void QgsMapOverviewCanvas::refresh()
{
updateFullExtent();
if ( !mSettings.hasValidSettings() )
{
mPixmap = QPixmap();
update();
return; // makes no sense to render anything
}
if ( mJob )
{
QgsDebugMsg( "oveview - cancelling old" );
mJob->cancel();
QgsDebugMsg( "oveview - deleting old" );
delete mJob; // get rid of previous job (if any)
}
QgsDebugMsg( "oveview - starting new" );
// TODO: setup overview mode
mJob = new QgsMapRendererSequentialJob( mSettings );
connect( mJob, SIGNAL( finished() ), this, SLOT( mapRenderingFinished() ) );
mJob->start();
setBackgroundColor( mMapCanvas->mapSettings().backgroundColor() );
// schedule repaint
update();
// update panning widget
drawExtentRect();
}
void QgsMapOverviewCanvas::refresh()
{
if ( mPixmap.isNull() || mPixmap.paintingActive() )
return;
mPixmap.fill( mBgColor ); //palette().color(backgroundRole());
QPainter painter;
painter.begin( &mPixmap );
// antialiasing
if ( mAntiAliasing )
painter.setRenderHint( QPainter::Antialiasing );
// render image
mMapRenderer->render( &painter );
painter.end();
// schedule repaint
update();
// update panning widget
drawExtentRect();
}
QgsMapOverviewCanvas::QgsMapOverviewCanvas( QWidget * parent, QgsMapCanvas* mapCanvas )
: QWidget( parent )
, mMapCanvas( mapCanvas )
, mJob( 0 )
{
setObjectName( "theOverviewCanvas" );
mPanningWidget = new QgsPanningWidget( this );
mSettings.setFlag( QgsMapSettings::DrawLabeling, false );
connect( mMapCanvas, SIGNAL( extentsChanged() ), this, SLOT( drawExtentRect() ) );
}
void QgsMapOverviewCanvas::updateFullExtent()
{
QgsRectangle rect;
if ( mSettings.hasValidSettings() )
rect = mSettings.fullExtent();
else
rect = mMapCanvas->fullExtent();
// expand a bit to keep features on margin
rect.scale( 1.1 );
mSettings.setExtent( rect );
drawExtentRect();
}
void QgsMapOverviewCanvas::updateFullExtent( const QgsRectangle& rect )
{
mMapRenderer->setExtent( rect );
drawExtentRect();
}
