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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">ledmeter.cpp Example File</h1> <span class="small-subtitle">graphicsview/portedasteroids/ledmeter.cpp</span> <!-- $$$graphicsview/portedasteroids/ledmeter.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names ** of its contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="comment">/* * KAsteroids - Copyright (c) Martin R. Jones 1997 * * Part of the KDE project */</span> <span class="preprocessor">#include <QPainter></span> <span class="preprocessor">#include <QResizeEvent></span> <span class="preprocessor">#include <QFrame></span> <span class="preprocessor">#include <QColorGroup></span> <span class="preprocessor">#include "ledmeter.h"</span> KALedMeter<span class="operator">::</span>KALedMeter( <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent ) : <span class="type"><a href="qframe.html">QFrame</a></span>( parent ) { mRange <span class="operator">=</span> <span class="number">100</span>; mCount <span class="operator">=</span> <span class="number">20</span>; mCurrentCount <span class="operator">=</span> <span class="number">0</span>; mValue <span class="operator">=</span> <span class="number">0</span>; setMinimumWidth( mCount <span class="operator">*</span> <span class="number">2</span> <span class="operator">+</span> frameWidth() ); } KALedMeter<span class="operator">::</span><span class="operator">~</span>KALedMeter() { <a href="qtalgorithms.html#qDeleteAll">qDeleteAll</a>(mCRanges); mCRanges<span class="operator">.</span>clear(); } <span class="type">void</span> KALedMeter<span class="operator">::</span>setRange( <span class="type">int</span> r ) { mRange <span class="operator">=</span> r; <span class="keyword">if</span> ( mRange <span class="operator"><</span> <span class="number">1</span> ) mRange <span class="operator">=</span> <span class="number">1</span>; setValue( mValue ); update(); } <span class="type">void</span> KALedMeter<span class="operator">::</span>setCount( <span class="type">int</span> c ) { mCount <span class="operator">=</span> c; <span class="keyword">if</span> ( mCount <span class="operator"><</span> <span class="number">1</span> ) mCount <span class="operator">=</span> <span class="number">1</span>; setMinimumWidth( mCount <span class="operator">*</span> <span class="number">2</span> <span class="operator">+</span> frameWidth() ); calcColorRanges(); setValue( mValue ); update(); } <span class="type">void</span> KALedMeter<span class="operator">::</span>setValue( <span class="type">int</span> v ) { mValue <span class="operator">=</span> v; <span class="keyword">if</span> ( mValue <span class="operator">></span> mRange ) mValue <span class="operator">=</span> mRange; <span class="keyword">else</span> <span class="keyword">if</span> ( mValue <span class="operator"><</span> <span class="number">0</span> ) mValue <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> c <span class="operator">=</span> ( mValue <span class="operator">+</span> mRange <span class="operator">/</span> mCount <span class="operator">-</span> <span class="number">1</span> ) <span class="operator">*</span> mCount <span class="operator">/</span> mRange; <span class="keyword">if</span> ( c <span class="operator">!</span><span class="operator">=</span> mCurrentCount ) { mCurrentCount <span class="operator">=</span> c; update(); } } <span class="type">void</span> KALedMeter<span class="operator">::</span>addColorRange( <span class="type">int</span> pc<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qcolor.html">QColor</a></span> <span class="operator">&</span>c ) { ColorRange <span class="operator">*</span>cr <span class="operator">=</span> <span class="keyword">new</span> ColorRange; cr<span class="operator">-</span><span class="operator">></span>mPc <span class="operator">=</span> pc; cr<span class="operator">-</span><span class="operator">></span>mColor <span class="operator">=</span> c; mCRanges<span class="operator">.</span>append( cr ); calcColorRanges(); } <span class="type">void</span> KALedMeter<span class="operator">::</span>resizeEvent( <span class="type"><a href="qresizeevent.html">QResizeEvent</a></span> <span class="operator">*</span>e ) { <span class="type"><a href="qframe.html">QFrame</a></span><span class="operator">::</span>resizeEvent( e ); <span class="type">int</span> w <span class="operator">=</span> ( width() <span class="operator">-</span> frameWidth() <span class="operator">-</span> <span class="number">2</span> ) <span class="operator">/</span> mCount <span class="operator">*</span> mCount; w <span class="operator">+</span><span class="operator">=</span> frameWidth() <span class="operator">+</span> <span class="number">2</span>; setFrameRect( <span class="type"><a href="qrect.html">QRect</a></span>( <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> w<span class="operator">,</span> height() ) ); } <span class="type">void</span> KALedMeter<span class="operator">::</span>paintEvent(<span class="type"><a href="qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>event) { <span class="type"><a href="qframe.html">QFrame</a></span><span class="operator">::</span>paintEvent(event); <span class="type"><a href="qrect.html">QRect</a></span> b <span class="operator">=</span> contentsRect(); <span class="type"><a href="qpainter.html">QPainter</a></span> p(<span class="keyword">this</span>); <span class="type">unsigned</span> cidx <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> ncol <span class="operator">=</span> mCount; <span class="type"><a href="qcolor.html">QColor</a></span> col <span class="operator">=</span> palette()<span class="operator">.</span>foreground()<span class="operator">.</span>color(); <span class="keyword">if</span> ( <span class="operator">!</span>mCRanges<span class="operator">.</span>isEmpty() ) { col <span class="operator">=</span> mCRanges<span class="operator">.</span>at( cidx )<span class="operator">-</span><span class="operator">></span>mColor; ncol <span class="operator">=</span> mCRanges<span class="operator">.</span>at( cidx )<span class="operator">-</span><span class="operator">></span>mValue; } p<span class="operator">.</span>setBrush( col ); p<span class="operator">.</span>setPen( col ); <span class="type">int</span> lw <span class="operator">=</span> b<span class="operator">.</span>width() <span class="operator">/</span> mCount; <span class="type">int</span> lx <span class="operator">=</span> b<span class="operator">.</span>left() <span class="operator">+</span> <span class="number">1</span>; <span class="keyword">for</span> ( <span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> mCurrentCount; i<span class="operator">+</span><span class="operator">+</span><span class="operator">,</span> lx <span class="operator">+</span><span class="operator">=</span> lw ) { <span class="keyword">if</span> ( i <span class="operator">></span> ncol ) { <span class="keyword">if</span> ( <span class="operator">+</span><span class="operator">+</span>cidx <span class="operator"><</span> mCRanges<span class="operator">.</span>count() ) { col <span class="operator">=</span> mCRanges<span class="operator">.</span>at( cidx )<span class="operator">-</span><span class="operator">></span>mColor; ncol <span class="operator">=</span> mCRanges<span class="operator">.</span>at( cidx )<span class="operator">-</span><span class="operator">></span>mValue; p<span class="operator">.</span>setBrush( col ); p<span class="operator">.</span>setPen( col ); } } p<span class="operator">.</span>drawRect( lx<span class="operator">,</span> b<span class="operator">.</span>top() <span class="operator">+</span> <span class="number">1</span><span class="operator">,</span> lw <span class="operator">-</span> <span class="number">1</span><span class="operator">,</span> b<span class="operator">.</span>height() <span class="operator">-</span> <span class="number">2</span> ); } } <span class="type">void</span> KALedMeter<span class="operator">::</span>calcColorRanges() { <span class="type">int</span> prev <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">for</span>(<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span>ColorRange<span class="operator">*</span><span class="operator">></span><span class="operator">::</span>iterator it <span class="operator">=</span> mCRanges<span class="operator">.</span>begin(); it <span class="operator">!</span><span class="operator">=</span> mCRanges<span class="operator">.</span>end(); it<span class="operator">+</span><span class="operator">+</span>) { ColorRange <span class="operator">*</span>cr <span class="operator">=</span> <span class="operator">*</span>it; cr<span class="operator">-</span><span class="operator">></span>mValue <span class="operator">=</span> prev <span class="operator">+</span> cr<span class="operator">-</span><span class="operator">></span>mPc <span class="operator">*</span> mCount <span class="operator">/</span> <span class="number">100</span>; prev <span class="operator">=</span> cr<span class="operator">-</span><span class="operator">></span>mValue; } }</pre> </div> <!-- @@@graphicsview/portedasteroids/ledmeter.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. 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