qgsplottool.cpp

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/***************************************************************************
                          qgsplottool.cpp
                          ---------------
    begin                : March 2022
    copyright            : (C) 2022 by Nyall Dawson
    email                : nyall dot dawson 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 "qgsplottool.h"
#include "moc_qgsplottool.cpp"
#include "qgsplotcanvas.h"
#include "qgsplotmouseevent.h"
 
#include <QWheelEvent>
#include <QAction>
 
QgsPlotTool::QgsPlotTool( QgsPlotCanvas *canvas, const QString &name )
  : QObject( canvas )
  , mCanvas( canvas )
  , mToolName( name )
{
  connect( mCanvas, &QgsPlotCanvas::willBeDeleted, this, [ = ]
  {
    mCanvas = nullptr;
  } );
}
 
QgsPoint QgsPlotTool::toMapCoordinates( const QgsPointXY &point ) const
{
  return mCanvas->toMapCoordinates( point );
}
 
QgsPointXY QgsPlotTool::toCanvasCoordinates( const QgsPoint &point ) const
{
  return mCanvas->toCanvasCoordinates( point );
}
 
bool QgsPlotTool::isClickAndDrag( QPoint startViewPoint, QPoint endViewPoint ) const
{
  const int diffX = endViewPoint.x() - startViewPoint.x();
  const int diffY = endViewPoint.y() - startViewPoint.y();
  return std::abs( diffX ) >= 2 || std::abs( diffY ) >= 2;
}
 
QPointF QgsPlotTool::constrainPointToRect( QPointF point, const QRectF &rect )
{
  if ( point.x() < rect.left() )
    point.setX( rect.left() );
  else if ( point.x() > rect.right() )
    point.setX( rect.right() );
 
  if ( point.y() < rect.top() )
    point.setY( rect.top() );
  else if ( point.y() > rect.bottom() )
    point.setY( rect.bottom() );
 
  return point;
}
 
QgsPlotTool::~QgsPlotTool()
{
  if ( mCanvas )
    mCanvas->unsetTool( this );
}
 
Qgis::PlotToolFlags QgsPlotTool::flags() const
{
  return Qgis::PlotToolFlags();
}
 
void QgsPlotTool::activate()
{
  // make action and/or button active
  if ( mAction )
    mAction->setChecked( true );
 
  mCanvas->viewport()->setCursor( mCursor );
  emit activated();
}
 
void QgsPlotTool::deactivate()
{
  if ( mAction )
    mAction->setChecked( false );
 
  emit deactivated();
}
 
bool QgsPlotTool::isActive() const
{
  return mCanvas && mCanvas->tool() == this;
}
 
void QgsPlotTool::plotMoveEvent( QgsPlotMouseEvent *event )
{
  event->ignore();
}
 
void QgsPlotTool::plotDoubleClickEvent( QgsPlotMouseEvent *event )
{
  event->ignore();
}
 
void QgsPlotTool::plotPressEvent( QgsPlotMouseEvent *event )
{
  event->ignore();
}
 
void QgsPlotTool::plotReleaseEvent( QgsPlotMouseEvent *event )
{
  event->ignore();
}
 
void QgsPlotTool::wheelEvent( QWheelEvent *event )
{
  event->ignore();
}
 
void QgsPlotTool::keyPressEvent( QKeyEvent *event )
{
  event->ignore();
}
 
void QgsPlotTool::keyReleaseEvent( QKeyEvent *event )
{
  event->ignore();
}
 
bool QgsPlotTool::gestureEvent( QGestureEvent * )
{
  return false;
}
 
bool QgsPlotTool::canvasToolTipEvent( QHelpEvent * )
{
  return false;
}
 
QgsPlotCanvas *QgsPlotTool::canvas() const
{
  return mCanvas;
}
 
void QgsPlotTool::setAction( QAction *action )
{
  mAction = action;
}
 
QAction *QgsPlotTool::action()
{
  return mAction;
}
 
void QgsPlotTool::setCursor( const QCursor &cursor )
{
  mCursor = cursor;
}
 
bool QgsPlotTool::populateContextMenuWithEvent( QMenu *, QgsPlotMouseEvent * )
{
  return false;
}