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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_arrow_button.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_arrow_button.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 <qpainter.h></span><a name="l00011"></a>00011 <span class="preprocessor">#include <qstyle.h></span><a name="l00012"></a>00012 <span class="preprocessor">#include <qevent.h></span><a name="l00013"></a>00013 <span class="preprocessor">#include "qwt_math.h"</span><a name="l00014"></a>00014 <span class="preprocessor">#include "qwt_polygon.h"</span><a name="l00015"></a>00015 <span class="preprocessor">#include "qwt_arrow_button.h"</span><a name="l00016"></a>00016 <a name="l00017"></a>00017 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> MaxNum = 3;<a name="l00018"></a>00018 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> Margin = 2;<a name="l00019"></a>00019 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> Spacing = 1;<a name="l00020"></a>00020 <a name="l00021"></a>00021 <span class="keyword">class </span>QwtArrowButton::PrivateData<a name="l00022"></a>00022 {<a name="l00023"></a>00023 <span class="keyword">public</span>:<a name="l00024"></a>00024 <span class="keywordtype">int</span> <a class="code" href="class_qwt_arrow_button.html#09ae0f534912a14155233d7f431ffb2e">num</a>;<a name="l00025"></a>00025 Qt::ArrowType <a class="code" href="class_qwt_arrow_button.html#0a2a1b7dfff38ef00a0495fcb61d21a4">arrowType</a>;<a name="l00026"></a>00026 };<a name="l00027"></a>00027 <a name="l00028"></a>00028 <a name="l00029"></a>00029 <span class="preprocessor">#if QT_VERSION >= 0x040000</span><a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor">#include <qstyleoption.h></span><a name="l00031"></a>00031 <span class="keyword">static</span> QStyleOptionButton styleOpt(<span class="keyword">const</span> <a class="code" href="class_qwt_arrow_button.html">QwtArrowButton</a>* btn)<a name="l00032"></a>00032 {<a name="l00033"></a>00033 QStyleOptionButton option;<a name="l00034"></a>00034 option.init(btn);<a name="l00035"></a>00035 option.features = QStyleOptionButton::None;<a name="l00036"></a>00036 <span class="keywordflow">if</span> (btn->isFlat())<a name="l00037"></a>00037 option.features |= QStyleOptionButton::Flat;<a name="l00038"></a>00038 if (btn->menu())<a name="l00039"></a>00039 option.features |= QStyleOptionButton::HasMenu;<a name="l00040"></a>00040 if (btn->autoDefault() || btn->isDefault())<a name="l00041"></a>00041 option.features |= QStyleOptionButton::AutoDefaultButton;<a name="l00042"></a>00042 if (btn->isDefault())<a name="l00043"></a>00043 option.features |= QStyleOptionButton::DefaultButton;<a name="l00044"></a>00044 if (btn->isDown())<a name="l00045"></a>00045 option.state |= QStyle::State_Sunken;<a name="l00046"></a>00046 if (!btn->isFlat() && !btn->isDown())<a name="l00047"></a>00047 option.state |= QStyle::State_Raised;<a name="l00048"></a>00048 <a name="l00049"></a>00049 <span class="keywordflow">return</span> option;<a name="l00050"></a>00050 }<a name="l00051"></a>00051 <span class="preprocessor">#endif</span><a name="l00052"></a>00052 <span class="preprocessor"></span><a name="l00058"></a><a class="code" href="class_qwt_arrow_button.html#b0ad5aefdd56db10976796be717671e9">00058</a> <a class="code" href="class_qwt_arrow_button.html#b0ad5aefdd56db10976796be717671e9">QwtArrowButton::QwtArrowButton</a>(<span class="keywordtype">int</span> <a class="code" href="class_qwt_arrow_button.html#09ae0f534912a14155233d7f431ffb2e">num</a>, <a name="l00059"></a>00059 Qt::ArrowType <a class="code" href="class_qwt_arrow_button.html#0a2a1b7dfff38ef00a0495fcb61d21a4">arrowType</a>, QWidget *parent): <a name="l00060"></a>00060 QPushButton(parent)<a name="l00061"></a>00061 {<a name="l00062"></a>00062 d_data = <span class="keyword">new</span> PrivateData;<a name="l00063"></a>00063 d_data->num = qwtLim(num, 1, MaxNum);<a name="l00064"></a>00064 d_data->arrowType = arrowType;<a name="l00065"></a>00065 <a name="l00066"></a>00066 setAutoRepeat(<span class="keyword">true</span>);<a name="l00067"></a>00067 setAutoDefault(<span class="keyword">false</span>);<a name="l00068"></a>00068 <a name="l00069"></a>00069 <span class="keywordflow">switch</span>(d_data->arrowType)<a name="l00070"></a>00070 {<a name="l00071"></a>00071 <span class="keywordflow">case</span> Qt::LeftArrow:<a name="l00072"></a>00072 <span class="keywordflow">case</span> Qt::RightArrow:<a name="l00073"></a>00073 setSizePolicy(QSizePolicy::Expanding, <a name="l00074"></a>00074 QSizePolicy::Fixed);<a name="l00075"></a>00075 <span class="keywordflow">break</span>;<a name="l00076"></a>00076 <span class="keywordflow">default</span>:<a name="l00077"></a>00077 setSizePolicy(QSizePolicy::Fixed, <a name="l00078"></a>00078 QSizePolicy::Expanding);<a name="l00079"></a>00079 }<a name="l00080"></a>00080 }<a name="l00081"></a>00081 <a name="l00083"></a><a class="code" href="class_qwt_arrow_button.html#506ab071fa7ee92928ace7dcea774a73">00083</a> <a class="code" href="class_qwt_arrow_button.html#506ab071fa7ee92928ace7dcea774a73">QwtArrowButton::~QwtArrowButton</a>()<a name="l00084"></a>00084 {<a name="l00085"></a>00085 <span class="keyword">delete</span> d_data;<a name="l00086"></a>00086 d_data = NULL;<a name="l00087"></a>00087 }<a name="l00088"></a>00088 <a name="l00092"></a><a class="code" href="class_qwt_arrow_button.html#0a2a1b7dfff38ef00a0495fcb61d21a4">00092</a> Qt::ArrowType <a class="code" href="class_qwt_arrow_button.html#0a2a1b7dfff38ef00a0495fcb61d21a4">QwtArrowButton::arrowType</a>()<span class="keyword"> const </span><a name="l00093"></a>00093 <span class="keyword"></span>{ <a name="l00094"></a>00094 <span class="keywordflow">return</span> d_data->arrowType; <a name="l00095"></a>00095 }<a name="l00096"></a>00096 <a name="l00100"></a><a class="code" href="class_qwt_arrow_button.html#09ae0f534912a14155233d7f431ffb2e">00100</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_arrow_button.html#09ae0f534912a14155233d7f431ffb2e">QwtArrowButton::num</a>()<span class="keyword"> const </span><a name="l00101"></a>00101 <span class="keyword"></span>{ <a name="l00102"></a>00102 <span class="keywordflow">return</span> d_data->num; <a name="l00103"></a>00103 }<a name="l00104"></a>00104 <a name="l00108"></a><a class="code" href="class_qwt_arrow_button.html#e32f665bfa6ab478e4ba7fd068bb3088">00108</a> QRect <a class="code" href="class_qwt_arrow_button.html#e32f665bfa6ab478e4ba7fd068bb3088">QwtArrowButton::labelRect</a>()<span class="keyword"> const</span><a name="l00109"></a>00109 <span class="keyword"></span>{<a name="l00110"></a>00110 <span class="keyword">const</span> <span class="keywordtype">int</span> m = Margin;<a name="l00111"></a>00111 <a name="l00112"></a>00112 QRect r = rect();<a name="l00113"></a>00113 r.setRect(r.x() + m, r.y() + m, <a name="l00114"></a>00114 r.width() - 2 * m, r.height() - 2 * m);<a name="l00115"></a>00115 <a name="l00116"></a>00116 <span class="keywordflow">if</span> ( isDown() )<a name="l00117"></a>00117 {<a name="l00118"></a>00118 <span class="keywordtype">int</span> ph, pv;<a name="l00119"></a>00119 <span class="preprocessor">#if QT_VERSION < 0x040000</span><a name="l00120"></a>00120 <span class="preprocessor"></span> ph = style().pixelMetric(<a name="l00121"></a>00121 QStyle::PM_ButtonShiftHorizontal, <span class="keyword">this</span>);<a name="l00122"></a>00122 pv = style().pixelMetric(<a name="l00123"></a>00123 QStyle::PM_ButtonShiftVertical, <span class="keyword">this</span>);<a name="l00124"></a>00124 r.moveBy(ph, pv);<a name="l00125"></a>00125 <span class="preprocessor">#else</span><a name="l00126"></a>00126 <span class="preprocessor"></span> QStyleOptionButton option = styleOpt(<span class="keyword">this</span>);<a name="l00127"></a>00127 ph = style()->pixelMetric(<a name="l00128"></a>00128 QStyle::PM_ButtonShiftHorizontal, &option, <span class="keyword">this</span>);<a name="l00129"></a>00129 pv = style()->pixelMetric(<a name="l00130"></a>00130 QStyle::PM_ButtonShiftVertical, &option, <span class="keyword">this</span>);<a name="l00131"></a>00131 r.translate(ph, pv);<a name="l00132"></a>00132 <span class="preprocessor">#endif</span><a name="l00133"></a>00133 <span class="preprocessor"></span> }<a name="l00134"></a>00134 <a name="l00135"></a>00135 <span class="keywordflow">return</span> r;<a name="l00136"></a>00136 }<a name="l00137"></a>00137 <a name="l00138"></a>00138 <span class="preprocessor">#if QT_VERSION >= 0x040000</span><a name="l00139"></a>00139 <span class="preprocessor"></span><a name="l00143"></a><a class="code" href="class_qwt_arrow_button.html#d9bdd4ed2e655aa19929ab436ec8ab45">00143</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_arrow_button.html#d9bdd4ed2e655aa19929ab436ec8ab45">QwtArrowButton::paintEvent</a>(QPaintEvent *event)<a name="l00144"></a>00144 {<a name="l00145"></a>00145 QPushButton::paintEvent(event);<a name="l00146"></a>00146 QPainter painter(<span class="keyword">this</span>);<a name="l00147"></a>00147 <a class="code" href="class_qwt_arrow_button.html#fc342cb3eaa01afe5aa897b3fd6aa7c2">drawButtonLabel</a>(&painter);<a name="l00148"></a>00148 }<a name="l00149"></a>00149 <span class="preprocessor">#endif</span><a name="l00150"></a>00150 <span class="preprocessor"></span><a name="l00157"></a><a class="code" href="class_qwt_arrow_button.html#fc342cb3eaa01afe5aa897b3fd6aa7c2">00157</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_arrow_button.html#fc342cb3eaa01afe5aa897b3fd6aa7c2">QwtArrowButton::drawButtonLabel</a>(QPainter *painter)<a name="l00158"></a>00158 {<a name="l00159"></a>00159 <span class="keyword">const</span> <span class="keywordtype">bool</span> isVertical = d_data->arrowType == Qt::UpArrow ||<a name="l00160"></a>00160 d_data->arrowType == Qt::DownArrow;<a name="l00161"></a>00161 <a name="l00162"></a>00162 <span class="keyword">const</span> QRect r = <a class="code" href="class_qwt_arrow_button.html#e32f665bfa6ab478e4ba7fd068bb3088">labelRect</a>();<a name="l00163"></a>00163 QSize boundingSize = <a class="code" href="class_qwt_arrow_button.html#e32f665bfa6ab478e4ba7fd068bb3088">labelRect</a>().size();<a name="l00164"></a>00164 <span class="keywordflow">if</span> ( isVertical )<a name="l00165"></a>00165 boundingSize.transpose();<a name="l00166"></a>00166 <a name="l00167"></a>00167 <span class="keyword">const</span> <span class="keywordtype">int</span> w = <a name="l00168"></a>00168 (boundingSize.width() - (MaxNum - 1) * Spacing) / MaxNum;<a name="l00169"></a>00169 <a name="l00170"></a>00170 QSize arrow = <a class="code" href="class_qwt_arrow_button.html#544fc12a1756eb2b703ab9a2903240cb">arrowSize</a>(Qt::RightArrow, <a name="l00171"></a>00171 QSize(w, boundingSize.height()));<a name="l00172"></a>00172 <a name="l00173"></a>00173 <span class="keywordflow">if</span> ( isVertical )<a name="l00174"></a>00174 arrow.transpose();<a name="l00175"></a>00175 <a name="l00176"></a>00176 QRect contentsSize; <span class="comment">// aligned rect where to paint all arrows</span><a name="l00177"></a>00177 <span class="keywordflow">if</span> ( d_data->arrowType == Qt::LeftArrow || d_data->arrowType == Qt::RightArrow )<a name="l00178"></a>00178 {⌨️ 快捷键说明
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