qgsvertexmarker.cpp

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/***************************************************************************
    qgsvertexmarker.cpp  - canvas item which shows a simple vertex marker
    ---------------------
    begin                : February 2006
    copyright            : (C) 2006 by Martin Dobias
    email                : wonder.sk at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program 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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include <QPainter>

#include "qgsvertexmarker.h"


QgsVertexMarker::QgsVertexMarker( QgsMapCanvas* mapCanvas )
    : QgsMapCanvasItem( mapCanvas )
{
  mIconSize = 10;
  mIconType = ICON_X;
  mColor = QColor( 255, 0, 0 );
  mPenWidth = 1;
}

void QgsVertexMarker::setIconType( int type )
{
  mIconType = type;
}

void QgsVertexMarker::setIconSize( int iconSize )
{
  mIconSize = iconSize;
}

void QgsVertexMarker::setCenter( const QgsPoint& point )
{
  mCenter = point;
  QPointF pt = toCanvasCoordinates( mCenter );
  setPos( pt );
}

void QgsVertexMarker::setColor( const QColor& color )
{
  mColor = color;
}

void QgsVertexMarker::setPenWidth( int width )
{
  mPenWidth = width;
}

void QgsVertexMarker::paint( QPainter* p )
{
  qreal s = ( mIconSize - 1 ) / 2.0;

  QPen pen( mColor );
  pen.setWidth( mPenWidth );
  p->setPen( pen );

  switch ( mIconType )
  {
    case ICON_NONE:
      break;

    case ICON_CROSS:
      p->drawLine( QLineF( -s, 0, s, 0 ) );
      p->drawLine( QLineF( 0, -s, 0, s ) );
      break;

    case ICON_X:
      p->drawLine( QLineF( -s, -s, s, s ) );
      p->drawLine( QLineF( -s, s, s, -s ) );
      break;

    case ICON_BOX:
      p->drawLine( QLineF( -s, -s, s, -s ) );
      p->drawLine( QLineF( s, -s, s, s ) );
      p->drawLine( QLineF( s, s, -s, s ) );
      p->drawLine( QLineF( -s, s, -s, -s ) );
      break;
  }
}


QRectF QgsVertexMarker::boundingRect() const
{
  qreal s = qreal( mIconSize + mPenWidth ) / 2.0;
  return QRectF( -s, -s, 2.0*s, 2.0*s );
}

void QgsVertexMarker::updatePosition()
{
  setCenter( mCenter );
}