
00994             <span class="keywordflow">case</span> QwtPickerMachine::Move:
00995             {
00996                 <a class="code" href="class_qwt_picker.html#b4">move</a>(pos);
00997                 <span class="keywordflow">break</span>;
00998             }
00999             <span class="keywordflow">case</span> QwtPickerMachine::End:
01000             {
01001                 <a class="code" href="class_qwt_picker.html#b5">end</a>();
01002                 <span class="keywordflow">break</span>;
01003             }
01004         }
01005     }
01006 }
01007 
<a name="l01013"></a><a class="code" href="class_qwt_picker.html#b2">01013</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b2">QwtPicker::begin</a>()
01014 {
01015     <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// erase</span>
01016 
01017     d_selection.resize(0);
01018     d_isActive = TRUE;
01019 
01020     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a8">cursorLabelMode</a>() != AlwaysOff )
01021     {
01022         <span class="keywordflow">if</span> ( d_labelPosition.x() &lt; 0 || d_labelPosition.y() &lt; 0 ) 
01023         {
01024             QWidget *w = <a class="code" href="class_qwt_picker.html#a21">parentWidget</a>();
01025             <span class="keywordflow">if</span> ( w )
01026                 d_labelPosition = w-&gt;mapFromGlobal(QCursor::pos());
01027         }
01028     }
01029 
01030     <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// repaint</span>
01031     setMouseTracking(TRUE);
01032 }
01033 
<a name="l01044"></a><a class="code" href="class_qwt_picker.html#b5">01044</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_picker.html#b5">QwtPicker::end</a>(<span class="keywordtype">bool</span> ok)
01045 {
01046     <span class="keywordflow">if</span> ( d_isActive )
01047     {
01048         setMouseTracking(FALSE);
01049 
01050         <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// erase</span>
01051         <a class="code" href="class_qwt_picker.html#b13">drawRubberBand</a>(); <span class="comment">// erase</span>
01052 
01053         d_isActive = FALSE;
01054 
01055         <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// repaint</span>
01056 
01057         <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a8">cursorLabelMode</a>() == ActiveOnly )
01058             d_labelPosition = QPoint(-1, -1);
01059 
01060         <span class="keywordflow">if</span> ( ok )
01061             ok = <a class="code" href="class_qwt_picker.html#b0">accept</a>(d_selection);
01062 
01063         <span class="keywordflow">if</span> ( ok )
01064             emit <a class="code" href="class_qwt_picker.html#l0">selected</a>(d_selection);
01065         <span class="keywordflow">else</span>
01066             d_selection.resize(0);
01067     }
01068     <span class="keywordflow">else</span>
01069         ok = FALSE;
01070 
01071     <span class="keywordflow">return</span> ok;
01072 }
01073 
<a name="l01082"></a><a class="code" href="class_qwt_picker.html#b3">01082</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b3">QwtPicker::append</a>(<span class="keyword">const</span> QPoint &amp;pos)
01083 {
01084     <span class="keywordflow">if</span> ( d_isActive )
01085     {
01086         <a class="code" href="class_qwt_picker.html#b13">drawRubberBand</a>(); <span class="comment">// erase</span>
01087         <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// erase</span>
01088 
01089         <span class="keyword">const</span> <span class="keywordtype">int</span> idx = d_selection.count();
01090         d_selection.resize(idx + 1);
01091         d_selection[idx] = pos;
01092 
01093         <a class="code" href="class_qwt_picker.html#b13">drawRubberBand</a>(); <span class="comment">// repaint</span>
01094         <a class="code" href="class_qwt_picker.html#b15">drawCursorLabel</a>(); <span class="comment">// repaint</span>
01095 
01096         emit <a class="code" href="class_qwt_picker.html#l1">appended</a>(pos);
01097     }
01098 }
01099 
<a name="l01108"></a><a class="code" href="class_qwt_picker.html#b4">01108</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b4">QwtPicker::move</a>(<span class="keyword">const</span> QPoint &amp;pos)
01109 {
01110     <span class="keywordflow">if</span> ( d_isActive )
01111     {
01112         <span class="keyword">const</span> <span class="keywordtype">int</span> idx = d_selection.count() - 1;
01113         <span class="keywordflow">if</span> ( idx &gt;= 0 )
01114         {
01115             <a class="code" href="class_qwt_picker.html#b13">drawRubberBand</a>(); <span class="comment">// erase</span>
01116             d_selection[idx] = pos;
01117             <a class="code" href="class_qwt_picker.html#b13">drawRubberBand</a>(); <span class="comment">// repaint</span>
01118 
01119             emit <a class="code" href="class_qwt_picker.html#l2">moved</a>(pos);
01120         }
01121     }
01122 }
01123 
<a name="l01124"></a><a class="code" href="class_qwt_picker.html#b0">01124</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_picker.html#b0">QwtPicker::accept</a>(QPointArray &amp;)<span class="keyword"> const</span>
01125 <span class="keyword"></span>{
01126     <span class="keywordflow">return</span> TRUE;
01127 }
01128 
<a name="l01133"></a><a class="code" href="class_qwt_picker.html#a19">01133</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_picker.html#a19">QwtPicker::isActive</a>()<span class="keyword"> const </span>
01134 <span class="keyword"></span>{
01135     <span class="keywordflow">return</span> d_isActive;
01136 }
01137 
<a name="l01139"></a><a class="code" href="class_qwt_picker.html#a24">01139</a> <span class="keyword">const</span> QPointArray &amp;<a class="code" href="class_qwt_picker.html#a24">QwtPicker::selection</a>()<span class="keyword"> const</span>
01140 <span class="keyword"></span>{
01141     <span class="keywordflow">return</span> d_selection;
01142 }
01143 
<a name="l01153"></a><a class="code" href="class_qwt_picker.html#b17">01153</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_picker.html#b17">QwtPicker::stretchSelection</a>(<span class="keyword">const</span> QSize &amp;oldSize, <span class="keyword">const</span> QSize &amp;newSize)
01154 {
01155     <span class="keyword">const</span> <span class="keywordtype">double</span> xRatio =
01156         double(newSize.width()) / double(oldSize.width());
01157     <span class="keyword">const</span> <span class="keywordtype">double</span> yRatio =
01158         double(newSize.height()) / double(oldSize.height());
01159 
01160     <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i &lt; int(d_selection.count()); i++ )
01161     {
01162         QPoint &amp;p = d_selection[i];
01163         p.setX(qRound(p.x() * xRatio));
01164         p.setY(qRound(p.y() * yRatio));
01165 
01166         emit <a class="code" href="class_qwt_picker.html#l3">changed</a>(d_selection);
01167     }
01168 }
01169 
01183 <span class="keywordtype">void</span> QwtPicker::setMouseTracking(<span class="keywordtype">bool</span> enable)
01184 {
01185     QWidget *widget = <a class="code" href="class_qwt_picker.html#a21">parentWidget</a>();
01186     <span class="keywordflow">if</span> ( !widget )
01187         <span class="keywordflow">return</span>;
01188 
01189     <span class="keywordflow">if</span> ( enable )
01190     {
01191         d_mouseTracking = widget-&gt;hasMouseTracking();
01192         widget-&gt;setMouseTracking(TRUE);
01193     }
01194     <span class="keywordflow">else</span>
01195     {
01196         widget-&gt;setMouseTracking(d_mouseTracking);
01197     }
01198 }
01199 
<a name="l01205"></a><a class="code" href="class_qwt_picker.html#a23">01205</a> QRect <a class="code" href="class_qwt_picker.html#a23">QwtPicker::pickRect</a>()<span class="keyword"> const</span>
01206 <span class="keyword"></span>{
01207     QRect rect;
01208 
01209     <span class="keyword">const</span> QWidget *widget = <a class="code" href="class_qwt_picker.html#a21">parentWidget</a>();
01210     <span class="keywordflow">if</span> ( !widget )
01211         <span class="keywordflow">return</span> rect;
01212 
01213     <span class="keywordflow">if</span> ( widget-&gt;inherits(<span class="stringliteral">"QFrame"</span>) )
01214         rect = ((QFrame *)widget)-&gt;contentsRect();
01215     <span class="keywordflow">else</span>
01216         rect = widget-&gt;rect();
01217 
01218     <span class="keywordflow">return</span> rect;
01219 }
01220 
01221 <span class="comment">// Local Variables:</span>
01222 <span class="comment">// mode: C++</span>
01223 <span class="comment">// c-file-style: "stroustrup"</span>
01224 <span class="comment">// indent-tabs-mode: nil</span>
01225 <span class="comment">// End:</span>
</div></pre><hr size="1"><address style="align: right;"><small>Generated on Tue Nov 16 21:12:20 2004 for Qwt User's Guide by
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