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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Qwt User's Guide: qwt_picker.cpp Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.6 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="classes.html"><span>Classes</span></a></li> <li id="current"><a href="files.html"><span>Files</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> </ul></div><h1>qwt_picker.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</span><a name="l00002"></a>00002 <span class="comment"> * Qwt Widget Library</span><a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 1997 Josef Wilgen</span><a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 2002 Uwe Rathmann</span><a name="l00005"></a>00005 <span class="comment"> *</span><a name="l00006"></a>00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span><a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span><a name="l00008"></a>00008 <span class="comment"> *****************************************************************************/</span><a name="l00009"></a>00009 <a name="l00010"></a>00010 <span class="preprocessor">#include <qapplication.h></span><a name="l00011"></a>00011 <span class="preprocessor">#include <qevent.h></span><a name="l00012"></a>00012 <span class="preprocessor">#include <qpainter.h></span><a name="l00013"></a>00013 <span class="preprocessor">#include <qframe.h></span><a name="l00014"></a>00014 <span class="preprocessor">#include <qcursor.h></span><a name="l00015"></a>00015 <span class="preprocessor">#include <qbitmap.h></span><a name="l00016"></a>00016 <span class="preprocessor">#include "qwt_math.h"</span><a name="l00017"></a>00017 <span class="preprocessor">#include "qwt_painter.h"</span><a name="l00018"></a>00018 <span class="preprocessor">#include "qwt_picker_machine.h"</span><a name="l00019"></a>00019 <span class="preprocessor">#include "qwt_picker.h"</span><a name="l00020"></a>00020 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#include <qguardedptr.h></span><a name="l00022"></a>00022 <span class="preprocessor">#else</span><a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#include <qpointer.h></span><a name="l00024"></a>00024 <span class="preprocessor">#endif</span><a name="l00025"></a>00025 <span class="preprocessor"></span><a name="l00026"></a>00026 <span class="keyword">class </span>QwtPicker::PrivateData<a name="l00027"></a>00027 {<a name="l00028"></a>00028 <span class="keyword">public</span>:<a name="l00029"></a>00029 <span class="keyword">class </span>PickerWidget: <span class="keyword">public</span> QWidget<a name="l00030"></a>00030 {<a name="l00031"></a>00031 <span class="keyword">public</span>:<a name="l00032"></a>00032 <span class="keyword">enum</span> Type<a name="l00033"></a>00033 {<a name="l00034"></a>00034 <a class="code" href="class_qwt_picker.html#b36c79d8ff20aba5b778d2823c1f7894">RubberBand</a>,<a name="l00035"></a>00035 Text<a name="l00036"></a>00036 };<a name="l00037"></a>00037 PickerWidget(<a class="code" href="class_qwt_picker.html">QwtPicker</a> *, QWidget *, Type);<a name="l00038"></a>00038 <span class="keyword">virtual</span> <span class="keywordtype">void</span> updateMask();<a name="l00039"></a>00039 <a name="l00040"></a>00040 <span class="keyword">protected</span>:<a name="l00041"></a>00041 <span class="keyword">virtual</span> <span class="keywordtype">void</span> paintEvent(QPaintEvent *);<a name="l00042"></a>00042 <a name="l00043"></a>00043 <a class="code" href="class_qwt_picker.html">QwtPicker</a> *d_picker;<a name="l00044"></a>00044 Type d_type;<a name="l00045"></a>00045 };<a name="l00046"></a>00046 <a name="l00047"></a>00047 <span class="keywordtype">bool</span> enabled;<a name="l00048"></a>00048 <a name="l00049"></a>00049 <a class="code" href="class_qwt_picker_machine.html">QwtPickerMachine</a> *<a class="code" href="class_qwt_picker.html#aad63b94d03f8ebb363ed51d7c2a0dd2">stateMachine</a>;<a name="l00050"></a>00050 <a name="l00051"></a>00051 <span class="keywordtype">int</span> <a class="code" href="class_qwt_picker.html#d8e6fc50cd841e543a359c099024c448">selectionFlags</a>;<a name="l00052"></a>00052 <a class="code" href="class_qwt_picker.html#b3c894deed026f392496dd07809a6fd3">QwtPicker::ResizeMode</a> <a class="code" href="class_qwt_picker.html#684032c8aea570b069da2f8193760df9">resizeMode</a>;<a name="l00053"></a>00053 <a name="l00054"></a>00054 <a class="code" href="class_qwt_picker.html#b36c79d8ff20aba5b778d2823c1f7894">QwtPicker::RubberBand</a> <a class="code" href="class_qwt_picker.html#6a7af18636587af2c11a6c060929403a">rubberBand</a>;<a name="l00055"></a>00055 QPen <a class="code" href="class_qwt_picker.html#074492301e00535def0fe2cb449fba37">rubberBandPen</a>;<a name="l00056"></a>00056 <a name="l00057"></a>00057 <a class="code" href="class_qwt_picker.html#01be4d404ffc3a7b238b0d0aaeb66b93">QwtPicker::DisplayMode</a> <a class="code" href="class_qwt_picker.html#0647370ed08612d2a55742dc00f6acb7">trackerMode</a>;<a name="l00058"></a>00058 QPen <a class="code" href="class_qwt_picker.html#a45bf8a52ea95bdf63e2225ec7fa8063">trackerPen</a>;<a name="l00059"></a>00059 QFont <a class="code" href="class_qwt_picker.html#e87b2ac560d8795a302ee00c0ff0ab3d">trackerFont</a>;<a name="l00060"></a>00060 <a name="l00061"></a>00061 QwtPolygon <a class="code" href="class_qwt_picker.html#c1eb6aa4b264116ac7411ae799862676">selection</a>;<a name="l00062"></a>00062 <span class="keywordtype">bool</span> <a class="code" href="class_qwt_picker.html#f825f383c74928d1541f139e102983f9">isActive</a>;<a name="l00063"></a>00063 QPoint labelPosition;<a name="l00064"></a>00064 <a name="l00065"></a>00065 <span class="keywordtype">bool</span> mouseTracking; <span class="comment">// used to save previous value</span><a name="l00066"></a>00066 <a name="l00067"></a>00067 <span class="comment">/*</span><a name="l00068"></a>00068 <span class="comment"> On X11 the widget below the picker widgets gets paint events</span><a name="l00069"></a>00069 <span class="comment"> with a region that is the bounding rect of the mask, if it is complex.</span><a name="l00070"></a>00070 <span class="comment"> In case of (f.e) a CrossRubberBand and a text this creates complete</span><a name="l00071"></a>00071 <span class="comment"> repaints of the widget. So we better use two different widgets.</span><a name="l00072"></a>00072 <span class="comment"> */</span><a name="l00073"></a>00073 <a name="l00074"></a>00074 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00075"></a>00075 <span class="preprocessor"></span> QGuardedPtr<PickerWidget> <a class="code" href="class_qwt_picker.html#a13f79148c53b9aec63f14b62ccc98cb">rubberBandWidget</a>;<a name="l00076"></a>00076 QGuardedPtr<PickerWidget> <a class="code" href="class_qwt_picker.html#5eb014068d91e1b26a937fc90b035efc">trackerWidget</a>;<a name="l00077"></a>00077 <span class="preprocessor">#else</span><a name="l00078"></a>00078 <span class="preprocessor"></span> QPointer<PickerWidget> <a class="code" href="class_qwt_picker.html#a13f79148c53b9aec63f14b62ccc98cb">rubberBandWidget</a>;<a name="l00079"></a>00079 QPointer<PickerWidget> <a class="code" href="class_qwt_picker.html#5eb014068d91e1b26a937fc90b035efc">trackerWidget</a>;<a name="l00080"></a>00080 <span class="preprocessor">#endif</span><a name="l00081"></a>00081 <span class="preprocessor"></span>};<a name="l00082"></a>00082 <a name="l00083"></a>00083 QwtPicker::PrivateData::PickerWidget::PickerWidget(<a name="l00084"></a>00084 <a class="code" href="class_qwt_picker.html">QwtPicker</a> *picker, QWidget *parent, Type type):<a name="l00085"></a>00085 QWidget(parent),<a name="l00086"></a>00086 d_picker(picker),<a name="l00087"></a>00087 d_type(type)<a name="l00088"></a>00088 {<a name="l00089"></a>00089 <span class="preprocessor">#if QT_VERSION >= 0x040000</span><a name="l00090"></a>00090 <span class="preprocessor"></span> setAttribute(Qt::WA_TransparentForMouseEvents);<a name="l00091"></a>00091 setAttribute(Qt::WA_NoSystemBackground);<a name="l00092"></a>00092 <span class="preprocessor">#if 0</span><a name="l00093"></a>00093 <span class="preprocessor"></span> setAttribute(Qt::WA_PaintOnScreen);<a name="l00094"></a>00094 <span class="preprocessor">#endif</span><a name="l00095"></a>00095 <span class="preprocessor"></span> setFocusPolicy(Qt::NoFocus);<a name="l00096"></a>00096 <span class="preprocessor">#else</span><a name="l00097"></a>00097 <span class="preprocessor"></span> setBackgroundMode(Qt::NoBackground);<a name="l00098"></a>00098 setFocusPolicy(QWidget::NoFocus);<a name="l00099"></a>00099 setMouseTracking(<span class="keyword">true</span>);<a name="l00100"></a>00100 <span class="preprocessor">#endif</span><a name="l00101"></a>00101 <span class="preprocessor"></span> hide();<a name="l00102"></a>00102 }<a name="l00103"></a>00103 <a name="l00104"></a>00104 <span class="keywordtype">void</span> QwtPicker::PrivateData::PickerWidget::updateMask()<a name="l00105"></a>00105 {<a name="l00106"></a>00106 QBitmap bm(width(), height());<a name="l00107"></a>00107 bm.fill(Qt::color0);<a name="l00108"></a>00108 <a name="l00109"></a>00109 QPainter painter(&bm);<a name="l00110"></a>00110 <a name="l00111"></a>00111 <span class="keywordflow">if</span> ( d_type == RubberBand )<a name="l00112"></a>00112 {<a name="l00113"></a>00113 QPen pen = d_picker->rubberBandPen();<a name="l00114"></a>00114 pen.setColor(Qt::color1);<a name="l00115"></a>00115 painter.setPen(pen);<a name="l00116"></a>00116 <a name="l00117"></a>00117 d_picker->drawRubberBand(&painter);<a name="l00118"></a>00118 }<a name="l00119"></a>00119 <span class="keywordflow">if</span> ( d_type == Text )<a name="l00120"></a>00120 {<a name="l00121"></a>00121 QPen pen = d_picker->trackerPen();<a name="l00122"></a>00122 pen.setColor(Qt::color1);<a name="l00123"></a>00123 painter.setPen(pen);<a name="l00124"></a>00124 <a name="l00125"></a>00125 d_picker->drawTracker(&painter);<a name="l00126"></a>00126 }<a name="l00127"></a>00127 <a name="l00128"></a>00128 painter.end();<a name="l00129"></a>00129 <a name="l00130"></a>00130 <a name="l00131"></a>00131 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00132"></a>00132 <span class="preprocessor"></span> QWidget *w = parentWidget();<a name="l00133"></a>00133 <span class="keyword">const</span> <span class="keywordtype">bool</span> doUpdate = w->isUpdatesEnabled();<a name="l00134"></a>00134 <span class="keyword">const</span> Qt::BackgroundMode bgMode = w->backgroundMode();<a name="l00135"></a>00135 w->setUpdatesEnabled(<span class="keyword">false</span>);<a name="l00136"></a>00136 <span class="keywordflow">if</span> ( bgMode != Qt::NoBackground )⌨️ 快捷键说明
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