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/***************************************************************************
qgsmaptooltouch.cpp - map tool for zooming and panning using qgestures
----------------------
begin : February 2012
copyright : (C) 2012 by Marco Bernasocchi
email : marco at bernawebdesign.ch
***************************************************************************
* *
* 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 "qgsmaptooltouch.h"
#include "qgsmapcanvas.h"
#include "qgscursors.h"
#include "qgsmaptopixel.h"
#include <QBitmap>
#include <QCursor>
#include <QMouseEvent>
#include <qgslogger.h>
QgsMapToolTouch::QgsMapToolTouch( QgsMapCanvas* canvas )
: QgsMapTool( canvas ), mDragging( false ), mPinching( false )
{
// set cursor
// QBitmap panBmp = QBitmap::fromData( QSize( 16, 16 ), pan_bits );
// QBitmap panBmpMask = QBitmap::fromData( QSize( 16, 16 ), pan_mask_bits );
// mCursor = QCursor( panBmp, panBmpMask, 5, 5 );
}
QgsMapToolTouch::~QgsMapToolTouch()
{
mCanvas->ungrabGesture( Qt::PinchGesture );
}
void QgsMapToolTouch::activate()
{
mCanvas->grabGesture( Qt::PinchGesture );
QgsMapTool::activate();
}
void QgsMapToolTouch::deactivate()
{
mCanvas->ungrabGesture( Qt::PinchGesture );
QgsMapTool::deactivate();
}
void QgsMapToolTouch::canvasMoveEvent( QMouseEvent * e )
{
if ( !mPinching )
{
if (( e->buttons() & Qt::LeftButton ) )
{
mDragging = true;
// move map and other canvas items
mCanvas->panAction( e );
}
}
}
void QgsMapToolTouch::canvasReleaseEvent( QMouseEvent * e )
{
if ( !mPinching )
{
if ( e->button() == Qt::LeftButton )
{
if ( mDragging )
{
mCanvas->panActionEnd( e->pos() );
mDragging = false;
}
else // add pan to mouse cursor
{
// transform the mouse pos to map coordinates
QgsPoint center = mCanvas->getCoordinateTransform()->toMapPoint( e->x(), e->y() );
mCanvas->setExtent( QgsRectangle( center, center ) );
mCanvas->refresh();
}
}
}
}
void QgsMapToolTouch::canvasDoubleClickEvent( QMouseEvent *e )
{
if ( !mPinching )
{
mCanvas->zoomWithCenter( e->x(), e->y(), true );
}
}
bool QgsMapToolTouch::gestureEvent( QGestureEvent *event )
{
qDebug() << "gesture " << event;
if ( QGesture *gesture = event->gesture( Qt::PinchGesture ) )
{
mPinching = true;
pinchTriggered( static_cast<QPinchGesture *>( gesture ) );
}
return true;
}
void QgsMapToolTouch::pinchTriggered( QPinchGesture *gesture )
{
if ( gesture->state() == Qt::GestureFinished )
{
//a very small totalScaleFactor indicates a two finger tap (pinch gesture without pinching)
if ( 0.98 < gesture->totalScaleFactor() && gesture->totalScaleFactor() < 1.02 )
{
mCanvas->zoomOut();
}
else
{
//Transfor global coordinates to widget coordinates
QPoint pos = gesture->centerPoint().toPoint();
pos = mCanvas->mapFromGlobal( pos );
// transform the mouse pos to map coordinates
QgsPoint center = mCanvas->getCoordinateTransform()->toMapPoint( pos.x(), pos.y() );
QgsRectangle r = mCanvas->extent();
r.scale( 1 / gesture->totalScaleFactor(), ¢er );
mCanvas->setExtent( r );
mCanvas->refresh();
}
mPinching = false;
}
}
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