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<h1>qwt_arrbtn.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 <qpainter.h></span>
00011 <span class="preprocessor">#include <qstyle.h></span>
00012 <span class="preprocessor">#include <qevent.h></span>
00013 <span class="preprocessor">#include "<a class="code" href="qwt__math_8h.html">qwt_math.h</a>"</span>
00014 <span class="preprocessor">#include "qwt_arrbtn.h"</span>
00015
00016 <span class="preprocessor">#if 1</span>
00017 <span class="preprocessor"></span><span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> MaxNum = 3;
00018 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> Margin = 2;
00019 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> Spacing = 1;
00020 <span class="preprocessor">#endif</span>
00021 <span class="preprocessor"></span>
<a name="l00028"></a><a class="code" href="class_qwt_arrow_button.html#a0">00028</a> <a class="code" href="class_qwt_arrow_button.html#a0">QwtArrowButton::QwtArrowButton</a>(<span class="keywordtype">int</span> num, Qt::ArrowType arrowType,
00029 QWidget *parent, <span class="keyword">const</span> <span class="keywordtype">char</span> *name):
00030 QPushButton (parent, name),
00031 d_num(<a class="code" href="qwt__math_8h.html#a37">qwtLim</a>(num,1,MaxNum)),
00032 d_arrowType(arrowType)
00033 {
00034 <span class="comment">// We don't need a pixmap, but setting one toggles</span>
00035 <span class="comment">// QPushButton in pixmap mode what removes text</span>
00036 <span class="comment">// related properties from thy style engines.</span>
00037
00038 setPixmap(QPixmap());
00039 setAutoRepeat(TRUE);
00040 setAutoDefault(FALSE);
00041 }
00042
<a name="l00046"></a><a class="code" href="class_qwt_arrow_button.html#a1">00046</a> Qt::ArrowType <a class="code" href="class_qwt_arrow_button.html#a1">QwtArrowButton::arrowType</a>()<span class="keyword"> const </span>
00047 <span class="keyword"></span>{
00048 <span class="keywordflow">return</span> d_arrowType;
00049 }
00050
<a name="l00054"></a><a class="code" href="class_qwt_arrow_button.html#a2">00054</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_arrow_button.html#a2">QwtArrowButton::num</a>()<span class="keyword"> const </span>
00055 <span class="keyword"></span>{
00056 <span class="keywordflow">return</span> d_num;
00057 }
00058
<a name="l00062"></a><a class="code" href="class_qwt_arrow_button.html#b2">00062</a> QRect <a class="code" href="class_qwt_arrow_button.html#b2">QwtArrowButton::labelRect</a>()<span class="keyword"> const</span>
00063 <span class="keyword"></span>{
00064 QRect r =
00065 <span class="preprocessor">#if QT_VERSION < 300</span>
00066 <span class="preprocessor"></span> style().buttonRect(rect().x(), rect().y(),
00067 rect().width(), rect().height());
00068 <span class="preprocessor">#else</span>
00069 <span class="preprocessor"></span> style().subRect(QStyle::SR_PushButtonContents, <span class="keyword">this</span>);
00070 <span class="preprocessor">#endif</span>
00071 <span class="preprocessor"></span>
00072 r.setRect(r.x() + Margin, r.y() + Margin,
00073 r.width() - 2 * Margin, r.height() - 2 * Margin);
00074
00075 <span class="keywordflow">if</span> ( isDown() )
00076 {
00077 <span class="keywordtype">int</span> ph, pv;
00078 <span class="preprocessor">#if QT_VERSION < 300</span>
00079 <span class="preprocessor"></span> style().getButtonShift(ph, pv);
00080 <span class="preprocessor">#else</span>
00081 <span class="preprocessor"></span> ph = style().pixelMetric(
00082 QStyle::PM_ButtonShiftHorizontal, <span class="keyword">this</span>);
00083 pv = style().pixelMetric(
00084 QStyle::PM_ButtonShiftVertical, <span class="keyword">this</span>);
00085 <span class="preprocessor">#endif</span>
00086 <span class="preprocessor"></span> r.moveBy(ph, pv);
00087 }
00088
00089 <span class="keywordflow">return</span> r;
00090 }
00091
<a name="l00096"></a><a class="code" href="class_qwt_arrow_button.html#b0">00096</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_arrow_button.html#b0">QwtArrowButton::drawButtonLabel</a>(QPainter *p)
00097 {
00098 <span class="keyword">const</span> QRect r = <a class="code" href="class_qwt_arrow_button.html#b2">labelRect</a>();
00099
00100 QSize boundingSize = <a class="code" href="class_qwt_arrow_button.html#b2">labelRect</a>().size();
00101 <span class="keywordflow">if</span> ( d_arrowType == Qt::UpArrow || d_arrowType == Qt::DownArrow )
00102 boundingSize.transpose();
00103
00104 <span class="keyword">const</span> <span class="keywordtype">int</span> w = (boundingSize.width() - (MaxNum - 1) * Spacing) / MaxNum;
00105
00106 QSize arrow = <a class="code" href="class_qwt_arrow_button.html#b3">arrowSize</a>(Qt::RightArrow,
00107 QSize(w, boundingSize.height()));
00108
00109 <span class="keywordflow">if</span> ( d_arrowType == Qt::UpArrow || d_arrowType == Qt::DownArrow )
00110 arrow.transpose();
00111
00112 QRect contentsSize; <span class="comment">// aligned rect where to paint all arrows</span>
00113 <span class="keywordflow">if</span> ( d_arrowType == Qt::LeftArrow || d_arrowType == Qt::RightArrow )
00114 {
00115 contentsSize.setWidth(d_num * arrow.width()
00116 + (d_num - 1) * Spacing);
00117 contentsSize.setHeight(arrow.height());
00118 }
00119 <span class="keywordflow">else</span>
00120 {
00121 contentsSize.setWidth(arrow.width());
00122 contentsSize.setHeight(d_num * arrow.height()
00123 + (d_num - 1) * Spacing);
00124 }
00125
00126 QRect arrowRect(contentsSize);
00127 arrowRect.moveCenter(r.center());
00128 arrowRect.setSize(arrow);
00129
00130 p->save();
00131 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < d_num; i++)
00132 {
00133 <a class="code" href="class_qwt_arrow_button.html#b1">drawArrow</a>(p, arrowRect, d_arrowType);
00134
00135 <span class="keywordflow">if</span> ( d_arrowType == Qt::LeftArrow || d_arrowType == Qt::RightArrow )
00136 arrowRect.moveBy(arrow.width() + Spacing, 0);
00137 <span class="keywordflow">else</span>
00138 arrowRect.moveBy(0, arrow.height() + Spacing);
00139 }
00140 p->restore();
00141
00142 <span class="preprocessor">#if QT_VERSION >= 300</span>
00143 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( hasFocus() )
00144 {
00145 <span class="keyword">const</span> QRect focusRect =
00146 style().subRect(QStyle::SR_PushButtonFocusRect, <span class="keyword">this</span>);
00147 style().drawPrimitive(QStyle::PE_FocusRect, p,
00148 focusRect, colorGroup());
00149 }
00150 <span class="preprocessor">#endif</span>
00151 <span class="preprocessor"></span>}
00152
<a name="l00160"></a><a class="code" href="class_qwt_arrow_button.html#b1">00160</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_arrow_button.html#b1">QwtArrowButton::drawArrow</a>(QPainter *p,
00161 <span class="keyword">const</span> QRect &r, Qt::ArrowType arrowType)<span class="keyword"> const </span>
00162 <span class="keyword"></span>{
00163 QPointArray pa(3);
00164
00165 <span class="keywordflow">switch</span>(arrowType)
00166 {
00167 <span class="keywordflow">case</span> Qt::UpArrow:
00168 pa.setPoint(0, r.bottomLeft());
00169 pa.setPoint(1, r.bottomRight());
00170 pa.setPoint(2, r.center().x(), r.top());
00171 <span class="keywordflow">break</span>;
00172 <span class="keywordflow">case</span> Qt::DownArrow:
00173 pa.setPoint(0, r.topLeft());
00174 pa.setPoint(1, r.topRight());
00175 pa.setPoint(2, r.center().x(), r.bottom());
00176 <span class="keywordflow">break</span>;
00177 <span class="keywordflow">case</span> Qt::RightArrow:
00178 pa.setPoint(0, r.topLeft());
00179 pa.setPoint(1, r.bottomLeft());
00180 pa.setPoint(2, r.right(), r.center().y());
00181 <span class="keywordflow">break</span>;
00182 <span class="keywordflow">case</span> Qt::LeftArrow:
00183 pa.setPoint(0, r.topRight());
00184 pa.setPoint(1, r.bottomRight());
00185 pa.setPoint(2, r.left(), r.center().y());
00186 <span class="keywordflow">break</span>;
00187 }
00188
00189 p->setPen(colorGroup().buttonText());
00190 p->setBrush(colorGroup().brush(QColorGroup::ButtonText));
00191 p->drawPolygon(pa);
00192 }
00193
00194
<a name="l00198"></a><a class="code" href="class_qwt_arrow_button.html#a5">00198</a> QSizePolicy <a class="code" href="class_qwt_arrow_button.html#a5">QwtArrowButton::sizePolicy</a>()<span class="keyword"> const</span>
00199 <span class="keyword"></span>{
00200 QSizePolicy policy;
00201 <span class="keywordflow">if</span> ( d_arrowType == Qt::LeftArrow || d_arrowType == Qt::RightArrow )
00202 policy = QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
00203 <span class="keywordflow">else</span>
00204 policy = QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
00205
00206 <span class="keywordflow">return</span> policy;
00207 }
00208
<a name="l00212"></a><a class="code" href="class_qwt_arrow_button.html#a3">00212</a> QSize <a class="code" href="class_qwt_arrow_button.html#a3">QwtArrowButton::sizeHint</a>()<span class="keyword"> const</span>
00213 <span class="keyword"></span>{
00214 <span class="keywordflow">return</span> <a class="code" href="class_qwt_arrow_button.html#a4">minimumSizeHint</a>();
00215 }
00216
<a name="l00220"></a><a class="code" href="class_qwt_arrow_button.html#a4">00220</a> QSize <a class="code" href="class_qwt_arrow_button.html#a4">QwtArrowButton::minimumSizeHint</a>()<span class="keyword"> const</span>
00221 <span class="keyword"></span>{
00222 <span class="keyword">const</span> QSize asz = <a class="code" href="class_qwt_arrow_button.html#b3">arrowSize</a>(Qt::RightArrow, QSize());
00223
00224 QSize sz(
00225 2 * Margin + (MaxNum - 1) * Spacing + MaxNum * asz.width(),
00226 2 * Margin + asz.height()
00227 );
00228
00229 <span class="keywordflow">if</span> ( d_arrowType == Qt::UpArrow || d_arrowType == Qt::DownArrow )
00230 sz.transpose();
00231
00232 <span class="preprocessor">#if QT_VERSION < 300</span>
00233 <span class="preprocessor"></span> <span class="keywordtype">int</span> bm = style().buttonMargin() - 1;
00234 sz += QSize(2 * bm, 2 * bm);
00235 <span class="preprocessor">#else</span>
00236 <span class="preprocessor"></span> sz = style().sizeFromContents(QStyle::CT_PushButton, <span class="keyword">this</span>, sz);
00237 <span class="preprocessor">#endif</span>
00238 <span class="preprocessor"></span> <span class="keywordflow">return</span> sz;
00239 }
00240
<a name="l00248"></a><a class="code" href="class_qwt_arrow_button.html#b3">00248</a> QSize <a class="code" href="class_qwt_arrow_button.html#b3">QwtArrowButton::arrowSize</a>(Qt::ArrowType arrowType,
00249 <span class="keyword">const</span> QSize &boundingSize)<span class="keyword"> const</span>
00250 <span class="keyword"></span>{
00251 QSize bs = boundingSize;
00252 <span class="keywordflow">if</span> ( arrowType == Qt::UpArrow || arrowType == Qt::DownArrow )
00253 bs.transpose();
00254
00255 <span class="keyword">const</span> <span class="keywordtype">int</span> MinLen = 2;
00256 <span class="keyword">const</span> QSize sz = bs.expandedTo(
00257 QSize(MinLen, 2 * MinLen - 1)); <span class="comment">// minimum</span>
00258
00259 <span class="keywordtype">int</span> w = sz.width();
00260 <span class="keywordtype">int</span> h = 2 * w - 1;
00261
00262 <span class="keywordflow">if</span> ( h > sz.height() )
00263 {
00264 h = sz.height();
00265 w = (h + 1) / 2;
00266 }
00267
00268 QSize arrSize(w, h);
00269 <span class="keywordflow">if</span> ( arrowType == Qt::UpArrow || arrowType == Qt::DownArrow )
00270 arrSize.transpose();
00271
00272 <span class="keywordflow">return</span> arrSize;
00273 }
00274
<a name="l00278"></a><a class="code" href="class_qwt_arrow_button.html#b4">00278</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_arrow_button.html#b4">QwtArrowButton::keyPressEvent</a>(QKeyEvent *e)
00279 {
00280 <span class="keywordflow">if</span> ( e->isAutoRepeat() && e->key() == Qt::Key_Space )
00281 emit clicked();
00282
00283 QPushButton::keyPressEvent(e);
00284 }
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