sethLabels/glabels/FrameCd.cpp

/*  FrameCd.cpp
 *
 *  Copyright (C) 2013-2016  Jim Evins <evins@snaught.com>
 *
 *  This file is part of gLabels-qt.
 *
 *  gLabels-qt is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  gLabels-qt is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with gLabels-qt.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "FrameCd.h"

#include "Constants.h"
#include "StrUtil.h"

#include <QtDebug>


namespace glabels
{

	FrameCd::FrameCd( const Distance& r1,
			  const Distance& r2,
			  const Distance& w,
			  const Distance& h,
			  const Distance& waste,
			  const QString&  id )
		: mR1(r1), mR2(r2), mW(w), mH(h), mWaste(waste), Frame(id)
	{
		Distance wReal = (mW == 0) ? 2*mR1 : mW;
		Distance hReal = (mH == 0) ? 2*mR1 : mH;

		//
		// Create path
		//
		{
			/*
			 * Construct outer subpath (may be clipped if it's a business card CD)
			 */
			QPainterPath outerPath;
			outerPath.addEllipse( (wReal/2 - r1).pt(), (hReal/2 - r1).pt(), 2*r1.pt(), 2*r1.pt() );

			QPainterPath clipPath;
			clipPath.addRect( 0, 0, wReal.pt(), hReal.pt() );

			mPath.addPath( outerPath & clipPath );
			mPath.closeSubpath();

			/*
			 * Add inner subpath
			 */
			mPath.addEllipse( (wReal/2 - r2).pt(), (hReal/2 - r2).pt(), 2*r2.pt(), 2*r2.pt() );
		}

		//
		// Create clip path
		//
		{
			Distance r1Clip = mR1 + mWaste;
			Distance r2Clip = mR2 - mWaste;
			Distance wClip = (mW == 0) ? 2*r1Clip : mW + 2*mWaste;
			Distance hClip = (mH == 0) ? 2*r1Clip : mH + 2*mWaste;

			/*
			 * Construct outer subpath (may be clipped if it's a business card CD)
			 */
			QPainterPath outerPath;
			outerPath.addEllipse( (wReal/2 - r1Clip).pt(), (hReal/2 - r1Clip).pt(), 2*r1Clip.pt(), 2*r1Clip.pt() );

			QPainterPath clipPath;
			clipPath.addRect( -mWaste.pt(), -mWaste.pt(), wClip.pt(), hClip.pt() );

			mClipPath.addPath( outerPath & clipPath );
			mClipPath.closeSubpath();

			/*
			 * Add inner subpath
			 */
			mClipPath.addEllipse( (wReal/2 - r2Clip).pt(), (hReal/2 - r2Clip).pt(), 2*r2Clip.pt(), 2*r2Clip.pt() );
		}
	}


	FrameCd::FrameCd( const FrameCd& other )
		: mR1(other.mR1), mR2(other.mR2), mW(other.mW), mH(other.mH), mWaste(other.mWaste),
		  mPath(other.mPath), Frame(other)
	{
		// empty
	}

	
	Frame* FrameCd::dup() const
	{
		return new FrameCd( *this );
	}
	

	Distance FrameCd::w() const
	{
		return (mW == 0) ? 2*mR1 : mW;
	}

	
	Distance FrameCd::h() const
	{
		return (mH == 0) ? 2*mR1 : mH;
	}


	Distance FrameCd::r1() const
	{
		return mR1;
	}

	
	Distance FrameCd::r2() const
	{
		return mR2;
	}

	
	Distance FrameCd::waste() const
	{
		return mWaste;
	}
	

	QString FrameCd::sizeDescription( const Units& units ) const
	{
		if ( units.toEnum() == Units::IN )
		{
			QString dStr = StrUtil::formatFraction( 2 * mR1.in() );

			return QString().sprintf( "%s %s %s",
						  qPrintable(dStr),
						  qPrintable(units.toTrName()),
						  qPrintable(tr("diameter")) );
		}
		else
		{
			return QString().sprintf( "%.5g %s %s",
						  2 * mR1.inUnits(units),
						  qPrintable(units.toTrName()),
						  qPrintable(tr("diameter")) );
		}
	}


	bool FrameCd::isSimilarTo( Frame* other ) const
	{
		if ( FrameCd *otherCd = dynamic_cast<FrameCd*>(other) )
		{
			if ( (fabs( mW  - otherCd->mW )  <= EPSILON) &&
			     (fabs( mH  - otherCd->mH )  <= EPSILON) &&
			     (fabs( mR1 - otherCd->mR1 ) <= EPSILON) &&
			     (fabs( mR2 - otherCd->mR2 ) <= EPSILON) )
			{
				return true;
			}
		}
		return false;
	}


	const QPainterPath& FrameCd::path() const
	{
		return mPath;
	}
	

	const QPainterPath& FrameCd::clipPath() const
	{
		return mClipPath;
	}
	

	QPainterPath FrameCd::marginPath( const Distance& size ) const
	{
		Distance wReal = (mW == 0) ? 2*mR1 : mW;
		Distance hReal = (mH == 0) ? 2*mR1 : mH;

		Distance r1 = mR1 - size;
		Distance r2 = mR2 + size;

		QPainterPath path;

		/*
		 * Construct outer subpath (may be clipped if it's a business card CD)
		 */
		QPainterPath outerPath;
		outerPath.addEllipse( (wReal/2 - r1).pt(), (hReal/2 - r1).pt(), 2*r1.pt(), 2*r1.pt() );

		QPainterPath clipPath;
		clipPath.addRect( size.pt(), size.pt(), (wReal-2*size).pt(), (hReal-2*size).pt() );

		path.addPath( outerPath & clipPath );
		path.closeSubpath();

		/*
		 * Add inner subpath
		 */
		path.addEllipse( (wReal/2 - r2).pt(), (hReal/2 - r2).pt(), 2*r2.pt(), 2*r2.pt() );

		return path;
	}

} // namespace glabels