void TagViewer::paintEvent(
QPaintEvent* /*e*/
)
{
QPainter p( this );
float scale_f = scale_factor();
QRect drawing_area( 0, 0, size().width(), size().height() );
if( !pix_.isNull() && !size().isNull() ) {
p.drawPixmap( drawing_area, pix_ );
} else {
QTextOption options( Qt::AlignLeft );
options.setWrapMode( QTextOption::WordWrap );
p.setPen( QPen( Qt::red, 4 ) );
p.drawText(
QRectF( drawing_area ),
"Image cannot be displayed. Check:\n"
" - the same image is selected among the multiple selection (it's ok to select labels)\n"
" - the image file is still at the same disk location when imported\n"
" - the image format is valid and/or the file is not corrupted ",
options
);
return;
}
QFont font;
font.setPointSize( 10 );
p.setFont( font );
// draw bounding boxes
for( QList<TagDisplayElement>::iterator tag_itr = elts_.begin(); tag_itr != elts_.end(); ++tag_itr ) {
const TagDisplayElement& tag = *tag_itr;
const QList<QRect>& bbox = tag._bbox;
p.setPen( QPen( tag._color, 2 ) );
for( QList<QRect>::const_iterator bbox_itr = bbox.begin(); bbox_itr != bbox.end(); ++bbox_itr ) {
const QRect& box_rect = *bbox_itr;
QRect scaled_box( scale_f * box_rect.topLeft(), scale_f * box_rect.bottomRight() );
p.drawRect( scaled_box );
p.drawText( scaled_box.x(), scaled_box.y(), tag._label );
}
}
// draw current box being tagged
p.setPen( QPen( current_color_, 2 ) );
if( tagging_ && tag_start_ != tag_end_ ) {
QRect current_rect( tag_start_, tag_end_ );
p.drawRect( current_rect );
p.drawText( current_rect.x(), current_rect.y(), current_label_ );
}
}
/**
* @brief ElementScene::mouseMoveEvent
* @param e
*/
void ElementScene::mouseMoveEvent(QGraphicsSceneMouseEvent *e) {
if (m_event_interface) {
if (m_event_interface -> mouseMoveEvent(e)) {
if (m_event_interface->isFinish()) {
emit(partsAdded());
delete m_event_interface; m_event_interface = NULL;
}
return;
}
}
QPointF event_pos = e -> scenePos();
if (!e -> modifiers() & Qt::ControlModifier)
event_pos = snapToGrid(event_pos);
if (behavior == PasteArea) {
QRectF current_rect(paste_area_ -> rect());
current_rect.moveCenter(event_pos);
paste_area_ -> setRect(current_rect);
return;
}
QGraphicsScene::mouseMoveEvent(e);
}
