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Diffstat (limited to 'examples/graphicsview/portedasteroids/ledmeter.cpp')
| -rw-r--r-- | examples/graphicsview/portedasteroids/ledmeter.cpp | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/examples/graphicsview/portedasteroids/ledmeter.cpp b/examples/graphicsview/portedasteroids/ledmeter.cpp new file mode 100644 index 0000000..37aee26 --- /dev/null +++ b/examples/graphicsview/portedasteroids/ledmeter.cpp @@ -0,0 +1,161 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/* + * KAsteroids - Copyright (c) Martin R. Jones 1997 + * + * Part of the KDE project + */ + +#include <qpainter.h> +//Added by qt3to4: +#include <QResizeEvent> +#include <Q3Frame> +#include "ledmeter.h" + +KALedMeter::KALedMeter( QWidget *parent ) : Q3Frame( parent ) +{ + mCRanges.setAutoDelete( TRUE ); + mRange = 100; + mCount = 20; + mCurrentCount = 0; + mValue = 0; + setMinimumWidth( mCount * 2 + frameWidth() ); +} + +void KALedMeter::setRange( int r ) +{ + mRange = r; + if ( mRange < 1 ) + mRange = 1; + setValue( mValue ); + update(); +} + +void KALedMeter::setCount( int c ) +{ + mCount = c; + if ( mCount < 1 ) + mCount = 1; + setMinimumWidth( mCount * 2 + frameWidth() ); + calcColorRanges(); + setValue( mValue ); + update(); +} + +void KALedMeter::setValue( int v ) +{ + mValue = v; + if ( mValue > mRange ) + mValue = mRange; + else if ( mValue < 0 ) + mValue = 0; + int c = ( mValue + mRange / mCount - 1 ) * mCount / mRange; + if ( c != mCurrentCount ) + { + mCurrentCount = c; + update(); + } +} + +void KALedMeter::addColorRange( int pc, const QColor &c ) +{ + ColorRange *cr = new ColorRange; + cr->mPc = pc; + cr->mColor = c; + mCRanges.append( cr ); + calcColorRanges(); +} + +void KALedMeter::resizeEvent( QResizeEvent *e ) +{ + Q3Frame::resizeEvent( e ); + int w = ( width() - frameWidth() - 2 ) / mCount * mCount; + w += frameWidth() + 2; + setFrameRect( QRect( 0, 0, w, height() ) ); +} + +void KALedMeter::drawContents( QPainter *p ) +{ + QRect b = contentsRect(); + + unsigned cidx = 0; + int ncol = mCount; + QColor col = colorGroup().foreground(); + + if ( !mCRanges.isEmpty() ) + { + col = mCRanges.at( cidx )->mColor; + ncol = mCRanges.at( cidx )->mValue; + } + p->setBrush( col ); + p->setPen( col ); + + int lw = b.width() / mCount; + int lx = b.left() + 1; + for ( int i = 0; i < mCurrentCount; i++, lx += lw ) + { + if ( i > ncol ) + { + if ( ++cidx < mCRanges.count() ) + { + col = mCRanges.at( cidx )->mColor; + ncol = mCRanges.at( cidx )->mValue; + p->setBrush( col ); + p->setPen( col ); + } + } + + p->drawRect( lx, b.top() + 1, lw - 1, b.height() - 2 ); + } +} + +void KALedMeter::calcColorRanges() +{ + int prev = 0; + ColorRange *cr; + for ( cr = mCRanges.first(); cr; cr = mCRanges.next() ) + { + cr->mValue = prev + cr->mPc * mCount / 100; + prev = cr->mValue; + } +} + |