src/gui/qgsmaptool.cpp

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/***************************************************************************
    qgsmaptool.cpp  -  base class for map canvas tools
    ----------------------
    begin                : January 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.                                   *
 *                                                                         *
 ***************************************************************************/
/* $Id$ */

#include "qgslogger.h"
#include "qgsmaptool.h"
#include "qgsmapcanvas.h"
#include "qgsmaptopixel.h"
#include "qgsmaprenderer.h"
#include <QAction>
#include <QAbstractButton>

QgsMapTool::QgsMapTool( QgsMapCanvas* canvas )
    : QObject( canvas ), mCanvas( canvas ), mCursor( Qt::CrossCursor ), mAction( NULL ), mButton( NULL )
{
}


QgsMapTool::~QgsMapTool()
{
  mCanvas->unsetMapTool( this );
}


QgsPoint QgsMapTool::toMapCoordinates( const QPoint& point )
{
  return mCanvas->getCoordinateTransform()->toMapCoordinates( point );
}


QgsPoint QgsMapTool::toLayerCoordinates( QgsMapLayer* layer, const QPoint& point )
{
  QgsPoint pt = toMapCoordinates( point );
  return toLayerCoordinates( layer, pt );
}

QgsPoint QgsMapTool::toLayerCoordinates( QgsMapLayer* layer, const QgsPoint& point )
{
  return mCanvas->mapRenderer()->mapToLayerCoordinates( layer, point );
}

QgsPoint QgsMapTool::toMapCoordinates( QgsMapLayer* layer, const QgsPoint& point )
{
  return mCanvas->mapRenderer()->layerToMapCoordinates( layer, point );
}

QgsRectangle QgsMapTool::toLayerCoordinates( QgsMapLayer* layer, const QgsRectangle& rect )
{
  return mCanvas->mapRenderer()->mapToLayerCoordinates( layer, rect );
}

QPoint QgsMapTool::toCanvasCoordinates( const QgsPoint& point )
{
  double x = point.x(), y = point.y();
  mCanvas->getCoordinateTransform()->transformInPlace( x, y );
  return QPoint(( int )( x + 0.5 ), ( int )( y + 0.5 ) ); // round the values
}


void QgsMapTool::activate()
{
  // make action and/or button active
  if ( mAction )
    mAction->setChecked( true );
  if ( mButton )
    mButton->setChecked( true );

  // set cursor (map tools usually set it in constructor)
  mCanvas->setCursor( mCursor );
  QgsDebugMsg( "Cursor has been set" );
}


void QgsMapTool::deactivate()
{
  if ( mAction )
    mAction->setChecked( false );
  if ( mButton )
    mButton->setChecked( false );
}

void QgsMapTool::setAction( QAction* action )
{
  mAction = action;
}

QAction* QgsMapTool::action()
{
  return mAction;
}

void QgsMapTool::setButton( QAbstractButton* button )
{
  mButton = button;
}

QAbstractButton* QgsMapTool::button()
{
  return mButton;
}


void QgsMapTool::canvasMoveEvent( QMouseEvent * )
{
}

void QgsMapTool::canvasDoubleClickEvent( QMouseEvent * )
{
}

void QgsMapTool::canvasPressEvent( QMouseEvent * )
{
}

void QgsMapTool::canvasReleaseEvent( QMouseEvent * )
{
}

void QgsMapTool::keyPressEvent( QKeyEvent* e )
{
}

void QgsMapTool::keyReleaseEvent( QKeyEvent* e )
{
}

void QgsMapTool::renderComplete()
{
}

bool QgsMapTool::isTransient()
{
  return false;
}

bool QgsMapTool::isEditTool()
{
  return false;
}

QgsMapCanvas* QgsMapTool::canvas()
{
  return mCanvas;
}