void QgsComposerView::scrollContentsBy( int dx, int dy )
{
QGraphicsView::scrollContentsBy( dx, dy );
updateRulers();
}
void QgsComposerView::mouseMoveEvent( QMouseEvent* e )
{
if ( !composition() )
{
return;
}
mMouseCurrentXY = e->pos();
//update cursor position in composer status bar
emit cursorPosChanged( mapToScene( e->pos() ) );
updateRulers();
if ( mHorizontalRuler )
{
mHorizontalRuler->updateMarker( e->posF() );
}
if ( mVerticalRuler )
{
mVerticalRuler->updateMarker( e->posF() );
}
if ( mPanning )
{
//panning, so scroll view
horizontalScrollBar()->setValue( horizontalScrollBar()->value() - ( e->x() - mMouseLastXY.x() ) );
verticalScrollBar()->setValue( verticalScrollBar()->value() - ( e->y() - mMouseLastXY.y() ) );
mMouseLastXY = e->pos();
return;
}
else if ( e->buttons() == Qt::NoButton )
{
if ( mCurrentTool == Select )
{
QGraphicsView::mouseMoveEvent( e );
}
}
else
{
QPointF scenePoint = mapToScene( e->pos() );
if ( mMarqueeSelect || mMarqueeZoom )
{
updateRubberBand( scenePoint );
return;
}
switch ( mCurrentTool )
{
case Select:
QGraphicsView::mouseMoveEvent( e );
break;
case AddArrow:
{
if ( mRubberBandLineItem )
{
mRubberBandLineItem->setLine( mRubberBandStartPos.x(), mRubberBandStartPos.y(), scenePoint.x(), scenePoint.y() );
}
break;
}
case AddMap:
case AddRectangle:
case AddTriangle:
case AddEllipse:
case AddHtml:
//adjust rubber band item
{
updateRubberBand( scenePoint );
break;
}
case MoveItemContent:
{
//update map preview if composer map
QgsComposerMap* composerMap = dynamic_cast<QgsComposerMap *>( mMoveContentItem );
if ( composerMap )
{
composerMap->setOffset( scenePoint.x() - mMoveContentStartPos.x(), scenePoint.y() - mMoveContentStartPos.y() );
composerMap->update();
}
break;
}
default:
break;
}
}
}
void QgsComposerView::wheelZoom( QWheelEvent * event )
{
//get mouse wheel zoom behaviour settings
QSettings mySettings;
int wheelAction = mySettings.value( "/qgis/wheel_action", 2 ).toInt();
double zoomFactor = mySettings.value( "/qgis/zoom_factor", 2 ).toDouble();
if (( QgsMapCanvas::WheelAction )wheelAction == QgsMapCanvas::WheelNothing )
{
return;
}
if ( event->modifiers() & Qt::ControlModifier )
{
//holding ctrl while wheel zooming results in a finer zoom
zoomFactor = 1.0 + ( zoomFactor - 1.0 ) / 10.0;
}
//caculate zoom scale factor
bool zoomIn = event->delta() > 0;
double scaleFactor = ( zoomIn ? 1 / zoomFactor : zoomFactor );
//get current visible part of scene
QRect viewportRect( 0, 0, viewport()->width(), viewport()->height() );
QgsRectangle visibleRect = QgsRectangle( mapToScene( viewportRect ).boundingRect() );
//transform the mouse pos to scene coordinates
QPointF scenePoint = mapToScene( event->pos() );
//adjust view center according to wheel action setting
switch (( QgsMapCanvas::WheelAction )wheelAction )
{
case QgsMapCanvas::WheelZoomAndRecenter:
{
centerOn( scenePoint.x(), scenePoint.y() );
break;
}
case QgsMapCanvas::WheelZoomToMouseCursor:
{
QgsPoint oldCenter( visibleRect.center() );
QgsPoint newCenter( scenePoint.x() + (( oldCenter.x() - scenePoint.x() ) * scaleFactor ),
scenePoint.y() + (( oldCenter.y() - scenePoint.y() ) * scaleFactor ) );
centerOn( newCenter.x(), newCenter.y() );
break;
}
default:
break;
}
//zoom composition
if ( zoomIn )
{
scale( zoomFactor, zoomFactor );
}
else
{
scale( 1 / zoomFactor, 1 / zoomFactor );
}
//update composition for new zoom
emit zoomLevelChanged();
updateRulers();
update();
//redraw cached map items
QList<QGraphicsItem *> itemList = composition()->items();
QList<QGraphicsItem *>::iterator itemIt = itemList.begin();
for ( ; itemIt != itemList.end(); ++itemIt )
{
QgsComposerMap* mypItem = dynamic_cast<QgsComposerMap *>( *itemIt );
if (( mypItem ) && ( mypItem->previewMode() == QgsComposerMap::Render ) )
{
mypItem->updateCachedImage();
}
}
}
void QgsComposerView::resizeEvent( QResizeEvent* event )
{
QGraphicsView::resizeEvent( event );
emit zoomLevelChanged();
updateRulers();
}
void QgsComposerView::wheelZoom( QWheelEvent * event )
{
//get mouse wheel zoom behaviour settings
QSettings mySettings;
int wheelAction = mySettings.value( "/qgis/wheel_action", 2 ).toInt();
double zoomFactor = mySettings.value( "/qgis/zoom_factor", 2 ).toDouble();
//caculate zoom scale factor
bool zoomIn = event->delta() > 0;
double scaleFactor = ( zoomIn ? 1 / zoomFactor : zoomFactor );
//get current visible part of scene
QRect viewportRect( 0, 0, viewport()->width(), viewport()->height() );
QgsRectangle visibleRect = QgsRectangle( mapToScene( viewportRect ).boundingRect() );
//transform the mouse pos to scene coordinates
QPointF scenePoint = mapToScene( event->pos() );
//zoom composition, respecting wheel action setting
switch (( QgsMapCanvas::WheelAction )wheelAction )
{
case QgsMapCanvas::WheelZoom:
// zoom without changing extent
if ( zoomIn )
{
scale( zoomFactor, zoomFactor );
}
else
{
scale( 1 / zoomFactor, 1 / zoomFactor );
}
break;
case QgsMapCanvas::WheelZoomAndRecenter:
{
visibleRect.scale( scaleFactor, scenePoint.x(), scenePoint.y() );
fitInView( visibleRect.toRectF(), Qt::KeepAspectRatio );
break;
}
case QgsMapCanvas::WheelZoomToMouseCursor:
{
QgsPoint oldCenter( visibleRect.center() );
QgsPoint newCenter( scenePoint.x() + (( oldCenter.x() - scenePoint.x() ) * scaleFactor ),
scenePoint.y() + (( oldCenter.y() - scenePoint.y() ) * scaleFactor ) );
visibleRect.scale( scaleFactor, newCenter.x(), newCenter.y() );
fitInView( visibleRect.toRectF(), Qt::KeepAspectRatio );
break;
}
case QgsMapCanvas::WheelNothing:
return;
}
//update composition for new zoom
updateRulers();
update();
//redraw cached map items
QList<QGraphicsItem *> itemList = composition()->items();
QList<QGraphicsItem *>::iterator itemIt = itemList.begin();
for ( ; itemIt != itemList.end(); ++itemIt )
{
QgsComposerMap* mypItem = dynamic_cast<QgsComposerMap *>( *itemIt );
if (( mypItem ) && ( mypItem->previewMode() == QgsComposerMap::Render ) )
{
mypItem->updateCachedImage();
}
}
}
void QgsComposerView::resizeEvent( QResizeEvent* event )
{
QGraphicsView::resizeEvent( event );
updateRulers();
}
void QgsComposerView::mouseMoveEvent( QMouseEvent* e )
{
if ( !composition() )
{
return;
}
updateRulers();
if ( mHorizontalRuler )
{
mHorizontalRuler->updateMarker( e->posF() );
}
if ( mVerticalRuler )
{
mVerticalRuler->updateMarker( e->posF() );
}
if ( e->buttons() == Qt::NoButton )
{
if ( mCurrentTool == Select )
{
QGraphicsView::mouseMoveEvent( e );
}
}
else
{
QPointF scenePoint = mapToScene( e->pos() );
switch ( mCurrentTool )
{
case Select:
QGraphicsView::mouseMoveEvent( e );
break;
case AddArrow:
{
if ( mRubberBandLineItem )
{
mRubberBandLineItem->setLine( mRubberBandStartPos.x(), mRubberBandStartPos.y(), scenePoint.x(), scenePoint.y() );
}
break;
}
case AddMap:
case AddRectangle:
case AddTriangle:
case AddEllipse:
case AddHtml:
//adjust rubber band item
{
double x = 0;
double y = 0;
double width = 0;
double height = 0;
double dx = scenePoint.x() - mRubberBandStartPos.x();
double dy = scenePoint.y() - mRubberBandStartPos.y();
if ( dx < 0 )
{
x = scenePoint.x();
width = -dx;
}
else
{
x = mRubberBandStartPos.x();
width = dx;
}
if ( dy < 0 )
{
y = scenePoint.y();
height = -dy;
}
else
{
y = mRubberBandStartPos.y();
height = dy;
}
if ( mRubberBandItem )
{
mRubberBandItem->setRect( 0, 0, width, height );
QTransform t;
t.translate( x, y );
mRubberBandItem->setTransform( t );
}
break;
}
case MoveItemContent:
{
//update map preview if composer map
QgsComposerMap* composerMap = dynamic_cast<QgsComposerMap *>( mMoveContentItem );
if ( composerMap )
{
composerMap->setOffset( scenePoint.x() - mMoveContentStartPos.x(), scenePoint.y() - mMoveContentStartPos.y() );
composerMap->update();
}
break;
}
default:
break;
}
}
}
void QgsLayoutView::scrollContentsBy( int dx, int dy )
{
QGraphicsView::scrollContentsBy( dx, dy );
updateRulers();
}
void QgsLayoutView::zoomFull()
{
fitInView( scene()->sceneRect(), Qt::KeepAspectRatio );
updateRulers();
emit zoomLevelChanged();
}
void QgsLayoutView::setVerticalRuler( QgsLayoutRuler *ruler )
{
mVerticalRuler = ruler;
ruler->setLayoutView( this );
updateRulers();
}
void QgsLayoutView::setHorizontalRuler( QgsLayoutRuler *ruler )
{
mHorizontalRuler = ruler;
ruler->setLayoutView( this );
updateRulers();
}
