// Set the number of past visuals to show.
void
OrkObjectDisplay::updateHistoryLength()
{
int new_length = history_length_property_->getInt();
// Create a new array of visual pointers, all NULL.
std::vector<boost::shared_ptr<OrkObjectVisual> > new_visuals(new_length);
// Copy the contents from the old array to the new.
// (Number to copy is the minimum of the 2 vector lengths).
size_t copy_len = (new_visuals.size() > visuals_.size()) ? visuals_.size() : new_visuals.size();
for (size_t i = 0; i < copy_len; i++)
{
int new_index = (messages_received_ - i) % new_visuals.size();
int old_index = (messages_received_ - i) % visuals_.size();
new_visuals[new_index] = visuals_[old_index];
}
// We don't need to create any new visuals here, they are created as
// needed when messages are received.
// Put the new vector into the member variable version and let the
// old one go out of scope.
visuals_.swap(new_visuals);
}
// Set the number of past visuals to show.
void AmbientSoundDisplay::setHistoryLength( int length )/*{{{*/
{
// Don't let people enter invalid values.
if( length < 1 )
{
length = 1;
}
// If the length is not changing, we don't need to do anything.
if( history_length_ == length )
{
return;
}
// Set the actual variable.
history_length_ = length;
propertyChanged( history_length_property_ );
// Create a new array of visual pointers, all NULL.
std::vector<AmbientSoundVisual*> new_visuals( history_length_, (AmbientSoundVisual*)0 );
// Copy the contents from the old array to the new.
// (Number to copy is the minimum of the 2 vector lengths).
size_t copy_len =
(new_visuals.size() > visuals_.size()) ?
visuals_.size() : new_visuals.size();
for( size_t i = 0; i < copy_len; i++ )
{
int new_index = (messages_received_ - i) % new_visuals.size();
int old_index = (messages_received_ - i) % visuals_.size();
new_visuals[ new_index ] = visuals_[ old_index ];
visuals_[ old_index ] = NULL;
}
// Delete any remaining old visuals
for( size_t i = 0; i < visuals_.size(); i++ ) {
delete visuals_[ i ];
}
// We don't need to create any new visuals here, they are created as
// needed when messages are received.
// Put the new vector into the member variable version and let the
// old one go out of scope.
visuals_.swap( new_visuals );
}/*}}}*/
