sethLabels/model/ModelEllipseObject.cpp

/*  ModelEllipseObject.cpp
 *
 *  Copyright (C) 2013-2016  Jaye 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 "ModelEllipseObject.h"

#include <QBrush>
#include <QPen>


namespace glabels
{
	namespace model
	{

		//
		// Private
		//
		namespace
		{
			const double slopPixels = 2;
		}


		///
		/// Constructor
		///
		ModelEllipseObject::ModelEllipseObject()
		{
			// empty
		}


		///
		/// Constructor
		///
		ModelEllipseObject::ModelEllipseObject( Distance          x0,
		                                        Distance          y0,
		                                        Distance          w,
		                                        Distance          h,
		                                        bool              lockAspectRatio,
		                                        Distance          lineWidth,
		                                        const ColorNode&  lineColorNode,
		                                        const ColorNode&  fillColorNode,
		                                        const QTransform& matrix,
		                                        bool              shadowState,
		                                        Distance          shadowX,
		                                        Distance          shadowY,
		                                        double            shadowOpacity,
		                                        const ColorNode&  shadowColorNode )
		: ModelShapeObject( x0,
		                    y0,
		                    w,
		                    h,
		                    lockAspectRatio,
		                    lineWidth,
		                    lineColorNode,
		                    fillColorNode,
		                    matrix,
		                    shadowState,
		                    shadowX,
		                    shadowY,
		                    shadowOpacity,
		                    shadowColorNode )
		{
			// empty
		}


		///
		/// Copy constructor
		///
		ModelEllipseObject::ModelEllipseObject( const ModelEllipseObject* object )
			: ModelShapeObject( object )
		{
			// empty
		}


		///
		/// Clone
		///
		ModelEllipseObject* ModelEllipseObject::clone() const
		{
			return new ModelEllipseObject( this );
		}


		///
		/// Draw shadow of object
		///
		void ModelEllipseObject::drawShadow( QPainter*            painter,
		                                     bool                 inEditor,
		                                     const merge::Record& record,
		                                     const Variables&     variables ) const
		{
			QColor lineColor = mLineColorNode.color( record, variables );
			QColor fillColor = mFillColorNode.color( record, variables );
			QColor shadowColor = mShadowColorNode.color( record, variables );

			shadowColor.setAlphaF( mShadowOpacity );

			if ( fillColor.alpha() )
			{
				painter->setPen( Qt::NoPen );
				painter->setBrush( shadowColor );

				if ( lineColor.alpha() )
				{
					/* Has FILL and OUTLINE: adjust size to account for line width. */
					painter->drawEllipse( QRectF( -mLineWidth.pt()/2,
					                              -mLineWidth.pt()/2,
					                              (mW + mLineWidth).pt(),
					                              (mH + mLineWidth).pt() ) );
				}
				else
				{
					/* Has FILL, but no OUTLINE. */
					painter->drawEllipse( QRectF( 0, 0, mW.pt(), mH.pt() ) );
				}
			}
			else
			{
				if ( lineColor.alpha() )
				{
					/* Has only OUTLINE. */
					painter->setPen( QPen( shadowColor, mLineWidth.pt() ) );
					painter->setBrush( Qt::NoBrush );

					painter->drawEllipse( QRectF( 0, 0, mW.pt(), mH.pt() ) );
				}
			}
		
		}

	
		///
		/// Draw object itself
		///
		void ModelEllipseObject::drawObject( QPainter*            painter,
		                                     bool                 inEditor,
		                                     const merge::Record& record,
		                                     const Variables&     variables ) const
		{
			QColor lineColor = mLineColorNode.color( record, variables );
			QColor fillColor = mFillColorNode.color( record, variables );

			painter->setPen( QPen( lineColor, mLineWidth.pt() ) );
			painter->setBrush( fillColor );

			painter->drawEllipse( QRectF( 0, 0, mW.pt(), mH.pt() ) );
		}


		///
		/// Path to test for hover condition
		///
		QPainterPath ModelEllipseObject::hoverPath( double scale ) const
		{
			double s = 1 / scale;

			QPainterPath path;

			if ( mFillColorNode.color().alpha() && mLineColorNode.color().alpha() )
			{
				path.addEllipse( -mLineWidth.pt()/2, -mLineWidth.pt()/2, (mW+mLineWidth).pt(), (mH+mLineWidth).pt() );
			}
			else if ( mFillColorNode.color().alpha() && !(mLineColorNode.color().alpha()) )
			{
				path.addEllipse( 0, 0, mW.pt(), mH.pt() );
			}
			else if ( mLineColorNode.color().alpha() )
			{
				path.addEllipse( (-mLineWidth.pt()/2) - s*slopPixels,
				                 (-mLineWidth.pt()/2) - s*slopPixels,
				                 (mW + mLineWidth).pt() + s*2*slopPixels,
				                 (mH + mLineWidth).pt() + s*2*slopPixels );
				path.closeSubpath();
				path.addEllipse( mLineWidth.pt()/2 + s*slopPixels,
				                 mLineWidth.pt()/2 + s*slopPixels,
				                 (mW - mLineWidth).pt() - s*2*slopPixels,
				                 (mH - mLineWidth).pt() - s*2*slopPixels );
			}

			return path;
		}

	}
}